Systems and methods for aspiration and monitoring
Inventors
CULBERT, BRADLEY S. • Look, David M. • Carlson, Gary
Assignees
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Publication Number
US-10716880-B2
Publication Date
2020-07-21
Expiration Date
Abstract
A system for aspiration includes an aspiration catheter including an elongate shaft including an aspiration lumen, and an open distal end, an extension tube, the lumen of the extension tube configured to be hydraulically coupled to the aspiration lumen, a peristaltic pump configured for driving fluid through the extension tube, a compressible portion disposed between the distal end and the proximal end of the extension tube, the compressible portion configured to be coupled to the peristaltic pump, such that operation of the peristaltic pump drives fluid from the aspiration lumen from the distal end of the extension tube to the proximal end of the extension tube, and a controller configured to receive a first signal from the first sensor and configured to vary the operation of the peristaltic pump based at least in part on a first signal received from a first sensor coupled to the aspiration lumen or extension tube related to a change in the characteristic of flow.
Core Innovation
The disclosure describes a catheter-based aspiration system in which an aspiration catheter with an elongate shaft is configured for placement within a blood vessel of a subject. The aspiration catheter includes an aspiration lumen having a proximal end and an open distal end, and an extension tube having a lumen configured to be hydraulically coupled to the aspiration lumen at or adjacent the proximal end of the aspiration lumen.
The system drives fluid through the extension tube with a peristaltic pump. The peristaltic pump includes a pump base having a pressure shoe and a rotatable head including two or more compression elements arranged therearound, and a compressible tubular portion disposed between the distal end and the proximal end of the extension tube is coupled to the pressure shoe and the rotatable head, such that operation of the peristaltic pump rotates the rotatable head and the compression elements drive fluid from the aspiration lumen through the extension tube.
The system includes a first sensor configured to sense a location between the peristaltic pump and the open distal end of the aspiration lumen when the compressible tubular portion is coupled to the pressure shoe and the rotatable head of the peristaltic pump. The first sensor directly measures a characteristic of flow through at least one of the aspiration lumen or the lumen of the extension tube, where the flow characteristic comprises at least one of pressure, a flow rate, or a flow velocity.
A controller receives a first signal from the first sensor and varies operation of the peristaltic pump based at least in part on the first signal related to a change in the characteristic of flow.
Claims Coverage
The independent claim describes a catheter-based aspiration system with peristaltic pumping, direct sensing of a flow characteristic between the peristaltic pump and the open distal end, and a controller varying pump operation based on that sensed flow change. The claim set presents five inventive features.
Catheter-based aspiration with aspiration lumen and extension tube
An aspiration catheter with an elongate shaft configured for placement within a blood vessel, including an aspiration lumen having a proximal end and an open distal end, and an extension tube with distal and proximal ends and a lumen coupled hydraulically to the aspiration lumen at or adjacent the proximal end.
Peristaltic pump with pressure shoe and rotatable head compression elements
A peristaltic pump configured for driving fluid through the extension tube, comprising a pump base having a pressure shoe and a rotatable head including two or more compression elements arrayed therearound.
Compressible tubular portion coupled to pressure shoe and rotatable head
A compressible tubular portion disposed between the distal end and the proximal end of the extension tube, coupled to the pressure shoe and the rotatable head such that operation rotates the rotatable head and the compression elements drive fluid from the aspiration lumen through the extension tube.
Direct flow characteristic sensing between pump and open distal end
A first sensor configured to sense a location between the peristaltic pump and the open distal end of the aspiration lumen, the first sensor directly measuring a flow characteristic through at least one of the aspiration lumen or the lumen of the extension tube, where the flow characteristic comprises at least one of pressure, flow rate, or flow velocity.
Controller varying peristaltic pump operation based on sensed flow change
A controller configured to receive a first signal from the first sensor and vary the operation of the peristaltic pump based at least in part on the first signal related to a change in the characteristic of flow.
The inventive contribution is the combination of a catheter-based aspiration pathway with a peristaltic pump using a pressure shoe, a rotatable head with compression elements, a coupled compressible tubular portion, and a first sensor that directly measures a flow characteristic between the pump and the open distal end, with a controller varying pump operation based on changes in that sensed flow characteristic.
Stated Advantages
Not explicitly described in patent.
Documented Applications
Not explicitly described in patent.
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