Citations

Significant increase in literature regarding “residents as teachers” highlights the importance of providing opportunities and implementing guidelines for continuing medical education and professional growth. Structured teaching assistant (TA) experiences are not uncommon. Programs, both nationally and internationally, have implemented and continue to provide established opportunities for under‐ and post‐ graduate students to develop teaching skills. However, due to the nature of undergraduate medical curricula, there is neither sufficient time nor an abundance of opportunity for medical students to develop teaching skills. The TA program at Mayo Clinic incorporates learning through apprenticeship and mentoring during a 7‐week anatomy block. This study explores the impact of the TA experience and the effectiveness of its facilitation by faculty mentors. Structured questionnaires obtained feedback regarding improvement in teaching and communication skills, as well as, experiences in curriculum development and educational research. Preliminary data revealed that teaching opportunities, mentoring from course faculty, and exposure to educational research and curriculum development improved the TA's ability to teach and fostered an increased interest in teaching. Medical student TA's perceive learning through apprenticeship and mentoring as an effective way to learn how to teach. Grant Funding Source : Department of Anatomy

Background and Purpose— Mechanical thrombectomy has been shown to improve clinical outcomes in patients with acute ischemic stroke. However, the impact of balloon guide catheter (BGC) use is not well established. Methods— STRATIS (Systematic Evaluation of Patients Treated With Neurothrombectomy Devices for Acute Ischemic Stroke) was a prospective, multicenter study of patients with large vessel occlusion treated with the Solitaire stent retriever as first-line therapy. In this study, an independent core laboratory, blinded to the clinical outcomes, reviewed all procedures and angiographic data to classify procedural technique, target clot location, recanalization after each pass, and determine the number of stent retriever passes. The primary clinical end point was functional independence (modified Rankin Scale, 0–2) at 3 months as determined on-site, and the angiographic end point was first-pass effect (FPE) success rate from a single device attempt (modified Thrombolysis in Cerebral Infarction, ≥2c) as determined by a core laboratory. Achieving modified FPE (modified Thrombolysis in Cerebral Infarction, ≥2b) was also assessed. Comparisons of clinical outcomes were made between groups and adjusted for baseline and procedural characteristics. All participating centers received institutional review board approval from their respective institutions. Results— Adjunctive technique groups included BGC (n=445), distal access catheter (n=238), and conventional guide catheter (n=62). The BGC group had a higher rate of FPE following first pass (212/443 [48%]) versus conventional guide catheter (16/62 [26%]; P =0.001) and distal access catheter (83/235 [35%]; P =0.002). Similarly, the BGC group had a higher rate of modified FPE (294/443 [66%]) versus conventional guide catheter (26/62 [42%]; P <0.001) and distal access catheter (129/234 [55%]; P =0.003). The BGC group achieved the highest rate of functional independence (253/415 [61%]) versus conventional guide catheter (23/55 [42%]; P =0.007) and distal access catheter (113/218 [52%]; P =0.027). Final revascularization and mortality rates did not differ across the groups. Conclusions— BGC use was an independent predictor of FPE, modified FPE, and functional independence, suggesting that its routine use may improve the rates of early revascularization success and good clinical outcomes. Clinical Trial Registration— URL: https://www.clinicaltrials.gov . Unique identifier: NCT02239640.

Background: Endovascular treatment with mechanical thrombectomy (MT) is beneficial for patients with acute stroke suffering a large-vessel occlusion, although treatment efficacy is highly time-dependent. We hypothesized that interhospital transfer to endovascular-capable centers would result in treatment delays and worse clinical outcomes compared with direct presentation. Methods: STRATIS (Systematic Evaluation of Patients Treated With Neurothrombectomy Devices for Acute Ischemic Stroke) was a prospective, multicenter, observational, single-arm study of real-world MT for acute stroke because of anterior-circulation large-vessel occlusion performed at 55 sites over 2 years, including 1000 patients with severe stroke and treated within 8 hours. Patients underwent MT with or without intravenous tissue plasminogen activator and were admitted to endovascular-capable centers via either interhospital transfer or direct presentation. The primary clinical outcome was functional independence (modified Rankin Score 0–2) at 90 days. We assessed (1) real-world time metrics of stroke care delivery, (2) outcome differences between direct and transfer patients undergoing MT, and (3) the potential impact of local hospital bypass. Results: A total of 984 patients were analyzed. Median onset-to-revascularization time was 202.0 minutes for direct versus 311.5 minutes for transfer patients ( P <0.001). Clinical outcomes were better in the direct group, with 60.0% (299/498) achieving functional independence compared with 52.2% (213/408) in the transfer group (odds ratio, 1.38; 95% confidence interval, 1.06–1.79; P =0.02). Likewise, excellent outcome (modified Rankin Score 0–1) was achieved in 47.4% (236/498) of direct patients versus 38.0% (155/408) of transfer patients (odds ratio, 1.47; 95% confidence interval, 1.13–1.92; P =0.005). Mortality did not differ between the 2 groups (15.1% for direct, 13.7% for transfer; P =0.55). Intravenous tissue plasminogen activator did not impact outcomes. Hypothetical bypass modeling for all transferred patients suggested that intravenous tissue plasminogen activator would be delayed by 12 minutes, but MT would be performed 91 minutes sooner if patients were routed directly to endovascular-capable centers. If bypass is limited to a 20-mile radius from onset, then intravenous tissue plasminogen activator would be delayed by 7 minutes and MT performed 94 minutes earlier. Conclusions: In this large, real-world study, interhospital transfer was associated with significant treatment delays and lower chance of good outcome. Strategies to facilitate more rapid identification of large-vessel occlusion and direct routing to endovascular-capable centers for patients with severe stroke may improve outcomes. Clinical Trial Registration: URL: https://www.clinicaltrials.gov . Unique identifier: NCT02239640.

Objectives/HypothesisMultiple system atrophy (MSA) is a degenerative neurologic disorder that can affect vocal fold mobility. Our aim was to further elucidate the impact of vocal fold motion impairment (VFMI) in MSA.Study DesignRetrospective case series.MethodsWe undertook a retrospective review of all MSA patients reporting voice or respiratory symptoms from 1975 to 2010 at Mayo Clinic Rochester who also received otolaryngologic examination.ResultsThirty‐eight MSA patients demonstrated VFMI. Median duration of vocal or respiratory symptoms prior to diagnosis of MSA was 12.0 months (range, 1–60 months). Stridor was present in 25 (68%) of patients. There was bilateral VFMI in 32 (82.4%) of the patients and isolated VFMI of the left true vocal fold (TVF) in six (17.6%) of the patients. No patients had isolated right VFMI. There was isolated unilateral or bilateral paresis in 21 (55.3%) of the patients and unilateral or bilateral complete paralysis in 15 (39.5%) of the patients. One patient presented with left TVF paralysis and right TVF paresis, whereas one other patient had findings of right TVF paralysis and left TVF paresis comprising the remaining 5.2% of patients with VFMI. The median survival after diagnosis of VFMI was 51.6 months. Unilateral or bilateral TVF paralysis was statistically associated with a decreased overall survival (P = .0384). The presence of stridor was not associated with adverse prognosis.ConclusionsThe increasing severity of VFMI negatively impacts overall survival in patients with MSA. Therefore, otolaryngologic examination is warranted at the time of MSA diagnosis.Level of Evidence4. Laryngoscope, 124:730–735, 2014

Teaching is an increasingly recognized responsibility of the resident physician. Residents, however, often assume teaching responsibilities without adequate preparation. Consequently, many medical schools have implemented student‐as‐teacher (SAT) programs that provide near‐peer teaching opportunities to senior medical students. Near‐peer teaching is widely regarded as an effective teaching modality; however, whether near‐peer teaching experiences in medical school prepare students for the teaching demands of residency is less understood. We explored whether the anatomy‐based SAT program through the Human Structure didactic block at Mayo Medical School addressed the core teaching competencies of a medical educator and prepared its participants for further teaching roles in their medical careers. A web‐based survey was sent to all teaching assistants in the anatomy‐based SAT program over the past five years (2007–2011). Survey questions were constructed based on previously published competencies in seven teaching domains – course development, course organization, teaching execution, student coaching, student assessment, teacher evaluation, and scholarship. Results of the survey indicate that participants in the anatomy‐based SAT program achieved core competencies of a medical educator and felt prepared for the teaching demands of residency. Anat Sci Educ 6: 385–392. © 2013 American Association of Anatomists.

Background and Purpose— Multiple approaches are being studied to enhance the rate of thrombolysis for acute ischemic stroke. Treatment of myocardial infarction with a combination of a reduced-dose fibrinolytic agent and a glycoprotein (GP) IIb/IIIa receptor antagonist has been shown to improve the rate of recanalization versus fibrinolysis alone. The c ombined approach to l ysis utilizing e ptifibatide a nd r ecombinant tissue-type plasminogen activator (rt-PA) (CLEAR) stroke trial assessed the safety of treating acute ischemic stroke patients within 3 hours of symptom onset with this combination. Methods— The CLEAR trial was a National Institutes of Health/National Institute of Neurological Disorders and Stroke–funded multicenter, double-blind, randomized, dose-escalation and safety study. Patients were randomized 3:1 to either low-dose rt-PA (tier 1=0.3 mg/kg, tier 2=0.45 mg/kg) plus eptifibatide (75 μg/kg bolus followed by 0.75 μg/kg per min infusion for 2 hours) or standard-dose rt-PA (0.9 mg/kg). The primary safety end point was the incidence of symptomatic intracerebral hemorrhage within 36 hours. Secondary analyses were performed regarding clinical efficacy. Results— Ninety-four patients (40 in tier 1 and 54 in tier 2) were enrolled. The combination group of the 2 dose tiers (n=69) had a median age of 71 years and a median baseline National Institutes of Health Stroke Scale (NIHSS) score of 14, and the standard-dose rt-PA group (n=25) had a median age of 61 years and a median baseline NIHSS score of 10 ( P =0.01 for NIHSS score). Fifty-two (75%) of the combination treatment group and 24 (96%) of the standard treatment group had a baseline modified Rankin scale score of 0 ( P =0.04). There was 1 (1.4%; 95% CI, 0% to 4.3%) symptomatic intracranial hemorrhage in the combination group and 2 (8.0%; 95% CI, 0% to 19.2%) in the rt-PA–only arm ( P =0.17). During randomization in tier 2, a review by the independent data safety monitoring board demonstrated that the safety profile of combination therapy at the tier 2 doses was such that further enrollment was statistically unlikely to indicate inadequate safety for the combination treatment group, the ultimate outcome of the study. Thus, the study was halted. There was a trend toward increased clinical efficacy of standard-dose rt-PA compared with the combination treatment group. Conclusions— The safety of the combination of reduced-dose rt-PA plus eptifibatide justifies further dose-ranging trials in acute ischemic stroke.