Single-handed surgical drill depth guide

• US 5,409,493 A
• Filed: 07/24/1992
• Issued: 04/25/1995
• Est. Priority Date: 07/13/1990
• Status: Expired due to Term

• Current Assignee: Greenburg Surgical Technologies, LLC
• Original Assignee: Greenburg Surgical Technologies, LLC
• Inventors: Greenberg, Alex M.
• Primary Examiner(s): RIMELL, SAMUEL G
• Application Number:
  US07/919,783
• Time in Patent Office: 1,005 Days
• Field of Search: 606/79, 606/80, 606/86, 606/96, 606/97, 606/98, 606/102, 606/104, 606/119, 606/55, 606/87, 606/108, 606/162
• US Class Current: 606/96
• CPC Class Codes: A61B 17/02 for holding wounds open; Tractors specula A61B1/32 ; drainage appliances for wounds A61M27/00
• CPC Class Codes: A61B 17/1633 Sleeves, i.e. non-rotating parts surrounding the bit shaft, e.g. the sleeve forming a single unit with the bit shaft A61B17/1644 takes precedence
• CPC Class Codes: A61B 17/1728 for holes for bone plates or plate screws
• CPC Class Codes: A61B 17/1739 specially adapted for particular parts of the body
• CPC Class Codes: A61B 17/176 for the jaw guiding dental drills A61C1/082
• CPC Class Codes: A61B 17/8071 for the jaw
• CPC Class Codes: A61B 2090/033 Abutting means, stops, e.g. abutting on tissue or skin
• CPC Class Codes: A61C 1/084 of implanting tools
• CPC Class Codes: B23B 2260/098 Magazines
• CPC Class Codes: B23B 47/28 Drill jigs for workpieces equipment for setting or guiding the drill B23B49/00

Abstract

A surgical drill guide for treating fractures in the craniomaxillofacial region is disclosed. The drill guide includes a telescopic sleeve having an inner telescoping segment slidably mounted within an outer telescoping segment. The telescopic sleeve also has a through-going bore which connects a first opening at an end of the outer telescoping segment with a second opening at an end of the inner telescoping segment. The bore is dimensioned for slidably receiving a drill bit or other instrument therein. The telescopic sleeve is mounted on a handle which includes a trigger. The trigger is provided for slidably retracting the inner segment into the outer segment to expose a preselected length of a drill bit or other instrument inserted through the bore of the sleeve.

Claims

1. A surgical drill guide for restricting the penetration depth into a hole of a first end of an instrument having two ends, a second end having a larger girth than said first end, said drill guide comprising:

an adjustable length sleeve comprising,

an outer telescopic segment having a first longitudinal bore, and

an inner telescopic segment having a second longitudinal bore, and being retractably disposed within and protruding from only a first end of said first bore of said outer telescopic segment so that said first and second bores are linearly aligned to form a single longitudinal bore of said adjustable length sleeve,

said inner and outer telescopic segments cooperating so that said inner telescopic sleeve is displaceable into and, out of only said first end of said first bore of said outer telescopic segment, and so that a displacement of said inner telescopic segment out of and into said first bore of said outer sleeve segment changes a longitudinal length of said adjustable length sleeve,

wherein said single longitudinal bore of said adjustable length sleeve is dimensioned for slidably receiving an instrument therethrough, until a larger girth second end of the instrument abuts a first end of said adjustable length sleeve and a first end of the instrument protrudes from a second end of said adjustable length sleeve opposite said first end of said adjustable length sleeve,

wherein said second end of said adjustable length sleeve is blunt,

wherein said adjustable length sleeve is dimensioned such that said second end of said adjustable length sleeve from which the first end of the instrument protrudes is larger than a hole into which the instrument penetrates, and

a handle mounted to said adjustable length sleeve, said handle including trigger means for causing said inner telescopic segment to slidably retract into said outer telescopic segment to shorten said adjustable length sleeve so as to expose a preselected length of instrument inserted through said adjustable length sleeve,

wherein said penetration depth of said instrument into said hole is restricted to said preselected length.

2. The drill guide of claim 1, wherein said trigger means is hingedly mounted on said handle for scissoring movement in cooperation with said handle and said adjustable length sleeve.

3. The drill guide of claim 2 wherein said handle is connected to said inner segment, and

wherein said trigger means comprises a lever with first and second lever arms, said first lever arm interacting with said outer segment so that when said second lever arm is urged towards said handle, said first lever arm forces said outer segment to slide towards said inner segment thereby retracting said inner segment into said outer segment.

4. The drill guide of claim 1 wherein said adjustable length sleeve further comprises biasing means for biasing said inner telescopic segment into an extended position from said outer telescopic segment.

5. The drill guide of claim 4, wherein said biasing means is a compression spring disposed within said outer telescopic segment, between said inner segment and end of said outer segment.

6. The drill guide of claim 1 wherein said handle is attached to said outer segment and said trigger means is attached to said inner segment.

7. The drill guide of claim 1 wherein said trigger means is attached to said adjustable length sleeve for sliding movement in cooperation with said handle and said adjustable length sleeve.

8. The drill guide of claim 7 wherein said trigger means comprises substantially L-shaped member having a long leg, connected to said adjustable length sleeve, and a short leg, extending towards said handle.

9. The drill guide of claim 7 wherein said trigger means comprises a long member and an eyelet connected to said long member, said long member being attached to said adjustable length sleeve with said eyelet extending towards said handle.

10. The drill guide of claim 1, further comprising a depth gauge on an outer surface of said adjustable length sleeve.

11. The drill guide of claim 1 wherein said trigger means further comprises retaining means for retaining said inner segment at an adjusted extension from said outer segment.

12. The drill guide of claim 11 wherein said retaining means is a set screw.

13. The drill guide of claim 1 wherein said trigger means is disposed in the vicinity of said handle for single handed gripping and retracting of said inner segment into said outer segment.

14. The drill guide of claim 1, wherein said adjustable length sleeve further comprises a chamfered tip at said inner telescopic end.

15. The drill guide of claim 1, wherein said outer segment is dimensioned to receive said instrument but is smaller than said second end of said instrument.

16. The drill guide of claim 1, wherein said outer segment further comprises a stop which limits the insertion of said instrument into said single longitudinal bore to a particular length.

17. The drill guide of claim 1 further comprising retractor means for retracting at least one side of an incision.

18. The drill guide of claim 17 wherein said retractor means further comprises major and minor retractors extending in substantially opposite directions.

19. The drill guide of claim 17 wherein said retractor means further comprises means for demountably attaching said retractor means to said drill guide.

20. The drill guide of claim 17 wherein said retractor means further comprises means for extending said retractor means in a direction parallel to said inner segment.

21. The drill guide of claim 1 wherein said trigger means further comprises retractor means extending from said trigger means for retracting at least one side of an incision.

22. The surgical guide of claim 1, wherein said instrument is a drill bit.

23. A surgical drill guide for restricting penetration depth into a hole of a first end of an instrument having two ends, a second end having a larger girth than said first end, said guide comprising,

an adjustable length sleeve comprising,

an outer telescopic segment having a first longitudinal bore, a first end and a second end,

an inner telescopic segment having a second longitudinal bore, and being retractably disposed within and protruding from only a first end of said first bore of said outer telescopic segment so that said first and second bores are linearly aligned to form a single longitudinal bore of said adjustable length sleeve,

said inner and outer telescopic segments cooperating so that said inner telescopic sleeve is displaceable into and out of only said first end of said first bore of said outer telescopic segment, and so that a displacement of said inner telescopic segment out of and into said first bore of said outer sleeve segment changes a longitudinal length of said adjustable length sleeve,

wherein said single longitudinal bore of said adjustable length sleeve is dimensioned for slidably receiving an instrument therethrough, until a larger girth second end of the instrument abuts a first end of said adjustable length sleeve and a first end of the instrument protrudes from a second end of said adjustable length sleeve opposite said first end of said adjustable length sleeve,

wherein said second end of said adjustable length sleeve is blunt,

stop means, located at said first end of said adjustable length sleeve for limiting a length of the instrument received in said single longitudinal bore to a particular length, and

a handle on which said adjustable length sleeve is mounted, said handle comprising trigger means for slidably retracting said inner telescopic segment into said outer telescopic segment so as to expose a preselected length of instrument inserted through said adjustable length sleeve.

24. The surgical guide of claim 23, wherein said instrument is a drill bit.

25. A surgical drill guide comprising

a telescopic sleeve comprising an inner telescopic segment having a first longitudinal bore and an outer telescopic segment having a second longitudinal bore, said inner telescopic segment being slidably mounted in said outer telescopic segment,

a first opening at an end of said outer telescopic segment,

a second opening at an end of said inner telescopic segment,

said first and second bores being longitudinally aligned to form a single longitudinal bore, passing through said inner and outer telescopic segments and connecting said first and second openings together, said single longitudinal bore being dimensioned for slidably receiving an instrument therethrough,

a handle on which said telescopic sleeve is mounted, said handle including trigger means for causing said inner telescopic segment to slidably retract into said outer telescopic segment so as to expose, at said second opening, a preselected length of instrument inserted through said single longitudinal bore of said telescopic sleeve, and

a retractor means attached to said telescopic sleeve for retracting at least one side of an incision, said retractor means further comprising means for demountably attaching said retractor means to said drill guide.