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Ultrasonic coagulation timer

  • US 4,014,650 A
  • Filed: 04/25/1975
  • Issued: 03/29/1977
  • Est. Priority Date: 04/25/1975
  • Status: Expired due to Term
First Claim
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1. A method of measuring the coagulation time of a solution containing whole blood or blood plasma, comprising:

  • directing ultrasound toward said solution and receiving the scattered ultrasound;

    mixing a predetermined quantity of thrombin with said solution;

    examining the scattered ultrasound for an indication that said solution has coagulated; and

    measuring the elapsed tine between the mixing of thrombin with said solution and the coagulation of said solution.

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