1. The torn anorectal mucosa should be repaired with sutures using either the continuous or interrupted technique.   Traditionally, the technique described to repair the torn anal mucosa was to insert interrupted sutures with the knot tied within the anal canal. However, this was recommended when catgut was in use to minimise tissue reaction and infection. With the availability of polyglactin suture material this is no longer necessary as it dissolves by hydrolysis.
2. Figure of eight sutures should be avoided during repair of the anal mucosa as they can cause ischaemia.

Repair should take place in an operating theatre, under regional or general anaesthesia, with good lighting and with appropriate instruments.

Repair of OASIS in the delivery room may be performed in certain circumstances after discussion with a senior obstetrician.