Participant Perceptions of Augmented Reality Simulation for Cardiac Anesthesiology Training: A Prospective, Mixed-Methods Study.

Background: Simulations are a critical component of anesthesia education, and ways to broaden their delivery and accessibility should be studied. The primary aim was to characterize anesthesiology resident, fellow, and faculty experience with augmented reality (AR) simulations. The secondary aim was to explore the feasibility of quantifying performance using integrated eye-tracking technology. Methods: This was a prospective, mixed-methods study using qualitative thematic analysis of user feedback and quantitative analysis of gaze patterns. The study was conducted at a large academic medical center in Northern California. Participants included 7 anesthesiology residents, 6 cardiac anesthesiology fellows, and 5 cardiac anesthesiology attendings. Each subject participated in an AR simulation involving resuscitation of a patient with pericardial tamponade. Postsimulation interviews elicited user feedback, and eye-tracking data were analyzed for gaze duration and latency. Results: Thematic analysis revealed 5 domains of user experience: global assessment, spectrum of immersion, comparative assessment, operational potential, and human-technology interface. Participants reported a positive learning experience and cited AR technology's portability, flexibility, and cost-efficiency as qualities that may expand access to simulation training. Exploratory analyses of gaze patterns suggested that trainees had increased gaze duration of vital signs and gaze latency of malignant arrythmias compared with attendings. Limitations of the study include lack of a control group and underpowered statistical analyses of gaze data. Conclusions: This study suggests positive user perception of AR as a novel modality for medical simulation training. AR technology may increase exposure to simulation education and offer eye-tracking analyses of learner performance.

Defining postoperative ileus and associated risk factors in patients undergoing radical cystectomy with an Enhanced Recovery After Surgery (ERAS) program.

INTRODUCTION: Postoperative ileus (POI) is a common complication of radical cystectomy (RC), occurring in 1.6-23.5% of cases. It is defined heterogeneously in the literature. POI increases hospital length of stay and postoperative morbidity. Factors such as age, epidural use, length of procedure, and blood loss may impact POI. In this study, we aimed to evaluate risk factors that contribute to POI in a cohort of patients managed with a comprehensive Enhanced Recovery After Surgery (ERAS) protocol. METHODS: A retrospective review of consecutive patients who underwent RC from March 2015 to December 2016 at Vancouver General Hospital was performed. POI was defined a priori as insertion of nasogastric tube for nausea or vomiting, or failure to advance to a solid diet by the seventh postoperative day. To illustrate heterogeneity in previous studies, we also evaluated POI using other previously reported definitions in the RC literature. The influence of potential risk factors for POI, including patient comorbidities, American Society of Anesthesiologists score, gender, age, prior abdominal surgery or radiation, length of operation, diversion type, extent of lymph node dissection, removal date of analgesic catheter, blood loss, and fluid administration volume was analyzed. RESULTS: Thirty-six (27%) of 136 patients developed POI. Using other previously reported definitions for POI, the incidence ranged from <1-51%. Node-positive status and age at surgery were associated with POI on univariate analysis but not multivariable analysis. CONCLUSIONS: A large range of POI incidence was observed using previously published definitions of POI. We advocate for a standardized definition of POI when evaluating RC outcomes. POI occurs frequently even with a comprehensive ERAS protocol, suggesting that additional measures are needed to reduce the rate of POI.

Predicting complications following radical cystectomy with the ACS NSQIP universal surgical risk calculator.

INTRODUCTION: Radical cystectomy (RC) is a challenging procedure with significant morbidity, though remains the standard of care treatment for many patients with bladder cancer. There has been debate regarding the utility of universal risk calculators to aid in point-of-care prediction of complications in individual patients preoperatively. We retrospectively evaluated the predictive value of the ACS NSQIP universal surgical risk calculator in our patients who underwent RC. METHODS: A prospective cohort of patients undergoing RC was retrospectively reviewed between October 2014 and August 2017. Only patients who underwent a RC for genitourinary cancer without significant deviation from NSQIP surgery codes 51590, 51595, and 51596 (n = 29) were included. The accuracy of the risk calculator was assessed by ROC AUC and Brier scores for both NSQIP and Clavien-Dindo defined complications. Additionally, each NSQIP risk factor was individually assessed for association with postoperative complications. RESULTS: 223 patients who underwent open or robotic RC (n = 18) were included for analysis. Determined by AUC C-stat and Brier scores, prediction was good for cardiac complications (0.80 and 0.021), fair for pneumonia (0.75 and 0.017), poor for UTI (0.64 and 0.078), 30-day mortality (0.62 and 0.013), any complication (0.60 and 0.19) and serious complication (0.60 and 0.17). There was a significant discordance between the rate of NSQIP predicted vs. Clavien-Dindo observed any and serious complications: 28.8% vs. 67.3%, and 25.3% vs. 11.7%, respectively. CONCLUSION: The NSQIP universal surgical risk calculator did not perform with enough accuracy to consider adoption into clinical practice.

Enhanced recovery after surgery in colorectal surgery: Impact of protocol adherence on patient outcomes.

STUDY OBJECTIVES: There is growing evidence internationally to support Enhanced Recovery After Surgery (ERAS) pathways. The impact of pathway compliance and the relative importance of individual components, however, remains less clear. Our institution implemented a multimodal ERAS protocol for elective colorectal surgery in November 2013. The objectives of this study were to investigate the impact of the introduction of the pathway, the relationship between pathway adherence and patient outcomes, and the relative importance of individual components. DESIGN: This was a single-center, observational cohort study of elective colorectal surgical patients. SETTING: A tertiary care and academic teaching hospital in Canada. PATIENTS: Prospective data was collected from 495 consecutive major colorectal surgical patients following the ERAS launch. Retrospective data was also collected from a pre-ERAS cohort of 99. MEASUREMENTS: Adherence to 12 ERAS components were measured, along with American College of Surgeons National Surgical Quality Improvement Program (ACS NSQIP®) defined patient complications and hospital length of stay (LOS). Post-ERAS patients were divided in to two groups: high compliance (≥75% process adherence) and low compliance (<75% adherence). Outcomes were compared between groups. MAIN RESULTS: There was a significant reduction in both complication rate (31.5% vs 14.6%; p ≤0.05) and hospital mean LOS (10.1 vs 6.9 days; p ≤0.05) following introduction of the ERAS pathway. The high adherence group had a shorter mean LOS (5.7 vs 8.6 days; p ≤0.01) and lower rate of complications (11.2% vs 19.6%; p = 0.02) compared with the low compliance group. CONCLUSIONS: Higher adherence to the standardized ERAS protocol was associated with improved patient outcomes, including reduced pulmonary complications. The cause-effect relationship is complex and likely influenced by confounding factors. Our data provides feedback to aid ongoing innovation of our pathway locally and adds to the growing body of evidence supporting the value of ERAS in general.