Clinical Focus

  • Anesthesia

Academic Appointments

Administrative Appointments

  • Director of Regional Anesthesia, Oregon Health Science University (2003 - 2013)
  • Chief, Division of Regional Anesthesia, Stanford University (2013 - Present)

Honors & Awards

  • Medical/Professional Staff Chairman’s Award for Outstanding Contributions in Clinical Care Quality, Oregon Health & Science University (November 26, 2006)
  • Outstanding Teacher Award, CA2, Department of Anesthesiology, Oregon Health & Science University (2003)
  • Outstanding Teacher Award, CA3, Department of Anesthesiology, Oregon Health & Science University (2003)
  • Outstanding Teacher Award, Department of Anesthesiology, Oregon Health & Science University (2001)

Professional Education

  • Board Certification: Anesthesia, Medecin Specialiste en Anesthesiologie (1991)
  • Fellowship:Vanderbilt University Medical Center (1996) TN
  • Residency:Cliniques Universitaire St Luc (1990) Belgium
  • Medical Education:Catholic University of Louvain (1986) Belgium
  • MD, UniversitĂ© Catholique de Louvain (UCL) Brussels, Belgium (1986)


2016-17 Courses

Graduate and Fellowship Programs


All Publications

  • Development and Validation of an Assessment of Regional Anesthesia Ultrasound Interpretation Skills. Regional anesthesia and pain medicine Woodworth, G. E., Carney, P. A., Cohen, J. M., Kopp, S. L., Vokach-Brodsky, L. E., Horn, J. E., Missair, A., Banks, S. E., Dieckmann, N. F., Maniker, R. B. 2015; 40 (4): 306-314


    Interpretation of ultrasound images and knowledge of anatomy are essential skills for ultrasound-guided peripheral nerve blocks. Competency-based educational models promoted by the Accreditation Council for Graduate Medical Education require the development of assessment tools for the achievement of different competency milestones to demonstrate the longitudinal development of skills that occur during training.A rigorous study guided by psychometric principles was undertaken to identify and validate the domains and items in an assessment of ultrasound interpretation skills for regional anesthesia. A survey of residents, academic faculty, and community anesthesiologists, as well as video recordings of experts teaching ultrasound-guided peripheral nerve blocks, was used to develop short video clips with accompanying multiple choice-style questions. Four rounds of pilot testing produced a 50-question assessment that was subsequently administered online to residents, fellows, and faculty from multiple institutions.Test results from 90 participants were analyzed with Item Response Theory model fitting indicating that a 47-item subset of the test fits the model well (P = 0.11). There was a significant linear relation between expected and predicted item difficulty (P < 0.001). Overall test scores increased linearly with higher levels of formal anesthesia training, regional anesthesia training, number of ultrasound-guided blocks performed per year, and a self-rating of regional anesthesia skill (all P < 0.001).This study provides evidence for the reliability, content validity, and construct validity of a 47-item multiple choice-style online test of ultrasound interpretation skills for regional anesthesia, which can be used as an assessment of competency milestone achievement in anesthesiology training.

    View details for DOI 10.1097/AAP.0000000000000236

    View details for PubMedID 26017720

  • Regional anesthesia for vascular surgery. Anesthesiology clinics Flaherty, J., Horn, J., Derby, R. 2014; 32 (3): 639-659


    Patients presenting for vascular surgery present a challenge to anesthesiologists because of their severe systemic comorbidities. Regional anesthesia has been used as a primary anesthetic technique for many vascular procedures to avoid the cardiovascular and pulmonary perturbations associated with general anesthesia. In this article the use of regional anesthesia for carotid endarterectomy, open and endovascular abdominal aortic aneurysm repair, infrainguinal arterial bypass, lower extremity amputation, and arteriovenous fistula formation is described. A focus is placed on reviewing the literature comparing anesthetic techniques, with brief descriptions of the techniques themselves.

    View details for DOI 10.1016/j.anclin.2014.05.002

    View details for PubMedID 25113725

  • Efficacy of computer-based video and simulation in ultrasound-guided regional anesthesia training JOURNAL OF CLINICAL ANESTHESIA Woodworth, G. E., Chen, E. M., Horn, J. E., Aziz, M. F. 2014; 26 (3): 212-221


    To determine the effectiveness of a short educational video and simulation on improvement of ultrasound (US) image acquisition and interpretation skills.Prospective, randomized study.University medical center.28 anesthesia residents and community anesthesiologists with varied ultrasound experience were randomized to teaching video with interactive simulation or sham video groups.Participants were assessed preintervention and postintervention on their ability to identify the sciatic nerve and other anatomic structures on static US images, as well as their ability to locate the sciatic nerve with US on live models.Pretest written test scores correlated with reported US block experience (Kendall tau rank r = 0.47) and with live US scanning scores (r = 0.64). The teaching video and simulation significantly improved scores on the written examination (P < 0.001); however, they did not significantly improve live US scanning skills.A short educational video with interactive simulation significantly improved knowledge of US anatomy, but failed to improve hands-on performance of US scanning to localize the nerve.

    View details for DOI 10.1016/j.jclinane.2013.10.013

    View details for Web of Science ID 000337005900008