Waste Anesthetic Gas (WAG) Exposure Monitoring
Waste anesthetic gas is the portion of sevoflurane, isoflurane, desflurane or nitrous oxide that escapes into the room instead of the scavenging system — through mask inductions, circuit disconnects, worn seals, uncuffed pediatric tubes and exhalation in recovery. NIOSH recommends halogenated agents stay at or below 2 ppm as a one-hour ceiling, and 0.5 ppm when used together with nitrous oxide.
We monitor the people actually in the room: anesthesia providers, circulators, surgeons, PACU nurses and veterinary technicians. Results come from an AIHA-accredited laboratory with a plain-language verdict and a corrective path when a room fails.
Exposure limits we report against
| Limit | Value | Source |
|---|---|---|
| NIOSH REL — halogenated agents alone | 2 ppm, 1-hour ceiling | NIOSH Criteria Document |
| NIOSH REL — halogenated agent with N₂O | 0.5 ppm | NIOSH Criteria Document |
| NIOSH REL — nitrous oxide | 25 ppm TWA during administration | NIOSH |
| OSHA | No specific PEL — General Duty Clause applies | 29 U.S.C. 654(a)(1) |
Who needs it
- Hospital operating rooms and procedure suites
- Ambulatory surgery centers and office-based surgery suites
- Veterinary surgery, dental and induction areas
- Labor and delivery and endoscopy units
- ECT and behavioral health procedure suites
What's included
- Halogenated agent badges (sevoflurane, isoflurane, desflurane, halothane)
- Nitrous oxide badges where N₂O is in use
- Personal breathing-zone and area sampling
- Scavenging system and machine leak evaluation on request
- AIHA-LAP accredited laboratory analysis, results in ~72 hours
- Written report with NIOSH comparison and remediation guidance
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Controls we recommend when levels are high
Leak-test anesthesia machines and breathing circuits on a documented schedule
Verify active scavenging flow and check interface reservoirs
Replace F/air passive canisters by weight, not by feel
Use cuffed tubes and well-fitted masks; minimize chamber inductions where possible
Confirm room air changes per hour meet design in surgery and dental areas
Flush circuits into the scavenging system rather than the room at case end
Craftsmanship Warranty Included
Every service is backed by our craftsmanship warranty — we stand behind our work.
Waste Anesthetic Gas Monitoring — Frequently Asked Questions
88% faster than our 24-hour service commitment.
Request Waste Anesthetic Gas Monitoring
Tell us how many people need sampling and what prompted the request. We respond within one business day.
Facilities that request this monitoring
Ambulatory Surgery Centers
AAAHC / AAAASF / Joint Commission accreditation support, WAG monitoring and fast turnaround between case days.
Veterinary Facilities
Anesthesia machine testing, WAG monitoring, oxygen and vacuum service for animal hospitals and specialty referral centers.
Behavioral Health & ECT Suites
Oxygen, suction and anesthesia support for ECT and procedure suites inside behavioral health facilities.
Other monitoring programs
Nitrous Oxide Monitoring
Personal N₂O dosimetry for dental, oral surgery, L&D and veterinary teams against the NIOSH 25 ppm limit.
Formaldehyde & Formalin Monitoring
OSHA 1910.1048 initial and periodic TWA/STEL monitoring for histology, pathology, Mohs and grossing areas.
Oxygen Deficiency Monitoring
O₂ displacement assessment for cylinder rooms, cryogenic and liquid nitrogen areas, and confined spaces.
Glutaraldehyde & OPA Monitoring
Ceiling-limit sampling for high-level disinfectants in endoscopy, sterile processing and clinic reprocessing rooms.
Ready to Get Started?
Contact Medical Testing Solutions today for a free consultation. We serve healthcare facilities in all 50 states with certified technicians and fast turnaround.
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