US6716215B1 — Cranial drill with sterile barrier

Claim 1

Independent Claim 109 words

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.

Claim 2

Dependent Claim 109 words

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.

Claim 3

Dependent Claim 16 words

The medical device of claim 1 wherein the sterile barrier comprises a bag made of plastic.

Claim 4

Dependent Claim 17 words

The medical device of claim 1 wherein the drill bit is sterile and the drill is nonsterile.

Claim 5

Dependent Claim 21 words

The medical device of claim 1 wherein the MRI compatible cranial drill is an air or compressed gas powered bone drill.

Claim 6

Dependent Claim 11 words

The medical device of claim 4 wherein the drill is disposable.

Claim 7

Dependent Claim 13 words

The medical device of claim 4 wherein the drill is re-sterilizable and reusable.

Claim 8

Dependent Claim 18 words

The medical device of claim 1 or claim 4 , further comprising a skull mounted locking trajectory guide.

Claim 9

Dependent Claim 27 words

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.

Claim 10

Dependent Claim 16 words

The medical device of claim 8 wherein the depth stop includes at least two depth positions.

Claim 11

Dependent Claim 17 words

The medical device of claim 8 wherein the depth stop does not rotate with the drill bit.

Claim 12

Dependent Claim 21 words

The medical device of claim 8 wherein the adjustable depth stop is constructed and arranged to provide a first predetermined depth.

Claim 13

Dependent Claim 23 words

The medical device of claim 1 wherein the adjustable depth stop is constructed and arranged to provide at least one additional predetermined depth.

Claim 14

Dependent Claim 15 words

The medical device of claim 8 wherein the adjustable depth stop includes an adjustable screw.

Claim 15

Dependent Claim 44 words

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.

Claim 16

Dependent Claim 15 words

The medical device of claim 8 wherein the adjustable depth stop includes a button ratchet.

Claim 17

Dependent Claim 15 words

The medical device of claim 8 wherein the adjustable depth stop includes a collet lock.

Claim 18

Dependent Claim 14 words

The medical device of claim 1 wherein the drill bit is sterilizable and reusable.

Claim 19

Dependent Claim 12 words

The medical device of claim 1 wherein the drill bit is disposable.

Claim 20

Dependent Claim 16 words

The medical device of claim 1 at least a portion of which is made nonmagnetic plastic.

Claim 21

Dependent Claim 97 words

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.

Claim 22

Dependent Claim 97 words

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.

Claim 23

Independent Claim 192 words

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.

Claim 24

Independent Claim 192 words

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.

Claim 25

Dependent Claim 26 words

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.

Claim 26

Independent Claim 210 words

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.

Claim 27

Independent Claim 210 words

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.

Claim 28

Dependent Claim 24 words

The barrier of claim 20 , wherein the aperture further includes an O-ring that is sized and shaped to seal around the drill bit.

Claim 29

Dependent Claim 98 words

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.

Claim 30

Dependent Claim 98 words

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.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	2007-04-06	2007-10-06	2008-04-06	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	2011-04-06	2011-10-06	2012-04-06	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2015-04-06	2015-10-06	2016-04-06	$7700.00	Window Closed / Lapsed

Cranial drill with sterile barrier

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