US-12616496-B2 - Atherectomy system with anterograde and retrograde ablation

Abstract

An atherectomy system includes an advancer assembly and a drive assembly that is adapted to translate relative to the advancer assembly. A control knob extends from the drive assembly such that translating the control knob results in the drive assembly translating relative to the advancer assembly. A drive shaft is operably coupled with the drive assembly, the drive shaft translating relative to the advancer assembly as the drive assembly translates relative to the advancer assembly. A feedback modifier is operably coupled between the drive assembly and the advancer assembly and is adapted to provide a user of the atherectomy system with similar feedback via the control knob regardless of whether the user is moving the drive assembly in an anterograde ablation direction or a retrograde ablation direction.

Inventors

• DANIEL FRANK MASSIMINI
• MICHAEL KALAND
• CORYDON CARLSON
• JARROD KENNETH NEUHARTH

Assignees

• BOSTON SCIENTIFIC SCIMED, INC.

Dates

Publication Date

20260505

Application Date

20220823

Claims (17)

1. 1 . An atherectomy system, comprising: an advancer assembly; a drive assembly adapted to translate relative to the advancer assembly; a control knob extending from the drive assembly such that translating the control knob results in the drive assembly translating relative to the advancer assembly; a drive shaft operably coupled with the drive assembly, the drive shaft translating relative to the advancer assembly as the drive assembly translates relative to the advancer assembly; and a feedback modifier operably coupled between the drive assembly and the advancer assembly, the feedback modifier adapted to provide a user of the atherectomy system with similar feedback via the control knob regardless of whether the user is moving the drive assembly in an anterograde ablation direction or a retrograde ablation direction; wherein the feedback modifier comprises: a ferrofluidic coupler having a ferrofluidic fluid that can pass through an orifice within the ferrofluidic coupler; a sensor adapted to provide a condition signal indicative of a current driveshaft condition; and a ferrofluidic controller operably coupled with the sensor and the ferrofluidic coupler, the ferrofluidic controller adapted to provide an instruction signal to the ferrofluidic coupler, based at least in part upon the condition signal, to modify a force felt by the user.
2. 2 . The atherectomy system of claim 1 , wherein the drive shaft comprises a coil spring having a first set of properties when the coil spring is in compression while ablating in the anterograde ablation direction and a second set of properties when the coil spring is in tension while ablating in the retrograde ablation direction.
3. 3 . The atherectomy system of claim 1 , wherein the feedback modifier is adapted to have little or no impact on the feedback provided to the user when the user moves the drive assembly slowly or with low force.
4. 4 . The atherectomy system of claim 3 , wherein the feedback modifier is adapted to have relatively greater impact on the feedback provided to the user when the user moves the drive assembly more quickly or with high force.
5. 5 . The atherectomy system of claim 1 , wherein the feedback modifier is adapted to have little or no impact on the feedback provided to the user when the user moves the drive assembly in the anterograde ablation direction.
6. 6 . The atherectomy system of claim 5 , wherein the feedback modifier is adapted to have relatively greater impact on the feedback provided to the user when the user moves the drive assembly in the retrograde ablation direction.
7. 7 . The atherectomy system of claim 1 , wherein the instruction signal instructs the ferrofluidic coupler to change a viscosity of the ferrofluidic fluid.
8. 8 . The atherectomy system of claim 1 , further comprising an atherectomy burr adapted for both anterograde ablation and retrograde ablation.
9. 9 . The atherectomy system of claim 8 , wherein the atherectomy burr comprises: a tapered body including a proximal taper and a distal taper; a first ablating surface disposed on the proximal taper for retrograde ablation; and a second ablating surface disposed on the distal taper for anterograde ablation.
10. 10 . An atherectomy system, comprising: an advancer assembly; a drive assembly adapted to translate relative to the advancer assembly; a control knob extending from the drive assembly such that translating the control knob results in the drive assembly translating relative to the advancer assembly; a drive shaft operably coupled with the drive assembly, the drive shaft translating relative to the advancer assembly as the drive assembly translates relative to the advancer assembly; and a feedback modifier operably coupled between the drive assembly and the advancer assembly, the feedback modifier adapted to provide a user of the atherectomy system with similar feedback via the control knob regardless of whether the user is moving the drive assembly in an anterograde ablation direction or a retrograde ablation direction; wherein the feedback modifier comprises: an electro hydraulic coupler having hydraulic fluid that can pass through an orifice having an adjustable diameter; a sensor adapted to provide a condition signal indicative of a current driveshaft condition; and an electro hydraulic controller operably coupled with the sensor and the electro hydraulic coupler, the electro hydraulic controller adapted to provide an instruction signal, based at least upon the condition signal, to the electro hydraulic coupler to adjust the diameter of the orifice to modify a force felt by the user.
11. 11 . The atherectomy system of claim 10 , wherein the drive shaft comprises a coil spring having a first set of properties when the coil spring is in compression while ablating in the anterograde ablation direction and a second set of properties when the coil spring is in tension while ablating in the retrograde ablation direction.
12. 12 . The atherectomy system of claim 10 , wherein the feedback modifier is adapted to have little or no impact on the feedback provided to the user when the user moves the drive assembly slowly or with low force.
13. 13 . The atherectomy system of claim 12 , wherein the feedback modifier is adapted to have relatively greater impact on the feedback provided to the user when the user moves the drive assembly more quickly or with high force.
14. 14 . The atherectomy system of claim 10 , wherein the feedback modifier is adapted to have little or no impact on the feedback provided to the user when the user moves the drive assembly in the anterograde ablation direction.
15. 15 . The atherectomy system of claim 14 , wherein the feedback modifier is adapted to have relatively greater impact on the feedback provided to the user when the user moves the drive assembly in the retrograde ablation direction.
16. 16 . The atherectomy system of claim 10 , further comprising an atherectomy burr adapted for both anterograde ablation and retrograde ablation.
17. 17 . The atherectomy system of claim 16 , wherein the atherectomy burr comprises: a tapered body including a proximal taper and a distal taper; a first ablating surface disposed on the proximal taper for retrograde ablation; and a second ablating surface disposed on the distal taper for anterograde ablation.

Description

RELATED APPLICATIONS This application claims the benefit of priority under 35 U. S.C. § 119 of U.S. Provisional Application No. 63/237,679, filed Aug. 27, 2021, the entire disclosure of which is hereby incorporated by reference. TECHNICAL FIELD The present disclosure pertains to medical devices, and methods for manufacturing and using medical devices. More particularly, the disclosure is directed to devices and methods for removing occlusive material from a body lumen. Further, the disclosure is directed to an atherectomy device for forming a passageway through an occlusion of a body lumen, such as a blood vessel. BACKGROUND A wide variety of medical devices have been developed for medical use, for example, for use in accessing body cavities and interacting with fluids and structures in body cavities. Some of these devices may include guidewires, catheters, pumps, motors, controllers, filters, grinders, needles, valves, and delivery devices and/or systems used for delivering such devices. These devices are manufactured by any one of a variety of different manufacturing methods and may be used according to any one of a variety of methods. Of the known medical devices and methods, each has certain advantages and disadvantages. SUMMARY This disclosure provides design, material, manufacturing method, and use alternatives for medical devices. As an example, an atherectomy system includes an advancer assembly and a drive assembly that is adapted to translate relative to the advancer assembly. A control knob extends from the drive assembly such that translating the control knob results in the drive assembly translating relative to the advancer assembly. A drive shaft is operably coupled with the drive assembly and translates relative to the advancer assembly as the drive assembly translates relative to the advancer assembly. A feedback modifier is operably coupled between the drive assembly and the advancer assembly and is adapted to provide a user of the atherectomy system with similar feedback via the control knob regardless of whether the user is moving the drive assembly in an anterograde ablation direction or a retrograde ablation direction. Alternatively or additionally, the drive shaft may include a coil spring having a first set of properties when the coil spring is in compression while ablating in the anterograde ablation direction and a second set of properties when the coil spring is in tension while ablating in the retrograde ablation direction. Alternatively or additionally, the feedback modifier may be adapted to have little or no impact on the feedback provided to the user when the user moves the drive assembly slowly or with low force. Alternatively or additionally, the feedback modifier may be adapted to have relatively greater impact on the feedback provided to the user when the user moves the drive assembly more quickly or with high force. Alternatively or additionally, the feedback modifier may be adapted to have little or no impact on the feedback provided to the user when the user moves the drive assembly in the anterograde ablation direction. Alternatively or additionally, the feedback modifier may be adapted to have relatively greater impact on the feedback provided to the user when the user moves the drive assembly in the retrograde ablation direction. Alternatively or additionally, the feedback modifier may include a spring and a dash pot. Alternatively or additionally, the feedback modifier may include a non-Newtonian damper. Alternatively or additionally, the feedback modifier may include a first magnet secured relative to the advancer assembly and a second magnet secured relative to the drive assembly such that the first magnet and the second magnet repel each other when the drive assembly is moved in a retrograde ablation direction. Alternatively or additionally, the first magnet and the second magnet each include a North pole and a South pole and the first magnet and the second magnet are arranged such that either the North pole of the first magnet faces the North pole of the second magnet or the South pole of the first magnet faces the South pole of the second magnet. Alternatively or additionally, the feedback modifier may include a ferrofluidic coupler having a ferrofluidic fluid that can pass through an orifice within the ferrofluidic coupler, a sensor adapted to provide a condition signal indicative of a current driveshaft condition and a ferrofluidic controller operably coupled with the sensor and the ferrofluidic coupler and adapted to provide an instruction signal to the ferrofluidic coupler, based at least in part upon the condition signal, to modify a force felt by the user. Alternatively or additionally, the instruction signal may instruct the ferrofluidic coupler to change a viscosity of the ferrofluidic fluid. Alternatively or additionally, the feedback modifier may include an electro hydraulic coupler having hydraulic fluid that can pass through an orifice having an adj