Kelly’s suture is done in :
**Core Concept**
Kelly's suture is a type of continuous suture used in general surgery to close a long incision, typically in the gastrointestinal tract. It involves a simple interrupted suture pattern with a throw on either side of the incision.
**Why the Correct Answer is Right**
Kelly's suture is performed in the **submucosal** layer of the incision. The suture is carried out in a continuous manner, with each throw leaving a small amount of tissue between the two arms of the suture. This layer is chosen to minimize the risk of leakage and promote healing. The submucosal layer is rich in blood supply, which aids in the healing process.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because Kelly's suture is not performed in the mucosal layer, which is too superficial and would not provide adequate strength to the suture line.
**Option B:** This option is incorrect because the muscle layer is too deep for Kelly's suture, which would make it difficult to place the sutures and increase the risk of complications.
**Option C:** This option is incorrect because the serosal layer is not suitable for Kelly's suture, as it does not provide enough tissue for the suture to hold.
**Clinical Pearl / High-Yield Fact**
It is essential to remember that Kelly's suture is typically used in the gastrointestinal tract, and the choice of suture layer depends on the specific location and type of incision.
**Correct Answer: D. Submucosal**