Residual Limb Model for Osteointegration

2014 ◽  
pp. 179-188
Keyword(s):  
Residual Limb

scholarly journals Residual limb volume fluctuations in transfemoral amputees

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Linda Paternò ◽  
Michele Ibrahimi ◽  
Elisa Rosini ◽  
Giuseppe Menfi ◽  
Vito Monaco ◽  
...  
Keyword(s):  
Physical Activity ◽  
Test Session ◽  
Testing Time ◽  
Residual Limb ◽  
Limb Volume ◽  
Volume Fluctuations ◽  
Exponential Trend ◽  
Prosthesis Removal ◽  
Transfemoral Amputees ◽  
Time Required

AbstractThis study constitutes the first attempt to systematically quantify residual limb volume fluctuations in transfemoral amputees. The study was carried out on 24 amputees to investigate variations due to prosthesis doffing, physical activity, and testing time. A proper experimental set-up was designed, including a 3D optical scanner to improve precision and acceptability by amputees. The first test session aimed at measuring residual limb volume at 7 time-points, with 10 min intervals, after prosthesis doffing. This allowed for evaluating the time required for volume stabilization after prosthesis removal, for each amputee. In subsequent sessions, 16 residual limb scans in a day for each amputee were captured to evaluate volume fluctuations due to prosthesis removal and physical activity, in two times per day (morning and afternoon). These measurements were repeated in three different days, a week apart from each other, for a total of 48 scans for each amputee. Volume fluctuations over time after prosthesis doffing showed a two-term decay exponential trend (R2 = 0.97), with the highest variation in the initial 10 min and an average stabilization time of 30 min. A statistically significant increase in residual limb volume following both prosthesis removal and physical activity was verified. No differences were observed between measures collected in the morning and in the afternoon.Clinical Trials.gov ID: NCT04709367.

Residual-limb shape change: three-dimensional CT scan measurement and depiction in vivo.

Radiology ◽  
1996 ◽  
Vol 200 (3) ◽  
pp. 843-850 ◽  
Author(s):  
K E Smith ◽  
P K Commean ◽  
M W Vannier
Keyword(s):  
Ct Scan ◽  
Shape Change ◽  
Three Dimensional ◽  
Residual Limb

Transducer-based comparisons of the prosthetic feet used by transtibial amputees for different walking activities: a pilot study

2012 ◽  
Vol 36 (2) ◽  
pp. 203-216 ◽  
Author(s):  
Edward Schreiber Neumann ◽  
Kartheek Yalamanchili ◽  
Justin Brink ◽  
Joon S Lee
Keyword(s):  
Clinical Decision Making ◽  
Research Question ◽  
Case Series ◽  
Clinical Decision ◽  
Residual Limb ◽  
Convenience Sample ◽  
Loading Patterns ◽  
Prosthetic Feet ◽  
Transtibial Amputees ◽  
Resultant Forces

Background: Knowledge of transtibial residual limb force and moment loading during gait can be clinically useful. The research question was whether a transducer attached between the socket and pylon can be used to detect differences in loading patterns created by prosthetic feet of different design and different walking activities in real-world environments outside the gait lab. Objectives: To develop methods for obtaining, processing, analyzing and interpreting transducer measurements and examining their clinical usefulness. Study Design: Case series design. Methods: A convenience sample of four K3-K4 transtibial amputees and a wireless tri-axial transducer mounted distal to the socket. Activities included self-selected comfortable speed walking, and ascending and descending ramps and steps. Measurements taken about three orthogonal axes were processed to produce plots of normalized resultant force versus normalized resultant moment. Within-subject differences in peak resultant forces and moments were tested. Results: Loading patterns between feet and subjects and among the activities were distinctly different. Optimal loading of peak resultant forces tentatively might occur around 25% and 69% to73% of stance during self-selected comfortable walking. Ascending and descending ramps is useful for examining heel and forefoot response. Conclusions: Force-moment plots obtained from transducer data may assist clinical decision making. Clinical relevance A pylon-mounted transducer distal to the socket reveals the moments and forces transmitted to the residual limb and can be used to evaluate the loading patterns on the residual limb associated with different foot designs and different everyday activities outside the gait lab.

Toward improving residual limb climate within prostheses for persons with lower limb loss

2021 ◽  
Vol Publish Ahead of Print ◽  
Author(s):  
Ashley D Knight ◽  
Brad D Hendershot ◽  
Todd J Sleeman ◽  
Christopher L Dearth ◽  
Felix Starker ◽  
...  
Keyword(s):  
Lower Limb ◽  
Limb Loss ◽  
Residual Limb

scholarly journals Pattern recognition control of multifunction myoelectric prostheses by patients with congenital transradial limb defects: a preliminary study

2011 ◽  
Vol 35 (4) ◽  
pp. 395-401 ◽  
Author(s):  
Michael Kryger ◽  
Aimee E Schultz ◽  
Todd Kuiken
Keyword(s):  
Pattern Recognition ◽  
Success Factors ◽  
Performance Metrics ◽  
Cross Sectional Study ◽  
Residual Limb ◽  
Cross Sectional ◽  
Linear Discriminant ◽  
Myoelectric Prostheses ◽  
Preliminary Study ◽  
Emg Pattern Recognition

Background: Electromyography (EMG) pattern recognition offers the potential for improved control of multifunction myoelectric prostheses. However, it is unclear whether this technology can be successfully used by congenital amputees. Objective: The purpose of this investigation was to assess the ability of congenital transradial amputees to control a virtual multifunction prosthesis using EMG pattern recognition and compare their performance to that of acquired amputees from a previous study. Study Design: Preliminary cross-sectional study. Methods: Four congenital transradial amputees trained and tested a linear discriminant analysis (LDA) classifier with four wrist movements, five hand movements, and a no-movement class. Subjects then tested the classifier in real time using a virtual arm. Results: Performance metrics for the residual limb were poorer than those with the intact limb (classification accuracy: 52.1%±15.0% vs. 93.2%±15.8%; motion-completion rate: 49.0%±23.0% vs. 84.0%±9.4%; motion-completion time: 2.05±0.75 s vs. 1.13±0.05 s, respectively). On average, performance with the residual limb by congenital amputees was reduced compared to that reported for acquired transradial amputees. However, one subject performed similarly to acquired amputees. Conclusions: Pattern recognition control may be a viable option for some congenital amputees. Further study is warranted to determine success factors.

scholarly journals FE Analysis of Contact between Residual Limb and Socket during Simulation of Amputee Motion

2014 ◽  
Vol 11 (4) ◽  
pp. 381-388 ◽  
Author(s):  
Giorgio Colombo ◽  
Roberto Morotti ◽  
Caterina Rizzi
Keyword(s):  
Fe Analysis ◽  
Residual Limb

scholarly journals Within-subjects Effects of Standardized Prosthetic Socket Modifications on Physical Function and Patient-Reported Outcomes

2021 ◽  
Author(s):  
William Anderst ◽  
Goeran Fiedler ◽  
Kentaro Onishi ◽  
Gina McKernan ◽  
Tom Gale ◽  
...  
Keyword(s):  
Physical Function ◽  
Patient Reported Outcomes ◽  
Design Method ◽  
Pressure Sensors ◽  
Residual Limb ◽  
Prosthetic Socket ◽  
Large Patient ◽  
Increased Risk ◽  
Patient Reported ◽  
And Function

Abstract • Background: Among the challenges of living with lower limb loss is the increased risk of long-term health problems that can be either attributed directly to the amputation surgery and/or prosthetic rehabilitation or indirectly to a disability-induced sedentary lifestyle. These problems are exacerbated by poorly fit prosthetic sockets. There is a knowledge gap regarding how the socket design affects in-socket mechanics, and how in-socket mechanics affect patient-reported comfort and function. The objectives of this study are: 1) to gain a better understanding of how in-socket mechanics of the residual limb in transfemoral amputees are related to patient-reported comfort and function, 2) to identify clinical tests that can streamline the socket design process, and 3) to evaluate the efficacy and cost of a novel, quantitatively informed socket optimization process.• Methods: Users of transfemoral prostheses will be asked to walk on a treadmill wearing their current socket plus 8 different check sockets with designed changes in different structural measurements that are likely to induce changes in residual limb motion, skin strain, and pressure distribution within the socket. Dynamic biplane radiography and pressure sensors will be used to measure in-socket residual limb mechanics. Patient-reported outcomes will also be collected after wearing each socket. The effects of in-socket mechanics on both physical function and patient-reported outcomes (aim 1) will be assessed using a generalized linear model. Partial correlation analysis will be used to examine the association between research grade measurements and readily available clinical measurements (aim 2). In order to compare the new quantitative design method to the Standard of Care, patient reported outcomes and cost will be compared between the two methods, utilizing the Wilcoxon Mann-Whitney non-parametric test (aim 3).• Discussion: Knowledge on how prosthetic socket modifications affect residual bone and skin biomechanics itself can be applied to devise future socket designs, and the methodology can be used to investigate and improve such designs, past and present. Apart from saving time and costs, this may result in better prosthetic socket fit for a large patient population, thus increasing their mobility, participation, and overall health-related quality of life. • Trial registration: clinicaltrials.gov: NCT05041998

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