cauterize
Meaning of cauterize: Deliberately destroying a small patch of tissue to seal a bleeding point or remove an unwanted growth.
Definition of cauterize
To cauterize is to destroy tissue on purpose using heat, extreme cold, electric current or a corrosive chemical. The main purposes are to stop bleeding by sealing the cut ends of small vessels and to remove unwanted tissue such as a wart or a polyp. Cautery leaves a small area of dead tissue that the body clears and replaces with scar.
What methods are used?
Anything that reliably kills tissue in a controlled area will serve, and the choice depends on the site and the purpose.
| Method | How it destroys tissue | Typical use |
|---|---|---|
| Electrosurgery | Current passing through tissue heats it | Sealing vessels during an operation |
| Thermal cautery | A pre-heated tip touches the tissue | Nosebleeds, small skin lesions |
| Cryocautery | Freezing ruptures the cells | Warts, cervical lesions |
| Chemical cautery | A caustic substance burns the surface | Silver nitrate on a bleeding point |
How does it stop bleeding?
Heat makes proteins clump and lose their shape. In the wall of a small blood vessel, that clumping shrinks and seals the opening, and the collagen around it contracts to pinch the channel closed. A clot then forms on the sealed end. The effect is confined to vessels small enough to be closed this way; larger arteries are tied or clipped instead, because pressure inside them would reopen a heat seal. This is why cautery is used constantly during surgery for the countless tiny vessels that would otherwise obscure the field, but never for a major vessel.
What are the drawbacks?
Destruction is not perfectly precise. Heat conducts outward, so a rim of tissue beyond the intended target is also damaged, and in a confined space such as inside the nose or near a nerve that margin matters. The dead layer slows healing slightly compared with a clean cut, and it is why a cauterized area forms a scab and can be more prone to infection. Electrosurgery also produces smoke and requires a return path for the current, so pacemakers and metal implants change how it is set up.
Also known as
Used in a sentence
Small bleeding points along the incision were cauterized before closure.
Good to know
Cautery seals only small vessels; arteries under higher pressure are tied or clipped, since a heat seal on them can reopen.
Word origin
Where “cauterize” comes from
From the Greek kauterion, a branding iron, from kaiein, to burn.