tg13: updated tokyo guidelines for acute cholecystitis
TRANSCRIPT
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TG13: UPDATED TOKYO GUIDELINES FOR ACUTE
CHOLECYSTITISJibran Mohsin
Resident, Surgical Unit ISIMS/Services Hospital, Lahore
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Background
■ Before TG07, there were no practical guidelines through out the world primarily targeting acute cholecystitis
■ TG07 was updated after – total 35 meetings of Tokyo Guidelines Revision Committee for revision
of TGO7(TGRC) – email exchanges with co authors abroad e.g. USA, Netherlands, UK,
Germany, New Zealand, India, Korea, China, Greece, Hong Kong, Italy, Philippines, Taiwan, Singapore, Argentina, Australia and Malaysia
– 3 International Meetings for the Clinical Assessment and Revision of Tokyo Guidelines
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OUTLINE
■ Terminology, Etiology and Epidemiology■ Diagnostic Criteria■ Severity assessment criteria/grading■ Differential Diagnosis■ Management
– Antimicrobial therapy– Gallbladder drainage– Surgical management
■ Summary– Management bundle– Acute Cholecystitis Bundle Checklist
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Terminology, Etiology and Epidemiology
■ Definition
– Acute inflammatory disease of gallbladder, often attributable to gallstones, but many factors such as ischemia, motility disorders, direct chemical injury, infections by microorganism, protozoon and parasites, collagen disease, and allergic reaction are also involved
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Terminology, Etiology and Epidemiology■ Pathophysiology
– Gallstones are the cause of acute cholecystitis in majority of cases
– Involves physical obstruction at neck or in cystic duct by gallstone– Leading to increased pressure in GB– Determined by degree of obstruction and duration of obstruction
■ i.e. partial and short duration biliary colic■ Complete and long duration Acute cholecystitis■ If early treatment not given severe disease and risk of
complications
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Terminology, Etiology and Epidemiology■ Pathological Classification
STAGE FINDINGSEdematous Cholecystitis
1st Stage 2-4 days • Interstitial fluid with dilated capillaries and lymphatics• Edematous wall (sub serosal layer) of GB• Intact GB tissue
Necrotizing Cholecystitis
2nd Stage 3-5 days • Edematous changes with areas of hemorrhage and scattered necrosis (superficial, not full thickness)
• Vascular thrombosis and occlusionSuppurative Cholecystitis
3rd Stage 7-10 days • WBC infiltration with areas of necrosis and suppuration• Active repairing process of inflammation• Contracted and thick wall due to fibrosis• Intramural (not entire thickness) and pericholecystic
abscessesChronic Cholecystitis • Repeated attacks of mild
cholecystitis• Mucosal atrophy and fibrosis of GB wall
• Chronic irritation by large gallstones
• Acute on chronic cholecystitis • Neutrophil invasion + lymphocyte/plasma cell infiltration
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Terminology, Etiology and Epidemiology■ Special forms of acute cholecystitis
Acalculous Cholecystitis Acute cholecystitis wtihout cholecystoithiasis
Xanthogranulomatous cholecystits • Cholecystitis with xanthogranulomatous thickening of GB wall and raised GB pressure due to stones with rupture of Rokitansky-Aschoff sinuses.
• Leakage and entry of bile into GB wall, ingested by histiocytes to form granulomas containing foamy histiocytes
Emphysematous Cholecystitis • Air in GB wall due to gas-forming anaerobes including Clostridium perfringens
• Often seen in diabetes and likely to progress to sepsis and gangrenous cholecystitis
Torsion of GB • INHERITED FACTORS: floating GB• ACQURIED FACTORS: splanchoptosis, senile humpback, scoliosis, weight
loss• PHYSICAL FACTORS: sudden change in intraperitoneal pressure, sudden
change of body position, pendulum-like movement in anteflexion position, hyperperistalsis of organs near GB, defecation, and blow to abdomen
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Terminology, Etiology and Epidemiology■ Advanced forms of and the type of complications of acute
cholecystitis
Perforation of gallbladder • Due to acute cholecystitis, injury or tumors • Most frequently due to ischemia and necrosis of GB wall
Biliary Peritonitis • Due to cholecystitis-induced GB perforation, trauma, and detached catheter during biliary drainage and incomplete suture after biliary operation
Pericholecystitic abscess • Perforation of GB covered by surrounding tissue along with formation of abscesses around GB
Biliary fistula • Between GB and duodenum following an episode of acute cholecystitis• Due to large stone eroding through GB wall into duodenum• Can also cause gallstone ileus (mechanical obstruction by stone at ileocecal
valve)
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Terminology, Etiology and Epidemiology■ Incidence
– Around 10 % of general population have gallstones
– 20-40 % of asymptomatic gallstone have risk for developing some type of S/S. (1-3 % annually)
– 1-2 % asymptomatic and 1-3 % mild symptomatic gallstones annually present with severe symptoms or complications (acute cholecystitis/cholangitis/ pancreatitis and severe jaundice)
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Terminology, Etiology and Epidemiology■ Incidence
– Acute cholecystitis – most frequent complication of cholelithiasis (3.8 - 12 %)
– 6.0 % cases are of severe (accompanying organ dysfunction- Grade III) acute cholecystitis
– 0.2 – 1.0 % cases of ERCP develop acute cholystitis
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Terminology, Etiology and Epidemiology■ Etiology
– 90-95 % gallstones– 3.7 – 14 % acalculous cholecysytitis
■ Mechanism– Gallstone Cystic duct obstruction bile stasis activation of
inflammatory mediators and mucosal injuries
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Terminology, Etiology and Epidemiology■ Risk Factors
– “4Fs” ( forties, female, fat, fair) and “5Fs” ( 4Fs + fecund or fertile) associated with lithogenesis in GB but no established association with acute cholecystitis except obesity
– Drugs: Hormone replacement therapy (2X), thiazides?, Hepatic artery chemotherapy, statins (protective)
– AIDS (AIDS cholangiopathy and acute acalculous cholecystitis)
– Parenteral Nutrition, thermal burn, infection, surgery, trauma, long term ICU stay
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Terminology, Etiology and Epidemiology■ Prognosis
Mortality rateGrade I 0.6 %Grade II 0 %Grade III 21.4 %overall 1.7 %
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Terminology, Etiology and Epidemiology
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Diagnostic Criteria
■ Murphy’s (1903) sign shows high specificity( 79 – 96 %), however the sensitivity has been reported low ( 50-65 %), thus not applicable in making a diagnosis of acute cholecystitis due to low sensitivity
TG13 Diagnostic criteria for acute cholecystitisA. Local signs of inflammation etc.
1. Murphy’s sign2. RUQ mass/pain/tenderness
B. Systemic signs of inflammation etc.
1. Fever2. Elevated CRP 3. Elevated WBC count
C. Imaging findings Characteristic of acute cholecystitis
SUSPECTED DIAGNOSIS: one item in A + one item in BDEFINITE DIAGNOSIS: one item in A + one item in B + C
Sensitivity (91 %)
Specificity (97%)
IMAGING:USGCTTc-HIDA scans
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Diagnostic Criteria■ Most typical clinical sign of acute cholecystitis is abdominal pain ( RHC or
epigastric) -72-93 %■ Followed in frequency by nausea and vomiting■ Fever >38OC only in 30 % cases■ Muscular defense (guarding) in 50 % cases■ Palpable tumors, rebound tenderness, stiffness (rigidity) are rare
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Diagnostic Criteria
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Diagnostic Criteria
■ No specific blood tests for making a diagnosis of acute cholecystitis
– General inflammatory findings (> 10,000 mm3/dL TLC, > 3 mg/dL CPR level)
– Mild increase of serum enzymes in hepatobiliary system– Raised bilirubin (up to 4 mg/dL) even in absence of complications
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Diagnostic Criteria
■ Ultrasonography should be performed at the initial consultation for all cases for which acute cholecystitis is suspected (satisfactory diagnostic capability even if done by ER physicians)
■ Ultrasonography shows 50-88 % sensitivity and 80-88 % specificity
■ Diagnostic if all of following are present– Thickening of GB wall (5mm or more)– Pericholecystic fluid– Direct tenderness when probe is pushed against GB (ultrasonographic
Murphy’s sign – superior to ordinary Murphy’s sign in that it is possible to press GB accurately i.e 90 % sensitivity and specificity)
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Diagnostic Criteria
■ Others– GB enlargement, GB stones(13 % cases), debris echo and gas
imaging– sonolucent(hypoechoic) layer, referred to as a low-echo zone (8 %
sensitivity, 71 % specificity)– Low-echoic area with an irregular multiple structure (62 %
sensitivity, 100 % specificity)
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Diagnostic Criteria
■ Findings on contrast enhanced CT characteristic of acute cholecystitis– GB distension (41 %)– Pericholecystic fat stranding/density (52 %)– GB wall thickening (59 %)– Subserosal edema (31 %)– Mucosal enhancement– Transient focal enhancement of liver adjacent to gallbladder due to increased venous
flow in cholecystic vein draining directly into liver parenchyma ( during arterial phase of dynamic CT, disappears during portal and equilibrium phase)– Pericholecystic fluid collection (31 %)– Pericholecystic abscess– Gas collection within GB– High- attenuation GB bile (24 %)
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Diagnostic Criteria
■ Tc-HIDA scan– GB normally visualized within 30 min if cystic duct is patent i.e. no cholecystitis
– Failure of GB to fill within 60 min after administration of tracer obstructed cystic duct
– 80-90 % sensitivity for acute cholecystitis
– False positive largely explained by cystic duct obstruction induced by chronic inflammation and some cases normal GB don’t fill due to SOD
– “Rim sign” = blush of increased pericholecystic radioactivity (30 % cases)
– Significantly higher specificity and accuracy than US
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Diagnostic Criteria
US versus Tc-HIDA scan■ Gold standard is Tc-HIDA scan■ BUT initial investigation of choice is US
– Immediate availability– Easy access– Lack of interference by elevated serum bilirubin levels
(cholestasis interferes with biliary excretion of agents used for scintigraphy)
– Absence of ionizing radiation– Information regarding presence of stone
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Severity assessment criteria/grading
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Differential Diagnosis
■ Gastric and Duodenal ulcer■ Hepatitis■ Pancreatitis■ GB cancer■ Hepatic abscess■ Fitz-Hugh-Curtis syndrome■ Right lower lobar pneumonia■ Angina pectoris/MI■ UTI
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Flowchart for management
1st Line T/M
Surgical risk
1st Line T/M
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Management
■ Initial medical treatment while considering for surgery and ER drainage– Nill By Mouth– IV hydration and electrolytes correction– Antimicrobial– Analgesic– Respiratory and hemodynamic monitoring
■ Appropriate organ support in severe acute cholecystitis– Artificial respiration, intubation and vasopressors – along with ER drainage/cholecystectomy
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Management
■ Analgesics should be initiated in early stage as it doesn’t affect positive rate of sonographic Murphy’s sign
■ NSAID (diclofenac 75 mg IM) administration is effective for impacted stones attack for PREVENTING acute cholecystitis
■ NSAID also effective for improvement of GB function in chronic cholecystitis
■ NOT effective to improve the course of cholecystitis after its acute onset
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Antimicrobial therapy
■ Primary Goal– To limit both systemic septic response and local inflammation– To prevent SSI (superficial, deep, organ space)– To prevent intrahepatic abscess formation
■ Early and non-severe cases Prophylactic■ Others with SIRS therapeutic
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Antimicrobial therapy
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Antimicrobial therapy
■ Bile cultures should be obtained at the beginning of any procedure performed. GB bile should be sent for culture in all cases of acute cholecystitis expecting those with grade I severity
■ TG13 suggest cultures of bile and tissue when perforation, emphysematous changes, or necrosis of GB are noted during cholecystectomy
■ Blood cultures are not routinely recommended for grade I community-acquired acute cholecystitis
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Antimicrobial therapy
■ Factors influencing the selection of antimicrobial agents for acute cholecystitis– Targeted organisms– Pharmacokinetics– Pharmacodynamics– Local Antibiogram (local epidemiology and susceptibility data)– H/O antimicrobial usage (< 6 months, increased risk of resistance)– Renal and hepatic function (Dosage adjustment)– H/O of allergies and other adverse events
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Antimicrobial therapy
■ Initiated as soon as diagnosis of acute cholecystitis is suspected– For case in septic shock, within 1 h of recognition– For other cases, as long as 4 h may be spent obtaining definitive
diagnostic studies prior to beginning antimicrobial therapy– Should definitely be started before any procedure (endoscopic or
operative)
■ Anaerobic therapy is appropriate if biliary-enteric anastomosis is present
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Antimicrobial therapyVelosef (Cephradine)Oxidil (Ceftriaxone)Zinacef (Cefuroxime)
Tanzo/Tazocin (Piperacillin/tazobactam)Teinam (Imipenem/cilstatin)Meronem (Meropenem)
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Antimicrobial therapy
■ Historically, biliary penetration of agents has been considered in selection of antimicrobial agents
■ However, there is considerable lab and clinical evidence that as obstruction occurs, secretion of antimicrobial agents into bile stops. (need RCT to determine clinical relevance and significance of biliary penetration in treating acute cholecystitis)
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Antimicrobial therapy
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Antimicrobial therapy
Patients who can tolerate oral feeding may be treated with oral therapy.
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Antimicrobial therapy
Use of Antibiotic irrigation■ Irrigation of surgical fields with antimicrobial agents■ Clearly effective in reduction of wound infection ■ May be effective as effective as use of systemic antimicrobial agents
■ Combined use of systemic and topical antimicrobial agents may have additive effects (especially if different agents are used)
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GB DrainageGB Drainage
Percutaneous Trans hepatic GB
Drainage (PTGBD)Aspiration (PTGBA)
Endoscopic transpapillary
Naso(-biliary) GB drainage (ENGBD)
GB stenting (EGBS)
Endoscopic Ultrasound (EUS)-guided
Naso(-biliary) GB drainage
GB stenting
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GB Drainage
■ Percutaneous transhepatic GB drainage (PTGBD)– Recommended essential Standard GB drainage method for
surgically unfit patients with acute cholecystitis
– Safe alternative to one-shot definitive treatment in form of early cholecystectomy in surgically high risk populations e.g. mortality rate in elderly or critically ill patients up to 19 %
– Low complication rate 0-13 % with procedure related mortality 0.36 %
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GB Drainage
■ Grade II only when patient does not respond to conservative treatment
■ Grade III recommended with intensive care
■ PREDICTOR FOR FAILURE OF CONSERVATIVE TREATMENT:AT 24-h and 48-h follow-up
• WBC >15000 cell/µl• Elevated temperature• Age > 70 years
AT ADMISSION
• Age > 70 years• Diabetes• Tachycardia• Distended GB
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GB Drainage
6- to 10-Fr pigtail catheter
Under fluoroscopy(Seldinger technique)
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GB Drainage
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GB Drainage
INDICATION: end-stage liver disease (in whom percutaneous approach is difficult to perform)
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GB Drainage
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GB Drainage
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GB Drainage
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GB Drainage
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Surgical ManagementGrade I (mild) EARLY laparoscopic CholecystectomyGrade II (moderate)
MOST CASES EARLY laparoscopic or open cholecystectomy (within 72 hr after onset of acute cholecystitis) in experienced centers
“difficult gallbladder” ( severe local inflammation i.e. >72 h from onset, WBC count >18,000 and palpable tender mass in RUQ)
continues medical treatment or drainage (PTGBD or surgical cholecystostomy) preferable
DELAYED cholecystectomySerious local complications(biliary peritonitis, pericholecystic abscess, liver abscess, GB torsion or emphysematous/ gangrenous/ purulent cholecystitis
EMERGENCY open or laparoscopic depending on experience (along with general supportive care)
Grade III (severe) DELAYED cholecystectomy (2-3 months later after improvement of patient’s general condition) when indicated
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Surgical Management
OPTIMAL APPROACH■ Until 1st half of 1990’s --. Open cholecystectomy was the standard
technique of acute cholecystitis■ Open cholecystectomy with mini-incision is able to produce as good
results as those obtained by laparoscopic procedure although superiority of laparoscopic procedure is now well established
■ TG13 recommends laparoscopic cholecystectomy over open cholecystectomy
■ However, the 1st priority is ALWAYS patient safety
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Surgical Management
OPTIMAL TIMING■ Preferable to perform cholecystectomy soon after admission,
particularly when less than 72 hours have been passed since the onset of symptoms
■ Definition of early surgery within 72-96 h from onset of symptoms (NOT time of diagnosis or admission)
■ Definition of elective (DELAYED) surgery 6 weeks or more after onset
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Surgical Management
OPTIMAL TIME FOR CONVERSION FROM LAPAROSCOPIC TO OPEN CHOLECYSTECTOMY
■ Surgeons should NEVER hesitate to convert to open surgery to prevent injuries when they experience difficulties in performing laparoscopic cholecystectomy i.e. low threshold
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Surgical Management
■ Optimal time for cholecystectomy following PTGBD– Often performed after several days/2 weeks– BUT remains controversial due to lack of any strong evidence(no
RCT)
■ Optimal time for cholecystectomy following endoscopic stone extraction of bile duct in patients with cholecysto-choledocholithiasis in acute cholecystitis– No definitive conclusions could be made due to insufficient
evidence
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Management bundle
■ Bundle = collection of mandatory items or procedures to be performed in clinical practice OR
■ Group of therapies for a disease that, when implemented together, may result in better outcomes than if implemented individually
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Management bundle
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Management bundle
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Management bundle
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Acute Cholecystitis Bundle Checklist
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Available at surgicalpresentations