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Karydakis flap procedure for pilonidal sinus - general and visceral surgery
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Planning the resection
The technique is demonstrated on a chronic recurrent pilonidal sinus.
First, define the resection margins. The dotted lines correspond to the highest point of the buttock in question. The ovoid incision should be located eccentric to the midline and cover the entire system of tracts. The central axis of the incision should be about 2cm lateral to the midline.
Mobilizing the skin flap with fat
After loosening/cutting the medical tape adhesive strips on the buttocks, close the wound in layered fashion.
With strong full-thickness three-point sutures and including the right sacral fascia, join the mobilized skin-fat flap with the contralateral wound margin. This will largely prevent cavity formation.
Tip: It is best to first place the stitches without tying them.
Follow this with a subcutaneous suture and close the skin with interrupted sutures.
And as the final step, instill some local anesthetic through the Redon drain.
Note: Suture line and later scar are about 1-2cm off the midline. The natal cleft has flattened out somewhat, particularly in its superior region, making it more difficult for hair to penetrate the skin once more.