Abstract
Abstract Compression therapy using bandages or socks is the most common treatment for venous leg ulcers and edema. This article aims to compare the compression between long- and short-stretch bandages (LSB and SSB, respectively). Load-elongation curves, cyclic loading, and elastic recovery are investigated for both Cotton/Polyamide/Polyurethane and 100% bleached cotton bandages as LSB and SSB, respectively. Static (resting) and dynamic (working) pressures are measured on seven male legs, 31 ± 3.6 years old, using both two and three layers bandaging. Picopress pressure tests are performed on the ankle and mid-calf positions at gradual decreasing compression from the ankle to the knee. The deviation percentage between the experimental results by Picopress and theoretical calculations using Laplace's law and Al-Khaburi equations is compared. LSB recovered approximately 99% of its original length after stress-relaxation whereas SSB recovered only 93% of its original length after 5 days of cyclic load-relaxation. Moreover, SSB lost approximately 28.6% of its activity after wearing on the human leg for 5 days.
Highlights
When the CO-PA-PU bandage was extended to 120%; it had achieved approximately 14.15N, see Figure 6
Bandage pressures using Picopress were evaluated during the Cotton and CO-PA-PU woven compression bandages (WCBs) application for ankle and midcalf position using two and three wraps bandaging techniques
Short-stretch bandage (SSB) can be applied for severe leg ulcers and edema cases that need high pressure ranges 50–70 mmHg depending on bandage extension and number of layers
Summary
Definition and application of long and short-stretch compression bandages. Long-stretch bandage (LSB) can be defined as “an elastic compression bandage (CB) that contains elastic filament (rubber, Lycra, or elastane) which allows the bandage to stretch more than 120% of its original length”; it can be applied smoothly and conformed according to the contour of the human leg. Short-stretch bandage (SSB) can be defined as “elastic CB, is composed of cotton yarns, but usually it’s highly twisted yarns (1,200–2,300 turns/m) [1], these yarns are interwoven to enable the bandage’s original length to be extended by almost 60– 70% during application.”. Static Stiffness Index (SSI) is defined as the difference between the interface pressures when someone is standing or lying (mmHg) divided by 1 cm. The pressure peaks at walking action are slightly higher than for standing conditions [8]
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