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Parr TE, Farrokhi S, Hendershot BD, Butowicz CM. Peak tibial axial acceleration during walking is related to intact-side lower limb pain in persons with unilateral transtibial amputation. Gait Posture 2024; 109:165-169. [PMID: 38310849 DOI: 10.1016/j.gaitpost.2024.01.033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/18/2023] [Revised: 11/16/2023] [Accepted: 01/25/2024] [Indexed: 02/06/2024]
Abstract
BACKGROUND Persons who undergo unilateral transtibial amputation are at an increased risk of secondary musculoskeletal joint pain and degeneration, which has been linked to excessive loading rates of the intact-side limb. Tibial axial acceleration, a feasible measure of loading rates with wearable sensors, would be clinically useful to relate to joint pain in persons with unilateral transtibial amputation. RESEARCH QUESTION What is the relationship between peak tibial axial accelerations and intact-side joint pain in persons with unilateral transtibial amputation during walking? METHODS Persons with unilateral transtibial amputation (n = 51) were separated into two groups based on the presence of intact-side limb pain (with pain: n = 16; without pain: n = 35). Tibial axial accelerations were measured with bilateral shank-mounted IMUs while participants completed three 10-meter walk tests. Peak tibial axial accelerations for each limb and between-limb symmetry were compared between groups using analysis of co-variance; significance was set at 0.05. RESULTS Between persons with vs. without intact-side limb pain, peak tibial axial accelerations were smaller on the prosthetic side (0.64 vs. 0.81 g; p = 0.04), similar on the intact side (0.82 vs. 0.79 g; p = 0.53), and more asymmetrical between sides (intact > prosthetic) (0.81 vs. 1.03 g; p = 0.01). SIGNIFICANCE Symmetry in peak tibial axial acceleration can assist with identifying preferential limb loading during walking and, with future research, could serve as a useful clinical target for intact-side limb unloading strategies to help mitigate secondary musculoskeletal pain in persons with unilateral transtibial amputation.
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Affiliation(s)
- Therese E Parr
- Oak Ridge Institute for Science and Education, Oak Ridge, TN, USA; Extremity Trauma and Amputation Center of Excellence, Defense Health Agency, Falls Church, VA, USA; Naval Medical Center San Diego, San Diego, CA, USA
| | - Shawn Farrokhi
- Extremity Trauma and Amputation Center of Excellence, Defense Health Agency, Falls Church, VA, USA; Naval Medical Center San Diego, San Diego, CA, USA; Uniformed Services University of the Health Sciences, Bethesda, MD, USA
| | - Brad D Hendershot
- Extremity Trauma and Amputation Center of Excellence, Defense Health Agency, Falls Church, VA, USA; Walter Reed National Military Medical Center, Bethesda, MD, USA; Uniformed Services University of the Health Sciences, Bethesda, MD, USA
| | - Courtney M Butowicz
- Extremity Trauma and Amputation Center of Excellence, Defense Health Agency, Falls Church, VA, USA; Walter Reed National Military Medical Center, Bethesda, MD, USA; Uniformed Services University of the Health Sciences, Bethesda, MD, USA.
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Butowicz CM, Golyski PR, Acasio JC, Hendershot BD. Comparing spinal loads in individuals with unilateral transtibial amputation with and without chronic low back pain: An EMG-informed approach. J Biomech 2024; 166:111966. [PMID: 38373872 DOI: 10.1016/j.jbiomech.2024.111966] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2023] [Revised: 01/11/2024] [Accepted: 01/24/2024] [Indexed: 02/21/2024]
Abstract
Chronic low back pain (cLBP) is highly prevalent after lower limb amputation (LLA), likely due in part to biomechanical factors. Here, three-dimensional full-body kinematics and kinetics during level-ground walking, at a self-selected and three controlled speeds (1.0, 1.3, and 1.6 m/s), were collected from twenty-one persons with unilateral transtibial LLA, with (n = 9) and without cLBP (n = 12). Peak compressive, mediolateral, and anteroposterior L5-S1 spinal loads were estimated from a full-body, transtibial amputation-specific OpenSim model and compared between groups. Predicted lumbar joint torques from muscle activations were compared to inverse dynamics and predicted and measured electromyographic muscle activations were compared for model evaluation and verification. There were no group differences in compressive or anterior shear forces (p > 0.466). During intact stance, peak ipsilateral loads increased with speed to a greater extent in the cLBP group vs. no cLBP group (p=0.023), while during prosthetic stance, peak contralateral loads were larger in the no cLBP group (p=0.047) and increased to a greater extent with walking speed compared to the cLBP group (p=0.008). During intact stance, intact side external obliques had higher activations in the no cLBP group (p=0.039), and internal obliques had higher activations in the cLBP group at faster walking speeds compared to the no cLBP group. Predicted muscle activations demonstrated similar activation patterns to electromyographic-measured activations (r = 0.56-0.96), and error between inverse dynamics and simulated spinal moments was low (0.08 Nm RMS error). Persons with transtibial LLA and cLBP may adopt movement strategies during walking to reduce mediolateral shear forces at the L5-S1 joint, particularly as walking speed increases. However, future work is needed to understand the time course from pain onset to chronification and the cumulative influence of increased spinal loads over time.
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Affiliation(s)
- Courtney M Butowicz
- Research & Surveillance Section, Extremity Trauma and Amputation Center of Excellence, Defense Health Agency, Falls Church, VA 22042, United States; Department of Rehabilitation, Walter Reed National Military Medical Center, Bethesda, MD 20889, United States; Department of Physical Medicine & Rehabilitation, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, United States.
| | - Pawel R Golyski
- Research & Surveillance Section, Extremity Trauma and Amputation Center of Excellence, Defense Health Agency, Falls Church, VA 22042, United States; Department of Rehabilitation, Walter Reed National Military Medical Center, Bethesda, MD 20889, United States
| | - Julian C Acasio
- Research & Surveillance Section, Extremity Trauma and Amputation Center of Excellence, Defense Health Agency, Falls Church, VA 22042, United States; Department of Rehabilitation, Walter Reed National Military Medical Center, Bethesda, MD 20889, United States
| | - Brad D Hendershot
- Research & Surveillance Section, Extremity Trauma and Amputation Center of Excellence, Defense Health Agency, Falls Church, VA 22042, United States; Department of Rehabilitation, Walter Reed National Military Medical Center, Bethesda, MD 20889, United States; Department of Physical Medicine & Rehabilitation, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, United States
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Nevado R, Arteaga A, Fernández-Montalvo J. [Psychological consequences of amputations in work accidents]. Rev Esp Salud Publica 2024; 98:e202402015. [PMID: 38421014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Accepted: 07/14/2023] [Indexed: 03/02/2024] Open
Abstract
OBJECTIVE Amputations in work accidents are a phenomenon with a high incidence and peculiar characteristics. The few studies about the effects of amputation are referred to large limbs, and show that, beyond the physical consequences, there are important psychological consequences. The goal of this paper was to show the updated knowledge on the main psychopathological consequences of amputations in work accidents, as well as the variables that can modulate them. METHODS A non-systematic bibliographic review was carried out, with varied ad hoc searches for the different variables studied. RESULTS Studies have focused mainly on anxiety and depressive symptoms, post-traumatic stress disorder, and phantom limb pain. Modulating variables whose presence improves the prognosis of these persons have been identified, such as adaptation to daily life, physical exercise, coping strategies, resilience and quality of life. CONCLUSIONS The different psychological areas reviewed should be considered when attending people who have suffered an amputation in a work accident. Likewise, enhancing the modulating variables whose presence improves the prognosis is an interesting field for professional intervention.
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Affiliation(s)
- Rubén Nevado
- Departamento de Ciencias de la Salud; Universidad Pública de Navarra. Pamplona. España
| | - Alfonso Arteaga
- Departamento de Ciencias de la Salud; Universidad Pública de Navarra. Pamplona. España
- Instituto de Investigación Sanitaria de Navarra (IdiSNA). Pamplona. España
| | - Javier Fernández-Montalvo
- Departamento de Ciencias de la Salud; Universidad Pública de Navarra. Pamplona. España
- Instituto de Investigación Sanitaria de Navarra (IdiSNA). Pamplona. España
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Witt M, Domazet T, Dong A, Handler C, Nella K, Dilkas S, Campbell J, Guilcher SJT, MacKay C. Understanding transitions in care for persons with limb loss: a qualitative study exploring health care providers' perspectives. Disabil Rehabil 2024:1-8. [PMID: 38205588 DOI: 10.1080/09638288.2023.2301477] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Accepted: 12/27/2023] [Indexed: 01/12/2024]
Abstract
PURPOSE To explore health care providers' (HCP) experiences related to transitions in care from inpatient rehabilitation to the community for patients with limb loss. MATERIALS AND METHODS A qualitative study was conducted using semi-structured interviews. Participants were eligible if they were HCPs currently working in amputation rehabilitation at a rehabilitation hospital in Ontario, Canada, with at least 1-year experience in this setting, and could speak and understand English. Data were analyzed thematically using the six-step process of the DEPICT model dynamic reading, engaged codebook development, participatory coding, inclusive reviewing and summarizing of categories, collaborative analyzing and translating. RESULTS Fourteen HCPs from a variety of health care professions participated in this study. Five key themes describe participants' perspectives on the factors impacting patients' transition in care following limb loss. Specifically, participants emphasized patient preparedness, HCP follow-up, finances and funding, patient self-management skills, and psychosocial support as factors that could influence the transition in care. CONCLUSION This study identified challenges to transitions in care for people with limb loss. Future research is needed to evaluate solutions to address these challenges in transitions in care.
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Affiliation(s)
- Micah Witt
- Department of Physical Therapy, University of Toronto, Toronto, Ontario, Canada
| | - Teah Domazet
- Department of Physical Therapy, University of Toronto, Toronto, Ontario, Canada
| | - Alexandra Dong
- Department of Physical Therapy, University of Toronto, Toronto, Ontario, Canada
| | - Carly Handler
- Department of Physical Therapy, University of Toronto, Toronto, Ontario, Canada
| | - Katrina Nella
- Department of Physical Therapy, University of Toronto, Toronto, Ontario, Canada
| | - Steve Dilkas
- Division of Physical Medicine and Rehabilitation, Temerty Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada
- West Park Healthcare Centre, Toronto, Ontario, Canada
| | - Janet Campbell
- Department of Physical Therapy, University of Toronto, Toronto, Ontario, Canada
- West Park Healthcare Centre, Toronto, Ontario, Canada
| | - Sara J T Guilcher
- Department of Physical Therapy, University of Toronto, Toronto, Ontario, Canada
- Leslie Dan Faculty of Pharmacy, University of Toronto, Toronto, Ontario, Canada
| | - Crystal MacKay
- Department of Physical Therapy, University of Toronto, Toronto, Ontario, Canada
- West Park Healthcare Centre, Toronto, Ontario, Canada
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Jennissen CA, Krupp TD, Vakkalanka JP, Hoogerwerf PJ. Pediatric lawn mower-related injuries and contributing factors for bystander injuries. Inj Epidemiol 2023; 10:51. [PMID: 37864276 PMCID: PMC10589918 DOI: 10.1186/s40621-023-00468-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2022] [Accepted: 10/11/2023] [Indexed: 10/22/2023] Open
Abstract
BACKGROUND Riding lawn mower injuries are the most common cause of major limb loss in young U.S. children. Our study objective was to investigate the circumstances surrounding pediatric riding lawn mower injuries and to identify potential contributing risk factors and behaviors leading to these events. METHODS Followers/members of both a public and a private lawn mower injury support and prevention Facebook page who had or were aware of children who had suffered a lawn mower-related injury were invited to complete an electronic survey on Qualtrics. Duplicate cases and those involving push mowers were removed. Frequencies and chi-square analyses were performed. RESULTS 140 injured children were identified with 71% of surveys completed by parents and 19% by an adult survivor of a childhood incident. The majority of injured children were Caucasian (94%), male (64%), and ≤ 5 years of age at the time of the incident (63%). Bystanders were 69% of those injured, 24% were lawn mower riders, and mower operators and others accounted for 7%. The lawn mower operator was usually male (77%), being the father/stepfather in almost half. Overall, 59% of injuries occurred while traveling in reverse, 29% while moving forward. Nearly all (92%) had an amputation and/or permanent disability. Subgroup analysis (n = 130) found injured bystanders were younger than injured passengers with 71% versus 45% being < 5 years of age, respectively (p = 0.01). Over three-quarters of bystander incidents occurred while moving in reverse as compared to 17% of passenger incidents (p < 0.01). Amputations and/or permanent disabilities were greater among bystanders (97%) as compared to passengers (79%, p = 0.01). Only 3% of bystanders had an upper extremity injury as compared to 21% of passengers (p = 0.01). Seventy-three percent of bystander victims had received at least one ride on a lawn mower prior to their injury incident. CONCLUSIONS Child bystanders seriously injured by riding lawn mowers were frequently given prior rides likely desensitizing them to their inherent dangers and leading them to seek rides when mowers were being used. Engineering changes preventing blade rotation when traveling in reverse and not giving children rides (both when and when not mowing) may be critical in preventing mower-related injuries.
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Affiliation(s)
- Charles A. Jennissen
- Department of Emergency Medicine, Roy J. and Lucille A. Carver College of Medicine, University of Iowa, Iowa City, IA USA
- Stead Family Department of Pediatrics, Roy J. and Lucille A. Carver College of Medicine, University of Iowa, Iowa City, IA USA
| | - Treyton D. Krupp
- Roy J. and Lucille A. Carver College of Medicine, University of Iowa, Iowa City, IA USA
| | - J. Priyanka Vakkalanka
- Department of Emergency Medicine, Roy J. and Lucille A. Carver College of Medicine, University of Iowa, Iowa City, IA USA
| | - Pamela J. Hoogerwerf
- Injury Prevention and Community Outreach, University of Iowa Stead Family Children’s Hospital, University of Iowa, Iowa City, IA USA
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Butowicz C, Yoder AJ, Hendershot BD, Gunterstockman B, Farrokhi S. Principal components analysis of postural sway in persons with unilateral lower limb amputation: A wearable sensor approach. J Biomech 2023; 158:111768. [PMID: 37625201 DOI: 10.1016/j.jbiomech.2023.111768] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2022] [Revised: 07/23/2023] [Accepted: 08/16/2023] [Indexed: 08/27/2023]
Abstract
Standing sway assessments can detect sensory imbalances which compromise postural control. Persons with lower limb amputation (LLA) often demonstrate impaired postural control, increasing fall risk. Here, principal features of postural sway were identified in persons with unilateral LLA using a single, commercially available wearable sensor. Sixty-one persons with LLA (n = 44 transtibial; n = 17 transfemoral) stood on a firm surface with eyes open/closed while wearing a single accelerometer mounted over the sacrum. Common parameters quantified spatiotemporal and spectral features of sway in anterior-posterior (AP) and mediolateral (ML) directions. Principal component (PC) dimensionality reduction was applied and loadings inspected to identify a reduced, non-redundant set among 14 original variables capturing 90 % variance. Six PCs described ≥ 90 % variance, with the first 3 explaining 75 %. With eyes open and closed, PC1 was loaded by variables characterizing trajectory planar size: area, jerk (i.e., sway smoothness), AP/ML RMS path distance, and AP/ML path range. With eyes open, PC2 was loaded by variables characterizing direction and spectral features: ellipse rotation, AP centroidal frequency, and ML jerk. With eyes closed, PC2 spectral loadings increased: ML centroidal frequency, ML frequency dispersion, and AP centroidal frequency. With eyes open, PC3 was loaded by ellipse rotation, jerk, ML velocity, ML centroidal frequency. With eyes closed, PC3 was loaded by ellipse rotation, ML centroidal frequency, ML frequency dispersion, and AP path velocity, characterizing off-axis error/corrections. RMS of path distance, ellipse rotation, centroidal frequency, frequency dispersion, path velocity, and jerk are a concise parameter set, derived from an accelerometer, to capture principal sway features in persons with LLA during standing balance with visual perturbations.
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Affiliation(s)
- Courtney Butowicz
- Research & Surveillance Division, Extremity Trauma and Amputation Center of Excellence, Defense Health Agency, Falls Church, VA 22042, United States; Department of Rehabilitation, Walter Reed National Military Medical Center, Bethesda, MD 20889, United States; Department of Physical Medicine & Rehabilitation, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, United States.
| | - Adam J Yoder
- Research & Surveillance Division, Extremity Trauma and Amputation Center of Excellence, Defense Health Agency, Falls Church, VA 22042, United States; Department of Physical & Occupational Therapy, Naval Medical Center, San Diego, CA 92134, United States
| | - Brad D Hendershot
- Research & Surveillance Division, Extremity Trauma and Amputation Center of Excellence, Defense Health Agency, Falls Church, VA 22042, United States; Department of Rehabilitation, Walter Reed National Military Medical Center, Bethesda, MD 20889, United States; Department of Physical Medicine & Rehabilitation, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, United States
| | - Brittney Gunterstockman
- Research & Surveillance Division, Extremity Trauma and Amputation Center of Excellence, Defense Health Agency, Falls Church, VA 22042, United States; Department of Physical & Occupational Therapy, Naval Medical Center, San Diego, CA 92134, United States; Department of Physical Therapy, Lincoln Memorial University, Knoxville, TN 37932, United States
| | - Shawn Farrokhi
- Research & Surveillance Division, Extremity Trauma and Amputation Center of Excellence, Defense Health Agency, Falls Church, VA 22042, United States; Department of Physical Medicine & Rehabilitation, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, United States; Department of Physical & Occupational Therapy, Naval Medical Center, San Diego, CA 92134, United States
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Mir N, Sen MS, Mani K, Sagar R, Arulselvi S, Kumar S, Gupta A, Sagar S. Impact of Yoga Intervention in Lower Limb Amputees following Trauma in Relation to Behavior and Quality of Life: A Randomized Controlled Trial. Int J Yoga 2023; 16:106-115. [PMID: 38204772 PMCID: PMC10775840 DOI: 10.4103/ijoy.ijoy_156_23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2023] [Revised: 09/14/2023] [Accepted: 09/14/2023] [Indexed: 01/12/2024] Open
Abstract
Background Yoga is an emerging intervention causing improvement in physical, mental, and spiritual well-being. Its role in improving outcomes in patients with amputation was investigated. Methodology Patients with traumatic lower limb amputation (n = 50) were enrolled and randomized to the Yoga group (n = 26) against control (n = 24). Sociodemographic details, quality of life (QOL) (World Health Organization QOL-BREF), Depression anxiety stress scale (DASS), Rosenberg self-esteem scale, and amputee body image score were applied at baseline, 6,-18 weeks of amputation. Results Sociodemographic and clinical variables were comparable between groups. At 18 weeks, the Yoga group had better QOL (P = 0.005) than the control group. Symptoms of depression (0.02) and anxiety (<0.001) reduced, and self-image (P = 0.015) improved significantly at 6 weeks, while stress (P = 0.003) reduced at 18 weeks in the yoga group. Despite comparable body image scores, the prosthesis usage (hours/day) was more (P = 0.005) in the Yoga (6.9 ± 3.2) group against the control (12 ± 2.7). Conclusion Yoga improves QOL and self-esteem and reduces depression, anxiety, and stress symptoms in patients with traumatic amputation.
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Affiliation(s)
- Nida Mir
- Division of Trauma Surgery and Critical Care, JPNATC, AIIMS, New Delhi, India
| | | | | | - Rajesh Sagar
- Department of Psychiatry, AIIMS, New Delhi, India
| | - S. Arulselvi
- Division of Trauma Surgery and Critical Care, JPNATC, AIIMS, New Delhi, India
| | - Subodh Kumar
- Division of Trauma Surgery and Critical Care, JPNATC, AIIMS, New Delhi, India
| | - Amit Gupta
- Division of Trauma Surgery and Critical Care, JPNATC, AIIMS, New Delhi, India
| | - Sushma Sagar
- Division of Trauma Surgery and Critical Care, JPNATC, AIIMS, New Delhi, India
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Chicos L, Rangaprakash D, Barry R, Herr H. Resting state neurophysiology of agonist-antagonist myoneural interface in persons with transtibial amputation. Res Sq 2023:rs.3.rs-2362961. [PMID: 36798194 PMCID: PMC9934762 DOI: 10.21203/rs.3.rs-2362961/v1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
Abstract
The agonist-antagonist myoneural interface (AMI) is a novel amputation surgery that preserves sensorimotor signaling mechanisms of the central-peripheral nervous systems. Our first neuroimaging study investigating AMI subjects (Srinivasan et al., Sci. Transl. Med. 2020) focused on task-based neural signatures, and showed evidence of proprioceptive feedback to the central nervous system. The study of resting state neural activity helps non-invasively characterize the neural patterns that prime task response. In this first study on resting state fMRI in AMI subjects, we compared resting state functional connectivity in patients with transtibial AMI (n=12) and traditional (n=7) amputations, as well as biologically intact control subjects (n=10). We hypothesized that the AMI surgery will induce functional network reorganization that significantly differs from the traditional amputation surgery and also more closely resembles the neural configuration of controls. We found AMI subjects to have lower connectivity with salience and motor seed regions compared to traditional amputees. Additionally, with connections affected in traditional amputees, AMI subjects exhibited a connectivity pattern more closely resembling controls. Lastly, sensorimotor connectivity in amputee cohorts was significantly associated with phantom sensation (R2=0.7, p=0.0008). These findings provide researchers and clinicians with a critical mechanistic understanding of the effects of the AMI surgery on the brain at rest, spearheading future research towards improved prosthetic control and embodiment.
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Affiliation(s)
| | | | - Robert Barry
- Massachusetts General Hospital & Harvard Medical School
| | - Hugh Herr
- Massachusetts Institute of Technology
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Lee SP, Farrokhi S, Kent JA, Ciccotelli J, Chien LC, Smith JA. Comparison of clinical and biomechanical characteristics between individuals with lower limb amputation with and without lower back pain: A systematic review and meta-analysis. Clin Biomech (Bristol, Avon) 2023; 101:105860. [PMID: 36549051 PMCID: PMC9892268 DOI: 10.1016/j.clinbiomech.2022.105860] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Revised: 11/22/2022] [Accepted: 12/12/2022] [Indexed: 12/15/2022]
Abstract
BACKGROUND Lower back pain is a debilitating condition common to individuals with lower limb amputation. It is unclear what risk factors contribute to the development of back pain. This study systematically reviewed and analyzed the available evidence regarding the clinical and biomechanical differences between individuals with amputation, with and without lower back pain. METHODS A literature search was conducted in PubMed, Web of Science, Scopus, and CINAHL databases in November 2020 and repeated in June 2021 and June 2022. Studies were included if they reported comparisons of demographic, anthropometric, biomechanical, and other clinical variables between participants with and without LBP. Study quality and potential for reporting bias were assessed. Meta-analyses were conducted to compare the two groups. FINDINGS Thirteen studies were included, with aggregated data from 436 participants (239 with LBP; 197 pain free). The median reporting quality score was 37.5%. The included studies enrolled participants who were predominantly male (mean = 91.4%, range = 77.8-100%) and with trauma-related amputation. Meta-analyses showed that individuals with LBP exhibited moderate (3.4 out of 10) but significantly greater pain than those without LBP. We found no between-group differences in age, height, weight, BMI, and time since amputation (p = 0.121-0.682). No significant differences in trunk/pelvic kinematics during gait were detected (p = 0.07-0.446) between the groups. INTERPRETATION Demographic, anthropometric, biomechanical, and simple clinical outcome variables may be insufficient for differentiating the risk of developing back pain after amputation. Investigators should be aware of the existing gender bias in sampling and methodological limitations, as well as to consider incorporating psychosocial measures when studying LBP in this clinical population.
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Affiliation(s)
- Szu-Ping Lee
- Department of Physical Therapy, University of Nevada, Las Vegas, NV, USA.
| | - Shawn Farrokhi
- Research and Surveillance Division, DoD-VA Extremity Trauma and Amputation Center of Excellence (EACE), San Antonio, TX, USA; Department of Physical and Occupational Therapy, Chiropractic Services and Sports Medicine, Naval Medical Center San Diego, San Diego, CA, USA
| | - Jenny A Kent
- Department of Physical Therapy, University of Nevada, Las Vegas, NV, USA
| | - Jason Ciccotelli
- Department of Physical Therapy, University of Nevada, Las Vegas, NV, USA
| | - Lung-Chang Chien
- Department of Epidemiology and Biostatistics, University of Nevada, Las Vegas, NV, USA
| | - Jo Armour Smith
- Department of Physical Therapy, Chapman University, Irvine, CA, USA
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10
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Wedge RD, Sup FC, Umberger BR. Metabolic cost of transport and stance time asymmetry in individuals with unilateral transtibial amputation using a passive prostheses while walking. Clin Biomech (Bristol, Avon) 2022; 94:105632. [PMID: 35364403 DOI: 10.1016/j.clinbiomech.2022.105632] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Revised: 03/16/2022] [Accepted: 03/22/2022] [Indexed: 02/07/2023]
Abstract
BACKGROUND People with unilateral amputation typically walk with greater metabolic cost than able-bodied individuals, while preferring asymmetric walking characteristics. It is unclear if asymmetric walking is energetically optimal and how metabolic cost accounts for asymmetric patterns in people with amputation. The purpose of this study was to determine the effects of stance-time asymmetry on the metabolic cost of transport. METHODS Fourteen participants (seven with amputation) completed two laboratory sessions where they walked on a treadmill while receiving real-time visual feedback about stance-time asymmetry. Expired gases were collected to determine the metabolic cost for a range of asymmetries (-15% to +15% in 5% increments, positive percentages represent more time on intact [dominant] limb). FINDINGS Participants with amputation walked with greater (P = 0.008) stance-time asymmetry (4.34 ± 1.09%) compared with able-bodied participants (0.94 ± 2.44%). Stance-time asymmetry had a significant effect on metabolic cost (P < 0.001). The asymmetries coinciding with the predicted minimum metabolic cost for people with (3.23 ± 2.90%) and without (1.81 ± 2.18%) amputation were not different from preferred asymmetries (P = 0.365; p = 0.513), respectively. The cost of symmetric walking was 13.6% greater than near preferred walking for people with amputation (5% more time on intact limb). INTERPRETATION Metabolic cost is not the only objective of walking, but like able-bodied individuals, it may influence how people with amputation walk. Rehabilitation typically tries to restore inter-limb symmetry after an injury, yet if the limbs are asymmetric, symmetric gait may not be optimal with current assistive devices.
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Affiliation(s)
- Ryan D Wedge
- Department of Kinesiology, School of Public Health and Health Sciences, University of Massachusetts Amherst, 30 Eastman Lane, 110 Totman Building, Amherst, MA 01003-9258, United States; Motion Analysis Laboratory, Quinnipiac University, 275 Mount Carmel Avenue, Hamden, CT 06518, United States; Department of Physical Therapy, Health Sciences Building, East Carolina University, 600 Moye Blvd, Greenville, NC 27834, United States.
| | - Frank C Sup
- Department of Mechanical and Industrial Engineering, University of Massachusetts Amherst, 120 E Marston Hall, 160 Governor's Drive, Amherst, MA 01003-2210, United States.
| | - Brian R Umberger
- Department of Kinesiology, School of Public Health and Health Sciences, University of Massachusetts Amherst, 30 Eastman Lane, 110 Totman Building, Amherst, MA 01003-9258, United States; School of Kinesiology, University of Michigan, SKB 1210, 830 North University, Ann Arbor, MI 48109-1048, United States.
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11
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Miller RH, Russell Esposito E. Transtibial limb loss does not increase metabolic cost in three-dimensional computer simulations of human walking. PeerJ 2021; 9:e11960. [PMID: 34430088 PMCID: PMC8349165 DOI: 10.7717/peerj.11960] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Accepted: 07/21/2021] [Indexed: 11/20/2022] Open
Abstract
Loss of a lower limb below the knee, i.e., transtibial limb loss, and subsequently walking with a prosthesis, is generally thought to increase the metabolic cost of walking vs. able-bodied controls. However, high-functioning individuals with limb loss such as military service members often walk with the same metabolic cost as controls. Here we used a 3-D computer model and optimal control simulation approach to test the hypothesis that transtibial limb loss in and of itself causes an increase in metabolic cost of walking. We first generated N = 36 simulations of walking at 1.45 m/s using a “pre-limb loss” model, with two intact biological legs, that minimized deviations from able-bodied experimental walking mechanics with minimum muscular effort. We then repeated these simulations using a “post-limb loss” model, with the right leg’s ankle muscles and joints replaced with a simple model of a passive transtibial prosthesis. No other changes were made to the post-limb loss model’s remaining muscles or musculoskeletal parameters compared to the pre-limb loss case. Post-limb loss, the gait deviations on average increased by only 0.17 standard deviations from the experimental means, and metabolic cost did not increase (3.58 ± 0.10 J/m/kg pre-limb loss vs. 3.59 ± 0.12 J/m/kg post-limb loss, p = 0.65). The results suggest that transtibial limb loss does not directly lead to an increase in metabolic cost, even when deviations from able-bodied gait mechanics are minimized. High metabolic costs observed in individuals with transtibial limb loss may be due to secondary changes in strength or general fitness after limb loss, modifiable prosthesis issues, or to prioritization of factors that affect locomotor control other than gait deviations and muscular effort.
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Affiliation(s)
- Ross H Miller
- Department of Kinesiology, University of Maryland, College Park, MD, United States of America.,Neuroscience and Cognitive Science Program, University of Maryland, College Park, MD, United States of America
| | - Elizabeth Russell Esposito
- Extremity Trauma and Amputation Center of Excellence, Fort Sam Houston, TX, United States of America.,Center for Limb Loss and Mobility, Seattle, WA, United States of America.,Department of Mechanical Engineering, University of Washington, Seattle, WA, United States of America
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12
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Abstract
Despite the numerous prosthetic hand designs that are commercially available, people with upper limb loss still frequently report dissatisfaction and abandonment. Over the past decade there have been numerous advances in prosthetic design, control, sensation, and device attachment. Each offers the potential to enhance function and satisfaction, but most come at high costs and involve surgical risks. Here, we discuss potential barriers and solutions to promote the widespread use of novel prosthetic technology. With appropriate reimbursement, multidisciplinary care teams, device-specific rehabilitation, and patient and clinician education, such technology has the potential to revolutionize the field and improve patient outcomes.
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Affiliation(s)
- Deanna H Gates
- School of Kinesiology, University of Michigan, 830 N. University Avenue, Ann Arbor, MI 48109, USA.
| | - Susannah M Engdahl
- Department of Bioengineering, George Mason University, 4400 University Drive, MS 1J7, Fairfax, VA 22030, USA
| | - Alicia Davis
- University of Michigan Orthotics and Prosthetics Center, 2850 South Industrial Highway, Suite 400, Ann Arbor, MI 48104, USA
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13
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Dash S, Arumugam PK, Muthukumar V, Kumath M, Sharma S. Study of clinical pattern of limb loss in electrical burn injuries. Injury 2021; 52:1925-1933. [PMID: 33902868 DOI: 10.1016/j.injury.2021.04.028] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/13/2021] [Revised: 03/30/2021] [Accepted: 04/06/2021] [Indexed: 02/02/2023]
Abstract
INTRODUCTION Electrical burn injuries are devastating and cause not only loss of life but also severe disabilities in the form of limb loss. Increase in urbanization, industrialization and overcrowding has led to an increase in electric injuries. MATERIAL AND METHODS The study was prospective in nature evaluating electric burns and studied the pattern of limb loss for a duration of 18 months from October 2016 to March 2018. Parameters recorded were demographic data, clinical data regarding the electrical injuries, complications, and outcomes. RESULTS Male patients made up 85.3% of cases. Mean TBSA was 24.76 ± 19.18%. Mean age was 27.59 ± 13.73 years. Pediatric patients made up 17%. High voltage burns constituted 68.2 %. Electric contact burn was the most common type making up 49.5% of cases. The most common cause was occupational (38.9%). A fasciotomy was required in 22% of cases with an amputation rate of 38% (209 out of 550). There were 190 major amputations and 106 minor amputations. Overall, the right upper limb amputations were twice as common as the left. The ratio of upper limb: lower limb amputation was 4:1. Fifty patients (23.9%) required revision amputation. The age group 11 to 30 years made up 55.5% of amputations. There was no statistical difference in amputation rates between males (31.31%) and females (41.97%). In patients with TBSA less than 25% amputation rate was 47.77% as compared to patients with more than 25% TBSA, 19.47% (p<0.001). Most amputations occurred due to electric contact burns (74.16%). In the high voltage group, 46.1% underwent amputation vs low voltage group -20.6% (p<0.001). Overall mortality rate was 12.7%. Three hundred patients (55%) had low level of awareness regarding consequences of electric injury. Thirty one percent had medium level of awareness and only 14 % had high level of awareness. There was a significant correlation between education level and awareness in adult patients (p<0.001). Seventy percent of persons with occupational injuries used only footwear and no other protective equipment. CONCLUSION Increasing public awareness, safety measures at workplaces are measures that will help reducing electrical burns which reduce limb and life loss.
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Affiliation(s)
- Suvashis Dash
- Department of Burns, Plastic & Maxillofacial Surgery, VM Medical College & Safdarjung Hospital, New Delhi.
| | - Praveen Kumar Arumugam
- Department of Burns, Plastic & Maxillofacial Surgery, VM Medical College & Safdarjung Hospital, New Delhi.
| | - Vamseedharan Muthukumar
- Department of Burns, Plastic & Maxillofacial Surgery, VM Medical College & Safdarjung Hospital, New Delhi.
| | - Manish Kumath
- Dept. of Forensic Medicine, V.M. Medical College & Safdarjung Hospital, New Delhi, 110029, India.
| | - Shardendu Sharma
- Department of Burns, Plastic & Maxillofacial Surgery, VM Medical College & Safdarjung Hospital, New Delhi
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14
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van den Boom M, Miller KJ, Gregg NM, Ojeda Valencia G, Lee KH, Richner TJ, Ramsey NF, Worrell GA, Hermes D. Typical somatomotor physiology of the hand is preserved in a patient with an amputated arm: An ECoG case study. Neuroimage Clin 2021; 31:102728. [PMID: 34182408 PMCID: PMC8253998 DOI: 10.1016/j.nicl.2021.102728] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Revised: 04/17/2021] [Accepted: 05/10/2021] [Indexed: 12/03/2022]
Abstract
Electrophysiological signals in the human motor system may change in different ways after deafferentation, with some studies emphasizing reorganization while others propose retained physiology. Understanding whether motor electrophysiology is retained over longer periods of time can be invaluable for patients with paralysis (e.g. ALS or brainstem stroke) when signals from sensorimotor areas may be used for communication or control over neural prosthetic devices. In addition, a maintained electrophysiology can potentially benefit the treatment of phantom limb pains through prolonged use of these signals in a brain-machine interface (BCI). Here, we were presented with the unique opportunity to investigate the physiology of the sensorimotor cortex in a patient with an amputated arm using electrocorticographic (ECoG) measurements. While implanted with an ECoG grid for clinical evaluation of electrical stimulation for phantom limb pain, the patient performed attempted finger movements with the contralateral (lost) hand and executed finger movements with the ipsilateral (healthy) hand. The electrophysiology of the sensorimotor cortex contralateral to the amputated hand remained very similar to that of hand movement in healthy people, with a spatially focused increase of high-frequency band (65-175 Hz; HFB) power over the hand region and a distributed decrease in low-frequency band (15-28 Hz; LFB) power. The representation of the three different fingers (thumb, index and little) remained intact and HFB patterns could be decoded using support vector learning at single-trial classification accuracies of >90%, based on the first 1-3 s of the HFB response. These results indicate that hand representations are largely retained in the motor cortex. The intact physiological response of the amputated hand, the high distinguishability of the fingers and fast temporal peak are encouraging for neural prosthetic devices that target the sensorimotor cortex.
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Affiliation(s)
- Max van den Boom
- Department of Physiology and Biomedical Engineering, Mayo Clinic Mayo Clinic, 200 First Street SW, Rochester, MN 55905, USA; Department of Neurology & Neurosurgery, UMC Utrecht Brain Center, University Medical Center Utrecht, Heidelberglaan 100, 3584 CX Utrecht, The Netherlands.
| | - Kai J Miller
- Department of Neurosurgery, Mayo Clinic Mayo Clinic, 200 First Street SW, Rochester, MN 55905, USA
| | - Nicholas M Gregg
- Department of Neurology, Mayo Clinic Mayo Clinic, 200 First Street SW, Rochester, MN 55905, USA
| | - Gabriela Ojeda Valencia
- Department of Physiology and Biomedical Engineering, Mayo Clinic Mayo Clinic, 200 First Street SW, Rochester, MN 55905, USA
| | - Kendall H Lee
- Department of Neurosurgery, Mayo Clinic Mayo Clinic, 200 First Street SW, Rochester, MN 55905, USA
| | - Thomas J Richner
- Department of Neurosurgery, Mayo Clinic Mayo Clinic, 200 First Street SW, Rochester, MN 55905, USA
| | - Nick F Ramsey
- Department of Neurology & Neurosurgery, UMC Utrecht Brain Center, University Medical Center Utrecht, Heidelberglaan 100, 3584 CX Utrecht, The Netherlands
| | - Greg A Worrell
- Department of Neurology, Mayo Clinic Mayo Clinic, 200 First Street SW, Rochester, MN 55905, USA
| | - Dora Hermes
- Department of Physiology and Biomedical Engineering, Mayo Clinic Mayo Clinic, 200 First Street SW, Rochester, MN 55905, USA.
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15
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Kim J, Gardinier ES, Vempala V, Gates DH. The effect of powered ankle prostheses on muscle activity during walking. J Biomech 2021; 124:110573. [PMID: 34153660 DOI: 10.1016/j.jbiomech.2021.110573] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2020] [Revised: 03/12/2021] [Accepted: 06/07/2021] [Indexed: 11/25/2022]
Abstract
Individuals with transtibial amputation (TTA) walk with greater muscle activity and metabolic costs than non-amputees. Powered prostheses aim to address these deficits by replicating the active function of the biological ankle. The purpose of this study was to determine if people with TTA alter muscle activity when walking with a powered prosthesis, and if this change relates to changes in metabolic costs. Ten individuals with TTA and 10 non-amputees walked on a treadmill while we measured metabolic cost and muscle activity from 16 lower limb muscles. Participants with TTA walked with their prescribed unpowered prosthesis and a commercial powered prosthesis (BiOM T2, Bedford, MA, USA), in random order. The integrated EMG across the gait cycle was greater with the powered prosthesis for the intact limb gluteus medius (p = 0.002) and residual limb vastus medialis (p = 0.013). There were several non-significant, moderate-to-strong correlations between changes in muscle activity and changes in metabolic cost between prostheses (p > 0.0504). Decreased muscle activity in the residual limb gluteus medius correlated with lower metabolic cost (r = 0.543). In contrast, lower metabolic cost was correlated with increased residual limb rectus femoris activity (r = -0.627) and increased co-contractions in the residual limb thigh muscles in terminal stance (r = -0.585) and late swing (r = -0.754). Overall, there were no consistent changes in muscle activity in response to the powered prosthesis. The correlations suggest that individuals who can effectively stabilize their residual limb during stance are more likely to benefit metabolically.
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Affiliation(s)
- Jay Kim
- School of Kinesiology, University of Michigan, Ann Arbor, MI, USA; Department of Mechanical Engineering, University of Michigan, Ann Arbor, MI, USA
| | | | - Vibha Vempala
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI, USA
| | - Deanna H Gates
- School of Kinesiology, University of Michigan, Ann Arbor, MI, USA; Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI, USA.
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16
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Pfeiffenberger JA, Hsieh ST. Autotomy-induced effects on the locomotor performance of the ghost crab Ocypode quadrata. J Exp Biol 2021; 224:238065. [PMID: 33785503 DOI: 10.1242/jeb.233536] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Accepted: 03/23/2021] [Indexed: 02/02/2023]
Abstract
The voluntary amputation of an appendage, or autotomy, is an effective defensive mechanism that allows an animal to escape aggressive interactions. However, animals may suffer long-term costs that can reduce their overall fitness. Atlantic ghost crabs (Ocypode quadrata) are one of the fastest terrestrial invertebrates, and regularly lose one or more limbs in response to an antagonist encounter. When running laterally at fast speeds, they adopt a quadrupedal gait using their first and second pairs of legs while raising their fourth, and sometimes the third, pair of legs off the ground. This suggests that some limbs may be more important for achieving maximal locomotor performance than others. The goal of this study was to determine whether the loss of certain limbs would affect running performance more than others, and what compensatory strategies were used. Crabs were assigned to four different paired limb removal treatments or the control group and run on an enclosed trackway in their natural habitat. Ghost crabs were found to adjust stride kinematics in response to limb loss. Loss of the second or third limb pairs caused a reduction in running speed by about 25%, suggesting that the remaining intact limbs were unable to compensate for the loss of either limb, either due to a lack of propulsive forces produced by these limbs or issues stemming from re-coupling limb arrangements. Loss of any of the other limbs had no detectable effect on running speed. We conclude that compensatory ability varies depending on the limb that is lost.
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Affiliation(s)
| | - S Tonia Hsieh
- Department of Biology, Temple University, Philadelphia, PA 19122, USA
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17
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George BG, Pruziner AL, Andrews AM. Circumference Method Estimates Percent Body Fat in Male US Service Members with Lower Limb Loss. J Acad Nutr Diet 2021; 121:1327-1334. [PMID: 33744234 DOI: 10.1016/j.jand.2021.02.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Revised: 01/30/2021] [Accepted: 02/07/2021] [Indexed: 10/21/2022]
Abstract
BACKGROUND The Department of Defense circumference method (CM) is used to estimate percent body fat (%BF) in evaluation of health, physical fitness, appearance, and military readiness; however, the CM has not been validated in individuals with lower limb loss. OBJECTIVE To evaluate the agreement between CM and dual-energy X-ray absorptiometry (DXA) for measuring %BF in individuals with lower limb loss. DESIGN This study is part of a larger cross-sectional comparison study, and this analysis was included as a secondary objective. Two methods of measuring %BF included CM and DXA, with DXA as the reference standard for this study. PARTICIPANTS/SETTING This study was conducted at Walter Reed Army Medical Center. Data were collected from summer 2010 to summer 2011. One hundred individuals, 50 with and 50 without lower limb loss, were screened for this study; three individuals with limb loss and two without limb loss had incomplete data, and one individual (female, without limb loss) lacked a comparison participant. All participants were recruited from a military medical center, and data were collected in a clinic research laboratory. MAIN OUTCOME MEASURES Measurements of %BF were compared between methods for each group. STATISTICAL ANALYSES PERFORMED Measurements of %BF were compared using paired t-tests and intraclass correlation coefficient. Agreement and bias were assessed with Bland-Altman analysis. Receiver operating characteristic analysis was used to determine the diagnostic accuracy of the CM to identify participants with %BF levels in the obese category (≥25%). RESULTS A statistically significant difference was found between %BF methods in the group with limb loss (1.7%; P = 0.001) and the group without limb loss (1.4%; P = 0.005), with DXA consistently higher than CM. However, the intraclass correlation coefficient estimates for the agreement between %BF by CM and DXA were 0.848 (95% confidence interval [CI]: 0.683-0.922; P < 0.001) and 0.828 (CI: 0.679-0.906; P < 0.001), for the groups with and without limb loss, respectively, suggesting that CM has good to near excellent agreement with DXA for estimating %BF in these groups. Receiver operating characteristic analysis indicated that the area under the curve supported predictive ability to detect obesity-based %BF in males with and without limb loss. CONCLUSIONS Although a statistically significant difference was found between methods for individuals with limb loss, there was also good agreement between the methods, suggesting that CM may be a useful tool for estimating %BF in individuals with lower limb loss. The CM may be a useful and field expedient method for assessing %BF in a clinical setting when DXA is not available.
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Bertrand C, Saulnier PJ, Potier L, Croyal M, Blanchard V, Gand E, Ragot S, Schneider F, Bocock O, Baillet-Blanco L, Velho G, Marre M, Roussel R, Rigalleau V, Hadjadj S, Mohammedi K. Plasma concentrations of lipoproteins and risk of lower-limb peripheral artery disease in people with type 2 diabetes: the SURDIAGENE study. Diabetologia 2021; 64:668-680. [PMID: 33409569 DOI: 10.1007/s00125-020-05326-x] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Accepted: 09/09/2020] [Indexed: 12/16/2022]
Abstract
AIMS/HYPOTHESIS The lipid profile has not been fully investigated in individuals with peripheral artery disease (PAD). We aimed to evaluate the relationship between plasma concentrations of lipoproteins and the prevalence of lower-limb PAD at baseline and its incidence during follow-up in people with type 2 diabetes. METHODS Plasma concentrations of total cholesterol, HDL-cholesterol, triacylglycerol and apolipoprotein (Apo) A-I, ApoA-II, ApoB-100 and Apo(a) were measured at baseline using colorimetric or MS methods in the SURDIAGENE cohort. Total cholesterol/HDL-cholesterol ratio, non-HDL-cholesterol and LDL-cholesterol were estimated using computation formulas. Logistic and Cox proportional hazard regression models were fitted to estimate OR or HR, with related 95% CI, for baseline prevalence or incidence of major PAD (lower-limb amputation or requirement of revascularisation) during follow-up by increasing lipoprotein tertiles, after adjustment for key confounders. RESULTS Among 1468 participants (women 42%, mean ± SD age 65 ± 11 years, duration of diabetes 14 ± 10 years at baseline), 129 (8.8%) had a baseline history of major PAD. Major PAD was less prevalent at baseline in the highest (vs lowest) tertile of HDL-cholesterol (OR 0.42 [95% CI 0.26, 0.71], p = 0.001) and ApoA-I (OR 0.39 [95% CI 0.23, 0.67], p = 0.0007), and more frequent in the highest tertile of total cholesterol/HDL-cholesterol ratio (OR 1.95 [95% CI 1.18, 3.24], p = 0.01). Among 1339 participants without a history of PAD at baseline, incident PAD occurred in 97 (7.2%) during a median (25th-75th percentile) duration of follow-up of 7.1 (4.4-10.7) years, corresponding to 9685 person-years and an incidence rate of 9.8 (95% CI 8.0, 12.0) per 1000 person-years. The risk of incident PAD was lower in the top (vs bottom) tertile of HDL-cholesterol (HR 0.54 [95% CI 0.30, 0.95], p = 0.03) or ApoA-I (HR 0.50 [95% CI 0.28, 0.86], p = 0.01) and higher in the top tertile of total cholesterol/HDL-cholesterol ratio (HR 2.81 [95% CI 1.61, 5.04], p = 0.0002) and non-HDL-cholesterol (HR 1.80 [95% CI 1.06, 3.12], p = 0.03). CONCLUSIONS/INTERPRETATION We reported independent associations between HDL-cholesterol, ApoA-I, total cholesterol/HDL-cholesterol ratio or non-HDL-cholesterol and the prevalence or the incidence of major PAD in people with type 2 diabetes. Our findings provide a picture of lipoprotein profile in people with type 2 diabetes. Graphical abstract.
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Affiliation(s)
- Capucine Bertrand
- Département d'Endocrinologie, Diabétologie, Nutrition, Hôpital Haut-Lévêque, Pessac, Bordeaux, France
| | - Pierre-Jean Saulnier
- UFR de Médecine et Pharmacie, Université de Poitiers, Poitiers, France
- CHU de Poitiers, Centre d'Investigation Clinique, Poitiers, France
- Inserm, CIC 1402, Poitiers, France
| | - Louis Potier
- Assistance Publique - Hôpitaux de Paris, Bichat Hospital, DHU FIRE, Département d'Endocrinologie, Diabétologie, Nutrition, Paris, France
- UFR de Médecine, Université de Paris, Paris, France
- Centre de Recherche des Cordeliers, Inserm, Sorbonne Université, Université de Paris, Paris, France
| | - Mikaël Croyal
- INRA, CHU Nantes, UMR 1280, PhAN, IMAD, Nantes Université, Nantes, France
- CRNH-O, Mass Spectrometry Core Facility, Nantes, France
| | | | - Elise Gand
- CHU de Poitiers, Centre d'Investigation Clinique, Poitiers, France
| | - Stéphanie Ragot
- UFR de Médecine et Pharmacie, Université de Poitiers, Poitiers, France
- CHU de Poitiers, Centre d'Investigation Clinique, Poitiers, France
- Inserm, CIC 1402, Poitiers, France
| | - Fabrice Schneider
- UFR de Médecine et Pharmacie, Université de Poitiers, Poitiers, France
- Département de Chirurgie Vasculaire, CHU de Poitiers, Poitiers, France
| | - Olivia Bocock
- Département d'Endocrinologie, Diabétologie, Nutrition, Hôpital Haut-Lévêque, Pessac, Bordeaux, France
| | - Laurence Baillet-Blanco
- Département d'Endocrinologie, Diabétologie, Nutrition, Hôpital Haut-Lévêque, Pessac, Bordeaux, France
| | - Gilberto Velho
- Centre de Recherche des Cordeliers, Inserm, Sorbonne Université, Université de Paris, Paris, France
| | - Michel Marre
- UFR de Médecine, Université de Paris, Paris, France
- Centre de Recherche des Cordeliers, Inserm, Sorbonne Université, Université de Paris, Paris, France
- CMC Ambroise Paré, Neuilly-sur-Seine, France
| | - Ronan Roussel
- Assistance Publique - Hôpitaux de Paris, Bichat Hospital, DHU FIRE, Département d'Endocrinologie, Diabétologie, Nutrition, Paris, France
- UFR de Médecine, Université de Paris, Paris, France
- Centre de Recherche des Cordeliers, Inserm, Sorbonne Université, Université de Paris, Paris, France
| | - Vincent Rigalleau
- Département d'Endocrinologie, Diabétologie, Nutrition, Hôpital Haut-Lévêque, Pessac, Bordeaux, France
- UFR de Médecine, Université de Bordeaux, Bordeaux, France
- Centre de Recherche Inserm - Université de Bordeaux U1219 'Bordeaux Population Health', Bordeaux, France
| | - Samy Hadjadj
- Institut du Thorax, Inserm, CNRS, Université de Nantes, Nantes, France
| | - Kamel Mohammedi
- Département d'Endocrinologie, Diabétologie, Nutrition, Hôpital Haut-Lévêque, Pessac, Bordeaux, France.
- CMC Ambroise Paré, Neuilly-sur-Seine, France.
- Inserm U1034, Biologie des Maladies Cardiovasculaires, Bordeaux, France.
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Clemens S, Doerger C, Lee SP. Current and Emerging Trends in the Management of Fall Risk in People with Lower Limb Amputation. Curr Geriatr Rep 2020; 9:134-41. [PMID: 34790518 DOI: 10.1007/s13670-020-00328-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Purpose of Review People living with lower limb amputation are at an increased risk of falling compared with the healthy geriatric population. Factors of increased age and increased number of comorbidities could compound the already increased risk. The purpose of this article is to highlight recent research associated with fall risk in amputees and provide the reader with evidence to help guide clinical interventions. Recent Findings Though research on the topic of falls in people with amputation is becoming more common, there is still a dearth of evidence regarding what contributes to increased fall risk and how to address it in this population. There are recent studies that have examined therapy and prosthetic interventions that could mitigate fall risk in people with amputation, yet there is not enough evidence to develop a consensus on the topic. More research is required to determine what contributes to increased fall rates in people with amputation, and what detriments to an amputee's function or psyche may result after incurring a fall. Summary Borrowing from what is known about geriatric fall risk and combining the information with novel and existing approaches to fall mitigation in amputees can offer clinicians the opportunity to develop evidence-based programs to address fall risk in their patients with lower limb amputation.
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Abstract
PURPOSE OF REVIEW The complexity of the human extremity, particularly the upper extremity and the hand, allows us to interact with the world. Prosthetists have struggled to recreate the intuitive motor control, light touch sensation, and proprioception of the innate limb in a manner that reflects the complexity of its native form and function. Nevertheless, recent advances in prosthesis technology, surgical innovations, and enhanced rehabilitation appear promising for patients with limb loss who hope to return to their pre-injury level of function. The purpose of this review is to illustrate recent technological advances that are moving us one step closer to the goal of multi-functional, self-identifiable, durable, and intuitive prostheses. RECENT FINDINGS Surgical advances such as targeted muscle reinnervation, regenerative peripheral nerve interfaces, agonist-antagonist myoneural interfaces, and targeted sensory reinnervation; development of technology designed to restore sensation, such as implanted sensors and haptic devices; and evolution of osseointegrated (bone-anchored) prostheses show great promise. Augmented and virtual reality platforms have the potential to enhance prosthesis design, pre-prosthetic training, incorporation, and use. Emerging technologies move surgeons, rehabilitation physicians, therapists, and prosthetists closer to the goal of creating highly functional prostheses with elevated sensory and motor control. Collaboration between medical teams, scientists, and industry stakeholders will be required to keep pace with patients who require durable, high-functioning prostheses.
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Affiliation(s)
- Taylor J Bates
- Department of Orthopaedics, San Antonio Military Medical Center, 3551 Roger Brooke Drive, JBSA-Ft Sam Houston, TX, 78234, USA
| | - John R Fergason
- Center for the Intrepid, San Antonio Military Medical Center, Fort Sam Houston, JBSA-Ft Sam Houston, TX, USA
| | - Sarah N Pierrie
- Department of Orthopaedics, San Antonio Military Medical Center, 3551 Roger Brooke Drive, JBSA-Ft Sam Houston, TX, 78234, USA.
- Center for the Intrepid, San Antonio Military Medical Center, Fort Sam Houston, JBSA-Ft Sam Houston, TX, USA.
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Mitchell S, Andrews L, Engward H. Examining the effects of acquired limb loss on the family network: a grounded theory study. Disabil Rehabil 2020; 44:745-753. [PMID: 32567378 DOI: 10.1080/09638288.2020.1780480] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Background: Individuals with acquired limb loss are faced with various challenges. Family networks become important in facilitating coping and recovery, but the limited research into their own experiences has so far only examined spousal and parental carers.Aims: This research aimed to: understand the experiences of acquired limb loss from the perspective of the family network; and to develop a theoretical model to explain how they experience limb loss of the other. The use of 'network' was adopted to include kin self-identified as family.Method: Participants (n = 14) were recruited nationally. Interviews were conducted in a process moving from unstructured, semi-structured and structured interviews, using Grounded Theory method.Findings: A theoretical model was developed around the interaction of five core categories. Families witness the difficulties faced by the person with limb loss, leading to a responsibility to provide support. Families subsequently experience various challenges of limb loss; together with numerous emotional reactions. Various forms of coping are used in order to resolve these experiences.Conclusions: Families are involved in the processes and challenges of an amputation in another family member, regardless of aetiology, gender or relationship structure. The theoretical model can be understood through the integration of existing research. The issues identified indicate potential considerations for services supporting such families.IMPLICATIONS FOR REHABILITATIONThe challenges and emotions experienced by family members have potential consequences for the support offered to the person with limb loss.This could ultimately influence the physical and psychological rehabilitation of the person with limb loss.Services should support families in witnessing difficulties in the person with limb loss, adjusting to relational changes and managing health care systems.
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Affiliation(s)
- Sophie Mitchell
- School of Health and Social Care, University of Essex, Colchester, UK
| | - Leanne Andrews
- School of Health and Social Care, University of Essex, Colchester, UK
| | - Hilary Engward
- Veterans and Families Institute, Anglia Ruskin University, Chelmsford, UK
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Howard C, Saraswat D, McLeod G, Yeung A, Jeong D, Lam J. Canada's Prosthetic Coverage: a Review of Provincial Prosthetic Policy. Can Prosthet Orthot J 2020; 2:33489. [PMID: 37614768 PMCID: PMC10443461 DOI: 10.33137/cpoj.v2i2.33489] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2019] [Accepted: 02/12/2020] [Indexed: 11/23/2022] Open
Abstract
The Canadian healthcare system serves as an example of equity and federal service to citizens across the world. However, it is not without its challenges. Prosthetic coverage across Canada is highly variable and largely unable to provide equal coverage for Canadian persons living with amputation. Many persons with limb loss are forced to rely upon personal resources, fundraising, or the charity of non-governmental organizations in order to meet this basic healthcare need. This disparity in the Canadian healthcare system is unusual and largely undescribed in the literature. We thus explore the nature of Canadian healthcare prosthetic coverage across Canada, investigating the variability in coverage, presence of prosthetic coverage policies, clarity of policy, eligibility criteria, and interval of prosthetic replacement. Our findings highlight potential areas for improvement within current Canadian healthcare policy.
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Affiliation(s)
- C.W. Howard
- Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - D.K. Saraswat
- Faculty of Medicine & Dentistry, University of Alberta, Edmonton, Alberta, Canada
| | - G McLeod
- Max Rady College of Medicine, University of Manitoba, Winnipeg, Manitoba, Canada
| | - A Yeung
- Max Rady College of Medicine, University of Manitoba, Winnipeg, Manitoba, Canada
| | - D Jeong
- Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada
| | - J Lam
- Faculty of Medicine, McGill University, Montreal, Québec, Canada
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Wolf EJ, Cruz TH, Emondi AA, Langhals NB, Naufel S, Peng GCY, Schulz BW, Wolfson M. Advanced technologies for intuitive control and sensation of prosthetics. Biomed Eng Lett 2020; 10:119-128. [PMID: 32175133 PMCID: PMC7046895 DOI: 10.1007/s13534-019-00127-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2019] [Accepted: 07/31/2019] [Indexed: 02/06/2023] Open
Abstract
The Department of Defense, Department of Veterans Affairs and National Institutes of Health have invested significantly in advancing prosthetic technologies over the past 25 years, with the overall intent to improve the function, participation and quality of life of Service Members, Veterans, and all United States Citizens living with limb loss. These investments have contributed to substantial advancements in the control and sensory perception of prosthetic devices over the past decade. While control of motorized prosthetic devices through the use of electromyography has been widely available since the 1980s, this technology is not intuitive. Additionally, these systems do not provide stimulation for sensory perception. Recent research has made significant advancement not only in the intuitive use of electromyography for control but also in the ability to provide relevant meaningful perceptions through various stimulation approaches. While much of this previous work has traditionally focused on those with upper extremity amputation, new developments include advanced bidirectional neuroprostheses that are applicable to both the upper and lower limb amputation. The goal of this review is to examine the state-of-the-science in the areas of intuitive control and sensation of prosthetic devices and to discuss areas of exploration for the future. Current research and development efforts in external systems, implanted systems, surgical approaches, and regenerative approaches will be explored.
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Affiliation(s)
- Erik J. Wolf
- Clinical and Rehabilitative Medicine Research Program, US Army Medical Research and Development Command, Fort Detrick, MD 21702 USA
| | - Theresa H. Cruz
- National Institute of Child Health and Human Development, National Institute of Health, Bethesda, MD 20817 USA
| | - Alfred A. Emondi
- Defense Advanced Research Projects Agency, Arlington, VA 22203 USA
| | - Nicholas B. Langhals
- National Institute of Neurological Disorders and Stroke, National Institute of Health, Bethesda, MD 20892 USA
| | | | - Grace C. Y. Peng
- National Institute of Biomedical Imaging and Bioengineering, National Institute of Health, Bethesda, MD 20817 USA
| | - Brian W. Schulz
- VA Office of Research and Development, Washington, DC 20002 USA
| | - Michael Wolfson
- National Institute of Biomedical Imaging and Bioengineering, National Institute of Health, Bethesda, MD 20817 USA
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Wong CK, Chihuri ST, Santo EG, White RA. Relevance of medical comorbidities for functional mobility in people with limb loss: retrospective explanatory models for a clinical walking measure and a patient-reported functional outcome. Physiotherapy 2020; 107:133-141. [PMID: 32026813 DOI: 10.1016/j.physio.2020.01.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2019] [Indexed: 01/22/2023]
Abstract
OBJECTIVES Various modifiable and non-modifiable factors affect functional mobility, but subjective patient-reported and objective performance-based measures are rarely combined in explanatory analyses of functional mobility in people with limb loss. This study determined separate explanatory models for patient-reported function using the Prosthetic Evaluation Questionnaire Mobility Subscale (PEQ-MS), and performance-based 2-Minute Walk Test (2MWT). DESIGN Retrospective cross-sectional observational analysis. SETTING Wellness-walking program. PARTICIPANTS Three hundred five volunteers with lower limb loss participated. Sixty nine percent were men, mean age 56 (15) years. Fifty two percent had vascular amputation causes, 42% had surgical levels above the knee, and 82% had medical comorbidities. Walking levels included limited-household (21%), limited-community (30%), and independent-community (49%). Outcome measures included patient-reported PEQ-MS, Activities-specific Balance Confidence (ABC) and Houghton scales; and performance-based balance and walking. MAIN OUTCOMES Separate PEQ-MS and 2MWT multiple regression models fit using backward deletion. RESULTS Modifiable (balance ability, ABC, Houghton score; P<0.05) and non-modifiable factors (sex, amputation cause, surgical level; P<0.05) explained the variance in 2MWT (adjusted R2=0.685). Patient-reported and performance-based modifiable factors (Houghton score, 2MWT; P<0.001) explained PEQ-MS variance (adjusted R2=0.660). Integumentary (P=0.022) and cardiopulmonary (P<0.001) comorbidities explained an additional 4% of PEQ-MS variance, while surgical level was insignificant. CONCLUSIONS Both modifiable and non-modifiable factors explained prosthetic functional mobility. Performance-based walking was explained by modifiable factors including balance ability and confidence, prosthesis and walking aid use. Patient-reported function was also explained by prosthesis and walking aid use, walking speed and medical comorbidities. Modifiable factors for objective and subjective prosthetic mobility may provide a clinical roadmap for rehabilitation.
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Affiliation(s)
- Christopher K Wong
- Department of Rehabilitation and Regenerative Medicine, Columbia University Irving Medical Center, 617 West 168th Street, Georgian #311, New York, 10032 NY, USA.
| | - Stanford T Chihuri
- Center for Injury Epidemiology and Prevention, Columbia University Irving Medical Center, New York, NY, USA
| | - Elizabeth G Santo
- Program in Physical Therapy, College of Physicians and Surgeons, Columbia University, New York, NY, USA
| | - Ryan A White
- Program in Physical Therapy, College of Physicians and Surgeons, Columbia University, New York, NY, USA
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25
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Butowicz CM, Krupenevich RL, Acasio JC, Dearth CL, Hendershot BD. Relationships between mediolateral trunk-pelvic motion, hip strength, and knee joint moments during gait among persons with lower limb amputation. Clin Biomech (Bristol, Avon) 2020; 71:160-166. [PMID: 31765911 DOI: 10.1016/j.clinbiomech.2019.11.009] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/24/2018] [Revised: 07/24/2019] [Accepted: 11/12/2019] [Indexed: 02/07/2023]
Abstract
BACKGROUND Repeated exposures to larger lateral trunk-pelvic motion and features of knee joint loading likely influence the onset of low back pain and knee osteoarthritis among persons with lower-limb amputation. Decreased hip abductor strength can also influence frontal plane trunk-pelvic motion and knee moments; however, it is unclear how these are inter-related post-amputation. METHODS Twenty-four participants with unilateral lower-limb amputation (14 transtibial; 10 transfemoral) and eight uninjured controls walked at 1.3 m/s while full-body biomechanical data were captured. Multiple linear regression and Cohen's f2 predicted (P < 0.05) the influences of mediolateral trunk and pelvic ranges of motion and angular accelerations, and bilateral isometric hip abductor strength on peak (intact) knee adduction moment and loading rate. FINDINGS There were no group differences in hip strength, peak knee adduction moment or pelvis acceleration (p > 0.06). The combination of hip strength, and mediolateral trunk and pelvic motion did not predict (F(5,29) = 2.53, p = 0.06, adjusted R2 = 0.27, f2 = 0.08) peak knee adduction moment. However, the combination of hip strength and trunk and pelvis acceleration predicted knee adduction moment loading rate (F(7,29) = 3.59, p = 0.008, adjusted R2 = 0.45, f2 = 0.25), with peak trunk acceleration (β = 0.72, p = 0.008) and intact hip strength (β = 0.78, p = 0.008) significantly contributing to the model. INTERPRETATION These data suggest increased hip abductor strength counteracts increased lateral trunk acceleration, concomitantly influencing the rate at which the ground reaction force vector loads the intact knee joint. Persons with lower-limb amputation perhaps compensate for increased intact limb loading by increasing trunk motion, thereby increasing demand on hip abductors to attenuate this preferential loading.
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Affiliation(s)
- Courtney M Butowicz
- Research and Development Section, Department of Rehabilitation, Walter Reed National Military Medical Center, Bethesda, MD, USA
| | - Rebecca L Krupenevich
- Research and Development Section, Department of Rehabilitation, Walter Reed National Military Medical Center, Bethesda, MD, USA; Department of Kinesiology, University of Maryland, College Park, MD, USA
| | - Julian C Acasio
- Research and Development Section, Department of Rehabilitation, Walter Reed National Military Medical Center, Bethesda, MD, USA
| | - Christopher L Dearth
- Research and Development Section, Department of Rehabilitation, Walter Reed National Military Medical Center, Bethesda, MD, USA; DoD-VA Extremity Trauma & Amputation Center of Excellence, USA; Department of Surgery, Uniformed Services University of the Health Sciences, Bethesda, MD, USA
| | - Brad D Hendershot
- Research and Development Section, Department of Rehabilitation, Walter Reed National Military Medical Center, Bethesda, MD, USA; DoD-VA Extremity Trauma & Amputation Center of Excellence, USA; Department of Rehabilitation Medicine, Uniformed Services University of the Health Sciences, Bethesda, MD, USA.
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26
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Turra A, Ragagnin MN, McCarthy ID, Fernandez WS. The effect of ocean acidification on the intertidal hermit crab Pagurus criniticornis is not modulated by cheliped amputation and sex. Mar Environ Res 2020; 153:104794. [PMID: 31582297 DOI: 10.1016/j.marenvres.2019.104794] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2019] [Revised: 09/23/2019] [Accepted: 09/27/2019] [Indexed: 06/10/2023]
Abstract
Impacts of the interactive effects of ocean acidification (OA) with other anthropogenic environmental stressors on marine biodiversity are receiving increasing attention in recent years. However, little is known about how organismal responses to OA may be influenced by common phenomena such as autotomy and sexual dimorphism. This study evaluated the long-term (120 days) combined effects of OA (pH 7.7), experimental cheliped amputation and sex on physiological stress (mortality, growth, number of molts, cheliped regeneration and startle response) and energy budget (lipid and calcium contents) in the intertidal sexually-dimorphic hermit crab Pagurus criniticornis. Crabs exposed to OA reduced survivorship (46%), molting frequency (36%) and lipid content (42%). Autotomised crabs and males molted more frequently (39% and 32%, respectively). Males presented higher regeneration (33%) and lower lipid content (24%). The few synergistic effects recorded did not indicate any clear pattern among treatments however, (1) a stronger reduction in lipid content was recorded in non-autotomised crabs exposed to low pH; (2) calcium content was higher in males than females only for autotomised crabs under control pH; and (3) autotomised females showed a proportionally slower activity recovery than autotomised males. Although our results suggest an effect of long-term exposure to low pH on the physiological stress and energy budget of Pagurus criniticornis, the physiological repertoire and plasticity associated with limb regeneration and the maintenance of dimorphism in secondary sexual characters may provide resilience to long-term exposure to OA.
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Affiliation(s)
- Alexander Turra
- Oceanographic Institute, University of São Paulo, São Paulo, 05508-120, SP, Brazil.
| | - Marilia N Ragagnin
- Oceanographic Institute, University of São Paulo, São Paulo, 05508-120, SP, Brazil
| | - Ian D McCarthy
- School of Ocean Sciences, Bangor University, Menai Bridge, Anglesey, LL59 5AB, United Kingdom
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Acasio JC, Shojaei I, Banerjee R, Dearth CL, Bazrgari B, Hendershot BD. Trunk-Pelvis motions and spinal loads during upslope and downslope walking among persons with transfemoral amputation. J Biomech 2019; 95:109316. [PMID: 31471112 DOI: 10.1016/j.jbiomech.2019.109316] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2019] [Revised: 07/28/2019] [Accepted: 08/14/2019] [Indexed: 11/27/2022]
Abstract
Larger trunk and pelvic motions in persons with (vs. without) lower limb amputation during activities of daily living (ADLs) adversely affect the mechanical demands on the lower back. Building on evidence that such altered motions result in larger spinal loads during level-ground walking, here we characterize trunk-pelvic motions, trunk muscle forces, and resultant spinal loads among sixteen males with unilateral, transfemoral amputation (TFA) walking at a self-selected speed both up ("upslope"; 1.06 ± 0.14 m/s) and down ("downslope"; 0.98 ± 0.20 m/s) a 10-degree ramp. Tri-planar trunk and pelvic motions were obtained (and ranges-of-motion [ROM] computed) as inputs for a non-linear finite element model of the spine to estimate global and local muscle (i.e., trunk movers and stabilizers, respectively) forces, and resultant spinal loads. Sagittal- (p = 0.001), frontal- (p = 0.004), and transverse-plane (p < 0.001) trunk ROM, and peak mediolateral shear (p = 0.011) and local muscle forces (p = 0.010) were larger (respectively 45, 35, 98, 70, and 11%) in upslope vs. downslope walking. Peak anteroposterior shear (p = 0.33), compression (p = 0.28), and global muscle (p = 0.35) forces were similar between inclinations. Compared to previous reports of persons with TFA walking on level ground, 5-60% larger anteroposterior and mediolateral shear observed here (despite ∼0.25 m/s slower walking speeds) suggest greater mechanical demands on the low back in sloped walking, particularly upslope. Continued characterization of trunk motions and spinal loads during ADLs support the notion that repeated exposures to these larger-than-normal (i.e., vs. level-ground walking in TFA and uninjured cohorts) spinal loads contribute to an increased risk for low back injury following lower limb amputation.
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Affiliation(s)
- Julian C Acasio
- Research and Development Section, Department of Rehabilitation, Walter Reed National Military Medical Center, Bethesda, MD, USA; Henry M. Jackson Foundation for the Advancement of Military Medicine, Inc., Bethesda, MD, USA
| | - Iman Shojaei
- F. Joseph Halcomb III, M.D. Department of Biomedical Engineering, University of Kentucky, Lexington, KY, USA
| | - Rajit Banerjee
- University of Toledo College of Medicine and Life Sciences, Toledo, OH, USA
| | - Christopher L Dearth
- Research and Development Section, Department of Rehabilitation, Walter Reed National Military Medical Center, Bethesda, MD, USA; DoD-VA Extremity Trauma & Amputation Center of Excellence, USA; Department of Surgery, Uniformed Services University of the Health Sciences, Bethesda, MD, USA
| | - Babak Bazrgari
- F. Joseph Halcomb III, M.D. Department of Biomedical Engineering, University of Kentucky, Lexington, KY, USA
| | - Brad D Hendershot
- Research and Development Section, Department of Rehabilitation, Walter Reed National Military Medical Center, Bethesda, MD, USA; DoD-VA Extremity Trauma & Amputation Center of Excellence, USA; Department of Rehabilitation Medicine, Uniformed Services University of the Health Sciences, Bethesda, MD, USA.
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Abstract
BACKGROUND Alongside physical impairment, psychosocial health issues may arise after amputation, impacting quality of life. Traditional psychosocial care models provide services in a linear fashion, with limited supports upon discharge. A novel program entitled Amputees Unanimous is a 12-step program provided for amputees by amputees. OBJECTIVE To shape the final content of Amputees Unanimous by identifying personal beliefs and opinions of healthcare professionals and amputees. STUDY DESIGN Qualitative design utilizing a phenomenological approach. METHOD Five focus groups were held: four with amputees and one with healthcare providers. A phenomenological approach shaped the inquiry of the lived experience of limb loss in relation to the content of Amputees Unanimous. RESULTS Three themes emerged: (1) accepting limb loss, (2) peer inspiration, and (3) regaining prior level of function. CONCLUSION Limb loss may alter one's self-image, both physically and psychologically, having a profound effect on how an individual copes throughout his or her lifetime. The content and delivery format of Amputees Unanimous could be tested for effectiveness as a program tailored to facilitate coping after limb loss and to provide encouragement, support, and hope for the future of amputees. CLINICAL RELEVANCE A dynamic, amputee-led, mutual help program may provide individuals with limb loss a place for encouragement, support, and optimism for the future.
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Affiliation(s)
- Catrinna Amorelli
- 1 Specialty Care Services, Vilseck Army Health Clinic, Vilseck, Germany
| | - Kathleen Yancosek
- 2 Department of Rehabilitation Medicine, Center for the Intrepid, Brooke Army Medical Center, San Antonio, TX, USA
| | - Ruth Morris
- 3 University of Texas Health Science Center at San Antonio, San Antonio, TX, USA
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29
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Highsmith MJ, Goff LM, Lewandowski AL, Farrokhi S, Hendershot BD, Hill OT, Rábago CA, Russell-Esposito E, Orriola JJ, Mayer JM. Low back pain in persons with lower extremity amputation: a systematic review of the literature. Spine J 2019; 19:552-563. [PMID: 30149083 DOI: 10.1016/j.spinee.2018.08.011] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/26/2018] [Revised: 08/14/2018] [Accepted: 08/20/2018] [Indexed: 02/03/2023]
Abstract
BACKGROUND CONTEXT Lower extremity amputation (LEA) is associated with an elevated risk for development and progression of secondary health conditions. Low back pain (LBP) is one such condition adversely affecting function, independence, and quality of life. PURPOSE The purpose of this study was to systematically review the literature to determine the strength of evidence relating the presence and severity of LBP secondary to LEA, thereby supporting the formulation of empirical evidence statements (EESs) to guide practice and future research. STUDY DESIGN/SETTING Systematic review of the literature. METHODS A systematic review of five databases was conducted followed by evaluation of evidence and synthesis of EESs. RESULTS Seventeen manuscripts were included. From these, eight EESs were synthesized within the following categories: epidemiology, amputation level, function, disability, leg length, posture, spinal kinematics, and osseointegrated prostheses. Only the EES on epidemiology was supported by evidence at the moderate confidence level given support by eight moderate quality studies. The four EESs for amputation level, leg length, posture, and spinal kinematics were supported by evidence at the low confidence level given that each of these statements had some evidence not supporting the statement but ultimately more evidence (and of higher quality) currently supporting the statement. The remaining three EESs that addressed function, disability and osseointegrated prosthetic use were all supported by single studies or had comparable evidence that disagreed with study findings rendering insufficient evidence to support the respective EES. CONCLUSIONS Based on the state of the current evidence, appropriate preventative and, particularly, treatment strategies to manage LBP in persons with LEA remain a knowledge gap and an area of future study.
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Affiliation(s)
- M Jason Highsmith
- Extremity Trauma & Amputation Center of Excellence (EACE), US Department of Veterans' Affairs, US Department of Defense, 13000 Bruce B. Downs Blvd., Tampa, FL, 33612, USA; School of Physical Therapy & Rehabilitation Sciences, Morsani College of Medicine, University of South Florida, 3515 E. Fletcher Ave. Tampa, FL, 33612, USA; 319th Minimal Care Detachment, U.S. Army Reserves, Pinellas Park, 2801 Grand Ave. Pinellas Park, FL, USA, 33782.
| | - Lisa M Goff
- Center of Innovation on Disability & Rehabilitation Research, James A. Haley Veterans' Administration Hospital, 8900 Grand Oak Ci, Tampa, FL, 33637, USA
| | | | - Shawn Farrokhi
- Extremity Trauma & Amputation Center of Excellence (EACE), US Department of Veterans' Affairs, US Department of Defense, 34800 Bob Wilson Dr. San Diego, CA, 92134, USA; The Department of Physical and Occupational Therapy, Naval Medical Center San Diego, San Diego, 34800 Bob Wilson Dr. San Diego, CA, 92134, USA
| | - Brad D Hendershot
- Extremity Trauma & Amputation Center of Excellence (EACE), US Department of Veterans' Affairs, US Department of Defense, Bethesda, 4494 North Palmer Rd, Bethesda, MD, 20889, USA; Department of Rehabilitation, Research and Development Section, Walter Reed National Military Medical Center, Bethesda, 4494 North Palmer Rd, Bethesda, MD, 20889, USA
| | - Owen T Hill
- Extremity Trauma & Amputation Center of Excellence (EACE), US Department of Veterans' Affairs, US Department of Defense, Ft. Sam Houston, 3851 Roger Brooke Dr, San Antonio, TX, 78234, USA
| | - Christopher A Rábago
- Extremity Trauma & Amputation Center of Excellence (EACE), US Department of Veterans' Affairs, US Department of Defense, Ft. Sam Houston, 3851 Roger Brooke Dr, San Antonio, TX, 78234, USA; Center for the Intrepid, Department of Rehabilitation Medicine, Brooke Army Medical Center, JBSA, Ft. Sam Houston, 3851 Roger Brooke Dr, San Antonio, TX, 78234, USA
| | - Elizabeth Russell-Esposito
- Extremity Trauma & Amputation Center of Excellence (EACE), US Department of Veterans' Affairs, US Department of Defense, Ft. Sam Houston, 3851 Roger Brooke Dr, San Antonio, TX, 78234, USA; Center for the Intrepid, Department of Rehabilitation Medicine, Brooke Army Medical Center, JBSA, Ft. Sam Houston, 3851 Roger Brooke Dr, San Antonio, TX, 78234, USA
| | - John J Orriola
- Shimberg Health Sciences Library, Morsani College of Medicine, University of South Florida, 12901 Bruce B. Downs Blvd., Tampa, FL, 33612
| | - John M Mayer
- U.S. Spine & Sport Foundation, 3760 Convoy St #101. San Diego, CA, 92111, USA
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Shojaei I, Hendershot BD, Acasio JC, Dearth CL, Ballard M, Bazrgari B. Trunk muscle forces and spinal loads in persons with unilateral transfemoral amputation during sit-to-stand and stand-to-sit activities. Clin Biomech (Bristol, Avon) 2019; 63:95-103. [PMID: 30851567 PMCID: PMC6503321 DOI: 10.1016/j.clinbiomech.2019.02.021] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/12/2018] [Revised: 02/13/2019] [Accepted: 02/26/2019] [Indexed: 02/07/2023]
Abstract
BACKGROUND Alterations and asymmetries in trunk motions during activities of daily living, involving lower extremities, are suggested to cause higher spinal loads in persons with unilateral lower limb amputation. Given the repetitive nature of most activities of daily living, knowledge of the amount of increase in spinal loads is important for designing interventions aimed at prevention of secondary low back pain due to potential fatigue failure of spinal tissues. The objective of this study was to determine differences in trunk muscle forces and spinal loads between persons with and without lower limb amputation when performing sit-to-stand and stand-to-sit tasks. METHODS Kinematics of the pelvis and thorax, obtained from ten males with unilateral transfemoral lower limb amputation and 10 male uninjured controls when performing sit-to-stand and stand-to-sit activities, were used within a non-linear finite element model of the spine to estimate trunk muscle forces and resultant spinal loads. FINDINGS The peak compression force, medio-lateral (only during stand-to-sit), and antero-posterior shear forces were respectively 348 N, 269 N, and 217 N larger in person with vs. without amputation. Persons with amputation also experienced on average 171 N and 53 N larger mean compression force and medio-lateral shear force, respectively. INTERPRETATION While spinal loads were larger in persons with amputation, these loads were generally smaller than the reported threshold for spinal tissue injury. However, a rather small increase in spinal loads during common activities of daily living like walking, sit-to-stand, and stand-to-sit may nevertheless impose a significant risk of fatigue failure for spinal tissues due to the repetitive nature of these activities.
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Affiliation(s)
- Iman Shojaei
- Department of Biomedical Engineering, F. Joseph Halcomb III, M.D. University of Kentucky, Lexington, KY 40506, USA
| | - Brad D. Hendershot
- DoD-VA Extremity Trauma and Amputation Center of Excellence, Bethesda, MD, USA,Department of Rehabilitation, Research and Development Section, Walter Reed National Military Medical Center, Bethesda, MD, USA,Department of Rehabilitation Medicine, Uniformed Services University of the Health Sciences, Bethesda, MD, USA
| | - Julian C. Acasio
- Department of Rehabilitation, Research and Development Section, Walter Reed National Military Medical Center, Bethesda, MD, USA
| | - Christopher L. Dearth
- DoD-VA Extremity Trauma and Amputation Center of Excellence, Bethesda, MD, USA,Department of Rehabilitation, Research and Development Section, Walter Reed National Military Medical Center, Bethesda, MD, USA,Department of Rehabilitation Medicine, Uniformed Services University of the Health Sciences, Bethesda, MD, USA
| | - Matthew Ballard
- Department of Biomedical Engineering, F. Joseph Halcomb III, M.D. University of Kentucky, Lexington, KY 40506, USA
| | - Babak Bazrgari
- Department of Biomedical Engineering, F. Joseph Halcomb III, M.D. University of Kentucky, Lexington, KY 40506, USA
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31
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Mayo A, Cimino S, Hitzig S. A Depiction of Rehabilitation Patients 65 Years and Younger With Dysvascular Lower Extremity Amputation. Can Prosthet Orthot J 2019; 2:31950. [PMID: 37614808 PMCID: PMC10443480 DOI: 10.33137/cpoj.v2i1.31950] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2018] [Accepted: 02/21/2019] [Indexed: 11/23/2022] Open
Abstract
BACKGROUND The majority of lower limb amputations (LLA) in Canada are dysvascular due to complications of diabetes and/or vascular disease. Traditionally dysvascular amputations have occurred in the elderly. With younger onset of adult diabetes, amputations are now occurring in non-geriatric populations. An understanding of younger patients with dysvascular LLA is needed to determine their risk factors, and unique health and psychosocial challenges. OBJECTIVES To obtain a depiction of the key demographic and impairment characteristics of adults 65 years and younger with dysvascular LLA undergoing inpatient rehabilitation. METHODOLOGY A retrospective chart review was completed on inpatient adult amputation rehabilitation patients over a five year period. Data extracted included socio-demographics, Functional Independence Measure (FIM) scores, comorbidities, and discharge outcomes. FINDINGS One hundred and forty-three patients who were 65 years and younger were included, which represented almost a quarter of all admissions. Most patients were male (79%) with an average age of 55 years old (SD=8). The majority (72%) were unemployed. The mean number of co-morbidities was 5.2 (SD=8.2). Individuals discharged home (n=122) had higher (p<0.05) FIM scores than those readmitted to acute care or discharged to long-term care (n=20). CONCLUSIONS Similar to the literature on older dysvascular LLA patients, our study found high rates of disability and co-morbidities in younger patients with dysvascular LLA, which might impact their ability to work. Given these challenges, better amputation prevention strategies and targeted rehabilitation programming for this population are needed.
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Affiliation(s)
- A.L. Mayo
- St. John’s Rehab, Sunnybrook Health Sciences Centre, Toronto, Canada
- Faculty of Medicine, University of Toronto, Toronto, Canada
| | - S.R. Cimino
- St. John’s Rehab Research Program, Evaluative Clinical Sciences, Sunnybrook Research Institute, Toronto, Canada
| | - S.L. Hitzig
- St. John’s Rehab Research Program, Evaluative Clinical Sciences, Sunnybrook Research Institute, Toronto, Canada
- Rehabilitation Sciences Institute, Faculty of Medicine, University of Toronto, Toronto, Canada
- Department of Occupational Science & Occupational Therapy, Faculty of Medicine, University of Toronto, Toronto, Canada
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Pruziner AL, Shaw EP, Rietschel JC, Hendershot BD, Miller MW, Wolf EJ, Hatfield BD, Dearth CL, Gentili RJ. Biomechanical and neurocognitive performance outcomes of walking with transtibial limb loss while challenged by a concurrent task. Exp Brain Res 2018; 237:477-491. [PMID: 30460393 DOI: 10.1007/s00221-018-5419-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2018] [Accepted: 10/26/2018] [Indexed: 01/19/2023]
Abstract
Individuals who have sustained loss of a lower limb may require adaptations in sensorimotor and control systems to effectively utilize a prosthesis, and the interaction of these systems during walking is not clearly understood for this patient population. The aim of this study was to concurrently evaluate temporospatial gait mechanics and cortical dynamics in a population with and without unilateral transtibial limb loss (TT). Utilizing motion capture and electroencephalography, these outcomes were simultaneously collected while participants with and without TT completed a concurrent task of varying difficulty (low- and high-demand) while seated and walking. All participants demonstrated a wider base of support and more stable gait pattern when walking and completing the high-demand concurrent task. The cortical dynamics were similarly modulated by the task demand for both groups, to include a decrease in the novelty-P3 component and increase in the frontal theta/parietal alpha ratio power when completing the high-demand task, although specific differences were also observed. These findings confirm and extend prior efforts indicating that dual-task walking can negatively affect walking mechanics and/or neurocognitive performance. However, there may be limited additional cognitive and/or biomechanical impact of utilizing a prosthesis in a stable, protected environment in TT who have acclimated to ambulating with a prosthesis. These results highlight the need for future work to evaluate interactions between these cognitive-motor control systems for individuals with more proximal levels of lower limb loss, and in more challenging (ecologically valid) environments.
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Affiliation(s)
- Alison L Pruziner
- DoD-VA Extremity Trauma and Amputation Center of Excellence, Bethesda, MD, USA. .,Department of Rehabilitation, Walter Reed National Military Medical Center, Bethesda, MD, USA. .,Department of Rehabilitation Medicine, Uniformed Services University of the Health Sciences, Bethesda, MD, USA.
| | - Emma P Shaw
- Department of Rehabilitation, Walter Reed National Military Medical Center, Bethesda, MD, USA.,Department of Kinesiology, School of Public Health, University of Maryland, College Park, MD, USA.,Neuroscience and Cognitive Science Program, University of Maryland, College Park, MD, USA
| | - Jeremy C Rietschel
- Department of Kinesiology, School of Public Health, University of Maryland, College Park, MD, USA.,Baltimore Veterans Administration Medical Center, Baltimore, MD, USA
| | - Brad D Hendershot
- DoD-VA Extremity Trauma and Amputation Center of Excellence, Bethesda, MD, USA.,Department of Rehabilitation, Walter Reed National Military Medical Center, Bethesda, MD, USA.,Department of Rehabilitation Medicine, Uniformed Services University of the Health Sciences, Bethesda, MD, USA
| | - Matthew W Miller
- Center for Neuroscience, School of Kinesiology, Auburn University, Auburn, AL, USA
| | - Erik J Wolf
- DoD-VA Extremity Trauma and Amputation Center of Excellence, Bethesda, MD, USA.,Department of Rehabilitation, Walter Reed National Military Medical Center, Bethesda, MD, USA.,Department of Rehabilitation Medicine, Uniformed Services University of the Health Sciences, Bethesda, MD, USA
| | - Bradley D Hatfield
- Department of Kinesiology, School of Public Health, University of Maryland, College Park, MD, USA.,Neuroscience and Cognitive Science Program, University of Maryland, College Park, MD, USA
| | - Christopher L Dearth
- DoD-VA Extremity Trauma and Amputation Center of Excellence, Bethesda, MD, USA.,Department of Rehabilitation, Walter Reed National Military Medical Center, Bethesda, MD, USA.,Department of Rehabilitation Medicine, Uniformed Services University of the Health Sciences, Bethesda, MD, USA.,Department of Surgery, Uniformed Services University of the Health Sciences, Bethesda, MD, USA
| | - Rodolphe J Gentili
- Department of Kinesiology, School of Public Health, University of Maryland, College Park, MD, USA.,Neuroscience and Cognitive Science Program, University of Maryland, College Park, MD, USA.,Maryland Robotics Center, University of Maryland, College Park, MD, USA
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Klenow TD, Mengelkoch LJ, Stevens PM, Ràbago CA, Hill OT, Latlief GA, Ruiz-Gamboa R, Jason Highsmith M. The role of exercise testing in predicting successful ambulation with a lower extremity prosthesis: a systematic literature review and clinical practice guideline. J Neuroeng Rehabil 2018; 15:64. [PMID: 30255804 PMCID: PMC6156901 DOI: 10.1186/s12984-018-0401-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND Growing discontent with the k-level system for functional classification of patients with limb loss and movement of healthcare toward evidence-based practice has resulted in the need for alternative forms of functional classification and development of clinical practice guidelines to improve access to quality prosthetic interventions. The purpose of this project was to develop and present a clinical practice recommendation for exercise testing in prosthetic patient care based on the results and synthesis of a systematic literature review. METHODS Database searches of PubMed, Google Scholar, Web of Science, and Cochrane were conducted and articles reviewed. Of the potential 1386 articles 10 met the criteria for inclusion. These articles were assessed using the critical appraisal tool of the United Kingdom National Service Framework for Long-Term Conditions. Of the 10 included articles eight were of high, one of medium, and one of low, quality. Data from these articles were synthesized into 6 empirical evidence statements, all qualifying for research grade A. These statements were used to develop the proposed clinical practice guideline. RESULTS While the results of this systematic review were not able to support the direct connection between cardiorespiratory performance and K-levels, the literature did support the ability of exercise testing results to predict successful prosthetic ambulation in some demographics. Both continuous maximum-intensity single lower extremity ergometer propelled by a sound limb and intermittent submaximal upper extremity ergometer protocols were found to be viable evaluation tools of cardiorespiratory fitness and function in the target population. CONCLUSION The ability to sustain an exercise intensity of ≥50% of a predicted VO2max value in single leg cycle ergometry testing and achievement of a sustained workload of 30 W in upper extremity ergometry testing were found to be the strongest correlates to successful ambulation with a prosthesis. VO2 values were found to increase in amputee subjects following a 6-week exercise program. These synthesized results of the systematic literature review regarding exercise testing in patients with loss of a lower extremity were used to develop and a present a clinical treatment pathway.
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Affiliation(s)
- Tyler D. Klenow
- Orthotic & Prosthetic Centers, Inc, 3005 Caring Way, Suite 3, Port Charlotte, FL 33952 USA
| | | | - Phillip M. Stevens
- Hanger Clinic, Salt Lake City, UT USA
- University of Utah School of Medicine, Physical Medicine and Rehabilitation, Salt Lake City, UT USA
| | - Chris A. Ràbago
- Center for the Intrepid, Department of Orthopaedics and Rehabilitation, Brooke Army Medical Center, Fort Sam Houston, TX USA
| | - Owen T. Hill
- Extremity Trauma & Amputation Center of Excellence (EACE), San Antonio Medical Center, Fort Sam Houston, TX USA
| | - Gail A. Latlief
- Department of Veterans Affairs, Veterans Health Administration, Regional Amputation Center, James A. Haley Veterans Hospital, Tampa, FL USA
| | | | - M. Jason Highsmith
- Extremity Trauma & Amputation Center of Excellence (EACE), James A. Haley Veterans Hospital, Tampa, FL USA
- University of South Florida. Morsani College of Medicine, School of Physical Therapy & Rehabilitation Sciences, Tampa, FL USA
- Army Reserves. 319th Minimal Care Detachment, Pinellas Park, FL USA
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Hendershot BD, Shojaei I, Acasio JC, Dearth CL, Bazrgari B. Walking speed differentially alters spinal loads in persons with traumatic lower limb amputation. J Biomech 2018; 70:249-254. [PMID: 29217090 DOI: 10.1016/j.jbiomech.2017.11.026] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2017] [Revised: 09/28/2017] [Accepted: 11/22/2017] [Indexed: 10/18/2022]
Abstract
Persons with lower limb amputation (LLA) perceive altered motions of the trunk/pelvis during activities of daily living as contributing factors for low back pain. When walking (at a singular speed), larger trunk motions among persons with vs. without LLA are associated with larger spinal loads; however, modulating walking speed is necessary in daily life and thus understanding the influences of walking speed on spinal loads in persons with LLA is of particular interest here. Three-dimensional trunk-pelvic kinematics, collected during level-ground walking at self-selected (SSW) and two controlled speeds (∼1.0 and ∼1.4 m/s), were obtained for seventy-eight participants: 26 with transfemoral and 26 with transtibial amputation, and 26 uninjured controls (CTR). Using a kinematics-driven, non-linear finite element model of the lower back, the resultant compressive and mediolateral/anteroposterior shear loads at the L5/S1 spinal level were estimated. Peak values were extracted and compiled. Despite walking slower at SSW speeds (∼0.21 m/s), spinal loads were 8-14% larger among persons with transfemoral amputation vs. CTR. Across all participants, peak compressive, mediolateral, and anteroposterior shear loads increased with increasing walking speed. At the fastest (vs. slowest) controlled speed, these increases were respectively 24-84% and 29-77% larger among persons with LLA relative to CTR. Over time, repeated exposures to these increased spinal loads, particularly at faster walking speeds, may contribute to the elevated risk for low back pain among persons with LLA. Future work should more completely characterize relative risk in daily life between persons with vs. without LLA by analyzing additional activities and tissue-level responses.
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Affiliation(s)
- Brad D Hendershot
- DoD-VA Extremity Trauma and Amputation Center of Excellence, Bethesda, MD, USA; Research and Development Section, Department of Rehabilitation, Walter Reed National Military Medical Center, Bethesda, MD, USA; Department of Rehabilitation Medicine, Uniformed Services University of the Health Sciences, Bethesda, MD, USA.
| | - Iman Shojaei
- F. Joseph Halcomb III, M.D. Department of Biomedical Engineering, University of Kentucky, Lexington, KY, USA
| | - Julian C Acasio
- Research and Development Section, Department of Rehabilitation, Walter Reed National Military Medical Center, Bethesda, MD, USA
| | - Christopher L Dearth
- DoD-VA Extremity Trauma and Amputation Center of Excellence, Bethesda, MD, USA; Research and Development Section, Department of Rehabilitation, Walter Reed National Military Medical Center, Bethesda, MD, USA; Department of Rehabilitation Medicine, Uniformed Services University of the Health Sciences, Bethesda, MD, USA
| | - Babak Bazrgari
- F. Joseph Halcomb III, M.D. Department of Biomedical Engineering, University of Kentucky, Lexington, KY, USA
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35
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Godfrey SB, Rossi M, Piazza C, Catalano MG, Bianchi M, Grioli G, Zhao KD, Bicchi A. SoftHand at the CYBATHLON: a user's experience. J Neuroeng Rehabil 2017; 14:124. [PMID: 29187203 PMCID: PMC5707829 DOI: 10.1186/s12984-017-0334-y] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2017] [Accepted: 11/06/2017] [Indexed: 11/11/2022] Open
Abstract
BACKGROUND Roughly one-quarter of upper limb prosthesis users reject their prosthesis. Reasons for rejection range from comfort, to cost, aesthetics, function, and more. This paper follows a single user from training with and testing of a novel upper-limb myoelectric prosthesis (the SoftHand Pro) for participation in the CYBATHLON rehearsal to training for and competing in the CYBATHLON 2016 with a figure-of-nine harness controlled powered prosthesis (SoftHand Pro-H) to explore the feasibility and usability of a flexible anthropomorphic prosthetic hand. METHODS The CYBATHLON pilot took part in multiple in-lab training sessions with the SoftHand Pro and SoftHand Pro-H; these sessions focused on basic control and use of the prosthetic devices and direct training of the tasks in the CYBATHLON. He used these devices in competition in the Powered Arm Prosthesis Race in the CYBATHLON rehearsal and 2016 events. RESULTS In training for the CYBATHLON rehearsal, the subject was able to quickly improve performance with the myoelectric SHP despite typically using a body-powered prosthetic hook. The subject improved further with additional training using the figure-of-nine harness-controlled SHPH in preparation for the CYBATHLON. The Pilot placed 3rd (out of 4) in the rehearsal. In the CYBATHLON, he placed 5th (out of 12) and was one of only two pilots who successfully completed all tasks in the competition, having the second-highest score overall. CONCLUSIONS Results with the SoftHand Pro and Pro-H suggest it to be a viable alternative to existing anthropomorphic hands and show that the unique flexibility of the hand is easily learned and exploited.
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Affiliation(s)
- Sasha Blue Godfrey
- Department of Advanced Robotics, Istituto Italiano di Tecnologia, Genoa, Italy
| | - Matteo Rossi
- Department of Advanced Robotics, Istituto Italiano di Tecnologia, Genoa, Italy
- Research Center “Enrico Piaggio”, University of Pisa, Pisa, Italy
| | - Cristina Piazza
- Research Center “Enrico Piaggio”, University of Pisa, Pisa, Italy
| | | | - Matteo Bianchi
- Research Center “Enrico Piaggio”, University of Pisa, Pisa, Italy
- Department of Information Engineering, University of Pisa, Pisa, Italy
| | - Giorgio Grioli
- Department of Advanced Robotics, Istituto Italiano di Tecnologia, Genoa, Italy
| | - Kristin D. Zhao
- Assistive and Restorative Technology Laboratory, Rehabilitation Medicine Research Center, Mayo Clinic, Rochester, USA
| | - Antonio Bicchi
- Department of Advanced Robotics, Istituto Italiano di Tecnologia, Genoa, Italy
- Research Center “Enrico Piaggio”, University of Pisa, Pisa, Italy
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36
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Wheaton LA. Neurorehabilitation in upper limb amputation: understanding how neurophysiological changes can affect functional rehabilitation. J Neuroeng Rehabil 2017; 14:41. [PMID: 28532464 PMCID: PMC5441064 DOI: 10.1186/s12984-017-0256-8] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2016] [Accepted: 05/15/2017] [Indexed: 11/19/2022] Open
Abstract
Background Significant advances have been made in developing new prosthetic technologies with the goal of restoring function to persons that suffer partial or complete loss of the upper limb. Despite these technological advances, many challenges remain in understanding barriers in patient adoption of technology, and what critical factors should be of focus in prosthetics development from a motor control perspective. This points to a potential opportunity to improve our understanding of amputation using neurophysiology and plasticity, and integrate this knowledge into the development of prosthetics technology in novel ways. Here, argument will be made to include a stronger focus on the neural and behavioral changes that result from amputation, and a better appreciation of the time-scale of changes which may significantly affect device adaptation, functional device utility, and motor learning implemented in rehabilitation environments. Conclusion By strengthening our understanding of the neuroscience of amputation, we may improve the ability to couple neurorehabilitation with neuroengineering to support clinician needs in yielding improved outcomes in patients.
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Affiliation(s)
- Lewis A Wheaton
- School of Biological Sciences, Georgia Institute of Technology, 555 14th Street, Atlanta, GA, 30332-0356, USA.
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37
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Ali S, Fatima Haider SK. Psychological Adjustment To Amputation: Variations On The Bases Of Sex, Age And Cause Of Limb Loss. J Ayub Med Coll Abbottabad 2017; 29:303-307. [PMID: 28718253] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
BACKGROUND Amputation is the removal of a limb or part of a limb by a surgical procedure in order to save the life of a person. The underlying reasons behind the occurrence of this tragic incidence may be varied. However, irrespective of its cause limb loss is associated with wide range of life challenges. The study was done to investigate the psychological sequel of an individual after losing a limb and to know the level of strain and pressure they experience after this traumatic event. It also attempts to examine the moderating role of some demographic traits such as age, sex and cause of limb loss in psychosocial adjustment to amputation. METHODS The study includes 100 adult amputees of both genders and the data was collected from major government and private hospitals of Peshawar district. Demographic data sheet was constructed in order to know the demographics traits of amputees and a standardize Psychological Adjustment Scale developed by Sabir (1999) was used to find out the level of psychological adjustment after limb loss. RESULTS Nearly all the amputees' exhibit signs of psychological maladjustment at varying degrees. Males showed much greater signs of maladjustment than women and young adults were much psychologically shattered and disturbed as a result of limb loss. Amputation caused by planned medical reasons leads to less adjustment issues as compared to unplanned accidental amputation in which patient were not mentally prepare to accept this loss. CONCLUSIONS Psychological aspect of amputation is an important aspect of limb loss which needs to be addressed properly in order to rehabilitate these patients and helps them to adjust successfully to their limb loss.
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Affiliation(s)
- Shaista Ali
- College of Home Economics, University of Peshawar, Pakistan
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38
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Kuiken TA, Butler BA, Sharkey T, Ivy AD, Li D, Peabody TD. Novel intramedullary device for lengthening transfemoral residual limbs. J Orthop Surg Res 2017; 12:53. [PMID: 28359320 PMCID: PMC5374578 DOI: 10.1186/s13018-017-0553-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/23/2017] [Accepted: 03/20/2017] [Indexed: 11/10/2022] Open
Abstract
Background Lower limb loss is a highly disabling medical condition that can severely impact a person’s quality of life. Recovery becomes especially challenging if an amputee has a short residual limb, which can complicate proper prosthetic fitting, causing discomfort, difficulties in suspension, and reduced mobility. Current limb lengthening techniques such as the Ilizarov apparatus and external fixators are cumbersome, uncomfortable, and have high complication rates. In this study, we investigated the effectiveness of a novel limb-lengthening device that uses intramedullary bone lengthening and requires only one percutaneous rod at the end of the limb during the distraction phase. Only the intramedullary nail remains after the distraction phase, and no external components are required during the consolidation phase. We hypothesize that this system would create a much easier experience for the patient. Methods The system was first tested in a mock surgical implantation using plastic femur bones. The device was then tested in a series of cadaveric experiments using pelvis-to-knee specimens by a group of surgeons. Surgeons evaluated the surgical insertion technique, soft tissue considerations, hardware fixation strategies, and the effectiveness of the distraction mechanism. Revisions and improvements to the device and surgical procedure were made based on the results from the cadaveric experiments. Results A questionnaire was given to two visiting surgeons following the final iteration of the device. The surgeons reported that the system effectively lengthened the limb, was sturdy, and could be installed efficiently. However, there remains a risk of infection and soft tissue imbalances, similar to that introduced by an external fixator device. Suggestions on how to improve the design of the device and mitigate infection through postoperative management and surgical standard of care will be considered for future clinical trials. Conclusions The described intramedullary residual limb-lengthening device has evolved from a prototype to a mature model tested in six cadaveric experiments to date. Further mechanical and functional testing is needed to finalize the device before testing in patients.
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Affiliation(s)
- Todd A Kuiken
- Center for Bionic Medicine, Rehabilitation Institute of Chicago, 345 E. Superior St. Room 1309, Chicago, IL, 60611, USA. .,Departments of PM&R, Surgery, and Biomedical Engineering, Northwestern University, Chicago, IL, 60611, USA.
| | - Bennet A Butler
- Department of Orthopedic Surgery, Northwestern University Feinberg School of Medicine, 676 N. Saint Clair, Suite 1350, Chicago, IL, 60611, USA
| | - Tom Sharkey
- Center for Bionic Medicine, Rehabilitation Institute of Chicago, 345 E. Superior St. Room 1309, Chicago, IL, 60611, USA
| | - Andre D Ivy
- Department of Orthopedic Surgery, Northwestern University Feinberg School of Medicine, 676 N. Saint Clair, Suite 1350, Chicago, IL, 60611, USA.,DuPage Medical Group, 1801 South Highland Avenue Suite 220, Lombard, IL, 60148, USA
| | - Daniel Li
- Department of Orthopedic Surgery, Northwestern University Feinberg School of Medicine, 676 N. Saint Clair, Suite 1350, Chicago, IL, 60611, USA.,Northwestern University Feinberg School of Medicine, 420 E Superior St, Chicago, IL, 60611, USA
| | - Terrance D Peabody
- Department of Orthopedic Surgery, Northwestern University Feinberg School of Medicine, 676 N. Saint Clair, Suite 1350, Chicago, IL, 60611, USA
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Kahle JT, Klenow TD, Highsmith MJ. COMPARATIVE EFFECTIVENESS OF AN ADJUSTABLE TRANSFEMORAL PROSTHETIC INTERFACE ACCOMMODATING VOLUME FLUCTUATION: CASE STUDY. Technol Innov 2016; 18:175-183. [PMID: 28066526 DOI: 10.21300/18.2-3.2016.175] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The socket-limb interface is vital for functionality and provides stability and mobility for the amputee. Volume fluctuation can lead to compromised fit and function. Current socket technology does not accommodate for volume fluctuation. An adjustable interface may improve function and comfort by filling this technology gap. The purpose of this study was to compare the effectiveness of the standard of care (SOC) ischial ramus containment to an adjustable transfemoral prosthetic interface socket in the accommodation of volume fluctuation. A prospective experimental case study using repeated measures of subjective and performance outcome measures between socket conditions was employed. In the baseline volume condition, the adjustable socket improved subjective and performance measures 19% to 37% over SOC, whereas the two-minute walk test demonstrated equivalence. In the volume loss condition, the adjustable socket improved all subjective and performance measures 22% to 93%. All aggregated data improved 16% to 50% compared with the SOC. In simulated volume gain, the SOC socket failed, while the subject was able to complete the protocol using the adjustable socket. In this case study, the SOC socket was inferior to the comparative adjustable transfemoral amputation interface in subjective and performance outcomes. There is a lack of clinical trials and evidence comparing socket functional outcomes related to volume fluctuation.
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Affiliation(s)
- Jason T Kahle
- OP Solutions, Tampa, FL, USA; Prosthetic Design + Research, Tampa, FL, USA
| | - Tyler D Klenow
- Prosthetics and Sensory Aids Service, James A. Haley Veterans' Hospital, Tampa, FL, USA
| | - M Jason Highsmith
- School of Physical Therapy & Rehabilitation Sciences, University of South Florida, Tampa, FL, USA; Extremity Trauma & Amputation Center of Excellence (EACE), U.S. Department of Veterans Affairs, Tampa, FL, USA; 319 Minimal Care Detachment, U.S. Army Reserves, Pinellas Park, FL, USA
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40
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Öndes F, Kaiser MJ, Murray LG. Quantification of the indirect effects of scallop dredge fisheries on a brown crab fishery. Mar Environ Res 2016; 119:136-143. [PMID: 27268589 DOI: 10.1016/j.marenvres.2016.05.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2015] [Revised: 05/20/2016] [Accepted: 05/23/2016] [Indexed: 06/06/2023]
Abstract
This study aimed to describe the characteristics of the by-catch of Cancer pagurus in king scallop dredges in the Isle of Man, and to determine the damage, immediate mortality and estimated mortality during fishing seasons associated with scallop dredges. Based on dredge surveys, spatial and seasonal variations were observed, with the highest number of crabs found off the west coast of the Isle of Man in the autumn when berried females crabs were most frequently caught. In general, female crabs comprised 84% of the catch. The damage levels of crabs was high with 45% of crabs recorded as crushed or dead or with severe damage, whilst 24% of crabs exhibited missing limbs. Estimates of the potential mortality associated with scallop dredging led to a lower and upper estimate of possible crab by-catch mortality of 15t and 24t respectively which represented 3.0-4.8% of the commercial landings of brown crab for the Isle of Man. Heaviest mortalities of crabs occurred in autumn to the west of the Isle of Man when female berried crabs move offshore into deeper water. The use of a temporary and spatially restricted scallop dredging closure could provide a simple solution to mitigate additional crab mortality in the event that scallop dredging increased beyond current levels in the future.
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Affiliation(s)
- Fikret Öndes
- School of Ocean Sciences, Bangor University, Menai Bridge, Anglesey, LL59 5AB, UK; Faculty of Fisheries, Izmir Katip Celebi University, Izmir, 35580, Turkey.
| | - Michel J Kaiser
- School of Ocean Sciences, Bangor University, Menai Bridge, Anglesey, LL59 5AB, UK.
| | - Lee G Murray
- School of Ocean Sciences, Bangor University, Menai Bridge, Anglesey, LL59 5AB, UK.
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Carlsen BT, Prigge P, Peterson J. Upper extremity limb loss: functional restoration from prosthesis and targeted reinnervation to transplantation. J Hand Ther 2014; 27:106-13; quiz 114. [PMID: 24397947 DOI: 10.1016/j.jht.2013.10.007] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/14/2013] [Revised: 09/03/2013] [Accepted: 10/30/2013] [Indexed: 02/03/2023]
Abstract
For several decades, prosthetic use was the only option to restore function after upper extremity amputation. Recent years have seen advances in the field of prosthetics. Such advances include prosthetic design and function, activity-specific devices, improved aesthetics, and adjunctive surgical procedures to improve both form and function. Targeted reinnervation is one exciting advance that allows for more facile and more intuitive function with prosthetics following proximal amputation. Another remarkable advance that holds great promise in nearly all fields of medicine is the transplantation of composite tissue, such as hand and face transplantation. Hand transplantation holds promise as the ultimate restorative procedure that can provide form, function, and sensation. However, this procedure still comes with a substantial cost in terms of the rehabilitation and toxic immunosuppression and should be limited to carefully selected patients who have failed prosthetic reconstruction. Hand transplantation and prosthetic reconstruction should not be viewed as competing options. Rather, they are two treatment options with different risk/benefit profiles and different indications and, hence vastly different implications.
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Affiliation(s)
- Brian T Carlsen
- Mayo Clinic, Division of Hand Surgery, Rochester, MN, USA; Mayo Clinic, Division of Plastic Surgery, Rochester, MN, USA.
| | - Pat Prigge
- Advanced Arm Dynamics, North Central Center of Excellence, Maple Grove, MN, USA
| | - Jennifer Peterson
- Advanced Arm Dynamics, North Central Center of Excellence, Maple Grove, MN, USA
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Raschke SU, Orendurff MS, Mattie JL, Kenyon DEA, Jones OY, Moe D, Winder L, Wong AS, Moreno-Hernández A, Highsmith MJ, J Sanderson D, Kobayashi T. Biomechanical characteristics, patient preference and activity level with different prosthetic feet: a randomized double blind trial with laboratory and community testing. J Biomech 2014; 48:146-52. [PMID: 25480541 DOI: 10.1016/j.jbiomech.2014.10.002] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2014] [Revised: 09/05/2014] [Accepted: 10/05/2014] [Indexed: 10/24/2022]
Abstract
Providing appropriate prosthetic feet to those with limb loss is a complex and subjective process influenced by professional judgment and payer guidelines. This study used a small load cell (Europa™) at the base of the socket to measure the sagittal moments during walking with three objective categories of prosthetic feet in eleven individuals with transtibial limb loss with MFCL K2, K3 and K4 functional levels. Forefoot stiffness and hysteresis characteristics defined the three foot categories: Stiff, Intermediate, and Compliant. Prosthetic feet were randomly assigned and blinded from participants and investigators. After laboratory testing, participants completed one week community wear tests followed by a modified prosthetics evaluation questionnaire to determine if a specific category of prosthetic feet was preferred. The Compliant category of prosthetic feet was preferred by the participants (P=0.025) over the Stiff and Intermediate prosthetic feet, and the Compliant and Intermediate feet had 15% lower maximum sagittal moments during walking in the laboratory (P=0.0011) compared to the Stiff feet. The activity level of the participants did not change significantly with any of the wear tests in the community, suggesting that each foot was evaluated over a similar number of steps, but did not inherently increase activity. This is the first randomized double blind study in which prosthetic users have expressed a preference for a specific biomechanical characteristic of prosthetic feet: those with lower peak sagittal moments were preferred, and specifically preferred on slopes, stairs, uneven terrain, and during turns and maneuvering during real world use.
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Affiliation(s)
- Silvia U Raschke
- Biomechanics Laboratory, British Columbia Institute of Technology, Burnaby, Canada
| | | | - Johanne L Mattie
- Biomechanics Laboratory, British Columbia Institute of Technology, Burnaby, Canada
| | - David E A Kenyon
- Biomechanics Laboratory, British Columbia Institute of Technology, Burnaby, Canada
| | - O Yvette Jones
- Biomechanics Laboratory, British Columbia Institute of Technology, Burnaby, Canada
| | - David Moe
- Barber Prosthetics, Vancouver, Canada
| | | | - Angie S Wong
- Biomechanics Laboratory, British Columbia Institute of Technology, Burnaby, Canada
| | - Ana Moreno-Hernández
- Biomechanics Laboratory, British Columbia Institute of Technology, Burnaby, Canada; School of Kinesiology, University of British Columbia, Vancouver, Canada; Laboratorio de Análisis de Movimiento, Instituto Nacional de Rehabilitación, México D.F., México
| | - M Jason Highsmith
- University of South Florida, College of Medicine, School of Physical Therapy & Rehabilitation Sciences, Tampa, FL, USA
| | - David J Sanderson
- Biomechanics Laboratory, British Columbia Institute of Technology, Burnaby, Canada; School of Kinesiology, University of British Columbia, Vancouver, Canada
| | - Toshiki Kobayashi
- Biomechanics Laboratory, Orthocare Innovations, Mountlake Terrace, WA, USA
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Abstract
In 2005, 1.6 million people were estimated to be living with limb loss; by 2050, the rate is expected to double to 3.6 million in the United States. Past data have shown that the rates of dysvascular amputations were increasing. However, recent studies looking at single diseases of peripheral arterial disease and diabetes mellitus show amputations related to these conditions are now decreasing. The authors think that it may not be a single disease process but rather the cumulative illness burden that is leading to amputations. In addition to cause, age, gender, and race continue to play a role in limb loss.
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Affiliation(s)
- Priya Varma
- Department of Physical Medicine and Rehabilitation, University of Pennsylvania, 1800 Lombard Street, 1st floor, Philadelphia, PA 19146, USA
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