Outcome of ERCP related to case-volume

Background and aims In some studies, high endoscopic retrograde cholangiopancreatography (ERCP) case-volume has been shown to correlate to high success rate in terms of successful cannulation and fewer adverse events. The aim of this study was to analyze the association between ERCP success and complications, and endoscopist and centre case-volumes. Methods Data were obtained from the Swedish National Register for Gallstone Surgery and ERCP (GallRiks) on all ERCPs performed for Common Bile Duct Stone (CBDS) (n = 17,873) and suspected or confirmed malignancy (n = 6152) between 2009 and 2018. Successful cannulation rate, procedure time, intra- and postoperative complication rates and post-ERCP pancreatitis (PEP) rate, were compared with endoscopist and centre ERCP case-volumes during the year preceding the procedure as predictor. Results In multivariable analyses of the CBDS group adjusting for age, gender and year, a high endoscopist case-volume was associated with higher successful cannulation rate, lower complication and PEP rates, and shorter procedure time (p < 0.05). Centres with a high annual case-volume were associated with high successful cannulation rate and shorter procedure time (p < 0.05), but not lower complication and PEP rates. When indication for ERCP was malignancy, a high endoscopist case-volume was associated with high successful cannulation rate and low PEP rates (p < 0.05), but not shorter procedure time or low complication rate. Centres with high case-volume were associated with high successful cannulation rate and low complication and PEP rates (p < 0.05), but not shorter procedure time. Conclusions The results suggest that higher endoscopist and centre case-volumes are associated with safer ERCP and successful outcome.

Axillary vein catheterization using ultrasound guidance: A prospective randomized cross-over controlled simulation comparing standard ultrasound and new needle-pilot device

Background: Real-time ultrasound (US) guidance facilitates central venous catheterization in intensive care unit (ICU). New magnetic needle-pilot devices could improve efficiency and safety of central venous catheterization. This simulation trial was aimed at comparing venipuncture with a new needle-pilot device to conventional US technique. Methods: In a prospective, randomized, simulation trial, 51 ICU physicians and residents cannulated the right axillary vein of a human torso mannequin with standard US guidance and with a needle-pilot system, in a randomized order. The primary outcome was the time from skin puncture to successful venous cannulation. The secondary outcomes were the number of skin punctures, the number of posterior wall puncture of the axillary vein, the number of arterial punctures, the number of needle redirections, the failure rate, and the operator comfort. Results: Time to successful cannulation was shorter with needle-pilot US-guided technique (22 s (interquartile range (IQR) = 16–42) vs 25 s (IQR = 19–128); median of difference (MOD) = −9 s (95%-confidence interval (CI) −5, −22), p < 0.001). The rates of skin punctures, posterior wall puncture of axillary vein, and needle redirections were also lower ( p < 0.01). Comfort was higher in needle-pilot US-guided group on a 11-points numeric scale (8 (IQR = 8–9) vs 6 (IQR = 6–8), p < 0.001). Conclusions: In a simulation model, US-guided axillary vein catheterization with a needle-pilot device was associated with a shorter time of successful cannulation and a decrease in numbers of skin punctures and complications. The results plea for investigating clinical performance of this new device.

Comparison of Bolus and Continuous Infusion of Adrenocorticotropic Hormone During Adrenal Vein Sampling

BackgroundAdrenocorticotropic hormone (ACTH) is widely used in adrenal vein sampling (AVS) and can be administered as a bolus injection or continuous infusion. The optimal administration method has not been determined. We aimed to compare the effects of ACTH bolus with infusion on cannulation success, lateralization assessment and adverse events (AEs).MethodsRetrospectively collected data from patients with primary aldosteronism who underwent AVS with ACTH at a tertiary hospital in China. Rate of successful cannulation, lateralization index (LI), complete biochemical remission and AEs related to AVS were analyzed.ResultsThe study included 80 patients receiving ACTH bolus and 94 receiving infusions. The rate of successful cannulation was comparable between bolus and infusion groups (75/80, 93.4% vs 88/94, 93.6%). In those with successful cannulation, the bolus group had a higher selectivity index than the infusion group, while LI [6.4(1.8-17.5) vs. 7.6(2.0-27.8), P=0.48] and rate of complete biochemical remission (43/44, 97.7% vs 53/53, 100%, P=0.45) did not significantly differ between the two groups. One in the bolus and one patient in the infusion group had adrenal vein rupture but they recovered with conservative treatment. The bolus group reported more transient AEs such as palpitation (52.9% vs 2.2%) and abdominal discomfort (40.0% vs 2.2%) than the infusion group.ConclusionsDue to their similar effects on cannulation success and lateralization, but a lower rate of transient AEs in the infusion group, the continuous infusion method should be recommended for ACTH stimulation in AVS.

OUR ENDOSCOPIC RETROGRADE CHOLANGIOPANCREATICOGRAPHY EXPERIENCES: SINGLE CENTER, 688 PATIENTS

Introduction and Aim: Successful ERCP requires deep cannulation of the common bile duct and/or the main pancreatic duct through the major duodenal papilla (papilla of Vater). Complications have been reported in cases of selective biliary cannulation, but this diminishes in experienced hands. The aim of this topic is to evaluate the practices and results in our clinic on how to achieve successful cannulation and sphincterotomy at minimum risk for the patient. Methods: The results of 688 patients who underwent ERCP in the endoscopy unit of our clinic over a 6-year period (2015-2021) are evaluated. Demographic findings, co-morbidities, duration of the procedure, presence of periampullary diverticulum, difficult cannulation rate, stent use, complication rate and successful cannulation rates of the patients were evaluated. Results: 58.5% of the patients were female. Heart diseases were found in 44.6% of the patients, kidney diseases in 11.5%, lung diseases in 14.9%, central nervous system diseases in 7.8% and malignancy in 2.1%. The common bile duct diameter is 12.98 ± 3.44 mm, and the mean stone size is 8.70 ± 4.50 mm. Periampullary diverticulum was present in 110 (15.9%) of the patients, and stony gall bladder was present in 48.0% of the patients. Selective cannulation was performed in 77.9% and pre-cut sphincterotomy was performed in 18.2%. Periampullary malignancy was detected in 12.1% of patients, and stent was applied to 22.1% of patients. Failed in 3.1% of patients. Emergency laparotomy was performed in 4 patients (0.6%). Bleeding was found in 58 patients (8.5%), perforation in five patients (0.8%), pancreatitis in 25 patients (4.0%), and mortality in six patients (1.0%). Conclusions: Although endoscopic retrograde cholangiopancreatography is an effective diagnostic and therapeutic tool, it can lead to serious complications. ERCP indication should be put correctly, procedures should be done by experienced people. In experienced hands, the success rate is high even with anatomical variations and difficult stones.

Transpancreatic precut papillotomy versus double-guidewire technique in difficult biliary cannulation: a systematic review and meta-analysis

Background and study aims Approximately 11 % of biliary cannulations are considered difficult. The double guidewire (DGW-T) and transpancreatic sphincterotomy (TPS) are two useful techniques when difficult cannulation exists and the main pancreatic duct is unintentionally accessed. We carried out a systematic review and meta-analysis to evaluate the effectiveness and security of both DGW-T and TPS techniques in difficult biliary cannulation. Methods We conducted a systematic review in different databases, such as PubMed, OVID, Medline, and Cochrane Databases. Were included all RCT which showed a comparison between TPS and DGW in difficult biliary cannulation. Endpoints computed were successful cannulation rate, median cannulation time, and adverse events rate. Results Four studies were selected (4 RCTs). These studies included 260 patients. The mean age was 64.79 ± 12.99 years. Of the patients, 53.6 % were men and 46.4 % were women. The rate of successful cannulation was 93.3 % in the TPS group and 79.4 % in the DGW-T group (P = 0.420). The rate of post-endoscopic retrograde cholangiopancreatography pancreatitis (PEP) was lower in patients who had undergone TPS than DGW-T (TPS: 8.9 % vs DGW-T: 22.2 %, P = 0.02). The mean cannulation time was 14.7 ± 9.4 min in the TPS group and 15.1 ± 7.4 min with DGW-T (P = 0.349). Conclusions TPS and DGW are two useful techniques in patients with difficult cannulation. They both have a high rate of successful cannulation; however, the PEP was higher with DGW-T than with TPS.

Impact of Previous Tunnelled Vascular Catheters and their Location on Upper Limb Arteriovenous Fistula Function

Background: Long-term Arteriovenous Fistula (AVF) survival has been shown to be adversely impacted by the presence of previous Tunnelled Vascular Catheters (TVC). We analysed the effect of previous TVCs and their location (ipsilateral versus contralateral) on the successful function of upper limb AVFs in the first 12-months after creation. Methods: We retrospectively reviewed clinical data on patient's first upper limb AVFs, created between January 2013 and December 2017. We analysed the rates of successful AVF function (successful cannulation using 2 needles for ≥50% sessions over a 2-week period) at 6- and 12- months post creation, time to AVF maturation, and rates of assisted maturation. Results: 287 patients with first AVFs were identified, of which 142 patients had a previous TVC (102 contralateral, 40 ipsilateral) and 145 had no previous TVC. The No TVC group had higher rate of AVF function at both 6-months (68.6% vs 54.3%, OR 1.84, 95% CI 1.00-3.39, p=0.05) and 12-months (84.3% vs 63.5%, OR 3.10, 95% CI 1.53-6.26, p=0.002) compared to the TVC group. The Contralateral TVC group had higher rate of AVF function at 6-months (59.6% vs 40%, OR 2.21, 95% CI 1.01-4.88, p=0.05), but not at 12-months (65.9% vs 57.6%, OR 1.42, 95% CI 0.62-3.25, p=0.40) compared to the Ipsilateral TVC group. The median time to AVF maturation in the Contralateral and Ipsilateral TVC groups were 121.5 and 146 days respectively (p=0.07). Assisted maturation rates were lower in No TVC group compared to the TVC group (12.4% vs 27.9%, p=0.007), but similar between the Contralateral and Ipsilateral TVC groups (28.7% vs 25.7 %, p= 0.74). Conclusions: Previous TVC use was associated with poorer AVF function at 6- and 12-months, with a higher rate of assisted maturation. The presence of an ipsilateral TVC was associated with lower successful AVF use at 6-months, compared to contralateral TVC.

A comparison of sedation with midazolam–ketamine versus propofol–fentanyl during Endoscopic retrograde cholangiopancreatography in adults

Background: Patients undergoing endoscopic retrograde cholangiopancreatography (ERCP) require adequate sedation or general anesthesia. This prospective clinical study investigated the safety and efficacy of midazolam -Ketamine versus propofol-fentanyl during ERCP procedures. patients and Methods: The study included 80 patients who underwent ERCP following anesthesiologist-administered sedation with fentanyl-propofol and other group midazolam-Ketamine. Procedural data, oxygen saturation, blood pressure, heart rate, recovery time, discharge times the effectiveness of sedation during the procedure was assess according to Modified Observer’s Assessment of Alertness/Sedation (MOAA/S) scores. Results: Sedation related complications occurred in 13 of 40 patients in group Ketamine – midazolam and 5 of 40 patients in group fentanyl-propofol included nausea / vomiting, agitation and headache. Most events were minor and did not necessitate discontinuation of the procedure. Successful cannulation was performed in all patients. the time of recovery was significantly lower in group MK with 5.15 ± 1.3 min compared to 6.15 ± 2 in group FP, and discharge was significantly. lower in group FP with 20.35 ± 0.7 min, compared to 24.15 ± 3.4 min in group MK. this occurred due to the number of patients who had side effects in midazolam-Ketamine group was more than the other group. Conclusion: We concluded that FP, more suitable for sedation and less complications rather than MK. Although no significant complications were seen.

Difficult Biliary Cannulation for Intradiverticular Papilla: Forceps Technique Revisited

Periampullary diverticula (PAD) have been encountered in 5.9 to 18.5% of patients during all the endoscopic retrograde cholangiopancreatography (ERCP). Cannulation in the presence of PAD can sometimes be difficult, time consuming, and often requires a higher level of endoscopic skills.Several techniques have been reported to facilitate and increase the chances of successful bile duct cannulation in the presence of PAD. The two-devices in one-channel method has been sparingly used. It involves the simultaneous use of a biopsy forceps and another instrument, either a cannula or sphincterotome through the same working channel. We successfully performed ERCP in three cases, where bile duct cannulation was performed in the setting of intradiverticular papilla using two-devices in one-channel method.We feel that the two-devices in one-channel method can be very useful and positioned higher up in the algorithm for successful cannulation in patients with PAD.

Fistulotomy versus standard cannulation as the primary technique for all patients undergoing ERCP with a native papilla: A protocol for a single centre randomized controlled trial

Background Endoscopic retrograde cholangiopancreatography (ERCP) is an indispensable procedure for the management of pancreaticobiliary diseases. Post-ERCP pancreatitis (PEP) is the most common serious adverse event. One risk factor of PEP is difficulty achieving biliary access. The conventional ERCP technique involves the cannulation of the bile duct via the ampulla of Vater, followed by sphincter incision using electrocautery. Conventionally if the standard method fails then precut techniques have been utilized as an alternative means of gaining biliary access. The needle-knife fistulotomy (NKF) technique involves identifying the intra-duodenal segment of the bile duct and uses a needle knife to incise directly into the bile duct. This is done above and away from the natural office, thus minimizing thermal damage which may result in PEP. Our recent prospective study of 50 patients demonstrated the safety and feasibility of the NKF precut technique as a primary means of gaining biliary access. The next step is to conduct a randomized-controlled trial to compare the efficacy and safety of initial NKF to the standard cannulation in a non-selective patient population undergoing ERCP.Methods A randomized control trial of 538 consecutive, non-selective patients with pancreatoticobiliary disease undergoing ERCP at a tertiary care centre in Kingston, Ontario, Canada will be conducted. Patients will be randomized to one of two treatment groups, standard cannulation or NKF. The primary outcome of the study will be the incidence of PEP. Secondary outcomes will include rate of successful cannulation of the CBD, time to successful cannulation, total procedure time, difficulty of cannulation and incidence of complications. Discussion This RCT will yield important answers regarding the efficacy and safety of initial NKF to the standard cannulaton in a non-selective patient population undergoing ERCP. The results of our study could alter ERCP practices and outcomes if NKF is shown to reduce PEP risk.Trial Registration This trial was registered on clinicaltrials.gov (NCT04559867) on September 23, 2020. https://clinicaltrials.gov/ct2/show/NCT04559867?term=bechara&draw=2&rank=2