Mikro-Cath™ - Intra-compartmental Pressures

Reliable Compartment Pressure Measurements

The Mikro-Cath™ pressure catheter delivers high-fidelity, pressure waveform data for analysis of intra-compartmental pressure measurements. Simple, accurate signals from the solid-state pressure sensor catheter provide continuous, real-time assessments to support the diagnosis of acute compartment syndrome (ACS) or evaluation of chronic exertional compartment syndrome (CECS).

Mikro-Cath - Intra-Compartment Pressures

Guide compartment syndrome diagnosis

Mikro-Cath high-fidelity pressure measurements provide orthopedic trauma surgeons with reliable pressure signals to support and simplify the diagnosis of compartment syndrome for trauma patients. As a compartment pressure measurement device, the Mikro-Cath pressure catheter also supports orthopedic research and sports medicine physicians monitor chronic exertional compartment syndrome and can be used in exercise studies due to the solid-state pressure sensor's stability. This stability delivers reliable, accurate measurements even during patient movement.

With an appropriately sized introducer, the Mikro-Cath can be easily inserted into the targeted muscle compartment for continuous measurements up to 24 hours.

The Mikro-Cath is a viable alternative to the previous Stryker compartment pressure monitor and provides the advantage of continuous pressure monitoring, reliable signals, and ease of use. With the catheter tip at only 3.5F (1.17 mm), the puncture wound is smaller than other catheter options. Patient movement also does not interfere with the signal quality compared to fluid-filled devices.

Consider the Mikro-Cath for compartment pressure monitoring and early detection of compartment syndrome to avoid irreversible damage or to prevent misdiagnosis.


Contact a Sales Rep  or call 832-667-7000 to learn more about how the Mikro-Cath Pressure Catheter can advance your research and support compartment pressure measurement.

The Mikro-Cath pressure catheter is approved for use in the United States, Europe, and Japan for cardiovascular measurements and is approved for use in the United States and Europe for intra-compartmental and airway pressure measurements. 

Millar Mikro-Cath CE Mark

Clinicians can obtain more comprehensive and accurate measurements for:

Intra-compartmental pressure measurements support compartment syndrome diagnosis through direct and reliable pressure readings in comparison to fluid-filled pressure measurements or the five “P’s” assessment – pain, paralysis, paresthesia, pallor, and pulselessness.

Compartment syndrome can impact the lower and upper extremities as well as the compartments of the hand, foot, and gluteal region. Acute compartment syndrome typically occurs from trauma but can occur with an underlying medical condition that causes an increase in fluid volume within a compartment.

While there is still debate on when compartment pressures become detrimental to the surrounding and tissue and nerves, a common practice is to monitor for a delta pressure of 30 mmHg or less for greater than two hours. The delta pressure is the difference between the diastolic blood pressure of a patient and the pressure of the compartment measured (ΔP = diastolic - intracompartmental pressure)¹. The pressure is caused by muscle swelling or bleeding that is constricted by the fascia. The swelling disrupts blood flow to the muscle and nerve cells, decreasing oxygen and nutrients. This condition becomes very painful and can lead to tissue and nerve damage within the extremity affected. To avoid permanent damage in acute compartment syndrome, the patient must be treated with a fasciotomy within the first 4 hours².

¹McQueen M.M., Court-Brown C.M. Compartment Monitoring in Tibial Fractures: The Pressure Threshold for Decompression. JBJS [Br] 1996; 78-B-:99-104

²Hasnain Raza and Anant Mahapatra, “Acute Compartment Syndrome in Orthopedics: Causes, Diagnosis, and Management,” Advances in Orthopedics, vol. 2015, Article ID 543412, 8 pages, 2015. doi:10.1155/2015/543412

³David Roscoe, MRCGP, MFSEM(UK), MSc(SEM), DipIMC RCSEd, MPA, Andrew J.Roberts, MSc, David Hulse, MB ChB, MSc, FFSEM(UK), "Intramuscular Compartment Pressure Measurement in Chronic Exertional Compartment Syndrome: New and Improved Diagnostic Criteria," The American Journal of Sports Medicine, Vol 43, Issue 2, pp. 392 - 398.


Can you confidently diagnosis compartment syndrome? Consider the benefits of continuous monitoring when measuring intra-compartmental pressures.

According to a 2004 study*, compartment syndrome diagnosis is one of the most common sources of litigation against orthopedic surgeons. The average cost of a settlement for undiagnosed compartment syndrome has been cited at $426,000.30. There is value in bringing higher confidence back into the equation.

The Mikro-Cath offers improved sensitivity and specificity over existing methods in the diagnosis of anterior compartment CECS by obtaining continuous, high fidelity data.

Benefits of Continuous Compartment Pressure Monitoring

  • Ability to evaluate average pressure trends and assess data in real-time
  • Know exact time when pressures cross and sustain threshold levels
  • Reduces stress to the patient to have one catheter introduced compared to multiple needle insertions every 1 to 2 hours for up to 24 hours as required by traditional single point monitoring systems
  • Fewer pressure measurements/procedures (time) needed from a physician
  • Less risk of false measurements with solid-state sensor technology (air bubbles/proper calibration/angle/patient movement)
  • More cost effective if monitoring for extended periods of time


Olson A, Rhorer A. Orthopaedic trauma for the general orthopaedist. Clin Orthop Rel Res [Internet]. 2005 [cited 2015 Jan]; 433;30-7. Available from http://www.researchgate.net/publication/7930149_Orthopaedic_trauma_for_the_general

Bhattacharyya T, Vrahas M. The medical-legal aspects of compartment syndrome. J Bone Joint Surg Am [Internet]. 2004 Apr [cited 2015 Jan]; 86-A(4);864-7. Available from: http://www.ncbi.nlm.nih.gov/pubmed/15069156


USE<24 hours

Indications for Use Statement:

The Mikro-Cath Pressure Catheter is a single‐use catheter intended to be used for medical research and diagnostic purposes. The catheter is indicated to measure cardiovascular, intra-compartmental, and airway pressures in the human body. The catheter is used as a minimally invasive device under short-term limited body contact (<24 hours).

The typical cardiovascular application will be through the femoral artery with the use of an additional guiding catheter. 

Mikro-Cath Pressure Catheter may be introduced into the targeted muscle compartment through an introducer.  The Mikro-Cath may be introduced into the respiratory system through an existing orifice or through an incision.  

Additional contraindications, precautions and warnings are referenced in the Instructions for Use available under the Knowledge Center acute catheter manuals.

Mikro-Cath Calibration Instructions