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Paternò L, Truppa L, Ibrahimi M, Rosini E, Gruppioni E, Ricotti L, Menciassi A. Quantitative analysis of interface pressures in transfemoral prosthetic sockets. Prosthet Orthot Int 2024; 48:176-183. [PMID: 37379468 PMCID: PMC11005673 DOI: 10.1097/pxr.0000000000000251] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/29/2022] [Revised: 02/16/2023] [Accepted: 05/12/2023] [Indexed: 06/30/2023]
Abstract
BACKGROUND Among the different factors affecting socket comfort, the pressure applied on residual limb tissues is a crucial parameter for the success or failure of any prosthetic device. However, only a few incomplete data are available on people with transfemoral amputation, in this regard. This work aims at filling this gap in the literature. METHODS Ten people with transfemoral amputation wearing 3 different socket designs were recruited in this study: 2 ischial containment sockets featured by proximal trim lines that contain the ischial tuberosity and ramus and greater trochanter, 2 subischial sockets with proximal trim lines under the ischium level, and 6 quadrilateral sockets with proximal trim lines that contain the greater trochanter and create a horizontal seat for the ischial tuberosity. The pressure values at the anterior, lateral, posterior, and medial areas of the socket interface were recorded during 5 locomotion tasks (ie, horizontal, ascent, and descent walking, upstairs and downstairs) by using an F-Socket System (Tekscan Inc., Boston, MA). Gait segmentation was performed by exploiting plantar pressure, which was acquired by an additional sensor under the foot. Mean and standard deviation of minimum and maximum values were calculated for each interface area, locomotion task, and socket design. The mean pressure patterns during different locomotion tasks were reported, as well. RESULTS Considering all subjects irrespective of socket design, the mean pressure range resulted 45.3 (posterior)-106.7 (posterior) kPa in horizontal walking; 48.3 (posterior)-113.8 (posterior) kPa in ascent walking; 50.8 (posterior)-105.7 (posterior) kPa in descent walking; 47.9 (posterior)-102.9 (lateral) kPa during upstairs; and 41.8 (posterior)-84.5 (anterior) kPa during downstairs. Qualitative differences in socket designs have been found. CONCLUSIONS These data allow for a comprehensive analysis of pressures acting at the tissue-socket interface in people with transfemoral amputation, thus offering essential information for the design of novel solutions or to improve existing ones, in this field.
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Affiliation(s)
- Linda Paternò
- The BioRobotics Institute—Scuola Superiore Sant’Anna, Pisa, Italy
- Department of Excellence in Robotics and AI, Scuola Superiore Sant’Anna, Pisa, Italy
| | - Luigi Truppa
- The BioRobotics Institute—Scuola Superiore Sant’Anna, Pisa, Italy
- Department of Excellence in Robotics and AI, Scuola Superiore Sant’Anna, Pisa, Italy
| | - Michele Ibrahimi
- The BioRobotics Institute—Scuola Superiore Sant’Anna, Pisa, Italy
- Department of Excellence in Robotics and AI, Scuola Superiore Sant’Anna, Pisa, Italy
| | - Elisa Rosini
- The BioRobotics Institute—Scuola Superiore Sant’Anna, Pisa, Italy
- Department of Excellence in Robotics and AI, Scuola Superiore Sant’Anna, Pisa, Italy
| | | | - Leonardo Ricotti
- The BioRobotics Institute—Scuola Superiore Sant’Anna, Pisa, Italy
- Department of Excellence in Robotics and AI, Scuola Superiore Sant’Anna, Pisa, Italy
| | - Arianna Menciassi
- The BioRobotics Institute—Scuola Superiore Sant’Anna, Pisa, Italy
- Department of Excellence in Robotics and AI, Scuola Superiore Sant’Anna, Pisa, Italy
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Scoping review to evaluate existing measurement parameters and clinical outcomes of transtibial prosthetic alignment and socket fit. Prosthet Orthot Int 2022; 46:95-107. [PMID: 35412519 DOI: 10.1097/pxr.0000000000000061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/14/2021] [Accepted: 08/09/2021] [Indexed: 02/03/2023]
Abstract
INTRODUCTION Fit and alignment are observable objectives of the prosthesis rendering process for individuals with lower limb amputation. Nevertheless, there is a dearth of validated measures to directly assess the quality of this clinical procedure. OBJECTIVES The objectives of this scoping review are to evaluate existing measurement parameters and clinical outcomes used in investigations of transtibial socket fit or prosthetic alignment and to identify gaps in the literature regarding tools for evaluation of prosthetic fitting. STUDY DESIGN Scoping literature review. METHODS A comprehensive search was conducted in the following databases: MEDLINE (through PubMed), Embase (through Elsevier), Scopus (through Elsevier), and Engineering Village (through Elsevier), resulting in 6107 studies to be screened. RESULTS Sixty-three studies were included in the review. When measuring fit, studies most frequently reported on patient-reported comfort (n = 22) and socket size compared with the residual limb volume (n = 9). Alignment was most frequently measured by the prosthetists' judgment and/or use of an alignment jig (n = 34). The measurement parameters used to determine alignment or fit varied greatly among the included studies. CONCLUSION This review demonstrated that most measures of socket fit rely on a patient's self-report and may vary with biopsychosocial factors unrelated to the socket fitting process. Meanwhile, alignment is determined mostly by the prosthetist's judgment, paired with objective measurements, such as alignment jigs and gait analysis. Efforts to standardize and validate measures of these parameters of prosthetic fitting are vital to improving clinical practice and reporting outcomes.
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McGeehan MA, Adamczyk PG, Nichols KM, Hahn ME. A simulation-based analysis of the effects of variable prosthesis stiffness on interface dynamics between the prosthetic socket and residual limb. J Rehabil Assist Technol Eng 2022; 9:20556683221111986. [PMID: 35859652 PMCID: PMC9289901 DOI: 10.1177/20556683221111986] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Accepted: 06/21/2022] [Indexed: 11/23/2022] Open
Abstract
Introduction: Loading of a residual limb within a prosthetic socket
can cause tissue damage such as ulceration. Computational simulations may be
useful tools for estimating tissue loading within the socket, and thus provide
insights into how prosthesis designs affect residual limb-socket interface
dynamics. The purpose of this study was to model and simulate residual
limb-socket interface dynamics and evaluate the effects of varied prosthesis
stiffness on interface dynamics during gait. Methods: A spatial contact model of a residual limb-socket interface
was developed and integrated into a gait model with a below-knee amputation.
Gait trials were simulated for four subjects walking with low, medium, and high
prosthesis stiffness settings. The effects of prosthesis stiffness on interface
kinematics, normal pressure, and shear stresses were evaluated. Results: Model-predicted values were similar to those reported
previously in sensor-based experiments; increased stiffness resulted in greater
average normal pressure and shear stress (p < 0.05). Conclusions: These methods may be useful to aid experimental studies
by providing insights into the effects of varied prosthesis design parameters or
gait conditions on residual limb-socket interface dynamics. The current results
suggest that these effects may be subject-specific.
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Affiliation(s)
| | - Peter G Adamczyk
- Department of Mechanical Engineering, University of Wisconsin-Madison, Madison, WI, USA
| | - Kieran M Nichols
- Department of Mechanical Engineering, University of Wisconsin-Madison, Madison, WI, USA
| | - Michael E Hahn
- Department of Human Physiology, University of Oregon, Eugene, OR, USA
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Proof of Concept for the Detection of Local Pressure Marks in Prosthesis Sockets Using Structural Dynamics Measurement. SENSORS 2021; 21:s21113821. [PMID: 34073104 PMCID: PMC8198458 DOI: 10.3390/s21113821] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Revised: 05/06/2021] [Accepted: 05/27/2021] [Indexed: 11/28/2022]
Abstract
The wear comfort of a prosthesis is of great importance for amputee patients. The wear comfort can be affected by changes in the interface between the residual limb and prosthesis socket, which can be caused by time-dependent volume fluctuations of the tissue, leading to unwanted local pressure marks. The basis to ensure time-independent wear comfort of a prosthesis is to identify these changes. Common techniques for identifying these variations have a negative impact on the sensitive interface between the residual limb and prosthesis. The following paper contains a proof of concept for the detection of local pressure marks without affecting the described interface using structural dynamics measurements, exemplarily shown at a prosthetic socket for transfemoral amputees in a test bench scenario. The dynamical behaviour of the investigated system is analysed in the form of frequency response functions acquired for different pressure locations and preloads using an impact hammer for excitation and a triaxial acceleration sensor. The frequency response functions show major changes for the various boundary conditions with respect to their frequency-dependent compositions. The results demonstrate how the utilised method enables the identification of changes in local pressure marks regarding the variation of position and magnitude.
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An Investigation of Pressure Profiles and Wearer Comfort During Walking With a Transtibial Hydrocast Socket. Am J Phys Med Rehabil 2019; 98:199-206. [PMID: 30222605 DOI: 10.1097/phm.0000000000001043] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
OBJECTIVE The aims of the study were to conduct an investigation of the transtibial hydrocast socket interface pressures during walking and to explore potential relationships between pressures experienced and resultant wearer comfort. DESIGN In this cross-sectional study, pressure data at the limb and hydrocast socket interface during walking were collected from 16 users of hydrocast sockets. The pressures at this interface were described by location, magnitude, and duration for all participants and were compared between the most and least comfortable participants. RESULTS High pressures were found about the bony prominences of the residual limb, especially the tibial crest of the anterior distal region. Factors identified as potentially causing discomfort (P < 0.1, d > 0.80) were high peak pressures at the anterior proximal region and longer durations of submaximal loading at the lateral proximal region and the anterior and medial distal regions. High pressure variability at the anterior proximal region may also contribute to discomfort (P = 0.106, d = 0.88). CONCLUSIONS The hydrocast socket interface pressures have been described for a cohort of users. A number of differences were found in the pressure profiles of the most and least comfortable participants. These differences suggest trends between the identified pressure parameters and resultant wearer comfort. Future studies should confirm these exploratory results.
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Gupta S, Loh KJ, Pedtke A. Sensing and actuation technologies for smart socket prostheses. Biomed Eng Lett 2019; 10:103-118. [PMID: 32175132 DOI: 10.1007/s13534-019-00137-5] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Revised: 10/17/2019] [Accepted: 10/26/2019] [Indexed: 01/20/2023] Open
Abstract
The socket is the most critical part of every lower-limb prosthetic system, since it serves as the interfacial component that connects the residual limb with the artificial system. However, many amputees abandon their socket prostheses due to the high-level of discomfort caused by the poor interaction between the socket and residual limb. In general, socket prosthesis performance is determined by three main factors, namely, residual limb-socket interfacial stress, volume fluctuation of the residual limb, and temperature. This review paper summarizes the various sensing and actuation solutions that have been proposed for improving socket performance and for realizing next-generation socket prostheses. The working principles of different sensors and how they have been tested or used for monitoring the socket interface are discussed. Furthermore, various actuation methods that have been proposed for actively modifying and improving the socket interface are also reviewed. Through the continued development and integration of these sensing and actuation technologies, the long-term vision is to realize smart socket prostheses. Such smart socket systems will not only function as a socket prosthesis but will also be able to sense parameters that cause amputee discomfort and self-adjust to optimize its fit, function, and performance.
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Affiliation(s)
- Sumit Gupta
- 1Department of Structural Engineering, University of California-San Diego, La Jolla, CA 92093-0085 USA
| | - Kenneth J Loh
- 1Department of Structural Engineering, University of California-San Diego, La Jolla, CA 92093-0085 USA
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Spaulding SE, Yamane A, McDonald CL, Spaulding SA. A conceptual framework for orthotic and prosthetic education. Prosthet Orthot Int 2019; 43:369-381. [PMID: 31199192 DOI: 10.1177/0309364619852455] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
BACKGROUND Variables that influence orthotic and prosthetic patient outcomes beyond direct care are poorly conceptualized for orthotic and prosthetic students. Restructuring educational curricula around important clinical reasoning variables (i.e. factors that may influence outcomes) could improve teaching, learning, and clinical practice. OBJECTIVES To propose an orthotic and prosthetic education framework to enhance the development of orthotic and prosthetic students' clinical reasoning skills. STUDY DESIGN Scoping review. METHODS We conducted a scoping review, identified variables of orthotic and prosthetic usability, and performed a qualitative thematic analysis through the lens of orthotic and prosthetic clinical educators to develop a conceptual framework for orthotic and prosthetic education. RESULTS Sorting of variables identified from the literature resulted in three thematic areas: (1) the state of functioning, disability, and health (International Classification of Functioning, Disability and Health); (2) orthotic and prosthetic technical properties, procedures, and appropriateness; and (3) professional service as part of orthotic and prosthetic interventions. The proposed orthotic and prosthetic education framework includes these three areas situated within the context of patient-centered care. CONCLUSIONS A conceptual framework was developed from variables identified in peer-reviewed literature. This orthotic and prosthetic education framework provides a structure to explore orthotic and prosthetic clinical reasoning and advance our teaching and assessment of students' clinical reasoning skills. CLINICAL RELEVANCE The proposed orthotic and prosthetic (O&P) education framework is intended to promote conversation about variables (e.g. health condition, procedures, services, and O&P principles) that influence O&P clinical practice outcomes and further advance our teaching and assessment of students' clinical reasoning skills.
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Affiliation(s)
- Susan E Spaulding
- 1 Department of Rehabilitation Medicine, University of Washington, Seattle, WA, USA
| | - Ann Yamane
- 1 Department of Rehabilitation Medicine, University of Washington, Seattle, WA, USA
| | - Cody L McDonald
- 1 Department of Rehabilitation Medicine, University of Washington, Seattle, WA, USA
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Dakhil N, Evin M, Llari M, Mo F, Thefenne L, Liu T, Behr M. Is skin pressure a relevant factor for socket assessment in patients with lower limb amputation? Technol Health Care 2019; 27:669-677. [PMID: 31033471 DOI: 10.3233/thc-191637] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND Prosthetic rehabilitation improves the overall quality of life of patients, despite discomfort and medical complications. No quantitative assessment of prosthesis-patient interaction is used in routine protocols and prosthesis quality still results from the manufacturer's know-how. OBJECTIVE Our objective is to investigate whether pressure can be a relevant factor for assessing socket adequacy. METHODS A total of 8 transtibial amputee volunteers took part in this experimental study. The protocol included static standing and 2 minutes walking tests while the stump-to-socket interface pressures were measured. Questionnaires on comfort and pain were also conducted. RESULTS During static standing test, maximum pressures were recorded in the proximal region of the leg, with a peak value reaching 121.1 ± 31.6 kPa. During dynamic tests, maximum pressures of 254.1 ± 61.2 kPa were recorded during the loading phase of the step. A significant correlation was found between the pain score and static maximum recorded pressure (r= 0.81). CONCLUSIONS The protocol proposed and evaluated in this study is a repeatable, easy-to-set quantified analysis of the patient to socket interaction while standing and walking. This approach is likely to improve feedback for prosthesis manufacturers and consequently the overall design of prostheses.
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Affiliation(s)
- Nawfal Dakhil
- Aix-Marseille University, IFSTTAR, Laboratoire de Biomécanique Appliquée, Marseille, France
| | - Morgane Evin
- Aix-Marseille University, IFSTTAR, Laboratoire de Biomécanique Appliquée, Marseille, France
| | - Maxime Llari
- Aix-Marseille University, IFSTTAR, Laboratoire de Biomécanique Appliquée, Marseille, France
| | - Fuhao Mo
- College of Mechanical and Vehicle Engineering, Hunan University, Changsha, Hunan, China
| | - Laurent Thefenne
- Service de Médecine Physique et Réadaptation, Hôpital Laveran, Marseille, France
| | - Tang Liu
- The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Michel Behr
- Aix-Marseille University, IFSTTAR, Laboratoire de Biomécanique Appliquée, Marseille, France
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Tran L, Caldwell R, Quigley M, Fatone S. Stakeholder perspectives for possible residual limb monitoring system for persons with lower-limb amputation. Disabil Rehabil 2018; 42:63-70. [PMID: 30182755 DOI: 10.1080/09638288.2018.1492634] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
Purpose: To gather ideas from lower-limb prosthesis users and certified prosthetists regarding possible residual limb monitoring system features and data presentation. We also gathered information on the type of residual limb problems typically encountered, how they currently manage those problems, and their ideas for methods to better manage them.Materials and methods: Two focus groups were held; one with certified prosthetists and another with lower-limb prosthesis users. Open-ended questions were used in a moderated discussion that was audio recorded, transcribed, and assessed using applied thematic analysis.Results and conclusions: Seven individuals participated in each focus group. Prosthetists came from a mix of practice settings, while prosthesis users were diverse in level of amputation, aetiology, and years of experience using lower-limb prostheses. Residual limb problems reported by participants were consistent with those in the literature. Participants suggested better managing residual limb problems through improved education, better detection of residual limb problems, and using sensor-based information to improve prosthetic technology. Participants favoured short-term use of a possible residual limb monitoring systems to troubleshoot residual limb problems, with temperature and pressure the most frequently mentioned measurements. Participants described that an ideal residual limb monitoring system would be lightweight, not interfere with prosthesis function, and result in benefits with regard to prosthetic care and socket function that outweighed inconveniences or concerns regarding system use. A potential positive of system use included having objective data for reimbursement justification, although it was pointed out that the residual limb monitoring system itself also needed to be reimbursable.Implications for RehabilitationStakeholders suggested better managing residual limb problems through improved education, better detection of residual limb problems, and using sensor-based information to improve prosthetic technology.Stakeholders favored short-term use of a possible system to troubleshoot residual limb problems, with temperature and pressure the most frequently mentioned measurements.Stakeholders described that an ideal residual limb monitoring system would be lightweight, not interfere with prosthesis function, and result in benefits with regard to prosthetic care and socket function that outweighs any inconveniences or concerns regarding system use.Stakeholders indicated that a potential positive of system use included having objective data for reimbursement justification, although it was pointed out that the residual limb monitoring system itself also needed to be reimbursable.
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Affiliation(s)
- Lilly Tran
- Northwestern University Prosthetics-Orthotics Center, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - Ryan Caldwell
- Northwestern University Prosthetics-Orthotics Center, Northwestern University Feinberg School of Medicine, Chicago, IL, USA.,Scheck & Siress Prosthetics, Orthotics, and Pedorthics, Schaumburg, IL, USA
| | - Matthew Quigley
- Discipline of Prosthetics and Orthotics, College of Science, Health and Engineering, La Trobe University, Bundoora, Australia
| | - Stefania Fatone
- Northwestern University Prosthetics-Orthotics Center, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
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Baars EC, Schrier E, Dijkstra PU, Geertzen JH. Prosthesis satisfaction in lower limb amputees: A systematic review of associated factors and questionnaires. Medicine (Baltimore) 2018; 97:e12296. [PMID: 30278503 PMCID: PMC6181602 DOI: 10.1097/md.0000000000012296] [Citation(s) in RCA: 55] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/05/2018] [Accepted: 08/16/2018] [Indexed: 12/04/2022] Open
Abstract
BACKGROUND Factors influencing patient satisfaction with a transtibial prosthesis have been studied fragmentarily. The aims of this systematic review were to review the literature regarding factors of influence on patient satisfaction with a transtibial prosthesis, to report satisfaction scores, to present an overview of questionnaires used to assess satisfaction and examine how these questionnaires operationalize satisfaction. METHODS A literature search was performed in PubMed, Embase, PsycInfo, CINAHL, Cochrane, and Web of Knowledge databases up to February 2018 to identify relevant studies. RESULTS Twelve of 1832 studies met the inclusion criteria. Sample sizes ranged from 14 to 581 participants, mean age ranged from 18 to 70 years, and time since amputation ranged from 3 to 39 years. Seven questionnaires assessed different aspects of satisfaction. Patient satisfaction was influenced by appearance, properties, fit, and use of the prosthesis, as well as aspects of the residual limb. These influencing factors were not relevant for all amputee patients and were related to gender, etiology, liner use, and level of amputation. No single factor was found to significantly influence satisfaction or dissatisfaction. Significant associations were found between satisfaction and gender, etiology, liner use, and level of amputation. CONCLUSION Relevance of certain factors for satisfaction was related to specific amputee patient groups. Questionnaires assessing satisfaction use different operationalizations, making comparisons between studies difficult.
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Affiliation(s)
| | - Ernst Schrier
- Department of Rehabilitation Medicine, Center for Rehabilitation
| | - Pieter U. Dijkstra
- Department of Rehabilitation Medicine, Center for Rehabilitation
- Department of Oral and Maxillofacial Surgery, University Medical Center Groningen, University of Groningen, Groningen, the Netherlands
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Tafti N, Hemmati F, Safari R, Karimi MT, Farmani F, Khalaf A, Mardani MA. A systematic review of variables used to assess clinically acceptable alignment of unilateral transtibial amputees in the literature. Proc Inst Mech Eng H 2018; 232:826-840. [PMID: 30088444 DOI: 10.1177/0954411918789450] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Prosthetic alignment is a subjective concept which lacks reliability. The outcome responsiveness to prosthetic alignment quality could help to improve subjective and instrument assisted prosthetic alignment. This study was aimed to review variables used to assess clinically acceptable alignment in the literature. The search was done in some databases including: Google Scholar, PubMed, EBSCO, EMBASE, ISI Web of Knowledge and Scopus. The first selection criterion was based on abstracts and titles to address the research questions of interest. The American Academy of Orthotics and Prosthetics checklists were used for paper risk of bias assessment. A total of 25 studies were included in this study. Twenty-four studies revealed the critics of standing position or walking to locate clinically acceptable alignment, only one study measured outcomes in both situations. A total of 253 adults with transtibial amputations and mean age of 48.71 years participated in included studies. The confidence level of included studies was low to moderate, and before-after trial was the most common study design (n = 19). The joint angle, load line location with respect to joints and center of pressure-related parameters were reported as sensitive outcomes to prosthetic alignment quality in standing posture. The amount of forces at various parts of gait cycle and time of events were sensitive to prosthetic alignment quality during walking. Standing balance and posture and temporal parameters of walking could help to locate clinically acceptable alignment.
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Affiliation(s)
- Nahid Tafti
- 1 Student Research Committee, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran
| | - Fatemeh Hemmati
- 1 Student Research Committee, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran
| | - Reza Safari
- 2 Health and Social Care Research Centre, University of Derby, Derby, England
| | - Mohammad Taghi Karimi
- 3 Rehabilitation Sciences Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Farzad Farmani
- 4 Department of Orthotics and Prosthetics, Hamedan University of Medical Sciences, Hamedan, Iran
| | - Ali Khalaf
- 5 Department of Orthotics and Prosthetics, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran
| | - Mohammad Ali Mardani
- 5 Department of Orthotics and Prosthetics, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran
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Al-Fakih EA, Abu Osman NA, Mahmad Adikan FR. Techniques for Interface Stress Measurements within Prosthetic Sockets of Transtibial Amputees: A Review of the Past 50 Years of Research. SENSORS 2016; 16:s16071119. [PMID: 27447646 PMCID: PMC4970162 DOI: 10.3390/s16071119] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/18/2016] [Revised: 05/12/2016] [Accepted: 06/02/2016] [Indexed: 11/18/2022]
Abstract
The distribution of interface stresses between the residual limb and prosthetic socket of a transtibial amputee has been considered as a direct indicator of the socket quality fit and comfort. Therefore, researchers have been very interested in quantifying these interface stresses in order to evaluate the extent of any potential damage caused by the socket to the residual limb tissues. During the past 50 years a variety of measurement techniques have been employed in an effort to identify sites of excessive stresses which may lead to skin breakdown, compare stress distributions in various socket designs, and evaluate interface cushioning and suspension systems, among others. The outcomes of such measurement techniques have contributed to improving the design and fitting of transtibial sockets. This article aims to review the operating principles, advantages, and disadvantages of conventional and emerging techniques used for interface stress measurements inside transtibial sockets. It also reviews and discusses the evolution of different socket concepts and interface stress investigations conducted in the past five decades, providing valuable insights into the latest trends in socket designs and the crucial considerations for effective stress measurement tools that lead to a functional prosthetic socket.
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Affiliation(s)
- Ebrahim A Al-Fakih
- Department of Biomedical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur 50603, Malaysia.
| | - Noor Azuan Abu Osman
- Department of Biomedical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur 50603, Malaysia.
| | - Faisal Rafiq Mahmad Adikan
- Department of Electrical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur 50603, Malaysia.
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Tang J, McGrath M, Laszczak P, Jiang L, Bader DL, Moser D, Zahedi S. Characterisation of dynamic couplings at lower limb residuum/socket interface using 3D motion capture. Med Eng Phys 2015; 37:1162-8. [DOI: 10.1016/j.medengphy.2015.10.004] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2015] [Revised: 10/01/2015] [Accepted: 10/08/2015] [Indexed: 11/24/2022]
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