SUTURES AND LIGATURES 3
WHAT IS CATGUT Chromic?
The origin of this suture material is the same as catgut (plain)
The material obtained from animal intestine is treated by immersion in a dichromate bath.
It is sterilized and packaged in a similar manner as plain catgut. Its treatment in a chromic bath delays its disintegration and this
suture loses 70% of its strength later by the end of second week.
USES
It is used as a ligature for blood vassals, and also for
suturing the mucosa, of the G.I. Tract, Urinary Tract, Respiratory
Tract, Peritoneum, and Muscle.
Surgical catgut is wet packaged in alcohol in sealed pack and pre-sterilised
WHAT IS POLYGLYCOLIC ACID?
Dexon (Davis and Geck) - This is a synthetic polymer of glycolic acid. The strands are made by extrusion as fine threads which are then braided to form a uniform gauge thread of seven sizes from 0.7 to 4. Polyglycolic acid sutures are extremely inert and cause minimal tissue reaction.
Compared with catgut, dexon suture is stronger, do not fray and are
not slippery, when knotting.
The sutures are sealed in two coverings and sterilized by a two-stage ethylene oxide process. With this method, the inner envelope is sterilized before sealing.
Gas sterilizes the outer envelope to complete the sterilization.
The increased strength compared with catgut, Dexon and other sythetic absorbable sutures, generally a size smaller than for catgut can be used with safety.
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