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Intradialytic hypotension.

Ambreen Gul1, Dana Miskulin, Antonia Harford

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Intradialytic hypotension (IDH) is a serious complication in dialysis patients, linked to higher mortality. Strategies like dialysate cooling and limiting sodium can reduce its occurrence.

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Area of Science:

  • Nephrology
  • Clinical Medicine
  • Dialysis Technology

Background:

  • Intradialytic hypotension (IDH) is a frequent complication during hemodialysis.
  • The severity and frequency of IDH correlate with adverse clinical outcomes and increased mortality risk.
  • High interdialytic weight gain (IDWG) is frequently observed in patients experiencing IDH.

Purpose of the Study:

  • To review recent advancements in understanding intradialytic hypotension (IDH).
  • To identify and discuss measures that can effectively reduce the incidence of IDH.
  • To highlight the prognostic implications of frequent IDH.

Main Methods:

  • Review of recent scientific literature on intradialytic hypotension.
  • Analysis of clinical outcomes associated with varying blood pressure nadirs during dialysis.
  • Evaluation of interventions aimed at preventing or reducing IDH.

Main Results:

  • Specific systolic blood pressure (SBP) thresholds (<90/<100 mmHg nadir, ≤159/≥160 mmHg predialysis) are linked to the highest mortality risks.
  • Interdialytic weight gain (IDWG) of ≥3 kg is more common in patients with IDH.
  • Promising results observed with prolonged/frequent dialysis, biofeedback devices, and dialysate cooling.

Conclusions:

  • Frequent IDH is associated with poor prognosis and high IDWGs.
  • Interventions such as cooled dialysate and biofeedback show potential for reducing IDH frequency.
  • IDH remains a significant dialysis complication requiring further research.