Retention of platelets by glass bead filters

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Retention of platelets by glass bead filters.

Whole blood was passed through glass bead filters and the retention of platelets studied under various experimental conditions. Platelet retention was similar over a wide range of blood flow rates; however, it was decreased at fast rates of flow. Platelet retention was not influenced by the haematocrit value of the blood over a wide range. Retention in filters containing siliconized beads was s...

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Platelet retention in glass bead columns: adhesion to glass and subsequent platelet-platelet interactions.

In normal heparinized blood, the retention of platelets in glass bead columns was low in the first 1 or 2 ml, increasing to more than 80% by the 4th or 5th ml. Prior flushing of the columns with platelet-poor plasma or saline lowered retention in all 5 ml. Additional studies were carried out with a two-stage procedure in which a sample of blood (A) was pumped through a column, immediately flush...

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Intracanal Retention of Glass Fiber Posts

  Objective: Fiber-reinforced composite (FRC) posts have recently become more popular for restoring endodontically treated teeth because of providing esthetics, better stress distribution and lower risk of root fracture. Resistance against tensile forces dislodging the post from the root canal is a prerequisite for these posts. This study aimed to evaluate the tensile retention (strength) of in...

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Comparison of platelet glass bead retention techniques in patients with clinical bleeding disorders.

Platelet glass bead retention by the Salzman and infusion pump techniques were compared in 36 control individuals, 10 patients with von Willebrand's syndrome and four patients with thrombocytopathies. No significant differences between the results of the two assays were observed. Eleven percent or less of the control individuals had diminished platelet glass bead retention. The mean percentage ...

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Platelet retention in glass bead columns: further evidence for the importance of ADP.

Plasma of normal heparinized blood contained 0.284 pM ± SD 0.097 (ADP + ATP) with an ATP:ADP ratio of 2.5:1. Plasma from thrombocytopenic blood contained only 0.106 pM ± 0.073 (ADP + ATP). Blood with normal platelet retention released 0.234 pM ± 0.187 (ADP + ATP) during passage through a glass bead column, with an ATP:ADP ratio of 1.6:1. Significantly less was released in blood with low retenti...

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ژورنال

عنوان ژورنال: Journal of Clinical Pathology

سال: 1967

ISSN: 0021-9746

DOI: 10.1136/jcp.20.5.710