CA2520607A1 - Coaxial cannula with sealing element - Google Patents

Coaxial cannula with sealing element Download PDF

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Publication number
CA2520607A1
CA2520607A1 CA002520607A CA2520607A CA2520607A1 CA 2520607 A1 CA2520607 A1 CA 2520607A1 CA 002520607 A CA002520607 A CA 002520607A CA 2520607 A CA2520607 A CA 2520607A CA 2520607 A1 CA2520607 A1 CA 2520607A1
Authority
CA
Canada
Prior art keywords
coaxial cannula
sealing element
stopper
needle unit
biopsy needle
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.)
Granted
Application number
CA002520607A
Other languages
French (fr)
Other versions
CA2520607C (en
Inventor
Norbert F. Heske
Thomas Heske
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.)
CR Bard Inc
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of CA2520607A1 publication Critical patent/CA2520607A1/en
Application granted granted Critical
Publication of CA2520607C publication Critical patent/CA2520607C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B10/00—Other methods or instruments for diagnosis, e.g. instruments for taking a cell sample, for biopsy, for vaccination diagnosis; Sex determination; Ovulation-period determination; Throat striking implements
    • A61B10/02—Instruments for taking cell samples or for biopsy
    • A61B10/0233—Pointed or sharp biopsy instruments
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B10/00—Other methods or instruments for diagnosis, e.g. instruments for taking a cell sample, for biopsy, for vaccination diagnosis; Sex determination; Ovulation-period determination; Throat striking implements
    • A61B10/02—Instruments for taking cell samples or for biopsy
    • A61B10/0233—Pointed or sharp biopsy instruments
    • A61B10/0266—Pointed or sharp biopsy instruments means for severing sample
    • A61B10/0275—Pointed or sharp biopsy instruments means for severing sample with sample notch, e.g. on the side of inner stylet
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B10/00—Other methods or instruments for diagnosis, e.g. instruments for taking a cell sample, for biopsy, for vaccination diagnosis; Sex determination; Ovulation-period determination; Throat striking implements
    • A61B10/02—Instruments for taking cell samples or for biopsy
    • A61B10/0233—Pointed or sharp biopsy instruments
    • A61B10/0283—Pointed or sharp biopsy instruments with vacuum aspiration, e.g. caused by retractable plunger or by connected syringe
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/34—Trocars; Puncturing needles
    • A61B17/3417—Details of tips or shafts, e.g. grooves, expandable, bendable; Multiple coaxial sliding cannulas, e.g. for dilating
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/34—Trocars; Puncturing needles
    • A61B17/3417—Details of tips or shafts, e.g. grooves, expandable, bendable; Multiple coaxial sliding cannulas, e.g. for dilating
    • A61B17/3421—Cannulas
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/34—Trocars; Puncturing needles
    • A61B17/3462—Trocars; Puncturing needles with means for changing the diameter or the orientation of the entrance port of the cannula, e.g. for use with different-sized instruments, reduction ports, adapter seals
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/34—Trocars; Puncturing needles
    • A61B17/3498—Valves therefor, e.g. flapper valves, slide valves
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/02—Devices for withdrawing samples
    • G01N1/04—Devices for withdrawing samples in the solid state, e.g. by cutting
    • G01N1/08—Devices for withdrawing samples in the solid state, e.g. by cutting involving an extracting tool, e.g. core bit
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/34—Trocars; Puncturing needles
    • A61B17/3474—Insufflating needles, e.g. Veress needles

Abstract

The invention relates to a coaxial cannula (1) for extracting samples from tissue comprising a biopsy needle unit (9) provided with a space for sample extraction and a sample separation unit (21) which coaxially encompasses the biopsy needle (9) on an external wall and is longitudinally movable. The inventive coaxial cannula (1) comprises a sealing element (3) which is arranged on the proximal end thereof and closes the space between the intern al wall of the coaxial cannula and the external wall of the sample separation unit. Said coaxial cannula (1) is characterised in that the sealing element (3) opens an air outlet when the biopsy needle unit (9) is inserted, and prevents air intake when the biopsy needle unit (9) is positioned and vacuum is produced in the internal chamber of the biopsy needle.

Claims (4)

1) Coaxial cannula that can be used in tissue, in which for removing tissue are a biopsy needle unit with specimen removal space and a longitudinally movable specimen separating device that coaxially encloses the biopsy needle on the exterior wall, and whereby the coaxial cannula has on its proximal end a sealing element that encloses the space between the interior wall of the coaxial cannula and the exterior wall of the specimen separating device, characterized in that the sealing element (3) releases the air outlet when the needle unit is inserted and prevents air from entering after the needle unit has been positioned and a vacuum has been created in the biopsy needle interior space.
2) Coaxial cannula in accordance with claim 1, characterized in that a hose-type sealing element (3) is pushed over the proximal end of the coaxial cannula tube (1), the interior diameter of which is dimensioned so that it leaves open a slight gap between the sealing element and the biopsy needle unit (9), and in that the elasticity of the sealing element (3) is such that, given slight underpressure in the gap between the exterior wall of the needle unit (9) or the specimen separating device (21) and the interior wall of the coaxial cannula, the proximal end of the sealing element comes to act as a seal against the needle unit or the specimen separating device.
3) Coaxial cannula in accordance with claim 1 or 2, characterized in that when employing a biopsy device with a guide roller (13), provided on the distal surface of the guide roller is a stopper (14) with sealing elements (16, 17), which [stopper] is inserted into a counterpiece (15) on the proximal end of the cap of the coaxial cannula such that the opening is closed shortly prior to placing the distal surface of the guide roller on the proximal surface of the cap of the coaxial cannula.
4) Coaxial cannula in accordance with claim 1, characterized in that, when using an intermediate piece (18) between the distal end face of the guide roller with stopper (14) and the proximal end face of the cap with counterpart, the intermediate piece has on its proximal side a countercoupling part as a type of interior bore into which the stopper of the guide roller (13) with sealing elements is inserted and in that on the distal side the intermediate piece (18) has a stopper with sealing elements [sic] (19), which [stopper] is inserted into the proximal-side counterpiece of the cap of the coaxial cannula.
CA2520607A 2003-03-29 2004-03-29 Coaxial cannula with sealing element Expired - Lifetime CA2520607C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE20305093U DE20305093U1 (en) 2003-03-29 2003-03-29 Coaxial cannula with sealing element
DE20305093.2 2003-03-29
PCT/EP2004/003327 WO2004086977A1 (en) 2003-03-29 2004-03-29 Coaxial cannula provided with a sealing element

Publications (2)

Publication Number Publication Date
CA2520607A1 true CA2520607A1 (en) 2004-10-14
CA2520607C CA2520607C (en) 2012-07-03

Family

ID=28051430

Family Applications (1)

Application Number Title Priority Date Filing Date
CA2520607A Expired - Lifetime CA2520607C (en) 2003-03-29 2004-03-29 Coaxial cannula with sealing element

Country Status (10)

Country Link
US (6) US7645239B2 (en)
EP (1) EP1620016B1 (en)
JP (1) JP4476279B2 (en)
AT (1) ATE369796T1 (en)
AU (1) AU2004226795A1 (en)
CA (1) CA2520607C (en)
DE (2) DE20305093U1 (en)
ES (1) ES2290687T3 (en)
MX (1) MXPA05010443A (en)
WO (1) WO2004086977A1 (en)

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US20170252021A1 (en) 2017-09-07
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US8845547B2 (en) 2014-09-30
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US7645239B2 (en) 2010-01-12
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US9980706B2 (en) 2018-05-29
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US7740598B2 (en) 2010-06-22
US20180193004A1 (en) 2018-07-12
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JP2006521138A (en) 2006-09-21
US9706980B2 (en) 2017-07-18

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