Related Experiment Video
Updated: Jun 29, 2026

Continuous Venous-Arterial Doppler Ultrasound During a Preload Challenge
Published on: January 20, 2023
Pulse volume changes recorded by air plethysmography during single hemodialysis sessions
Mariusz Kusztal1, Jacek Kleszczyński, Wacław Weyde
1Department of Nephrology and Transplantation Medicine, Wroclaw Medical University, Wroclaw, Poland. mariok@tlen.pl
Aims:
This study investigated whether fluid removal during a hemodialysis (HD) session affects the results of non-invasive pulse volume recording (PVR) on the lower extremities.
Methods:
The results of PVR by air plethysmography (Portable Vascular Laboratory; BioMedix, USA) were compared with bioelectrical impedance analysis (Nutriguard-M device; Data Input, Germany) of the human body before and after a single HD in 28 anuric patients (10 women; 18 men) aged 33-76 years.
Results:
Changes in the wave amplitude of the PVR correlated with the changes in the patient's weight during HD. Lower stroke volume at the end of HD due to blood volume withdrawal resulted in PVR reduction at the ankle level. Significant Spearman coefficients were found between extracellular water and PVR amplitude changes (r = 0.7, p < 0.01) as well as between intracellular water and PVR (r = 0.6, p < 0.04).
Conclusions:
To avoid falsification connected with hypervolemia and stroke volume change, the most appropriate time for PVR in vascular diagnosing seems to be the period of a few hours after dialysis session.
Related Concept Videos
Hemodialysis II: Procedure and Complications
Hemodialysis III: Nursing Management
Hemodialysis I: Introduction
Pulse
Pulse Rate and its Significance
Pulse rate, often measured in beats per minute (bpm), reflects the heart rate (HR), which is influenced by numerous factors such as stress, physical activity, and hormonal changes. A normal resting adult pulse rate falls between...
Special considerations while measuring blood pressure
Monitoring Both Arms:
Monitoring BP in both arms during the initial assessment is advisable, as the systolic value may differ by five to ten mm Hg between arms. For subsequent BP assessments, use the arm with the higher reading.
Peritoneal Dialysis I: Introduction and Procedure

