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Active Wearable Compression with Shape Memory Actuators for Treating Chronic Edema

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Chronic edema can occur from impairment of the lymphatic, arterial, and venous systems. It can be a lifelong condition where self-care and treatment are necessary to manage the progressive worsening of the disease, which can lead to increased risk for infection, cellulitis, ulceration, wound, and amputation. At-home treatment options for this chronic debilitating disease are very limited. Existing PCDs have been around for several decades and have several major disadvantages. SMA embodied in a novel NPCD format allows for opportunity to address some of these disadvantages. Comparison of the two types of compression devices SMA-based NPCD and traditional PCD are evaluated and discussed in this study. Pressures were compared on both silicon and human subjects and visualization of applied pressure was also analyzed. Both devices provide comparable pressure range though PCD has higher variability in terms of uniformity of pressure applied. NPCD using SMA offers new treatment opportunity for patients with chronic edema at home in an entirely mobile and wearable platform.

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This study was funded by Koya Medical, Inc.

Conflict of interest

Ms. Rodrick and Dr. Hettrick serve as advisors to Koya Medical, Inc. Mr. Pamplin, Mr. Baldwin, and Dr. Doraiswamy are employed by Koya Medical, Inc.

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Correspondence to Anand Doraiswamy.

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This invited article is part of a special topical focus in the journal Shape Memory and Superelasticity on Cardiovascular Nitinol Medical Devices. The issue was organized by Dr. Srinidhi Nagaraja, G.RAU, Inc. and Dr. Harshad M. Paranjape, Confluent Medical Technologies, Inc.

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Pamplin, J., Baldwin, J., Rodrick, J. et al. Active Wearable Compression with Shape Memory Actuators for Treating Chronic Edema. Shap. Mem. Superelasticity 8, 142–149 (2022).

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