Trial reportBMC nephrology2026
Haemodynamic effects of low versus high dialysate temperature in haemodialysis patients: a single-blinded, randomised, cross-over study.
Trial report in BMC nephrology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT05052151 (Hemodynamic Effects of Low vs. High Dialysate Temperature or Bicarbonate Concentration in Chronic Hemodialysis Patients), which is not on this map. Not yet cited in PubMed.
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The trial behind it
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Hemodynamic Effects of Low vs. High Dialysate Temperature or Bicarbonate Concentration in Chronic Hemodialysis Patients
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5 authors.
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Abstract
backgroundCooling of the dialysate may improve intradialytic haemodynamics. This study compared low dialysate temperature (LDT) of 35 °C with high dialysate temperature (HDT) of 37 °C (standard) in terms of blood pressure (BP), intradialytic haemodynamics, and orthostatic BP.
methodsIn a single-blind, randomised, controlled, crossover study fourteen haemodialysis (HD) patients underwent a 4-h HD session with LDT (35 °C) or HDT (37 °C) separated by a 1- week interval. BP was monitored throughout HD. Intradialytic haemodynamics were assessed with ultrasound dilution technique (Transonic). Orthostatic BP was measured pre- and postHD.
resultsUltrafiltration (mean with 95% confidence interval) was similar (LDT: 2.6(2.3;2.9) vs. HDT: 2.5(2.0;3.1) liters). Arterial line temperature as a marker of body temperature remained stable with LDT but increased with HDT (mean change LDT: 0.0(-0.2;0.1) vs. HDT: 0.4(0.2;0.6)°C) with a mean between intervention difference of -0.4(-0.6;-0.3)°C. BP remained relatively stable on LDT, whereas HDT caused a significantly larger fall in systolic BP. The mean (± SD) fall in intradialytic systolic BP (PreHD vs. lowest intradialytic) was 20.3 ± 10.5 mmHg (HDT) and 9.6 ± 8.8 mmHg (LDT) with a mean between intervention difference of 10.7(3.2; 17.9) mmHg. LDT caused a significantly lower intradialytic heart rate which by the end of dialysis (after 230 min) on average was - 6.6(-13.0;-0.2) beats/min lower than HDT. Overall, the intradialytic hemodynamic response was similar except for a trend towards higher peripheral resistance and central blood volume with LDT. There was a significantly greater fall in orthostatic systolic BP after dialysis compared with preHD, but there was no significant difference between interventions and the frequency of orthostatic hypotension postHD was also similar (HDT: 54% and LDT: 43%; P = 0.57).
conclusionCooler vs. standard dialysate temperature resulted in significantly higher intradialytic BP but had no significant impact on orthostatic BP response postHD.
trial registrationThe study was registered at ClinicalTrials.gov where the full study protocol is available (NCT05052151). Registration date was 26/08 2021.
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