Abstract
Interface pressure applied by compression bandages is the therapeutic action of the treatment of some venous or lymphatic pathologies. The so-called Static Stiffness Index, which quantifies the pressure increase from supine to standing position, is usually used to differentiate compression bandages. It was hypothesized that this pressure increase was the consequence of a change in leg geometry (blood and muscle falling down) and a change in calf soft tissue mechanical properties (muscles contraction). Calf soft tissue global stiffness of both legs of 25 patients was characterized in a sitting and standing position. This characterization was combined with interface pressure measurements applied by six different bandages. Though soft tissue mechanical properties significantly increased from sitting to standing position, no correlation was observed with the corresponding pressure increase. Thus, pressure increase is mainly attributed to a change in leg geometry.
Highlights
Academic Editor: Gregory ChagnonInterface pressure is a key aspect of compression bandage therapy [1], which depends on the bandage mechanical properties [2], and on the patient morphology [3] and body position [4]
Bandages can be differentiated with regards to the interface pressure variation from supine to standing position, the so-called Static Stiffness Index [5], which is commonly used in clinical studies [6–8]
Calf soft tissues global stiffness was characterized for both legs of 25 patients in a sitting and standing position, thanks to the combination of a compression test and a finite element model updating method
Summary
Interface pressure is a key aspect of compression bandage therapy [1], which depends on the bandage mechanical properties [2], and on the patient morphology [3] and body position [4]. Bandages can be differentiated with regards to the interface pressure variation from supine to standing position, the so-called Static Stiffness Index [5], which is commonly used in clinical studies [6–8]. This study aimed at investigating the possible relationship between interface pressure and calf soft tissue global stiffness. The latter was measured on both legs of 25 patients in sitting and standing position. Pressure applied by six different bandages was measured in supine, sitting, and standing position. The correlation between the variation in soft tissue stiffness and interface pressure was investigated
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