Extend the inventory beyond the operating theatre
INSST Technical Prevention Note 933 addresses exposure in non-surgical settings. Identify the gases used, equipment, techniques, locations and people present.
Dental practices, veterinary centres and recovery rooms may need specific assessment. The inventory must include support tasks rather than focusing only on the professional administering anaesthesia.
Locate leaks and residual emissions
NIOSH describes emissions from circuits, connections, masks and patients in recovery. Actual application conditions can change exposure even when the same equipment is used.
Observe work without interfering with care and review maintenance incidents. Equipment performing its clinical function may need additional checks on controlling emissions into the atmosphere.
Collect and remove gases specifically
Waste-gas collection and removal systems must suit the equipment and procedure. Room ventilation complements them, but does not automatically replace capture of a nearby source.
Installation, operation and maintenance must be checked. An existing connection does not demonstrate that the system is operational or effectively removes gases throughout the activity.
Integrate clinical practice and prevention
Technical Prevention Note 933 recommends combining technical measures with safe practices and training. Changes should be agreed between clinical managers, maintenance and prevention teams, following manufacturer instructions.
This assessment does not prescribe doses, anaesthetic flow rates or patient-care decisions. Its purpose is to organise checks, responsibilities and controls so care can be provided with lower occupational exposure.
Measure and review according to the agent
In Spain, Royal Decree 374/2001 establishes the chemical assessment framework. Identify the agents and use current methods and references, consulting the INSST Occupational Exposure Limits database where appropriate.
A single value must not be applied to every anaesthetic. Measurements are related to procedures, duration and control conditions; lack of odour does not establish acceptable exposure.
Protect without relying on unsuitable masks
NIOSH warns of potential reproductive effects associated with high exposures and notes that surgical masks do not protect against these gases. Assessment must consider particular sensitivity and pregnancy with healthcare advice.
Health surveillance complements technical prevention. Clinical results are confidential and do not replace the obligation to investigate leaks or improve inadequate extraction.
Hypothetical example: a new sedation room
A facility introduces sedation into a consultation room where it was not previously used. Before starting the activity, it reviews collection, ventilation, maintenance and the staff who will remain in the room.
After controls are implemented, it verifies exposure during representative procedures and includes recovery. The change in healthcare activity is accompanied by a specific preventive assessment.
