If you are managing a patient with suspected gas embolism, call the HBOT Single Point of Access now
This page provides immediate clinical guidance and connects you to a Hyperbaric Physician 24 hours a day.
Suspected gas embolism?
Call the HBOT Single Point of Access now
24 hours · 7 days a week
Do this now
These actions can begin immediately — before the referral call if necessary, and in parallel while it is being made.
- Stop further gas entry. Check all vascular access devices and connections. Inspect sites of recently removed central lines or haemodialysis catheters.
- Give 100% oxygen. Do not titrate to saturations. High-flow non-rebreathe mask or via ventilator circuit if intubated.
- Keep the patient flat. Do not elevate the head of the bed. Avoid prolonged Trendelenburg.
- Call anaesthesia or ICU if not already involved.
- Treat any periprocedural neurological event as gas embolism until proven otherwise.
- Do not delay the referral call to wait for imaging. CT sensitivity for gas embolism is approximately 67%. A normal scan does not exclude the diagnosis.
Time matters
The probability of a good neurological outcome falls with every hour of delay. The best available evidence shows it to be approximately 65% when hyperbaric treatment begins promptly, falling to around 30% by 15 hours. Early recognition and early referral give patients the best chance of recovery.
NHSE position: HBOT should commence as soon as possible after initial assessment, where the patient is deemed suitable. (NHSE HBOT Service Specification, 2025)
Other emergencies
This service is for healthcare professionals referring patients with suspected iatrogenic gas embolism.
- For diving emergencies, contact the BHA Diving Accident Helpline: 07831 151523 (24 hours).
- For other medical emergencies, contact 999.