What is considered the diagnostic intracompartmental pressure for compartment syndrome?

The diagnostic intracompartmental pressure for compartment syndrome is typically considered to be 30 mmHg. At this pressure, the risk of developing muscle and nerve ischemia increases significantly, especially when the pressure exceeds the patient's diastolic blood pressure.

Compartment syndrome occurs when there is increased pressure within a closed fascial space, leading to compromised circulation and function of the tissues within that compartment. The key threshold of 30 mmHg helps clinicians determine when intervention, such as fasciotomy, may be necessary to relieve the pressure and prevent irreversible damage.

In clinical practice, if a patient presents with signs of compartment syndrome—such as severe pain, swelling, and reduced sensation—the measurement of intracompartmental pressure becomes critical. If the pressure is found to be at or above 30 mmHg, this strongly indicates the need for surgical evaluation and potential intervention. This pressure threshold highlights the importance of timely diagnosis and treatment to avoid serious complications like muscle necrosis or permanent functional impairment.