Ultrasound guidance versus anatomical landmarks for internal jugular vein catheterization

Wire-in-needle versus conventional syringe-on-needle technique for ultrasound-guided central venous catheter insertion in the internal jugular vein: the WIN randomized trial

PURPOSE

There are different techniques for ultrasound-guided central venous catheter (CVC) insertion. When using the conventional syringe-on-needle technique, the syringe needs to be removed from the needle after venous puncture to pass the guidewire through the needle into the vein. When, alternatively, using the wire-in-needle technique, the needle is preloaded with the guidewire, and the guidewire-after venous puncture-is advanced into the vein under real-time ultrasound guidance. We tested the hypothesis that the wire-in-needle technique reduces the time to successful guidewire insertion in the internal jugular vein compared with the syringe-on-needle technique in adults.

METHODS

We randomized 250 patients to the wire-in-needle or syringe-on-needle technique. Our primary endpoint was the time to successful guidewire insertion in the internal jugular vein.

RESULTS

Two hundred and thirty eight patients were analyzed. The median (25th percentile, 75th percentile) time to successful guidewire insertion was 22 (16, 38) s in patients assigned to the wire-in-needle technique and 25 (19, 34) s in patients assigned to the syringe-on-needle technique (estimated location shift: 2 s; 95%-confidence-interval: - 1 to 5 s, p = 0.165). CVC insertion was successful on the first attempt in 103/116 patients (89%) assigned to the wire-in-needle technique and in 113/122 patients (93%) assigned to the syringe-on-needle technique. CVC insertion-related complications occurred in 8/116 patients (7%) assigned to the wire-in-needle technique and 19/122 patients (16%) assigned to the syringe-on-needle technique.

CONCLUSION

The wire-in-needle technique-compared with the syringe-on-needle technique-did not reduce the time to successful guidewire insertion in the internal jugular vein. Clinicians can consider either technique for ultrasound-guided CVC insertion in adults.

Minimally invasive approach to managing brachiocephalic trunk cannulation complicating central venous catheterization: a case report

BACKGROUND

Central venous catheterization, crucial for device insertion, monitoring, medication, and fluid resuscitation, commonly uses the subclavian, internal jugular, and femoral veins. Despite its general safety, complications like arterial puncture can be life-threatening, requiring rapid diagnosis and treatment.

CASE PRESENTATION

A 74-year-old woman in the recovery phase of cerebral infarction underwent right subclavian vein catheterization. The catheter was mistakenly placed in the brachiocephalic trunk, with its tip in the ascending aorta, as confirmed by computed tomography (CT) and digital subtraction angiography (DSA). With the high surgical risk and the complexity of endovascular treatment, catheter replacement was chosen. One month after the initial placement, the catheter was replaced with a smaller one, and another month later, it was retracted without complications. Follow-up CT and DSA revealed no leakage, with the patient's vitals remaining stable. A three-month post-discharge phone follow-up confirmed the patient's continued stability.

CONCLUSION

This case demonstrates the effective use of a catheter replacement technique as a minimally invasive repair method when other options are impractical. Ultrasound guidance is also recommended to improve the procedure's accuracy and safety.

Echogenic needles versus non-echogenic needles for in-plane ultrasound-guided infraclavicular axillary vein cannulation, a randomized controlled trial

Echogenic needles improve the reflection of the ultrasound beam. The aim of the study was to compare needle performance during ultrasound-guided cannulation of the infraclavicular axillary vein with an in-plane needle approach, using echogenic needles or non-echogenic standard needles. One hundred adult patients undergoing surgical procedures that required a central venous catheter were randomized for either echogenic or non-echogenic needles. The primary outcome was access time. Secondary outcomes encompassed total procedure time, success in first attempt, number of attempts, number of skin punctures, change of site for vascular access, catheter placement, subjective experience with needle visualization and needle procedure, and adverse events. Median (IQR) [range] venous access time was 21 (15-56) [6-440] in echogenic needle group and 26 (14-91) [6-925] in the non-echogenic needle group (p = 0.40). No statistically significant differences were found in the secondary outcome measures. One patient (non-echogenic needle group) experienced pneumothorax. In three patients in each group (6%) arterial puncture occurred. Echogenic needles did not significantly improve needle control or safety when used for infraclavicular axillary vein cannulation with an in-plane needle approach. The results indicate that standard needles are appropriate for ultrasound guided subclavian vascular access in a perioperative situation.

Central venous catheter-related infection: does insertion site still matter? A French multicentric cohort study

PURPOSE

We aim to evaluate the association between central venous catheter (CVC) insertion site and microbiological CVC complications in a nationwide cohort.

METHODS

This study was conducted using the healthcare-associated infection surveillance cohort "REA-REZO" involving 193 intensive care units (ICUs). All CVC inserted and removed during the same ICU stay between January 1st 2018 and December 31st 2022 were eligible but only those whose tips were sent for microbiological analysis were included. Primary objective was to describe CVC insertion sites and subsequent catheter-related bloodstream infection (CRBSI).

RESULTS

Out of 126,997 CVCs, 71,314 were not sent for tip culture, and only 55,663 CVCs were included, (30,548 in internal jugular [IJ], 14,423 in femoral and 10,692 in subclavian [SC] sites). The incidence of CRBSI was 0.7 [0.6-0.8] in the IJ site, 0.7 [0.6-0.9] in the femoral site, and 0.6 [0.4-0.7] CRBSI per 1000 CVC days in the SC site (p = 0.248). The multivariable Poisson regression model showed no differences of CRBSI incidence rates between the three insertion sites. Microorganisms observed in CRBSI were coagulase-negative Staphylococci (27.9%), Enterobacterales (27.5%), non-fermenting Gram-negative Bacilli (10.4%), Candida sp. (16.9%), and Staphylococcus aureus (16.9%).

CONCLUSION

Low CRBSI incidence rates were reported. CRBSI incidences rates were similar in the three insertion sites. Uncertainty remains due to potential selection bias since many CVCs had to be excluded.

Comparison of In-person VS remote learning modalities for ultrasound-guided knee arthrocentesis training using formalin-embalmed cadavers

OBJECTIVES

This study aims to compare the efficacy of remote versus in-person training strategies to teach ultrasound guided knee arthrocentesis using formalin embalmed cadavers.

METHODS

30 first-year medical student participants were randomly assigned to remote or in-person training groups. Pre- and post- training surveys were used to evaluate participant's self-confidence in their ability to perform the procedure. Participants were asked to watch a 30-minute training video and then attend a skills training workshop. The workshops consisted of 20 min of hands-on instruction followed by a skills assessment.

RESULTS

Following training, participant self-confidence increased significantly across all survey items in both groups (p = 0.0001). No significant changes in participant self-confidence were detected between the groups. Skills and knowledge-related metrics did not differ significantly between the groups with the exception of the "knowledge of instruments" variable.

CONCLUSIONS

Our data suggests that remote ultrasound-guided procedure training, although logistically complex, is a viable alternative to traditional in-person learning techniques even for a notoriously hands on skill like ultrasound guided knee arthrocentesis. Novice first-year medical student operators in the remote-training group were able to significantly increase their confidence and demonstrate competency in a manner statistically indistinguishable from those trained in-person. These results support the pedagogical validity of using remote training to teach ultrasound guided procedures which could have implications in rural and global health initiatives where educational resources are more limited.

Teaching medical students ultrasound-guided needle aspiration of synthetic cysts: effect of a formalin-embalmed cadaver simulation model

BACKGROUND

Standard training for ultrasound-guided cyst needle aspiration is currently performed on live patients during residency. This practice presents risk of iatrogenic injury to patients and provides a high-stress learning environment for medical trainees. Simulation training using synthetic cysts in a formalin-embalmed cadaver model may allow for realistic, practical, and effective training free from patient risk.

METHODS

Thirty first-year medical students viewed an orientation video, then attended a skills workshop to perform cyst needle aspiration in formalin-embalmed cadaver tissue under ultrasound guidance. Participants were randomly assigned to one of three ultrasound-trained instructor-types which included a medical student, clinical anatomist, or an ultrasound fellowship trained emergency medicine physician. After training, participants underwent a 5-min skills test to assess their ability to drain a synthetic cyst independently. Pre- and post-training self-confidence surveys were administered.

RESULTS

Ultrasound images of synthetic cysts in formalin-embalmed tissue were clear and realistic in appearance, and sonographic needle visualization was excellent. Participants took an average of 161.5 s and 1.9 attempts to complete the procedure. Two of the 30 participants could not complete the procedure within the time limit. Participants' self-reported confidence with respect to all aspects of the procedure significantly increased post-training. Mean confidence scores rose from 1.2 (95% CI 0.96 to 1.39) to 4.4 (95% CI 4.09 to 4.53) (P < 0.0001) Procedure time, number of attempts, performance scores, and self-confidence outcomes were not significantly affected by instructor type.

CONCLUSIONS

The use of synthetic cysts in formalin-embalmed cadaveric tissue is feasible, realistic, and efficacious for the teaching of ultrasound-guided needle aspiration to novice medical trainees. This simulation training method can be delivered effectively by multiple instructor types and may allow medical trainees to increase their tactical skill and self-confidence prior to performing ultrasound-guided cyst needle aspiration on live patients.

Device associated complications in the intensive care unit

Invasive devices are routinely used in the care of critically ill patients. Although they are often essential components of patient care, devices such as intravascular catheters, endotracheal tubes, and ventilators are a common source of complications in the intensive care unit. Critical care practitioners who use these devices need to use strategies for risk reduction and understand approaches to management when adverse events occur. This review discusses the identification, prevention, and management of complications of vascular, airway, and mechanical support devices commonly used in the intensive care unit.

Learning curve of ultrasound-guided percutaneous central venous port placement in children

BACKGROUND

Although percutaneous central venous port (CVP) placement can be quickly performed using minimally invasive surgery, short- and long-term complications can occur. Beginner pediatric surgeons must overcome learning curves influencing operative time and complication rates. However, few studies have been conducted on the learning curve of ultrasound-guided percutaneous CVP placement. This study analyzed the progress, results, complications, and learning curve of ultrasound-guided percutaneous CVP placement in children performed by a single beginner pediatric surgeon.

METHODS

Data from 30 children who underwent ultrasound-guided percutaneous CVP placement were reviewed. The patient characteristics, procedure indications, access veins, operator positions, operative times, and complication rates were analyzed.

RESULTS

Cumulative sum analysis revealed two stages in the learning curve: stage 1 (initial 15 cases) and stage 2 (subsequent cases). There was a correlation between the number of cases and operative time (Pearson correlation = -0.499, p = 0.005); the operative time was significantly longer in the first than in the second stage (p = 0.007). Although surgical complications occurred more frequently in the early (26.7%) than in the late stage, it was not significantly different between the two stages (p = 0.1). During the study period, the operative time was significantly reduced owing to the change in the operator's position from the patient's right side to the patient's head (p = 0.005).

CONCLUSIONS

Ultrasound-guided percutaneous CVP placement was a safe surgery that allowed a beginner pediatric surgeon to overcome the learning curve after only 15 cases and involved a relatively small number of complications compared with other pediatric surgeries. Additionally, the suitable position of the operator affected the surgical outcomes.

Central Venous Catheter Complications in the Poisoning Emergency Center: A 5-Year Cross-Sectional Study

Background

Central venous catheters (CVCs) are used widely in emergency centers, which may be associated with complications. There is a paucity of literature focusing on CVC complications, specifically in the poisoning emergency centers. In this study, we determined the frequency of CVC complications in patients with acute poisoning.

Materials and Methods

This was a cross-sectional study performed in the poisoning referral center. We reviewed the medical records of patients with acute poisoning who underwent CVC at the time of admission/during hospitalization in the poisoning intensive care unit or poisoning ward and were hospitalized between 2014 and 2019.

Results

During the study period, 33, l37 patients with acute poisoning had been admitted and CVC was placed for 400 patients (1.20% of total patients). Most of the CVCs had been placed via femoral (51%) (204 cases). The frequency of CVC complications was 13.75%. The CVC in the internal jugular (IJ) vein was associated with a higher complication (20.7%) (P value 0.02). Infection (9.2%) and pneumothorax (9.2%) were more observed with the IJ approach, while arterial puncture was more observed with subclavian (3.7%) (P value < 0.0001).

Conclusions

The frequency of CVC placement in acute poisoning patients was not noticeable. Although the femoral vein was the most commonly used approach in our institution, overall complications were more observed with the IJ vein approach.

Evaluating the effects of comprehensive simulation on central venous catheterization training: a comparative observational study

BACKGROUND

Simulation-based training (SBT) is vital to complex medical procedures such as ultrasound guided central venous catheterization (US-IJCVC), where the experience level of the physician impacts the likelihood of incurring complications. The Dynamic Haptic Robotic Trainer (DHRT) was developed to train residents in CVC as an improvement over manikin trainers, however, the DHRT and manikin trainer both only provide training on one specific portion of CVC, needle insertion. As such, CVC SBT would benefit from more comprehensive training. An extended version of the DHRT was created, the DHRT + , to provide hands-on training and automated feedback on additional steps of CVC. The DHRT + includes a full CVC medical kit, a false vein channel, and a personalized, reactive interface. When used together, the DHRT and DHRT + systems provide comprehensive training on needle insertion and catheter placement for CVC. This study evaluates the impact of the DHRT + on resident self-efficacy and CVC skill gains as compared to training on the DHRT alone.

METHODS

Forty-seven medical residents completed training on the DHRT and 59 residents received comprehensive training on the DHRT and the DHRT + . Each resident filled out a central line self-efficacy (CLSE) survey before and after undergoing training on the simulators. After simulation training, each resident did one full CVC on a manikin while being observed by an expert rater and graded on a US-IJCVC checklist.

RESULTS

For two items on the US-IJCVC checklist, "verbalizing consent" and "aspirating blood through the catheter", the DHRT + group performed significantly better than the DHRT only group. Both training groups showed significant improvements in self-efficacy from before to after training. However, type of training received was a significant predictor for CLSE items "using the proper equipment in the proper order", and "securing the catheter with suture and applying dressing" with the comprehensive training group that received additional training on the DHRT + showing higher post training self-efficacy.

CONCLUSIONS

The integration of comprehensive training into SBT has the potential to improve US-IJCVC education for both learning gains and self-efficacy.

Ultrasound-guided vs. Standard Coronary Access in Coronary Angiography: A Systematic Review and Meta-analysis

Objectives

Coronary angiography is a procedure performed during cardiac catheterization to define the coronary anatomy and determine the extent of coronary artery disease (CAD). The use of a cheap, relatively available tool like an ultrasound machine to assist in vascular access might reduce the risks associated with blind access. This study aimed to explore the efficacy and associated complications of ultrasound-guided coronary artery catheterization.

Methods

This systematic review of randomized controlled trials (RCTs) was conducted according to the Preferred Reporting Item for Systematic Reviews and Meta-Analysis (PRISMA) and was registered in PROSPERO (CRD42022365518). A systematic search was performed for all published studies without language or country restrictions and all study variables were extracted into prefilled sheets by two independent reviewers.

Results

This meta-analysis identified 10 RCTs. The results confirmed statistically significantly reductions of total complications (RR = 0.53, 95% CI 0.39-0.72, P < .001), and hematoma >5 cm formation (RR = 0.43, 95% CI 0.25-0.75, P = 0.003) in patients who underwent ultrasound-guided coronary artery catheterization.

Conclusion

Ultrasound with catheterization, as opposed to landmark-based catheterization, significantly improved the peri-catheterization operative outcomes, providing evidence for further research to be conducted and consideration for its implementation within the medical setting.

Comparison of Dialysis Catheter Insertion and Complications Under Ultrasound Guidance with or without Fluoroscopic Assistance: A Randomized Study

Background

Fluoroscopy is considered to be the gold standard and an essential requirement for catheter insertion. However, there is a paucity of data regarding the outcomes in ultrasound (USG)-guided insertion with and without fluoroscopy. We compared the complications of USG-guided tunneled dialysis catheter (TDC) insertion with and without fluoroscopy assistance.

Materials and Methods

This was a single-center randomized controlled trial (RCT) done in a tertiary hospital in North India. After screening 153 patients, 149 were enrolled: 87 were randomized into USG-guided insertion without fluoroscopy (group A) and 62 were randomized into USG-guided insertion with fluoroscopy (group B). All insertions were done in a dedicated procedure room by trained nephrologists. Outcomes were analyzed at baseline and at 1-month follow-up. Mechanical complications as well as infective and thrombotic complications were compared between both the groups.

Results

TDC insertion was successful (100%) in all the study participants (N = 149). One hundred twenty-nine catheters (86.5%) were inserted in the first attempt, 19 (12.5%) in the second attempt, and one catheter insertion required three attempts for insertion. The mean age of study participants was 43 years (±16.5), and males constituted 63% of the study cohort. Baseline laboratory characteristics of the two groups were comparable. The mean time of catheter insertion was 41.26 min (standard deviation [SD] 11.8) in group A and 47.74 min (SD 17.2) in group B (P = 0.007). The mean score of ease of catheter insertion, exit site bleed, infective and mechanical complications were not different between the two groups.

Conclusion

Our study concluded that fluoroscopy has no additional advantage in reducing mechanical, infective, or thrombotic complications. In experienced hands, USG-guided TDC insertion without fluoroscopy assistance is as good as the insertion done with fluoroscopy assistance, with a shorter procedure time.

MCV-UNet: a modified convolution & transformer hybrid encoder-decoder network with multi-scale information fusion for ultrasound image semantic segmentation

In recent years, the growing importance of accurate semantic segmentation in ultrasound images has led to numerous advances in deep learning-based techniques. In this article, we introduce a novel hybrid network that synergistically combines convolutional neural networks (CNN) and Vision Transformers (ViT) for ultrasound image semantic segmentation. Our primary contribution is the incorporation of multi-scale CNN in both the encoder and decoder stages, enhancing feature learning capabilities across multiple scales. Further, the bottleneck of the network leverages the ViT to capture long-range high-dimension spatial dependencies, a critical factor often overlooked in conventional CNN-based approaches. We conducted extensive experiments using a public benchmark ultrasound nerve segmentation dataset. Our proposed method was benchmarked against 17 existing baseline methods, and the results underscored its superiority, as it outperformed all competing methods including a 4.6% improvement of Dice compared against TransUNet, 13.0% improvement of Dice against Attention UNet, 10.5% improvement of precision compared against UNet. This research offers significant potential for real-world applications in medical imaging, demonstrating the power of blending CNN and ViT in a unified framework.

Inversion of Central Venous Ports in Children Under Six Years Old: A Retrospective Analysis of 154 Oncology Patients

Background Although some reports have evaluated the safety and efficacy of central venous port (CVP) placement in pediatric patients, the data about the inversion rate of the device and its risk factors are scarce. Therefore, this study aimed to evaluate the inversion rates of CVPs and their associated risk factors in pediatric patients. Methodology Between January 2010 and December 2021, 154 consecutive children (75 boys; median age, 28.5 months; range, 2-71 months) who underwent CVP placement at our center were included in this study. The primary outcome was the CVP inversion rate, and the secondary outcomes included technical success rate, intraoperative complications, and infectious complications. Intraoperative complications were evaluated according to the Society of Interventional Radiology guidelines. Patients under two years old were classified as the younger group and those aged ≥two years as the older group. Results The CVP inversion rate was 4.6% (n = 7/153), equivalent to 0.08 × 1,000 catheter-days. The inversion rate was significantly higher in the younger group (under two years old, 11.2%) than in the older group (≥two years old, 1.0%) according to the univariate analysis (p = 0.00576). The technical success rate was 99.4% (n = 153/154), and mild adverse events were observed during the procedure in three (1.9%) patients. Infectious complications were observed in 16 (10.5%) patients, equivalent to 0.19 × 1,000 catheter-days. Conclusions The CVP inversion rate was significantly higher in younger children (under two years old) than in older children (≥two years old).

Advantages of the use of ultrasound in newborn vascular access: a systematic review

Vascular access in neonates and small infants is often challenging. Ultrasound (US) screening and guidance improves its safety and efficacy. The advantages of a pre-implantation ultrasound examination are intuitive; it is a practical and safe technique that doesn't use radiation, allowing static and dynamic evaluations to be carried out and identifying anatomical variations, the caliber and depth of the vessel, the patency of the entire course and attached structures (nerves, etc.). Optimization of the image is a crucial aspect in achieving a clear view of all anatomical structures while avoiding complications. The goal of this review was to look into the benefits of using US in invasive catheter insertion procedures, especially in pediatric patients. Ultrasonography is used to visualize vessels and related structures in two dimensions (2D), sometimes with the help of color Doppler to detect the presence of intraluminal thrombi by applying gentle compression to assess vessel collapse and evaluate morphologic changes in the internal jugular vein (IJV) who had undergone central venous catheter (CVC) insertion during the neonatal period (Montes-Tapia et al. in J Pediatr Surg 51:1700-1703, 2016).

Complication Rates of Central Venous Catheters: A Systematic Review and Meta-Analysis

Importance

Central venous catheters (CVCs) are commonly used but are associated with complications. Quantifying complication rates is essential for guiding CVC utilization decisions.

Objective

To summarize current rates of CVC-associated complications.

Data Sources

MEDLINE, Embase, CINAHL, and CENTRAL databases were searched for observational studies and randomized clinical trials published between 2015 to 2023.

Study Selection

This study included English-language observational studies and randomized clinical trials of adult patients that reported complication rates of short-term centrally inserted CVCs and data for 1 or more outcomes of interest. Studies that evaluated long-term intravascular devices, focused on dialysis catheters not typically used for medication administration, or studied catheters placed by radiologists were excluded.

Data Extraction and Synthesis

Two reviewers independently extracted data and assessed risk of bias. Bayesian random-effects meta-analysis was applied to summarize event rates. Rates of placement complications (events/1000 catheters with 95% credible interval [CrI]) and use complications (events/1000 catheter-days with 95% CrI) were estimated.

Main Outcomes and Measures

Ten prespecified complications associated with CVC placement (placement failure, arterial puncture, arterial cannulation, pneumothorax, bleeding events requiring action, nerve injury, arteriovenous fistula, cardiac tamponade, arrhythmia, and delay of ≥1 hour in vasopressor administration) and 5 prespecified complications associated with CVC use (malfunction, infection, deep vein thrombosis [DVT], thrombophlebitis, and venous stenosis) were assessed. The composite of 4 serious complications (arterial cannulation, pneumothorax, infection, or DVT) after CVC exposure for 3 days was also assessed.

Results

Of 11 722 screened studies, 130 were included in the analyses. Seven of 15 prespecified complications were meta-analyzed. Placement failure occurred at 20.4 (95% CrI, 10.9-34.4) events per 1000 catheters placed. Other rates of CVC placement complications (per 1000 catheters) were arterial canulation (2.8; 95% CrI, 0.1-10), arterial puncture (16.2; 95% CrI, 11.5-22), and pneumothorax (4.4; 95% CrI, 2.7-6.5). Rates of CVC use complications (per 1000 catheter-days) were malfunction (5.5; 95% CrI, 0.6-38), infection (4.8; 95% CrI, 3.4-6.6), and DVT (2.7; 95% CrI, 1.0-6.2). It was estimated that 30.2 (95% CrI, 21.8-43.0) in 1000 patients with a CVC for 3 days would develop 1 or more serious complication (arterial cannulation, pneumothorax, infection, or DVT). Use of ultrasonography was associated with lower rates of arterial puncture (risk ratio [RR], 0.20; 95% CrI, 0.09-0.44; 13.5 events vs 68.8 events/1000 catheters) and pneumothorax (RR, 0.25; 95% CrI, 0.08-0.80; 2.4 events vs 9.9 events/1000 catheters).

Conclusions and Relevance

Approximately 3% of CVC placements were associated with major complications. Use of ultrasonography guidance may reduce specific risks including arterial puncture and pneumothorax.

Angiographic evidence of an inadvertent cannulation of the marginal sinus following central line migration: illustrative case

BACKGROUND

Central venous catheters (CVCs) play an indispensable role in clinical practice. Catheter malposition and tip migration can lead to severe complications. The authors present a case illustrating the endovascular management of inadvertent marginal sinus cannulation after an internal jugular vein (IJV) catheter tip migration.

OBSERVATIONS

A triple-lumen CVC was inserted without complications into the right IJV of a patient undergoing a repeat sternotomy for aortic valve replacement. Two weeks postinsertion, it was discovered that the tip had migrated superiorly, terminating below the torcula in the posterior fossa. In the interventional suite, a three-dimensional venogram confirmed the inadvertent marginal sinus cannulation. The catheter was carefully retracted to the sigmoid sinus to preserve the option of catheter exchange if embolization became necessary. After a subsequent venogram, which displayed an absence of contrast extravasation, the entire catheter was safely removed. The patient tolerated the procedure well.

LESSONS

Clinicians must be vigilant of catheter tip migration and malposition risks. Relying solely on postinsertion radiographs is insufficient. Once identified, prompt management of the malpositioned catheter is paramount in reducing morbidity and mortality and improving patient outcomes. Removing a malpositioned catheter constitutes a critical step, best performed by a specialized team under angiographic visualization.

Pitfalls in internal jugular vein cannulation

Central venous catheter insertion in the internal jugular vein (IJV) is frequently performed in acute care settings, facilitated by its easy availability and increased use of ultrasound in healthcare settings. Despite the increased safety profile and insertion convenience, it has complications. Herein, we aim to inform readers about the existing literature on the plethora of complications with potentially disastrous consequences for patients undergoing IJV cannulation.

Operator gender differences in major mechanical complications after central line insertions: a subgroup analysis of a prospective multicentre cohort study

BACKGROUND

A previous study on mechanical complications after central venous catheterisation demonstrated differences in complication rates between male and female operators. The objective of this subgroup analysis was to further investigate these differences. The hypothesis was that differences in distribution of predefined variables between operator genders could be identified.

METHODS

This was a subgroup analysis of a prospective, multicentre, observational cohort study conducted between March 2019 and December 2020 including 8 586 patients ≥ 16 years receiving central venous catheters at four emergency care hospitals. The main outcome measure was major mechanical complications defined as major bleeding, severe cardiac arrhythmia, pneumothorax, arterial catheterisation, and persistent nerve injury. Independent t-test and χ2 test were used to investigate differences in distribution of major mechanical complications and predefined variables between male and female operators. Multivariable logistic regression analysis was used to determine association between operator gender and major mechanical complications.

RESULTS

Female operators had a lower rate of major mechanical complications than male operators (0.4% vs 0.8%, P = .02), were less experienced (P < .001), had more patients with invasive positive pressure ventilation (P < .001), more often chose the internal jugular vein (P < .001) and more frequently used ultrasound guidance (P < .001). Male operators more often chose the subclavian vein (P < .001) and inserted more catheters with bore size ≥ 9 Fr (P < .001). Multivariable logistic regression analysis showed that male operator gender was associated with major mechanical complication (OR 2.67 [95% CI: 1.26-5.64]) after correction for other relevant independent variables.

CONCLUSIONS

The hypothesis was confirmed as differences in distribution of predefined variables between operator genders were found. Despite being less experienced, female operators had a lower rate of major mechanical complications. Furthermore, male operator gender was independently associated with a higher risk of major mechanical complications. Future studies are needed to further investigate differences in risk behaviour between male and female operators.

TRIAL REGISTRATION

Clinicaltrials.gov identifier: NCT03782324. Date of registration: 20/12/2018.

A Comparison of Techniques of Internal Jugular Vein Cannulation: Anatomical Landmark, Ultrasound Guided Pre-location, and Real-Time Ultrasound Guided

OBJECTIVE

The objective of our study is to compare the success rate, duration, and incidence of complications of a right internal jugular vein (IJV) cannulation by using three different techniques.

METHODOLOGY

A randomised controlled trial was conducted at a tertiary care teaching hospital. A total of 201 patients were randomly allocated to one of the following three groups (67 in each group). Techniques were categorised as anatomical landmark technique group (Group ALT), ultrasound guided pre-location group (Group USG-Pre), and real-time ultrasound-guided technique group (Group USG-RT).

INTERVENTIONS

Central venous catheter insertion via three techniques.

RESULTS

In 138 (73.01%) patients' IJV canulated in the first attempt, USG-RT, USG-Pre, and ALT were 51 (83.6%), 44 (72.1%), and 43 (64.2%), respectively. On the other hand, 37 (19.57%) patients were required in the second attempt, while only 14 (7.40%) patients were required in the third attempt for successful IJV cannulation. The success rates, as defined in our study, were only 138 (73%) as, in 51 (27%), we cannulated in more than a single attempt or switched to another technique. We found a significant difference in preparation time in all techniques as P-value <0.05, but no significant difference was found in venous access time, cannulation time, and duration of the procedure.

CONCLUSIONS

Any technique can be used for IJV cannulation, but the most acceptable is the real-time US technique. However, no difference in the overall procedure time among all three techniques was noted, and no major incidence of complication was found.

Role of point-of-care ultrasound in critical care and emergency medicine: update and future perspective

Point-of-care ultrasound (POCUS) is a rapidly developing technology that has the potential to revolutionize emergency and critical care medicine. The use of POCUS can improve patient care by providing real-time clinical information. However, appropriate usage and proper training are crucial to ensure patient safety and reliability. This article discusses the various applications of POCUS in emergency and critical care medicine, the importance of training and education, and the future of POCUS in medicine.

Ultrasound guidance practices used for the placement of vascular accesses in intensive care units: an observational multicentre study

BACKGROUND

Central catheters expose ICU patients at risk of catheter-related bloodstream infections. A mechanism by which these infections occur is the contamination of the catheter during its insertion if aseptic techniques are not strictly applied. Recent studies suggest that the use of ultrasound guidance (USG) may increase the risk of catheter contamination during insertion. We assessed current practices regarding the use of USG during catheter insertion, with a focus on identifying breaches of the surgical asepsis required for this invasive procedure.

METHODS

In 26 intensive care units, we evaluated the use of USG during catheter insertion, using a questionnaire addressed to intensivists and direct observation of their practices.

RESULTS

We analyzed 111 questionnaires and 36 observations of intensivists placing catheters. The questionnaires revealed that 88% of intensivists used USG for catheter insertion. Among those using USG, 56% had received specific training, 17% benefited from specific recommendations, 76% marked the insertion site before skin antisepsis, and during catheter insertion, 96% used sterile gel and 100% used a sterile sheath and sterile gloves. We identified potential deviations from strict aseptic technique, including contact between the sheath and the needle (19.4%), handling of the US system during catheter insertion (2.8%), and use of sterile devices, where they were not yet necessary (during the marking site or skin antisepsis), resulting in their contamination at the time of catheter insertion.

CONCLUSIONS

Interventions aimed at ensuring compliance with measures to prevent CRBs should be organized to prevent an increase in infections associated with US-guided catheter insertion.

Confidence and Utilization are Poorly Associated with Point-of-Care Ultrasound Competency among Internal Medicine Trainees

INTRODUCTION

Point-of-Care Ultrasound (POCUS) is the utilization of bedside ultrasound by clinicians. Its portable and rapid diagnostic capabilities make it an excellent tool for deployment and mobile military settings. However, formal and uniform POCUS training is lacking. Furthermore, the evaluation of these curricula often relies on confidence assessment. Our objective was to assess the relationships between confidence, frequency of utilization, and image interpretation knowledge among our Internal Medicine residents before and after the implementation of a formal curriculum.

MATERIALS AND METHODS

In November 2020, we implemented a longitudinal, flipped-classroom, academic half-day curriculum, conducting a prospective before-after cohort evaluation of its implementation. The POCUS curriculum was implemented as a longitudinal, asynchronous, flipped-classroom activity with workshop sessions during one academic half-day per month. We measured confidence via a Likert scale and utilization frequency via a five-point scale. Six multiple-choice questions (MCQ) with ultrasound videos assessed image interpretation competency. The image interpretation score was reported as percent correct. We related confidence and utilization to the image interpretation score.

RESULTS

Ninety-nine residents were eligible for participation. Fifty-four (55%) completed a pre-curriculum assessment and 45 (45%) completed a post-curriculum assessment. Average image interpretation scores were 41% pre-curriculum and 51% post-curriculum (P =0.02). Pre-curriculum residents were on average unconfident (mean=2.56), and post-curriculum residents were on average confident (mean=3.62). Pre-curriculum residents used POCUS occasionally (mean=2.02, count 13 (24%) never utilizing). Post-curriculum residents used POCUS occasionally (mean=2.42, count 4 (9%) never utilizing). Pre- and post-curriculum confidence were not significantly associated with image interpretation scores (pre-curriculum: r=-0.10, P =0.50; post-curriculum: r=0.24, P =0.11). Pre- and post-curriculum utilization were not significantly associated with image interpretation scores (pre-curriculum: r=0.15, P =0.28; post-curriculum: r=0.02, P =0.90). The number of curriculum sessions attended was significantly associated with higher image interpretation scores (r=0.30, P =0.003).

CONCLUSIONS

Our study suggests that POCUS confidence and informal utilization do not correlate with image interpretation knowledge on MCQs among Internal Medicine residents. These findings support assessing direct measures of knowledge, rather than confidence, as an endpoint in evaluating POCUS curricula among Internal Medicine residents.

Feasibility Analysis of Ultrasound-Guided Placement of Tunneled Hemodialysis Catheters

Introduction

Radiographic fluoroscopy is the current standard for placement of tunneled central venous catheters (CVCs) for hemodialysis. Radiographic fluoroscopy requires structural and personnel infrastructure and exposes the patient to ionizing radiation. Here, we investigate the feasibility of solely ultrasound-guided placement of tunneled central venous dialysis catheters (USCVCs).

Methods

We evaluated prospectively collected single-center data regarding safety and catheter function of 134 consecutive patients who underwent USCVC implantation between 2020 and 2021. We used the inset guidewire to visualize the position of the catheter tip. In the case of inadequate visibility by ultrasound, we used intracardiac electrocardiography (ECG) recording or agitated saline. A total of 1844 catheter days were assessed. The optimal CVC position was defined as being within the upper right atrium (URA) and middle to deep right atrium.

Results

Of the 134 USCVCs, 87% were placed on the right side. The primary success rate for optimal tip position and catheter function was 98%. Of the USCVCs, 97% were placed solely by ultrasound. Regarding positioning, 6% were in the vena cava superior zone, 70% in the URA and 24% in the middle to deep right atrium, resulting in a rate of 94% with optimal positioning. Effective blood flow averaged 292 ± 39 ml/min. There were no immediate procedure-associated complications.

Conclusion

Placement of CVC for hemodialysis solely by ultrasound is an effective alternative to fluoroscopy-assisted placement.

Improvement of central vein ultrasound-guided puncture success using a homemade needle guide-a simulation study

BACKGROUND

Out-of-plane (OOP) approach is frequently used for ultrasound-guided insertion of central venous catheter (CVC) owing to its simplicity but does not avoid mechanical complication. In-plane (IP) approach might improve safety of insertion; however, it is less easy to master. We assessed, a homemade needle guide device aimed to improve CVC insertion using IP approach.

METHOD

We evaluated in a randomized simulation trial, the impact of a homemade needle guide on internal jugular, subclavian and femoral vein puncture, using three approaches: out-of-plane free hand (OOP-FH), in-plane free hand (IP-FH), and in-plane needle guided (IP-NG). Success at first pass, the number of needle redirections and arterial punctures was recorded. Time elapsed (i) from skin contact to first skin puncture, (ii) from skin puncture to successful venous puncture and (iii) from skin contact to venous return were measured.

RESULTS

Thirty operators performed 270 punctures. IP-NG approach resulted in high success rate at first pass (jugular: 80%, subclavian: 95% and femoral: 100%) which was higher than success rate observed with OOP-FH and IP-FH regardless of the site (p = .01). Compared to IP-FH and OOP-FH, the IP-NG approach decreased the number of needle redirections at each site (p = .009) and arterial punctures (p = .001). Compared to IP-FH, the IP-NG approach decreased the total procedure duration for puncture at each site.

CONCLUSION

In this simulation study, IP approach using a homemade needle guide for ultrasound-guided central vein puncture improved success rate at first pass, reduced the number of punctures/redirections and shortened the procedure duration compared to OOP and IP free-hand approaches.

Single-plane versus real-time biplane approaches for ultrasound-guided central venous catheterization in critical care patients: a randomized controlled trial

BACKGROUND

Critical care patients often require central venous cannulation (CVC). We hypothesized that real-time biplane ultrasound-guided CVC would improve first-puncture success rate and reduce mechanical complications. The purpose of this study was to compare the success rate and safety of single-plane and real-time biplane approaches for ultrasound-guided CVC.

METHODS

From October 2022 to March 2023, 256 participants with critical illness requiring CVC were randomized to either the single-plane (n = 128) or biplane (n = 128) ultrasound-guided cannulation groups. The success rate, number of punctures, procedure duration, incidence of catheterization-related complications, and confidence score of operators were documented.

RESULTS

The central vein was successfully cannulated in all 256 participants (163 [64%] man and 93 [36%] women; mean age 69 ± 19 [range 13-104 years]), including 182 and 74 who underwent internal jugular vein cannulation (IJVC) and femoral vein cannulation (FVC), respectively. The incidence of successful puncture on the first attempt was higher in the biplane group than that in the single-plane group (91.6% vs. 74.7%; relative risk (RR), 1.226; 95% confidence interval (CI), 1.069-1.405; P = 0.002 for the IJVC and 90.9% vs. 68.3%; RR, 1.331; 95% CI, 1.053-1.684; P = 0.019 for the FVC). The biplane group was also associated with a higher first-puncture single-pass catheterization success rate (87.4% vs. 69.0% and 90.9% vs. 68.3%), fewer undesired punctures (1[1-1(1-2)] vs. 1[1-2(1-4)] and 1[1-1(1-3)] vs. 1[1-2(1-4)]), shorter cannulation time (205 s [162-283 (66-1,526)] vs. 311 s [243-401 (136-1,223)] and 228 s [193-306 (66-1,669)] vs. 340 s [246-499 (130-944)]), and fewer immediate complications (10.5% vs. 28.7% and 9.1% vs. 34.1%) for both IJVC and FVC (all P < 0.05).

CONCLUSION

Real-time biplane imaging of ultrasound-guided CVCs offers advantages over the single-plane approach for critically ill patients.

TRIAL REGISTRATION

This prospective RCT was registered at Chinese Clinical Trial Registry (ChiCTR2200064843). Registered 19 October 2022.

Inadvertent catheter misplacement into the subclavian artery during ultrasound-guided internal jugular venous catheterization: a case report

BACKGROUND

Ultrasound-guided central venous catheterization has become a standard procedure. However, mechanical complications are still reported.

CASE PRESENTATION

An 85-year-old woman presented with coagulopathic bladder tamponade. Ultrasound-guided right internal jugular venous catheterization was planned because of difficult peripheral venous access. A guidewire was advanced through a needle inserted at the midpoint of the right carotid triangle. The guidewire was identified in the short axis, but not in the long-axis ultrasound view, leading to inadvertent insertion of the catheter into the right subclavian artery through the internal jugular vein. Stent graft insertion was performed for perforation closure. The patient exhibited no symptoms of cerebral ischemia following stent graft insertion.

DISCUSSION

This case demonstrated that the needle-sticking site should not be placed close to the clavicle for ultrasound-guided internal jugular venous catheterization, as it may not confirm the position of guidewire in the long-axis ultrasound view.

Guidelines for Central Venous Port Placement and Management (Abridged Translation of the Japanese Version)

The central venous port has been widely used for patients who require long-term intravenous treatments, and the number of palcement has been increasing. The Japanese Society of Interventional Radiology developed a guideline for central venous port placement and management to provide evidence-based recommendations to support healthcare providers in the decision-making process regarding the central venous port. The guideline consisted of two parts: (i) a comprehensive review of topics including preoperative preparation, techniques for placement or removal, complications, and maintenance methods and (ii) recommendations for the six clinical questions regarding blood vessels for central venous port placement, port implantation site, prophylactic antibiotic therapy, imaging guidance for puncture, disinfectant prior to accessing the central venous port, and the optimal procedure at the end of drug administration via the central venous port, generated on the basis of the rating quality of evidence by systematic review.

Extracorporeal treatment for ethylene glycol poisoning: systematic review and recommendations from the EXTRIP workgroup

Ethylene glycol (EG) is metabolized into glycolate and oxalate and may cause metabolic acidemia, neurotoxicity, acute kidney injury (AKI), and death. Historically, treatment of EG toxicity included supportive care, correction of acid-base disturbances and antidotes (ethanol or fomepizole), and extracorporeal treatments (ECTRs), such as hemodialysis. With the wider availability of fomepizole, the indications for ECTRs in EG poisoning are debated. We conducted systematic reviews of the literature following published EXTRIP methods to determine the utility of ECTRs in the management of EG toxicity. The quality of the evidence and the strength of recommendations, either strong ("we recommend") or weak/conditional ("we suggest"), were graded according to the GRADE approach. A total of 226 articles met inclusion criteria. EG was assessed as dialyzable by intermittent hemodialysis (level of evidence = B) as was glycolate (Level of evidence = C). Clinical data were available for analysis on 446 patients, in whom overall mortality was 18.7%. In the subgroup of patients with a glycolate concentration ≤ 12 mmol/L (or anion gap ≤ 28 mmol/L), mortality was 3.6%; in this subgroup, outcomes in patients receiving ECTR were not better than in those who did not receive ECTR. The EXTRIP workgroup made the following recommendations for the use of ECTR in addition to supportive care over supportive care alone in the management of EG poisoning (very low quality of evidence for all recommendations): i) Suggest ECTR if fomepizole is used and EG concentration > 50 mmol/L OR osmol gap > 50; or ii) Recommend ECTR if ethanol is used and EG concentration > 50 mmol/L OR osmol gap > 50; or iii) Recommend ECTR if glycolate concentration is > 12 mmol/L or anion gap > 27 mmol/L; or iv) Suggest ECTR if glycolate concentration 8-12 mmol/L or anion gap 23-27 mmol/L; or v) Recommend ECTR if there are severe clinical features (coma, seizures, or AKI). In most settings, the workgroup recommends using intermittent hemodialysis over other ECTRs. If intermittent hemodialysis is not available, CKRT is recommended over other types of ECTR. Cessation of ECTR is recommended once the anion gap is < 18 mmol/L or suggested if EG concentration is < 4 mmol/L. The dosage of antidotes (fomepizole or ethanol) needs to be adjusted during ECTR.

Use of a Closure Device for the Management of Inadvertent Placement of a Central Venous Catheter in the Carotid Artery: A Case Report and Literature Review

The placement of a central venous catheter (CVC) is a common intervention in hospitalized patients. Several adverse events have been reported in this "blind" procedure when it is performed without the aid of ultrasound, including artery catheterization, which although uncommon, is a serious complication. Potential treatment options include manual compression, open surgical repair, and endovascular treatment. A 62-year-old critically ill patient with accidental arterial catheterization of the right common carotid artery (CCA) during placement of CVC is presented. The catheter was removed successfully with the use of a Perclose-ProGlide closure device. A systematic literature review was performed to identify similar cases treated with the same technique. This case presents an alternative minimally invasive treatment option, using a Perclose Proglide (Abbott) closure device for the removal of a misplaced CVC in the right CCA. Although this is an off-label use of the device it can be an effective alternative treatment option, especially in unstable patients.

Development and validation of a multivariable model predicting the required catheter dwell time among mechanically ventilated critically ill patients in three randomized trials

BACKGROUND

The anatomic site for central venous catheter insertion influences the risk of central venous catheter-related intravascular complications. We developed and validated a predictive score of required catheter dwell time to identify critically ill patients at higher risk of intravascular complications.

METHODS

We retrospectively conducted a cohort study from three multicenter randomized controlled trials enrolling consecutive patients requiring central venous catheterization. The primary outcome was the required catheter dwell time, defined as the period between the first catheter insertion and removal of the last catheter for absence of utility. Predictors were identified in the training cohort (3SITES trial; 2336 patients) through multivariable analyses based on the subdistribution hazard function accounting for death as a competing event. Internal validation was performed in the training cohort by 500 bootstraps to derive the CVC-IN score from robust risk factors. External validation of the CVC-IN score were performed in the testing cohort (CLEAN, and DRESSING2; 2371 patients).

RESULTS

The analysis was restricted to patients requiring mechanical ventilation to comply with model assumptions. Immunosuppression (2 points), high creatinine > 100 micromol/L (2 points), use of vasopressor (1 point), obesity (1 point) and older age (40-59, 1 point; ≥ 60, 2 points) were independently associated with the required catheter dwell time. At day 28, area under the ROC curve for the CVC-IN score was 0.69, 95% confidence interval (CI) [0.66-0.72] in the training cohort and 0.64, 95% CI [0.61-0.66] in the testing cohort. Patients with a CVC-IN score ≥ 4 in the overall cohort had a median required catheter dwell time of 24 days (versus 11 days for CVC-IN score < 4 points). The positive predictive value of a CVC-IN score ≥ 4 was 76.9% for > 7 days required catheter dwell time in the testing cohort.

CONCLUSION

The CVC-IN score, which can be used for the first catheter, had a modest ability to discriminate required catheter dwell time. Nevertheless, preference of the subclavian site may contribute to limit the risk of intravascular complications, in particular among ventilated patients with high CVC-IN score. Trials Registration NCT01479153, NCT01629550, NCT01189682.

Impact of central venous port implantation method and access choice on outcomes

BACKGROUND

Although the number of patients who need central venous ports for permanent vascular access is increasing, there is still no “gold standard” for the implantation technique.

AIM

To identify the implantation technique that should be favored.

METHODS

Two hundred central venous port-implanted patients in a tertiary hospital were retrospectively evaluated. Patients were assigned into two groups according to the access method. The first group comprised patients whose jugular veins were used, and the second group comprised patients whose subclavian veins were used. Groups were evaluated regarding age, sex, application side, primary diagnosis, active follow-up period in the hospital, chemotherapy agents administered, number of complications, and the Clavien-Dindo severity score. The distribution of the variables was tested with the Kolmogorov-Smirnov test and the Mann-Whitney U test. The χ² test was used to analyze the variables.

RESULTS

There was no statistically significant difference between the groups regarding age, sex, side, number of chemotherapy drugs, and duration of port usage (P > 0.05). Only 2 patients in group 1 had complications, whereas in group 2 we observed 19 patients with complications (P < 0.05). No port occlusion was found in group 1, but the catheters of 4 patients were occluded in group 2. One port was infected in group 1 compared to three infected ports in group 2. Two port ruptures, two pneumothorax, one revision due to a mechanical problem, one tachyarrhythmia during implantation, and four suture line problems were also recorded in group 2 patients. We also showed that it would be sufficient to evaluate and wash ports once every 2 mo.

CONCLUSION

Our results robustly confirm that the jugular vein route is safer than the subclavian vein approach for central venous port implantation.

Central catheter tip migration in critically ill patients

OBJECTIVES

Chest X-ray (CXR) is routinely required for assessing Central Venous Catheter (CVC) tip position after insertion, but there is limited data as to the movement of the tip location during hospitalization. We aimed to assess the migration of Central Venous Catheter (CVC) position, as a significant movement of catheter tip location may challenge some of the daily practice after insertion.

DESIGN AND SETTINGS

Retrospective, single-center study, conducted in the Intensive Care and Cardiovascular Intensive Care Units in Tel Aviv Sourasky Medical Center 'Ichilov', Israel, between January and June 2019.

PATIENTS

We identified 101 patients with a CVC in the Right Internal Jugular (RIJ) with at least two CXRs during hospitalization.

MEASUREMENTS AND RESULTS

For each patient, we measured the CVC tip position below the carina level in the first and all consecutive CXRs. The average initial tip position was 1.52 (±1.9) cm (mean±SD) below the carina. The maximal migration distance from the initial insertion position was 1.9 (±1) cm (mean±SD). During follow-up of 2 to 5 days, 92% of all subject's CVCs remained within the range of the Superior Vena Cava to the top of the right atrium, regardless of the initial positioning.

CONCLUSIONS

CVC tip position can migrate significantly during a patient's early hospitalization period regardless of primary location, although for most patients it will remain within a wide range of the top of the right atrium and the middle of the Superior Vena Cava (SVC), if accepted as well-positioned.

Ultrasound guidance versus landmark method for peripheral venous cannulation in adults

BACKGROUND

Peripheral intravenous cannulation is one of the most fundamental and common procedures in medicine. Securing a peripheral line is occasionally difficult with the landmark method. Ultrasound guidance has become a standard procedure for central venous cannulation, but its efficacy in achieving peripheral venous cannulation is unclear.

OBJECTIVES

To evaluate the effectiveness and safety of ultrasound guidance compared to the landmark method for peripheral intravenous cannulation in adults.  SEARCH METHODS: We used standard, extensive Cochrane search methods. The latest search date was 29 November 2021.

SELECTION CRITERIA

We included randomised controlled trials (RCTs) and quasi-RCTs (RCTs in which participants are systematically allocated based on data such as date of birth or recruitment) comparing the effects of ultrasound guidance to the landmark method for peripheral intravenous cannulation in adults.

DATA COLLECTION AND ANALYSIS

We used standard Cochrane methods. Our primary outcomes were first-pass success of cannulation, overall success of cannulation, and pain. Our secondary outcomes were procedure time for first-pass cannulation, procedure time for overall cannulation, number of attempts, patient satisfaction, and overall complications. We used GRADE to assess the certainty of the evidence.  Placing a peripheral intravenous line in individuals can be classed as 'difficult', 'moderate', or 'easy'. We use the terms 'difficult participants', 'moderate/moderately difficult participants' and 'easy participants' as shorthand to characterise the difficulty level in placing a peripheral line using the landmark method. We used the original studies' definitions of difficulty levels of peripheral intravenous cannulation with the landmark method. We analysed the results in these subgroups: 'difficult participants', 'moderate participants', and 'easy participants'. We did this because we expected the effect of ultrasound-guided peripheral venous cannulation to be largest in participants classed as 'difficult' and smaller in participants classed as 'moderate' and 'easy'.  MAIN RESULTS: We included 14 RCTs and two quasi-RCTs involving 2267 participants undergoing peripheral intravenous cannulation. Participants were classed as 'difficult' in 12 studies (880 participants), 'moderate' in one study (401 participants), and 'easy' in one study (596 participants). Two studies (390 participants) did not restrict by landmark method difficulty level. The overall risk of bias assessments ranged from low to high. We judged studies to be at high risk of bias mainly because of concerns about blinding for subjective outcomes. In difficult participants, ultrasound guidance increased the first-pass success of cannulation (risk ratio (RR) 1.50, 95% confidence interval (95% CI) 1.15 to 1.95; 10 studies, 815 participants; low-certainty evidence), and the overall success of cannulation (RR 1.40, 95% CI 1.10 to 1.77; 10 studies, 670 participants; very low-certainty evidence). There was no clear difference in pain (mean difference (MD) -0.20, 95% CI -1.13 to 0.72; 4 studies, 323 participants; very low-certainty evidence; numerical rating scale (NRS) 0 to 10 where 10 is maximum pain). Ultrasound guidance increased the procedure time for first-pass cannulation (MD 119.9 seconds, 95% CI 88.6 to 151.1; 2 studies, 219 participants; low-certainty evidence), and patient satisfaction (standardised mean difference (SMD) 0.49, 95% CI 0.07 to 0.92; 5 studies, 333 participants; very low-certainty evidence; NRS 0 to 10 where 10 is maximum satisfaction). Ultrasound guidance decreased the number of cannulation attempts (MD -0.33, 95% CI -0.64 to -0.02; 9 studies, 568 participants; very low-certainty evidence). Ultrasound guidance showed no clear difference in the procedure time for overall cannulation (MD -24.9 seconds, 95% CI -323.1 to 273.3; 8 studies, 413 participants; very low-certainty evidence) and overall complications (RR 0.64, 95% CI 0.37 to 1.10; 5 studies, 431 participants; low-certainty evidence).  In moderate participants, ultrasound guidance increased the first-pass success of cannulation (RR 1.14, 95% CI 1.02 to 1.27; 1 study, 401 participants; moderate-certainty evidence). No studies assessed the overall success of cannulation. There was no clear difference in pain (MD 0.10, 95% CI -0.47 to 0.67; 1 study, 401 participants; low-certainty evidence; NRS 0 to 10 where 10 is maximum pain). Ultrasound guidance increased the procedure time for first-pass cannulation (MD 95.2 seconds, 95% CI 72.8 to 117.6; 1 study, 401 participants; high-certainty evidence). Ultrasound guidance showed no clear difference in overall complications (RR 0.83, 95% CI 0.38 to 1.82; 1 study, 401 participants; moderate-certainty evidence). No studies assessed the procedure time for overall cannulation, number of cannulation attempts, or patient satisfaction.  In easy participants, ultrasound guidance decreased the first-pass success of cannulation (RR 0.89, 95% CI 0.85 to 0.94; 1 study, 596 participants; high-certainty evidence). No studies assessed the overall success of cannulation. Ultrasound guidance increased pain (MD 0.60, 95% CI 0.17 to 1.03; 1 study, 596 participants; moderate-certainty evidence; NRS 0 to 10 where 10 is maximum pain). Ultrasound guidance increased the procedure time for first-pass cannulation (MD 94.8 seconds, 95% CI 81.2 to 108.5; 1 study, 596 participants; high-certainty evidence). Ultrasound guidance showed no clear difference in overall complications (RR 2.48, 95% CI 0.90 to 6.87; 1 study, 596 participants; moderate-certainty evidence). No studies assessed the procedure time for overall cannulation, number of cannulation attempts, or patient satisfaction.  AUTHORS' CONCLUSIONS: There is very low- and low-certainty evidence that, compared to the landmark method, ultrasound guidance may benefit difficult participants for increased first-pass and overall success of cannulation, with no difference detected in pain. There is moderate- and low-certainty evidence that, compared to the landmark method, ultrasound guidance may benefit moderately difficult participants due to a small increased first-pass success of cannulation with no difference detected in pain. There is moderate- and high-certainty evidence that, compared to the landmark method, ultrasound guidance does not benefit easy participants: ultrasound guidance decreased the first-pass success of cannulation with no difference detected in overall success of cannulation and increased pain.

Incidence of catheter-related bloodstream infections following ultrasound-guided central venous catheterization: a systematic review and meta-analysis

Background

Ultrasonographic guidance is widely used for central venous catheterization. Several studies have revealed that ultrasound-guided central venous catheterization increases the rate of success during the first attempt and reduces the procedural duration when compared to the anatomical landmark-guided insertion technique, which could result in protection from infectious complications. However, the effect of ultrasound-guided central venous catheterization on catheter-related bloodstream infections remains unclear. We aimed to conduct a systematic review and meta-analysis to evaluate the value of ultrasound guidance in preventing catheter-related bloodstream infections and catheter colonization associated with central venous catheterization.

Methods

The Cochrane Central Register of Controlled Trials (CENTRAL) and MEDLINE (via PubMed) were searched up to May 9, 2022 for randomized controlled trials (RCTs) comparing ultrasound-guided and anatomical landmark-guided insertion techniques for central venous catheterization. Risk of bias was assessed using the Cochrane Risk of Bias 2 (RoB 2) tool for RCTs. A meta-analysis was performed for catheter-related bloodstream infections and catheter colonization, as primary and secondary outcomes, respectively.

Results

Four RCTs involving 1268 patients met the inclusion criteria and were analyzed. Ultrasound-guided central venous catheterization was associated with a slightly lower incidence of catheter-related bloodstream infections (risk ratio, 0.46; 95% confidence interval [CI], 0.16–1.32) and was not associated with a lower incidence of catheter colonization (risk ratio, 1.36; 95% CI, 0.57–3.26).

Conclusion

Ultrasound-guided central venous catheterization might reduce the incidence of catheter-related bloodstream infections. Additional RCTs are necessary to further evaluate the value of ultrasound guidance in preventing catheter-related bloodstream infections with central venous catheterization.

Supplementary Information

The online version contains supplementary material available at 10.1186/s12879-022-07760-1.

Competencies for Point-of-care Ultrasonography in ICU: An ISCCM Expert Panel Practice Recommendation

How to cite this article: Srinivasan S, Kumar PG, Govil D, Gupta S, Kumar V, Pichamuthu K, et al. Competencies for Point-of-care Ultrasonography in ICU: An ISCCM Expert Panel Practice Recommendation. Indian J Crit Care Med 2022;26(S2):S7-S12.

Development and validation of a prediction model of catheter-related thrombosis in patients with cancer undergoing chemotherapy based on ultrasonography results and clinical information

Central venous catheters can be used conveniently to deliver medications and improve comfort in patients with cancer. However, they can cause major complications. The current study aimed to develop and validate an individualized nomogram for early prediction of the risk of catheter-related thrombosis (CRT) in patients with cancer receiving chemotherapy. In total, 647 patients were included in the analysis. They were randomly assigned to the training (n = 431) and validation (n = 216) cohorts. A nomogram for predicting the risk of CRT in the training cohort was developed based on logistic regression analysis results. The accuracy and discriminatory ability of the model were determined using area under the receiver operating characteristic curve (AUROC) values and calibration plots. Multivariate logistic regression analysis showed that body mass index, risk of cancer-related thrombosis, D-dimer level, and blood flow velocity were independent risk factors of CRT. The calibration plot showed an acceptable agreement between the predicted and actual probabilities of CRT. The AUROC values of the nomogram were 0.757 (95% confidence interval: 0.717-0.809) and 0.761 (95% confidence interval: 0.701-0.821) for the training and validation cohorts, respectively. Our model presents a novel, user-friendly tool for predicting the risk of CRT in patients with cancer receiving chemotherapy. Moreover, it can contribute to clinical decision-making.

Factors affecting mechanical complications of central venous access devices in children

PURPOSE

Factors leading to mechanical complications following insertion of central venous access devices (CVADs) in children are poorly understood. We aimed to quantify the rates and elucidate the mechanisms of these complications.

METHODS

Retrospective (2016-2021) review of children (< 18 years old) receiving a CVAD. Data, reported as number of cases (%) and median (IQR), were analysed by Fisher's exact test, chi-squared test and logistic regression analysis.

RESULTS

In total, 317 CVADs (245 children) were inserted. Median age was 5.0 (8.9) years, with 116 (47%) females. There were 226 (71%) implantable port devices and 91 (29%) Hickman lines. Overall, 54 (17%) lines had a mechanical complication after 0.4 (0.83) years from insertion: fracture 19 (6%), CVAD migration 14 (4.4%), occlusion 14 (4.4%), port displacement 6 (1.9%), and skin tethering to port device 1 (0.3%). Younger age and lower weight were associated with higher risk of complications (p < 0.0001). Hickman lines had a higher incidence of complications compared to implantable port devices [24/91 (26.3%) vs 30/226 (13.3%); p = 0.008].

CONCLUSION

Mechanical complications occur in 17% of CVADs at a median of < 6 months after insertion. Risk factors include younger age and lower weight. Implantable port devices have a lower complications rate.

LEVEL OF EVIDENCE

Level 4: case-series with no comparison group.

Percutaneous closure of accidentally subclavian artery catheterization: time to change first line approach?

PURPOSE

To present our experience and provide a literature review dissertation about the use of a suture-mediated percutaneous closure device (Perclose Proglide -PP- Abbott Vascular Inc., Santa Clara, CA, USA) to achieve hemostasis for unintended subclavian arterial catheterization during central venous line placement.

MATERIALS & METHODS

Since October 2020, we have successfully treated four consecutive patients with a central venous catheter (8 to 12 French) in the subclavian artery. In each patient, we released a PP, monitoring its efficacy by performing a subclavian angiogram and placing, as a rescue strategy, an 8 mm balloon catheter near the entry point of the misplaced catheter. Primary outcome is technical and clinical success. Technical success is defined as absence of bleeding signs at completion angiography, while clinical success is a composite endpoint defined as absence of hematoma, hemoglobin loss at 12 and 24 h, and absence of procedure-related reintervention (due to vessel stenosis, pseudoaneurysm or distal embolization).

RESULTS

Technical success was obtained in 75% of cases. In one patient a mild extravasation was resolved after 3 min of balloon catheter inflation. No early complications were observed for all patients.

CONCLUSIONS

PP showed a safe and effective therapeutic option in case of unintentional arterial cannulation. It can be considered as first-line strategy, as it does not preclude the possibility to use other endovascular approaches in case of vascular closure device failure.

Ministernotomy repair of inadvertent proximal right subclavian artery injury following right internal jugular central venous catheter insertion

A man in his 60s was referred for urgent coronary artery bypass grafting (CABG) procedure following acute coronary syndrome. After induction of general anaesthesia, right jugular venous catheterisation under two-dimensional ultrasound guidance was planned as part of perioperative management. While obtaining vascular access, the pulsatile flow was noted once the dilator was inserted, having to abandon the procedure and immediately apply manual pressure. CT angiogram showed proximal right subclavian artery injury with active contrast extravasation and resultant large haematoma in the neck. The patient underwent urgent exploration of the injured vessel through a J-shaped ministernotomy, and primary repair of the artery was performed. The patient recovered from the procedure without any complications. He continued to stay in the hospital for a few days, afterwards, he underwent the initially planned CABG surgery. He was discharged home on day 5 after surgery without further concerns.

Ultrasound-Guided Right Internal Jugular Vein Cannulation by Operators of Different Experience: A Randomized, Pilot Study

BACKGROUND AND AIM

Currently, ultrasound-guided (US-guided) internal jugular vein (IJV) cannulation is the recommended technique. However, it has a learning curve and might be unsafe in inexperienced hands. The present study aimed to compare the performance and complications with two levels of experience in performing US-guided right IJV cannulation.

METHODS

With informed consent, 108 procedures were performed after random allocation into two groups based on operator experience. An operator with experience in performing 30 or more ultrasound-guided IJV cannulation was considered an expert. The rate of successful cannulation, the time needed, number of attempts, and complication rate were measured. Quantitative continuous variables were compared using the unpaired student's t-test, and the chi-square test or Fisher's-exact test was used for the comparison of qualitative variables; P-value < 0.05 was considered significant.

RESULTS

The successful cannulation rates were 100% versus 94.44% in the expert and non-expert groups, respectively; (P=0.0803). The mean time for successful cannulation and the percentage of patients who required ≥ two attempts were significantly lower in the expert group (33.28 seconds and 12.96% versus 95.42 seconds and 61.12%). Although the incidence of carotid artery puncture and hematoma (7.4% and 5.56%) was higher in the non-expert group, it was not statistically different; (P=1.00).

CONCLUSION

US-guided right IJV cannulation has a learning curve, and procedures as many as 30 US-guided IJV cannulation need to be observed and performed under the guidance to achieve it.

Evaluation of the ideal length of the Seldinger needle for internal jugular vein catheter placement

Placement of central venous catheters (CVC) into the internal jugular vein represents a routine clinical intervention. The periprocedural complication rate ranges from 5 to 20% and can be reduced by ultrasound guidance, training of residents and other measures. We aimed to proof that the average Seldinger needle is too long, increasing the risk of periprocedural injury, best epitomized in the stellate ganglion injury/irritation. The first part of the study was an online market analysis to investigate the standard needle length currently offered as part of the CVC placement sets. The second part of the study involved 35 hospitalized patients (14 female; median age 74.5 years). In those the distance between the skin and the internal jugular vein as well as the diameter of the internal jugular vein was measured by ultrasound in both, supine position as well as 45° semi-sitting position. In the third part of the study 80 body donors (45 female; median age 83.0 years) preserved by the ethanol/formaldehyde method were studied. In those the distance and angle between the typical landmark for insertion of the Seldinger needle for internal jugular vein catheter placement to the stellate ganglion was measured. The median [interquartile range] Seldinger needle length was 7 [4.0–10.0] cm. In the examined patients the maximum distance between the skin and the internal jugular vein was 1.87 cm. The minimum distance was 0.46 cm and the median distance averaging supine and 45° position was 1.14 [0.94–1.31] cm. Regarding the body donors the median distance from the insertion point of the internal jugular vein to the stellate ganglion was longer in men 5.5 [4.95–6.35] cm than in women 5.2 [4.7–5.9] (p = 0.031 unpaired t-test). With 7 cm average length the Seldinger needle currently sold as part of CVC sets is long enough to physically reach the stellate ganglion, not to mention more proximal structures. A shorter needle length would be sufficient to reach the internal jugular vein even in obese patients and with a small insertion angle while minimizing the possibility to cause severe injury as structures like the pleura and the stellate ganglion could not be reached by shorter needles.

Ultrasonographic evaluation of deep vein thrombosis related to the central catheter in hemodialytic patients

BACKGROUND

Point of care ultrasound (PoCUS) is a useful tool for the early diagnosis of thrombosis related to the central venous catheter for dialysis (TR-CVCd). However, the application of PoCUS is still not common as a bedside imaging examination and TR-CVCd remains often underdiagnosed in the routine practice. The aim of this study was to investigate if a compression technique for the diagnosis of TR-CVCd blindly performed by PoCUS experts and medical students is accurate when compared to a Doppler study.

METHODS

Two medical students without prior knowledge in PoCUS received a short theoretical-practical training to evaluate TR-CVCd of the internal jugular vein by means of the ultrasound compression technique. After the training phase, patients with central venous catheter for dialysis (CVCd) were evaluated by the students in a private hemodialysis clinic. The results were compared to those obtained on the same population by doctors with solid experience in PoCUS, using both the compression technique and the color Doppler.

RESULTS

Eighty-one patients were eligible for the study and the prevalence of TR-CVCd diagnosed by Doppler was 28.4%. The compression technique performed by the students and by experts presented, respectively, a sensitivity of 59.2% (CI 51.6-66.8) vs 100% and a specificity of 89.6% (CI 84.9-94.3) vs 94.8% (CI 91.4-98.2).

CONCLUSION

The compression technique in the hands of PoCUS experts demonstrated high accuracy in the diagnosis of TR-CVCd and should represent a standard in the routine examination of dialytic patients. The training of PoCUS inexperienced students for the diagnosis of TR-CVCd is feasible but did not lead to a sufficient level of sensitivity.

Towards a First-Person Perspective Mixed Reality Guidance System for Needle Interventions

While ultrasound (US) guidance has been used during central venous catheterization to reduce complications, including the puncturing of arteries, the rate of such problems remains non-negligible. To further reduce complication rates, mixed-reality systems have been proposed as part of the user interface for such procedures. We demonstrate the use of a surgical navigation system that renders a calibrated US image, and the needle and its trajectory, in a common frame of reference. We compare the effectiveness of this system, whereby images are rendered on a planar monitor and within a head-mounted display (HMD), to the standard-of-care US-only approach, via a phantom-based user study that recruited 31 expert clinicians and 20 medical students. These users performed needle-insertions into a phantom under the three modes of visualization. The success rates were significantly improved under HMD-guidance as compared to US-guidance, for both expert clinicians (94% vs. 70%) and medical students (70% vs. 25%). Users more consistently positioned their needle closer to the center of the vessel's lumen under HMD-guidance compared to US-guidance. The performance of the clinicians when interacting with this monitor system was comparable to using US-only guidance, with no significant difference being observed across any metrics. The results suggest that the use of an HMD to align the clinician's visual and motor fields promotes successful needle guidance, highlighting the importance of continued HMD-guidance research.

Ultrasound-Guided Peripherally Inserted Central Catheter Placement in Extremely Low Birth Weight Neonates

Extremely low birth weight (ELBW), <1,000 g, neonates require central venous access for their growth, development, and survival. Peripherally inserted central catheters (PICCs) provide such access and reduce the risks associated with other types of central venous catheters. While the use of ultrasound (US) to guide PICC placement further reduces these risks, this technology has not been integrated into neonatal practice. The purpose of this case study is to describe US-guided PICC placement in 2 ELBW neonates. PICCs were placed in 2 patients weighing 505 g and 800 g, respectively, utilizing US guidance where the practitioner was unable to identify veins using traditional methods (e.g., palpation, landmarks, transillumination, or infrared device). PICC placement utilizing US guidance in ELBW neonates is a safe and effective technique that improves outcomes, prevents complications, and promotes vessel preservation in this vulnerable population. It is essential that this technique is integrated into neonatal practice.

Point-of-Care Ultrasound-Guided Protocol to Confirm Central Venous Catheter Placement in Pediatric Patients Undergoing Cardiothoracic Surgery: A Prospective Feasibility Study

Background: Central venous catheters (CVC) are commonly required for pediatric congenital cardiac surgeries. The current standard for verification of CVC positioning following perioperative insertion is postsurgical radiography. However, incorrect positioning may induce serious complications, including pleural and pericardial effusion, arrhythmias, valvular damage, or incorrect drug release, and point of care diagnostic may prevent these serious consequences. Furthermore, pediatric patients with congenital heart disease receive various radiological procedures. Although relatively low, radiation exposure accumulates over the lifetime, potentially reaching high carcinogenic values in pediatric patients with chronic disease, and therefore needs to be limited. We hypothesized that correct CVC positioning in pediatric patients can be performed quickly and safely by point-of-care ultrasound diagnostic. Methods: We evaluated a point-of-care ultrasound protocol, consistent with the combination of parasternal craniocaudal, parasternal transversal, suprasternal notch, and subcostal probe positions, to verify tip positioning in any of the evaluated views at initial CVC placement in pediatric patients undergoing cardiothoracic surgery for congenital heart disease. Results: Using the combination of the four views, the CVC tip could be identified and positioned in 25 of 27 examinations (92.6%). Correct positioning was confirmed via chest X-ray after the surgery in all cases. Conclusions: In pediatric cardiac patients, point-of-care ultrasound diagnostic may be effective to confirm CVC positioning following initial placement and to reduce radiation exposure.

Safety in training for ultrasound guided internal jugular vein CVC placement: a propensity score analysis

Background

Central venous catheter (CVC) placement is a routine procedure but is potentially associated with severe complications. Relatively small studies investigated if the use of ultrasound is effective in bridging the skill gap between proficient and not proficient operators, while patient safety during training remains a controversial topic. The first aim of this study was to evaluate if resident proficiency affects the failure rate in CVC positioning under ultrasound guidance. In addition, it aimed to investigate the different rate of complications between proficient and non proficient residents.

Methods

We conducted a cohort study including CVC placed by residents at the University Hospital of Padova, from November 1, 2012 to July 9, 2020 comparing proficient and non proficient residents. To avoid bias the two cohorts were matched using propensity score.

Results

A total of 356 residents positioned 2310 CVC during the 8 year study period. Among them, two groups of 1060 CVCs each were matched with a propensity score analysis. There was no difference in the failure rate among the groups (2.8 vs 2.7%, p-value 0.895).

Moreover, cohorts had the same rate of hematomas, catheter tip malposition, arterial puncture and pneumothorax. No cases of hemothorax were reported.

Conclusions

We found the same rate of success and incidence of adverse complications among cohorts, meaning that the process of skill acquisition is safe as long as appropriate training and direct supervision by a senior consultant are available.

Number Needed to Scan: Evidence-Based Point-of-Care Ultrasound (POCUS)

Interest and enthusiasm, regarding the use of point-of-care ultrasound (POCUS), continues to grow among clinicians in multiple medical specialties. Ultrasound machines technology has advanced to allow for smaller, even handheld machines. Integration of automated imaging technology has made these machines more user-friendly. However, one of the concerns with the widespread availability of POCUS is the overuse and misuse of this technology. In order to maximize the clinical impact of POCUS, this manuscript seeks to discuss a novel concept called the “Number needed to scan” (NNS). The NNS is an expression of the number of POCUS examinations needed to be performed to attain a benefit to the patient or to prevent an adverse outcome of a procedure. NNS serves a dual purpose: it can help clinicians understand the magnitude of clinical impact when they apply POCUS, and it can help clinicians explain this magnitude in layman terms to their patients. In this manuscript, we have focused our NNS calculations on landmark articles in three major categories: change in management; safety and accuracy; and catching a missed diagnosis. As clinicians seek to be good stewards of POCUS, NNS should be a concept used to consider which patients will be most likely to benefit from a clinician performed ultrasound.