Spacer insertion instrument
First Claim
1. An instrument for inserting and deploying an interspinous spacer having a body with at least one prong receiving portion and a wing rotatably connected to the body portion, wherein the wing is configured to cradle an adjacent spinous process, the instrument comprising:
- a handle,a first assembly connected to the handle, the first assembly comprising an outer shaft, an inner shaft located inside the outer shaft, at least one prong at a distal portion of one of the outer or inner shafts, and a control configured to move one of the outer or inner shafts with respect to the other and thereby deflect the prong into engagement with the prong receiving portion of the body of the interspinous spacer, wherein the body of the interspinous spacer is prevented from rotating with respect to the prong when the prong engages the prong receiving portion; and
a driver having a distal portion configured to arrange the interspinous spacer, and wherein the driver is axially displaceable relative to the first assembly independent of (a) rotation of the driver about an axis of rotation defined by the first assembly such that the driver moves relative to the prong to deploy the interspinous spacer and (b) operation of the control.
2 Assignments
0 Petitions
Accused Products
Abstract
A percutaneous and minimally invasive instrument for inserting an interspinous process spacer into a patient is disclosed. The insertion instrument includes a first assembly connected to a handle assembly. The first assembly includes an inner shaft located inside an outer shaft; the inner and outer shafts being configured for relative translational motion with respect to each other to thereby deflect at least one prong formed on one of the inner or outer shafts wherein such deflection causes engagement with a juxtapositioned interspinous spacer. The instrument further includes a driving tool configured for removable insertion into a proximal end of a passageway of the instrument. The driving tool has a distal spacer engaging portion configured to engage that part of the spacer requiring activation for deployment of the spacer from at least one undeployed configuration to at least one deployed configuration and vice versa.
514 Citations
21 Claims
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1. An instrument for inserting and deploying an interspinous spacer having a body with at least one prong receiving portion and a wing rotatably connected to the body portion, wherein the wing is configured to cradle an adjacent spinous process, the instrument comprising:
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a handle, a first assembly connected to the handle, the first assembly comprising an outer shaft, an inner shaft located inside the outer shaft, at least one prong at a distal portion of one of the outer or inner shafts, and a control configured to move one of the outer or inner shafts with respect to the other and thereby deflect the prong into engagement with the prong receiving portion of the body of the interspinous spacer, wherein the body of the interspinous spacer is prevented from rotating with respect to the prong when the prong engages the prong receiving portion; and a driver having a distal portion configured to arrange the interspinous spacer, and wherein the driver is axially displaceable relative to the first assembly independent of (a) rotation of the driver about an axis of rotation defined by the first assembly such that the driver moves relative to the prong to deploy the interspinous spacer and (b) operation of the control. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. An instrument for inserting and deploying an interspinous spacer having a body with at least one prong receiving portion, the instrument comprising:
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a handle; a first assembly coupleable to the handle, the first assembly comprising an outer shaft, an inner shaft, at least one prong, and a control configured to move the outer shaft relative to the inner shaft to move the prong inwardly towards a longitudinal axis of the instrument such that the prong is received by the prong receiving portion of the body; and a driver configured to deploy the interspinous spacer, wherein the driver is configured to rotate relative to the prong independent of operation of the control, and wherein the driver is axially movable along the first assembly independent of rotation of the driver relative to the first assembly. - View Dependent Claims (18, 19, 20)
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21. An instrument for inserting and deploying an interspinous spacer having a body with at least one prong receiving portion, the instrument comprising:
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a handle; a first assembly coupleable to the handle, the first assembly comprising an outer shaft, an inner shaft, at least one prong, and a control configured to move the outer shaft relative to the inner shaft to move the prong inwardly towards a longitudinal axis of the instrument such that the prong is received by the prong receiving portion of the; and a driver configured to deploy the interspinous spacer, wherein the driver is positioned in the inner shaft and has a hexagonal shaped member positioned to engage a complementary hexagonal shaped recess of the interspinous spacer.
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Specification