Question

Which of the following layers are transected when a subcostal flank incision is used for a nephrectomy?

1) Skin and subcutaneous tissue
2) External oblique muscle
3) Internal oblique muscle
4) Transversus abdominis muscle
5) Peritoneum

Answer 1

A subcostal flank incision for a nephrectomy transects the skin and subcutaneous tissue, external oblique muscle, internal oblique muscle, and transversus abdominis muscle.

Step-by-step explanation:

When a subcostal flank incision is used for a nephrectomy, the following layers are transected:

1. Skin and subcutaneous tissue: This is the outermost layer that covers the abdominal wall.
2. External oblique muscle: This is the first layer of muscle in the antero-lateral wall of the abdomen.
3. Internal oblique muscle: This is the second layer of muscle in the antero-lateral wall of the abdomen.
4. Transversus abdominis muscle: This is the third and deepest layer of muscle in the antero-lateral wall of the abdomen.

Therefore, the correct answer would be options 1, 2, 3, and 4.