EP0354228A1 - Biopsiekanüle - Google Patents
BiopsiekanüleInfo
- Publication number
- EP0354228A1 EP0354228A1 EP89901127A EP89901127A EP0354228A1 EP 0354228 A1 EP0354228 A1 EP 0354228A1 EP 89901127 A EP89901127 A EP 89901127A EP 89901127 A EP89901127 A EP 89901127A EP 0354228 A1 EP0354228 A1 EP 0354228A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- flap
- plunger
- tissue
- slot
- 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.)
- Withdrawn
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
- A61B10/0266—Pointed or sharp biopsy instruments means for severing sample
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/32—Surgical cutting instruments
- A61B17/3205—Excision instruments
- A61B17/3207—Atherectomy devices working by cutting or abrading; Similar devices specially adapted for non-vascular obstructions
- A61B17/320725—Atherectomy devices working by cutting or abrading; Similar devices specially adapted for non-vascular obstructions with radially expandable cutting or abrading elements
Definitions
- the subject of this invention is a needle for performing biopsies i.e. for removal of pieces of tissue from human or animal bodies.
- the needle which is the subject of this application is of particular use in performing pleural biopsies.
- Needles for performing biopsies are already well known and such known needles normally comprise a probe which carries near the distal end a scoop projecting from the side of the probe, a biopsy being performed by inserting the probe through an incision made in the skin and pressing the probe into the body far enough for the scoop to reach the portion of the body from which a portion is to be removed. The probe is then withdrawn, the scoop entraining a portion of the tissue of the body and as the probe is removed this portion of tissue held by the scoop is brought back out for medical examination.
- the known biopsy needles suffer from the disadvantage that their results are extremely unpredictable and in fact usually a suitable portion of tissue is removed in little more than 70% of such biopsy operations. Even when a satisfactory portion of tissue is removed this frequently is accompanied by a piece of unwanted tissue. Also the probe may cause more damage than necessary to surrounding tissue and if the tissue sample obtained is unsatisfactory the needle must be re-inserted into the body and a fresh attempt made to obtain a satisfactory tissue sample.
- a biopsy needle according to the invention incorporates an elongated body pointed at one end and a tissue-removing edge directed backwardly from the pointed end and is characterized in that the tissue-removing edge is formed on a flap supported by the body and movable between a retracted position in which the tissue-removing edge lies within the lateral confines of the body and an extended position in which the tissue-removing edge lies beyond the lateral confines of the body.
- the proximal end of the needle i.e. the end remote from the pointed end, may be formed as a handle supporting operating means coupled to the flap and operative to move the flap from the retracted position to the extended position and vice versa.
- the operating means may include locking means to lock the flap in the chosen position.
- the flap may be formed as a flat flap or may be curved in the form of a scoop.
- the tissue-removing edge may be formed as a straight edge or may be formed with serrations.
- the tubular body may be circular or elliptical or polygonal in cross section.
- the flap may be mounted on a plunger slidable within the tubular body the wall of which in this construction is formed with an aperture with which the flap may be brought into register by an appropriate sliding movement of the plunger.
- the flap may be pivoted at one end to the plunger and may be spring-urged to swing outwardly from the plunger, the tissue-removing edge being at the end of the flap remote from the pivot.
- the flap is formed of spring material, is formed at one end with the tissue- removing edge and is attached at the other end to the plunger, the flap being shaped to tend to spring outwardly from the plunger.
- the interior of the tubular body may have a circular cross section and the plunger may be rotatable as well as slidable in the tubular body.
- the handle may be tubular and may thereupon be formed with a slot having two axially disposed portions circumferentially spaced and connected at their distal ends by a circumferential portion, one of the axially disposed slot portions being open at its proximal end, and the plunger presents a pin engaging the slot, the position of the pin on the plunger and the positions of the various portions of the slot with respect to the tubular body being such that when the pin on the plunger is engaged with the open ended axial portion of the slot the flap is circumferentially displaced from the aperture in the tubular body.
- the length of said axial portion is such that when the pin is at the distal end of the slot portion the flap is nearer the distal end of the tubular body than the aperture while being still circumferentially displaced from the aperture.
- Rotating the plunger so that the pin moves along the circumferential portion of the slot to the end where it joins the axial portion of the slot brings the flap into line with the aperture although the flap is still nearer the distal end of the tubular body than the aperture, then retracting the plunger along said other axial portion of the slot towards the proximal end of the slot brings the flap into register with the aperture in the tubular body and frees the flap to swing out and project through the aperture.
- the pointed tip on the needle may be formed on the distal end of the tubular body which has then a closed distal end or may be formed on the distal end of the plunger whereupon the distal end of the tubular body is open to allow the pointed end of the plunger to protrude when the needle is being inserted.
- FIG. 1 illustrates a tubular body portion of the needle
- Fig. 2 illustrates a plunger movable" through the tubular body portion
- Fig. 3 illustrates an assembled biopsy needle with the flap in the extended position
- Fig. 4 is an enlarged view of the distal end of the plunger.
- FIG. 1 denotes a tubular body formed with a slot 2 in the wall near the distal end of the body 1 and 3 denotes a handle attached to the tube 1, the handle 3 being formed with a slot with two axial portions 4 and 5 joined at the distal ends of the slots by a circumferential portion 6.
- 7 denotes a plunger slidable through the tubular body portion 1, the plunger being pointed as at 8 at the distal end and carrying a flap 9 pivoted at 10 to the plunger 7.
- the flap 9 is accommodated in a recess 11 in the p l u n g e r 7 large enough to hold the flap 9 within the diametral confines of the plunger 7 when the flap is folded downwardly towards the plunger 7.
- the flap is normally urged by a spring 12 (Fig. 4) to move to the extended position as illustrated.
- the plunger presents a pin 13 engageable with the slot constituted by the portions 4, 5 and
- the plunger is now in a position in which the flap9 is nearer the distal end of the body portion 1 than the slot 2 but is still retained in its retracted position by the wall of the tubular body portion 1.
- the plunger 7 is now rotated to cause the pin 13 to move along the circumferential slot 6 until it is opposite the slot portion 5.
- the flap 9 is in line with the slot 2 in the body portion 1 although still nearer the distal end of the body portion 1 than the slot 2 and still retained in its retracted position.
- the needle with the flap 9 out of register with the slot 2 is entered into the organ from which a tissue sample is to be taken through an incision made in the skin and when the distal end is at the position in the body where a sample is to be taken the movements described above to cause the flap 9 to protrude from the body portion 1 are performed. Thereupon the needle is withdrawn for a short distance to cause the flap 9 to remove and entrain a portion of the tissue of the organ. The plunger 7 is now advanced again towards the distal end of the body portion. The pin 13 is moved along the slot portion 5 up to the circumferential slot 6. This again causes the flap 9 to come against the forward end of the slot 2 and to retract and enter the recess 11, taking with it the portion of tissue removed.
- the plunger is then rotated so that the pin 13 moves along the circumferential slot 6 until it is opposite the slot portion 5. This again brings the retracted flap 9 out of alignment with the slot 2 in the body portion 1.
- the plunger 7 may then be withdrawn completely from the body po rt i on 1 , t h e p i n 1 2 movi ng a lo n g a n d out o f the slot portion 5.
- Complete removal of the plunger 7 brings with it the portion of tissue removed by the flap 9 Leaving the body portion 1 still projecting into the organ.
- the sample removed by the flap 9 may now be examined. If it is satisfactory the body portion 1 may be removed from the body without further damage to the body.
- the plunger 7 may be re-inserted as before and a fresh sample taken. It may be desired to take several samples at different depths in the body. This can be done merely by pressing the needle different distances into the body. All this may be done as an operation with only one insertion of the needle so that the minimum of damage is done to the organ and at the same time the samples removed can be seen to be completely satisfactory for clinical purposes before the needle is removed.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8729648 | 1987-12-19 | ||
GB878729648A GB8729648D0 (en) | 1987-12-19 | 1987-12-19 | Biopsy needle |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0354228A1 true EP0354228A1 (de) | 1990-02-14 |
Family
ID=10628756
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP89901127A Withdrawn EP0354228A1 (de) | 1987-12-19 | 1988-12-19 | Biopsiekanüle |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0354228A1 (de) |
AU (1) | AU2919689A (de) |
GB (1) | GB8729648D0 (de) |
WO (1) | WO1989005608A1 (de) |
ZA (1) | ZA889329B (de) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5224488A (en) * | 1992-08-31 | 1993-07-06 | Neuffer Francis H | Biopsy needle with extendable cutting means |
US5687739A (en) * | 1995-12-06 | 1997-11-18 | Interventional Concepts, Inc. | Biopsy specimen cutter |
WO1999004704A2 (en) | 1997-07-24 | 1999-02-04 | Mcguckin James F Jr | Breast surgery method and apparatus |
US6626903B2 (en) | 1997-07-24 | 2003-09-30 | Rex Medical, L.P. | Surgical biopsy device |
WO2002062226A1 (en) * | 2001-02-05 | 2002-08-15 | Tyco Healthcare Group Lp | Biopsy apparatus and method |
US20150245817A1 (en) | 2014-02-28 | 2015-09-03 | 3DBiopsy LLC | Three-dimensional tissue mapping system |
WO2016019097A1 (en) * | 2014-07-31 | 2016-02-04 | Boston Scientific Scimed, Inc. | Scooper core needle |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1867624A (en) * | 1930-04-01 | 1932-07-19 | Memorial Hospital For The Trea | Device for obtaining biopsy specimens |
US3175554A (en) * | 1963-03-26 | 1965-03-30 | Becton Dickinson Co | Split biopsy needle |
DE3148306A1 (de) * | 1981-12-03 | 1983-06-30 | Karl Fritz 1000 Berlin Reich | Hohlnadelbesteck mit system |
-
1987
- 1987-12-19 GB GB878729648A patent/GB8729648D0/en active Pending
-
1988
- 1988-12-13 ZA ZA889329A patent/ZA889329B/xx unknown
- 1988-12-19 WO PCT/GB1988/001153 patent/WO1989005608A1/en not_active Application Discontinuation
- 1988-12-19 EP EP89901127A patent/EP0354228A1/de not_active Withdrawn
- 1988-12-19 AU AU29196/89A patent/AU2919689A/en not_active Abandoned
Non-Patent Citations (1)
Title |
---|
See references of WO8905608A1 * |
Also Published As
Publication number | Publication date |
---|---|
ZA889329B (en) | 1989-11-29 |
GB8729648D0 (en) | 1988-02-03 |
AU2919689A (en) | 1989-07-19 |
WO1989005608A1 (en) | 1989-06-29 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE CH DE FR GB IT LI LU NL SE |
|
17P | Request for examination filed |
Effective date: 19890918 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 19910703 |