Cutting out Cholecystectomy on Index Hospitalization Leads to Increased Readmission Rates, Morbidity, Mortality and Cost

Biliary tract diseases that are not adequately treated on index hospitalization are linked to worse outcomes, including high readmission rates. Delays in care for conditions such as choledocholithiasis, gallstone pancreatitis, and cholecystitis often occur due to multiple reasons, and this delay is under-appreciated as a source of morbidity and mortality. Our study is based on the latest Nationwide Readmissions Database review and evaluated the effects of postponing definitive management to a subsequent visit. The study shows a higher 30-day readmission rate in addition to increased mortality rate, intubation rate, vasopressor use in this patient population and significantly added financial burden.

P-BN57 The impact of COVID-19 pandemic on management of patients with acute uncomplicated gallstone pancreatitis

Background Current British Society of Gastroenterology guidelines suggest that patients presenting with acute uncomplicated gallstone pancreatitis should ideally undergo laparoscopic cholecystectomy during the index admission or within two weeks of discharge from hospital. COVID-19 pandemic had a significant impact on the delivery of elective and semi-elective surgical services in the National Health Service (NHS) due to limited availability of theatre resources. The aim of this study was to evaluate compliance with the BSG guidelines during the COVID-19 pandemic and the impact of the newly introduced `Hot’ lists at our centre. Methods Patients admitted with first presentation of acute uncomplicated gallstone pancreatitis between 01/03/19 and 25/02/21 were identified from electronic records. Pregnancy and lack of fitness for surgery were the exclusion criteria. Patients admitted between 01/03/19 and 31/12/19 were defined as the pre-COVID cohort. Those admitted between 23/03/20 and 25/02/21 formed the COVID cohort and had access to urgent gallbladder lists. Baseline characteristics, choice of imaging and timing of laparoscopic cholecystectomy were compared between the two cohorts using STATA software. Continuous variables were compared with Mann Whitney test and categorical variables were compared with Pearson’s Chi-Squared test. Results 53 patients were identified in the total cohort with 27 being hospitalised prior to COVID-19 outbreak and 26 presenting after the national lockdown. Baseline characteristics did not differ significantly between the two groups. Biliary imaging pathway was similar between the two cohorts and importantly there appeared to be no delays in radiological tests during the lockdown. The overall proportion of patients undergoing cholecystectomies remained similar between the two groups and percentage of patients having it during the index admission did not differ. However, patients undergoing cholecystectomy post discharge had a significantly shorter waiting time during the lockdown (p = 0.021) as they were prioritised on the ‘Hot lists’ created to meet the demands of reduced planned theatre service. Conclusions During the 2020 COVID pandemic our service for patients with uncomplicated gallstone pancreatitis continued to be delivered. Despite clinical pressures, there were no notable delays in biliary imaging. The introduction of the urgent operating lists has significantly reduced the time to laparoscopic cholecystectomy following admission for patients with acute uncomplicated gallstone pancreatitis during this period.

P-EGS01 Cholecystectomy after gall stone pancreatitis

Background According to the UK guidelines for the management of acute pancreatitis commissioned by the British Society of Gastroenterology, All patients presenting with gallstone pancreatitis should be considered for cholecystectomy when they are well enough to undergo surgery. In cases of mild biliary pancreatitis, cholecystectomy should ideally be performed during the index admission or within 2 weeks of discharge as interval cholecystectomy is associated with a significant risk of readmission for recurrent biliary events. In cases of severe gallstone pancreatitis, cholecystectomy may need to be delayed until collections have improved, unless the patient is well enough for surgery and the gallbladder is some distance from the collection Methods Methods Inclusion Criteria Exclusion Criteria Results 80 patients were collected during the study period, 96 % of them were classified as mild pancreatitis Cholecystectomy rate Total percentage of cholecystectomies performed for mild gall stone pancreatitis during index admission or within 2 weeks from discharge : 37% Percentage of early cholecystectomies for eligible patients (i.e.after ruling out unfit patients, patients declining treatment, previous cholecystectomy..etc) : 54% Re-admission rate Re-admission rate for early cholecystectomy patients : 7.4% Re-admission rate for delayed cholecystectomy patients : 20.7% Conclusions

P-EGS07 Two years of Acute Biliary Admissions at a tertiary care centre over the Covid-19 pandemic: a closed loop audit with implementation of an acute referral system

Background AUGIS recommends patients diagnosed with acute cholecystitis and gallstone pancreatitis to receive a laparoscopy cholecystectomy on the index admission, ideally within 72 hours of presentation. Early laparoscopic cholecystectomy is associated with better patient outcomes and reduced readmission rates. During the Covid-19 pandemic emergency surgery, if possible was avoided. These patients are referred for an elective cholecystectomy, however waiting times can be lengthy with readmissions common prior to surgery. Methods We performed a closed loop audit on acute biliary admissions to a central London tertiary care centre. We assessed waiting times to laparoscopic cholecystectomy for patients fit for surgery as well as readmissions prior to surgery. The data was collated over a one-year period (01/03/2019 to 29/02/2020), analysed and presented to the senior biliary surgery team. A dedicated e-referral system for patients who did not receive a laparoscopic cholecystectomy on index admission was implemented. Post intervention admissions were re-audited over a second year (01/03/2020- 30/01/2021) and re-analysed to assess the effect of the intervention. Results A total of 111 patients with acute cholecystitis, 52 with gallstone pancreatitis, 34 with biliary colic, 36 with choledocholithiasis and 10 with ascending cholangitis, were included. Prior to implementation of our referral system average waiting time to laparoscopic cholecystectomy was 98.2 weeks, reduced to 47.7 weeks post referral system implementation. Reduction in waiting times resulted in readmission rates reduced by: 23.3% in Choledocholithiasis; 17.4% in Biliary Colic; 16.7% in Ascending Cholangitis; 12.8% in Acute Cholecystitis and 8.3% in Gallstone pancreatitis. Conclusions Admissions with acute biliary colic compose a substantial workload. The COVID-19 pandemic has resulted in a preference for elective versus emergency laparoscopic cholecystectomy. However, delay in surgery results in a readmission burden on emergency surgery departments and worse patient outcomes hence laparoscopic cholecystectomy should be performed as soon as possible following initial admission. This audit demonstrates that a dedicated biliary referral system reduced waiting time which translates to a reduction in admission rates. The importance of this referral system is magnified in the recovery phase of the pandemic where we continue to recover waiting times.

P-EGS27 Outcomes of disorders of the gallbladder, biliary tract, and pancreas during COVID pandemic

Background Biliary disorders make up a significant proportion of the acute general surgical workload. Effective management allows definitive treatment with relief of symptoms and reduced impact to patients due to recurrent admissions and complications. During the first COVID-19 wave and lockdown there were reduced surgical presentations to hospital and patients presented later. Surgical services were forced to implement different practices including more conservative/non operative management potentially increasing the possibility of recurrent presentations and greater complications in biliary-pancreatic presentations. Methods We performed a retrospective audit of patients presenting to our unit with ICD 10 codes: K80;Cholelithiasis, K81;Cholecystitis and K85;Acute pancreatitis. We used the period of the first wave of the COVID pandemic March – August 2020(COVID) and compared this to the same period in 2019(pre-COVID). On note review those with inaccurate coding were excluded. Patient demographics, admission details, investigations, surgical management, operative details, and post-operative complications were recorded. The primary outcomes were change in operative management, representation, and post-operative complications. χ2 test was used to test for significance of categorical variables. Results Conclusions The two groups were demographically similar with equal spread of primary diagnoses however there were significant differences in outcomes. Patients presenting with cholecystitis and gallstone pancreatitis had significantly reduced rates of definitive management. The increase in adverse operative findings is likely secondary to patients presenting later and initial conservative management. The increase in complications for the COVID cohort correlates with the increase in adverse findings/operative complexity. Conservative management with the aim of reducing COVID exposure inadvertently resulted in increased risk to patients with increased presentations/admissions. Despite this risk there were no COVID cases in our cohort.

P-EGS30 Audit of the management of patients presenting with gallstone pancreatitis during the COVID-19 pandemic

Background In the UK around 50% of cases of pancreatitis are caused by gallstones. BSG guidelines recommend ERCP is undertaken within 72h of onset of pain and patients should undergo definitive treatment with cholecystectomy if fit enough during the index admission or within two weeks of discharge to avoid the risk of potentially fatal recurrent pancreatitis. A national audit in 2015 showed that 34.2% of patients receive definitive treatment. During the first COVID-19 wave our surgical service was forced to modify practice including more conservative/non operative management potentially increasing the possibility of recurrent pancreatitis and thus complications. Methods We performed a retrospective audit of patients presenting to our unit with gallstone pancreatitis during the first wave of the COVID-19 pandemic from March to August 2020 (COVID) and compared this to the same period in 2019 (pre-COVID). Patients were filtered from a larger dataset of all admissions with an ICD-10 coding of any biliary disease. Patient demographics, admission details, investigations, surgical management and post-operative complications were recorded. This was then audited against the standards in the BSG guidelines for the management of pancreatitis. Results Conclusions There were significant differences in the management of the groups. Most significantly in the number of hot procedures and number of patients receiving definitive treatment, a consequence of the conservative approach during COVID. Our pre-COVID results are similar to our previous audit in 2016; 76% received definitive treatment. Those that didn’t have definitive treatment were generally due to frailty/co-morbidities. Majority of ERCP delays were due to weekend effect. Of the 40 patients who didn’t receive definitive treatment 16 have represented with biliary flares/pancreatitis in the year following the study period highlighting the importance of definitive treatment.

P-BN13 How has the COVID pandemic affected outcomes in Elective Laparoscopic Cholecystectomy?An observational study in a UK Upper GI Surgical Unit

Background COVID-19 has a significant impact on elective surgery for benign disease. When routine services resumed in April 2021, surgeons were faced with higher number of complicated cases. The aim of this study is to examine the effect of COVID-19 related delays on the outcomes of patients undergoing elective laparoscopic cholecystectomy (LC) in an upper gastrointestinal unit in the UK. Methods Data were collected retrospectively on consecutive patients undergoing elective LC between 1/3/19 to 1/5/19 (Pre-COVID) and 1/4/21 to 11/6/21 (resumption of elective operating following COVID). The indications for surgery, intraoperative details, postoperative complications, length of stay (LoS) and 30- day readmission were compared between the two cohorts. We divided indications for surgery as inflammatory (acute cholecystitis, gallstone pancreatitis, CBD stone with cholangitis) vs non-inflammatory (biliary colic, gallbladder polyps, CBD stone without cholangitis). Data were analysed using the Mann-Whitney U-test and Chi-square or Fisher’s exact test. A p value of < 0.05 was used for statistical significance. Results 159 patients were analysed, 106 in Pre-COVID vs 53 in Post-COVID. Both cohorts had similar age, gender, ASA-grade, BMI. 68 (64.2%) of the pre-COVID cohort were operated for a non-inflammatory pathology compared to 19(35.8%) of the post-COVID cohort (p < 0.001). Less patients had total cholecystectomy (subtotal and failed surgery) in the post-COVID cohort [49(92.5%) vs 159 (100%) p = 0.01]. There was no difference in the operating time, conversion to open surgery, the need for drains, and no difference in the Clavien-Dindo grade complications. Two patients in pre- COVID cohort (1.8%) required re-operation for bile-leak and bowel injury and two in the post COVID cohort (3.7%) for bleeding and CBD-injury. There was no difference in day case discharge or 30-day readmission rate. Conclusions Surgery in the post-COVID cohort was associated with a higher incidence of inflammatory biliary disease, subtotal cholecystectomy and procedure abandoned. Although the numbers in our study are small they highlight the need for enhanced preoperative assessment in elective biliary surgery as the NHS emerges from the acute phase of the pandemic.

P-P05 Acute Pancreatitis during COVID-19 Pandemic: An Overview of Patient Demographics, Disease Severity, Management and Outcomes in Western Health and Social Care Trust

Background Acute pancreatitis is a common disease requiring admissions under surgical and critical care units. The two most common causes are alcohol and gallstones. COVID-19 pandemic had a significant impact on service delivery and patient management throughout all surgical specialties. In this study, primary aim was to ascertain incidence of COVID-19 in acute pancreatitis patients. Secondary objectives were to study aetiology, demographics, severity, 30 day mortality, outcomes and management of acute pancreatitis patients from Altnagelvin Area Hospital from 1st March, 2020 till 30th August, 2020. Methods A retrospective observational review of all patients admitted under General Surgical team from March 2020 till September 2020 was performed. Information regarding demographics, severity of acute pancreatitis (using Glasgow score, Atlanta classification and CT severity index score), ICU admission and organ support, treatment modalities and follow-up data for outcomes was collected based on RedCap tool used by COVID-PAN study. The results were compared to outcomes results of COVID-PAN study for COVID-19 negative patients in that study as we had only one patient who was positive for COVID-19 at time of concomitant pancreatitis diagnosis. Results Forty four (44) patients were admitted with acute pancreatitis. Only one patient (2.3%) was diagnosed with COVID-19 at time of pancreatitis. Aetiology of pancreatitis was found comparable to aetiology reported by large scale studies (2). Mortality was 7% (3 patients). Five patients (11%) needed ICU admission due to organ dysfunction. Three patients (7%) developed ARDS. Conclusions The overall incidence of COVID-19 in pancreatitis in our population of study was low. Therefore, results were compared to patients who were COVID-19 negative in COVID-PAN study. Patients with acute pancreatitis in our target population were mostly elderly, about one in five had moderate to severe or severe pancreatitis and in 16.3% the aetiology could not be identified. As has been observed in other centres globally, urgent for gallstone pancreatitis faced significant delays with no patients being offered index cholecystectomy and only 4 out of 19 patients having undergone interval cholecystectomy.

O-EGS09 Effect of introducing an ambulatory care service on management of patients requiring acute cholecystectomy

Background Biliary pathology is a large tranche of the emergency surgical take, taking up many bed days, with many patients not receiving definitive management on their primary admission. An Emergency Surgical Ambulatory Care (ESAC) service was established at our hospital in 2019, aiming to provide a streamlined platform for diagnosis and surgical management of patients. Most notably this included patients with symptomatic gallstones which could be managed on a semi-urgent basis without hospital admission. We aim to analyse the efficiency of this novel service in hopes of identifying room for improvement so that we may enhance our patient outcomes. Methods Two time periods were retrospectively assessed; September-December 2018 (pre- ESAC) and September-December 2019 (six months after ESAC started). Patients with Cholelithiasis (ICD-K80) and Cholecystitis (ICD-K81) were identified, and those with either an incidental diagnosis of gallstones without symptoms, with gallstone pancreatitis, severe inflammation (empyema, gangrene, perforation), requiring ERCP or if they were unfit for surgery were excluded. Data was collected on number of admissions, length of stay and rate of cholecystectomy. Patients were divided into 2018 SAU, 2019 SAU and 2019 ESAC to compare the difference in their outcomes. Data are presented as median (range). Results Some 57 patients presented acutely in 2018 compared to 82 in 2019. The median wait to operation of 43.5 days in 2018 was significantly reduced to 7 days in 2019. Conclusions The introduction of an ESAC service in 2019 has allowed a reduction in number of admissions, total length of stay of patients and significantly reduced waiting time for surgery. Use of ESAC has shown to be more efficient in terms of hospital bed occupation and indirectly, utilization of resources. The high surgical success rate also ensures fewer patients re-presenting with the same pathology to the acute take and hence contributes to reducing strain on the on-call team. Further work is being done to reduce the number of patients presenting through the SAU pathway, and preferentially attending through ESAC.

P-BN07 Identifying gallstones in acute pancreatitis. Are we undermanaging our patients?

Background Acute pancreatitis (AP) is a common surgical presentation with a wide spectrum of severity and outcome. The most common cause of AP is gallstones, accounting for approximately 50% of cases, followed by alcohol excess. Reliable identification of gallstones is crucial as patients can be offered cholecystectomy to prevent recurrence. Current UK guidelines recommend a minimum of two negative ultrasounds to rule out gallstones. The aim of this study was to assess the pickup rate of gallstones on ultrasound for patients admitted with AP and audit our compliance with UK guidelines. Methods All patients admitted with acute pancreatitis between the start of January 2019 to the end of December 2020 were retrospectively analysed. All patients with a known pre-existing cause for pancreatitis such as alcohol excess, chronic pancreatitis, CBD stricture and pancreatic mass were excluded. Electronic records were examined to identify subsequent imaging investigations and final diagnosis. Particular interest was given to whether gallstones were identified, and adherence to UK guidelines. Results 206 patients were identified following the exclusion criteria. 189 underwent an ultrasound on admission, 111 were positive for gallstones. Of the negative ultrasounds (78), 15 underwent a further USS (4 positive), 29 underwent an MRCP (12 positive), 15 had a CT (3 positive) and 3 had an ERCP (3 positive). This left 16 with an unknown aetiology after 1 ultrasound and did not undergo further imaging and therefore did not comply with the current guidelines. Of the 11 patients who had 2 negative ultrasounds 5 had further imaging and all were negative for gallstones. Conclusions In conclusion Gallstone pancreatitis is a common acute surgical presentation of which morbidity and mortality can be significant. Following our retrospective assessment, we deem secondary imaging in the form of USS or MRCP to be necessary in the investigation of acute pancreatitis due to the high pickup rate. Compliance with current guidelines aids diagnostics and ensures appropriate and timely management of this condition leading to improved patient care.