# Noninvasive Compartmental Pressure Assessment With iCare in Healthy Individuals of Different Ages

## TL;DR

This study uses the iCare device to measure muscle compartment pressure in healthy individuals of different ages, finding that pressure varies little across most locations and age groups.

## Contribution

The study provides new empirical data on compartmental pressure variations across age groups and measurement locations using a noninvasive method.

## Key findings

- Compartmental pressure was higher in older individuals at the upper anterior measurement location.
- Pressure was generally comparable across age groups at most measurement locations.
- The fascia may help redistribute pressure after injury due to its structure.

## Abstract

Acute compartment syndrome is a major orthopedic emergency due to elevated pressure in the closed muscle compartment, and prompt evaluation and fasciotomy are always needed. However, the gold standard indicator of fasciotomy is still under debate. To date, few studies have investigated the variations in compartmental pressure at different locations in people of different ages. The aim of the research was to compare compartmental pressure among different age groups and measurement locations.

A total of 154 healthy individuals including 106 males and 48 females over 18 years (46.8 ± 14.0 years) were enrolled between January 2020 and December 2021, and classified into five age groups: Group I = 18–30 years; Group II = 31–40 years; Group III = 41–50 years; Group IV = 51–60 years; and Group V ≥ 61 years. Six measurement locations (lower, middle, and upper points, 6 points) were selected to assess pressure variations in the anterior compartment and posterior superficial compartment with the iCare device, which calculates biomechanical properties based on the tissue's inherent response. Differences in pressure among the five age groups and six measurement locations (three for anterior compartment, three for posterior superficial compartment) were examined. One‐way ANOVA and LST tests were used to conduct comparisons among five independent age groups.

In the same measurement location, the compartmental pressure in Group V at the upper anterior (anterior fascial compartment) measurement location was increased compared with that in Groups I, III, and IV. However, the compartmental pressures at the middle anterior and posterior measurement locations were almost comparable among the five different age groups. In the same age group, the compartmental pressure was more inclined to be lower at the upper anterior measurement location in Groups I–IV. However, no significant differences were observed for other measurement locations.

The measurement results demonstrated comparable compartmental pressure in the fascial compartment at most measurement locations. The fascia, which forms the limb compartment, may play a role in pressure release or redistribution after injury or fracture due to its function and unique or interconnected structure.

The aim of the research was to compare compartmental pressure among different age groups and measurement locations. Healthy individuals who were older than 18 years were enrolled and classified into five age groups. Six measurement locations (lower, middle and upper points, 6 points) were selected to assess pressure variations in the anterior compartment and posterior superficial compartment with the iCare device, which calculates biomechanical properties based on the tissue's inherent response. The measurement results demonstrated comparable compartmental pressure in the fascial compartment at most measurement locations. The fascia, which forms the limb compartment, may play a role in pressure release or redistribution after injury or fracture due to its function and unique or interconnected structure.