Method for determining the effectiveness of a medical therapy by analysis of collateral vessels
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United States of America Patent
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Mar 27, 2007
Grant Date -
Nov 25, 2004
app pub date -
May 23, 2003
filing date -
May 23, 2003
priority date (Note) -
Expired
status (Latency Note)
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Abstract
In a method for determining the effectiveness of a therapy for alleviating a constriction in a blood vessel, the functioning of collateral vessels naturally formed at the constriction is analyzed. The analysis takes place by making a blood flow measurement at the vessel in which the constriction is present, or at a complementary vessel, with the patient experiencing two different stress conditions. The flow measurement can ensue by magnetic resonance or using ultrasound. Comparison of the stress-dependent blood flow to a reference is then undertaken to determine whether the collateral vessels are functioning effectively, and thus whether the treatment for alleviating the constriction is effective.
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