CN201996728U - Single-bend flute needle for use in vitreoretinal surgeries - Google Patents
Single-bend flute needle for use in vitreoretinal surgeries Download PDFInfo
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- CN201996728U CN201996728U CN2011200686268U CN201120068626U CN201996728U CN 201996728 U CN201996728 U CN 201996728U CN 2011200686268 U CN2011200686268 U CN 2011200686268U CN 201120068626 U CN201120068626 U CN 201120068626U CN 201996728 U CN201996728 U CN 201996728U
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- hollow needle
- needle
- needle tubing
- tube
- flute
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Abstract
The utility model discloses a single-bend flute needle for use in vitreoretinal surgeries, which comprises a hollow needle tube, a threaded socket, a silicone tube and a needle stem, wherein the hollow needle tube is connected with the needle stem through a threaded socket; the side wall of the tail part tube of the hollow needle tube has a hole; the silicone tube is sleeved on the tail part of the hollow needle tube and covers the hole; the needle stem is hollow and has a window; the silicone tube is accommodated in the needle stem window; the silicone tube and the cavity in the needle stem of the flute needle are jointed tightly; a small hole which is communicated with the hollow needle tube is formed in the center of the silicone tube; the needle head of the flute needle is communicated with the silicone tube and is closed; the tail end of the hollow needle tube is wedged; and the hollow needle is bent away from a central axis at a place which is 2 to 3 millimeters away from the tail end, and the bending included angle alpha is between 90 and 123 degrees. When the single-bend flute needle is used, iatrogenic cataract can be avoided effectively, subretinal fluid in surrounding cracks can be absorbed smoothly, and the retina can be reset successfully; and the single-bend flute needle can be widely used vitreoretinal surgeries.
Description
Technical field
This utility model relates to a kind of medical operating needle set, particularly a kind of flute pin that can be used for the retina operation on vitreous.
Background technology
Along with popularizing of modern vitrectomy technology, treated timely and effectively because of the blind patient of detachment of retina in a large number.Yet in the operation process of reality, for the detachment of retina patient that the peripheral retina ceasma causes, the medical personnel uses traditional straight type flute pin to be used for reattachment of retina in art to have certain difficulty.1), when inhaling the following subretinal fluid of homonymy peripheral retina ceasma its technical barrier shows as following 2 points:, directly type flute pin is easy to touch crystalline lens, causes iatrogenic cataract; 2), no matter to be that directly the syringe needle of type flute pin can't form effective attaching with the choroid under the ceasma, causes subretinal fluid to exhaust fully when inhaling the following subretinal fluid of homonymy or homonymy peripheral retina ceasma.Given this, be badly in need of traditional flute pin is improved.
The utility model content
The purpose of this utility model provides a kind of curved flute pin of homonymy that is used for the retina operation on vitreous, solve traditional flute pin and be easy to touch crystalline lens, causes iatrogenic cataractous technical problem; Also to solve traditional flute pin and can't form effective attaching, the technical problem that causes subretinal fluid to exhaust fully with the choroid under the ceasma.
The technical solution of the utility model:
A kind of curved flute pin of homonymy that is used for the retina operation on vitreous, comprise hollow needle tubing, the screw bayonet socket, silica gel tube and needle handle, described hollow needle tubing is connected by the screw bayonet socket with needle handle, the afterbody pipe sidewall of hollow needle tubing has a hole, described silica gel tube is enclosed within the afterbody of hollow needle tubing and covers described hole, described needle handle is hollow and has window, silica gel tube is contained in the needle handle window, cavity in silica gel tube and the flute pin needle handle closely attaches, there is the aperture that is connected with the hole of hollow needle tubing in the central authorities of described silica gel tube, flute pin syringe needle is communicated with silica gel tube and is airtight, it is characterized in that: described hollow needle tubing end is wedge shape, the angle of wedge is 70 ° ± 15 °, described hollow needle tubing has a bending that departs from the axis in distance terminal 2 mm～3 mm parts, 90 °＜α of crooked angle＜123 °, hollow needle tubing is 27mm～38mm apart from the distance of screw bayonet socket.
Described hollow needle tubing has a bending that departs from the axis in the terminal 2.63mm part of distance.
The length of described hollow needle tubing (1) bending section need satisfy:
GC?=?3.6-[5.5/tan(180-α)]?（mm）；
Then flute pin syringe needle remains segment length: HG=35-GC (mm).
The model of described hollow needle tubing is 18G, 20G, 23G or 25G.
The length overall of the curved flute pin of described homonymy is 10～20cm.
The angle of wedge of described hollow needle tubing end is 70.3 °.
Compared with prior art the utlity model has following characteristics and beneficial effect:
This utility model has overcome traditional straight type flute pin lenticular shortcoming of touching easily, has also solved traditional straight type flute pin and can't effectively attach choroid, the technical problem of the subretinal fluid that can't exhaust fully.
This utility model has designed the angle of the angle of bend and the curved flute pin syringe needle end of curved flute pin, can be from scleral incision to the work of homonymy peripheral retina direction, and syringe needle can form effective attaching with the choroid under the ceasma, subretinal fluid can be exhausted fully; Be designed to arc in flute pin corner, thereby reduce the resistance that curved flute pin enters scleral incision, during subretinal fluid under inhaling homonymy peripheral retina ceasma, can not touch crystalline lens, effectively avoid causing iatrogenic cataractous generation, can absorb simultaneously the subretinal fluid under the peripheral ceasma smoothly, retina is successfully resetted.This utility model can be used for the retina operation on vitreous for the improvement of existing medical apparatus and instruments, when particularly the peripheral retina ceasma exists, is used in ceasma position sucking-off subretinal fluid.
Description of drawings
The utility model is described in more detail below in conjunction with accompanying drawing.
Fig. 1 is a profile sketch map of the present utility model.
Fig. 2 is the sketch map of hollow needle tubing end.
Fig. 3 is the sketch map of hollow needle canal curvature section design.
The hollow shank of description of drawings: 1-, 2-silica gel tube, 3-needle handle, 4-screw bayonet socket, 5-aperture.
The specific embodiment
Embodiment is referring to Fig. 1, shown in Figure 2, a kind of curved flute pin of homonymy that is used for the retina operation on vitreous, comprise hollow needle tubing 1, screw bayonet socket 4, silica gel tube 2 and needle handle 3, described hollow needle tubing 1 is connected by screw bayonet socket 4 with needle handle 3, the afterbody pipe sidewall of hollow needle tubing 1 has a hole, described silica gel tube 2 is enclosed within the afterbody of hollow needle tubing 1 and covers described hole, described needle handle 3 is hollow and has window, silica gel tube 2 is contained in needle handle 3 windows, cavity in silica gel tube 2 and the flute pin needle handle 3 closely attaches, there is the aperture 5 that is connected with the hole of hollow needle tubing 1 in the central authorities of described silica gel tube 2, flute pin syringe needle is communicated with silica gel tube 2 and is airtight, it is characterized in that: described hollow needle tubing 1 end is wedge shape, the angle of wedge is 70 ° ± 15 °, described hollow needle tubing 1 has a bending that departs from the axis in distance terminal 2 mm～3 mm parts, 90 °＜α of crooked angle＜123 °, and hollow needle tubing 1 is 27mm～38mm apart from the distance of screw bayonet socket 4.
For example, described hollow needle tubing 1 has a bending that departs from the axis in the terminal 2.63mm part of distance, and crooked angle α is 100 °, and hollow needle tubing 1 is 32.37mm apart from the distance of screw bayonet socket (4).
The length of described hollow needle tubing 1 bending section need satisfy:
GC?=?3.6-[5.5/tan(180-α)]?（mm） ；
Then flute pin syringe needle remains segment length: HG=35-GC (mm).
The model of described hollow needle tubing 1 is 18G, 20G, 23G or 25G.
The length overall of the curved flute pin of described homonymy is 10～20cm.
The angle of wedge of described hollow needle tubing 1 end is 70.3 °.
Embodiment designs with the human eye of normal size, thinks that promptly axial length of the eye is 24 mm.Require to work ora serrata during work, normal eyeball ora serrata generally is positioned at 8.5mm behind the corneoscleral junction.If corneal diameter is 12mm, then ora serrata is apart from the central 14.5mm of cornea.
Shown in Fig. 3, AO is the eyeball radius, 12mm.AD is an eyeball standard anterior chamber depth, is 4mm.DE represents lens thickness, also is 4mm, then EO=4mm.Getting corneal diameter is 12mm, and then corneal radii is 6mm, and during the column criterion vitrectomy, scleral incision is 3.5mm behind limbus of corneae, arc AB=6+3.5=9.5mm then, and arc BC equals 5.3mm as calculated, and arc ABC is 14.8mm, and the C point is positioned at the ora serrata place just.Standard flute pin needle length is generally about 30-40mm value 35mm.HBGC represents hollow needle tubing among the figure, i.e. flute pin syringe needle, and then as calculated, if ∠ HGC=is α (90 °＜α＜123 °), then the length GC of flute pin bending section need satisfy:
GC?=?3.6-[5.5/tan(180-α)]?（mm）?；
Flute pin syringe needle residue segment length: HG=35-GC(mm) then.
Flute pin syringe needle end plane becomes the angle should be substantially equal to 70.3 ° equally with flute pin syringe needle.
The syringe needle thickness of two kinds of curved flute pins all according to existing operation on vitreous system design, designs several thicknesses, is respectively 18G, 20G, 23G and 25G.In addition, curved flute pin will be designed to arc in the corner, makes the flute pin can enter scleral incision comparatively smoothly, reduces the resistance that the corner enters otch.
Simultaneously, flute pin syringe needle end plane becomes the angle should be substantially equal to 70.3 ° with flute pin syringe needle.
As shown in Figure 1, needle handle 3 is hollow, can hold silica gel tube 2.Hollow needle tubing 1 is communicated with silica gel tube 2 and is airtight.Cavity in silica gel tube 2 and the flute pin needle handle 3 closely attaches, and there is aperture 5 in the central authorities of silica gel tube 2, can allow to point shutoff or unclamp, with the draining fluids that communicates in flute pin inner formation negative pressure or with the external world.Hollow needle tubing 1 and needle handle 3 can be changed different flute pin syringe needles by 4 butt joints of screw bayonet socket.Hollow needle tubing 1 and needle handle 3 are made of stainless steel material.Hollow needle tubing 1 is according to the diameter design of existing vitrectomy system.About the about 15cm of the total length of whole flute pin.Hollow needle tubing corner is designed to arc, thereby reduces the resistance that curved flute pin enters scleral incision.
Claims (6)
1. curved flute pin of homonymy that is used for the retina operation on vitreous, comprise hollow needle tubing (1), screw bayonet socket (4), silica gel tube (2) and needle handle (3), described hollow needle tubing (1) is connected by screw bayonet socket (4) with needle handle (3), the afterbody pipe sidewall of hollow needle tubing (1) has a hole, described silica gel tube (2) is enclosed within the afterbody of hollow needle tubing (1) and covers described hole, described needle handle (3) is hollow and has window, silica gel tube (2) is contained in needle handle (3) window, cavity in silica gel tube (2) and the flute pin needle handle (3) closely attaches, there is the aperture (5) that is connected with the hole of hollow needle tubing (1) in the central authorities of described silica gel tube (2), flute pin syringe needle is communicated with silica gel tube (2) and is airtight, it is characterized in that: described hollow needle tubing (1) end is wedge shape, the angle of wedge is 70 ° ± 15 °, described hollow needle tubing (1) has a bending that departs from the axis in distance terminal 2 mm～3 mm parts, 90 °＜α of crooked angle＜123 °, hollow needle tubing (1) is 27mm～38mm apart from the distance of screw bayonet socket (4).
2. the curved flute pin of homonymy that is used for the retina operation on vitreous according to claim 1 is characterized in that: described hollow needle tubing (1) has a bending that departs from the axis in the terminal 2.63mm part of distance.
3. the curved flute pin of homonymy that is used for the retina operation on vitreous according to claim 1, it is characterized in that: the length of described hollow needle tubing (1) bending section need satisfy:
GC?=?3.6-[5.5/tan(180-α)] （mm）；
Then flute pin syringe needle remains segment length: HG=35-GC (mm).
4. the curved flute pin of homonymy that is used for the retina operation on vitreous according to claim 1, it is characterized in that: the model of described hollow needle tubing (1) is 18G, 20G, 23G or 25G.
5. the curved flute pin of homonymy that is used for the retina operation on vitreous according to claim 1, it is characterized in that: the length overall of the curved flute pin of described homonymy is 10～20cm.
6. the curved flute pin of homonymy that is used for the retina operation on vitreous according to claim 1 is characterized in that: the terminal angle of wedge of described hollow needle tubing (1) is 70.3 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200686268U CN201996728U (en) | 2011-03-16 | 2011-03-16 | Single-bend flute needle for use in vitreoretinal surgeries |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200686268U CN201996728U (en) | 2011-03-16 | 2011-03-16 | Single-bend flute needle for use in vitreoretinal surgeries |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201996728U true CN201996728U (en) | 2011-10-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200686268U Expired - Fee Related CN201996728U (en) | 2011-03-16 | 2011-03-16 | Single-bend flute needle for use in vitreoretinal surgeries |
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| CN (1) | CN201996728U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110538022A (en) * | 2019-09-09 | 2019-12-06 | 西安交通大学医学院第一附属医院 | Contralateral bending type flute needle for retinal vitreous surgery |
-
2011
- 2011-03-16 CN CN2011200686268U patent/CN201996728U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110538022A (en) * | 2019-09-09 | 2019-12-06 | 西安交通大学医学院第一附属医院 | Contralateral bending type flute needle for retinal vitreous surgery |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111005 Termination date: 20120316 |