The influence of patient position on ultrasound examination of the sciatic nerve in the popliteal fossa: A cross-sectional study.

Introduction/Purpose: Ultrasound-guided popliteal fossa sciatic nerve (PFSN) blocks are performed with patients in the supine, lateral or prone position. No known studies compare the quality of images obtained from each approach. This study examines the quality of supine and prone PFSN ultrasound images. Methods: Thirty-eight adult volunteers were sorted into two groups. Five regional anaesthesiologists performed ultrasound examinations of the PFSN on volunteers in supine and prone positions. Popliteal fossa sciatic nerve image quality was analysed with grayscale techniques and peer evaluation. Popliteal fossa sciatic nerve depth, distance from the popliteal crease and time until optimal imaging were recorded. Results: The grayscale ratio of the PFSN vs. the background was 1.83 (supine) and 1.75 (prone) (P = 0.034). Similarly, the grayscale ratio of the PFSN vs. the immediately adjacent area was 1.65 (supine) and 1.55 (prone) (P = 0.004). Mean depth of the PFSN was 1.6 cm (supine) and 1.7 cm (prone) (P = 0.009). Average distance from the popliteal crease to the PFSN was 5.9 cm (supine) and 6.6 cm (prone) (P = 0.02). Mean time to acquire optimal imaging was 36 s (supine) and 47 s (prone) (P = 0.002). Observers preferred supine positioning 53.8%, prone positioning 22.5% and no preference 23.7% of the time. Observers with strong preferences preferred supine imaging in 70.9% of cases. Conclusions: Supine ultrasound examination offered quicker identification of the PFSN, in a more superficial location, closer to the popliteal crease and with enhanced contrast to surrounding tissue, correlating with observer preferences for supine positioning. These results may influence ultrasound-guided PFSN block success rates, especially in difficult-to-image patients.

Leveraging Telemedicine for Quality Improvement Video Review of Critical ICU Events: A Novel Multidisciplinary Form of Education.

The objectives of this study were to codify the events triggering bedside recording and to report the types of performance issues identified that were then used to inform dedicated ICU quality improvement efforts. DESIGN: This is a retrospective descriptive analysis of a video review program conducted at a single institution from July 2016 to November 2019. SETTING: Surgical and Trauma ICU at a single urban academic quaternary care center. PATIENTS: All patients admitted to the surgical and trauma ICU between July 2016 and November 2019 were eligible for the study as all ICU beds in our health system institutions are equipped with closed circuit video/audio monitoring. Through an institutional review board approved program, any event triggering the immediate bedside presence of a provider in the ICU is routinely recorded at the discretion of the care team or tele-intensivist. INTERVENTIONS: A database of these events was created over a 3-year period, and cases were reviewed for content, quality improvement, and educational opportunities. Select recordings were analyzed and shared at multidisciplinary/multiprofessional video review sessions. MEASUREMENTS AND MAIN RESULTS: There were 286 critical events video recorded and reviewed in the ICUs between July 2016 and November 2019. The most commonly recorded events included: cardiopulmonary arrests (n = 75), intubations (n = 71), and acute clinical decompensation triggered by nonreassuring vital signs (n = 57) or arrhythmias (n = 13). Of these recordings, 59 were shared at video review conferences, where quality of care was assessed and thematic opportunities for improvement were characterized. Recurrent quality improvement themes that were identified included adherence to protocols, the importance of teamwork and closed-loop communication, clearly designated team leadership, and the use of universal precautions. CONCLUSIONS: Video review in the ICU is feasible and presents valuable opportunities for quality improvement and educational discussions.

Respiratory mechanics and mortality in coronavirus disease 2019 acute respiratory distress syndrome: A retrospective cohort study.

BACKGROUND: The association between commonly monitored respiratory parameters, including compliance and oxygenation and clinical outcomes in acute respiratory distress syndrome (ARDS) from coronavirus disease 2019 (COVID-19) remains unclear, limiting prognostication and the delivery of targeted treatments. Our project aim was to identify if any such associations exist between clinical outcomes and respiratory parameters. METHODS: We performed a retrospective observational cohort study of confirmed COVID-19 positive patients admitted to a single dedicated intensive care unit at a university hospital from March 27 to April 26, 2020. We collected information on baseline clinical and demographic characteristics and initial respiratory parameters. Our primary outcome was in-hospital mortality. RESULTS: A total of 22 patients met criteria for ARDS and were included in our study. Nine of the 22 (40.9%) patients with ARDS died during hospitalization. The initial static respiratory system compliance of survivors was 39 (interquartile range [IQR] 34, 55) and nonsurvivors was 27 (IQR 24, 33, P < 0.01). A lower respiratory system compliance was associated with an increased adjusted odd of in-hospital mortality (odds ratio 1.2, 95% confidence interval 1.01, 1.45 P = 0.04). CONCLUSION: In our cohort of 22 patients mechanically ventilated with ARDS from COVID-19, having lower respiratory system compliance after intubation was associated with an increased risk of in-hospital mortality, consistent with ARDS from non-COVID etiologies.

The Year in Vascular Anesthesia: Selected Highlights From 2018.

This special article is the second in an annual series for the Journal of Cardiothoracic and Vascular Anesthesia that is specifically dedicated to highlights in vascular anesthesiology published in 2018. This review begins with 2 updates in preoperative medicine in the vascular surgery population, including recent publications regarding the management of angiotensin-converting enzyme inhibitors and angiotensin II receptor blockers and antiplatelet medications in the perioperative period. The next section focuses on complications related to thoracic endovascular aortic surgery, particularly as technology advances allow for endovascular repair of more complex anatomy. The final section focuses on quality in vascular surgery and evaluates recent publications that examine the safety and feasibility of fast-track endovascular aortic surgery. Even though this is only a sampling of the literature published in 2018 relevant to the cardiovascular anesthesiologist, these themes represent some of the topics most clinically relevant to the perioperative period.