Overview
Acute compartment syndrome is a time-critical loss of tissue perfusion within a closed fascial space. Children can be difficult to examine, and the early findings may be subtle. Prompt recognition and complete surgical decompression are essential; waiting for paralysis, loss of sensation or an absent pulse can allow irreversible injury (Tachdjian, Chapter 27).
Recognize the At-Risk Child
Common associations include tibial and supracondylar humeral fractures, but compartment syndrome can also follow soft-tissue injury without fracture, surgery or positioning, infection and intravenous infiltration.
Review the trend in pain and analgesic use rather than a single examination. Increasing analgesic requirements and anxiety can be more useful than the traditional late signs.
Examine swelling, compartment tension, pain with passive stretch and motor/sensory function as cooperation permits.
A pink extremity or a palpable pulse does not exclude muscle ischemia.
In an obtunded or uncooperative child, maintain a lower threshold for objective assessment and repeated senior review. Some reported cases have few obvious symptoms.
(Tachdjian, Chapters 27 and 29.)
Immediate Assessment
Reassess the entire limb, mechanism, fracture alignment and any restrictive cast or dressing.
Remove circumferential constriction down to the skin when compartment syndrome is suspected.
Keep a limb with suspected evolving compartment syndrome at heart level. The higher elevation used for routine swelling control can reduce the arterial perfusion gradient in this setting.
Record findings, timing, analgesic requirements and treatment actions. Continue serial examinations while definitive management is arranged.
Do not allow testing to postpone decompression when the clinical diagnosis is established.
(Tachdjian, Chapter 27.)
Compartment Pressure Measurement
Pressure measurement can support the diagnosis when examination is unreliable or the findings are equivocal. The source discusses needle, side-port and slit-catheter methods and emphasizes that results depend on the method and clinical setting (Tachdjian, Chapter 27).
Interpretation factor | Clinical significance |
|---|---|
Absolute pressure | A numerical threshold alone does not define every pediatric compartment syndrome. |
Relationship to diastolic pressure | Perfusion depends on the pressure gradient as well as the intracompartmental reading. |
Serial trend | A rising pressure or worsening examination may be more important than one apparently reassuring value. |
Patient and technique | Blood pressure, local perfusion, ability to report symptoms and measurement accuracy all affect interpretation. |
Tachdjian presents several historical thresholds, including pressures approaching within 10–30 mm Hg of diastolic pressure, but explicitly describes them as guidelines. Clinical assessment and the evolving course determine the need for fasciotomy; a single universal cutoff should not replace judgment.
Operative Planning
Identify every involved compartment and plan incisions long enough to achieve a complete release.
Coordinate fracture stabilization and any vascular reconstruction with the soft-tissue procedure.
Anticipate substantial swelling after decompression and the need for an open wound and staged reassessment.
Prepare for muscle viability assessment, debridement, protective dressings and subsequent closure or skin coverage.
(Tachdjian, Chapter 27.)
Surgical Decompression
Leg: Two-Incision, Four-Compartment Release
Use a lateral incision to expose and fully release the anterior and lateral compartments.
Extend the release proximally enough to decompress the muscles near their origin, protecting the superficial peroneal nerve.
Use a medial incision to release both the superficial and deep posterior compartments.
Carry the medial release sufficiently distally to decompress the entire deep posterior compartment; opening only the superficial fascia is inadequate.
Assess each muscle and verify that no remaining fascial or epimysial band is constricting it.
(Tachdjian, Chapter 27, Fig. 27.26.)
Forearm Decompression
Use the volar exposure described by the source to reach the involved compartments, extending the incision as needed for complete release.
Identify the superficial and deep muscle compartments separately. The deep flexor compartment is particularly vulnerable and must not be overlooked.
Assess flexor digitorum profundus, flexor pollicis longus and pronator quadratus as part of the deep release.
Release constricting epimysium and perform external neurolysis when indicated by the operative findings.
Preserve protective soft-tissue coverage over vulnerable nerves where possible and reassess the completeness of decompression.
(Tachdjian, Chapter 27, Fig. 27.27.)
Muscle Assessment and Fracture Stabilization
Inspect each muscle after release. Remove clearly nonviable tissue while preserving tissue of uncertain viability for subsequent reassessment, as described in the source. Stabilize untreated fractures in a way that permits continued wound access. An initially modest appearance does not justify a small release: marked swelling may develop after perfusion improves (Tachdjian, Chapter 27).
Postoperative and Staged Wound Care
Apply a sterile bulky dressing and continue close observation of perfusion, neurologic status and the decompressed limb.
Plan return to the operating room at approximately 48–72-hour intervals for reassessment and further debridement as required.
Once the wound is clean and tissue viability is established, obtain closure or split-thickness skin coverage as appropriate.
After healing, evaluate residual muscle, nerve or contracture deficits and plan rehabilitation or reconstruction as needed.
(Tachdjian, Chapter 27.)
Pearls and Pitfalls
Do not wait for an absent pulse or paralysis.
Do not interpret a single pressure reading without the blood pressure and clinical trend.
Removing a constrictive cast may improve pressure but does not prove that a developed compartment syndrome has resolved.
Release all relevant compartments completely, including the deep posterior leg and deep volar forearm.
Do not force primary closure over swelling after decompression.
Continue surveillance after fracture reduction or revascularization; the risk evolves over time.
(Tachdjian, Chapters 27 and 29.)
References
Herring JA, ed. Tachdjian's Pediatric Orthopaedics: From the Texas Scottish Rite Hospital for Children. 6th ed. Elsevier; 2022. Chapter 27, General Principles of Managing Orthopaedic Injuries, compartment syndrome and fasciotomy, pp. 1149–1152, Figs. 27.25–27.27.
Herring JA, ed. Tachdjian's Pediatric Orthopaedics. 6th ed. Elsevier; 2022. Chapter 29, Upper Extremity Injuries, pediatric warning signs and neurovascular monitoring in supracondylar fractures.