CN102805659A - Split-hole puncture needle cannula - Google Patents
Split-hole puncture needle cannula Download PDFInfo
- Publication number
- CN102805659A CN102805659A CN2011101481537A CN201110148153A CN102805659A CN 102805659 A CN102805659 A CN 102805659A CN 2011101481537 A CN2011101481537 A CN 2011101481537A CN 201110148153 A CN201110148153 A CN 201110148153A CN 102805659 A CN102805659 A CN 102805659A
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- CN
- China
- Prior art keywords
- puncture needle
- closing member
- puncture
- nook closing
- sleeve pipe
- 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.)
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Abstract
The invention discloses a split-hole puncture needle cannula, wherein an elliptic side hole (1) is formed in a far side of the tubular puncture needle cannula from the top in a proper distance; an arc needle core (4) can turn by the side hole smoothly; and a longitudinal opening (2) is formed on opposite 180-degree tail position of the elliptic side opening of the tubular puncture needle cannula. The width of the longitudinal opening allows the needle core to expand out (3); the longitudinal opening has a certain length; and the curve radius that the arc needle core turns can be increased by the longitudinal opening, so that the puncture needle cannula can turn easily.
Description
The present invention relates to a kind ofly, utilize turning to that this sleeve pipe and corresponding arc nook closing member can realize puncturing perforate Puncture needle sleeve pipe.
At present; Relate to having of letting the puncture nook closing member turns we design a kind of charge shaft to the vertical direction method of opening a side opening reach puncture and turn to that (multiaxis of deep tissue is to perforator in a kind of body; Number of patent application: purpose 201020582966.8); But in test subsequently, find: when the side opening opening is excessive; Though nook closing member is to pass and realized to turn to from the side mouth, thisly turn to still that main what rely on is the elastically-deformable effect of nook closing member oneself, the casing wall side opening of opening part can not effectively be brought into play point action to turning to of nook closing member; And though the fulcrum that turns to can be provided when too small openings, nook closing member and casing wall angle too small radius of curvature are too little, nook closing member and casing wall contact surface are too little rough again, resistance is bigger, blocks pin easily.
In order to overcome the disadvantage that existing puncture needle can not effectively turn to; It is a kind of to perforate Puncture needle sleeve pipe that the present invention provides; Increase a stringer opening again at original side opening offside exactly, utilize this to split the borehole jack pipe and cooperate a series of puncture nook closing members, just can more effectively realize turning to of puncture needle.
The technical solution adopted for the present invention to solve the technical problems is: in far-end (the head end promptly punctures) side of tubulose puncture needle sleeve pipe far from the top suitably distance (be preferably 1mm～5mm) open an oval side opening, this ellipse side opening is the passage of puncture nook closing member oblique puncture in tissue.180 ° of positions slightly caudad of offside in this elliptical openings; A stringer opening is arranged; Allow the puncture nook closing member the time from the oval side opening direction of axially turning to of puncture casing; Part is in nook closing member on the radius of curvature from this stringer opening bulging, so just can under the situation that does not increase the puncture casing diameter, increase the radius of curvature of nook closing member as much as possible, and the turning to of nook closing member of puncturing is more prone to.This adopts material such as rustless steel, polyurethane or carbon fiber to the perforate paracentesis trocar.
The invention has the beneficial effects as follows: owing to allow the puncture nook closing member the time from the oval side opening direction of axially turning to of puncture casing to the perforate paracentesis trocar; Part is in nook closing member on the radius of curvature from the stringer opening bulging of offside; So just can under the situation that does not increase the puncture casing diameter, increase the radius of curvature of nook closing member as much as possible, turning to of nook closing member of puncture is more prone to.
Below in conjunction with accompanying drawing and embodiment the present invention is further specified.
Fig. 1 is to perforate paracentesis trocar sleeve pipe front end schematic perspective view.
Fig. 2 is the following view to perforate paracentesis trocar sleeve pipe front end, the axonometric chart of promptly observing from the stringer opening direction.
Fig. 3 is the schematic perspective view of arc puncture nook closing member front end.
Fig. 4 is the schematic perspective view that passes the situation when organizing that the telescopic oval side opening of perforate paracentesis trocar is arrived when arc puncture nook closing member needle point.
Among the figure: 1. the oval side opening of puncture needle sleeve pipe; 2. the stringer side opening of puncture needle sleeve pipe; 3. nook closing member bulging part from the stringer side opening of puncture needle sleeve pipe punctures; 4. the puncture nook closing member passes from the oval side opening of puncture needle sleeve pipe, turns to the back to get into tissue.
The specific embodiment:
At Fig. 1, in 2, be to perforate paracentesis trocar sleeve pipe front end volume rendering sketch map, can find out among the figure distal side at tubulose puncture needle sleeve pipe apart from the top suitably distance open an oval side opening (1).180 ° of oval side opening offsides lean on telescopic tail end that one stringer opening (2) is arranged slightly.The diameter of the width ratio puncture nook closing member of stringer opening is big slightly, allows the puncture nook closing member to pass through, and the length of stringer opening is decided according to the requirement of the radius of curvature needs increase of puncture nook closing member.
Fig. 3 is an arc puncture nook closing member front-end view, and puncture nook closing member front end itself has certain radian, but after getting into straight tubulose puncture needle sleeve pipe tail end, the arch section of arc puncture nook closing member receives the restriction of puncture needle sleeve pipe and stretches.
Fig. 4 turns to the back to get into the sketch map of tissue when oval side opening that arc puncture nook closing member (4) passes puncture casing: owing to the arc nook closing member itself has radian; Therefore when advancing to the oval side opening of puncture needle sleeve pipe front end; The puncture nook closing member relies on the elastic return arc of self; At this moment the nook closing member needle point that punctures just can get into tissue from oval side opening, realizes turning to.
In the steering procedure of puncture nook closing member, if the space that relies on the Puncture needle sleeve bore to be provided merely turns to, the radius of curvature that the nook closing member that then punctures turns to is too little, turns to difficulty.And in the design, a stringer opening is arranged owing to oval side opening offside to perforate Puncture needle sleeve pipe, and the part puncture nook closing member that at this moment is in the radius of curvature turning can be from the outside bulging of stringer opening part, and the result has increased radius of curvature, makes to turn than being easier to.
Claims (3)
1. one kind to perforate Puncture needle sleeve pipe, it is characterized in that: the distal side of tubulose puncture needle sleeve pipe apart from the top suitably distance open an oval side opening, there is a stringer opening the 180 ° of positions slightly caudad of offside in elliptical openings.
2. according to claim 1 to perforate Puncture needle sleeve pipe, it is characterized in that: at the oval side opening of the far-end of tubulose puncture needle sleeve pipe, the arc nook closing member can turn to through this side opening smoothly.
3. according to claim 1 to perforate Puncture needle sleeve pipe, it is characterized in that: at the stringer opening of elliptical openings offside, the width of this stringer opening allows the bulging of puncture nook closing member, and certain-length is arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101481537A CN102805659A (en) | 2011-05-31 | 2011-05-31 | Split-hole puncture needle cannula |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101481537A CN102805659A (en) | 2011-05-31 | 2011-05-31 | Split-hole puncture needle cannula |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102805659A true CN102805659A (en) | 2012-12-05 |
Family
ID=47229650
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101481537A Pending CN102805659A (en) | 2011-05-31 | 2011-05-31 | Split-hole puncture needle cannula |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102805659A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2378008Y (en) * | 1999-03-31 | 2000-05-17 | 山东省邹平县人民医院 | Double-channel puncture anesthesia needle |
| US20100168777A1 (en) * | 2008-12-29 | 2010-07-01 | Stangenes Todd R | Tissue puncture assemblies and methods for puncturing tissue |
| EP1758507B1 (en) * | 2004-03-29 | 2010-10-27 | Soteira Inc. | Orthopedic surgery access devices |
| CN201840506U (en) * | 2010-10-29 | 2011-05-25 | 刘苗生 | Multiaxial puncture device for internal deep tissues |
| CN202086545U (en) * | 2011-05-31 | 2011-12-28 | 浙江海洋学院 | Puncture needle cannula with opposite openings |
-
2011
- 2011-05-31 CN CN2011101481537A patent/CN102805659A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2378008Y (en) * | 1999-03-31 | 2000-05-17 | 山东省邹平县人民医院 | Double-channel puncture anesthesia needle |
| EP1758507B1 (en) * | 2004-03-29 | 2010-10-27 | Soteira Inc. | Orthopedic surgery access devices |
| US20100168777A1 (en) * | 2008-12-29 | 2010-07-01 | Stangenes Todd R | Tissue puncture assemblies and methods for puncturing tissue |
| CN201840506U (en) * | 2010-10-29 | 2011-05-25 | 刘苗生 | Multiaxial puncture device for internal deep tissues |
| CN202086545U (en) * | 2011-05-31 | 2011-12-28 | 浙江海洋学院 | Puncture needle cannula with opposite openings |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20121205 |