Conference Papers
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This collection contains abstracts of conference papers, presented at local and international conferences by the staff of the Faculty of Medicine
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Item Role of interventional radiology in paediatric liver transplantation(Sri Lanka Medical Association, 2023) Fernando, M.; Gunetilleke, B.; Tillakaratne, S.; Siriwardana, R.C.; Appuhamy, W.N.D.P.C.; Padmasiri, U.G.M.INTRODUCTION: Interventional radiology advances have rendered it attainable to treat many of the complications of liver disease in a minimally invasive manner, and they play a major role in liver transplantation. OBJECTIVES: We aimed to assess the role of interventional radiology in a cohort of paediatric liver transplant patients. METHODS: Thirteen paediatric patients underwent liver transplantations from July 2020–February 2023 at Colombo-North Teaching Hospital, Ragama. Seven patients (53.84%) required special interventional radiological procedures. The need for an interventional radiological procedure was decided by a multidisciplinary team. A retrospective database was maintained with demographic and liver transplant data. RESULTS: Four patients (57.14%) requiring radiological intervention underwent procedures involving the thoracic cavity, and 5 patients (71.42%) who required radiological intervention underwent procedures involving the abdominal cavity. Two patients (28.57%) out of the seven who had interventional radiological procedures went through both abdominal and thoracic radiological interventions. As abdominal radiological interventions, splenic artery embolization (20%), hepatic venous stenting (20%), subhepatic drain placement (20%), and two abdominal pigtail drain insertions (40%) have been done. Four patients underwent pigtail insertion, which was performed as a thoracic radiological intervention. CONCLUSIONS: Interventional radiology plays a crucial role in the management of paediatric post-liver transplantation patientsItem A prospective study on drain fluid amylase as an indicator of clinical outcome in patients undergoing Whipple surgery(Sri Lanka Medical Association, 2023) Gishanthan, S.; Tillakaratne, S.; Bulathsinhala, B.S.K.; Uragoda, B.; Siriwardana, R.C.INTRODUCTION: Post-Whipple pancreatic fistula is defined as having a high drain fluid amylase (DFA) (>3 times of normal value). In our observation, DFA levels did not influence the clinical outcome. OBJECTIVES: To determine the drain fluid amylase levels on the outcome of patients METHODS: 48 patients who underwent the Whipple procedure from May 2015 to September 2019 were included. Serum amylase and DFA levels were assessed on days 1,3 and 5. Amylase levels were compared with the patient’s outcome and the nature of the pancreas. RESULTS: 20 patients had DFA over three times on day 1. Their median hospital stay (HS) and ICU stay did not differ from others (HS 8 vs. 9 days, p=0.545; ICU stay 3 vs. 3 p=0.95). On day three 15 patients had DFA rise and their hospital stay (HS) and ICU were comparable. (HS 8 vs. 9 days (p=0.083), ICU stay 3 vs 3 p=0.26). On day five 5 patients had DFA over three times and their median hospital stay (HS) and ICU stay were similar. Nature of the pancreas also did not correlate significantly with DFA more than 3 times. Although patients with DFA more than 3 times of normal value on day 1,3, and 5 had smaller duct diameter (D1 2.78mm vs 4.25mm p=0.86; D3 2.08mm vs 4.42mm p=0.165; D5 4.10mm vs 1.86mm p=0.44) non was statistically significant. CONCLUSIONS: DFA > 3 times on Day1,3 and 5 did not significantly alter the outcome of patients.Item Hepatocellular carcinoma in Sri Lanka: Where do we stand?(Sri Lanka Medical Association, 2013) Siriwardana, R.C.; Liyanage, C.A.H.L.; Jayatunge, D.S.P.; Dassanayaka, A.; Gunetileke, M.G.; Niriella, M.A.; Sirigampola, C.; Upasena, A.; de Silva, H.J.INTRODUCTION AND OBJECTIVES:Hepato-cellular carcinoma (HCC) is the sixth commonest cancer worldwide. We studied 105 consecutive patients with HCC in a single tertiary care centre. METHODS: North Colombo Liver Unit maintains a prospective database of HCC since September 2011. There were 105 entries by February 2013. Decision on the best form of treatment was taken at a multidisciplinary meeting. RESULTS: The median age at presentation was 63 years (range 12-79). Patients were predominantly male 93 (87%). Alcohol consumption above the safe limit was reported in 47 (45%). Hepatitis B surface antigen or C antibody was not detected in any of the patients. Background liver cirrhosis was evident in 59 (79%). Forty two (46%) patients had single nodular tumours while in 20 (21%) it was diffusely infiltrating. Portal vein invasion was seen in 22 (20 %). Median alpha-feto protein (AFP) level was 57.25 mg/ml (1.16- 94120 ng/ml; n=72). Twenty four (33%) patients had AFP level > 400u/l. Surgery was performed in 20 (19%), liver transplant in 2 (1.9%), radio frequency ablation or alcohol ablation in 8 (7.6%), trans arterial chemo embolization (TACE) in 44 (41.9%) and sorafmib was prescribed in four patients. Overall mean survival was 15 months. In the ‘no treatment’ group, mean survival was 4 months. Surgery group had a mean survival of 20 months. CONCLUSION: Hepatitis B is not a risk factor for HCC in Sri Lankans. Median survival without treatment is 4 months.Item Local infiltration versus Laparoscopic e guided transverse abdominis plane block in laparoscopic cholecystectomy e double blinded randomized control trial(Elsevier, 2018) Siriwardana, R.C.; Kumarage, S.K.; Gunetilleke, M.B.; Thilakarathne, S.B.BACKGROUND: Transverse abdominal plane block (TAP) is a new technique of regional block described to reduce postoperative pain in laparoscopic cholecystectomy (LC). Recent reports describe an easy technique to deliver local anesthetic agent under laparoscopic guidance. METHODS: This randomized control trial was designed to compare the effectiveness of additional laparoscopic guided TAP block against the standard full thickness port site infiltration. 45 patients were randomized in to each arm after excluding emergency LC, conversions, ones with coagulopathy, pregnancy and allergy to local anesthetics. All cases were four ports LC. Interventions - Both groups received standard port site infiltration with 3-5ml of 0.25% bupivacaine. The test group received additional laparoscopic guided TAP block with 20ml of 0.25% bupivacaine subcostaly, between the anterior axillary and mid clavicular lines. As outcome measures the pain score, opioid requirement, episodes of nausea and vomiting and time to mobilize was measured at 6 hourly intervals. RESULTS: The two groups were comparable in the age, gender, body mass index, indication for cholecystectomy difficulty index and surgery duration. The pain score at six hours (P = 0.043) and opioid requirement at six hours (P =0.026) was higher in the TAP group. These were similar in subsequent assessments. Other secondary outcomes were similar in the two groups. CONCLUSION: Laparoscopic-guided transverses abdominis plane block does not give an additional pain relief or other favorable outcomes. It can worsen the pain scoresItem Hilar cholangiocarcionoma; Is aggressively answered(College of Surgeons of Sri Lanka, 2015) Bandara, L.M.P.M.; Jayarathne, V.S.; Siriwardana, R.C.; Nawarathna, N.M.M.; Liyanage, C.A.H.INTRODUCTION: Cholangiocarcinoma (CCA) is a malignant disease involving the billiary system with majority occurring in the hilar region. CCA demands prompt management because of its aggressive nature. MATERIALS AND METHODS: Patients who presented to Gastroenterology and hepatobiliary unit at NHSL and the Professorial Surgical Unit of NCTH from January 2011 to June 2015 were included in this study. Diagnosis was made by CT imaging, MRCP and ERCP. RESULTS: Total of 120 patients were diagnosed with CCA. The median age of presentation was 64 years (31-85) with 51.2% being males. Majority of 63 patients (52.1%) of CCA occurred in the hilar region with rest involving the common bile duct. Out of 63 hilar CCA 44 were classified according to the bismuth classification. 13/44 were type I, 7/44 were type II, 9/44 were of type III and 15/44 were of type IV. While 5 patients (7.9%) underwent hepatic resection, Majority of 40 patients (63.5 %) were stented with 9 (14.2%) being treated with Radiofrequency ablation (RFA). Survival was significant following surgery (P=0.027). Four patients who underwent surgery are currently followed up at NCTH. CONCLUSIONS: Surgery appears to be the effective treatment for CCA. Aggressive palliation with stenting seems beneficial.Item Bile reflux and quality of life after modified retrocolic posterior gastric gastrojejunostomy in whipple procedure(College of Surgeons of Sri Lanka, 2015) Rajapaksha, R.W.M.A.L.; Liyanage, C.A.H.; Hewavisenthi, S.J.D.S.; Liyanage, S.K.; Bandara, L.M.P.M.; Siriwardana, R.C.INTRODUCTION: Perioperative outcome of Whipple surgery has greatly improved. Quality of life has become an important issue in long-term survivors. Delayed gastric emptying and bile reflux are common concerns. Modified retrocolic posterior gastric gastrojejunostomy with mesocolic stich has been unit's standard practice. Study was designed to assess macro and microscopic bile reflux and dyspepsia related quality of life in long-term survivors. MATERIAL AND METHODS: Out of 42 patients operated from June 2012, twenty long-term survivors were selected after excluding once with recurrence and ones who had chemotherapy during last six months. All underwent gastroscopy. Macroscopic bile reflux was grouped in to four categories. Six gastric biopsies were taken from standard sites. Microscopic bile reflux index (BRI) was calculated in stained specimens. BRI score of more than 14 was considered significant. Validated Nepean dyspepsia index-short form (NDI-SF) was used to assess the severity of dyspepsia related quality of life and compared with age and gender matched control. RESULTS: The median age was 48.5 years (21- 69). Median survival of the group was 37 months (6-40). Endoscopically, 18/20 (90%) had macroscopic bile reflux (83.3% yellowish bile lake, 16.7% greenish bile lakes). None had stomal ulcers or macroscopic inflammation. Mean Bile reflux index score was 13.22 (SD: 9.46). Mean dyspepsia score of Whipple group was 23.1 (SD 8.88). In controls, mean dyspepsia score was 20 (SD 8.2), showing no significant difference (p =0.245). CONCLUSION: Though there was macroscopic bile reflux, clinical symptoms and microscopic changes were minimal. Modified technique had good long-term results.Item Factors affecting Post- Embolization fever and liver failure after Trans- Arterial Chemo-Embolization in a cohort without background infective hepatitis- A prospective analysis.(College of Surgeons of Sri Lanka, 2015) Bandara, L.M.P.M.; Siriwardana, R.C.; Niriella, M.A.; Dassanayake, A.S.; Liyanage, C.A.H.; Sirigampala, C.; Upasena, A.; de Silva, H.J.INTRODUCTION: Transarterial-chemo-embolization (TACE) is used for palliation of unresectable hepatocellular carcinoma (HCC). We studied the tolerability of TACE in a cohort of patients with NASH and alcoholic cirrhosis related HCC. MATERIAL AND METHODS: Of 290 patients with HCC(July 2011 - December 2014), 84 underwent TACE. They were monitored for post-TACE complications: post embolization fever(PEF), nausea and vomiting (NV), abdominal pain, infection, acute hepatic decompensation (AHD) and acute kidney injury (AKI). RESULTS: 84 patients [90.5% males, 89.2% cirrhotics, 89.2% nodular HCC, median age 63(34-84) years] underwent 111 TACE sessions. All were Child class A [69.4% sessions(n=77)] or B; ascites and portal vein invasion was present in 18(16.2%) and 15(13.6%), respectively. 42 (38.2%) TACE procedures resulted in complications [PEF 28(25.2 %), NV 4(3.6%), abdominal pain 9(8.1%), infection 7(6.3%), AHD 13(11.7%), AKI 3(2.7%)]. There were no immediate post-TACE deaths. On univariate analysis elevated serum bilirubin (p=0.046) and low serum albumin (p=0.035) predicted PEF while low serum albumin (p=0.021) and low platelet counts (p=0.041) predicted AHD. In the multivariate model, factors with p 5 cm (p=0.049,OR=2.410)and elevated serum bilirubin (p=0.036,OR=1.517) predicted AHD. CONCLUSIONS: In NASH and alcoholic cirrhosis related HCC patients pre- procedure serum bilirubin, ascites, tumour size and female gender predicted PEF post-TACE. Tumours larger 5cm with elevated bilirubin predicted AHD post-TACE.Item Perioperative outcome following establishment of deceased donor liver transplantation: A single center experience in Ragama, Sri Lanka(Sri Lanka Medical Association, 2018) Withanachchi, A.D.; Thalagala, T.A.E.S.; Liyanage, I.K.; Dassanayake, A.S.; de Silva, A.P.; Gunetilleke, M.B.; Siriwardana, R.C.; Niriella, M.A.INTRODUCTION AND OBJECTIVES: Liver transplant (LT) perioperative mortality is a good performance indicator among transplant centres. Colombo North Teaching Hospital (CNTH) is the first LT program in Sri Lanka. We aimed to evaluate the perioperative (30 day) outcomes and complications of patients who underwent deceased donor liver transplantation (DOLT) at CNTH between the first 9 DDLTs that were carried out before 2016 (Tl) and the last 10 DDLTs after 2016 (T2). METHODS: Retrospective analysis of pre-operative records, operation notes, discharge and follow up notes were carried out on all patients who underwent DOLT at CNTH. RESULTS: A total of 19-DDLTs were performed during this period. Mean age of the recipients was 50.3 (Tl :52.9, T2:47.9) years: Indications (n) for DDLT were: advanced cirrhosis with high MELD (12), other complications of cirrhosis (3),."cirrhosis with hepatocellular carcinoma (3) and acute liver failure (1 ). Aetiology of cirrhosis (n) were: cryptogenic (13), alcohol (3), autoimmune hepatitis (1), other (1). Pre transplant MELD was 16 in Tl and 18 in T2. Average hospital stay was 11.1 days (7.4 days in the intensive care). Perioperative mortality was 4/9 (44%) in Tl and 2/10 (20%) in T2. Mortality was due to PNF (3), sepsis (2) and post-operative reperfusion syndrome (1). Other post-operative complications (in Tl and T2) were: hepatic artery thrombosis (0,0), cholestasis (0, 1 ), acute cellular rejection (0,2), hydrothorax (0,3), clinically significant tacrolimus toxicity (1,o) and acute renal failure (4,2). CONCLUSION: Perioperative mortality has reduced and outcomes improved in the second half indicating success of the CNTH LT program.Item Unequal distribution of liver fat warrants careful selection of biopsy site during donor assessment(Sri Lanka Medical Association, 2017) Siriwardana, R.C.; Sivasundarama, T.; Tillakaratne, M.S.B.; Paranahewa, L.INTRODUCTION & OBJECTIVES: Non-alcoholic fatty liver disease (NAFLD) is a major health concern. Liver fat deposition seems to have a segmental variation. This can affect invasive, and non-invasive detection of NAFLD. The present study evaluates the pattern of fat distribution of the liver using liver computed tomogram (CT) attenuation index. METHODS: Two radiologists evaluated 517 non-contrast CT abdomen and pelvis images. Two 40mm2 regions of interest (ROIs) were selected from each segment. The hepatic segmental densities were obtained by calculating the mean densities of areas of corresponding liver segments. The mean hepatic attenuation (MHA) was quantified by obtaining the mean segmental densities. Densities were compared among segments and with the MHA. RESULTS: The median age was 58 years (min-max: 9-88; IQR: 45-67) and 276 (53.4 %) were males. The overall median hepatic density (i.e. grand median) was 53.05 (95% CI 52.95-53.15) Hounsfield units (HU). Lowest median density was observed in segment IVb, significantly lower compared with other segments (p<0.05). Highest median segmental density was observed in segment V compared to other segments (p<0.05). Segments V, VI and VIII had higher median densities compared with grand median hepatic density (i.e. 53.05; whereas median densities of segments II, III and VII were not significantly different from the grand median. CONCLUSION: Liver biopsy taken from segments II, III and VII are likely to be the most representative of overall fat deposition.Item Standard local infiltration vs. additional laparoscopic-guided transverse abdominis plane block in laparoscopic cholecystectomy: interim analysis of double blinded randomized control study(Sri Lanka Medical Association, 2017) Tillakaratne, M.S.B.; Gunetilleke, B.; Kumarage, S.; Siriwardana, R.C.INTRODUCTION & OBJECTIVES: Transverse abdominal plane block (TAP) is a new technique used in perioperative analgesia. It has shown a clear benefit in long laparoscopic procedures. Current trial evaluates its efficacy in uncomplicated laparoscopic cholecystectomy. METHODS: A single centre double blinded randomized control trial was designed with 45 patients to each group based on 80% power at a p<0.01. Patients who underwent elective uncomplicated laparoscopic cholecystectomy were randomized in to local port site infiltration of bupivacaine and additional TAP block groups. Primary efficacy variables were postoperative pain score and requirement for opioids measured every six hourly. Duration of immobilization and hospital stay were some of the secondary variables. An interim analysis was done at 8 months. RESULTS: Thirty eight patients were randomized to two groups. Twenty-two (58%) were given TAP blocks. The male:female ratio (p=0.24), age (p=0.4), indication for surgery (p=0.34), ASA (p=0.45) and BMI (p=0.58) were similar in the two groups. There was no difference in operating time (p=0.28), intraoperative findings (p=0.4) and the difficulty index (p=0.26). Six hourly pain scores till the time of discharge, total and six hourly opioid dose, number of vomiting episodes, total hospital stay (p=0.98) and time to mobilize out of the bed (p=0.63) were similar in the two groups. CONCLUSION: TAP block does not have an added advantage over standard port site infiltration in uncomplicated laparoscopic cholecystectomy.