Culture of safety
Bile duct injury is mostly a failure of perception, not of skill. Systems that assume the surgeon can be wrong protect patients.
Reviewed against its sources on 3 November 2026.
- Four pauses: the WHO sign-in and time-out, a pause at first view to grade and plan, a pause before clipping to say the Critical View aloud, and the sign-out.
- Most injuries are errors of perception by confident surgeons; the assistant and anaesthetist are the safety system.
- Document the grade, the view and any bail-out; debrief difficult cases and take injuries to M&M for learning.
01Why culture matters more than skill
- If the problem is perception, the solution is not better hands. It is a system that assumes the surgeon can be confidently wrong and gives other people and other steps the chance to catch it.
- Good units share cheap habits: the same standard operation every time; defined decision points with named actions; anyone in the room can stop the operation; documentation another surgeon could check; routine review without blame.
- The 2020 consensus endorses a “culture of safety” by name: the pause before clipping, calling for help, bail-out.
Sources
Way et al., Ann Surg 2003 Observational; in most cases the surgeon did not recognise the injury during the operation. Brunt et al., Ann Surg 2020 Guideline (expert opinion statements).
02The six SAGES strategies, by name
- Use the Critical View of Safety to identify the cystic duct and artery (CVS page).
- Understand the potential for aberrant anatomy in all cases (anatomy).
- Make liberal use of cholangiography or other imaging of the biliary tree (cholangiography, ICG).
- Consider an intra-operative momentary pause before clipping, cutting or transecting any ductal structure.
- Recognise when the dissection is approaching a zone of significant risk and halt; finish by a safe method other than cholecystectomy if conditions are too dangerous (bail-out).
- Get help from another surgeon when the dissection or conditions are difficult.
Gupta and Jain extend these to ten tenets: knowledge of anatomy and landmarks, prediction of difficulty, correct retraction, the doublet view and its documentation, and a time-out at each decision point.
Sources
SAGES Safe Cholecystectomy Program, adopted as recommendations in Brunt et al., Ann Surg 2020 Guideline; Gupta and Jain, World J Gastrointest Surg 2019.
Evidence: recommendation strength and certainty
2020 multi-society guideline: recommendation and certainty
Recommendation strength and evidence certainty describe different things. A strong recommendation can rest on low or very low-certainty evidence when the balance of benefit and harm warrants it. Expert-opinion statements should not be presented as trial-proven effects.
| Situation | Recommendation | Strength and evidence |
|---|---|---|
| CVS for anatomical identification (Q1) | Use CVS to identify the cystic duct and artery. | Expert opinion; no direct comparative evidence establishing superiority. |
| Uncertain anatomy or suspected BDI (Q4) | Use intraoperative biliary imaging, particularly IOC. | Strong recommendation; very low certainty. |
| BDI recognised or highly suspected (Q18) | Refer promptly to an experienced BDI surgeon at an institution with a multidisciplinary hepatobiliary team; obtain prompt specialist consultation if timely referral is not feasible. | Strong recommendation; low certainty. |
| Acute cholecystitis or a history of it (Q4) | Use IOC liberally. Appropriately trained surgeons may use laparoscopic ultrasound as an alternative. | Conditional recommendation; very low certainty. |
| ICG near-infrared imaging (Q5B) | May be considered as an adjunct to white light for identifying biliary anatomy. It does not replace good dissection and identification. | Conditional recommendation; very low certainty. The technique safeguard is expert opinion. |
| CVS unobtainable and anatomy still undefined (Q2) | Consider subtotal cholecystectomy over total fundus-first cholecystectomy when other methods, such as imaging, have not clarified the anatomy. | Expert opinion. |
| Pause before clipping or division (Q13) | Pause to confirm that the CVS criteria have been attained. | Expert-opinion best practice; insufficient evidence for an evidence-based recommendation. |
| Conversion to open to prevent BDI (Q12) | The guideline does not establish conversion itself as a method of reducing BDI. | No recommendation: insufficient comparative evidence. |
| Video versus photographic documentation (Q3) | No preferred documentation modality was recommended; this does not imply that documentation is unhelpful. | No recommendation: panel disagreement and feasibility, acceptability and medicolegal concerns. |
CVS for anatomical identification (Q1)
- Recommendation
- Use CVS to identify the cystic duct and artery.
- Strength and evidence
- Expert opinion; no direct comparative evidence establishing superiority.
Uncertain anatomy or suspected BDI (Q4)
- Recommendation
- Use intraoperative biliary imaging, particularly IOC.
- Strength and evidence
- Strong recommendation; very low certainty.
BDI recognised or highly suspected (Q18)
- Recommendation
- Refer promptly to an experienced BDI surgeon at an institution with a multidisciplinary hepatobiliary team; obtain prompt specialist consultation if timely referral is not feasible.
- Strength and evidence
- Strong recommendation; low certainty.
Acute cholecystitis or a history of it (Q4)
- Recommendation
- Use IOC liberally. Appropriately trained surgeons may use laparoscopic ultrasound as an alternative.
- Strength and evidence
- Conditional recommendation; very low certainty.
ICG near-infrared imaging (Q5B)
- Recommendation
- May be considered as an adjunct to white light for identifying biliary anatomy. It does not replace good dissection and identification.
- Strength and evidence
- Conditional recommendation; very low certainty. The technique safeguard is expert opinion.
CVS unobtainable and anatomy still undefined (Q2)
- Recommendation
- Consider subtotal cholecystectomy over total fundus-first cholecystectomy when other methods, such as imaging, have not clarified the anatomy.
- Strength and evidence
- Expert opinion.
Pause before clipping or division (Q13)
- Recommendation
- Pause to confirm that the CVS criteria have been attained.
- Strength and evidence
- Expert-opinion best practice; insufficient evidence for an evidence-based recommendation.
Conversion to open to prevent BDI (Q12)
- Recommendation
- The guideline does not establish conversion itself as a method of reducing BDI.
- Strength and evidence
- No recommendation: insufficient comparative evidence.
Video versus photographic documentation (Q3)
- Recommendation
- No preferred documentation modality was recommended; this does not imply that documentation is unhelpful.
- Strength and evidence
- No recommendation: panel disagreement and feasibility, acceptability and medicolegal concerns.
Table checked against the supplied guideline on 26 October 2026. Source: Brunt et al., Surgical Endoscopy 2020;34:2827–2855, questions as numbered above. Paraphrased for CALOT. Guideline
Read alongside newer imaging guidance. The 2025 SAGES guideline conditionally favours IOC, including routine rather than selective use and IOC rather than ICG fluorescence. Its 2026 clarification emphasises patient circumstances, surgeon experience and institutional resources. These conditional recommendations are not a universal mandate. 2025 guideline · 2026 clarification · CALOT imaging page.
03Pauses: four, not one
1. Before the incision
The WHO checklist, plus: the imaging result (duct clear? stone? ERCP done?), the plan for cholangiography or ICG (given at the right time), the expected difficulty grade, and the bail-out plan.
“If we cannot get the critical view we do a subtotal, and the consultant is Mr X on extension Y”
2. At first view
Before any dissection: grade the difficulty (Nassar or Parkland), say the plan and the bail-out aloud, and call for help now if the grade says so. A time rule agreed here (“no Critical View at 60 minutes: call”) is a prompt to reassess, never permission to carry on dissecting.
“Grade 3, contracted and stuck to the duodenum: posterior window first, subtotal if the neck will not come, and I want Mr X in the building.”
3. Before clipping
A brief check to reduce the risk of misidentification. The surgeon states the landmarks and the three CVS criteria out loud, and asks the assistant whether they agree. It takes about fifteen seconds. Expert opinion, widely adopted
“Two structures and only two entering the gallbladder, lower third off the liver, triangle clear of fat; this is the cystic duct; do you agree?”
4. Sign-out
Specimen, counts, drain, and: was the CVS achieved, any leak, spillage, bleeding or concern, and what do we tell the patient and the ward?
Where “I am a bit worried about that structure” gets said, instead of remembered at 3 a.m.
Sources
Deng et al., Art of Surgery 2021; SAGES strategy 4. If any element is not true, say so and do not clip.
04Speaking up and the assistant
- The assistant is the only other person who can see the anatomy. In most injuries the assistant was a junior who did not know the CVS or did not feel able to say “I do not think that is the cystic duct”. Both are fixable.
- Teach every assistant the three criteria and the doublet view before their first case, and tell them they are expected to challenge. Make the challenge a routine question at the second time-out, not an act of courage.
- Graded assertiveness: “I am not sure that is the cystic duct” → “I am concerned that structure is the common duct” → “I think we should stop and do a cholangiogram”.
- A phone call for a colleague is never wrong and no competent colleague minds.
The anaesthetist is the other adult in the room. Say at the time-out that this is a Nassar grade 4, that bleeding or conversion is possible and the operation may take two hours. They then control the two things that most reliably make a bad operation safer: time (“the patient is stable, there is no rush”) and a second surgeon (making the call while your hands are occupied).
Source
Second opinion when the anatomy is unclear: Brunt et al., 2020.
05Documentation that protects the patient
- Indication; difficulty grade (Parkland or Nassar); findings (adhesions, inflammation, sulcus seen or not, anatomy).
- How the cystic structures were identified: the three criteria stated, or why the CVS could not be achieved and what was done instead. “CVS achieved” alone is not documentation.
- Cholangiography or ICG and what it showed; control of duct and artery; spillage and retrieval; blood loss; drains; fascial closure; the plan and who to call.
- Photograph the doublet view; a 30-second clip is better. A photograph routinely taken is a photograph routinely looked at. Document the time-outs.
- Difficult operation: dictate the note yourself, the same day, and write what you thought at the time, not what you hope was true.
Source
Surgeons overestimate the quality of their own CVS; reviewed by others, the view is often judged inadequate (Castro et al., ABCD 2018).
06Debriefing, morbidity and mortality, and audit
- A two-minute debrief at the end of every list: what went well, what would we change, is anyone worried about any patient. The cheapest safety intervention known.
- A difficult case, bail-out, conversion or injury: debrief within days, whole team, framed as “what made it hard to see?” not “who was at fault?”.
- Present every subtotal and every conversion at M&M as decisions to be examined, not failures. That normalises bail-out.
- Audit: CVS documentation, cholangiography, subtotal, conversion, bile leak, bile duct injury, readmission and day-case rates, against national data (CholeS and GIRFT in the UK; AMBROSE internationally). Expert opinion
07Cognitive biases in the difficult cholecystectomy
| Bias | How it shows | Counter |
|---|---|---|
| Confirmation bias, the perceptual illusion | Once a structure is “the cystic duct”, every finding confirms it; the “aberrant duct” is the common hepatic duct | Try to disprove it: ask what you would see if this were the common duct, then look for that. Doublet view. Ask the assistant |
| Sunk cost, plan continuation | After 90 minutes, stopping feels like waste | A time rule agreed beforehand (“no CVS at 60 minutes: call for help”); name the bail-out at the time-out so it is the plan, not a defeat |
| Overconfidence | The expert is injured by the “easy” gallbladder; the trainee by not knowing what they do not know | The standard operation every time; the pause is for everyone |
| Anchoring on the label | “Simple elective colic” on the list; a contracted scarred gallbladder is discounted | Grade at first view, say it out loud, re-grade if it changes |
| Authority gradient | The assistant sees it and says nothing; the anaesthetist waits to be asked | Invite challenge explicitly; thank every challenge, even a wrong one |
| Fatigue, production pressure | Last case, overrun, next patient waiting | Say it out loud; the operation takes the time it takes; a subtotal is faster than a bile duct injury |
| Normalisation of deviance | “We never do cholangiograms here” | Audit and M&M; measure what is done, not what is believed |
08What high-performing units do
- A written unit standard: the CVS as the method, the pause, named bail-outs, the referral pathway for a suspected injury.
- Routine, audited photographs of the CVS.
- Cholangiography ready on every list, set up in minutes; ICG where available, as an adjunct.
- A consultant within minutes of the emergency list and of trainee lists.
- A hepatobiliary unit’s number on the theatre wall, and the principle: a suspected major injury is drained and referred, not repaired locally.
- Subtotal cholecystectomy taught as a planned procedure, on a simulator and selected cases, before it is needed.
- Honest data: every leak, injury and readmission presented against benchmarks.
09What examiners ask
- What is the “second time-out” and what is said at it?
- Your registrar is not sure that is the cystic duct. What do you do and say?
- How does your unit audit cholecystectomy, and which numbers do you want to see?
- Three cognitive biases relevant to bile duct injury and the counter for each.
- What belongs in the note of a difficult cholecystectomy?
Test yourself further: Practise questions on Culture of safety in the Exam zone.