This video demonstrate da vinci robotic surgery for endometriosis by Dr. R.K. Mishra at World Laparoscopy Hospital. Endometriosis is the place a certain type of bodily tissue - the lining of the uterus, also is called endometrial tissue - grows where it shouldn't. Often it can grow near the ovaries, but it may also appear on most pelvic organs.

In his lectures at World Laparoscopy Hospital, Dr. R.K. Mishra emphasizes that "a surgery well-begun is half-done." The success of any laparoscopic procedure depends entirely on safe abdominal access and the ergonomic placement of ports. Improper port positioning leads to "instrument clashing" and surgeon fatigue, whereas optimal positioning creates an effortless surgical flow.

1. Primary Access: Entering the Abdomen

The first step is creating the pneumoperitoneum (inflating the abdomen with $CO_2$). Dr. Mishra teaches three primary methods:

• Veress Needle Technique (Closed): A spring-loaded needle is inserted, usually at the umbilicus. Surgeons must perform safety tests (Aspiration test, Saline drop test, and Initial Pressure test) to ensure the needle is in the peritoneal cavity and not a blood vessel or bowel.

• Hasson Technique (Open): A small incision is made, and the layers of the abdominal wall are divided under direct vision. This is the safest method for patients with previous abdominal surgeries who may have adhesions.

• Direct Trocar Entry: Entering with a shielded trocar without prior insufflation—a technique reserved for highly experienced surgeons.

2. The "Law of Triangulation"

The core philosophy of Dr. Mishra’s port placement is the Principle of Triangulation. This ensures that the instruments and the camera work in harmony without interfering with one another.

• The Target: The organ being operated on (e.g., gallbladder or appendix).

• The Telescope (Camera): Placed at the apex of an isosceles triangle.

• The Working Ports: Placed at the base of the triangle on either side of the camera.

Optimal Angles: Dr. Mishra teaches that the ideal Azimuth Angle (the angle between the two working instruments) should be 60°, and the Manipulation Angle (the angle between the instrument and the target) should also be approximately 60° for maximum efficiency.

3. Optimal Port Positions for Common Procedures

A. Laparoscopic Cholecystectomy (Gallbladder)

• 10 mm Umbilical Port: For the telescope.

• 10 mm Epigastric Port: The primary working port (right hand).

• Two 5 mm Lateral Ports: Along the right subcostal margin for retraction (left hand and assistant).

B. Laparoscopic Appendicectomy

• 10 mm Umbilical Port: For the telescope.

• 5 mm Suprapubic Port: Working port.

• 5 mm Left Iliac Fossa Port: Working port.

• Note: This creates a triangle pointing toward the Right Iliac Fossa.

4. Ergonomics and the "Base-to-Target" Distance

Dr. Mishra highlights that ports should not be too close to the target organ.

• If the port is too close, the range of motion is restricted (like trying to write with a very short pencil).

• The ideal distance from the port to the target tissue is generally 15–20 cm. This allows for the "sweet spot" of the instrument's length to be used inside the body.

5. Avoiding Complications During Access

Dr. Mishra’s "Safety Check" for port insertion includes:

1. Avoid the Inferior Epigastric Vessels: Always transilluminate the abdominal wall with the telescope from the inside before placing lateral ports to avoid major bleeding.

2. Perpendicular Entry: The primary trocar should be inserted perpendicular to the abdominal wall to minimize the distance it travels through the muscle.

3. The "Lift" Technique: Always lift the abdominal wall manually or with towel clips during Veress needle insertion to create a "safety gap" between the wall and the intestines.

Summary of Optimal Positioning

Concept	Dr. Mishra's Gold Standard
Triangulation	60° angle between working instruments.
Working Distance	15–20 cm from port to target.
Camera Placement	Always placed between the two working hands.
Safety	Open (Hasson) access for scarred abdomens.

Conclusion

Mastering access and port placement is the bridge between being a "skilled" surgeon and an "efficient" one. By following Dr. R.K. Mishra’s ergonomic principles, surgeons can perform complex maneuvers with minimal physical strain and maximum patient safety.