Using Ultrasound to Enhance Medical Students' Femoral Vascular Physical Examination Skills. 2015

Justin S Ahn, and Andrew J French, and Molly E W Thiessen, and Vaughn Browne, and Mark Deutchman, and Gretchen Guiton, and Wendy Madigosky, and John L Kendall
Department of Emergency Medicine, Royal Columbian Hospital, New Westminster, British Columbia, Canada (J.S.A.); Department of Emergency Medicine, Denver Health Medical Center, Denver, Colorado USA (A.J.F., M.E.W.T., J.L.K.); and Departments of Emergency Medicine (A.J.F., M.E.W.T., V.B., J.L.K.), Family Medicine (M.D., W.M.), and Medicine (G.G.), University of Colorado School of Medicine, Aurora, Colorado USA.

OBJECTIVE To determine whether the addition of ultrasound to traditional physical examination instruction improves junior medical students' abilities to locate the femoral pulse. METHODS Initially, 150 second-year medical students were taught the femoral pulse examination using traditional bedside teaching on standardized patients and online didactic videos. Students were then randomized into 2 groups: group 1 received ultrasound training first and then completed the standardized examination; and group 2 performed the standardized examination first and then received ultrasound training. On the standardized patients, the femoral artery was marked with invisible ink before the sessions using ultrasound. Compared to these markers, students were then evaluated on the accuracy of femoral artery pulse palpation and the estimated location of the femoral vein. All students completed a self-assessment survey after the ultrasound sessions. RESULTS Ultrasound training improved the students' ability to palpate the femoral pulse (P= .02). However, ultrasound did not facilitate correct estimation of the femoral vein's anatomic location (P = .09). Confidence levels in localizing the femoral artery and vein were equal between groups at baseline, and both increased after the ultrasound sessions. CONCLUSIONS The addition of ultrasound teaching to traditional physical examination instruction enhanced medical student competency and confidence with the femoral vascular examination. However, understanding of anatomy may require emphasis on precourse didactic material, but further study is required.

UI MeSH Term Description Entries
D008297 Male Males
D010173 Palpation Application of fingers with light pressure to the surface of the body to determine consistence of parts beneath in physical diagnosis; includes palpation for determining the outlines of organs. Palpations
D011674 Pulse The rhythmical expansion and contraction of an ARTERY produced by waves of pressure caused by the ejection of BLOOD from the left ventricle of the HEART as it contracts. Pulses
D002983 Clinical Competence The capability to perform acceptably those duties directly related to patient care. Clinical Skills,Competence, Clinical,Clinical Competency,Clinical Skill,Competency, Clinical,Skill, Clinical,Skills, Clinical,Clinical Competencies,Competencies, Clinical
D003120 Colorado State bounded on the north by Wyoming and Nebraska, on the east by Kansas and Nebraska, on the south by New Mexico and Oklahoma, and on the west by Utah.
D004504 Education, Medical, Undergraduate The period of medical education in a medical school. In the United States it follows the baccalaureate degree and precedes the granting of the M.D. Medical Education, Undergraduate,Education, Undergraduate Medical,Undergraduate Medical Education
D005260 Female Females
D005263 Femoral Artery The main artery of the thigh, a continuation of the external iliac artery. Common Femoral Artery,Arteries, Common Femoral,Arteries, Femoral,Artery, Common Femoral,Artery, Femoral,Common Femoral Arteries,Femoral Arteries,Femoral Arteries, Common,Femoral Artery, Common
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000328 Adult A person having attained full growth or maturity. Adults are of 19 through 44 years of age. For a person between 19 and 24 years of age, YOUNG ADULT is available. Adults

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