# Chronic exertional compartment syndrome of the forearm diagnosed in a wider spectrum of patients and not seldom with a history of the same diagnosis in the lower legs

## TL;DR

This study shows that chronic exertional compartment syndrome in the forearm occurs in a broader range of patients, including those with a history of the condition in their lower legs.

## Contribution

The study expands the known patient profile for forearm CECS and questions the standard diagnostic pressure cutoff for this condition.

## Key findings

- More male patients were diagnosed with forearm CECS compared to those without.
- Over 20% of forearm CECS patients had prior treatment for lower leg CECS.
- Standard intramuscular pressure cutoffs for diagnosing CECS may be too high for forearm compartments.

## Abstract

To identify patient characteristics associated with forearm chronic exertional compartment syndrome (CECS) and to demonstrate the distribution of intramuscular pressure (IMP) values at 1 min postexercise in a cohort of patients with exercise‐induced forearm pain.

A consecutive series of 99 patients seeking orthopaedic consultation for chronic exertional forearm pain underwent IMP measurements between 2010 and 2023. The diagnosis of CECS was confirmed (n = 34) or ruled out (n = 65) based on the patient's history, clinical examination and IMP measurements.

There were significantly more male patients in the CECS group than in the group of patients where the diagnosis was ruled out. Furthermore, a significantly higher proportion of the CECS patients had been previously treated for CECS of the lower legs. The most common occupation was office worker (21%), followed by craftsperson (18%). The most common main physical activities were strength training (21%) and cycling (15%). The median (range) 1‐min postexercise IMP values for patients with CECS were 34 (23–68) mmHg for the flexor compartment and 32 (25–67) mmHg for the extensor compartment.

This study demonstrates a more general population of CECS patients compared to previous studies. Notably, more than a fifth of the CECS patients had previously been treated for CECS in the lower legs. Importantly, considering the 95% confidence interval for IMP values in patients without CECS, the most used IMP cutoff value for diagnosing CECS appears to be too high for the forearm compartments.

Level II.