MRI COMPATIBLE SURGICAL DRILLS AND RELATED METHODS

• US 20130325012A1
• Filed: 03/07/2013
• Published: 12/05/2013
• Est. Priority Date: 05/31/2012
• Status: Active Grant

• Current Assignee: Clearpoint Neuro, Inc.
• Original Assignee: MRI Interventions, Inc. (Clearpoint Neuro, Inc.)
• Inventors: Piferi, Peter, Ghidoli, Daniele
• Granted Patent: US 9,192,393 B2
• Time in Patent Office: Days
• US Class Current: 606/80
• CPC Class Codes: A61B 17/16 Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans arthroscopic bone cutters A61B17/320016; dental implant drills potentially for other surgical use A61C8/0089; bone grinders A61F2/4644, A22C17/06; A61B17/1662 takes precedence over all other subgroups except A61B17/17
• CPC Class Codes: A61B 17/1624 Drive mechanisms therefor
• CPC Class Codes: B23B 45/06 driven by man-power

Abstract

A surgical, manually operated, hand-held MRI-compatible drill for drilling though target bone of a patient includes: a housing; a ring gear held in the housing; a hand crank attached to ring gear and the housing; a pinion gear held in the housing in cooperating alignment with the ring gear; an elongate shaft attached to the pinion on one end portion and to a chuck support on an opposing end portion; a chuck attached to the chuck support held; and jaws attached to the chuck support and residing in the chuck adapted to hold a drill bit. The drill is light-weight. The components can all be polymeric.

Claims

1. An MRI compatible hand-held, manually operable surgical drill, comprising:

a housing;

a ring gear held in the housing;

a hand crank attached to ring gear and the housing;

a pinion gear held in the housing in cooperating alignment with the ring gear;

a chuck extending from the housing; and

jaws attached to a chuck support and residing in the chuck adapted to hold a drill bit so that the drill bit extends out from the chuck,

wherein the drill is sterile for surgical use and light-weight.

2. The drill of claim 1, wherein the housing, ring gear, pinion gear and hand crank are polymeric.

3. The drill of claim 2, wherein the hand crank and ring gear are a unitary monolithic molded body.

4. The drill of claim 1, wherein all components of the drill are polymeric.

5. The drill of claim 2, herein the housing has a circular portion that merges into an elongate portion, wherein the ring and pinion gears are held in the circular portion of the housing and the hand crank is attached to one side of the circular portion of the housing.

6. The drill of claim 1, wherein the jaws are polymeric jaws configured to releasably hold a respective drill bit having sizes between about 2.0 mm to about 3.2 mm.

7. The drill of claim 1, wherein the ring and pinion gears have a gear ratio of 3:

1.

8. The drill of claim 1, wherein the drill is compact and has a length that is less than 7 inches and a maximum width dimension that is less than four inches.

9. The drill of claim 1, wherein the hand crank has a lever with a knob that together has a length that extends beyond the housing about 1-3 inches, and wherein the lever with knob has an outer travel diameter of between about 5-7 inches.

10. The drill of claim 2, wherein the circular portion of the housing has a diameter of about 3 inches.

11. The drill of claim 1, wherein the ring and pinion gears are acetal gears.

12. The drill of claim 1, wherein the chuck, jaws and chuck support are Polyetheretherketone (PEEK) PEEK components.

13. The drill of claim 1, further comprising an elongate polymeric shaft that is held in an elongate portion of the polymeric housing that is attached to the pinion on one end potion and the chuck support on an opposing end portion, and wherein the chuck resides outside but proximate an end of the elongate portion of the housing.

14. A surgical kit for an MRI-guided interventional surgery on a patient, the kit comprising:

a sterile manually operated, light weight, hand-held surgical drill, comprising;

a polymeric housing;

a polymeric ring gear held in the housing;

a polymeric hand crank attached to ring gear and the housing;

a polymeric pinion gear held in the housing in cooperating alignment with the ring gear;

a polymeric chuck extending out of the housing; and

jaws residing in the chuck adapted to hold a drill bit; and

sterile packaging containing the drill.

15. The kit of claim 14, further comprising a plurality of drill bits configured to be releasably held by the jaws of the drill.

16. The kit of claim 14, wherein the ring gear and hand crank are provided a unitary monolithic molded body.

17. The kit of claim 14, wherein the drill further comprises an elongate polymeric shaft attached to the pinion on one end portion and to a chuck support on an opposing end portion, and wherein the chuck is attached to the chuck support.

18. A method of forming an aperture in bone of a patient during an MRI guided surgical procedure, comprising:

placing a patient on a gantry in an MR Scanner room;

holding a hand-held drill with a hand crank against a target location of a patient while the patient is on the gantry;

manually rotating the hand crank; and

forming an aperture in target bone of the patient in response to the rotating step.

19. The method of claim 18, wherein the drill comprises polymeric ring and pinion gears held inside a polymeric housing.

20. The method of claim 18, further comprising directing a drill bit held by the drill through an elongate targeting cannula, then into the patient during the rotating and forming steps.