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Related Experiment Videos

Cold as cardiovascular stabilizing factor in hemodialysis: hemodynamic evaluation.

U Coli, S Landini, S Lucatello

    Transactions - American Society for Artificial Internal Organs
    |January 1, 1983
    PubMed
    Summary

    Lowering dialysate temperature during hemodialysis (HD) improves vascular stability in uremic patients. This study found that cooler dialysate maintained stable mean arterial pressure and enhanced cardiovascular stability, reducing intradialytic hypotension.

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    Area of Science:

    • Nephrology
    • Cardiovascular Physiology
    • Medical Technology

    Background:

    • Vascular instability and hypotension are common during hemodialysis for uremic patients.
    • Factors like catecholamines, plasma sodium, osmolality, and dialysate temperature influence intradialytic hemodynamic stability.
    • Dialysate temperature is a recently proposed factor affecting vascular stability.

    Purpose of the Study:

    • To investigate the role of dialysate temperature in maintaining hemodynamic stability during hemodialysis.
    • To evaluate the effect of cooling dialysate on intradialytic vascular complications in patients prone to hypotension.

    Main Methods:

    • A hemodynamic study was conducted on 5 patients experiencing frequent intradialytic hypotension.
    • Systemic and pulmonary hemodynamic parameters were measured using thermodilution during both warm (W-HD) and cold (C-HD) hemodialysis.

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  • Ultrafiltration and dialysate composition were kept constant; body temperature was monitored.

    • Main Results:

    • Mean arterial pressure (MAP) decreased initially in both W-HD and C-HD, but remained stable in C-HD thereafter, unlike W-HD.
    • Cardiac index (CI) and stroke index (SI) showed similar trends to MAP.
    • Systemic and pulmonary vascular resistance were higher during C-HD, correlating with improved cardiovascular stability and no hypotension symptoms.

    Conclusions:

    • Dialysate temperature significantly impacts intradialytic vascular stability.
    • Cooling dialysate enhances hemodynamic control and may explain better outcomes in hemofiltration compared to standard warm hemodialysis.