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Using lectures to identify student misconceptions: a study on the paradoxical effects of hyperkalemia on vascular smooth muscle.
Bordes, Stephen J; Gandhi, Jason; Bauer, Blake; Protas, Matthew; Solomon, Nadia; Bogdan, Lukasz; Brummund, Dieter; Bass, Brittany; Clunes, Mark; Murray, Ian V J.
Afiliación
  • Bordes SJ; Medical Student Research Institute, St. George's University School of Medicine, St. George's, Grenada.
  • Gandhi J; Medical Student Research Institute, St. George's University School of Medicine, St. George's, Grenada.
  • Bauer B; Medical Student Research Institute, St. George's University School of Medicine, St. George's, Grenada.
  • Protas M; School of Medicine, State University of New York Upstate Medical University, Syracuse, New York.
  • Solomon N; Medical Student Research Institute, St. George's University School of Medicine, St. George's, Grenada.
  • Bogdan L; Medical Student Research Institute, St. George's University School of Medicine, St. George's, Grenada.
  • Brummund D; Medical Student Research Institute, St. George's University School of Medicine, St. George's, Grenada.
  • Bass B; Northwell Health, Lenox Hill Hospital, New York, New York.
  • Clunes M; Department of Neuroscience, Physiology and Behavioral Sciences, St. George's University School of Medicine, St. George's, Grenada.
  • Murray IVJ; Department of Neuroscience, Physiology and Behavioral Sciences, St. George's University School of Medicine, St. George's, Grenada.
Adv Physiol Educ ; 44(1): 15-20, 2020 Mar 01.
Article en En | MEDLINE | ID: mdl-31821033
ABSTRACT
Medical students have difficulty understanding the mechanisms underlying hyperkalemia-mediated local control of blood flow. Such control mechanisms are crucial in the brain, kidney, and skeletal muscle vasculature. We aimed to identify medical students' misconceptions via assessment of students' in-class knowledge and, subsequently, improve future teaching of this concept. In-class polling was performed with the TurningPoint clicker response system (n = 860) to gauge students' understanding of three physiological concepts related to hyperkalemia membrane potential (Vm), conductance, and smooth muscle response. Vm includes the concepts of equilibrium potential (Veq) for specific ions, as well as driving force (DF = Vm - Veq). Students understood the concept of DF (~70% answered correctly), suggesting their understanding of Vm. However, students misunderstood that hyperkalemia results in depolarization (~52% answered correctly) and leads to an increase in potassium conductance (~31% answered correctly). Clarification of the type of smooth muscle as vascular increased the percentage of correct responses (~51 to 73%). The data indicate that students lacked knowledge of specific potassium conductance in various muscle types, resulting in divergent responses, such as the canonical depolarization in skeletal muscle versus hyperpolarization in smooth muscle cells during hyperkalemia. Misunderstanding of this crucial concept of conductance is directly related to the students' performance. Furthermore, we connected the paradoxical effect of hyperkalemia to pathological acute and chronic hyperkalemia clinical scenarios.
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Texto completo: 1 Banco de datos: MEDLINE Asunto principal: Fisiología / Estudiantes de Medicina / Enseñanza / Conocimientos, Actitudes y Práctica en Salud / Hiperpotasemia / Músculo Liso Vascular Límite: Humans Idioma: En Revista: Adv Physiol Educ Asunto de la revista: EDUCACAO / FISIOLOGIA Año: 2020 Tipo del documento: Article País de afiliación: Grenada

Texto completo: 1 Banco de datos: MEDLINE Asunto principal: Fisiología / Estudiantes de Medicina / Enseñanza / Conocimientos, Actitudes y Práctica en Salud / Hiperpotasemia / Músculo Liso Vascular Límite: Humans Idioma: En Revista: Adv Physiol Educ Asunto de la revista: EDUCACAO / FISIOLOGIA Año: 2020 Tipo del documento: Article País de afiliación: Grenada