CN202821802U - Corneal trephine - Google Patents
Corneal trephine Download PDFInfo
- Publication number
- CN202821802U CN202821802U CN 201220442879 CN201220442879U CN202821802U CN 202821802 U CN202821802 U CN 202821802U CN 201220442879 CN201220442879 CN 201220442879 CN 201220442879 U CN201220442879 U CN 201220442879U CN 202821802 U CN202821802 U CN 202821802U
- Authority
- CN
- China
- Prior art keywords
- tumbler
- corneal
- base
- corneal trephine
- trephine
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Prostheses (AREA)
Abstract
The utility model provides a corneal trephine which comprises a Y-shaped handle, a foundation, a rotating member and a cutting head. The Y-shaped handle comprises a hand-hold portion and a pair of fork fingers. The foundation is in a shape of a hollow circular cylinder. The outer side face of the foundation is combined with the pair of fork fingers of the Y-shaped handle, and the foundation is enabled to rotate by using a connecting line of finger tips of the pair of the fork fingers as an axis. The rotating member is in the shape of the hollow circular cylinder. The upper end of the rotating member is provided with an extending portion which extends outwards and transversely. The rotating member is rotatably inserted in the foundation. The extending portion of the upper end of the rotating member is supported on an upper end portion of the foundation. The cutting head is fixed at the lower end of the rotating member, and the cutting head exposes out of the lower end face of the foundation by a preset height. When the corneal trephine is used in a corneal transplantation operation, the corneal trephine is capable of being easily fixed on a cornea of a patient in a fastening mode, and is prevented from shifting or being off, a doctor can easily exert appropriate pressure on the corneal trephine and ensures the maximum depth of cutting feed, and therefore the operation is enabled to be safe and accurate.
Description
Technical field
This utility model relates to the surgical clinical medical apparatus and instruments, specifically, relates to a kind of corneal trephine.
Background technology
The blinding keratopathy becomes the world today's three large blinding oculopathy with diabetic retinopathy, glaucoma.The blinding keratopathy is many by due to infected keratitis, cerneal dystrophy, corneal degeneration or the cornea wound.The unique method that at present, blinding keratopathy patient is recovered lost eyesight is to carry out corneal graft.According to statistics, China has more than 150 ten thousand blinding keratopathy patients now, but because the source of cornea donor is very limited, the patient that can accept corneal graft every year only has about 10,000.Therefore, improve cornea donor survival rate, to improve corneal graft, reduce post-operative complication in the art be vital for the success of corneal graft.
In corneal graft, be operation the most key in the whole operation with the process of corneal trephine ring cutting patient cornea.Fig. 1 is the schematic perspective view of ring cutting patient cornea in the corneal graft, and Fig. 2 is the generalized section of ring cutting patient cornea in the corneal graft.As depicted in figs. 1 and 2, eyeball is made of wall of eyeball and eyeball content, and the outermost layer of wall of eyeball is made of cornea 1 and sclera 2, and wherein, front 1/6 is transparent cornea 1, and rear 5/6 is milky sclera 2.The rear of cornea 1 is iris 3 and crystalline lens 4, has formed anterior chamber 5 between cornea 1 and iris 3, has been full of aqueous humor among the anterior chamber 5.In corneal graft, at first to carry out with 6 couples of patients' of corneal trephine cornea 1 the ring cutting excision, and then normal cornea donor is transplanted on patient's the eyeball.
Fig. 3 shows the side view of a kind of corneal trephine of present use.As shown in Figure 3, the structure of existing corneal trephine 6 is fairly simple, comprises body 7 and cutter section 8, wherein, body 7 is hollow cylindrical, and cutter section 8 is also approximate to be hollow cylindrical, but the thickness of its post jamb reduces from top to bottom gradually and form bottom the edge of a knife that can carry out ring cutting at post jamb.The upper end of the lower end of body 7 and cutter section 8 is fixed together, and the central axes of the central axis of body 7 and cutter section 8.
When using 6 pairs of patient's corneas of existing corneal trephine to carry out ring cutting, the edge of a knife with corneal trephine 6 places on patient's cornea first, then use the upper end of the body 7 of a have gentle hands light press corneal trephine 6, contact the lateral surface of body 7 with the another hands with rotation corneal trephine 6, thereby make corneal trephine 6 cut patient's cornea.From top description as can be known, when using this corneal trephine 6, by pressing the upper end of the hollow cylindrical body 7 of corneal trephine 6 to fix corneal trephine 6 with light finger.If finger pressure is large, finger was just large with the friction of body 7 when body 7 rotated so, thereby the rotation of body 7 is difficult for, if and finger pressure is little, the feed of cutter section 8 is just slow so, therefore, in operation, need regularly to regulate the pressure of finger, like this, not finger corneal trepan 6 fixing just very not firm, and also it is wayward to be applied to size and the uniformity of the pressure on the corneal trephine 6.This just usually cause corneal trephine 6 on patient's cornea displacement in addition come off, and the ring cutting degree of depth and the ring cutting uniformity of very difficult control corneal trephine 6, to such an extent as to it is suddenly local or integrally penetrate patient's cornea and damage iris and crystalline lens the edge of a knife to occur easily, for operation brings complication in the art.
Also has another kind of corneal trephine.This corneal trephine utilizes negative-pressure suction ring to be fixed on patient's cornea, and rotates corneal trephine by hands and excise patient's cornea.Although this corneal trephine utilizes negative-pressure suction ring to be fixed on patient's cornea, and can come by the rotational angle of this corneal trephine ring cutting-in degree, but its disadvantage is complicated operation, disposable use and expensive, has greatly increased patient's financial burden.
The utility model content
The purpose of this utility model is to provide a kind of corneal trephine, so that when using this corneal trephine to carry out corneal graft, can easily and securely this corneal trephine be fixed on patient's the cornea to avoid this corneal trephine displacement in art, to occur or to break away from, can be easily apply suitable pressure and guarantee the depth capacity of feed at this corneal trephine, thereby make more safety and accurately of operation.
To achieve these goals, this utility model provides a kind of corneal trephine, and this corneal trephine comprises: Y type handle, and this Y type handle comprises Handheld Division and a pair of interdigital; Base, this base is hollow cylindrical, and a pair of interdigital combination of its lateral surface and described Y type handle is so that this base can described a pair of interdigital finger tip line be that axle rotates; Tumbler, this tumbler is hollow cylindrical, and its upper end is formed with the extension of horizontal extension, and this tumbler is inserted in the described base rotationally, and the extension of this tumbler upper end is supported on the upper end of described base; And cutter head, this cutter head is fixed on the lower end of described tumbler, and this cutter head exposes the predetermined height in described base lower surface.
In addition, the upper surface at the extension of described tumbler can also be provided with turning handle.
Preferably, the lower surface of the extension of the upper end of described base or described tumbler can be formed with annular groove.In one embodiment, the upper end of described base is formed with annular groove, and the lower surface of the extension of described tumbler is formed with annular protrusion, and described annular protrusion embeds in the described annular groove.In another embodiment, the lower surface of the extension of described tumbler is formed with annular groove, and the upper end of described base is formed with annular protrusion, and described annular protrusion embeds in the described annular groove.
The internal groove side wall of above-mentioned annular groove can have different height with external groove sidevall.
According to top narration and the practice as can be known, when using corneal trephine described in the utility model to carry out corneal graft, with a Handheld Division that holds the Y type handle of this corneal trephine, thereby this corneal trephine cutter head is fixed on patient's the cornea down, rotate the tumbler of this corneal trephine with another hands (passing through turning handle), thereby the cutter head of this corneal trephine is rotated, so that with patient's corneal ablation.Owing to hold this corneal trephine by handle, and again because the base of this corneal trephine can rotate around the interdigital finger tip line of handle, therefore, the lower surface of the base of this corneal trephine can be close to automatically on the cornea of slightly heaving.Like this, in whole operation, just be easy to be fixed on this corneal trephine on patient's the cornea and avoid this corneal trephine displacement in art, to occur or break away from.In addition, in the feed process, rotate tumbler by turning handle, therefore be easy to apply suitable pressure at tumbler, particularly, because exposing the maximum height of base lower surface, is scheduled to cutter head, therefore, can accurately control the depth capacity of feed, thereby make more safety and accurate of operation.
In corneal trephine described in the utility model, between the lower surface of the extension of the upper end of base and tumbler, in conjunction with design, so that the contact area between tumbler and the base reduces, thereby the frictional force between tumbler and the base is reduced by concavo-convex.This facilitates tumbler with respect to the rotation of base, thereby can more easily control the feed process.
Description of drawings
Fig. 1 is the schematic perspective view of ring cutting patient cornea in the corneal graft;
Fig. 2 is the generalized section of ring cutting patient cornea in the corneal graft;
Fig. 3 shows the side view of a kind of corneal trephine of present use;
Fig. 4 shows the perspective view of a described corneal trephine of embodiment of the present utility model;
Fig. 5 shows the perspective view of the Y type handle in the described corneal trephine of embodiment of the present utility model;
Fig. 6 shows a three-dimensional cutaway view of base, tumbler and cutter head assembly in the described corneal trephine of embodiment of the present utility model;
Fig. 7 shows another three-dimensional cutaway view of base, tumbler and cutter head assembly in the described corneal trephine of embodiment of the present utility model; And
Fig. 8 shows the stereo decomposing cutaway view of base, tumbler and cutter head assembly in the described corneal trephine of embodiment of the present utility model.
Wherein, Reference numeral is:
1, cornea; 2, sclera; 3, iris; 4, crystalline lens; 5, anterior chamber;
6, existing corneal trephine; 7, body; 8, cutter section;
100, corneal trephine of the present utility model;
10, Y type hands handle; 11, Handheld Division; 12, interdigital;
20, base; 22, annular groove; 22a, internal groove side wall; 22b, external groove sidevall;
30, tumbler; 31, extension; 32, annular protrusion; 33, turning handle;
40, cutter head.
The specific embodiment
The embodiment of corneal trephine described in the utility model is described below with reference to the accompanying drawings.Obviously, in the situation that does not depart from spirit and scope of the present utility model, can revise described embodiment with various mode.Therefore, accompanying drawing is illustrative with being described in essence, rather than is used for the protection domain of restriction claim.In addition, in this manual, accompanying drawing draws not in scale.
Fig. 4 shows the perspective view of a described corneal trephine of embodiment of the present utility model, Fig. 5 shows the perspective view of the Y type handle in this corneal trephine, Fig. 6 and Fig. 7 show the three-dimensional cutaway view of base, tumbler and cutter head assembly this corneal trephine from different angles, and Fig. 8 shows the stereo decomposing cutaway view of base, tumbler and cutter head assembly in this corneal trephine.Referring to Fig. 4-Fig. 8, the described corneal trephine 100 of an embodiment of the present utility model comprises Y type handle 10, base 20, tumbler 30 and cutter head 40.
As shown in Figure 5, Y type handle 10 comprises Handheld Division 11 and a pair of interdigital 12.
Shown in Fig. 6-8, base 20 is hollow cylindrical, and a pair of interdigital 12 combinations of its lateral surface and Y type handle 10 are so that base 20 can described a pair of interdigital 12 finger tip line be that axle rotates.Specifically, in the present embodiment, the lateral surface of base 20 is formed with a pair of transverse process, and this a pair of transverse process inserts respectively in the cavity of a pair of interdigital 12 finger tip of Y type handle 10, thereby base 20 can rotate with respect to a pair of interdigital 12 of Y type handle 10.In other embodiments, also can be, the lateral surface of base 20 be formed with a pair of cavity, and a pair of interdigital 12 finger tip of Y type handle 10 is formed with a pair of transverse process, thereby a pair of interdigital 12 of Y type handle 10 is combined with the lateral surface of base 20.
Tumbler 30 is hollow cylindrical, and its upper end is formed with the extension 31 of horizontal extension.Tumbler 30 is inserted in the base 20 rotationally, and the extension 31 of tumbler 30 upper ends is supported on the upper end of base 20.Cutter head 40 is fixed on the lower end of tumbler 30, and as shown in Figure 7, cutter head 40 exposes the predetermined height in base 20 lower surfaces.In addition, for rotate tumbler 30 convenient for the purpose of, can turning handle 33 be set at the upper surface of the extension 31 of tumbler 30.
When rotating in order to reduce tumbler 30 and the frictional force between the base 20, can reduce the contact area between the upper end of the extension 31 of tumbler 30 and base 20.For this reason, shown in Fig. 6-8, can form annular groove 22 in the upper end of base 20.For the contact area between the upper end of the extension 31 that further reduces tumbler 30 and base 20, the internal groove side wall 22a of above-mentioned annular groove 22 can have different height with external groove sidevall 22b, so that only have a cell wall to contact with the lower surface of the extension 31 of tumbler 30 among internal groove side wall 22a and the external groove sidevall 22b.Preferably, the lower surface of the extension 31 of tumbler 30 can be formed with annular protrusion 32, and annular protrusion 32 embeds in the described annular groove 22, but the best bottom land of contact ring connected in star 22 not of annular protrusion 32.The combination of annular protrusion 32 and annular groove 22 not only can stiffener rings connected in star 22 structure, and can make tumbler 30 more firm with the combination of base 20, but do not increase frictional force between the two.
In other embodiments, also can be, the lower surface of the extension of described tumbler be formed with annular groove.Further, the internal groove side wall of this annular groove can have different height with external groove sidevall.In addition, the upper end of described base can also be formed with annular protrusion, and described annular protrusion embeds in the described annular groove.It is of equal value that structure in this structure configuration and the present embodiment is configured on the effect.
Using method and the advantage thereof of corneal trephine described in the utility model are described below in conjunction with Fig. 4-Fig. 8.
When using corneal trephine 100 described in the utility model to carry out corneal graft, with a Handheld Division 11 that holds the Y type handle 10 of corneal trephine 100, thereby corneal trephine 100 cutter heads are fixed on patient's the cornea down, rotate the tumbler 30 of corneal trephine 100 by turning handle 33 with the another hands, thereby the cutter head 40 of corneal trephine 100 is rotated, so that with patient's corneal ablation.
Owing to hold corneal trephine 100 by handle 10, and again because the base 20 of corneal trephine 100 can be around the finger tip line rotation of handle interdigital 12, therefore, the lower surface of the base 20 of corneal trephine 100 can automatically be close on the cornea of slightly heaving.Like this, in whole operation, just be easy to be fixed on corneal trephine 100 on patient's the cornea and avoid corneal trephine 100 displacement in art, to occur or break away from.In addition, when corneal trephine 100 had just placed on patient's cornea, because tumbler 30 is movable with respect to base 20, therefore, cutter head 40 upwards was retracted in the cavity of base 20.In the feed process, rotate tumbler 30 and apply downward pressure to tumbler 30 by turning handle 33.Therefore be easy to the lower surface that applies suitable pressure and make cutter head 40 expose gradually base 20 at tumbler 30, in order to patient's cornea is cut.Be scheduled to because cutter head 40 exposes the maximum height of base 20 lower surfaces, therefore, can accurately control the depth capacity of feed, prevent that cutter head 40 from penetrating suddenly patient's cornea and damaging iris and crystalline lens, thereby make more safety and accurate of operation.
In corneal trephine described in the utility model, between the lower surface of the extension 31 of the upper end of base 20 and tumbler 30, in conjunction with design, so that the contact area between tumbler 30 and the base 20 reduces, thereby the frictional force between tumbler 30 and the base 20 is reduced by concavo-convex.This facilitates tumbler 30 with respect to the rotation of base 20, thereby can more easily control the feed process.
For the corneal trephine that above-mentioned this utility model proposes, can also make various improvement on the basis that does not break away from this utility model content.Therefore, protection domain of the present utility model should be determined by the content of appending claims.
Claims (6)
1. a corneal trephine is characterized in that, comprising:
Y type handle, this Y type handle comprises Handheld Division and a pair of interdigital;
Base, this base is hollow cylindrical, and a pair of interdigital combination of its lateral surface and described Y type handle is so that this base can described a pair of interdigital finger tip line be that axle rotates;
Tumbler, this tumbler is hollow cylindrical, and its upper end is formed with the extension of horizontal extension, and this tumbler is inserted in the described base rotationally, and the extension of this tumbler upper end is supported on the upper end of described base; And
Cutter head, this cutter head is fixed on the lower end of described tumbler, and this cutter head exposes the predetermined height in described base lower surface.
2. corneal trephine as claimed in claim 1 is characterized in that,
Upper surface at the extension of described tumbler is provided with turning handle.
3. corneal trephine as claimed in claim 1 is characterized in that,
The lower surface of the upper end of described base or the extension of described tumbler is formed with annular groove.
4. corneal trephine as claimed in claim 3 is characterized in that,
The upper end of described base is formed with annular groove, and the lower surface of the extension of described tumbler is formed with annular protrusion, and described annular protrusion embeds in the described annular groove.
5. corneal trephine as claimed in claim 3 is characterized in that,
The lower surface of the extension of described tumbler is formed with annular groove, and the upper end of described base is formed with annular protrusion, and described annular protrusion embeds in the described annular groove.
6. such as the described corneal trephine of arbitrary claim among the claim 3-5, it is characterized in that,
The internal groove side wall of described annular groove has different height with external groove sidevall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220442879 CN202821802U (en) | 2012-08-31 | 2012-08-31 | Corneal trephine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220442879 CN202821802U (en) | 2012-08-31 | 2012-08-31 | Corneal trephine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202821802U true CN202821802U (en) | 2013-03-27 |
Family
ID=47933615
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220442879 Expired - Fee Related CN202821802U (en) | 2012-08-31 | 2012-08-31 | Corneal trephine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202821802U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102836032A (en) * | 2012-08-31 | 2012-12-26 | 北京大学第三医院 | Corneal trephine |
| CN104720970A (en) * | 2015-04-03 | 2015-06-24 | 苏州贝尔一锋医疗器械有限公司 | Semicircle rotation type ophthalmostat |
| CN108186194A (en) * | 2018-01-03 | 2018-06-22 | 沈阳何氏眼科医院有限公司 | Ophthalmologic operation ultrasound knife |
| CN117122468A (en) * | 2023-08-14 | 2023-11-28 | 济南市明水眼科医院股份有限公司 | Cornea stroma lens ring producer |
-
2012
- 2012-08-31 CN CN 201220442879 patent/CN202821802U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102836032A (en) * | 2012-08-31 | 2012-12-26 | 北京大学第三医院 | Corneal trephine |
| CN104720970A (en) * | 2015-04-03 | 2015-06-24 | 苏州贝尔一锋医疗器械有限公司 | Semicircle rotation type ophthalmostat |
| CN108186194A (en) * | 2018-01-03 | 2018-06-22 | 沈阳何氏眼科医院有限公司 | Ophthalmologic operation ultrasound knife |
| CN117122468A (en) * | 2023-08-14 | 2023-11-28 | 济南市明水眼科医院股份有限公司 | Cornea stroma lens ring producer |
| CN117122468B (en) * | 2023-08-14 | 2024-04-09 | 济南市明水眼科医院股份有限公司 | Cornea stroma lens ring producer |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202821802U (en) | Corneal trephine | |
| CN102836032A (en) | Corneal trephine | |
| CN102846429B (en) | Fixed intelligent corneal trephine | |
| CN202821803U (en) | Corneal trephine | |
| CN218279950U (en) | Fixed depth cornea mark trephine | |
| CN209422228U (en) | A kind of sclera tunnel knife | |
| EA029263B1 (en) | Scleral incision template and special blade-knife for eye surgery | |
| CN201996726U (en) | Ophthalmic surgery film capable of being torn off step by step | |
| CN114869589A (en) | Fixed depth cornea mark trephine | |
| CN211067384U (en) | Puncture knife with mark for ophthalmologic operation | |
| CN106420161A (en) | Multifunctional alcohol storage tank for PRK | |
| CN208958493U (en) | Ophthalmic cornea metaplax layer removes instrument | |
| CN210521189U (en) | Eyeball sclera marking tool | |
| CN110368186A (en) | A kind of guidance needle and its external member for intraocularly suturing | |
| CN209404886U (en) | Take bolt micropin | |
| CN208582551U (en) | A kind of lamellar cornea separator | |
| CN218784483U (en) | Novel special main incision puncture knife for ophthalmologic cataract surgery | |
| CN105520807B (en) | A kind of anterior chamber eyelid retractor used in penetrating keratoplasty | |
| CN206443816U (en) | A kind of multifunctional alcohol storage tank performed the operation for PRK | |
| CN111568637A (en) | Corneal endothelium transplantation donor manufacturing knife | |
| CN221556290U (en) | Donor eye cornea circular cutting device with negative pressure suction disc structure | |
| CN221866259U (en) | Adjustable cyst membrane decompression nail of expansion period cataract | |
| CN218279949U (en) | Simple fixed depth cornea trephine | |
| CN201055466Y (en) | Novel cataract capsulectomy knife | |
| CN2579388Y (en) | Corneal epithelium valve forming device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130327 Termination date: 20160831 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |