View all text of Subpart B [§ 868.1030 - § 868.1975]
§ 868.1750 - Pressure plethysmograph.
(a) Identification. A pressure plethysmograph is a device used to determine a patient's airway resistance and lung volumes by measuring pressure changes while the patient is in an airtight box.
(b) Classification. Class II (performance standards).