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Controller for an atherectomy device

A technique for atheromatous plaque and resection, which is applied in the direction of surgical cutting instruments, surgery, instruments, etc., and can solve the problems of high cost and complicated controller machinery.

Inactive Publication Date: 2015-04-01
CARDIOVASCULAR SYST INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Controllers for this air system are mechanically complex and can be very expensive

Method used

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  • Controller for an atherectomy device
  • Controller for an atherectomy device
  • Controller for an atherectomy device

Examples

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Embodiment Construction

[0034] An atherectomy device rotationally driven by an electric motor is disclosed. In some designs, the device includes features not available on gas turbine drive systems, such as storing in memory low / medium / high preset rotational speeds for a particular model of handle, calculating the volume and associated alarms when it gets low enough, and automatically adjusts the IV pump speed to a predetermined or calculated level when the rotational speed of the motor changes. Electric motors have more rotational inertia than comparable gas turbines, so the system includes control mechanisms that help prevent damage from excessive torque applied to the distal end of the drive shaft. When an obstacle is detected at the distal end, by slowing down the motor rotation speed, the motor is released and allowed to spin freely as a flywheel. The free spinning motor allows the large angular momentum of the system to be quickly and safely dissipated without excessive torque on the drive shaf...

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Abstract

A rotational atherectomy system may include an elongated, flexible drive shaft having a distal end for insertion into a vasculature of a patient and having a proximal end opposite the distal end remaining outside the vasculature of the patient, an electric motor rotatably coupled to the proximal end of the drive shaft, the electric motor being capable of rotating the drive shaft, and control electronics, wherein the control electronics comprise a computer readable storage medium in communication with a processor, the computer readable storage medium having software stored thereon for monitoring and controlling the rotation of the electric motor and for monitoring and controlling delivery of saline to the drive shaft.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of Provisional Application Serial No. 61 / 613,137, entitled Motor Control for Orbital Atherectomy Devices, filed March 20, 2012, which is also incorporated herein in its entirety. technical field [0003] The present invention relates to devices and methods for removing tissue from bodily passages, such as removing atherosclerotic plaque from an artery using a rotational atherectomy device. In particular, the present invention relates to controller improvements in rotary atherectomy devices having electric motors. Background technique [0004] Atherectomy is the process of opening a blocked coronary artery or vein graft using a device on the end of a catheter to cut or scrape away atherosclerotic plaque (a buildup of fat and other material that builds up in the lining of the artery wall). deposits) non-surgical procedures. For the purposes of this application, the term "abrasive" i...

Claims

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Application Information

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IPC IPC(8): A61B17/3207
CPCA61B17/320758A61B2017/00017A61B2017/00132A61B2017/00199A61B2017/320004A61B2017/320766A61B2217/007A61B2090/0814G06F13/10A61B2017/00022
Inventor 维克多·舍妮乔·希金斯迈克·格蕾丝克雷格·克拉基瑞安·韦尔蒂
Owner CARDIOVASCULAR SYST INC
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