Exploring How Subcutaneous Fat Prevents Pressure Sores: A Study Using Ultrasound and Finite Element Analysis

Area of Science:

• Biomedical Engineering
• Dermatology
• Orthopedics

Background:

• Pressure sores are a significant concern for bedridden patients, leading to complications.
• Understanding the biomechanical factors contributing to pressure sore development is crucial for prevention.

Purpose of the Study:

• To investigate the protective role of subcutaneous fat in pressure sore prevention.
• To correlate subcutaneous fat thickness with pressure sore risk using the Braden scale.
• To elucidate the biomechanical mechanisms through ultrasound and finite element analysis (FEA).

Main Methods:

• 100 bedridden patients were assessed for sacral subcutaneous fat thickness via ultrasound and Braden scale scores.
• Finite element analysis (FEA) simulated stress and strain distributions for varying fat thicknesses.
• Statistical analyses included ANOVA, Tukey's test, and Pearson's chi-square test.

Main Results:

• A significant negative correlation was found between subcutaneous fat thickness and pressure sore risk.
• Patients with higher risk (lower Braden scores) exhibited thinner subcutaneous fat.
• FEA confirmed that increased fat thickness reduced mechanical stress and deformation in underlying tissues.

Conclusions:

• Subcutaneous fat provides a vital protective buffer against pressure-induced tissue damage.
• Subcutaneous fat thickness can serve as a predictive marker for pressure sore risk.
• Fat grafting may be a potential strategy for pressure sore prevention.