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Platelet function in blood sampled through heart catheters.

Acta Medica Scandinavica

|January 1, 1984

Summary

Heart catheter material impacts platelet function. Polyurethane catheters showed minimal effects on platelet retention and aggregation, suggesting they are suitable for studying platelet function in circulation.

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Area of Science:

Cardiovascular Science
Hematology
Biomaterials Science

Background:

Platelet function is crucial for hemostasis and thrombosis.
Indwelling medical devices, such as heart catheters, can interact with blood components.
Understanding the impact of catheter materials on platelet function is essential for patient safety and accurate diagnostic testing.

Purpose of the Study:

To investigate the effects of different heart catheter materials on platelet function.
To compare the influence of polyurethane versus woven dacron catheters on platelet retention and aggregation.
To assess the suitability of various catheter types for studying platelet function in clinical settings.

Main Methods:

Blood samples were collected from the caval vein of 56 patients using various heart catheters (polyurethane: Cordis, Positrol; woven dacron: Sones, Zucker).
Platelet retention and aggregation were measured.
Plasma beta-thromboglobulin levels were assessed.
Reproducibility of platelet function parameters was evaluated with repeated sampling.

Main Results:

Reduced platelet retention was the most consistent finding across different catheter types.
Polyurethane catheters (Cordis, Positrol) exhibited less impact on platelet function compared to woven dacron catheters (Sones, Zucker).
Sones catheters caused a slight increase in plasma beta-thromboglobulin, while Zucker catheters trapped some platelets. Heparinized and non-heparinized catheters showed similar reductions in platelet retention.

Conclusions:

Polyurethane heart catheters have a minimal influence on platelet function, making them suitable for clinical studies.
Woven dacron catheters demonstrate a more significant, though still moderate, impact on platelet function.
The study highlights the importance of catheter material selection for accurate assessment of platelet function in patients.

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