Claims
- 1. A medical device comprising:a drill assembly comprising in combination: a MRI compatible cranial drill; and a drill bit; and a sterile barrier having an interior portion, a proximal end, a distal end, a proximal opening at the proximal end and an opening at the distal end, the opening at the distal end further comprising a sealed aperture, the drill being insertable into the proximal opening, the sealed aperture constructed and arranged to seal around the drill bit such that the drill assembly is enclosed in the interior portion of the sterile barrier and only a portion of the drill bit extends beyond the barrier into a sterile field.
- 2. The medical device of claim 1 wherein the sterile barrier comprises a bag made of plastic.
- 3. The medical device of claim 1 wherein the drill bit is sterile and the drill is nonsterile.
- 4. The medical device of claim 1 wherein the MRI compatible cranial drill is an air or compressed gas powered bone drill.
- 5. The medical device of claim 4 wherein the drill is disposable.
- 6. The medical device of claim 4 wherein the drill is re-sterilizable and reusable.
- 7. The medical device of claim 1 or claim 4, further comprising a skull mounted locking trajectory guide.
- 8. The medical device of claim 1 or claim 4 further comprising a MRI compatible adjustable depth stop whereby the depth of penetration of the drill is controlled.
- 9. The medical device of claim 8 wherein the depth stop includes at least two depth positions.
- 10. The medical device of claim 8 wherein the depth stop does not rotate with the drill bit.
- 11. The medical device of claim 8 wherein the adjustable depth stop is constructed and arranged to provide a first predetermined depth.
- 12. The medical device of claim 1 wherein the adjustable depth stop is constructed and arranged to provide at least one additional predetermined depth.
- 13. The medical device of claim 8 wherein the adjustable depth stop includes an adjustable screw.
- 14. The medical device of claim 8 wherein the adjustable depth stop includes a spring mounted clip having teeth shaped to mate with a plurality of serrations located on the drill bit, each serration corresponding to a predetermined depth and indicating relative depth stop position.
- 15. The medical device of claim 8 wherein the adjustable depth stop includes a button ratchet.
- 16. The medical device of claim 8 wherein the adjustable depth stop includes a collet lock.
- 17. The medical device of claim 1 wherein the drill bit is sterilizable and reusable.
- 18. The medical device of claim 1 wherein the drill bit is disposable.
- 19. The medical device of claim 1 at least a portion of which is made nonmagnetic plastic.
- 20. A sterile barrier having an interior portion, a proximal end, a distal end, a proximal opening at the proximal end and an opening at the distal end, the opening at the distal end further comprising a sealed aperture, the sterile barrier constructed and arranged to enclose a medical device that includes a drill, such that the drill is enclosed in the interior portion of the sterile barrier and only a portion of a drill bit extends exteriorly of the barrier, and wherein the aperture includes a member that is sized and shaped to engage the medical device.
- 21. A method for providing access to a site within a body of a surgical patient, the method comprising:providing a medical device comprising in combination: a MRI compatible drill; a sterile drill bit; and a sterile barrier having an interior portion, a proximal end, a distal end, a proximal opening at the proximal end and an opening at the distal end, the opening at the distal end further comprising a sealed aperture, the drill being insertable into the proximal opening, the sealed aperture constructed and arranged to seal around the drill bit such that the drill is enclosed in the interior portion of the sterile barrier and only a portion of the drill bit extends exteriorly of the barrier; providing a locking trajectory guide; mounting the trajectory guide on the patient's body; selecting a predetermined depth and adjusting a depth stop to the predetermined depth; advancing the medical device to the body and aligning it with the trajectory guide; utilizing the medical device to cause the sterile drill bit to penetrate the body the predetermined depth to which the depth stop is adjusted; and removing the sterile drill bit from the body.
- 22. The method of claim 21 wherein the medical device further comprises an adjustable depth stop whereby the depth of penetration of the drill bit is controlled.
- 23. A method for providing access to a brain of a surgical patient, the method comprising:providing a medical device comprising in combination: a MRI compatible cranial drill having a removable sterile drill bit and an adjustable depth stop whereby the depth of penetration of the drill bit is controlled; and a sterile barrier having an interior portion, a proximal end, a distal end, a proximal opening at the proximal end and an opening at the distal end, the opening at the distal end further comprising a sealed aperture, the drill being insertable into the proximal opening, the sealed aperture constructed and arranged to seal around the drill bit such that the drill is enclosed in the interior portion of the sterile barrier and only a portion of the drill bit extends exteriorly of the barrier; providing a skull mounted locking trajectory guide; mounting the trajectory guide on the patient's skull; selecting a predetermined depth and adjusting the depth stop to the predetermined depth; advancing the medical device to the skull and aligning it with the trajectory guide; utilizing the medical device to cause the sterile drill bit to penetrate the skull the predetermined depth to which the depth stop is adjusted; and removing the sterile drill bit from the skull.
- 24. The barrier of claim 20, wherein the aperture further includes an O-ring that is sized and shaped to seal around the drill bit.
- 25. A sterile barrier having an interior portion, a proximal end, a distal end, a proximal opening at the proximal end and an opening at the distal end, the opening at the distal end further comprising a sealed aperture, the sterile barrier constructed and arranged to enclose a medical device that includes a drill, such that the drill is enclosed in the interior portion of the sterile barrier and only a portion of a drill bit extends exteriorly of the barrier, and wherein the aperture includes an O-ring that is sized and shaped to seal around the drill bit.
CROSS-REFERENCE TO RELATED APPLICATIONS
This Application claims the benefit under 35 U.S.C. 119(e) of U.S. Provisional Application No. 60/162,492 filed Oct. 29, 1999, incorporated herein by reference.
US Referenced Citations (11)
Provisional Applications (1)
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Number |
Date |
Country |
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60/162492 |
Oct 1999 |
US |