Robotic and single-incision cholecystectomy
A new platform does not change the anatomy or the rules. The injury data say it may change the learning curve.
Reviewed against its sources on 22 October 2026. Open checks: Kalata 2023 and Mullens 2026 figures come from abstracts.
- Three large Medicare studies found two to three times more bile duct injuries needing repair after robotic cholecystectomy.
- The data are observational and blind to experience and technique; they do not let you call the robot safer.
- Single-incision surgery gave better cosmesis and seven times the hernia rate; it has largely gone.
01What the robot changes, and what it does not
Changes
A stable three-dimensional view, wristed instruments, a camera the surgeon controls, and a comfortable seat. For many surgeons the cholecystectomy is where they learn the platform before harder robotic operations.
Does not change
The anatomy, the variants, the Critical View of Safety, the difficulty grade or the bail-outs. Every rule on this site applies at the console. Expert opinion
Costs
Capital, instruments, docking time and a team that knows the platform. No trial has shown a patient benefit over laparoscopy for a routine cholecystectomy. Contested
02The bile duct injury debate
- Three large United States Medicare studies have found two to three times more bile duct injuries needing repair after robotic cholecystectomy than after laparoscopy, with similar overall complications.
- The data are observational, from older patients, and say nothing about the individual surgeon’s experience. They do not prove the robot causes injury. They do mean you cannot tell a patient the robot is safer.
- The excess was not explained by sicker patients: it held in low, medium and high-risk groups.
- An instrumental-variable analysis in the 2023 study still found a higher rate (0.4 versus 0.2 percent, relative risk 1.88).
- Overall complications and readmissions were similar; reoperations were more common after robotic surgery.
- Surgeon experience, case selection, whether the CVS was used, or whether a cholangiogram was done.
- Conversions were not captured, so converted cases may hide in the open group.
- The patients were over 65 and insured by Medicare. Younger patients and other health systems may differ.
- Whether the excess is a learning curve that will close. The 2026 authors think it may be.
Contested The editorial response argued that robotic growth came mostly from moving simple cases off the laparoscopic list, often to train surgeons on the platform, and warned against unrestrained use of the cholecystectomy as a training case.
Sources
Kalata et al., JAMA Surg 2023 (summary; the paper is at JAMA Surgery, published September 2023): more than one million Medicare patients. Editorial critique: Hepatobiliary Surg Nutr 2024. Mullens et al., JAMA Netw Open 2025 (e251705): 737,908 patients. Mullens et al., JAMA Surg 2026 (summary): 379,970 patients, 58,045 robotic. Observational The primary papers sit behind publisher access; the figures above are taken from the journal abstracts as reported in the linked summaries.
03Single-incision cholecystectomy
- One umbilical wound. Cosmesis scores and patient preference favoured it at a year in the trial.
- Instruments that clash, a camera in line with the hands, and a weaker view of the triangle. Retraction of the fundus and neck, the basis of the CVS, is harder. Expert opinion
- A bigger fascial defect and a higher hernia rate.
- It has largely fallen out of routine use. Expert opinion
Source
Marks et al., J Am Coll Surg 2013: prospective, randomised, multicentre, single-blinded; total hernia 10 of 119 versus 1 of 81 (p = 0.03); adverse events otherwise similar. Randomised trial
04Adopting a new platform safely
The same rules as for any new technique. Expert opinion
- Train before you treat: simulator, dry lab, then proctored cases.
- Simple cases first, but the CVS still applies. A simple case is where injuries happen when attention is on the machine.
- Keep the stop rules. No progress after 30 minutes, a triangle that will not clear, a structure you cannot name: imaging, a second surgeon, a bail-out or an undock. See bail-out strategies.
- Audit your own numbers: injuries, leaks, conversions, time, cost. Compare them with your laparoscopic results, not with a brochure.
- Tell the patient the truth: what the platform is, your experience with it, and what the published data show. See consent.
05What examiners ask
- What is the evidence on bile duct injury after robotic cholecystectomy, and what are its limits?
- A patient asks for “the robot because it is safer”. What do you say?
- Why has single-incision cholecystectomy not replaced the four-port operation?
- How would you introduce a new platform into your unit?
Test yourself further: Practise questions on Robotic and single-incision in the Exam zone.