Tech in Surgery Prep / Unit 3 TSC 069 review, 2 to 3 minutes
Following an Incision Inward
The idea
A worked example, constructed for this course, follows a lower midline abdominal incision from the skin to the peritoneum, naming each layer as it is reached.
In practice
The surgeon marks a vertical line below the navel and asks for the knife. The first layer is the epidermis, which has no blood vessels, so the first cut barely bleeds until it reaches the dermis, where small vessels ooze. The scrub person has a sponge and a fine clamp ready, because small bleeders appear now. Below the dermis is the hypodermis, the fatty subcutaneous layer, which in this patient is thick; the surgeon asks for retraction to hold its edges apart. At the bottom of the fat is a firm white layer of connective tissue along the midline, the linea alba, where the abdominal muscles attach. On either side, beneath their sheaths, lie the two rectus abdominis muscles. The surgeon opens along the midline between them. The last layer is the parietal peritoneum, the thin serous lining of the abdominal cavity. The surgeon lifts it carefully before opening it, because the bowel lies directly beneath. Through the opening, the scrub person can see that the visceral layer of the same membrane covers the bowel itself.
Where people slip
Every layer named on the way in will be named again on the way out, in reverse order, when the wound is closed. A scrub person who has followed the layers on entry already knows the sequence of closure, and can have the right suture ready for each layer before it is asked for. Anatomy, for the scrub role, is mostly a map for anticipation: it tells you what comes next before anyone has to say it, and it lets you notice when the case has gone somewhere the plan did not expect.
Your place on the trail
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Builds on
Unlocks
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