WO2019197957A1 - K-wire depth measurement - Google Patents

K-wire depth measurement Download PDF

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Publication number
WO2019197957A1
WO2019197957A1 PCT/IB2019/052849 IB2019052849W WO2019197957A1 WO 2019197957 A1 WO2019197957 A1 WO 2019197957A1 IB 2019052849 W IB2019052849 W IB 2019052849W WO 2019197957 A1 WO2019197957 A1 WO 2019197957A1
Authority
WO
WIPO (PCT)
Prior art keywords
wire
handle
interface member
tool
surgical
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/IB2019/052849
Other languages
French (fr)
Inventor
Rafi HAZIZA
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Premia Spine Ltd
Original Assignee
Premia Spine Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Premia Spine Ltd filed Critical Premia Spine Ltd
Priority to EP19723860.3A priority Critical patent/EP3773285A1/en
Priority to US17/046,783 priority patent/US12089885B2/en
Publication of WO2019197957A1 publication Critical patent/WO2019197957A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws or setting implements
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/84—Fasteners therefor or fasteners being internal fixation devices
    • A61B17/846—Nails or pins, i.e. anchors without movable parts, holding by friction only, with or without structured surface
    • A61B17/848—Kirschner wires, i.e. thin, long nails
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/34—Trocars; Puncturing needles
    • A61B17/3472—Trocars; Puncturing needles for bones, e.g. intraosseus injections
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws or setting implements
    • A61B17/88—Osteosynthesis instruments; Methods or means for implanting or extracting internal or external fixation devices
    • A61B17/8897—Guide wires or guide pins
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
    • A61B90/06—Measuring instruments not otherwise provided for
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/16—Instruments for performing osteoclasis; Drills or chisels for bones; Trepans
    • A61B17/1697—Instruments for performing osteoclasis; Drills or chisels for bones; Trepans specially adapted for wire insertion
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws or setting implements
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/70—Spinal positioners or stabilisers, e.g. stabilisers comprising fluid filler in an implant
    • A61B17/7074—Tools specially adapted for spinal fixation operations other than for bone removal or filler handling
    • A61B17/7092—Tools specially adapted for spinal fixation operations other than for bone removal or filler handling for checking pedicle hole has correct depth or has an intact wall
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
    • A61B90/06—Measuring instruments not otherwise provided for
    • A61B2090/062—Measuring instruments not otherwise provided for penetration depth
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2251/00—Details of tools for drilling machines
    • B23B2251/52—Depth indicators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2260/00—Details of constructional elements
    • B23B2260/048—Devices to regulate the depth of cut
    • B23B2260/0485—Depth gauges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2250/00—General details of portable percussive tools; Components used in portable percussive tools
    • B25D2250/055—Depth properties, e.g. tools having depth indicator or depth control
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/89—Tool or Tool with support
    • Y10T408/892—Tool or Tool with support with work-engaging structure detachable from cutting edge
    • Y10T408/8925—Depth-limiting member
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/909—Cutter assemblage or cutter element therefor [e.g., chain saw chain]
    • Y10T83/917—Having diverse cutting elements
    • Y10T83/921—And noncutting depth gauge
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/909—Cutter assemblage or cutter element therefor [e.g., chain saw chain]
    • Y10T83/925—Having noncutting depth gauge

Definitions

  • the present invention relates generally to methods and apparatus for measuring depth of a Kirschner wire (K-wire) that passes through a surgical tool, such as but not limited to, screwdrivers, taps, bores, awls, probes, jamshidi needles, and others.
  • K-wire Kirschner wire
  • a K-wire or similar guide wire (the terms being used interchangeably throughout) is used in combination with a cannulated surgical tool, such as a screwdriver, tap, bore, awl, probe, or jamshidi needle, to name some.
  • the K-wire is positioned through the pedicle and into the vertebral body to indicate or establish the position of subsequent screw placement.
  • the screw connected to the screwdriver is guided over the K-wire through the lumen (cannula) of the surgical tool and penetrates into the bone, which if not done properly can injure the patient, particularly if the K-wire encounters certain sensitive tissues.
  • the procedures often require the use of force which can cause an otherwise properly positioned K-wire to move forward into the surgical site, which if excessive can move into contact where contact is to be avoided.
  • Measurement of the depth of the K-wire is critical for patient safety.
  • the K-wire is placed to the desired depth, and then the screw is advanced over the K-wire.
  • the surgeon must make sure the tip of the K-wire is not pushed further distally towards the anterior cortex of the vertebral body. If the K-wire tip were to puncture through the vertebra it could damage major blood vessels and cause major bleeding.
  • the present invention seeks to provide an improved device for measuring the depth of a K-wire, as described more in detail hereinbelow.
  • K-wire throughout the specification and claims encompasses any slender, elongated piece with a tip used for entering bone, such as a K-wire or Steinmann pin or guidewire.
  • an assembly including a surgical device including a distal interface member and a proximal handle, the distal interface member including a connecting element for connecting to a surgical tool, and a K-wire that passes through a central passageway of the surgical device distally through the distal interface member into a lumen of the surgical tool, and a wire depth measurement tool that includes a handle interface member that assembles to the handle and one or more graduated scales that extend proximally from the handle interface member, the one or more graduated scales including depth graduations for indicating an amount a tip of the K-wire protrudes from a distal end of the surgical tool.
  • the handle interface member includes a threaded connection and a knob, wherein the threaded connection mates with the handle and is tightened or loosened by turning the knob.
  • the K-wire is locked in place in the handle by means of a locking element.
  • the one or more graduated scales include a plurality of scales that face different directions.
  • the wire depth measurement tool is formed with a lumen for the K-wire to pass through.
  • Fig. 1 is a simplified illustration of a surgical tool assembled with a wire depth measurement tool, constructed and operative in accordance with an embodiment of the present invention
  • Fig, 2 is a simplified illustration of the wire depth measurement tool assembled on a handle of the surgical tool
  • Figs. 3 and 4 are simplified plan-view and perspective illustrations, respectively, of the wire depth measurement tool, in accordance with a non-limiting embodiment of the present invention.
  • Fig. 5 is a simplified exploded illustration of the surgical tool, wire depth measurement tool and K-wire.
  • FIG. 1-2 and 5 illustrate a surgical device 10 assembled with a wire depth measurement tool 30, constructed and operative in accordance with a non-limiting embodiment of the present invention.
  • Surgical device 10 may be, but not necessarily, constructed similarly to the tool described in PCT Patent Application PCT/IB2016/052074 (WO 2016/166662).
  • Surgical device 10 includes a distal interface member 12 and a proximal handle 14.
  • Distal interface member 12 includes a connecting element 16 for connecting to a surgical tool 18, such as but not limited to, a cannulated pedicle awl, a screw, a screwdriver, a tap, a bore, a probe, or a jamshidi needle and the like.
  • connecting element 16 may be a quick-disconnect connector that secures to the proximal end of tool 18.
  • Surgical device 10 is formed with a central passageway or lumen formed through distal interface member 12 and handle 14, and through surgical tool 18. Two or more surgical tools may be connected to each other, such as a screwdriver connected to a pedicle screw.
  • a K-wire 20 passes through the central passageway of surgical device 10 distally through distal interface member 12 into the lumen of surgical tool 18, and then can pass distally out the distal tip of surgical tool 18.
  • the K-wire 20 may be locked in place in the handle 14 by means of a locking element 22 (such as, but not limited to, a screw or nut).
  • the wire depth measurement tool 30, shown particularly in Figs. 3 and 4 includes a handle interface member 32 that assembles to the handle 14.
  • handle interface member 32 may include a threaded connection 33 and a knob 34.
  • the male (or female) threaded connection 33 mates with a corresponding (female or male) threaded portion of handle 14 and is tightened or loosened by turning knob 34 in the appropriate direction.
  • handle interface member 32 may connect to handle 14 or even to surgical tool 18 by other means, such as but not limited to, quick disconnect connections, press fit, snap fit, bayonet connections and others.
  • One or more graduated scales 36 extend proximally from handle interface member 32.
  • Each graduated scale 36 has depth graduations for indicating the depth of K-wire 20, that is, the amount the tip of K-wire 20 protrudes from the distal end of the surgical tool 18.
  • the wire depth measurement tool 30 is formed with a lumen 38 for the K-wire 20 to pass through. The wire depth measurement tool 30 is pre-calibrated such that when tool 30 is properly assembled on surgical device 10, the graduated scale 36 accurately indicates the depth of K-wire 20.
  • K-wire 20 includes one or more depth graduations 23, which may be laser marked, etched or otherwise disposed at least partially around the circumference of K-wire 20.

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  • Health & Medical Sciences (AREA)
  • Surgery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Veterinary Medicine (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Pathology (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Neurology (AREA)
  • Surgical Instruments (AREA)

Abstract

An assembly includes a surgical device (10) including a distal interface member (12) and a proximal handle (14), the distal interface member (12) including a connecting element (16) for connecting to a surgical tool (18), and a K-wire (20) that passes through a central passageway of the surgical device (10) distally through the distal interface member (12) into a lumen of the surgical tool (18). A wire depth measurement tool (30) includes a handle interface member (32) that assembles to the handle (14) and one or more graduated scales (36) that extend proximally from the handle interface member (32). The graduated scales (36) include depth graduations for indicating an amount a tip of the K-wire (20) protrudes from a distal end of the surgical tool (18).

Description

K-WIRE DEPTH MEASUREMENT
FIELD OF THE INVENTION
The present invention relates generally to methods and apparatus for measuring depth of a Kirschner wire (K-wire) that passes through a surgical tool, such as but not limited to, screwdrivers, taps, bores, awls, probes, jamshidi needles, and others.
BACKGROUND OF THE INVENTION
For example, in certain surgical procedures, a K-wire or similar guide wire (the terms being used interchangeably throughout) is used in combination with a cannulated surgical tool, such as a screwdriver, tap, bore, awl, probe, or jamshidi needle, to name some. The K-wire is positioned through the pedicle and into the vertebral body to indicate or establish the position of subsequent screw placement. Once the proper positioning of the K-wire is confirmed by X-rays, the screw connected to the screwdriver is guided over the K-wire through the lumen (cannula) of the surgical tool and penetrates into the bone, which if not done properly can injure the patient, particularly if the K-wire encounters certain sensitive tissues. The procedures often require the use of force which can cause an otherwise properly positioned K-wire to move forward into the surgical site, which if excessive can move into contact where contact is to be avoided.
Measurement of the depth of the K-wire, that is, the amount the tip of the K-wire protrudes from the distal end of the surgical tool, is critical for patient safety. In a normal screw placement over a K-wire, the K-wire is placed to the desired depth, and then the screw is advanced over the K-wire. The surgeon must make sure the tip of the K-wire is not pushed further distally towards the anterior cortex of the vertebral body. If the K-wire tip were to puncture through the vertebra it could damage major blood vessels and cause major bleeding.
SUMMARY OF THE INVENTION
The present invention seeks to provide an improved device for measuring the depth of a K-wire, as described more in detail hereinbelow.
The term K-wire throughout the specification and claims encompasses any slender, elongated piece with a tip used for entering bone, such as a K-wire or Steinmann pin or guidewire.
There is thus provided in accordance with an embodiment of the present invention an assembly including a surgical device including a distal interface member and a proximal handle, the distal interface member including a connecting element for connecting to a surgical tool, and a K-wire that passes through a central passageway of the surgical device distally through the distal interface member into a lumen of the surgical tool, and a wire depth measurement tool that includes a handle interface member that assembles to the handle and one or more graduated scales that extend proximally from the handle interface member, the one or more graduated scales including depth graduations for indicating an amount a tip of the K-wire protrudes from a distal end of the surgical tool.
In accordance with an embodiment of the present invention the handle interface member includes a threaded connection and a knob, wherein the threaded connection mates with the handle and is tightened or loosened by turning the knob.
In accordance with an embodiment of the present invention the K-wire is locked in place in the handle by means of a locking element.
In accordance with an embodiment of the present invention the one or more graduated scales include a plurality of scales that face different directions.
In accordance with an embodiment of the present invention the wire depth measurement tool is formed with a lumen for the K-wire to pass through.
BRIEF DESCRIPTION OF THE DRAWINGS
The present invention will be understood and appreciated more fully from the following detailed description taken in conjunction with the drawings in which:
Fig. 1 is a simplified illustration of a surgical tool assembled with a wire depth measurement tool, constructed and operative in accordance with an embodiment of the present invention;
Fig, 2 is a simplified illustration of the wire depth measurement tool assembled on a handle of the surgical tool;
Figs. 3 and 4 are simplified plan-view and perspective illustrations, respectively, of the wire depth measurement tool, in accordance with a non-limiting embodiment of the present invention; and
Fig. 5 is a simplified exploded illustration of the surgical tool, wire depth measurement tool and K-wire.
DETAIFED DESCRIPTION OF EMBODIMENTS
Reference is now made to Figs. 1-2 and 5, which illustrate a surgical device 10 assembled with a wire depth measurement tool 30, constructed and operative in accordance with a non-limiting embodiment of the present invention.
Surgical device 10 may be, but not necessarily, constructed similarly to the tool described in PCT Patent Application PCT/IB2016/052074 (WO 2016/166662). Surgical device 10 includes a distal interface member 12 and a proximal handle 14. Distal interface member 12 includes a connecting element 16 for connecting to a surgical tool 18, such as but not limited to, a cannulated pedicle awl, a screw, a screwdriver, a tap, a bore, a probe, or a jamshidi needle and the like. For example, connecting element 16 may be a quick-disconnect connector that secures to the proximal end of tool 18. Surgical device 10 is formed with a central passageway or lumen formed through distal interface member 12 and handle 14, and through surgical tool 18. Two or more surgical tools may be connected to each other, such as a screwdriver connected to a pedicle screw.
A K-wire 20 passes through the central passageway of surgical device 10 distally through distal interface member 12 into the lumen of surgical tool 18, and then can pass distally out the distal tip of surgical tool 18. The K-wire 20 may be locked in place in the handle 14 by means of a locking element 22 (such as, but not limited to, a screw or nut).
The wire depth measurement tool 30, shown particularly in Figs. 3 and 4, includes a handle interface member 32 that assembles to the handle 14. For example, handle interface member 32 may include a threaded connection 33 and a knob 34. The male (or female) threaded connection 33 mates with a corresponding (female or male) threaded portion of handle 14 and is tightened or loosened by turning knob 34 in the appropriate direction. Alternatively, handle interface member 32 may connect to handle 14 or even to surgical tool 18 by other means, such as but not limited to, quick disconnect connections, press fit, snap fit, bayonet connections and others.
One or more graduated scales 36 extend proximally from handle interface member 32. Each graduated scale 36 has depth graduations for indicating the depth of K-wire 20, that is, the amount the tip of K-wire 20 protrudes from the distal end of the surgical tool 18. There are preferably several graduate scales 36 that face different directions so the surgeon can easily see the depth graduations at any viewing angle. The wire depth measurement tool 30 is formed with a lumen 38 for the K-wire 20 to pass through. The wire depth measurement tool 30 is pre-calibrated such that when tool 30 is properly assembled on surgical device 10, the graduated scale 36 accurately indicates the depth of K-wire 20.
In another aspect of the invention, K-wire 20 includes one or more depth graduations 23, which may be laser marked, etched or otherwise disposed at least partially around the circumference of K-wire 20.

Claims

CLAIMS What is claimed is:
1. An assembly comprising:
a surgical device (10) comprising a distal interface member (12) and a proximal handle (14), said distal interface member (12) comprising a connecting element (16) for connecting to a surgical tool (18), and a K-wire (20) that passes through a central passageway of said surgical device (10) distally through said distal interface member (12) into a lumen of said surgical tool (18); and
a wire depth measurement tool (30) that comprises a handle interface member (32) that assembles to said handle (14) and one or more graduated scales (36) that extend proximally from said handle interface member (32), said one or more graduated scales (36) comprising depth graduations for indicating an amount a tip of said K-wire (20) protrudes from a distal end of said surgical tool (18).
2. The assembly according to claim 1, wherein said handle interface member (32) comprises a threaded connection (33) and a knob (34), wherein said threaded connection (33) mates with said handle (14) and is tightened or loosened by turning said knob (34).
3. The assembly according to claim 1, wherein said K-wire (20) is locked in place in said handle (14) by means of a locking element (22).
4. The assembly according to claim 1, wherein said one or more graduated scales (36) comprise a plurality of scales (36) that face different directions.
5. The assembly according to claim 1, wherein said wire depth measurement tool (30) is formed with a lumen (38) for said K-wire (20) to pass through.
6. The assembly according to claim 1, wherein said K-wire (20) comprises one or more depth graduations (23) disposed at least partially around a circumference of said K- wire (20).
PCT/IB2019/052849 2018-04-12 2019-04-07 K-wire depth measurement Ceased WO2019197957A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP19723860.3A EP3773285A1 (en) 2018-04-12 2019-04-07 K-wire depth measurement
US17/046,783 US12089885B2 (en) 2018-04-12 2019-04-07 K-wire depth measurement

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201862656492P 2018-04-12 2018-04-12
US62/656,492 2018-04-12

Publications (1)

Publication Number Publication Date
WO2019197957A1 true WO2019197957A1 (en) 2019-10-17

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PCT/IB2019/052849 Ceased WO2019197957A1 (en) 2018-04-12 2019-04-07 K-wire depth measurement

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US (1) US12089885B2 (en)
EP (1) EP3773285A1 (en)
WO (1) WO2019197957A1 (en)

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