System and method of uniformly delivering ultrasonic energy
AssigneeOtsuka Medical Devices Co., Ltd.
InventorRobin Bek
Life of this patent
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Abstract
A tissue treatment system includes a catheter and a generator. The catheter is configured to be introduced into a blood vessel. The catheter includes an ultrasound transducer disposed at a distal end portion of the catheter to emit an unfocused ultrasound energy to treat a target tissue from the blood vessel. The generator is configured to drive the ultrasound transducer with a frequency. The generator is configured to control the frequency to change during the treatment of the target tissue. Other embodiments are also described and claimed.
Claims36
A tissue treatment system, comprising:
- a catheter configured to be introduced into a blood vessel and including an ultrasound transducer disposed at a distal end portion of the catheter to emit an unfocused ultrasound energy by emitting several standing lobes at different longitudinal locations to treat a target tissue from the blood vessel;
- and
- a generator configured to drive the ultrasound transducer with a frequency, wherein the generator is configured to control the frequency to change during the treatment of the target tissue, wherein the standing lobes combine to form one or more energy lobes.
A tissue treatment system, comprising:
- an input device configured to receive, from a catheter, data representing a target frequency at which an ultrasonic transducer mounted on a distal end of the catheter emits unfocused ultrasonic energy during use;
- and
- one or more processors configured to
- determine, based on the data, a range of frequencies, and
- drive the ultrasonic transducer over the range of frequencies, wherein the catheter emits unfocused ultrasonic energy by emitting several standing lobes at different longitudinal locations, and wherein the standing lobes combine to form one or more energy lobes.
A method of treating tissue of a target vessel, comprising:
- receiving, from a catheter, data representing a target frequency at which an ultrasonic transducer mounted on a distal end of the catheter emits unfocused ultrasonic energy during use;
- determining, based on the target frequency, a range of frequencies;
- and
- driving the ultrasonic transducer over the range of frequencies to emit several standing lobes at different longitudinal locations that combine to form one or more energy lobes.
A non-transitory computer readable medium storing instructions, which when executed by one or more processors of a tissue treatment system, causes the tissue treatment system to perform a method comprising:
- receiving, from a catheter, data representing a target frequency at which an ultrasonic transducer mounted on a distal end of the catheter emits unfocused ultrasonic energy during use;
- determining, based on the target frequency, a range of frequencies;
- and
- driving the ultrasonic transducer over the range of frequencies to emit several standing lobes at different longitudinal locations that combine to form one or more energy lobes.
A method of treating tissue of a target vessel, comprising:
- receiving, from a catheter, data representing a target frequency at which an ultrasonic transducer mounted on a distal end of the catheter emits unfocused ultrasonic energy during use;
- determining, based on the target frequency, a range of frequencies;
- and
- driving the ultrasonic transducer over the range of frequencies;
- and
- applying energy through closely-spaced lobes to produce ablation around a circumference of a blood vessel, wherein the lobes spread out across the ultrasonic transducer, wherein the closely-spaced lobes generate a plurality of pressure nodes spaced apart from each other by no more than 0.5 mm, each pressure node having a pressure of at least 0.25 MPa.
A non-transitory computer readable medium storing instructions, which when executed by one or more processors of a tissue treatment system, causes the tissue treatment system to perform a method comprising:
- receiving, from a catheter, data representing a target frequency at which an ultrasonic transducer mounted on a distal end of the catheter emits unfocused ultrasonic energy during use;
- determining, based on the target frequency, a range of frequencies;
- driving the ultrasonic transducer over the range of frequencies;
- and
- applying energy through closely-spaced lobes to produce ablation around a circumference of a blood vessel, wherein the closely-spaced lobes generate a plurality of pressure nodes spaced apart from each other by no more than 0.5 mm, each pressure node having a pressure of at least 0.25 MPa.
Dependencies are inferred from the claim text.