How the da Vinci Robot Works in Gynaecological Surgery

The da Vinci robot works by reproducing the surgeon's hand movements, made at a console, through robotic arms and instruments inside the patient; it does not operate by itself. Dr. Deepika Aggarwal, Chief-Laparoscopic Gynae & Robotic Surgery, Artemis Hospitals, Gurugram, India, describes operating it with an analogy from the road: the surgeon is the driver, and foot pedals at the console work like a car's brake and clutch.

The robotic arms imitate every movement of the surgeon's hands, with magnification, precision and a range of view that a conventional laparoscope cannot match. The distinction matters. In gynaecological surgery, robotic surgery is not a different operation from laparoscopy. It is the same minimal access operation performed with better vision, greater precision and more reach, and those mechanical advantages are what drive the clinical outcomes.

How the da Vinci robot works: its three parts

The da Vinci system has three parts: the patient cart, the surgeon console and the vision cart. Each has a distinct role in the operating theatre.

The patient cart

The patient cart stands at the operating table and carries the robotic arms. The system has four arms, and Dr. Aggarwal performs most of her cases with three. The fourth is a retraction arm. Where no assistant is available, that arm takes the assistant's place, which means the surgeon is not dependent on a second pair of hands at the table in the way a laparoscopic surgeon is. For a hospital where trained assistants are scarce, that independence is a practical advantage as much as a technical one.

Docking is the step in which the cart is brought to the patient and the arms are placed. Once docked, whatever the surgeon does at the console is reproduced by the instruments inside.

The surgeon console

The console is where the surgeon sits and operates. It contains a highly magnified computer display that shows the operative field in three dimensions, the hand controls and the foot pedals. Small hand movements at the controls are translated to the arms in real time. The surgeon is physically separated from the patient, yet sees the anatomy in greater detail than a laparoscope allows.

The vision cart

The vision cart carries the image for the rest of the team. In Dr. Aggarwal's theatre there are two screens: a very large one and a smaller one, so that the whole team can follow exactly what the robot is doing inside the abdomen.

Robotic vs laparoscopic vision: 3D, magnification and a 360-degree view

The first technical difference between robotic and laparoscopic surgery is the camera. The robot uses a three-dimensional, high-definition camera. A laparoscope magnifies too, but Dr. Aggarwal describes the robotic view as giving almost 15 times better clarity. The manufacturer specifies magnification of up to 10 times for the system's three-dimensional high-definition camera.

The second difference is the range of view. In Dr. Aggarwal's description, a laparoscope can be angled through up to 180 degrees, while the robotic camera, controlled by buttons at the console, gives the surgeon 360-degree vision and can be directed into any angle or corner of the pelvis.

The system also adds a layer of warning: on-screen indicators and alerts appear on the surgeon's display, for example when an instrument is out of the camera's view or an arm reaches its range of motion.

How precise is the da Vinci robot?

Dr. Aggarwal describes the robot's precision as fine enough to peel the skin from a grape, and she uses that image to explain it to her patients. During the masterclass she showed a video of the robot doing exactly that.

The clinical value of that precision lies in dissection where any bleeding or imprecision carries a cost: removing ovarian cysts in young women who want to conceive, or separating organs that endometriosis has stuck together. These applications are discussed in fertility-sparing gynaecological surgery and its limits.

Key da Vinci instruments: vessel sealer, force bipolar, needle drivers and Firefly

Dr. Aggarwal singles out four instruments.

• Vessel sealer. She regards it as one of the finest instruments the robot offers. As the name suggests, it seals blood vessels and prevents bleeding. It is expensive, and she uses it especially in cancer surgery, where it gives her almost 99 to 100% confidence that the patient will not need a blood transfusion. Published series report low, but not zero, transfusion rates after robotic gynaecological surgery.
• Force bipolar. Her go-to instrument in most cases.
• Needle drivers. Used for suturing.
• Firefly. Used to visualise structures such as the ureter, the tube that carries urine from the kidney to the bladder, so that ureteric injury can be avoided.

Robotic vs laparoscopic surgery: outcomes, recovery and complications

Dr. Aggarwal attributes the safety of robotic surgery to three things: precision, magnification and wider vision. The effective sealing of vessels adds a fourth, because blood loss is lower than in laparoscopic surgery. Those mechanical advantages translate into outcomes that matter to patients.

Recovery time and hospital stay after robotic gynaecological surgery

Almost 90% of Dr. Aggarwal's robotic patients go home within 24 hours of surgery. After laparoscopic surgery the usual stay is a couple of days. In her experience, patients have less pain and recover faster after robotic surgery, and these advantages taken together shorten the hospital stay: patients are mobilised sooner after surgery. For patients who have travelled for surgery, a shorter stay also reduces the cost of the trip, a point developed in the complete guide to minimally invasive surgery in gynaecology.

Conversions, complications and readmissions

In benign gynaecology, Dr. Aggarwal points to four advantages over laparoscopy:

• Fewer conversions: the need to convert a robotic operation to open surgery is very rare.
• Fewer complications.
• Lower blood loss.
• Lower readmission rates, because complications are fewer.

She illustrated the comparison with a published graph setting laparoscopic against robotic surgery, in which reoperations and rehospitalisation were lower in the robotic group. Randomised evidence is less clear-cut: a 2019 Cochrane review of robot-assisted surgery in gynaecology found no clear difference in complication rates compared with conventional laparoscopy, and higher costs for the robot.

How often does robotic surgery convert to open surgery?

In Dr. Aggarwal's practice, one case in more than 500 has had to be converted to open surgery, meaning the operation was completed through a conventional abdominal incision. She had been operating robotically for over five years at the time of the masterclass and estimated her total at more than 500 robotic procedures.

Her approach to committing a patient to the robot is deliberate. Robotic surgery is expensive and patients pay substantially for it, so when she has any doubt about a case she first inserts a laparoscopic camera to assess and judge the situation. Only then does she proceed robotically.

The one conversion involved a woman in her thirties with multiple fibroids who had previously had two caesarean sections, both performed through midline incisions. During the operation an unexpected mass was found around her umbilicus. That location is significant, because the robotic incision is usually placed 3 to 4 cm above the umbilicus. When Dr. Aggarwal attempted to remove the mass to send it for examination, it began to bleed. Because the nature of the mass was unknown, the bleeding could not be controlled, and the operation was converted to an open procedure.

What forced the conversion was a combination of factors:

• an unexpected mass of unknown nature;
• its position close to the usual point of robotic entry;
• two previous midline incisions.

Her full answer to the question of how often conversion happens is on the masterclass Live Discussion page.

Why laparoscopic experience comes before the robot

The console, the arms and the camera reward a surgeon who already thinks in minimal access terms. Dr. Aggarwal's own route to the da Vinci platform ran through laparoscopy, and she regards that foundation as the paramount requirement. Someone who already performs a large volume of laparoscopic surgery gets to know the robot much faster; learning it de novo is a far greater challenge. The training pathway, from basic laparoscopy to robotic certification, is set out in the guide to minimally invasive gynaecological surgery.