The role of body mass index class in cholecystectomy after acute cholecystitis: An American College of Surgeons National Surgical Quality Improvement Program analysis

Critical values for body mass index related to morbidity in high-volume low-complexity general surgery: a systematic review and meta-analysis

INTRODUCTION

The aim of this study was to investigate the effect of body mass index (BMI, kg/m2) on outcomes of high-volume low-complexity (HVLC) general surgery procedures and to determine critical values for BMI when selecting patients into HVLC programmes.

METHODS

A systematic review was conducted of studies looking at patients in different BMI categories undergoing HVLC general surgery procedures (laparoscopic cholecystectomy, inguinal hernia repair and umbilical or paraumbilical hernia repair), in accordance with the PRISMA (Preferred Reporting Items for Systematic reviews and Meta-Analyses) guidelines. A comparison meta-analysis model was constructed to compare the outcomes using random-effects modelling. The QUIPS (Quality In Prognosis Studies) tool and GRADE (Grading of Recommendations Assessment, Development and Evaluation) system were used to assess bias.

RESULTS

A total of 26 studies including 486,392 patients were examined. In laparoscopic cholecystectomy, BMI ≥40 was associated with higher conversion to open surgery (odds ratio [OR]: 1.33, p=0.040) but did not affect complications (OR: 0.69, p=0.400) or length of hospital stay (mean difference [MD]: -0.01 days, p=0.900). In inguinal hernia repair, BMI ≥35 was associated with longer operative time (MD: 18.00 minutes, p<0.00001), and higher risk of wound complications (OR: 3.01, p<0.00001) and hospital readmission (OR: 1.46, p=0.0008). In umbilical or paraumbilical hernia repair, BMI ≥30 was associated with higher risk of wound complications (OR: 6.45, p<0.0001) and hospital readmission (OR: 5.56, p<0.00001), and longer operative time (MD: 4.01 minutes, p=0.030).

CONCLUSIONS

Obesity was associated with longer operative time (up to 23 minutes) and higher risk of postoperative morbidity (up to 4-fold) in HVLC procedures. BMI <40 (moderate GRADE certainty - laparoscopic cholecystectomy) and BMI <35 (moderate GRADE certainty - inguinal hernia) appear to represent optimal critical values for perioperative safety metrics.

Early laparoscopic cholecystectomy for acute cholecystitis: should we operate beyond the first week?

BACKGROUND

The deadline for early laparoscopic cholecystectomy (ELC) in patients with acute calculous cholecystitis (ACC) is the subject of much debate. The aim of this study was to assess outcomes of ELC in patients with more than 7 days of symptoms.

METHODS

It is a retrospective analysis of 564 patients having undergone ELC for ACC between January 2003 and June 2021. Patients were divided into two groups according to the timing between the onset of symptoms and surgery: group 1 (G1), within the first 7 days of symptoms, and group 2 (G2) after day 7 of symptoms.

RESULTS

Apart from a longer operative time (G1 80 min vs. G2 90 min; p = 0.016), there were no significant differences regarding conversion rate (G1 14.5% vs. G2 13.2%; p = 0.748), both intra- and postoperative complications, mainly bile duct injuries (G1 0.2% vs. G2 0%; p = 1) and bile leakage (G1 1.2% vs. G2 0%; p = 1) and postoperative length of stay (G1 2 days [1-3] vs. G2 2 days [1-4]; p = 0.125).

CONCLUSION

Early laparoscopic cholecystectomy could be proposed for patients with acute calculous cholecystitis even beyond 7 days of symptoms.

How to Predict Postoperative Complications After Early Laparoscopic Cholecystectomy for Acute Cholecystitis: the Chole-Risk Score

BACKGROUND

Early laparoscopic cholecystectomy (ELC) is the gold standard treatment for patients with acute calculous cholecystitis (ACC); however, it is still related to significant postoperative complications. The aim of this study is to identify factors associated with an increased risk of postoperative complications and develop a preoperative score able to predict them.

METHODS

Multicentric retrospective analysis of 1868 patients with ACC submitted to ELC. Included patients were divided into two groups according to the presentation of increased postoperative complications defined as postoperative complications ≥ Clavien-Dindo IIIa, length of stay greater than 10 days and readmissions within 30 days of discharge. Variables that were independently predictive of increased postoperative complications were combined determining the Chole-Risk Score, which was validated through a correlation analysis.

RESULTS

We included 282 (15.1%) patients with postoperative complications. The multivariate analysis predictors of increased morbidity were previous percutaneous cholecystostomy (OR 2.95, p=0.001), previous abdominal surgery (OR 1.57, p=0.031) and diabetes (OR 1.62, p=0.005); Charlson Comorbidity Index >6 (OR 2.48, p=0.003), increased total bilirubin > 2 mg/dL (OR 1.88, p=0.002), dilated bile duct (OR 1.79, p=0.027), perforated gallbladder (OR 2.62, p<0.001) and severity grade (OR 1.93, p=0.001). The Chole-Risk Score was generated by grouping these variables into four categories, with scores ranging from 0 to 4. It presented a progressive increase in postoperative complications ranging from 5.8% of patients scoring 0 to 47.8% of patients scoring 4 (p<0.001).

CONCLUSION

The Chole-Risk Score represents an intuitive tool capable of predicting postoperative complications in patients with ACC.

Laparoscopic cholecystectomy for acute cholecystitis: is the surgery still safe beyond the 7-day barrier? A multicentric observational study

Timing for early laparoscopic cholecystectomy (ELC) in patients with acute calculous cholecystitis (ACC) is still controversial. This study assesses ELC for ACC with delayed presentation, according to hospital volume. Multicentric retrospective analysis of 1868 ELC. Patients were classified into two groups according to the timing of surgery from clinical onset and centre volume. Group 1 (G1) within the first 7 days, group 2 (G2) beyond that. Then centres were classified in low volume centres (LVC) and higher volume centres (HVC) according to the number of ELC performed per year. Overall, G2 showed increased conversion rate (17.7% vs 10.7%; p = 0.004), intraoperative complications (7.3% vs 2.9%; p = 0.001); postoperative haemorrhage (3.6% vs 0.8%; p < 0.001), infections (16.6% vs 9.3%; p = 0.003) and global complications (27.6% vs 19.8%; p = 0.011). HVC in comparison with LVC presented decreased conversion rate (17.1% vs 7.6%; p < 0.001), intraoperative bleeding (2.1% vs 1%; p = 0.047), postoperative bile leakage (4.1% vs 2.1%; p = 0.011), infectious (13.7% vs 7.5%; p < 0.001) and global complications (25.7% vs 17.1%; p < 0.001). HVC did not show an increase in any of the above-mentioned outcomes when G1 and G2 were compared. ELC must be indicated cautiously in patients with ACC and more than 1 week of symptom duration. It should be performed in centres with sufficient experience in the management of this disease.

Robotic Subtotal Cholecystectomy in a Geriatric Acute Care Surgery Patient with Super Obesity

Introduction. Unique challenges exist with conventional laparoscopic operations in patients with super obesity (BMI > 50). Limited literature is available regarding use of the robotic platform to treat patients with super obesity or acute care surgery patients. This case describes an interval robotic subtotal cholecystectomy in an elderly patient with super obesity and multiple comorbidities. Case Description. A 74-year-old male with a BMI of 59.9 developed acute cholecystitis. He was deemed excessively high risk for operative intervention due to concurrent comorbid conditions and underwent percutaneous cholecystostomy. After a few months, a cholangiogram demonstrated persistent cystic duct occlusion. The patient expressed interest in tube removal and elective interval cholecystectomy. After preoperative risk stratification and optimization, he underwent a robotic subtotal cholecystectomy with near infrared fluorescence cholangiography. The patient was discharged on postoperative day one and recovered without complications. Discussion. Obesity is a risk factor for acute cholecystitis, which is most commonly treated with conventional laparoscopy (CL). CL is technically restraining and difficult to perform in patients with super obesity. The body habitus of patients with super obesity can impair proper instrumentation and increase perioperative morbidity. In this case, robotic assisted cholecystectomy console improved surgeon ergonomics and provided support for proper instrumentation. Robotic, minimally invasive cholecystectomy approaches may reduce perioperative morbidity in patients with super obesity. Further studies are necessary to address the role of robotic surgery in acute care surgery patients with super obesity.

The obesity paradox: Underweight patients are at the greatest risk of mortality after cholecystectomy

BACKGROUND

Elevated body mass index is a risk factor for gallstone disease and cholecystectomy, but outcomes for low body mass index patients remain uncharacterized. We examined the association of body mass index with morbidity, mortality, and resource use after cholecystectomy.

METHODS

The 2005 to 2016 American College of Surgeons National Surgical Quality Improvement Program was retrospectively analyzed for adult patients undergoing laparoscopic and open cholecystectomy. Patients were stratified into 5 groups: body mass index <18.5 (underweight), body mass index 18.5 to 24.9 (normal weight), body mass index 25 to 29.9 (overweight), body mass index 30 to 34.9 (class I obesity), body mass index 35 to 39.9 (class II obesity), and body mass index ≥40 (class III obesity). Multivariable regressions identified independent associations of covariates with 30-day mortality, complications, and resource use.

RESULTS

Of 327,473 cholecystectomy patients, 1.0% were underweight, 19.5% normal weight, 30.3% overweight, 24.0% class I obesity, 13.5% class II obesity, and 11.7% class III obesity. After multivariable analysis, underweight patients had a higher risk of mortality (adjusted odds ratio = 1.53; P = .029) and postoperative bleeding (adjusted odds ratio = 1.45; P = .011) relative to normal weight patients. Conversely, class III obesity patients had lower mortality (adjusted odds ratio = 0.66; P = .005) but increased operative time (β = 10.2 minutes; P < .001), wound infection (adjusted odds ratio = 1.38; P < .001), and wound dehiscence (adjusted odds ratio = 2.20; P < .001). Hospital duration of stay and readmission rates were highest for underweight patients.

CONCLUSION

Underweight patients experience increased risk of mortality and readmission, while class III obesity patients have higher rates of wound infection and dehiscence as well as prolonged operative time. These findings may guide choice of intervention.

Obesity is not a risk factor for either mortality or complications after laparoscopic cholecystectomy for cholecystitis

Obesity is a positive predictor of surgical morbidity. There are few reports of laparoscopic cholecystectomy (LC) outcomes in obese patients. This study aimed to clarify this relationship. This retrospective study included patients who underwent LC at Showa University Northern Yokohama Hospital between January 2017 and April 2020. A total of 563 cases were examined and divided into two groups: obese (n = 142) (BMI ≥ 25 kg/m²) and non-obese (n = 241) (BMI < 25 kg/m²). The non-obese group had more female patients (54%), whereas the obese group had more male patients (59.1%). The obese group was younger (56.6 years). Preoperative laboratory data of liver function were within the normal range. The obese group had a significantly higher white blood cell (WBC) count (6420/μL), although this was within normal range. Operative time was significantly longer in the obese group (p = 0.0001). However, blood loss and conversion rate were not significantly different among the groups, neither were surgical outcomes, including postoperative hospital stay and complications. Male sex and previous abdominal surgery were risk factors for conversion, and only advanced age (≥ 79 years) was an independent predictor of postoperative complications as observed in the multivariate analysis. Although the operation time was prolonged in obese patients, operative factors and outcomes were not. Therefore, LC could be safely performed in obese patients with similar efficacy as in non-obese patients.

Laparoscopic Cholecystectomy for Acute Cholecystitis: Is the Surgery Still Safe beyond the 7-Day Barrier?

BACKGROUND

The optimal timing for early laparoscopic cholecystectomy (ELC) in patients with acute calculous cholecystitis (ACC) is still controversial. The aim of this study was to assess the outcomes of ELC in patients with delayed presentation.

METHODS

Retrospective analysis of 381 patients who underwent ELC for ACC between January 2010 and September 2018. Included patients were classified into two groups according to the timing of surgery from the onset of symptoms: group 1 (G1) within the first 7 days and group 2 (G2) beyond 7 days.

RESULTS

There were no significant differences regarding conversion rate (G1 8.6% vs. G2 11.8%; p = 0.527), operative time (G1 100 min [75-120] vs. G2 120 min [71-150]; p = 0.060), bile duct injuries (G1 0.3% vs. G2 0%; p = 1), major postoperative complications (G1 11% vs. G2 5.9%; p = 0.557), reoperation rates (G1 1.4% vs. G2 0%; p = 1), length of stay (G1 4 days [3-7] vs. G2 5 days [3-7]; p = 0.539), readmissions (G1 3.7% vs. G2 5.9%; p = 0.633) and costs (G1 6035 € [3693-8330] vs. G2 7243 € [4921-11,336]; p = 0.395).

CONCLUSION

ELC may be considered for patients with ACC who can tolerate surgery with more than 1 week of symptom duration.

Prophylactic Cholecystectomy at Time of Surgery for Small Bowel Neuroendocrine Tumor Does Not Increase Postoperative Morbidity

BACKGROUND

Prophylactic cholecystectomy at time of surgery for small bowel neuroendocrine tumor (SBNET) has been advocated, as these patients often go on to require somatostatin analogue therapy, which is known to increase risk of cholestasis and associated complications. Little is known regarding patterns of adoption of this practice or its associated morbidity.

METHODS

The American College of Surgeons National Surgical Quality Improvement Program database (2008-2014) was queried to identify patients who underwent SBNET resection. The risk differences of morbidity and mortality associated with performance of concurrent cholecystectomy were determined with multivariable adjustment for confounders.

RESULTS

Among 1300 patients who underwent SBNET resection, 144 (11.1%) underwent concurrent cholecystectomy. Median age of patients undergoing cholecystectomy was 62 years [interquartile range (IQR) 52-69 years], and 75 were male. They more commonly had disseminated cancer (36.1 vs. 11.6%, p < 0.001) or SBNET located in duodenum (10.4 vs. 4.9%, p = 0.045) without difference in other baseline characteristics. Operative time was significantly longer in the cholecystectomy group (median 172 vs. 123 min, p < 0.001). Rate of postoperative morbidity was not significantly different between cholecystectomy and no-cholecystectomy groups (11.8 vs. 11.1%, p = 0.79). After adjustment for confounding, the risk difference of morbidity attributable to cholecystectomy was + 0.4% [95% confidence interval (CI) - 4.9 to + 5.6%]. Mortality within 30 days was not significantly different between cholecystectomy and no-cholecystectomy groups (1.4 vs. 0.6%, p = 0.29).

CONCLUSIONS

Concurrent cholecystectomy at time of resection of SBNET is not associated with higher morbidity or mortality yet is performed in a minority of patients. Prospective study can identify which patients may derive benefit from this approach.

A Single Centre Experience of Day Case Laparoscopic Cholecystectomy Outcomes by Body Mass Index Group

AIM

The purpose of this study was to evaluate whether patients with a high BMI can undergo safe day case LC for cholecystitis compared to groups of patients with a lower BMI.

SETTING

NHS District General Hospital, UK.

METHODS

A retrospective review of 2391 patients who underwent an attempted day case LC between 1 January 2009 and 15 August 2015 was performed. Patients were divided into five groups depending on their BMI. Inclusion criteria were patients undergoing elective day case laparoscopic cholecystectomy with cholecystitis on histology. The endpoints were complication requiring readmission and postoperative length of stay (LOS).

RESULTS

There were 2391 LCs performed in the time period of which 1646 were eligible for inclusion. These LCs were classified as 273 (16.9%), 608 (37.8%), 428 (26.6%), 208 (12.9%), and 91 (5.66%) patients in the groups with BMI values of 18.5-24.9, 25-29.9, 30-34.9, 35-39.9, and >40, respectively. Average BMI was 30.0 (±5.53, 19-51) with an average postoperative LOS of 0.86, and there was no difference between the BMI groups. Overall complication rate was 4.3%; there was no significance between BMI groups.

CONCLUSIONS

Increased BMI was not associated with worse outcomes after day case LC.