Camporesi E M, Feezor M, Fortune J, Salzano J
J Appl Physiol Respir Environ Exerc Physiol. 1978 Sep;45(3):481-3. doi: 10.1152/jappl.1978.45.3.481.
An electromagnetically powered respiratory valve to occlude a respiratory circuit for short (30--300ms) periods of the respiratory cycle may be inexpensively constructed from available laboratory instruments and controlled by an electronic circuit. Occlusion of the inspiratory breathing circuit may be repeated at different levels of ventilation without altering slopes or intercepts of CO2 rebreathing curves. The early phases of airway occlusion (P0.1) may therefore be studied in conscious unanesthetized human subjects.
一种电磁驱动的呼吸阀，可在呼吸周期的短时间（30 - 300毫秒）内阻塞呼吸回路，它可以用现有的实验室仪器廉价构建，并由电子电路控制。吸气呼吸回路的阻塞可以在不同的通气水平下重复进行，而不会改变二氧化碳重复呼吸曲线的斜率或截距。因此，可以在清醒未麻醉的人体受试者中研究气道阻塞的早期阶段（P0.1）。
