trocar
Pronunciation: TROH-kar
A sharp, pointed surgical instrument used with a cannula to create access ports during laparoscopic procedures.
Full Definition
A trocar is a sharp, pointed surgical instrument that works in conjunction with a cannula to create access ports through the abdominal wall during minimally invasive gynecologic procedures. The trocar punctures tissue and is then withdrawn, leaving the cannula in place as a working port for inserting laparoscopic instruments. Different sizes (5mm, 10-12mm, 15mm) are used depending on the instruments required. In gynecologic surgery, trocars are essential for procedures like laparoscopic hysterectomy, ovarian cystectomy, and endometriosis treatment. Proper trocar placement is critical for patient safety, avoiding injury to major vessels and organs.
Usage
Usage note: Often confused with cannula in medical writing; the trocar is the sharp instrument that creates the port, while the cannula is the tube that remains in place.
In Context
- "The surgeon inserted a 12mm trocar at the umbilicus to accommodate the laparoscope and specimen removal bag." — Operative report
- "Care must be taken during trocar insertion to avoid injury to the inferior epigastric vessels." — Surgical safety protocol