Source of Catgut Suture Material

Catgut (absorbable suture material) is obtained from submucosa of small intestine of:

Correct Answer: Sheep

Despite its name, catgut is NOT derived from cats. It is obtained from the submucosa of the small intestine of sheep (and sometimes cattle). It is a natural, absorbable suture used in surgery.

Why 'Catgut'?

• The term is believed to be derived from 'kitgut' (strings of a small fiddle called 'kit') or from the German 'Katze' (cat) — but historically it has always been made from sheep intestine.
• Sheep submucosa provides the ideal tensile strength, flexibility, and biocompatibility for use as an absorbable surgical suture.

Properties of Catgut

• Naturally absorbed by the body (proteolytic enzymes) within 10–90 days depending on whether it is plain or chromic (chromium-treated).
• Used for internal sutures that do not need to be removed.

Related: Natural Casings from Submucosa

• The same submucosal tissue from sheep/goat small intestine is also used as natural sausage casings ('rounds').