Cannulation Technique Research Articles

Prospective Randomized Study of Ultrasound Guided In-Plane Versus Out-Of-Plane Radial Artery Cannulation in Adult Cardiac Surgery Patients

Background: With the more frequent use of ultrasound in medical practice, radial artery cannulation using ultrasound has proven to be better than the traditional landmark technique. Ultrasound-guided techniques reduce the risk of cannulation failure and complications like hematoma, arterial spasm, etc. Ultrasound is helpful in obesity, pediatric age group, and hemodynamically unstable patients with a feeble pulse. This study performed a comparison between in-plane and out-of-plane ultrasound-guided techniques for cannulation of the radial artery.Methodology: This study was prospective randomized and interventional. The study involved adult patients scheduled to undergo cardiac surgery requiring arterial cannulation. Institutional ethics committee approval and consent was taken from the patients. A total of 128 patients were randomized into the in-plane and the out-of-plane ultrasound groups. In the operation room, radial artery cannulation was done under local anesthesia using a hockey stick ultrasound probe. The objective of the study was to compare the incidence of first-pass success rate, the number of attempts, number of redirections, cannulation completion time and incidence of complications in two groups.Results: The demographic data was found to be comparable. The in-plane group had a higher incidence of first attempt success as compared to the out-of-plane group with a P value of 0.021. There was no statistically significant difference in other clinical outcomes.Conclusion: The in-plane technique had a higher first-attempt success rate. Hence it should be considered for use in routine practice to improve patient care.

Commentator Discussion: Safe and controlled technique of aortic cannulation for thoracoabdominal normothermic regional perfusion

Commentator Discussion: Safe and controlled technique of aortic cannulation for thoracoabdominal normothermic regional perfusion

A narrative review on the evolution and impact of smart cannulas in minimally invasive procedures.

This study aimed to explore the evolution and impact of smart cannulas in enhancing outcomes and expanding the scope of minimally invasive cardiac surgery. In this study, a comprehensive review of the relevant literature was conducted, focusing on articles detailing the development, implementation, and outcomes associated with smart cannulas in cardiac surgery. PubMed, MEDLINE, and Google Scholar databases were searched until January 2024 using specific search terms related to smart cannulas and cardiac surgery. The review identified six studies, of which five met the inclusion criteria after screening titles and abstracts. Key findings included improved venous drainage, reduced complications, and enhanced surgical precision. From early prototypes to contemporary designs, smart cannulas demonstrated improved access, enhanced perfusion, and reduced complications compared to traditional cannulation methods. Additionally, advancements in technology-enabled remote access perfusion and facilitated complex procedures in pediatric and adult populations. Smart cannulas represent a significant advancement in cardiac surgery, offering safer and more efficient alternatives to conventional cannulation techniques. The versatility and effectiveness of smart cannulas have paved the way for expanding the applications of minimally invasive cardiac surgery, ultimately benefiting patients through better improved outcomes and reduced morbidity. Continued research and innovation in smart cannula technology promise further enhancements in the field of cardiac surgery.

A Randomized Study Comparing Ultrasound-Guided Internal Jugular Vein Cannulation Using Two Techniques: Short-Axis Out-of-Plane With Dynamic Needle Tip Positioning Versus Long-Axis In-Plane.

Introduction Internal jugular vein (IJV) cannulation is a routine procedure in operating rooms, critical care units, and perioperative settings. Ultrasound guidance has notably increased the success rates of IJV cannulation. A modified ultrasound technique known as the short-axis out-of-plane method with dynamic needle tip positioning (DNTP) allows for continuous visualization of the needle tip throughout the procedure. This study aims to compare the first-pass success rate of IJV cannulation using the DNTP and long-axis in-plane (LAIP) approaches. Methods One hundred patients between 18 and 70 years undergoing elective surgery requiring IJV cannulation were recruited.Patients were assigned randomly to the DNTP group (n = 50) or the LAIP group (n = 50). We recorded the first-pass success rate, time to achieve successful cannulation, number of skin punctures, overall success rate within five minutes, and potential complications such as pneumothorax and hematoma. Results The first pass success rate was higher in the DNTP group (48/50, 96%) as compared to the LAIP group (38/50, 76%, relative risk, 1.67; 95% confidence interval, 0.039-0.707; p = 0.008). The cannulation time was shorter in DNTP (116.98 ± 22.90 seconds) versus the LAIP group (213.04 ± 52.08 seconds; p < 0.001). No complications like pneumothorax or hematoma were noted in both groups. Conclusion We conclude that the ultrasound-guided DNTP technique for IJV cannulation, as compared with the LAIP technique, may significantly improve the first attempt cannulation, number of attempts, and cannulation time.

Combination of Precut Techniques in Difficult Biliary Cannulation.

Selective biliary cannulation (SBC) is a prerequisite for successful endoscopic retrograde cholangiopancreatography (ERCP). SBC has the potential to fail in as many as 20% of cases, even with skilled endoscopists. Precut incision techniques like needle-knife sphincterotomy (NKS) and transpancreatic septotomy (TPS) can be used in cases where standard cannulation techniques fail. However, these precut techniques may also fail in some cases. We aimed to evaluate the procedural success of the combined TPS + NKS technique in difficult biliary cannulation. The study included 289 patients who underwent ERCP with precut techniques from 2017 to 2022. Patients were classified into the following three groups and evaluated retrospectively in terms of cannulation success, and ERCP-related adverse effects: Transpancreatic septotomy, NKS, and TPS + NKS; statistical package for the social sciences (SPSS), version 29.0, software was used to analyze the data. The success rate of SBC was 69% in the TPS group, 75.3% in the NCS group, and 87% in the TPS + NCS group. There was no significant difference between the NKS and TPS + NKS groups. Cannulation success in both NKS group and NKS + TPS groups was significantly higher than in the TPS group (p < 0.001). Complication rates were similar. In cases where standard sphincterotomy and precut techniques fail, a second precut technique can be used. A previous TPS does not prevent NKS. Abiyev A, Tuzcu B, Bilican G, et al. Combination of Precut Techniques in Difficult Biliary Cannulation. Euroasian J Hepato-Gastroenterol 2024;14(1):56-59.

Needle-Knife Fistulotomy Versus Needle-Knife Papillotomy in Difficult Biliary Cannulation: A Systematic Review and Meta-Analysis.

Endoscopic retrograde cholangiopancreatography (ERCP) is an essential endoscopic therapeutic modality for biliary and pancreatic diseases. Needle-knife fistulotomy (NKF) and papillotomy (NKP) are the two most commonly used rescue techniques for patients with difficult biliary cannulation. However, there remains a need for comparative studies on these approaches to inform clinical decision-making. This meta-analysis aimed to evaluate the efficacy and safety of NKF compared to NKP as a rescue technique in difficult biliary cannulation after failed conventional ERCP. We searched PubMed, Scopus, Embase, and Web of Science databases through November 2023 to include all studies that directly compared the outcomes of NKF with NKP in difficult biliary cannulation. Single-arm studies were excluded. Pooled odds ratios (ORs) and 95% confidence intervals (CIs) for dichotomous data related to clinical events were calculated using the Mantel-Haenszel method within a random-effect model. The primary outcome was the biliary cannulation success rate. Four studies with 823 patients (n = 376 NKF vs. n = 447 NKP) were included in our analysis. There was no significant difference between the two groups in biliary cannulation success rate (91.7% vs. 86.9%, respectively; OR = 1.54, 95% CI: 0.21 - 2.49, P = 0.14; I2 = 0%). However, the overall rate of adverse events was significantly lower in the NKF group than in the NKP group (OR = 0.46, 95% CI: 0.25 - 0.84, P = 0.01). Pancreatitis (OR = 0.23, 95% CI: 0.05 - 1.11, P = 0.07) and bleeding (OR = 1.43, 95% CI: 0.59 - 3.46, P = 0.42) were similar between the two groups. No significant differences in cholangitis, cholecystitis, perforation, or mortality were observed. Our meta-analysis indicates comparable success rates in comparing NKF and NKP techniques for difficult biliary cannulation after failed conventional ERCP cannulation. Notably, the NKF technique significantly reduces overall adverse events compared to NKP, suggesting that NKF may be preferable due to its favorable safety profile. Additional randomized controlled trials (RCTs) are warranted to evaluate the interval benefit of an NKF technique.

Venovenous bypass in liver transplantation: Exploring the benefits, efficacy, and safety.

Venovenous bypass (VVB) is a technique used in liver transplantation (LT) to maintain hemodynamic stability and abdominal organ perfusion and thereby improve patient outcomes. Despite its perceived benefits, VVB utilization has declined globally due to concerns related to heparinization, major bleeding and the need for expertise. Recent advancements, such as percutaneous cannulation techniques and improved extracorporeal technology have improved the safety of VVB in LT. This paper presents a modified VVB circuit with enhanced safety features. Cannulation plays a pivotal role in VVB establishment, with percutaneous methods increasingly favored. Studies demonstrate VVB's efficacy in improving patient outcomes with lower incidence of acute kidney injury and reduced operative time and blood loss, with no added morbidity or mortality. However, its routine use faces challenges, with alternative techniques gaining traction. Our experience highlights VVB's role in various clinical scenarios, including patients with high Model for End-Stage Liver Disease (MELD) scores, challenging surgical anatomy, portal vein thrombosis and pre-existing cardiovascular disease, emphasizing its safety and efficacy. Continued research is needed to optimize VVB techniques and ensure better outcomes for liver transplant recipients.

The knowledge, attitudes, and practices of arteriovenous access assessment among hemodialysis nurses: A multicenter cross-sectional survey.

Hemodialysis nurses' cannulation technique, monitoring, and management methods can affect patients' vascular access longevity. An arteriovenous access assessment comprises a medical history and vascular assessment through physical examination and surveillance. However, further exploration is needed to fully understand hemodialysis nurses' knowledge, attitudes, and practices (KAP) in this area. Between June and July 2023, we recruited hemodialysis nurses from 21 cities in Guangdong Province using a convenience sampling method. Four questionnaires-the General Data Questionnaire, the KAP Scale of Arteriovenous Access Assessment among Hemodialysis Nurses, the Utrecht Work Engagement Scale, and the NASA Task Load Index-were utilized for data collection through the Questionnaire Star platform. Of the 530 hemodialysis nurses participating in the study, 458 (86.4%) had a valid response. The participants demonstrated moderate knowledge and practice levels regarding arteriovenous access assessment and exhibited positive attitudes. We identified several factors related to arteriovenous access assessment that predict KAP in hemodialysis nurses. These factors included years of experience as a hemodialysis nurse, whether a nurse's knowledge of physical examination was sufficient to meet clinical needs, whether a nurse had received training in performing physical examination, whether a nurse's department regularly checked the quality of physical examination, and nurses' levels of work engagement and mental workload. All factors explained 32.4% of the variance in participants' KAP regarding arteriovenous access assessment. Improving hemodialysis nurses' assessment of arteriovenous access is crucial to ensure optimal patient care. Dialysis center managers and educators should prioritize understanding hemodialysis nurses' KAP of arteriovenous access assessment and any factors influencing these areas.

Central (Aortic) Cannulation versus Peripheral (Axillary or Femoral) Cannulation in Acute Type A Aortic Dissections: A Meta-Analysis of Comparative Studies.

There has been an increased interest in using antegrade cannulation techniques during surgery for type A aortic dissection. While the utilization of central artery cannulation has been on the rise in recent times, its effectiveness and safety still require thorough examination. This study aimed to explore both the efficiency and safety of central arterial cannulation. A meta-analysis was conducted on studies that evaluated surgical outcomes when using central artery cannulation (CAC) in comparison to axillary artery cannulation (AXC) or femoral artery cannulation (FAC). 10 retrospective observational studies were included, enrolling 3022 patients (CAC = 1208 vs. FAC = 606; CAC = 1051 vs. AXC = 1119). Among these, 4 articles involved axillary artery cannulation, femoral artery cannulation, and central artery cannulation. Central cannulation was linked to decreased short-term mortality [odds ratio, 0.66, 95% confidence interval (CI) (0.48, 0.89), 2 = 3.27, p = 0.007; = 0; p = 0.86] compared to femoral cannulation. Additionally, central cannulation was associated with a lower occurrence of temporary neurological dysfunction (TND) [odds ratio, 0.57, 95% CI (0.38, 0.85), 2 = 0.88, p = 0.006; = 0%, p = 0.83] when compared with femoral cannulation. However, there was no statistical significance in mortality and TND between the central cannulation and axillary cannulation groups. This meta-analysis reveals that central cannulation surpasses femoral cannulation in lowering short-term mortality and the occurrence of TND among patients undergoing surgery for type A acute aortic dissection. However, central cannulation does not exhibit a higher mortality and TND compared to axillary cannulation.

Outcomes of protocol-based management for venoarterial extracorporeal membrane oxygenation in congenital heart surgery - A 2-decade experience.

Extracorporeal membrane oxygenation (ECMO) is a vital mechanical circulatory support used with increasing frequency in complex congenital cardiac surgeries. This study evaluated the outcomes of a protocol-based venoarterial (VA) ECMO program following congenital heart surgeries. This was a retrospective review of 198 patients who underwent VA-ECMO after congenital cardiac surgeries at our institute between 2004 and 2023. Patients were divided into pre-ECMO protocol (2004-2017) and post-ECMO protocol (2018-2023) implementation. There were 107 patients in the preprotocol era and 91 in the postprotocol era. We compared weaning from ECMO and survival to hospital discharge between the two eras. An analysis of the factors influencing survival to hospital discharge was also done. ECMO was initiated through the central cannulation technique through median sternotomy in all patients. The median age and weight at initiation were 4 months (interquartile range [IQR] 1-33.5 months) and 4.4 kg (IQR 3.3-10.1 kg), respectively. The successful weaning of the ECMO (n = 67/91, 73.6%) and survival to discharge (n = 43/91, 47.3%) were higher in patients of the postprotocol era. However, it was not statistically significant. Higher risk adjustment for congenital heart surgery-1 >3 and acute kidney injury were independent predictors of poorer survival to hospital discharge. A protocol-based ECMO program may improve outcomes of successful weaning and survival to discharge in patients undergoing congenital cardiac surgeries.

Comparing short-axis versus long-axis ultrasound-guided techniques for internal jugular vein cannulation: A meta-analysis of clinical outcomes and safety.

Central venous access plays a crucial role in various clinical settings, and ultrasound guidance has become increasingly popular for improving its safety and success rates. The aim of this meta-analysis was to compare the short-axis (SAX) and long-axis (LAX) ultrasound-guided techniques for internal jugular vein (IJV) cannulation in terms of first needle pass success rate, number of cannulation attempts, access time, guidewire insertion time, posterior IJV wall puncture, arterial puncture, haematoma and catheter-related bloodstream infection. A comprehensive literature search was conducted, and randomised controlled trials (RCTs) comparing SAX and LAX techniques for IJV cannulation on adults were included. A total of 11 RCTs involving 1183 patients were included in the meta-analysis. The SAX technique demonstrated a significantly greater first needle pass success rate and faster IJV access time compared to the LAX technique. However, more posterior IJV wall puncture was significantly associated with the SAX technique. There was no significant difference between the two techniques in terms of number of cannulation attempts, guidewire insertion time, arterial puncture, haematoma and catheter-related bloodstream infection. This meta-analysis suggests that the SAX technique may have advantages over the LAX technique in terms of first needle pass success rate and potentially reducing cannulation attempts and access time. However, the occurrence of posterior IJV wall puncture raises concerns. The decision on the choice of technique should be based on individual patient factors and operator proficiency.

Introducing an ultrasound-guided longer length peripheral IV catheter for patients with difficult venous access.

Insertion of a peripheral intravenous catheter (PIVC) is one of the most common procedures carried out in hospitals worldwide, but failure rates are unacceptably high. This local quality improvement project aimed to assess improvements in first-stick success rate, dwell time and overall catheter success rate when implementing a longer-length peripheral intravenous catheter (LPIVC) under ultrasound guidance for patients with difficult venous access (DVA). Data were collected from 386 DVA patients requiring a PIVC at one hospital. Number of catheter insertion attempts, catheter dwell time and reason for catheter removal were recorded for each patient. To implement the new DVA catheterisation pathway, registered nurses undertook a training programme comprising workshops and ultrasound-guided cannulation technique practice on phantoms. Costs and waste weights associated with LPIVC insertion, compared with midline insertion, were calculated. First-stick success rate was 95.0% using the LPIVC under ultrasound guidance. Dwell time ranged from 1 to 80 days, with a large proportion of those dwelling <1 day being placed in day-case patients. Treatment success rate with the LPIVCs was 83.6%. Equipment costs for an LPIVC insertion were £89.22 lower than for a midline insertion, and the weight of waste generated per procedure was 1 kg lower for LPIVCs. First-stick success rate of LPIVCs, aided by improved purchase in the vein and visualisation with ultrasound guidance, was very high, superior to rates reported in other studies. The procedure provides a better patient experience as successful first attempts avoid unnecessary further insertion attempts. Other benefits are increased nursing time efficiency, a reduction in clinical waste and the lower cost of the equipment required.

Evolution of distal limb perfusion management in adult peripheral venoarterial extracorporeal membrane oxygenation with femoral artery cannulation.

Limb ischaemia is a clinically relevant complication of venoarterial extracorporeal membrane oxygenation (VA ECMO) with femoral artery cannulation. No selective distal perfusion or other advanced techniques were used in the past to maintain adequate distal limb perfusion. A more recent trend is the shift from the reactive or emergency management to the pro-active or prophylactic placement of a distal perfusion cannula to avoid or reduce limb ischaemia-related complications. Multiple alternative cannulation techniques to the distal perfusion cannula have been developed to maintain distal limb perfusion, including end-to-side grafting, external or endovascular femoro-femoral bypass, retrograde limb perfusion (e.g., via the posterior tibial, dorsalis pedis or anterior tibial artery), and, more recently, use of a bidirectional cannula. Venous congestion has also been recognized as a potential contributing factor to limb ischaemia development and specific techniques have been described with facilitated venous drainage or bilateral cannulation being the most recent, to reduce or avoid venous stasis as a contributor to impaired limb perfusion. Advances in monitoring techniques, such as near-infrared spectroscopy and duplex ultrasound analysis, have been applied to improve decision-making regarding both the monitoring and management of limb ischaemia. This narrative review describes the evolution of techniques used for distal limb perfusion during peripheral VA ECMO.

Comparison of ultrasound guided supraclavicular subclavian vein versus infraclavicular subclavian/axillary vein catheterization: A systematic review and meta analysis.

Subclavian vein cannulation is an important technique of central venous cannulation with a supraclavicular and an infraclavicular approach. There are randomized controlled trials (RCTs) which highlight the various differences between these two approaches when accessed via ultrasound. We undertook a meta-analysis to compare the ultrasound guided supraclavicular subclavian and the infraclavicular subclavian/axillary vein cannulation, keeping in mind that the infraclavicular approach may lead to cannulation of either subclavian/axillary vein. This meta-analysis encompassed studies that compared ultrasound-guided supraclavicular subclavian vein and infraclavicular subclavian/axillary vein. Binary outcomes were presented as odds ratios (OR), while continuous outcomes were presented as standardized mean differences (SMD) accompanied by 95% confidence intervals (95% CI). Potential trials meeting the eligibility criteria were sought from databases including PubMed, PubMed Central, The Cochrane Library, and EMBASE, covering the period from inception to April 30, 2023. The analysis comprised a total of six randomized controlled trials (RCTs) and one retrospective observational study collectively involving 1812 patients. The first pass success rate for subclavian vein catheterization was found to be greater with the supraclavicular approach (OR = 1.91 [95% CI 1.04-3.50]; p = 0.0002; I2 = 77%). Moreover, the supraclavicular approach exhibited a significantly shorter catheterization time compared to the infraclavicular approach (SMD = -0.26 [95% CI -0.54 to 0.03]; p = 0.003; I2 = 73%). Notably, there was no substantial disparity in complication rates between the two approaches (OR = 0.66 [95% CI 0.35-1.24]; p = 0.20; I2 = 0%). Ultrasound-guided supraclavicular approach for subclavian vein catheterization is superior to the infraclavicular approach for subclavian/axillary vein catheterization, with higher first-pass success rates, shorter catheterization times. However, there were no differences in the complication rates.

Temporary extracorporeal life support: single-centre experience with a new concept.

The combination of veno-arterial extracorporeal membrane oxygenation with a micro-axial flow pump (ECMELLA) is increasingly used for cardiogenic shock (CS) therapy. We report our experience with a novel single-artery access ECMELLA setup with either femoral (2.0) or jugular venous cannulation (2.1), respectively. Data from 67 consecutive CS patients treated with ECMELLA 2.0 (n = 56) and 2.1 (n = 11) from December 2020 and December 2022 in a tertiary cardiac center were retrospectively analyzed. The mean age was 60.7 ± 11 years, 56 patients (84%) were male. CS aetiology was acute on chronic heart failure (n = 35, 52%), myocardial infarction (n = 13, 19.5%), postcardiotomy syndrome (n = 16, 24%) and myocarditis (n = 3, 4.5%). Preoperatively 31 patients (46%) were resuscitated, 53 (79%) were on a ventilator and 60 (90%) were on inotropic support. The median vasoactive inotropic score was 32, and the mean arterial lactate was 8.1 mmol/l. In 39 patients (58%), veno-arterial extracorporeal membrane oxygenation was explanted after a median ECMELLA support of 4 days. Myocardial recovery was achieved in 18 patients (27%), transition to a durable left ventricular assist device in 16 (24%). Thirty-three patients (n = 33; 49%) died on support (25 on ECMELLA and 8 on Impella after de-escalation), 9 (13%) of whom were palliated. Axillary access site bleeding occurred in 9 patients (13.5%), upper limb ischaemia requiring surgical revision in 3 (4.5%). Axillary site infection occurred in 6 cases (9%), and perioperative stroke in 10 (15%; 6 hemorrhagic, 4 thromboembolic). ECMELLA 2.0/2.1 is a feasible and effective therapy for severe CS. The single-artery cannulation technique is associated with a relatively low rate of access-related complications.

Estimation of Systolic and Diastolic Blood Pressure for Hypertension Identification from Photoplethysmography Signals

Continuous monitoring plays a crucial role in diagnosing hypertension, characterized by the increase in Arterial Blood Pressure (ABP). The gold-standard method for obtaining ABP involves the uncomfortable and invasive technique of cannulation. Conversely, ABP can be acquired non-invasively by using Photoplethysmography (PPG). This non-invasive approach offers the advantage of continuous BP monitoring outside a hospital setting and can be implemented in cost-effective wearable devices. PPG and ABP signals differ in scale values, which creates a non-linear relationship, opening avenues for the utilization of algorithms capable of detecting non-linear associations. In this study, we introduce Neural Model of Blood Pressure (NeuBP), which estimates systolic and diastolic values from PPG signals. The problem is treated as a binary classification task, distinguishing between Normotensive and Hypertensive categories. Furthermore, our research investigates NeuBP’s performance in classifying different BP categories, including Normotensive, Prehypertensive, Grade 1 Hypertensive, and Grade 2 Hypertensive cases. We evaluate our proposed method by using data from the publicly available MIMIC-III database. The experimental results demonstrate that NeuBP achieves results comparable to more complex models with fewer parameters. The mean absolute errors for systolic and diastolic values are 5.02 mmHg and 3.11 mmHg, respectively.

Low fidelity simulation versus standardized patient for teaching peripheral venous cannulation for nursing students: A crossover randomized trial

BackgroundThe placement of a peripheral venous cannulation is a procedure that all healthcare providers must be able to perform. AimThis study compared two simulation techniques of a peripheral venous cannulation (VC): low fidelity simulation (LFS) versus standardized patient (SP) in terms of efficiency. MethodsThis crossover randomized trial compared LFS to SP in VC placement for 2nd year nursing students from the Honoris United Universities. Each student performed the VC on both the manikin's arm and the SP in random order. The main outcome measure was successful of VC after the second attempt. The secondary outcome measures were time to successful of VC, number of attempts, adherence to asepsis (Registered protocol number: PACTR202111766112898). ResultsOne hundred sixty learners were needed (α = β = 5%, 20% difference between the two techniques and 53% for SC). We enrolled 172 students. No statistical difference was found concerning the main outcome measure: 135 (78.5%) versus 138 (80.2%) for respectively LFS versus SP (p:0.689), nor for the secondary outcome measures. Six out of nine non-technical skills variables had a statistically significant difference in favor of SP. ConclusionNo statistical difference was found concerning the main and secondary outcome measures. RegistrationRegistered protocol number: Pan African Clinical Trials register (PACTR202111766112898)—Date of first recruitment on February 2, 2022.

Meta-analysis of central and peripheral cannulation for type A aortic dissection.

Acute type A aortic dissection necessitates rapid and effective arterial cannulation techniques for optimal outcomes. This meta-analysis compares the safety and effectiveness of direct aortic cannulation (AoC) with peripheral cannulation (PC) via the femoral or axillary arteries in aortic surgery for acute type A aortic dissection. A systematic review following PRISMA guidelines identified 10 retrospective studies encompassing 2518 patients (961 AoC, 1557 PC). Pooled odds ratios (OR) with 95% confidence intervals (CI) were calculated to analyze perioperative characteristics, short-term mortality rates, and postoperative complications including stroke and acute kidney injury. Short-term mortality did not significantly differ between AoC and PC (OR [95% CI] = 0.78 [0.61-1.01], p = .06). Likewise, postoperative stroke (OR [95% CI] = 0.86 [0.63-1.17], p = .33) nor acute kidney injury (OR [95% CI] = 1.11 [0.89-1.37], p = .35) showed no significant differences. AoC exhibited shorter operation time whereas there were no significant differences in aortic cross clamp time and cardiopulmonary bypass time between both groups. Our meta-regression analysis, considering the distal extent of aortic replacement, indicated that variations in aortic replacement rates did not significantly impact the observed outcomes. AoC is a viable alternative to PC for acute type A aortic dissection. While both approaches offer comparable outcomes, AoC's advantage in shorter operation time warrants thoughtful consideration in clinical practice.

Anatomical review of internal jugular vein cannulation.

The internal jugular veins (IJV) are the primary venous outflow channels of the head and neck. The IJV is of clinical interest since it is often used for central venous access. This literature aims at presenting an overview of the anatomical variations, morphometrics based on various imaging modalities, cadaveric and surgical findings, and the clinical anatomy of IJV cannulation. Additionally, the anatomical basis of complications, techniques to avoid complications, and cannulation in special instances are also included in the review. The review was performed by a detailed literature search and review of relevant articles. A total of 141 articles were included and organized into anatomical variations, morphometrics, and clinical anatomy of IJV cannulation. The IJV is next to important structures such as the arteries, nerve plexus, and pleura, which puts them at risk of injury during cannulation. Anatomical variations such as duplications, fenestrations, agenesis, tributaries, and valves, may lead to an increased failure rate and complications during the procedure, if unnoticed. The morphometrics of IJV, such as the cross-sectional area, diameter, and distance from the skin-to-cavo-atrial junction may assist in choosing the appropriate cannulation techniques and hence reduce the incidence of complications. Age, gender, and side-related differences explained variations in the IJV-common carotid artery relationship, cross-sectional area, and diameter. Accurate knowledge of anatomical variations in special considerations such as paediatrics and obesity may help prevent complications and facilitate successful cannulation.

Initial experience with duodenoscopes with single-use end caps in pediatric ERCP: infection prevention comes at a cost

Background and AimsDuodenoscopes with single-use end caps were introduced to minimize infection risk, but are unstudied in pediatrics. MethodsWe collected clinical data and endoscopists’ evaluations of duodenoscopes with single-use end caps versus reusable duodenoscopes over 18 months. ResultsA total of 106 ERCPs were performed for patients aged 1-18 (mean 14.2) years. Forty-six involved single-use end caps, with 9 requiring crossover to reusable duodenoscopes. ERCPs involving single-use end caps resulted in more instances of mucosal trauma (10 vs 0, p<0.05) and post-ERCP pancreatitis (4 vs 1, p<0.05), and accounted for 8 of 9 ERCPs requiring advanced cannulation techniques. No post-ERCP infections occurred. Reported challenges included single-use end cap stiffness and difficulty with their alignment for cannulation. ConclusionsWe report difficulty with advancement, greater reliance on advanced cannulation techniques, and higher rates of PEP when using duodenoscopes with single-use end caps in pediatric ERCP. This area warrants further study.