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Related Experiment Videos

Pneumatic Compression, But Not Exercise, Can Avoid Intradialytic Hypotension: A Randomized Trial.

Valeria R C Álvares1, Camila D Ramos, Benedito J Pereira

  • 1Nephrology Division, Universidade de São Paulo, São Paulo, Brazil.

American Journal of Nephrology
|April 14, 2017
PubMed
Summary

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Pneumatic compression during hemodialysis reduced dialysis-induced hypotension but did not improve phosphate removal. This intervention offers a potential strategy for managing blood pressure during dialysis.

Area of Science:

  • Nephrology
  • Cardiovascular Physiology
  • Biomedical Engineering

Background:

  • Conventional hemodialysis (HD) is linked to dialysis-induced hypotension (DIH) and poor phosphate clearance.
  • Legs are the primary source of extracellular fluid removed during HD, impacting venous return and blood flow.

Purpose of the Study:

  • To investigate if cycling exercise or pneumatic compression during HD can reduce DIH.
  • To determine if these interventions can enhance phosphate removal by increasing venous return and dialyzer phosphate supply.

Main Methods:

  • A randomized crossover study involving 21 patients undergoing three HD sessions: control, cycling exercise (first 60 min), and pneumatic compression (first 60 min).
  • Measurements included bioelectrical impedance, blood pressure, biochemical parameters, and direct phosphate quantification.
Keywords:
Blood pressureCicloergometryEnd-stage renal diseaseHemodynamicPhosphate

Related Experiment Videos

  • Dialysis-induced hypotension was defined as a drop in mean arterial pressure (MAP) ≥20 mm Hg.

    • Main Results:

    • Pneumatic compression showed a trend towards less change in mean arterial pressure (MAP) compared to control and cycling (p=0.021).
    • Dialysis-induced hypotension occurred less frequently with pneumatic compression (24%) versus control (43%) and cycling (38%) (p=0.014).
    • No significant differences were observed in ultrafiltration rate, weight change, or body water levels; phosphate removal did not increase with either intervention (p=0.486).

    Conclusions:

    • Pneumatic compression during the initial hour of hemodialysis is associated with a reduction in dialysis-induced hypotension.
    • Neither pneumatic compression nor cycling exercise improved fluid parameters or enhanced phosphate removal during hemodialysis.