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Acute Cholecystitis and Cholecystectomy: Complete Guide

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PART 1: ACUTE CHOLECYSTITIS

Definition

• Robbins Pathologic Basis of Disease, p.1841

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Epidemiology & Classification

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Pathophysiology

1. A stone obstructs the neck of the gallbladder or cystic duct
2. Chemical irritation ensues: mucosal phospholipases hydrolyze luminal lecithins into toxic lysolecithins
3. The protective glycoprotein mucus layer is disrupted, exposing mucosa to the direct detergent action of bile salts
4. Prostaglandins released within the distended gallbladder wall contribute to mucosal and mural inflammation
5. Increased intraluminal pressure compromises blood flow to the mucosa
6. These events initially occur WITHOUT bacterial infection; bacterial superinfection occurs later and exacerbates inflammation

• Primarily results from ischemia - the cystic artery is an end artery with no collateral circulation
• Contributing factors: wall edema (compromising blood flow), gallbladder stasis from biliary sludge and mucus causing functional cystic duct obstruction
• Risk factors: (1) sepsis with hypotension/multiorgan failure; (2) immunosuppression; (3) major trauma and burns; (4) diabetes mellitus; (5) infections
• Robbins Pathologic Basis of Disease, p.1841-1847

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Morphology (Pathological Features)

• Gallbladder is enlarged and tense, may show bright red, violaceous, or green-black discoloration from subserosal hemorrhages
• Serosa covered by fibrinous exudate (fibrinopurulent in severe cases)
• Lumen contains turbid bile mixed with fibrin, pus, and hemorrhage
• Obstructing stone present in neck/cystic duct in calculous form
• Mild cases: Gallbladder wall thickened, edematous, hyperemic
• Severe forms:
  • Empyema: Lumen filled with virtually pure pus
  • Gangrenous cholecystitis: Green-black necrotic organ with perforations
  • Emphysematous cholecystitis: Gas-forming organisms (Clostridia, coliforms) invade the wall
• Histology: Edema, congestion, mucosal erosion; neutrophils sparse unless superinfected
• Robbins Pathologic Basis of Disease, p.1852

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Clinical Features

• Prior episodes of biliary pain are common (but not universal)
• Attack begins with progressive RUQ or epigastric pain lasting >6 hours (distinguishes from biliary colic)
• Fever, anorexia, tachycardia, sweating, nausea, vomiting
• Most patients are afebrile initially - jaundice suggests common bile duct obstruction (Mirizzi syndrome or choledocholithiasis)
• Murphy's sign: Inspiratory arrest on deep palpation of RUQ (positive in ~80%)
• Boas' sign: Hyperesthesia below the right scapula (referred pain via phrenic nerve)
• Leukocytosis (WBC typically 12,000-15,000/mm³; >15,000 suggests gangrene or perforation)
• Mild elevations in alkaline phosphatase, bilirubin, and transaminases may occur

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Diagnostic Workup

• CBC (leukocytosis), LFTs (mild elevation common), serum bilirubin, amylase/lipase (exclude pancreatitis)
• Blood cultures if sepsis suspected

• Mulholland & Greenfield's Surgery 7e, p.461

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Severity Grading: Tokyo Guidelines (TG18)

• Sabiston Textbook of Surgery, p.1831

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Microbiology

• Gram-negative aerobic: E. coli, Klebsiella, Enterobacter, Proteus
• Gram-positive aerobic: Enterococcus, Streptococcus
• Anaerobes: ~15% of isolates; Clostridium species in emphysematous cholecystitis

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Management

• NPO (nothing by mouth)
• IV hydration and electrolyte restoration
• IV antibiotics - directed against above pathogens:
  • Mild-moderate: Cefoxitin (cephalosporin)
  • Severe: Piperacillin-tazobactam OR third-generation cephalosporin + metronidazole
  • Gangrenous/emphysematous: Must include anaerobic coverage
• Parenteral analgesia
• If source control achieved with surgery, post-op antibiotics not needed in mild-moderate cholecystitis
• Continue postoperative antibiotics in: severe infection, intraoperative perforation, gangrenous cholecystitis

• Sleisenger & Fordtran's GI & Liver Disease, p.1263

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Special Populations

• Diabetic patients: Higher frequency of infectious complications (sepsis); early cholecystectomy is warranted
• Elderly patients: Deceptively benign presentation but high rates of occult severe cholecystitis including empyema and gangrene; early cholecystectomy warranted
• High-risk surgical patients (severe liver/pulmonary/cardiac failure): Cholecystostomy (gallbladder drainage) preferred; percutaneous approach is standard
• Pregnancy: See recent 2025 meta-analysis (PMID 40610639) showing operative vs. nonoperative management data
• Septic/hemodynamically unstable patients: Percutaneous cholecystostomy tube provides source control; mortality up to 35% in severe cholecystitis

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Complications of Acute Cholecystitis

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PART 2: CHOLECYSTECTOMY

Overview

• 1882: Carl Langenbuch performed the first successful open cholecystectomy
• 1987: Philippe Mouret introduced laparoscopic cholecystectomy in France
• Laparoscopic approach rapidly became the gold standard and largely ended non-surgical therapies (lithotripsy, bile salts)
• Schwartz's Principles of Surgery 11e, p.1438

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Types of Cholecystectomy

1. Laparoscopic cholecystectomy - standard of care
2. Robotic cholecystectomy - equivalent outcomes, longer operative time
3. Open cholecystectomy - conversion or specific indications
4. Subtotal cholecystectomy (fenestrating or reconstituting) - for hostile hepatocystic triangle

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Indications

• Symptomatic cholelithiasis (biliary colic)
• Acute cholecystitis (early or interval)
• Chronic cholecystitis
• Gallbladder polyps >10mm or with risk features
• Biliary dyskinesia (ejection fraction <35%)
• Gallstone pancreatitis
• Porcelain gallbladder (if associated with malignancy risk)

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Contraindications

• Hemodynamic instability
• Uncontrolled coagulopathy
• Frank peritonitis

• Acute cholecystitis, gangrene, empyema
• Biliary-enteric fistulae
• Obesity, pregnancy
• Ventriculoperitoneal shunts
• Cirrhosis
• Previous upper abdominal surgery

• Schwartz's Principles of Surgery 11e, p.1396-1399

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Preoperative Preparation

• Labs: CBC, LFTs; LFT abnormalities may prompt MRCP or ERCP to exclude choledocholithiasis
• DVT prophylaxis: Low molecular weight heparin OR compression stockings
• Bladder: Patient empties bladder preoperatively (avoids urinary catheterization)
• Orogastric tube: Placed if stomach distended; removed at end of operation
• Informed consent: Must include possibility of conversion to open

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Laparoscopic Cholecystectomy: Surgical Technique

• Patient supine; surgeon stands at patient's left
• Split-leg positioning optional for ergonomic RUQ access
• One arm tucked if cholangiogram planned (for fluoroscopy maneuverability)
• Pneumoperitoneum established with CO₂ via:
  • Open technique (Hasson)
  • Closed Veress needle (supraumbilical)
  • Optical viewing trocar

• 5- or 10-mm supraumbilical port: camera (30° laparoscope)
• 10- or 12-mm epigastric port: main operating hand
• 5-mm right midclavicular line port: left-hand grasper
• 5-mm right flank port: retraction/assistance
• Additional ports may be added for difficult cases

• Lateral port grasper retracts gallbladder fundus cephalad over liver edge toward right shoulder
• Reverse Trendelenburg position with right-side-up tilt improves exposure
• Adhesions between omentum, duodenum, colon and gallbladder taken down first

• Midclavicular port grasper retracts gallbladder infundibulum posterolaterally
• Dissection starts just above the cystic duct takeoff
• Peritoneum, fat, and loose areolar tissue cleared from around cystic duct-gallbladder junction
• Cystic duct and cystic artery (usually parallel to duct, often behind Lund's/Calot's node) are identified

1. Hepatocystic triangle cleared of ALL fat and fibrous tissue
2. Lower one-third of gallbladder separated from the liver (cystic plate exposed)
3. Two and ONLY two structures seen entering the gallbladder (cystic duct + cystic artery)

• Small opening made in cystic duct; catheter inserted; contrast injected
• Confirms biliary anatomy, detects CBD stones
• Indocyanine green (ICG) fluorescent cholangiography now commonly used: real-time, no radiation, identifies biliary structures before clipping
• Particularly valuable in acute cholecystitis where inflammation distorts anatomy

• Cystic duct: clipped with 2 clips at base, 1 clip on gallbladder side, then divided
• Cystic artery: same clipping technique
• For dilated cystic duct too large for clips: endoloop, laparoscopic stapler, or suture closure

• Electrocautery used to dissect gallbladder from liver
• Watch for abnormal posterior ductal/arterial branches
• Before complete removal, use gallbladder as retractor for final field inspection
• Check for bleeding, bile staining, clip placement

• Removed through epigastric or umbilical incision, often with retrieval bag
• Fascial defect enlarged if stones are large or gallbladder very inflamed
• Retrieve any spilled stones

• NOT routinely required or recommended
• Consider if severely inflamed/gangrenous gallbladder, expected bile/blood accumulation
• Placed through 5-mm port under right liver lobe near gallbladder fossa
• Schwartz's Principles of Surgery 11e, p.1439-1440

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Critical View of Safety - Detail

• Consider subtotal cholecystectomy (fenestrating removes anterior wall; reconstituting closes the stump)
• Consider conversion to open
• Use IOC or ICG cholangiography to confirm anatomy

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Conversion to Open Cholecystectomy

• Patient unable to tolerate pneumoperitoneum
• Complication that cannot be fixed laparoscopically
• Important anatomic structures cannot be clearly identified
• No progress made over a set period

• Elective setting: ~5%
• Emergent/complicated disease: 10-30%

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Open Cholecystectomy

• Midline laparotomy OR (more commonly) right subcostal (Kocher) incision
• Dissection starts at fundus, working proximally to hepatocystic triangle (fundus-first technique)
• Same principles: identify, clip, and divide cystic artery and cystic duct; confirm CVS
• In difficult cases, the cystic duct can be suture-ligated

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Robotic Cholecystectomy

• Extension of the laparoscopic toolset; port placement and technique equivalent
• Advantages: 3D visualization, wristed instrument movement
• Outcomes: equivalent mortality and complication rates; slightly longer operative time
• Early concerns about higher BDI rates have not been confirmed in recent meta-analyses
• Sabiston Textbook of Surgery

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Complications of Cholecystectomy

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Intraoperative Cholangiogram (IOC) and ERCP Workflow

• If IOC reveals CBD stone → GI consult within 24h for post-op ERCP
• If choledocholithiasis suspected preoperatively with acute cholangitis → ERCP first, then cholecystectomy during same admission once cholangitis resolves

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Special Considerations

• Laparoscopic cholecystectomy is feasible in most cases
• Technical problems occasionally occur from severe inflammation obscuring hepatocystic triangle structures
• Cholangiography particularly valuable to confirm ductal anatomy
• Laparoscopic subtotal cholecystectomy or conversion to open are valid alternatives

• Routine use of surgical drains is NOT warranted and may be deleterious
• Sleisenger & Fordtran, p.332

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Recent Evidence (2025 PubMed Meta-Analyses)

• PMID 40610639 (2025): Operative vs. nonoperative treatment of acute cholecystitis during pregnancy - systematic review and meta-analysis confirming safety data for surgical approach during pregnancy
• PMID 40483437 (2025, World J Emerg Surg): Percutaneous treatment vs. cholecystectomy in acute cholecystitis - comparing outcomes of drainage vs. definitive surgery
• PMID 40266401 (2025): Incisional hernia after minimally invasive cholecystectomy - impact of comorbidities and surgical approach

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Summary Comparison: Laparoscopic vs. Open Cholecystectomy

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• Robbins, Cotran & Kumar Pathologic Basis of Disease (Robbins Pathology)
• Sleisenger & Fordtran's Gastrointestinal and Liver Disease
• Schwartz's Principles of Surgery, 11th Edition
• Mulholland & Greenfield's Surgery, 7th Edition
• Sabiston Textbook of Surgery
• Current Surgical Therapy, 14th Edition