High-Frequency Ultrasound

Abstract

Objectives The purpose of this study was to describe selected sacral tissue characteristics in a convenience sample of healthy volunteer subjects. Design Descriptive Sample and setting 50 healthy volunteers in a clinical learning center in a school of nursing Methods Sacral scans were obtained using a 20-MHz ultrasound scanning system in three positions: prone, 60 and 90 degree side-lying from the back. The images were analyzed by software in the ultrasound program using quantitative parameters of dermal thickness and density (dermal median intensity and derived number of low-echogenic pixels to total pixel [LEP:TP] ratio). Results In general, average values were: dermal thickness between 2.32 and 2.65 mm; median pixel intensity between 102–112; the LEP:TP ratio between 0.39–0.56. There were significant differences in sacral tissue characteristics between measures of thickness and dermal density (median intensity and LEP:TP ratio) by subject side-lying position (60 and 90) versus prone with all p-values less than 0.0001. Conclusions Overall, the ranges were consistent across measures of thickness and dermal density except for systematic differences between side-lying and prone. When comparing thickness, median intensity, or LEP:TP it is important to report subject position. To best recognize tissue inflammation indicative of pressure injuries before surface changes are seen, it is useful to understand healthy High Frequency Ultrasound (HFUS) sacral tissue characteristics. It is anticipated that quantitative assessment of dermal thickness, density, and LEP:TP ratio could help identify individuals with incipient pressure injury.

Efficacy of tissue fibroplasia mesotherapy in reducing signs of skin ageing

“…A decrease in echogenicity correlates with increased tissue hydration (Fig. 1, Table 1) [5][6][7]; • multispectral skin analysis. The device for multispectral analysis of skin parameters uses 8 modules that allow objective assessment of skin condition on multiple levels.…”