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Related Experiment Videos

Continuous pulse-oxymetry during haemodialysis.

Y Gilli1, U Binswanger

  • 1Department of Internal Medicine, University Hospital, Zürich, Switzerland.

Nephron
|January 1, 1990
PubMed
Summary

Continuous monitoring revealed a significant drop in arterial oxygen saturation (SaO2) during hemodialysis in chronic renal failure patients. This decline occurred early in treatment and was influenced by dialysis buffer type.

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Area of Science:

  • Nephrology
  • Cardiovascular Physiology
  • Medical Technology

Background:

  • Chronic renal failure patients undergoing hemodialysis often experience physiological changes.
  • Monitoring arterial oxygen saturation (SaO2) is crucial for patient safety during treatment.
  • Non-invasive methods allow for continuous assessment of SaO2 during hemodialysis.

Purpose of the Study:

  • To continuously measure arterial oxygen saturation (SaO2) non-invasively in patients with chronic renal failure during hemodialysis.
  • To identify patterns and quantify changes in SaO2 during hemodialysis sessions.
  • To investigate factors influencing SaO2 variations, including filter type and buffer composition.

Main Methods:

  • Continuous, non-invasive measurement of SaO2 using a monitoring device.
  • Hemodialysis performed three times weekly using either polysulfone (F60) or cuprophane (D2) filters.
  • Analysis of 48 SaO2 curves from 18 patients with chronic renal failure.

Main Results:

  • A significant mean decline in SaO2 of 1.9% was observed compared to predialysis values.
  • In 7 patients, SaO2 declined by 1.5-4.2% within 15-60 minutes of initiating hemodialysis.
  • Acetate dialysis showed a greater initial decrease in SaO2 compared to bicarbonate dialysis; filter type and dialyzer reuse did not significantly impact SaO2 changes.

Conclusions:

  • Hemodialysis can lead to a significant decrease in arterial oxygen saturation, particularly early in the procedure.
  • The type of dialysis buffer (acetate vs. bicarbonate) influences the initial SaO2 drop.
  • Further research is needed to understand and mitigate SaO2 fluctuations during hemodialysis.

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