Layers which are penetrated with trochar & cannula in production of pneumoperitoneum are
**Core Concept**
The production of pneumoperitoneum for laparoscopic surgery involves creating a controlled atmosphere of CO2 gas within the abdominal cavity. This process requires the insertion of a trocar and cannula, which must traverse through various layers of the abdominal wall to establish a safe and effective gas insufflation.
**Why the Correct Answer is Right**
The correct answer involves understanding the anatomical structure of the abdominal wall and the layers that must be penetrated to establish a pneumoperitoneum. The correct sequence is as follows:
- The skin and subcutaneous tissue are first incised and dissected to expose the underlying fascia.
- The fascia is then pierced by the trocar, followed by the peritoneum.
- The peritoneum is the innermost layer of the abdominal wall, and its penetration allows the CO2 gas to enter the peritoneal cavity.
- The correct sequence of layers is crucial to avoid injury to the underlying organs and to prevent complications such as bowel or vascular injury.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not accurately represent the correct sequence of layers penetrated during the production of pneumoperitoneum.
**Option B:** This option is also incorrect, as it reverses the correct sequence of layers.
**Option C:** This option is incorrect because it omits the fascia, which is a critical layer that must be penetrated to establish a pneumoperitoneum.
**Clinical Pearl / High-Yield Fact**
When performing laparoscopic surgery, it is essential to carefully identify and dissect the correct layers of the abdominal wall to avoid complications and ensure a safe and effective pneumoperitoneum.
**Correct Answer:** C.