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US 9,750,508 B1Granted
Insulated pedicle access system and related methods
AssigneeNuVasive, Inc.
InventorsJeff Barnes, Eric Finley, Thomas Scholl
Life of this patent
Estimating the term…
Abstract
The present invention relates to devices and methods directed towards accessing and forming holes in bone tissue including penetrating vertebral bones during surgical treatments of the spine, for example, to cannulate pedicles and form pilot holes for placing pedicle screws.
Claims23
A needle assembly system for use in a medical procedure, comprising:
- a cannula assembly including concentric inner and outer cannulas wherein the inner cannula has a distal end and a first length and the outer cannula has a distal end and a second length shorter than the first length, an insulated sheath situated between the inner cannula and the outer cannula, and a spring situated proximal to the insulated sheath and between the inner cannula and outer cannula, said insulated sheath spring biased to a first position in which a distal end of the insulated sheath is proximate the distal end of the inner cannula and movable between a position in which a distal end of the insulated sheath is proximate the distal end of the inner cannula and closer to the distal end of the inner cannula than to the distal end of the outer cannula, and a position in which a distal end of the insulated sheath is proximate the distal end of the outer cannula and closer to the distal end of the outer cannula than to the distal end of the inner cannula;
- and
- a stylet disposed through the inner cannula and having a shaped tip that protrudes from the distal end of the inner cannula.
A needle assembly system for use in a medical procedure, comprising:
- a cannula assembly including concentric inner and outer cannulas wherein the inner cannula has a distal end and a first length and the outer cannula has a distal end and a second length shorter than the first length, and an insulated sheath situated between the inner cannula and the outer cannula and movable between a position in which a distal end of the insulated sheath is proximate the distal end of the inner cannula and closer to the distal end of the inner cannula than to the distal end of the outer cannula, and a position in which a distal end of the insulated sheath is proximate the distal end of the outer cannula and closer to the distal end of the outer cannula than to the distal end of the inner cannula, wherein the insulated sheath is spring biased towards the position proximate the distal end of the inner cannula by a spring positioned between the inner and outer cannulae,
- a stylet disposed through the inner cannula and having a shaped tip that protrudes from the distal end of the inner cannula, and
- a connector situated outside the outer cannula and concentric with the outer cannula and attached to the insulated sheath through at least one elongated slot wherein the connector is moveable axially along the outer surface of the outer cannula.
A needle assembly system for use in a medical procedure, comprising:
- a cannula assembly including concentric inner and outer cannulas wherein the inner cannula has a distal end and a first length and the outer cannula has a distal end and a second length shorter than the first length, and an insulated sheath situated between the inner cannula and the outer cannula and movable between a position in which a distal end of the insulated sheath is proximate the distal end of the inner cannula and closer to the distal end of the inner cannula than to the distal end of the outer cannula, and a position in which a distal end of the insulated sheath is proximate the distal end of the outer cannula and closer to the distal end of the outer cannula than to the distal end of the inner cannula, wherein the insulated sheath is spring biased towards the position proximate the distal end of the inner cannula by a spring positioned between the inner and outer cannulae;
- a stylet disposed through the inner cannula and having a shaped tip that protrudes from the distal end of the inner cannula;
- and
- a handle comprising an upper portion and a lower portion, which is separable from the upper portion, wherein the upper portion is connected to the stylet and the lower portion is connected to the cannula assembly, said upper and lower portion lockable to one another to lock the cannula assembly and stylet together, said handle further including a contact that is configured to receive electrical stimulation signals from a stimulator.
1 more element
Dependencies are inferred from the claim text.