HBOT Protocols: Pressure and Schedule
Every HBOT treatment is defined by two core variables: the pressure at which oxygen is delivered (expressed in atmospheres absolute, ATA) and the schedule (session length, frequency, and course duration). These variables together determine the therapeutic effect and distinguish research-grade neurological HBOT from UHMS-approved clinical HBOT from mild soft-shell home chamber use.
Pressure-Based Protocols
HBOT pressures span from 1.3 ATA (mild soft-shell HBOT, FDA-cleared only for altitude sickness) through 2.0 ATA (research-standard neurological HBOT, the Efrati Lab pressure) to 2.4 ATA (the UHMS clinical standard for most approved indications, pegged to CMS reimbursement) and 2.8–3.0 ATA (emergency indications: carbon monoxide poisoning, decompression sickness, gas gangrene). Each pressure represents a different balance of therapeutic effect, physiological tolerance, and clinical application.
Pressure is not interchangeable. The clinical evidence for neurological HBOT is strongest at 2.0 ATA; mixed or weaker at 1.5 ATA; and limited at 1.3 ATA. The clinical evidence for wound care is strongest at 2.4 ATA. Emergency indications require 2.8+ ATA for maximum tissue oxygenation and toxic gas displacement. Protocol selection should match pressure to indication.
Schedule-Based Protocols
HBOT courses range from 1–3 sessions (emergency indications: CO poisoning, decompression sickness) to 20–40 sessions (wound care) to 40–60 sessions (neurological recovery). Standard clinical sessions run 90 minutes with scheduled 5-minute air breaks every 20–30 minutes during the oxygen-breathing phase. Emergency protocols can run 4–8 hours per session (US Navy Treatment Table 6 and 6A for severe DCS).
The 40-session, 2.0 ATA, five-days-per-week framework has emerged as the research standard for most neurological HBOT applications. The 20–40 session, 2.4 ATA framework is the UHMS clinical standard for wound care. Emergency protocols are indication-specific and time-critical.
Clinical vs Research vs Home Protocols
Clinical UHMS-approved protocols are delivered at UHMS-accredited hospital hyperbaric facilities with CMS/Medicare coverage. Standard: 2.4 ATA, 20–40 sessions, with specific documentation requirements. Patients should expect pre-treatment screening (ear equalisation, chest imaging, cardiovascular review), interim progress assessments, and coordination with the specialty wound-care or infection team.
Research/off-label protocols at private hyperbaric clinics typically mirror the Efrati Lab 2.0 ATA / 40-session framework for neurological indications. Cash-pay cost: $6,000–$18,000 for a full course. No insurance coverage in most jurisdictions.
Home soft-shell protocols at 1.3 ATA operate outside the clinical framework. Users commit to self-administered sessions over weeks to months. Evidence is weaker than clinical pressures; expectations should be set accordingly.
Protocol Selection Framework
For emergency indications (CO poisoning, decompression sickness, gas gangrene), seek immediate tertiary hyperbaric facility access via DAN (+1-919-684-9111) or emergency departments. For UHMS-approved wound-care indications, seek referral to a UHMS-accredited facility with CMS billing. For off-label neurological HBOT, consult with a hyperbaric physician familiar with research-stage applications and consider the research-standard 2.0 ATA / 40-session framework. For wellness and general use, understand the limitations of 1.3 ATA mild HBOT before committing.