Surgery Duration: What to Expect for Common Operations

Ever wonder how long you’ll be on the operating table? Knowing the typical length of a procedure helps you plan for recovery, arrange childcare, and set realistic expectations. Below we break down the average time for several popular surgeries and explain why some operations run longer than others.

Typical Times for Everyday Surgeries

Knee replacement – Most surgeons finish a total knee replacement in 60‑90 minutes. Add an extra 30 minutes for anesthesia set‑up and post‑op monitoring, and you’re looking at roughly two hours total.

Appendectomy – A straightforward removal of the appendix often takes 30‑45 minutes. Laparoscopic (keyhole) versions are on the shorter side, while an open appendectomy can stretch to an hour.

Cesarean section – A C‑section usually lasts 45‑60 minutes, not counting the time needed for anesthesia and newborn care. Emergency C‑sections might be faster, but they still need careful coordination.

Heart bypass (CABG) – Coronary artery bypass grafting is one of the longer surgeries, often 3‑6 hours depending on how many vessels need grafting and whether a beating‑heart technique is used.

Gallbladder removal – Laparoscopic cholecystectomy typically runs 45‑90 minutes. If the gallbladder is inflamed or there are complications, surgeons may switch to an open approach, adding an extra hour.

What Makes Surgery Time Vary?

Several factors can push an operation longer than the averages listed above:

• Patient health: Obesity, previous surgeries, or chronic illnesses can make anatomy harder to navigate.
• Complexity of the case: Multiple procedures in one session (e.g., combining a hip replacement with a fracture repair) add time.
• Surgeon experience: A seasoned surgeon often works faster, but they still pause for safety checks.
• Technology used: Robotic or minimally invasive tools can shorten incisions but may add set‑up time.
• Unexpected findings: Discovering extra scar tissue or an unnoticed condition can require extra steps.

All these elements are why your surgeon will give a personalized estimate during the pre‑op consultation.

Preparing for the day of surgery is as much about mental readiness as it is about logistics. Have a clear timeline in mind, arrange a ride home, and pack a small bag with essentials like a toothbrush and comfortable clothing. Knowing the approximate duration helps you keep the day stress‑free.

Remember, the clock on the operating table isn’t the whole story. Recovery time, pain management, and post‑op physical therapy often matter more for how quickly you get back to normal. Use the surgery duration as a guide, not a guarantee, and always trust your surgeon’s advice tailored to your unique situation.