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- W1985128879 abstract "We evaluated the suitability of low molecular weight (LMW) heparin as an anticoagulant for in vitro platelet function tests in 11 normal volunteers. Results with citrated platelets were considered as the standard. Spontaneous platelet aggregation and the aggregation responses to ADP, epinephrine, collagen, ristocetin and thrombin were measured turbid imetrically in an aggregometer. Dose-response and dose-rate curves were constructed for ADP- and epinephrine-induced aggregation. The maximum aggregation response (EDmax) and rate (EDRmax), and the estimated dose of agonist to induce 50% of the maximum response (ED50) and rate (EDR50) were calculated from these curves. The inhibition of ADP-induced aggregation with PGI2 was expressed as per cent inhibition. The release of ATP and TxA2 from platelets aggregated with collagen was measured. No spontaneous aggregation occured with either anticoagulant. The ED50 and the EDR50 for heparinized platelets were significantly lower for ADP induced aggregation (0.8±0.3μM vs 2.1±1.0μM [p=0.001] and 0.4±0.1μM vs 0.8±0.3μM [p=0.003]). The EDRmax with ADP was significantly higher (p=0.004) for heparinized platelets (64±17.0 units/ml vs 50.4±7.6 units/ml). The heparinized platelets aggregated slighty, but significantly, less in response to ristocetin than the citrated platelets. The response of washed heparinized and citrated platelets to thrombin was not significantly different. The per cent inhibition of ADP aggregation with PGI2, was significantly lower with heparinized platelets. The release of TxA2 and ATP was similar for both anticoagulants. These results indicate that LMW heparin is a satisfactory anticoagulant for platelet aggregation tests." @default.
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- W1985128879 date "1990-02-01" @default.
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- W1985128879 title "Low molecular weight heparin as an anticoagulant for in vitro platelet funtion studies" @default.
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- W1985128879 doi "https://doi.org/10.1016/0049-3848(90)90077-p" @default.
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