Universal Anesthesia Machine: Clinical Application in an Austere, Resource-Limited Environment

Area of Science:

• Anesthesiology
• Global Health
• Medical Devices

Background:

• Austere environments pose challenges for anesthesia delivery due to unreliable power, limited gas supplies, and maintenance issues.
• These conditions are prevalent in battlefield medicine, low- and middle-income countries (LMICs), and disaster areas.
• The Universal Anesthesia Machine (UAM) is designed as a draw-over device for safe anesthesia with limited resources.

Purpose of the Study:

• To demonstrate the clinical utility and feasibility of the UAM in a resource-limited setting.
• To evaluate the UAM's performance in providing general anesthesia during surgical procedures in Haiti.
• To serve as a proof-of-concept for UAM's application in austere and LMIC environments.

Main Methods:

• An observational study involving 20 patients in a Haitian hospital.
• General anesthesia was administered using the UAM, with preoxygenation via its draw-over oxygen supply.
• Standard anesthetic agents and medications were administered as per anesthesiologist's discretion; manual ventilation was used as needed.

Main Results:

• The UAM was successfully used by two anesthesiologists for 20 patients undergoing surgeries like herniorrhaphy and hydrocelectomy.
• No external oxygen supply, reliable power grid, or opioids were available.
• All 20 patients were discharged on the day of surgery with no perioperative or 1-month follow-up complications.

Conclusions:

• The UAM's simple design, built-in oxygen concentrator, and draw-over capability make it suitable for resource-limited and austere environments.
• The UAM has the potential to improve safe general anesthesia delivery in combat zones, disaster areas, and LMICs.
• Further studies are recommended to explore diverse surgical cases, patient complexities, alternative agents, and non-anesthesiologist personnel use.