Clinical Indications for Hyperbaric Oxygen Therapy

Early hyperbaric consultation may be appropriate in severe traumatic injuries where tissue viability remains threatened despite appropriate initial trauma management.

Examples include:

• Severe crush injuries of an extremity
• High-grade open fractures with extensive soft-tissue injury
• Acute traumatic peripheral ischemia
• Combined vascular and orthopedic injury
• Threatened tissue following revascularization
• Severe edema following prolonged compression
• Selected injuries at high risk for compartment syndrome
• Persistent tissue hypoxia following surgical intervention
• Replantation or reattachment procedures with threatened viability
• Trauma in which progressive tissue necrosis could substantially increase functional loss or amputation risk

The European Consensus Conference on Hyperbaric Medicine specifically recommends HBOT for severe open fractures with crush injury and identifies Gustilo grade IIIB and IIIC injuries as particularly appropriate for consideration.

Less severe injuries may also warrant evaluation when injury-related or patient-related risk factors substantially increase the likelihood of tissue loss, infection, or impaired healing.

Compartment Syndrome and HBOT

The relationship between HBOT and compartment syndrome requires careful distinction.

When acute compartment syndrome requiring decompression is established, fasciotomy should proceed without delay.

HBOT does not replace fasciotomy.

Hyperbaric treatment may be considered as an adjunct:

• Following surgical decompression when significant tissue ischemia remains
• In association with severe crush injury
• After vascular repair when reperfusion injury threatens tissue viability
• In selected closely monitored patients with traumatic edema and threatened tissue before diagnostic criteria for surgical compartment syndrome are established

Any use of HBOT in a patient at risk for compartment syndrome requires continued clinical surveillance. Hyperbaric treatment must not obscure, postpone, or substitute for recognition of a compartment requiring surgical decompression.

Timing of HBOT

When HBOT is selected, treatment is generally most relevant during the early phase of traumatic ischemic injury.

This corresponds to the period during which edema, tissue hypoxia, microvascular dysfunction, and reperfusion injury are actively evolving and potentially salvageable tissue remains at risk.

The optimal treatment course depends on:

• Injury severity
• Time since trauma
• Surgical findings
• Vascular status
• Degree of tissue ischemia
• Response to revascularization or decompression
• Clinical response to HBOT
• Other associated injuries

Treatment frequency and duration are determined by the hyperbaric physician in coordination with the trauma and surgical teams.

HBOT should fit around essential surgical procedures rather than determine their timing.

HBOT as Part of Multidisciplinary Trauma Care

Severe crush injury and acute traumatic ischemia frequently require coordinated care across multiple specialties.

Management may involve:

• Trauma surgery
• Orthopedic surgery
• Vascular surgery
• Plastic and reconstructive surgery
• Emergency medicine
• Critical care
• Hyperbaric medicine
• Wound care
• Infectious disease
• Nephrology
• Physical medicine and rehabilitation

Standard treatment may include:

• Hemorrhage control and resuscitation
• Fracture stabilization
• Vascular repair or revascularization
• Fasciotomy when indicated
• Debridement of nonviable tissue
• Antimicrobial therapy when appropriate
• Management of rhabdomyolysis and electrolyte abnormalities
• Renal support when necessary
• Reconstructive procedures
• Rehabilitation

HBOT should be integrated into this treatment pathway as an adjunct when the anticipated benefit to threatened tissue outweighs the risks and logistical requirements of hyperbaric treatment.

Clinical Evidence and Guidelines

Crush injury, compartment syndrome, and other acute traumatic ischemias are recognized by the Undersea & Hyperbaric Medical Society as accepted indications for Hyperbaric Oxygen Therapy.

The clinical evidence base is smaller than that for many more common medical interventions because severe crush injuries are heterogeneous, time-sensitive, and difficult to study in randomized trials.

One frequently cited randomized, double-blind, placebo-controlled trial evaluated 36 patients with severe limb crush injuries who received either HBOT or sham treatment in addition to standard surgical and medical management.

Complete healing occurred more frequently in the HBOT group, and patients receiving HBOT required fewer additional surgical procedures. The investigators concluded that HBOT was a useful adjunct in selected severe crush injuries.

A 2024 systematic review examining adjunctive HBOT for severe lower-extremity soft-tissue trauma identified seven studies involving 229 patients. The authors reported that available studies generally suggested improved wound healing and reductions in tissue necrosis, infection, or additional surgical intervention when HBOT was added to standard trauma care.

However, the evidence remains limited by small patient populations, heterogeneous injuries, differing treatment protocols, and relatively few randomized clinical trials.

An earlier Cochrane review similarly concluded that the available crush-injury trial suggested improved healing and less tissue necrosis but emphasized that the overall body of evidence for acute traumatic wounds was limited and at risk of bias.

Accordingly, HBOT should not be viewed as a replacement for established trauma management. Its role is best considered as an adjunct for carefully selected patients with significant tissue ischemia and a meaningful risk of loss of function, tissue, or limb.

European hyperbaric consensus recommendations support early HBOT for severe open fractures with crush injury and suggest consideration in selected crush injuries where tissue viability is threatened.

Medicare Coverage

The Centers for Medicare & Medicaid Services National Coverage Determination for Hyperbaric Oxygen Therapy (NCD 20.29) specifically includes:

Acute traumatic peripheral ischemia, when HBOT is used as an adjunct to accepted standard treatment and loss of function, limb, or life is threatened.

CMS also specifically covers:

Crush injuries and suturing of severed limbs, again as adjunctive treatment when loss of function, limb, or life is threatened.

Coverage recognition does not mean that every traumatic injury qualifies for HBOT or guarantees payment for an individual treatment.

Documentation should clearly establish the severity of injury, the threatened tissue or function, standard treatments being provided, medical necessity for adjunctive HBOT, and applicable payer requirements.

When to Refer

Consider early consultation with a hyperbaric medicine specialist when a patient has a severe crush injury or other acute traumatic ischemic injury and there is concern for threatened tissue, loss of function, or limb loss despite appropriate trauma management.

Situations that should prompt consideration include:

• Severe extremity crush injury
• Gustilo IIIB or IIIC open fracture
• Extensive soft-tissue trauma with marginal tissue viability
• Acute traumatic peripheral ischemia
• Combined orthopedic and vascular injury
• Persistent ischemia after revascularization
• Significant ischemia-reperfusion injury
• Threatened tissue after replantation
• Severe post-traumatic edema with concern for progressive tissue loss
• Ongoing tissue hypoxia following fasciotomy or other definitive intervention

HBOT should never delay fasciotomy, revascularization, hemorrhage control, debridement, fracture stabilization, or other immediately necessary surgical treatment.

When possible, early communication between the treating trauma team and an experienced hyperbaric center allows HBOT logistics to be coordinated alongside definitive care rather than after tissue deterioration has already occurred.