Surgical Smoke Hazards: Is Electrosurgical Smoke Harmful?

What is in electrosurgical smoke

When tissue is heated by diathermy or laser, cells are vaporised and partly burned. The resulting plume contains water vapour, ultrafine particles and gases from thermal decomposition. Commonly reported chemicals include formaldehyde, benzene, toluene, hydrogen cyanide and various hydrocarbons, together with a characteristic odour that many theatre staff recognise.

Particle size matters because very small particles reach deep into the respiratory tract. Plume particles are often well below one micron, which is why standard surgical masks do not provide the same protection as capture of the smoke at its source.

Is surgical smoke harmful? Health and biological concerns

Reported effects include eye, nose and throat irritation, headache, coughing and nausea. Because the smoke contains compounds with known hazards, occupational health bodies in many countries recommend reducing exposure. Studies have also detected viral DNA and cell fragments in plumes, although the clinical significance of this for transmission remains debated; for that reason the precautionary principle is widely applied.

Patients are exposed too, particularly in laparoscopic work where the pneumoperitoneum fills with smoke and visibility drops. Poor visibility is itself a safety issue, as it can prolong the case and lead to errors.

Controls: from source capture to room ventilation

The hierarchy of control starts with source capture. A dedicated smoke evacuator with a suction nozzle held close to the site, ideally within a few centimetres, removes most of the plume before it spreads. General room ventilation and wall suction do not replace it, since they are not designed to filter particles at that scale.

Choose equipment with a multi-stage filter that includes a high-efficiency particle stage (ULPA or HEPA) and activated carbon for gases. Replace filters strictly at the intervals set by the manufacturer, and treat used filters as potentially contaminated waste according to your hospital policy. For practical selection advice see our smoke evacuator guide and the article on ULPA filters for smoke evacuation.

Equipment examples: BOWA SHE SHA and ATMOS MEDAP FUMOVAC 700

The BOWA SHE SHA uses a four-stage filter (pre-filter, ULPA-15, activated carbon, post-filter) that captures particles down to 0.1 micrometre with 99.999 % efficiency according to BOWA. Filter life is up to 35 hours of activation, with automatic detection and remaining-life display. A universal sensor switches the unit on when smoke is produced, and the maximum flow is 708 l/min with a 22 mm hose and a noise level up to 55 dBA.

The ATMOS MEDAP FUMOVAC 700 delivers a quiet 700 l/min in continuous operation for HF, RF, ultrasound and laser surgery as well as laparoscopy. It has a four-stage filter lasting up to 35 hours, three inlets (22 / 9.5 / 6.4 mm), and an automatic remote switch activator that starts and stops it together with the HF pencil. It fits into HF towers or ceiling supply unit platforms.

Making smoke evacuation routine in your theatres

Equipment only works if it is used. Place the evacuator within easy reach, standardise the accessories, and include smoke control in the case briefing. Document filter changes alongside other biomedical records and track hours of use.

Beckfinity supplies smoke evacuation solutions in the UAE and can advise on the right configuration for your OR; contact our team to discuss your needs. Confirm local requirements and device registration with the relevant authorities.

Include filter handling in staff training, and check that everyone knows how to dispose of used filters and which protective equipment to wear when changing them.