ERIC Number: EJ1091163
Record Type: Journal
Publication Date: 2016-Mar
Abstractor: As Provided
Central Respiratory Chemosensitivity and Cerebrovascular CO[subscript 2] Reactivity: A Rebreathing Demonstration Illustrating Integrative Human Physiology
MacKay, Christina M.; Skow, Rachel J.; Tymko, Michael M.; Boulet, Lindsey M.; Davenport, Margie H.; Steinback, Craig D.; Ainslie, Philip N.; Lemieux, Chantelle C. M.; Day, Trevor A.
Advances in Physiology Education, v40 n1 p79-92 Mar 2016
One of the most effective ways of engaging students of physiology and medicine is through laboratory demonstrations and case studies that combine 1) the use of equipment, 2) problem solving, 3) visual representations, and 4) manipulation and interpretation of data. Depending on the measurements made and the type of test, laboratory demonstrations have the added benefit of being able to show multiple organ system integration. Many research techniques can also serve as effective demonstrations of integrative human physiology. The "Duffin" hyperoxic rebreathing test is often used in research settings as a test of central respiratory chemosensitivity and cerebrovascular reactivity to CO[subscript 2]. We aimed to demonstrate the utility of the hyperoxic rebreathing test for both respiratory and cerebrovascular responses to increases in CO[subscript 2] and illustrate the integration of the respiratory and cerebrovascular systems. In the present article, methods such as spirometry, respiratory gas analysis, and transcranial Doppler ultrasound are described, and raw data traces can be adopted for discussion in a tutorial setting. If educators have these instruments available, instructions on how to carry out the test are provided so students can collect their own data. In either case, data analysis and quantification are discussed, including principles of linear regression, calculation of slope, the coefficient of determination (R[superscript 2]), and differences between plotting absolute versus normalized data. Using the hyperoxic rebreathing test as a demonstration of the complex interaction and integration between the respiratory and cerebrovascular systems provides senior undergraduate, graduate, and medical students with an advanced understanding of the integrative nature of human physiology.
Descriptors: Physiology, Demonstrations (Educational), Human Body, Medical Education, Science Laboratories, College Science, Science Instruction, College Instruction, Undergraduate Students, Graduate Students, Medical Students, Foreign Countries
American Physiological Society. 9650 Rockville Pike, Bethesda, MD 20814-3991. Tel: 301-634-7164; Fax: 301-634-7241; e-mail: email@example.com; Web site: http://advan.physiology.org/
Publication Type: Journal Articles; Reports - Research
Education Level: Higher Education; Postsecondary Education
Authoring Institution: N/A
Identifiers - Location: Canada
Grant or Contract Numbers: N/A