Peter J. Carr

Insertion of peripheral intravenous cannulae in the Emergency Department: factors associated with first-time insertion success

Background We sought to identify the reasons for peripheral intravenous cannulae insertion in the emergency department (ED), and the first-time insertion success rate, along with patient and clinician factors influencing this phenomenon. Methods A prospective cohort study of patients requiring peripheral cannulae insertion in a tertiary ED. Clinical and clinician data were obtained. Results A total 734 peripheral intravenous cannula (PIVC) insertions were included in the study where 460 insertions were analysed. The first-time insertion success incidence was 86%. The antecubital fossa (ACF) site accounted for over 50% of insertions. Multivariate logistic regression modelling to predict first-time insertion success for patient factors found: age <40 versus 80+ years, emaciated versus normal patient size, having a visible or palpable vein/s, and ACF versus forearm insertion site to be statistically significant. Statistically significant clinician factors predicting success were: higher number of prior cannulation procedures performed, and increased clinician perception of the likelihood of a successful insertion. When patient and clinician factors were combined in a logistic regression model, emaciated versus normal, visible vein/s, ACF versus forearm site, higher number of prior PIVC procedures performed and increased clinician perceived likelihood of success were statistically associated with first-time insertion success. Conclusions Peripheral intravenous cannulation insertion success could be improved if performed by clinicians with greater procedural experience and increased perception of the likelihood of success. Some patient factors predict cannulation success: ‘normal’ body weight, visible vein/s and cubital fossa placement; venepuncture may be a cheaper alternative for others if intravenous therapy is not imperative.

Peripheral intravenous cannulation: complication rates in the neonatal population: a multicenter observational study

Introduction Neonates admitted to a neonatal intensive care unit (NICU) rely highly on intravenous (IV) therapy, for which the peripheral intravenous cannula (PIVC) is the preferred device to allow such therapies to proceed. Placement of a PIVC is a painful procedure and repeated attempts for successful insertion should therefore be limited. We aimed to quantify the incidence, complications, and factors associated with these complications. Methods We conducted a prospective observational study to examine PIVC-related complications in level III NICUs of two university medical centers (UMC) in The Netherlands. We performed descriptive analyses and binary logistic regression analysis to identify factors associated with PIVC complications. Results A total of 518 catheters were inserted in 235 infants. The first-time success rate was 45%. The predominant reason for non-elective removal due to complications was infiltration (N = 193; 67%). No significant association was found between discipline of the inserter, vein visualization device and location of the PIVC and whether or not a catheter needed to be removed due to a complication. Conclusions In this study the majority of PIVCs were removed after the occurrence of a complication. The most common complication was infiltration. Strategies to identify and prevent infiltration in an NICU population are required. Future interventional studies should attempt to improve first-time insertion success and reduce PIVC failure from infiltration in the neonate. Based on the results of the present study, neonatologists and physician assistants are the preferential PIVC inserters. Advanced training of all members of vascular access specialist teams and ongoing monitoring of PIVC-related complications are recommended.

Predicting and preventing peripheral intravenous cannula insertion failure in the emergency department: Clinician ‘gestalt’ wins again

Failed attempts at peripheral i.v. cannula (PIVC) insertion in the ED are common. The psychological, physical and economic impact of these failures is significant. We sought to explore whether clinicians of differing experience levels can predict their own likelihood (clinician ‘gestalt’) of first‐time cannula insertion success on any given patient.

Development of a clinical prediction rule to improve peripheral intravenous cannulae first attempt success in the emergency department and reduce post insertion failure rates: the Vascular Access Decisions in the Emergency Room (VADER) study protocol.

Introduction Peripheral intravenous cannula (PIVC) insertion is one of the most common clinical interventions performed in emergency care worldwide. However, factors associated with successful PIVC placement and maintenance are not well understood. This study seeks to determine the predictors of first time PIVC insertion success in emergency department (ED) and identify the rationale for removal of the ED inserted PIVC in patients admitted to the hospital ward. Reducing failed insertion attempts and improving peripheral intravenous cannulation practice could lead to better staff and patient experiences, as well as improving hospital efficiency. Methods and analysis We propose an observational cohort study of PIVC insertions in a patient population presenting to ED, with follow-up observation of the PIVC in subsequent admissions to the hospital ward. We will collect specific PIVC observational data such as; clinician factors, patient factors, device information and clinical practice variables. Trained researchers will gather ED PIVC insertion data to identify predictors of insertion success. In those admitted from the ED, we will determine the dwell time of the ED-inserted PIVC. Multivariate regression analyses will be used to identify factors associated with insertions success and PIVC failure and standard statistical validation techniques will be used to create and assess the effectiveness of a clinical predication rule. Ethics and dissemination The findings of our study will provide new evidence to improve insertion success rates in the ED setting and identify strategies to reduce premature device failure for patients admitted to hospital wards. Results will unravel a complexity of factors that contribute to unsuccessful PIVC attempts such as patient and clinician factors along with the products, technologies and infusates used. Trial registration number ACTRN12615000588594; Pre-results.

An affordable and easily constructed model for training in ultrasound-guided vascular access.

Purpose This paper describes a simple and inexpensive method to make high-fidelity simulators for use in ultrasound-guided vascular access teaching. The phantoms can be created to reflect the ultrasound appearance and feel of central or peripheral arteries and veins. Different clinical states such as hypovolaemia may be readily displayed using the phantoms. Methods The article and associated videos describe the production, appearance and use of phantoms for central vascular access, for peripheral venous access and for peripheral arterial access. Key ingredients are readily accessible and include chicken breasts, modelling balloons and thin walled latex or silicone tubing. Results The phantoms are easily and rapidly constructed and may be used repeatedly in a training session. As the needle passes through the phantom and vessel wall, the ultrasound appearance and tactile sensation is very similar to that of human tissue and vessels. Conclusions Using this method, simple and inexpensive phantoms can be created. These are ideal for use in training for ultrasound-guided vascular access. Links to videos describing the phantom construction process, their appearance and the teaching techniques utilised by the authors are found in the text.

Upper extremity deep vein thrombosis: a complication of an indwelling peripherally inserted central venous catheter

We report a case of peripherally inserted central venous catheter (PICC)‐associated deep vein thrombosis (DVT). Ultrasound images and video of subclavian thrombus are presented. PICC line‐associated DVT, particularly in cancer patients is not uncommon. Point‐of‐care Emergency Department ultrasound can readily diagnose this complication and device removal is not always necessary.

The mechanistic causes of peripheral intravenous catheter failure based on a parametric computational study

Peripheral intravenous catheters (PIVCs) are the most commonly used invasive medical device, yet up to 50% fail. Many pathways to failure are mechanistic and related to fluid mechanics, thus can be investigated using computational fluid dynamics (CFD). Here we used CFD to investigate typical PIVC parameters (infusion rate, catheter size, insertion angle and tip position) and report the hemodynamic environment (wall shear stress (WSS), blood damage, particle residence time and venous stasis volumes) within the vein and catheter, and show the effect of each PIVC parameter on each hemodynamic measure. Catheter infusion rate has the greatest impact on our measures, with catheter orientation also playing a significant role. In some PIVC configurations WSS was 3254 times higher than the patent vein, and blood damage was 512 times greater, when compared to control conditions. Residence time is geometry-dependent and decreases exponentially with increasing insertion angle. Stasis volume decreased with increasing infusion rate and, to a lesser degree, insertion angle. Even without infusion, the presence of the catheter changes the flow field, causing low velocity recirculation at the catheter tip. This research demonstrates how several controllable factors impact important mechanisms of PIVC failure. These data, the first of their kind, suggest limiting excessive infusion rates in PIVC.

Use of Short Peripheral Intravenous Catheters: Characteristics, Management, and Outcomes Worldwide

BACKGROUND Peripheral intravenous catheter (PIVC) use in health care is common worldwide. Failure of PIVCs is also common, resulting in premature removal and replacement. OBJECTIVE To investigate the characteristics, management practices, and outcomes of PIVCs internationally. DESIGN SETTING/PATIENTS Cross-sectional study. Hospitalized patients from rural, regional, and metropolitan areas internationally. MEASUREMENTS Hospital, device, and inserter characteristics were collected along with assessment of the catheter insertion site. PIVC use in different geographic regions was compared. RESULTS We reviewed 40,620 PIVCs in 51 countries. PIVCs were used primarily for intravenous medication (n = 28,571, 70%) and predominantly inserted in general wards (n = 22,167, 55%). Two-thirds of all devices were placed in non-recommended sites such as the hand, wrist, or antecubital veins. Nurses inserted most PIVCs (n = 28,575, 71%); although there was wide regional variation (26% to 97%). The prevalence of iIn this study, we found that many PIVCs were placed in areas of flexion, were symptomatic or idle, had suboptimal dressings, or lacked adequate documentation. This suggests inconsistency between recommended management guidelines for PIVCs and current practice.dle PIVCs was 14% (n = 5,796). Overall, 10% (n = 4,204) of PIVCs were painful to the patient or otherwise symptomatic of phlebitis; a further 10% (n = 3,879) had signs of PIVC malfunction; and 21% of PIVC dressings were suboptimal (n = 8,507). Over one-third of PIVCs (n = 14,787, 36%) had no documented daily site assessment and half (n = 19,768, 49%) had no documented date and time of insertion. CONCLUSIONS In this study, we found that many PIVCs were placed in areas of flexion, were symptomatic or idle, had suboptimal dressings, or lacked adequate documentation. This suggests inconsistency between recommended management guidelines for PIVCs and current practice.

Teaching medical students ultrasound-guided vascular access - which learning method is best?

Introduction Ultrasound is recommended to guide insertion of peripheral intravenous vascular cannulae (PIVC) where difficulty is experienced. Ultrasound machines are now common-place and junior doctors are often expected to be able to use them. The educational standards for this skill are highly varied, ranging from no education, to self-guided internet-based education, to formal, face-to-face traditional education. In an attempt to decide which educational technique our institution should introduce, a small pilot trial comparing educational techniques was designed. Methods Thirty medical students were enrolled and allocated to one of three groups. PIVC placing ability was then observed, tested and graded on vascular access phantoms. Results The formal, face-to-face traditional education was rated best by the students, and had the highest success rate in PIVC placement, the improvement statistically significant compared to no education (p = 0.01) and trending towards significance when compared to self-directed internet-based education (p<0.06). Conclusions The group receiving traditional face-to-face teaching on ultrasound-guided vascular access, performed significantly better than those not receiving education. As the number of ultrasound machines in clinical areas increases, it is important that education programs to support their safe and appropriate use are developed.

IM ready to learn: Undergraduate nursing students' knowledge, preferences, and practice of mobile technology and social media

The purpose of this study was to identify in what way social media and mobile technology assist with learning and education of the undergraduate nurse. The study involved undergraduate nursing students across three campuses from the University of Notre Dame Australia. Participants were invited to complete an online questionnaire that related to their current knowledge, preferences, and practice with mobile technology and social media within their undergraduate nursing degree. A quantitative descriptive survey design was adapted from an initial pilot survey by the authors. A total of 386 nursing students (23.47% of the total enrolment) completed the online survey. Overall, results suggested that students are more supportive of social media and mobile technology in principle than in practice. Students who frequently use mobile technologies prefer to print out, highlight, and annotate the lecture material. Findings suggest that nursing students currently use mobile technology and social media and are keen to engage in ongoing learning and collaboration using these resources. Therefore, nursing academia should encourage the appropriate use of mobile technology and social media within the undergraduate curriculum so that responsible use of such technologies positively affects the future nursing workforce.