The optimal treatment of patients with mild and moderate acute cholecystitis: time for a revision of the Tokyo Guidelines

Bridging the Gap: Comparison of Outpatient Clinic and Emergency Department Patients Undergoing Cholecystectomy

INTRODUCTION

Literature shows failure of the outpatient clinic (OC) pathway after emergency department (ED) ultrasound diagnosis of symptomatic cholelithiasis (SC). We hypothesized SC to be more prevalent on final surgical pathology (FSP) in patients who successfully completed OC pathway.

METHODS

This retrospective single-institution chart review compared OC and ED patients with right upper quadrant (RUQ) pain and cholelithiasis whom underwent cholecystectomy. Clinical evaluation was considered positive if RUQ pain >4 h, or + Murphy's sign. Ultrasound was positive if two of these three were present: sonographic Murphy's, wall thickness > 4 mm, or pericholecystic fluid. Results were compared with FSP.

RESULTS

Six hundred-seven patients underwent cholecystectomy, 299 OC and 308 ED. OC was more likely to SC (23% versus 4.6%) (P < 0.0001) and ED acute cholecystitis (39.3% versus 4.7%). Chronic cholecystitis was the most common FSP in both OC (72%) and ED (56%) populations, of these, 73% of OC denied pain >4 h versus only 10% of ED (P < 0.001). Median time from evaluation to cholecystectomy was 14 d versus 14 h in the OC and ED respectively (P < 0.0001).

CONCLUSIONS

While chronic cholecystitis was the most common FSP in both OC and ED, the majority of OC reported RUQ pain <4 h delineating these presentations. Duration of pain should be utilized as algorithm triage. We recommend patients with pain episode <4 h should complete OC algorithm with expedited cholecystectomy within 14 d.

Percutaneous Transhepatic Gallbladder Drainage Combined with Laparoscopic Cholecystectomy Versus Emergency Laparoscopic Cholecystectomy for the Treatment of Moderate Acute Cholecystitis: A Meta-Analysis

Background: We compared the clinical outcomes of laparoscopic cholecystectomy (LC) after percutaneous transhepatic gallbladder drainage (PTGBD) with those of emergency LC (ELC) in patients with moderate acute cholecystitis (AC) as per the Tokyo Guidelines. Methods: A meta-analysis of clinical comparative studies investigating the efficacy of PTGBD combined with LC (PTGBD + LC) versus ELC for moderate AC patients was performed. Results: The PTGBD + LC group had a shorter operative time (mean difference [MD] = -25.02 minutes; 95% confidence interval [95% CI] -35.50 to -14.54; P < .00001), less intraoperative bleeding (MD = -33.38 mL; 95% CI -45.43 to -21.33; P < .00001), shorter postoperative hospital stay (MD = -2.37 days; 95% CI -3.30 to -1.44; P < .00001), lower conversion rate (odds ratio [OR] 0.23; 95% CI 0.11-0.48; P < .0001), and lower total postoperative morbidity (OR 0.26; 95% CI, 0.10-0.67; P = .005) compared with the ELC group. There was no significant difference in total hospital stay (MD = 1.71 days; 95% CI -0.17 to 3.60; P = .08) and the incidence of bile leak (OR 0.30; 95% CI 0.07-1.29; P = .11). Conclusions: Compared with ELC, LC after PTGBD can effectively reduce the difficulty of operation, total postoperative morbidity, and conversion rate, and shorten the postoperative hospital stay and operative duration in patients with moderate AC as per the Tokyo Guidelines. In clinical practice, it is necessary to formulate individualized treatment plans based on the condition and willingness of the patients.

Challenging situations in cholecystectomy and strategies to overcome them

Background

Cholecystectomy may be difficult and hazardous, causing major morbidity and mortality. This review aims to identify situations increasing the probability of difficult gallbladders and present today’s best practice to overcome them.

Methods

Review of the literature and expert comment.

Results

One in six gallbladders is expected to be a difficult cholecystectomy. The majority can be predicted by patient history, clinical symptoms, and pre-existing comorbidities. Acute cholecystitis, mild biliary pancreatitis, prior endoscopic sphincterotomy, and liver cirrhosis are the predominant underlying diseases. Early or delayed cholecystectomy, percutaneous cholecystostomy, and pure conservative treatment are evidence-based options. Early laparoscopic cholecystectomy is of advantage in patients fit for surgery, with subtotal cholecystectomy or conversion to open surgery as bail-out strategies. The choice of the procedure depends on the experience of the surgeon.

Conclusion

Clinical decisions should follow a pathway based on patients’ risk, favoring laparoscopic cholecystectomy whenever possible. The implementation of an institutional pathway to deal with difficult gallbladders is recommended.

Evaluating the advantages of treating acute cholecystitis by following the Tokyo Guidelines 2018 (TG18): a study emphasizing clinical outcomes and medical expenditures

BACKGROUND

Acute cholecystitis (AC) is a common surgical emergency. The Tokyo Guidelines 2018 (TG18) provides a reliable algorithm for the treatment of AC patients to achieve optimal outcomes. However, the economic benefits have not been validated. We hypothesize that good outcomes and cost savings can both be achieved if patients are treated according to the TG18.

METHOD

This retrospective study included 275 patients who underwent cholecystectomy in a 15-month span. Patients were divided into three groups (group 1: mild AC; group 2: moderate AC with American Society of Anesthesiologists (ASA) physical status class ≤ 2 and Charlson Comorbidity Index (CCI) score ≤ 5; and group 3: moderate AC with ASA class ≥ 3, CCI score ≥ 6, or severe AC). Each group was further divided into two subgroups according to management (followed or deviated from the TG18). Patient demographics, clinical outcomes, and hospital costs were compared.

RESULTS

For group 1 patients, 77 (81%) were treated according to the TG18 and had a significantly higher successful laparoscopic cholecystectomy (LC) rate (100%), lower hospital cost ($1896 vs $2388), and shorter hospital stay (2.9 vs 8 days) than those whose treatment deviated from the TG18. For group 2 patients, 50 (67%) were treated according to the TG18 and had a significantly lower hospital cost ($1926 vs $2856), shorter hospital stay (3.9 vs 9.9 days), and lower complication rate (0% vs 12.5%). For group 3 patients, 62 (58%) were treated according to the TG18 and had a significantly lower intensive care unit (ICU) admission rate (9.7% vs 25%), but a longer hospital stay (12.6 vs 7.8 days). However, their hospital costs were similar. Early LC in group 3 patients did not have economic benefits over gallbladder drainage and delayed LC.

CONCLUSION

The TG18 are the state-of-the-art guidelines for the treatment of AC, achieving both satisfactory outcomes and cost-effectiveness.

Risk Prediction in Acute Calculous Cholecystitis: A Systematic Review and Meta-Analysis of Prognostic Factors and Predictive Models

Background: Laparoscopic cholecystectomy is the main treatment of acute cholecystitis. Although considered relatively safe, it carries 6%-9% risk of major complications and 0.1%-1% risk of mortality. There is no consensus regarding the evaluation of the preoperative risks, and the management of patients with acute cholecystitis is usually guided by surgeon's personal preferences. We assessed the best method to identify patients with acute cholecystitis who are at high risk of complications and mortality. Methods: We performed a systematic review of studies that reported the preoperative prediction of outcomes in people with acute cholecystitis. We searched the Cochrane Library, MEDLINE, EMBASE, WHO ICTRP, ClinicalTrials.gov, and Science Citation Index Expanded until April 27, 2019. We performed a meta-analysis when possible. Results: Six thousand eight hundred twenty-seven people were included in one or more analyses in 12 studies. Tokyo guidelines 2013 (TG13) predicted mortality (two studies; Grade 3 versus Grade 1: odds ratio [OR] 5.08, 95% confidence interval [CI] 2.79-9.26). Gender predicted conversion to open cholecystectomy (two studies; OR 1.59, 95% CI 1.06-2.39). None of the factors reported in at least two studies had significant predictive ability of major or minor complications. Conclusion: There is significant uncertainty in the ability of prognostic factors and risk prediction models in predicting outcomes in people with acute calculous cholecystitis. Based on studies of high risk of bias, TG13 Grade 3 severity may be associated with greater mortality than Grade 1. Early referral of such patients to high-volume specialist centers should be considered. Further well-designed prospective studies are necessary.

Bacteria and fungi in acute cholecystitis. A prospective study comparing next generation sequencing to culture

OBJECTIVES

Guidelines for antibiotic treatment of acute cholecystitis are based on studies using culture techniques for microbial identification. Microbial culture has well described limitations and more comprehensive data on the microbial spectrum may support adjustments of these recommendations. We used next generation sequencing to conduct a thorough microbiological characterization of bile-samples from patients with moderate and severe acute cholecystitis.

METHODS

We prospectively included patients with moderate and severe acute cholecystitis, undergoing percutaneous or perioperative drainage of the gall bladder. Bile samples were analyzed using both culture and deep sequencing of bacterial 16S rRNA and rpoB genes and the fungal ITS2-segment. Clinical details were evaluated by medical record review.

RESULTS

Thirty-six patients with moderate and severe acute cholecystitis were included. Bile from 31 (86%) of these contained bacteria (29) and/or fungi (5) as determined by sequencing. Culture identified only 40 (38%) of the 106 microbes identified by sequencing. In none of the 15 polymicrobial samples did culture detect all present microbes. Frequently identified bacteria often missed by culture included oral streptococci, anaerobic bacteria, enterococci and Enterobacteriaceae other than Klebsiella spp. and Escherichia coli.

CONCLUSIONS

Culture techniques display decreased sensitivity for the microbial diagnostics of acute cholecystitis leaving possible pathogens undetected.

GI Surgical Emergencies: Scope and Burden of Disease

Nearly 3 million patients are hospitalized every year for emergent gastrointestinal (GI) surgical problems and nearly one third of those will require surgery. This article reviews the scope of GI surgical emergencies within the context of emergency general surgery (EGS), costs of care, overview of several common GI surgical problems, and traditional and emerging treatment modalities. This article also argues for ongoing work in the area of risk assessment for EGS, and describes quality metrics as well as outcomes of care for these patients.

Validation of a new American Association for the Surgery of Trauma (AAST) anatomic severity grading system for acute cholecystitis

BACKGROUND

The American Association for the Surgery of Trauma (AAST) established anatomic grading to facilitate risk stratification and risk-adjusted outcomes in emergency general surgery. Cholecystitis severity was graded based on clinical, imaging, operative, and pathologic criteria. We aimed to validate the AAST anatomic grading system for acute cholecystitis.

METHODS

This is a retrospective cohort study including consecutive patients admitted with acute cholecystitis at an urban, tertiary medical center between 2013 and 2016. Grade 1 is acute cholecystitis, Grade 2 is gangrenous or emphysematous cholecystitis, Grade 3 is localized perforation, and Grades 4 and 5 have regional and systemic peritonitis, respectively. Concordance between the AAST grade and outcome including mortality, length of stay (LOS), ICU use, readmission, and complications were assessed using logistic regression.

RESULTS

A total of 315 patients were included. There was very good inter-rater (two independent raters) reliability for anatomic grading, κ = 1.00, p < 0.005. The majority of patients were Grade 1 or Grade 2 (94%). Incidence of complications, LOS, ICU use, and any adverse event increased with increasing anatomic grade. When compared to Grade 1 disease, patients with Grade 2 were more likely to undergo cholecystectomy (OR 4.07 [1.93-8.56]). Grade 3 patients were at higher risk of adverse events (OR 3.83 [1.34-10.94]), longer LOS (OR 1.73 [1.03-2.92]), and ICU use (OR 8.07 [2.43-26.80]).

CONCLUSIONS

AAST severity scores were independently associated with clinical outcomes in patients with acute cholecystitis. Despite low-grade disease, complications were common, and therefore a refinement of the scoring system may be necessary for more granular prediction.

LEVEL OF EVIDENCE

Epidemiologic/prognostic, level III.

Validation of the AAST EGS acute cholecystitis grade and comparison with the Tokyo guidelines

BACKGROUND

Acute cholecystitis presents with heterogeneous severity. The Tokyo Guidelines 2013 is a validated method to assess cholecystitis severity, but the variables are multifactorial. The American Association for the Surgery of Trauma (AAST) developed an anatomically based severity grading system for surgical diseases, including cholecystitis. Because the Tokyo Guidelines represent the gold standard to estimate acute cholecystitis severity, we wished to validate the AAST emergency general surgery scoring system and compare the performance of both systems for several patient outcomes.

METHODS

Adults (≥18 years) with acute cholecystitis during 2013-2016 were identified. Baseline demographic characteristics, comorbidity severity as defined by Charlson Comorbidity Index score, procedure types, and AAST and Tokyo Guidelines 2013 grades were abstracted. Outcomes included duration of stay, 30-day mortality, and complications. Comparison of the Tokyo Guidelines and AAST grading system was performed using receiver operating characteristic (AUROC) curve C statistics.

RESULTS

There were 443 patients, with a mean (±standard deviation) age of 64.8 (±18) years, 59% male. The median (interquartile ratio) Charlson Comorbidity score was 3 (0-6). Management included laparoscopic (n = 307, 69.3%), open (n = 26, 6%), laparoscopy converted to laparotomy (n = 53, 12%), and cholecystostomy (n = 57, 12.7%). Comparison of AAST with Tokyo Guidelines AUROC C statistics indicated (P < .05) mortality (0.86 vs 0.73), complication (0.76 vs 0.63), and cholecystostomy tube utilization (0.80 vs 0.68).

CONCLUSION

Emergency general surgery grading systems improve disease severity assessment, may improve documentation, and guide management. Discrimination of disease severity using the AAST grading system outperforms the Tokyo Guidelines for key clinical outcomes. The AAST grading system requires prospective validation and further comparison.

Validation of TG13 severity grading in acute cholecystitis: Japan-Taiwan collaborative study for acute cholecystitis

BACKGROUND

The collaborative multicenter retrospective study of acute cholecystitis (AC) was performed in Japan and Taiwan. The aim for this study was evaluation of the clinical value of TG13 severity grading for AC.

METHOD

The study was designed as an international multicenter retrospective study of AC from 2011 to 2013. Based on the data, we investigated the TG13 severity grading by analyzing the correlations between grade and prognosis, surgical procedures, histopathology, and organ dysfunction and prognosis.

RESULTS

An investigation revealed that 30-day overall mortality rate was 1.1% for Grade I, 0.8% for Grade II, 5.4% for Grade III. The mortality rate for Grade III was significantly higher than lower grades (P < 0.001). The greater the number of organ dysfunction, the higher the mortality rate (P < 0.001). However, the mortality rate varied depending on the number of organ dysfunction (3.1-25%). With respect to the surgical procedures, laparoscopic cholecystectomy was performed for Grade I patients (P < 0.001), and the higher the grade, the more likely open surgery would be selected (P < 0.001).

CONCLUSION

TG13 severity grading criteria for AC are providing great benefits in actual clinical settings. From this study, the position of each severity grade was obviously confirmed.