Ulmer (2002) — The clinical diagnosis of compartment syndrome of the lower leg: are clinical findings predictive of the disorder?

The Clinical Diagnosis of Compartment Syndrome of the Lower Leg: Are Clinical Findings Predictive of the Disorder?

Ulmer·J Orthop Trauma·2002·365 citations·Trauma

This systematic review by Ulmer (2002) searches the prospective literature to quantify how well the classic clinical signs of lower leg compartment syndrome — pain, paresthesia, pain with passive stretch, and paresis — actually perform as diagnostic tests. It uses Bayesian likelihood ratio analysis to estimate the probability of compartment syndrome based on the number of findings present.

Study Snapshot

Design

Systematic review

Objective

Whether clinical findings reliably diagnose compartment syndrome of the lower leg

Outcome(s)

Sensitivity and specificity of clinical findings for compartment syndrome

Subjects

4 eligible studies from 104 reviewed

Inclusion

Traumatic or iatrogenic tibia injuries
Sensitivity and specificity calculable
Prospective study design

Statistics

Likelihood ratio (Bayes' theorem)

Key Findings

Each individual clinical sign carries low sensitivity (13–19%) and PPV (11–15%) — the classic findings are present in only a minority of confirmed cases, meaning a negative exam does not clear a patient and a positive finding alone is insufficient to act
Absence of findings is more diagnostically useful than their presence: specificity ~97% and NPV ~98% mean that when all four signs are absent, compartment syndrome becomes unlikely — but incomplete absence provides false reassurance
The probability of compartment syndrome rises steeply as simultaneous findings accumulate:
–1 finding → ~25% probability
–2 findings (pain + PPS) → 68% probability
–3 findings (pain, PPS, paresis) → 93% probability
–4 findings → ~98% probability
Retrospective studies reported sensitivity of 68–98% — a figure widely cited and structurally false, because false-negatives were never captured and clinical findings served as their own gold standard
No consensus existed across 27 reviewed articles on which sign is most important — pain with passive stretch was simultaneously labeled the most reliable and the most unreliable sign by different authors, underscoring the absence of a single dependable anchor

Clinical Relevance

When evaluating a tibial fracture for compartment syndrome, remember that a single classic sign (even pain with passive stretch) carries only ~25% probability of true compartment syndrome — don't be falsely reassured by one absent sign, but do escalate urgently when three or more findings appear simultaneously, where probability exceeds 90%.

Pressure measurement remains essential because clinical signs alone cannot reliably confirm or exclude the diagnosis.

Supplemental

The Clinical Diagnosis of Compartment Syndrome of the Lower Leg: Are Clinical Findings Predictive of the Disorder?

The Clinical Diagnosis of Compartment Syndrome of the Lower Leg: Are Clinical Findings Predictive of the Disorder?

Study Snapshot

Key Findings

Clinical Relevance

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The Clinical Diagnosis of Compartment Syndrome of the Lower Leg: Are Clinical Findings Predictive of the Disorder?

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The Clinical Diagnosis of Compartment Syndrome of the Lower Leg: Are Clinical Findings Predictive of the Disorder?

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Key Findings

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