WO2007100769A2 - Ensemble canule et fil-guide verrouillable - Google Patents

Ensemble canule et fil-guide verrouillable Download PDF

Info

Publication number
WO2007100769A2
WO2007100769A2 PCT/US2007/004941 US2007004941W WO2007100769A2 WO 2007100769 A2 WO2007100769 A2 WO 2007100769A2 US 2007004941 W US2007004941 W US 2007004941W WO 2007100769 A2 WO2007100769 A2 WO 2007100769A2
Authority
WO
WIPO (PCT)
Prior art keywords
bore
wire probe
lock
lock cap
lock body
Prior art date
Application number
PCT/US2007/004941
Other languages
English (en)
Other versions
WO2007100769A3 (fr
Inventor
Jack White
David Stephens
Wayne Black
Original Assignee
Cp Medical Corporation
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 Cp Medical Corporation filed Critical Cp Medical Corporation
Publication of WO2007100769A2 publication Critical patent/WO2007100769A2/fr
Publication of WO2007100769A3 publication Critical patent/WO2007100769A3/fr

Links

Classifications

    • 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
    • A61B90/39—Markers, e.g. radio-opaque or breast lesions markers
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B2017/00477—Coupling
    • 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
    • A61B90/39—Markers, e.g. radio-opaque or breast lesions markers
    • A61B2090/3904—Markers, e.g. radio-opaque or breast lesions markers specially adapted for marking specified tissue
    • A61B2090/3908—Soft tissue, e.g. breast tissue

Definitions

  • This invention relates to a device for precisely positioning a wire probe at a desired location prior to a surgical or diagnostic procedure, and in particular, to a cannula needle and probe wire assembly in which the probe wire can be inserted through the cannula into the body of a patient, and once in position, locked into place.
  • a probe wire is often used to precisely mark the location of non-palpable breast lesion.
  • a cannula is surgically inserted until its tip is in the general vicinity of the lesion.
  • the cannula is then inserted through the cannula to position the curved end of the wire as closely as possible to the lesion.
  • a mammogram is taken to view the location of the probe wire, which is then repositioned if necessary. Once the probe wire is positioned satisfactorily, it is locked into place in the cannula, and the cannula is taped into place in preparation for the surgical procedure to remove the lesion.
  • U.S. Patent No. 5,423,426 discloses a lesion marking device having a helically wound coil of wire attached to an end of the shaft, and which is insertable into the body through a cannula for anchoring the marking device into
  • a second helical wire may be provided on the shaft which cooperates with a wire guide device attached to the needle to enable the physician to determine the depth of the marking device as it anchors into the lesion.
  • U.S. Patent No. 5,011 ,473 to Gatturna discloses a wire probe unit having a cannula and a wire hub unit engageable with the cannula.
  • the wire hub unit includes a set of tapered clamping fingers surrounding the probe wire.
  • a threaded cap having a tapered socket is placed over the tapered clamping fingers and is threaded onto the wire hub. Once the probe wire is in position the clamping fingers are clamped around the probe wire by tightening the threaded cap onto the wire hub.
  • the assembly is complex and expensive to manufacture, and clamping of the probe wire requires more manipulation of the threaded cap than is preferable in a surgical setting.
  • the probe wire is secured in position by use of a set screw threaded into a portion of the cannula assembly.
  • the set screw can deform the probe wire if over- tightened, and adversely affect the utility of the probe wire if it must be repositioned.
  • the present invention is embodied in a preferred embodiment of a wire probe assembly that includes a cannula and locking assembly having an axial bore, and a wire probe disposed in the axial bore.
  • the locking assembly includes a lock body and a lock cap rotatably mounted on the lock body.
  • the cannula includes a mounting hub which engages a portion of the lock body to connect the cannula to the lock body.
  • a pair of spaced-apart flanges extends from the lock body. At least one of the flanges has a peripheral cam surface.
  • the lock cap has a first bore portion adjacent the peripheral cam surface of the flanges.
  • the first bore portion has a first bore radius that is less than a first radius of the peripheral cam surface and a second bore radius that is at least as long as the first radius of the peripheral cam surface.
  • the lock cap is operable to rotate on the lock body to align the lock cap first bore radius with the first flange radius to urge the spaced-apart flanges toward each other and exert a clamping force on the wire probe.
  • the lock cap is rotated about 90 degrees to clamp the wire probe into place, but the invention is not intended to be so limited.
  • the flange assembly includes an elliptical outer surface.
  • the lock body includes a corresponding elliptical bore portion having a minor diameter that is less than the major diameter of the
  • the lock body and the lock cap include respective surface markings that align with each other when the lock cap is rotated to the second position.
  • the resilient clamp member also includes a peripheral cam surface as described above. This preferred embodiment is otherwise as described above, and rotation of the lock cap relative to the lock body asserts a clamping force on the clamp member and clamps the wire probe into place.
  • Fig. 1 is a side elevational view of a wire probe/cannula assembly according to a preferred embodiment of the invention.
  • Fig. 2 is a cross-sectional view of the embodiment shown in Fig. 1.
  • Fig. 2 A is an enlarged portion of the cross-sectional view of the embodiment shown in Fig. 2.
  • Fig. 3 is a side elevational view of the cannula of the wire probe/cannula assembly shown in Fig. 1.
  • Fig. 4 is a side cross-sectional view of the locking assembly shown in Fig. 1.
  • Fig. 5 is a partial perspective view of the embodiment shown in Fig. 1, and showing the lock body inserted into the mounting hub of the cannula (in phantom).
  • Fig. 6 is an enlarged view a shown in Fig. 5, and with the lock cap (shown in phantom) rotated to clamp the wire between the flanges of the clamp.
  • Fig. 7 is a partial cutaway view of the perspective view shown in Fig. 6.
  • Fig. 8 A is a perspective view of the lock cap according to a preferred embodiment- of the invention.
  • Fig. 8B is a cross-sectional view of the lock cap illustrated in Fig. 8 A.
  • Fig. 8C is an end view of the lock cap showing the elliptical bore portion.
  • Fig. 8D is a perspective view of the lock cap according to a preferred embodiment of the invention showing the stop lugs that limit rotation of the lock cap around the lock body.
  • Fig. 9 is a partial cross-sectional view of the lock body and lock cap according to a preferred embodiment.
  • Fig. 10 is a side elevational view of a typical wire probe as utilized in the
  • Fig.'s 1 and 2 a preferred embodiment of the wire probe/cannula
  • Assembly 10 includes a cannula 12, a wire probe 13, a locking assembly 15, and a removeable wire cover 17.
  • cannula 12 includes a mounting hub 14 and a pointed hollow needle 16.
  • Mounting hub 14 is a generally cylindrical hollow hub. Needle 16 is disposed in one end of the hub as shown. The opposite end of hub 14 includes a threaded portion 19 that engages with a corresponding threaded portion 20 in locking assembly 15 (Fig. 2).
  • hub 14 may be provided without a threaded portion, and is mountable in locking assembly 15 by other known methods, such as an interference fit.
  • locking assembly 15 includes a lock body 21, a lock cap 22 rotatably mounted on lock body 15, and a central axial bore 24 through which wire probe 13 passes.
  • Lock body 15 includes a tapered front protrusion 28, a central gripping portion 30, and a clamp 32. Tapered front protrusion 28 is sized and shaped to be inserted into a corresponding tapered opening 29 in cannula 12.
  • Lock body 15 also includes a circular flange 33 that receives and resiliently holds hub 14 of cannula 12 (Fig. 2).
  • Clamp 32 extends from the opposite end of lock body 15, and includes an elliptical
  • clamp 32 includes two spaced-apart resilient flanges 35a and 35b. (Fig.'s 4, 6, and ' 7). In other embodiments (not shown), clamp 32 can be a single member with a transverse channel rather than being formed with flanges having distal ends.
  • Lock cap 22 is a hollow member having an open front end 36, a central bore 38 and a rear surface 40.
  • Central bore 38 includes an elliptical bore portion 39.
  • Bore portion 39 includes a major diameter 41that is at least a large as the major diameter 45 of elliptical outer surface 34, and a minor bore diameter 43 that is less than the major diameter 45 of elliptical outer surface 34.
  • the minor bore diameter 43 is about 0.020 inches less than the major diameter 45 of elliptical outer surface 34, but the invention is not limited to any specific amount. Those of skill in the art can readily determine an amount of "interference" necessary for a particular embodiment.
  • the inner surface of front end 36 includes at least one raised flange 42 that resiliently engages a corresponding recess 44 in lock body 21 (Fig. 7).
  • Lock cap 22 is attached to lock body 21 by snapping flange 42 into recess 44. Lock cap 22 is then rotatable on lock body 21 as will be described in greater detail below.
  • probe wire 13 passes through the end of lock cap 22, between flanges 35a and 35b, then through axial bore 24 and cannula 12.
  • Probe wire 26 is axially slidable through the needle assembly 10 to position the probe wire in a desired axial position relative to the cannula and locking assembly.
  • Probe wire 26 can be locked in the desired axial position by operation of the locking assembly. Probe wire 26 is axially slidable when lock cap 22 is rotated to a first position relative to lock body 15 (Fig. 5), and locked in position when lock cap 22 is rotated to a second position relative to lock body 15 (Fig. 6). In the first position the respective long axes of elliptical bore of lock cap 22 and of the split elliptical flanges 32 are aligned. When so positioned, the central channel 36 is spread and probe wire 26 is freely slidable through the channel. Once the probe wire is in the desired position, lock
  • cap 26 is rotated around lock body 21 toward a second position where the long axes of elliptical bore of lock cap 22 is no longer parallel with and may be perpendicular to the long axis of the split elliptical flange 32.
  • the rotation of the lock cap 22 as described exerts a clamping force on the split elliptical flange 32 and clamps probe wire 13 in place.
  • lock cap 24 in a preferred embodiment is limited by lugs 82 in lock body 22 and lugs 84 in lock cap 24. Lugs 82 and 84 are positioned to limit the rotational position of lock cap 22 relative to lock body 22 as it is rotated from the clamped to undamped position and back.
  • clamp 32 could be a single member having an axial bore extending through clamp 32 and lock body 21 rather than a transverse channel.
  • clamp 32 includes a peripheral outer surface as described above, and which squeezes a portion of the axial bore to clamp probe wire 13 in place as lock cap 22 is rotated around lock body 21 as described in the foregoing paragraph.
  • the invention as described above is preferably manufactured of a polymeric material by well-known molding processes, other than, the wire probe which is preferably formed of a metallic material.
  • the invention is not limited to any specific material of construction, and is intended to include any suitable material now known or which is later developed.
  • the invention is not intended to be limited to any particular form of medical procedure, and while described in that context, is suitable for any application which would benefit from having an elongate member lockable in an axial position in a locking assembly.

Landscapes

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

Abstract

L'invention concerne un ensemble de verrouillage et sonde à fil-guide comprenant une canule, un ensemble de verrouillage fixé sur la canule, et une sonde à fil-guide disposée dans un alésage axial s'étendant sur l'ensemble de verrouillage et la canule. L'ensemble de verrouillage comprend des surfaces elliptiques enclenchables qui peuvent être positionnées l'une par rapport à l'autre pour serrer la sonde à fil-guide contre tout mouvement axial.
PCT/US2007/004941 2006-02-24 2007-02-26 Ensemble canule et fil-guide verrouillable WO2007100769A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US36166806A 2006-02-24 2006-02-24
US11/361,668 2006-02-24

Publications (2)

Publication Number Publication Date
WO2007100769A2 true WO2007100769A2 (fr) 2007-09-07
WO2007100769A3 WO2007100769A3 (fr) 2008-08-07

Family

ID=38459614

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2007/004941 WO2007100769A2 (fr) 2006-02-24 2007-02-26 Ensemble canule et fil-guide verrouillable

Country Status (1)

Country Link
WO (1) WO2007100769A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015021009A1 (fr) * 2013-08-05 2015-02-12 Vascular Imaging Corporation Poignée dynamométrique de fil-guide

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5842864A (en) * 1994-12-06 1998-12-01 Unger; Heinz-Dieter Prosthetic superstructure
US5851189A (en) * 1996-05-24 1998-12-22 B. Braun Medical, Inc. Torque device for angioplasty guidewire
US6436099B1 (en) * 1999-04-23 2002-08-20 Sdgi Holdings, Inc. Adjustable spinal tether

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5842864A (en) * 1994-12-06 1998-12-01 Unger; Heinz-Dieter Prosthetic superstructure
US5851189A (en) * 1996-05-24 1998-12-22 B. Braun Medical, Inc. Torque device for angioplasty guidewire
US6436099B1 (en) * 1999-04-23 2002-08-20 Sdgi Holdings, Inc. Adjustable spinal tether

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015021009A1 (fr) * 2013-08-05 2015-02-12 Vascular Imaging Corporation Poignée dynamométrique de fil-guide

Also Published As

Publication number Publication date
WO2007100769A3 (fr) 2008-08-07

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