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Öztürk Ö, Şahin D, Acar AÖ, Saldiran TÇ, Uzun NN, Şen N, Tezcan ME. Performance of myotonometer in the assessment of skin involvement in systemic sclerosis. Clin Rheumatol 2024; 43:695-705. [PMID: 38114818 DOI: 10.1007/s10067-023-06848-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2023] [Revised: 12/10/2023] [Accepted: 12/14/2023] [Indexed: 12/21/2023]
Abstract
OBJECTIVES A clinically practical tool to assess skin biomechanical properties rapidly and accurately is still lacking. Our aim was to examine the intra- and inter-observer reproducibility of a myotonometer for objective skin property assessment in systemic sclerosis (SSc), comparing it with the modified Rodnan skin score (mRSS), and distinguishing patients from healthy controls. METHOD Thirty-four patients (21 limited and 13 diffuse SSc), and 31 age and gender-matched healthy controls were enrolled. Skin tone and stiffness were measured at four different anatomical sites (the forearm, hand, leg, and foot) using a myotonometer. The correlation between the mRSS and skin properties was assessed. Also, hand functionality was evaluated for possible correlations between the variables. The differences in skin properties between dcSSc and lcSSc patients, and healthy controls were assessed using variance analysis. RESULTS Intra- and inter-examiner reproducibility were excellent (ICC = 0.70 to 0.98) for tone and stiffness except for non-dominant hand tone, which showed good reliability (ICC = 0.64 to 0.74). Stiffness and tone values of the hands, forearms, and feet significantly correlated with mRSS total score (r = 0.40 to 0.71, p < 0.05). Additionally, tone and stiffness of the hands and forearms moderately correlated with hand function (p < 0.05). Tone and stiffness values increased in patients with dcSSc compared to healthy controls, or patients with lcSSc, at the hands, forearms, and legs (p < 0.05). CONCLUSIONS Our findings emphasize the potential utility of the myotonometer for assessing skin properties and differentiating SSc patients from controls, demonstrating its promise as a valuable clinical evaluation tool in this context. Key Points •The myotonometer displayed excellent intra- and inter-examiner reproducibility for assessing skin properties. •Skin tone and stiffness parameters well correlated with the mRSS scores. •The myotonometer can distinguish patients with diffuse cutaneous SSc from healthy controls.
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Affiliation(s)
- Özgül Öztürk
- Department of Physiotherapy and Rehabilitation, Acıbadem Mehmet Ali Aydınlar University, Kayışdağı St, No:32, Ataşehir, Istanbul, 34752, Turkey.
| | - Duygu Şahin
- Department of Rheumatology, Istanbul Dr. Lütfi Kırdar Kartal City Hospital, Istanbul, Turkey
| | - Ali Ömer Acar
- Department of Physiotherapy and Rehabilitation, Acıbadem Mehmet Ali Aydınlar University, Kayışdağı St, No:32, Ataşehir, Istanbul, 34752, Turkey
| | - Tülay Çevik Saldiran
- Department of Physiotherapy and Rehabilitation, Bitlis Eren University, Bitlis, Turkey
| | - Nihan Neval Uzun
- Department of Rheumatology, Istanbul Dr. Lütfi Kırdar Kartal City Hospital, Istanbul, Turkey
| | - Nesrin Şen
- Department of Rheumatology, Istanbul Dr. Lütfi Kırdar Kartal City Hospital, Istanbul, Turkey
| | - Mehmet Engin Tezcan
- Department of Rheumatology, Istanbul Dr. Lütfi Kırdar Kartal City Hospital, Istanbul, Turkey
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Ghosh S, Baker L, Chen F, Khera Z, Vain A, Zhang K, Hood A, Smith H, Chen H, Jagasia M, Tkaczyk E. Interrater reproducibility of the Myoton and durometer devices to quantify sclerotic chronic graft-versus-host disease. Arch Dermatol Res 2023; 315:2545-2554. [PMID: 37227518 DOI: 10.1007/s00403-023-02626-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Revised: 03/30/2023] [Accepted: 04/10/2023] [Indexed: 05/26/2023]
Abstract
Chronic graft-versus-host disease (cGVHD) is a severe complication in long-term survivors of allogeneic hematopoietic stem cell transplantation. This disease is challenging to manage clinically due to a lack of validated tools to quantitatively measure skin sclerosis. The current gold standard for measuring skin sclerosis is the NIH Skin Score which has only moderate agreement among clinicians and experts. To more accurately assess skin sclerosis in cGVHD, the Myoton and durometer devices can be used to directly measure biomechanical parameters of the skin. However, the reproducibility of these devices is not known in patients with cGVHD. To determine this reproducibility, three observers independently measured 10 anatomic sites in each of seven patients with sclerotic cGVHD using the Myoton and durometer. Clinical reproducibility was measured by mean pairwise differences (U-statistic) and intraclass correlation coefficients (ICCs) with 95% confidence intervals (CIs). Mean pairwise differences, expressed in true physical units, were used to report typical errors for each anatomic site and device. Mean pairwise differences were less than 11% of the average overall values for all five Myoton parameters and durometer hardness. These were lower for Myoton creep (4.1%), relaxation time (4.7%), and frequency (5.1%) than decrement (9.0%), stiffness (10.4%), and durometer hardness (9.0%). Myoton parameters creep, relaxation time, and frequency showed promise for capturing skin biomechanics more accurately than Myoton stiffness, decrement, or durometer hardness. Mean pairwise differences trended highest in the shin and volar forearm and lowest in the dorsal forearm. The interobserver ICC for overall (averaged across all measured body sites of a patient) creep (0.94; 95% CI 0.87-1.00), relaxation time (0.96; 95% CI 0.90-1.00), and frequency (0.95; 95% CI 0.88-1.00), trended higher than that for decrement (0.43; 95% CI 0.00-0.88), stiffness (0.92; 95% CI 0.81-1.00), and durometer hardness (0.82; 95% CI 0.61-1.00). Similar trends were observed in healthy participants. These findings can help clinicians design better studies to assess therapeutic response to new cGVHD treatments and support the interpretation of future measurements.
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Affiliation(s)
- Shramana Ghosh
- Dermatology and Research Services, Department of Veterans Affairs, Tennessee Valley Healthcare System, Nashville, TN, USA
- Vanderbilt Dermatology Translational Research Clinic, Department of Dermatology, Vanderbilt University Medical Center, TN, Nashville, USA
| | - Laura Baker
- Dermatology and Research Services, Department of Veterans Affairs, Tennessee Valley Healthcare System, Nashville, TN, USA
- Vanderbilt Dermatology Translational Research Clinic, Department of Dermatology, Vanderbilt University Medical Center, TN, Nashville, USA
| | - Fuyao Chen
- Dermatology and Research Services, Department of Veterans Affairs, Tennessee Valley Healthcare System, Nashville, TN, USA
- Vanderbilt Dermatology Translational Research Clinic, Department of Dermatology, Vanderbilt University Medical Center, TN, Nashville, USA
- Department of Biomedical Engineering, Vanderbilt University, Nashville, TN, USA
- Medical Scientist Training Program, Yale School of Medicine, New Haven, CT, USA
| | - Zain Khera
- Vanderbilt Dermatology Translational Research Clinic, Department of Dermatology, Vanderbilt University Medical Center, TN, Nashville, USA
| | - Arved Vain
- Vanderbilt Dermatology Translational Research Clinic, Department of Dermatology, Vanderbilt University Medical Center, TN, Nashville, USA
- University of Tartu Institute of Physics, Tartu, Estonia
| | - Kathy Zhang
- Vanderbilt Dermatology Translational Research Clinic, Department of Dermatology, Vanderbilt University Medical Center, TN, Nashville, USA
| | - Alexis Hood
- Vanderbilt Dermatology Translational Research Clinic, Department of Dermatology, Vanderbilt University Medical Center, TN, Nashville, USA
| | - Hayden Smith
- Vanderbilt Dermatology Translational Research Clinic, Department of Dermatology, Vanderbilt University Medical Center, TN, Nashville, USA
| | - Heidi Chen
- Department of Biostatistics, Vanderbilt University Medical Center, Nashville, TN, USA
- Vanderbilt-Ingram Cancer Center, Nashville, TN, USA
| | | | - Eric Tkaczyk
- Dermatology and Research Services, Department of Veterans Affairs, Tennessee Valley Healthcare System, Nashville, TN, USA.
- Vanderbilt Dermatology Translational Research Clinic, Department of Dermatology, Vanderbilt University Medical Center, TN, Nashville, USA.
- Department of Biomedical Engineering, Vanderbilt University, Nashville, TN, USA.
- Vanderbilt-Ingram Cancer Center, Nashville, TN, USA.
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Glassman GE, Dellalana L, Tkaczyk ER, Esteve IM, Huang JY, Cronin A, Patrinely JR, Etemad S, Assi PE, Ridner S, Forte AJ, Kassis SA, Perdikis G. Measuring Biomechanical Properties Using a Noninvasive Myoton Device for Lymphedema Detection and Tracking: A Pilot Study. EPLASTY 2022; 22:e54. [PMID: 36448050 PMCID: PMC9664374] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Subscribe] [Scholar Register] [Indexed: 04/27/2023]
Abstract
Background Improved techniques for lymphedema detection and monitoring of disease progression are needed. This study aims to use the noninvasive MyotonPRO Device to detect differences in biomechanical skin characteristics in patients with breast cancer-related lymphedema (BCRL). Methods The handheld Myoton device was used to measure skin parameters including dynamic skin stiffness, oscillation frequency (tone), mechanical stress relaxation time, and creep in 11 women diagnosed with BCRL. Seven anatomical sites were measured bilaterally for each participant. The average values in the affected arms were compared with those in the contralateral unaffected arms. Results Among the 11 female participants with unilateral BCRL Stages 0 to II, the combined averages for dynamic skin stiffness and frequency measurements were decreased in the affected arms when compared with those for the contralateral control arms (ratio < 1). The median ratio of stiffness (affected to unaffected control arm) was 0.91 (interquartile range [IQR] 0.78-1.03) while frequency was 0.94 (IQR 0.89-1.0). Skin relaxation time and creep averages were increased in the affected arms. The relaxation time median ratio (affected to unaffected control arm) was 1.07 (IQR 1.02-1.14) and the median ratio of creep was 1.06 (IQR 1.03-1.16). Conclusions This study suggests the Myoton can detect differences in skin biomechanical parameters of the affected and unaffected arms in patients with BCRL. Larger studies are needed to draw strong conclusions.
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Affiliation(s)
- Gabriella E Glassman
- Department of Plastic Surgery, Vanderbilt University Medical Center, Nashville, TN
| | - Laura Dellalana
- Department of Veterans Affairs and Vanderbilt Dermatology Translational Research Clinic (VDTRC.org), Nashville, TN
| | - Eric R Tkaczyk
- Department of Veterans Affairs and Vanderbilt Dermatology Translational Research Clinic (VDTRC.org), Nashville, TN
- Vanderbilt University School of Medicine, Nashville, TN
- Vanderbilt-Ingram Cancer Center, Nashville, TN
| | | | | | - Austin Cronin
- Department of Veterans Affairs and Vanderbilt Dermatology Translational Research Clinic (VDTRC.org), Nashville, TN
| | | | | | - Patrick E Assi
- Department of Plastic Surgery, Vanderbilt University Medical Center, Nashville, TN
| | | | - Antonio Jorge Forte
- Division of Plastic and Reconstructive Surgery, Mayo Clinic Jacksonville, FL
| | - Salam Al Kassis
- Department of Plastic Surgery, Vanderbilt University Medical Center, Nashville, TN
| | - Galen Perdikis
- Department of Plastic Surgery, Vanderbilt University Medical Center, Nashville, TN
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Abstract
Skin biomechanical parameters (dynamic stiffness, frequency, relaxation time, creep, and decrement) measured using a myotonometer (MyotonPRO) could inform the management of sclerotic disease. To determine which biomechanical parameter(s) can accurately differentiate patients with sclerotic chronic graft-versus-host disease from post–hematopoietic cell transplant controls, 15 patients with sclerotic chronic graft-versus-host disease and 11 post–hematopoietic cell transplant controls were measured with the myotonometer on 18 anatomic sites. Logistic regression and two machine learning algorithms (least absolute shrinkage and selection operator regression and random forest) were developed to classify subjects. In univariable analysis, frequency had the highest overfit-corrected area under the curve (0.91). Backward stepwise selection and random forest machine learning identified frequency and relaxation time as the optimal parameters for differentiating patients with sclerotic chronic graft-versus-host disease from post–hematopoietic cell transplant controls. Least absolute shrinkage and selection operator regression selected the combination of frequency and relaxation time (overfit-corrected area under the curve = 0.87). Discriminatory ability was maintained when only the sites accessible while the patient is supine (12 sites) were used. We report the distribution of values for these highly discriminative biomechanical parameters, which could inform the assessment of disease severity in future quantitative biomechanical studies of sclerotic chronic graft-versus-host disease.
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Rosicka K, Mierzejewska-Krzyżowska B, Mrówczyński W. Skin biomechanical and viscoelastic properties measured with MyotonPRO in different areas of human body. Skin Res Technol 2021; 28:236-245. [PMID: 34751466 PMCID: PMC9907614 DOI: 10.1111/srt.13116] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Accepted: 10/16/2021] [Indexed: 11/30/2022]
Abstract
BACKGROUND There is still a lack of clinically practical device, which allows to perform rapid and accurate examination of the skin condition. For this reason, suitability of the MyotonPRO for the assessment of skin biomechanical and viscoelastic parameters was evaluated in this study. The aim of the study was to establish the reference values of five parameters measured by MyotonPRO various locations of human skin. MATERIALS AND METHODS Oscillation frequency, dynamic stiffness, logarithmic decrement, mechanical stress relaxation and creep were measured at three different skin locations (clavicula, volar forearm and shin), using L-shape short and medium arm probes in 32 young female volunteers. Mean values of obtained parameters recorded by both probes were compared among three skin locations while reliabilities of measurements were assessed. Additionally, relationships between all recorded parameters were examined RESULTS: There were no statistically significant differences between the mean values of five measured parameters obtained with both probes in all investigated areas. However, statistically significant differences of mean values of almost all parameters measured among three places examined were found. Despite considerable differences in mean values of obtained parameters, there were visible strong correlations between some studied parameters in all three investigated areas of skin. CONCLUSION It was demonstrated in all locations studied that the higher value of oscillation frequency corresponds to the higher value of dynamic stiffness, moreover such tissue recovers faster to its initial shape, and it was characterized by lower creep values. Such results indicate the existence of identical relationships between the same studied parameters in different areas of skin.
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Affiliation(s)
- Katarzyna Rosicka
- Department of Biological Sciences, Faculty of Physical Culture, Poznań University of Physical Education, Gorzów Wielkopolski, Poland
| | - Barbara Mierzejewska-Krzyżowska
- Department of Biological Sciences, Faculty of Physical Culture, Poznań University of Physical Education, Gorzów Wielkopolski, Poland
| | - Włodzimierz Mrówczyński
- Department of Neurobiology, Faculty of Health Sciences, Poznań University of Physical Education, Poznań, Poland
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Rosicka K, Hill M, Wdowski MM. Skin anisotropy: Finding the optimal incision line for volar forearm in males and females. J Mech Behav Biomed Mater 2021; 124:104805. [PMID: 34474321 DOI: 10.1016/j.jmbbm.2021.104805] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Revised: 08/26/2021] [Accepted: 08/27/2021] [Indexed: 11/26/2022]
Abstract
PURPOSE Proper understanding of skin biomechanics, viscoelasticity and investigation of skin tension vectors is necessary to find optimal incision lines. Great tension across a healing wound after any surgical procedure might lead to forming hypertrophic scars. The aim of the study was to investigate tension lines in volar forearm skin in young males and females, in order to ensure best incision line. METHODS Five biomechanical and viscoelastic parameters were measured using a hand-held myotonometer: Oscillation Frequency [Hz], Dynamic Stiffness [N/m], Logarithmic Decrement of tissue's natural oscillation, Mechanical Stress Relaxation Time [ms], and Creep. Measurements were taken in four different directions; Along Forearm, Across Forearm, Along Langer's Line and Across Langer's Line. RESULTS Significant main effects for direction were found for Oscillation Frequency (p < 0.001, η2 = 0.371) [Hz], Dynamic Stiffness (p < 0.001, η2 = 0.522) [N/m], Logarithmic Decrement (p < 0.001, η2 = 0.083), Mechanical Stress Relaxation Time (p < 0.001, η2 = 0.494) [ms] and Creep (p < 0.001, η2 = 0.480). For each parameter except for logarithmic decrement results obtained Along Langers Line and Across Forearm were significantly different to Across Langers Line and Along Forearm (p < 0.001, d = -2.76 - 2.66). Significant main effects for sex were found for logarithmic decrement Along Forearm (p < 0.001, d = 1.698) and Across Langer's Line (p = 0.021, d = 1.697). CONCLUSIONS Our results suggested that optimal incision line for this age group in males and females could potentially be performed diagonally i.e. Across Langer's Line or parallel i.e. Along Forearm to forearm axis. These directions would provide the lowest tension across a healing wound and possibly minimalize the risk of hypertrophic scarring post incision.
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Affiliation(s)
- K Rosicka
- Department of Biological Sciences, Faculty of Physical Culture in Gorzów Wlkp., Poznań University of Physical Education, Gorzów Wlkp, Poland.
| | - M Hill
- Centre for Sport, Exercise and Life Sciences, School of Life Sciences, Coventry University, United Kingdom
| | - M M Wdowski
- Centre for Sport, Exercise and Life Sciences, School of Life Sciences, Coventry University, United Kingdom
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National Institutes of Health Consensus Development Project on Criteria for Clinical Trials in Chronic Graft-versus-Host Disease: IV. The 2020 Highly morbid forms report. Transplant Cell Ther 2021; 27:817-835. [PMID: 34217703 DOI: 10.1016/j.jtct.2021.06.001] [Citation(s) in RCA: 61] [Impact Index Per Article: 20.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Accepted: 06/01/2021] [Indexed: 12/12/2022]
Abstract
Chronic graft-versus-host disease (GVHD) can be associated with significant morbidity, in part because of nonreversible fibrosis, which impacts physical functioning (eye, skin, lung manifestations) and mortality (lung, gastrointestinal manifestations). Progress in preventing severe morbidity and mortality associated with chronic GVHD is limited by a complex and incompletely understood disease biology and a lack of prognostic biomarkers. Likewise, treatment advances for highly morbid manifestations remain hindered by the absence of effective organ-specific approaches targeting "irreversible" fibrotic sequelae and difficulties in conducting clinical trials in a heterogeneous disease with small patient numbers. The purpose of this document is to identify current gaps, to outline a roadmap of research goals for highly morbid forms of chronic GVHD including advanced skin sclerosis, fasciitis, lung, ocular and gastrointestinal involvement, and to propose strategies for effective trial design. The working group made the following recommendations: (1) Phenotype chronic GVHD clinically and biologically in future cohorts, to describe the incidence, prognostic factors, mechanisms of organ damage, and clinical evolution of highly morbid conditions including long-term effects in children; (2) Conduct longitudinal multicenter studies with common definitions and research sample collections; (3) Develop new approaches for early identification and treatment of highly morbid forms of chronic GVHD, especially biologically targeted treatments, with a special focus on fibrotic changes; and (4) Establish primary endpoints for clinical trials addressing each highly morbid manifestation in relationship to the time point of intervention (early versus late). Alternative endpoints, such as lack of progression and improvement in physical functioning or quality of life, may be suitable for clinical trials in patients with highly morbid manifestations. Finally, new approaches for objective response assessment and exploration of novel trial designs for small populations are required.
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Kitko CL, Pidala J, Schoemans HM, Lawitschka A, Flowers ME, Cowen EW, Tkaczyk E, Farhadfar N, Jain S, Steven P, Luo ZK, Ogawa Y, Stern M, Yanik GA, Cuvelier GDE, Cheng GS, Holtan SG, Schultz KR, Martin PJ, Lee SJ, Pavletic SZ, Wolff D, Paczesny S, Blazar BR, Sarantopoulos S, Socie G, Greinix H, Cutler C. National Institutes of Health Consensus Development Project on Criteria for Clinical Trials in Chronic Graft-versus-Host Disease: IIa. The 2020 Clinical Implementation and Early Diagnosis Working Group Report. Transplant Cell Ther 2021; 27:545-557. [PMID: 33839317 PMCID: PMC8803210 DOI: 10.1016/j.jtct.2021.03.033] [Citation(s) in RCA: 64] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Accepted: 03/31/2021] [Indexed: 12/11/2022]
Abstract
Recognition of the earliest signs and symptoms of chronic graft-versus-host disease (GVHD) that lead to severe manifestations remains a challenge. The standardization provided by the National Institutes of Health (NIH) 2005 and 2014 consensus projects has helped improve diagnostic accuracy and severity scoring for clinical trials, but utilization of these tools in routine clinical practice is variable. Additionally, when patients meet the NIH diagnostic criteria, many already have significant morbidity and possibly irreversible organ damage. The goals of this early diagnosis project are 2-fold. First, we provide consensus recommendations regarding implementation of the current NIH diagnostic guidelines into routine transplant care, outside of clinical trials, aiming to enhance early clinical recognition of chronic GVHD. Second, we propose directions for future research efforts to enable discovery of new, early laboratory as well as clinical indicators of chronic GVHD, both globally and for highly morbid organ-specific manifestations. Identification of early features of chronic GVHD that have high positive predictive value for progression to more severe manifestations of the disease could potentially allow for future pre-emptive clinical trials.
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Affiliation(s)
- Carrie L Kitko
- Department of Pediatrics, Vanderbilt University Medical Center, Nashville, Tennessee.
| | - Joseph Pidala
- Blood and Marrow Transplantation and Cellular Immunotherapy, Moffitt Cancer Center, Tampa, Florida
| | - Hélène M Schoemans
- Department of Hematology, University Hospitals Leuven and KU Leuven, Leuven, Belgium
| | - Anita Lawitschka
- St. Anna Children's Hospital, Children's Cancer Research Institute, Vienna, Austria
| | - Mary E Flowers
- Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, Washington; Department of Medicine, University of Washington, Seattle, Washington
| | - Edward W Cowen
- Dermatology Branch, National Institute of Arthritis and Musculoskeletal and Skin Diseases, Bethesda, Maryland
| | - Eric Tkaczyk
- Research & Dermatology Services, Department of Veterans Affairs, Nashville, Tennessee; Vanderbilt Dermatology Translational Research Clinic, Department of Dermatology, Vanderbilt University Medical Center, Nashville, Tennessee; Vanderbilt-Ingram Cancer Center, Nashville, Tennessee
| | - Nosha Farhadfar
- Division of Hematology/Oncology, University of Florida College of Medicine, Gainesville, Florida
| | - Sandeep Jain
- Department of Ophthalmology, University of Illinois at Chicago, Chicago, Illinois
| | - Philipp Steven
- Division for Dry-Eye Disease and Ocular GVHD, Department of Ophthalmology, Medical Faculty and University Hospital, University of Cologne, Cologne, Germany
| | - Zhonghui K Luo
- Department of Ophthalmology, Massachusetts Eye and Ear, Harvard University, Boston, Massachusetts
| | - Yoko Ogawa
- Department of Ophthalmology, Keio University School of Medicine, Tokyo, Japan
| | - Michael Stern
- Department of Ophthalmology, University of Illinois at Chicago, Chicago, Illinois; ImmunEyez LLC, Irvine, California
| | - Greg A Yanik
- Department of Pediatrics, University of Michigan, Ann Arbor, Michigan
| | - Geoffrey D E Cuvelier
- Pediatric Blood and Marrow Transplantation, Department of Pediatric Oncology-Hematology-BMT, CancerCare Manitoba, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Guang-Shing Cheng
- Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, Washington; Department of Medicine, University of Washington, Seattle, Washington
| | - Shernan G Holtan
- Division of Hematology, Oncology, and Transplantation, Department of Medicine, University of Minnesota, Minneapolis, Minnesota
| | - Kirk R Schultz
- Pediatric Hematology/Oncology/BMT, BC Children's Hospital, Vancouver, British Columbia, Canada
| | - Paul J Martin
- Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, Washington; Department of Medicine, University of Washington, Seattle, Washington
| | - Stephanie J Lee
- Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, Washington; Department of Medicine, University of Washington, Seattle, Washington
| | - Steven Z Pavletic
- Center for Cancer Research, National Cancer Institute, Bethesda, Maryland
| | - Daniel Wolff
- Department of Internal Medicine III, University Hospital of Regensburg, Regensburg, Germany
| | - Sophie Paczesny
- Department of Microbiology and Immunology, Department of Pediatrics, Medical University of South Carolina, Charleston, South Carolina
| | - Bruce R Blazar
- Department of Pediatrics, Division of Blood & Marrow Transplantation & Cellular Therapy, University of Minnesota, Minneapolis, Minnesota
| | - Stephanie Sarantopoulos
- Division of Hematological Malignancies and Cellular Therapy, Duke University Department of Medicine, Duke Cancer Institute, Durham, North Carolina
| | - Gerard Socie
- Hematology Transplantation, AP-HP Saint Louis Hospital & University of Paris, INSERM U976, Paris, France
| | - Hildegard Greinix
- Clinical Division of Hematology, Medical University of Graz, Graz, Austria
| | - Corey Cutler
- Division of Stem Cell Transplantation and Cellular Therapy, Dana-Farber Cancer Institute, Boston, Massachusetts
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Longitudinal tracking of skin dynamic stiffness to quantify evolution of sclerosis in chronic graft-versus-host disease. Bone Marrow Transplant 2020; 56:989-991. [PMID: 33279941 DOI: 10.1038/s41409-020-01158-w] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2020] [Revised: 11/11/2020] [Accepted: 11/16/2020] [Indexed: 11/08/2022]
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10
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Rosicka K, Mierzejewska-Krzyżowska B, Mrówczyński W. Comparison of different MyotonPRO probes for skin stiffness evaluation in young women. Skin Res Technol 2020; 27:332-339. [PMID: 33078499 DOI: 10.1111/srt.12946] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2020] [Accepted: 09/05/2020] [Indexed: 12/14/2022]
Abstract
BACKGROUND Stiffness of skin is widely used parameter in many research areas, for example cosmetic industry, dermatology or rheumatology for assessing of skin condition as well as changes occurring in skin. In this pioneering study, we conducted measurements of skin stiffness using MyotonPRO -novel tool, which was mainly used to evaluate biomechanical properties of muscles, ligaments and tendons. We expected that MyotonPRO , which shows great reproducibility in previous studies, will also be able to measure skin stiffness. MATERIALS AND METHODS Four replaceable probes designed by MyotonPRO (L-shape short and medium arm, standard cylindrical flat-end probe and the same standard probe with disc attachment ) were tested for measurement of skin stiffness in young women (30 healthy females) at three different locations (clavicula, volar forearm and shin). RESULTS There was no significant difference between stiffness values obtained with L-shape short and L-shape medium arm probes in all investigated areas. Stiffness values recorded by regular probe and regular probe with disc attachment differ significantly from those collected with L-shape probes. There was also significant difference between values of stiffness obtained by standard with disc attachment and standard probes. CONCLUSION Both L-shape probes show a great reliability for skin stiffness assessment. Therefore, MyotonPRO can be considered a reliable device for assessing skin stiffness.
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Affiliation(s)
- Katarzyna Rosicka
- Department of Biological Sciences, Faculty of Physical Culture in Gorzów Wlkp., Poznań University of Physical Education, Gorzów Wlkp., Poland
| | - Barbara Mierzejewska-Krzyżowska
- Department of Biological Sciences, Faculty of Physical Culture in Gorzów Wlkp., Poznań University of Physical Education, Gorzów Wlkp., Poland
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