Standard long IV catheters versus extended dwell catheters: A randomized comparison of ultrasound-guided catheter survival.

INTRODUCTION: Establishing peripheral intravenous (IV) access is a vital step in providing emergency care. Ten to 30% of Emergency Department (ED) patients have difficult vascular access (DVA). Even after cannulation, early failure of US-guided IV catheters is a common complication. The primary goal of this study was to compare survival of a standard long IV catheter to a longer extended dwell catheter. METHODS: This study was a prospective, randomized comparative evaluation of catheter longevity. Two catheters were used in the comparison: [1] a standard long IV catheter, the 4.78 cm 20 gauge Becton Dickinson (BD); and [2] a 6 cm 3 French (19.5 gauge) Access Scientific POWERWAND™ extended dwell catheter (EDC). Adult DVA patients in the ED with vein depths of 1.20 cm-1.60 cm and expected hospital admissions of at least 24 h were recruited. RESULTS: 120 patients were enrolled. Ultimately, 70 patients were included in the survival analysis, with 33 patients in the EDC group and 37 patients in the standard long IV group. EDC catheters had lower rates of failure (p = 0.0016). Time to median catheter survival was 4.04 days for EDC catheters versus 1.25 days for the standard long IV catheter. Multivariate survival analysis also showed a significant survival benefit for the EDC catheter (p = 0.0360). CONCLUSION: A longer extended dwell catheter represents a viable and favorable alternative to the standard longer IVs used for US-guided cannulation of veins >1.20 cm in depth. These catheters have significantly improved survival rates with similar insertion success characteristics.

Preventing the collapse of a peripheral vein during cannulation: an evaluation of various tourniquet techniques on vein compressibility.

BACKGROUND: Venous access can occasionally be difficult to obtain secondary to near-complete compressibility of peripheral veins in some patients. OBJECTIVE: This study utilizes ultrasound to assess vein compressibility with different tourniquet techniques commonly available in the emergency department. METHODS: After approval by the Institutional Review Board, a prospective single-center study was conducted assessing the compressibility of basilic veins with ultrasound. Compressibility was assessed at baseline, use of one proximal tourniquet, two tourniquets (one distal and one proximal), and a proximal blood pressure cuff inflated to 150 mm Hg. Vein compressibility was rated as complete, moderate, or mild after light pressure was applied with the ultrasound probe. RESULTS: One hundred healthy patients were recruited into the study. Ninety-eight subjects had completely compressible basilic veins at baseline. When one tourniquet and two tourniquets were applied, 62 and 31 participants, respectively, demonstrated completely compressible veins. Fisher's exact test comparing one vs. two tourniquets revealed no difference between these two techniques (p = 0.4614). Only two participants continued to have a completely compressible vein after application of the blood pressure cuff with statistical significance by Fisher's exact test compared to both tourniquet groups (p < 0.0001). CONCLUSIONS: Both tourniquets and blood pressure cuffs can decrease the compressibility of peripheral veins. Although no difference was identified between one and two tourniquets, utilization of blood pressure cuffs significantly decreased compressibility. The findings of this study can be utilized in the emergency department when attempting to obtain peripheral venous access, specifically supporting the use of blood pressure cuffs to decrease compressibility.

Single Versus Double Tourniquet Technique for Ultrasound-Guided Venous Catheter Placement.

INTRODUCTION: Peripheral, ultrasound-guided intravenous (IV) access occurs frequently in the emergency department, but certain populations present unique challenges for successfully completing this procedure. Prior research has demonstrated decreased compressibility under double tourniquet technique (DT) compared with single tourniquet (ST). We hypothesized that catheters inserted under DT method would have a higher first-stick success rate compared with those inserted under ST method. METHODS: We randomized 100 patients with a history of difficult IV access, as defined by past ultrasound IV, prior emergency visit with two or more attempts required for vascular access, history of IV drug abuse, history of end stage renal disease on hemodialysis or obesity, to ultrasound-guided IV placement under either DT or ST method. We measured the vein characteristics measured under ultrasound, and recorded the number of attempts and location of attempts at vascular access. RESULTS: Of an initial 100 patients enrolled, we analyzed a total of 99 with 48 placed under ST and 51 placed under DT. Attending physicians inserted 41.7% of ST and 41.2% of DT, with non-attending inserters (including residents, nurses, and technicians) inserted the remainder. First-stick success rate was observed at 64.3% in ST and 66.7% in DT (p=0.93). Attendings had an overall higher first-stick success rate (95.1%) compared to non-attending inserters (65.5%) (p=<0.001). The average vein depth measured in ST was 0.73 centimeters (cm) compared with 0.87 cm in DT (p=0.02). CONCLUSION: DT technique did not produce a measureable increase in first-stick success rate compared to ST, including after adjusting for level of training of inserter. However, a significant difference in average vein depth between the study arms may have limited the reliability of our overall results. Future studies controlling for this variable may be required to more accurately compare these two techniques.

An Emergency Medicine Milestone-Based Simulation Curriculum: Acute Ischemic Stroke.

Introduction: The emergency medicine (EM) resident's ability to make independent decisions in the setting of acute ischemic stroke has been reduced as a result of the involvement of multidisciplinary teams. This simulation was created to give EM residents the opportunity to independently manage the early stages of ischemic stroke and its complications. Methods: A solo learner was presented with a 55-year-old male with complaints consistent with an acute stroke. The resident had to calculate stroke severity; coordinate hospital resources; discuss risks, benefits, and alternatives to thrombolysis; and deal with subsequent complications. The learner had to keep a broad differential for sudden change in mental status and consider alternative interventions. Strategies to decrease intracranial pressure needed to be implemented while obtaining neurosurgical consultation. Debriefing included discussion of expected actions in the context of the Accreditation Council for Graduate Medical Education (ACGME) milestones. Residents' review of their video performance added additional self-reflection. Results: A total of 69 PGY 3 EM residents independently participated in this simulation over a 5-year period. Thirty-two completed a postsimulation evaluation. Nearly all learners felt that this case reflected an actual patient encounter and increased their confidence in managing stroke. The milestone-based feedback tool was completed with all learners. Anticipated actions linked to Level 1 and 2 milestones were regularly achieved while acquisition of Level 3 and 4 actions varied. Discussion: Case actions were uniquely characterized by the ACGME milestones, which helped to delineate learners' knowledge gaps and provided concrete areas for improvement.