Laparoscopic Cholecystectomy
Establishing the Critical View of Safety (CVS), managing the difficult gallbladder, and identifying bailout options before bile duct injury occurs.
1. Indications & Preoperative Prep
Laparoscopic cholecystectomy is the gold standard for symptomatic cholelithiasis, cholecystitis, and gallbladder polyps >1cm. Preoperative planning must include a review of LFTs to exclude choledocholithiasis.
Red Flags (Consider MRCP/ERCP first):
- Deranged LFTs (specifically raised Bilirubin or ALP)
- Dilated Common Bile Duct (CBD) >8mm on ultrasound
- History of gallstone pancreatitis or jaundice
2. Patient Position & Port Placement
The patient is positioned supine with a reverse Trendelenburg tilt and left lateral decubitus rotation to drop the colon and duodenum away from the liver bed.
Standard French Setup (Surgeon between legs)
- 10mm Umbilical (Camera)
- 10mm Epigastric (Operating hand)
- 5mm Right Midclavicular (Retraction)
- 5mm Right Anterior Axillary (Fundus retraction)
American Setup (Surgeon on patient's left)
- Identical port positions, but the operating surgeon uses the umbilical and epigastric ports while standing on the left side of the table.
3. The Critical View of Safety (CVS)
Bile duct injury (BDI) occurs in approximately 0.3% of laparoscopic cholecystectomies, most commonly due to misidentification of the CBD as the cystic duct. The CVS is mandatory before clipping any structure.
The 3 Pillars of the CVS
- Clear the hepatocystic triangle: All fat and fibrous tissue must be cleared from the triangle formed by the cystic duct, common hepatic duct, and inferior edge of the liver.
- Separate the lower third of the gallbladder: The gallbladder must be dissected off the liver bed to expose the cystic plate.
- Two, and only two, structures entering the gallbladder: The cystic duct and cystic artery. Once achieved, a 'window' behind these structures should be visible.
4. Dissection Protocol
Always begin dissection high on the gallbladder (infundibulum) and stay close to the wall. Never dissect downwards toward the CBD.
- Traction: Retract the fundus cephalad (towards the right shoulder) and the infundibulum laterally (towards the patient's right). This opens the hepatocystic triangle.
- Cautery: Use short bursts of monopolar hook diathermy. Avoid blind firing in the triangle of Calot due to the risk of thermal injury to the right hepatic artery or bile duct.
- Clipping: Apply two clips proximally (patient side) and one distally (specimen side) on both the cystic duct and artery.
5. Bailout Strategies
If the Critical View of Safety cannot be achieved due to severe inflammation (e.g., Mirizzi syndrome, contracted fibrotic gallbladder), do not push forward. Consider bailout options:
| Strategy | Indication | Drawback |
|---|---|---|
| Subtotal Cholecystectomy (Reconstituting) | Severe fibrosis at Calot's; posterior wall fused to liver. | Risk of recurrent stone formation in the remnant. |
| Subtotal Cholecystectomy (Fenestrating) | Unable to safely close the remnant; cystic duct stump left open. | High risk of temporary post-operative bile leak; requires a drain. |
| Conversion to Open | Bleeding that cannot be controlled laparoscopically, suspected malignancy, or total loss of planes. | Increased LOS, pain, and hernia risk. Not a failure, but a safe clinical decision. |
| Cholecystostomy Tube | Patient completely unstable; unable to tolerate pneumoperitoneum. | Requires definitive surgery at a later date. |
6. Frequently Asked Questions
When should I perform an intraoperative cholangiogram (IOC)?
Routine vs. selective IOC is debated. Strong indications for selective IOC include unclear anatomy, suspicion of CBD stones (dilated duct or elevated LFTs without preoperative MRCP), or suspicion of biliary injury.
What if there is bleeding from the liver bed?
Apply pressure with a swab for 5 minutes. Resist the urge to blindly electrocoagulate, as you may damage deeper hepatic venous branches. If bleeding persists, consider hemostatic agents (e.g., Surgicel) or argon plasma coagulation (APC).
How do I extract a large gallbladder through the umbilical port?
Always use an endobag. If the stones are too large, you may need to extend the fascial incision of the umbilical port, or use sponge forceps to break up the stones inside the bag before extraction.