A thermal management device for a lower-limb prosthesis

Han, Yu; Liu, Fan; Dowd, Garrett; Zhe, Jiang

doi:10.1016/j.applthermaleng.2015.02.078

Cited by 20 publications

(12 citation statements)

References 18 publications

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“…A compact fan then moved the heat flux from the heat sink to the surrounding environment (Fig. 14c) [123]. The preliminary prototype showed a cooling capability ranging from 2.1 W to 7.0 W and it was able to maintain a constant temperature.…”

Section: B Existing Solutions To Avoid Stump Overheatingmentioning

confidence: 99%

Sockets for Limb Prostheses: A Review of Existing Technologies and Open Challenges

Paternò

Ibrahimi

Gruppioni

et al. 2018

IEEE Trans. Biomed. Eng.

195

204

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In the prosthetics field, one of the most important bottlenecks is still the human-machine interface, namely the socket. Indeed, a large number of amputees still rejects prostheses or points out a low satisfaction level, due to a sub-optimal interaction between the socket and the residual limb tissues. The aim of this paper is to describe the main parameters (displacements, stress, volume fluctuations and temperature) affecting the stump-socket interface and reducing the comfort/stability of limb prostheses. In this review, a classification of the different socket types proposed in the literature is reported, together with an analysis of advantages and disadvantages of the different solutions, from multiple viewpoints. The paper then describes the technological solutions available to face an altered distribution of stresses on the residual limb tissues, volume fluctuations affecting the stump overtime and temperature variations affecting the residual tissues within the socket. The open challenges in this research field are highlighted and the possible future routes are discussed, towards the ambitious objective of achieving an advanced socket able to self-adapt in real-time to the complex interplay of factors affecting the stump, during both static and dynamic tasks.

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Section: B Existing Solutions To Avoid Stump Overheatingmentioning

confidence: 99%

Sockets for Limb Prostheses: A Review of Existing Technologies and Open Challenges

Paternò

Ibrahimi

Gruppioni

et al. 2018

IEEE Trans. Biomed. Eng.

195

204

View full text Add to dashboard Cite

show abstract

“…Studies have employed thermocouples, thermography and hygrometer devices to monitor the microclimate at a loaded skin interface [ 47 ]. They have revealed elevated temperature and humidity values in the plantar aspects of the foot [ 48 ], the residual amputee stump-socket interface of amputees [ 49 ] or at tissues where high forces are transmitted through foot orthoses [ 50 ]. These changes will inevitably reduce the skin tolerance to mechanical-induced damage [ 51 – 53 ].…”

Section: A Bioengineering Approach Measurement and Simulationmentioning

confidence: 99%

Technologies to monitor the health of loaded skin tissues

Bader

Worsley

2018

BioMed Eng OnLine

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There are many situations where the skin and underlying soft tissues are compromised by mechanical loading in the form or pressure, or pressure in combination with shear. If sustained, this can lead to damage in the tissues particularly adjacent to bony prominences, resulting in chronic wounds. An array of bioengineering technologies have been adopted to assess the integrity of loaded soft tissues. This paper aims to review these approaches for the quantification, simulation and early detection of mechanically-induced skin damage. The review considers different measurements at the interface between the skin and support surface/medical device, involving pressure, shear, friction and the local microclimate. The potential of the techniques to monitor the physiological response of the skin to these external stimuli including biophysical measurement devices and sampling of biofluids are critically analysed. In addition, it includes an analysis of medical imaging technologies and computational modelling to provide a means by which tissue deformation can be quantified and thresholds for tissue damage defined. Bioengineering measurement and imaging technologies have provided an insight into the temporal status of loaded skin. Despite the advances in technology, to date, the translation to clinical tools which are robust and cost effective has been limited. There is a need to adapt existing technologies and simulation platforms to enable patients, carers and clinicians to employ appropriate intervention strategies to minimise soft tissue damage.

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“…To conclude, this note suggests that in scaled-down liner scenarios, passive heat transport solutions are unlikely to improve heat decay at a simulated prosthesis interface. Unless the thermal conductivity of elastomers can be increased beyond the elastomers used here, or suspension liners are radically rethought, active solutions used in the study of Han et al 22 and Ghoseiri et al 23 may be a more promising avenue to mitigate and prevent thermal discomfort for prosthesis wearers.…”

Section: Resultsmentioning

confidence: 99%

The effect of liner design and materials selection on prosthesis interface heat dissipation

Williams

Washington

Miodownik

et al. 2018

Prosthetics &Amp; Orthotics International

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Background and aim: Thermal discomfort often affects prosthesis wearers and could be addressed by increasing liner thermal conductivity. This note explores a liner made from thermally conductive silicone and two additional alternative liner designs.Technique: Thermally conductive silicone was used to create a conductive liner and a hybrid liner.Additionally, one with open elements was made. These were compared with a plain silicone liner and a no liner scenario. Scaled down liner prototypes were used due to the high-cost of the thermally conductive silicone. Temperature decay profiles were collected by attaching thermistors to a heated liner phantom and used to evaluate scenarios. Discussion:No scenario performed much better than the plain silicone liner. Implementation of passive solutions may be easier, but alternative liner materials are unlikely to affect dissipation enough to address thermal discomfort. Based on this work, future research efforts may be better spent developing active thermal discomfort solutions.Clinical relevance: Thermal discomfort can increase the probability of skin damage, reduce prosthesis satisfaction and, ultimately, the quality of life. The prosthesis-wearing experience could be improved if thermal discomfort can be addressed by technological improvements. BACKGROUND AND AIM

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A thermal management device for a lower-limb prosthesis

Cited by 20 publications

References 18 publications

Sockets for Limb Prostheses: A Review of Existing Technologies and Open Challenges

Sockets for Limb Prostheses: A Review of Existing Technologies and Open Challenges

Technologies to monitor the health of loaded skin tissues

The effect of liner design and materials selection on prosthesis interface heat dissipation

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