Method and apparatus for thrombolytic therapy
First Claim
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1. A system for reperfusing an occluded vessel comprising:
- A. perfusion tube means having a proximal end and having a distal end for location in the vessel for enabling the introduction of a reperfusion agent to the occluded vessel,B. flow monitoring means including sensor means mounted to said perfusion tube means at said distal end thereof for generating a flow rate signal in response to blood flow through the vessel parallel to and past said perfusion tube means,C. comparing means for comparing the value of the flow rate signal with a set point signal representing a predetermined flow rate, andD. announcing means connected to said comparing means for announcing a flow rate signal that exceeds the predetermined flow rate thereby to announce the onset of blood flow through the vessel.
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Abstract
A method and system for facilitating thrombolytic therapy includes a perfusion tube, in the form of an infusion guidewire or catheter, for delivering a lytic agent at a thrombosis. The perfusion tube includes, as an integral part thereof, at its distal end a sensor that connects to monitoring and announcing circuit. The monitoring and announcing circuit may include local and remote audio and visual announcing mechanisms for indicating the existence of blood flow above a predetermined minimum flow rate thereby to indicate lysis.
30 Citations
25 Claims
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1. A system for reperfusing an occluded vessel comprising:
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A. perfusion tube means having a proximal end and having a distal end for location in the vessel for enabling the introduction of a reperfusion agent to the occluded vessel, B. flow monitoring means including sensor means mounted to said perfusion tube means at said distal end thereof for generating a flow rate signal in response to blood flow through the vessel parallel to and past said perfusion tube means, C. comparing means for comparing the value of the flow rate signal with a set point signal representing a predetermined flow rate, and D. announcing means connected to said comparing means for announcing a flow rate signal that exceeds the predetermined flow rate thereby to announce the onset of blood flow through the vessel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method for reperfusing a vessel occluded by a thrombosis using a lytic agent comprising the steps of:
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A. positioning the distal end of a perfusion tube with a flow sensor means into the vessel, B. administering the lytic agent in a continuous fashion through the perfusion tube into the vessel from the proximal end thereof, C. continuously energizing and monitoring the flow sensor means to determine blood flow rate through the vessel parallel to and past said perfusion tube means, D. announcing the onset of blood flow through the vessel above a predetermined flow rate, and E. discontinuing the administration of the lytic agent in response to said announcement. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25)
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Specification