Endovascular access and guidance system utilizing divergent beam ultrasound
First Claim
1. An endovascular access and guidance system, comprising:
- an elongate flexible member configured to access the venous vasculature of a patient;
a sensor at a distal end of the elongate flexible member, the sensor being configured to provide in vivo non-image based ultrasound information of the venous vasculature of the patient;
a processor configured to;
receive the in vivo non-image based ultrasound information of the venous vasculature of the patient provided by the sensor,determine, from the in vivo non-image based ultrasound information of the venous vasculature of the patient, a first velocity of blood flow away from the sensor and a second velocity of blood flow towards the sensor at a single point in time,compare the first velocity of blood flow away from the sensor and the second velocity of blood flow towards the sensor to one or more stored velocity patterns; and
determine, based on the comparison of the first velocity of blood flow away from the sensor and the second velocity of blood flow towards the sensor to the one or more stored velocity patterns, when the sensor is;
moving in a direction with a flow within the venous vasculature of the patient,moving in a direction against a flow within the venous vasculature of the patient, andin proximity of a predetermined structure within the venous vasculature of the patient; and
enable output of;
a first indication when the processor determines that the sensor is moving in the direction with the flow within the venous vasculature of the patient,a second indication, different from the first indication, when the processor determines that the sensor is moving in the direction against the flow within the venous vasculature of the patient, anda third indication, different from the first indication and the second indication, when the processor determines that the sensor is in proximity of the predetermined structure within the venous vasculature of the patient.
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Abstract
The invention relates to the guidance, positioning and placement confirmation of intravascular devices typically inserted percutaneously into the venous or arterial vasculature. An endovenous access and guidance system is described that includes an elongate flexible member adapted and configured to access the venous vasculature of a patient; a sensor disposed at a distal end of the elongate flexible member and configured to provide in vivo non-image based ultrasound information of the venous vasculature of the patient; a processor configured to receive and process in vivo non-image based ultrasound information of the venous vasculature of the patient provided by the sensor and to provide position information regarding the position of the distal end of the elongate flexible member within the venous vasculature of the patient; and an output device adapted to output the position information from the processor.
200 Citations
46 Claims
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1. An endovascular access and guidance system, comprising:
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an elongate flexible member configured to access the venous vasculature of a patient; a sensor at a distal end of the elongate flexible member, the sensor being configured to provide in vivo non-image based ultrasound information of the venous vasculature of the patient; a processor configured to; receive the in vivo non-image based ultrasound information of the venous vasculature of the patient provided by the sensor, determine, from the in vivo non-image based ultrasound information of the venous vasculature of the patient, a first velocity of blood flow away from the sensor and a second velocity of blood flow towards the sensor at a single point in time, compare the first velocity of blood flow away from the sensor and the second velocity of blood flow towards the sensor to one or more stored velocity patterns; and determine, based on the comparison of the first velocity of blood flow away from the sensor and the second velocity of blood flow towards the sensor to the one or more stored velocity patterns, when the sensor is; moving in a direction with a flow within the venous vasculature of the patient, moving in a direction against a flow within the venous vasculature of the patient, and in proximity of a predetermined structure within the venous vasculature of the patient; and enable output of; a first indication when the processor determines that the sensor is moving in the direction with the flow within the venous vasculature of the patient, a second indication, different from the first indication, when the processor determines that the sensor is moving in the direction against the flow within the venous vasculature of the patient, and a third indication, different from the first indication and the second indication, when the processor determines that the sensor is in proximity of the predetermined structure within the venous vasculature of the patient. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. An endovascular access and guidance system, comprising:
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an elongate flexible member configured to access the venous vasculature of a patient; a sensor at a distal end of the elongate flexible member, the sensor being configured to provide in vivo non-image based ultrasound information of the venous vasculature of the patient; a processor configured to; receive the in vivo non-image based ultrasound information of the venous vasculature of the patient provided by the sensor, determine, from the in vivo non-image based ultrasound information of the venous vasculature of the patient, a first velocity of blood flow away from the sensor and a second velocity of blood flow towards the sensor at a single point in time, compare the first velocity of blood flow away from the sensor and the second velocity of blood flow towards the sensor to one or more stored velocity patterns; and determine, based on the comparison of the first velocity of blood flow away from the sensor and the second velocity of blood flow towards the sensor to the one or more stored velocity patterns, when the sensor is; moving in a direction towards a heart of the patient within the venous vasculature of the patient, moving in a direction away from the heart of the patient within the venous vasculature of the patient, and in proximity of a predetermined structure of the heart of the patient within the venous vasculature of the patient; and enable output of; a first indication when the processor determines that the sensor is moving in the direction towards the heart within the venous vasculature of the patient, a second indication different from the first indication when the processor determines that the sensor is moving in the direction away from the heart within the venous vasculature of the patient, and a third indication different from the first indication and the second indication when the processor determines that the sensor is in proximity of the predetermined structure of the heart within the venous vasculature of the patient. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46)
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Specification