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Impedance plethysmography, PVR.
To measure changes in blood vessel size or changes in gas volume in the lungs to assist in diagnosing diseases such as deep vein thrombosis (DVT), chronic obstructive pulmonary disease (COPD), and some peripheral vascular disorders.
There are no food, fluid, or medication restrictions unless by medical direction. Instruct the patient to refrain from smoking for 2 hr prior to the procedure.
Critical Findings and Potential Interventions
Timely notification to the requesting health-care provider (HCP) of any critical findings and related symptoms is a role expectation of the professional nurse. A listing of these findings varies among facilities.