CN1169500C - Cornea surface layer separating apparatus - Google Patents
Cornea surface layer separating apparatus Download PDFInfo
- Publication number
- CN1169500C CN1169500C CNB011437421A CN01143742A CN1169500C CN 1169500 C CN1169500 C CN 1169500C CN B011437421 A CNB011437421 A CN B011437421A CN 01143742 A CN01143742 A CN 01143742A CN 1169500 C CN1169500 C CN 1169500C
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- Prior art keywords
- negative
- cylindrical shape
- cornea
- surface layer
- separating apparatus
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- Expired - Fee Related
Links
- 210000004087 cornea Anatomy 0.000 title claims abstract description 29
- 239000002344 surface layer Substances 0.000 title claims abstract description 16
- 238000005520 cutting process Methods 0.000 claims abstract description 19
- 210000000981 epithelium Anatomy 0.000 claims abstract description 11
- 229920002379 silicone rubber Polymers 0.000 claims description 7
- 238000004891 communication Methods 0.000 claims description 2
- 210000005252 bulbus oculi Anatomy 0.000 abstract description 6
- 210000001508 eye Anatomy 0.000 abstract description 5
- 210000003560 epithelium corneal Anatomy 0.000 abstract description 4
- 230000004402 high myopia Effects 0.000 abstract description 3
- 238000003754 machining Methods 0.000 abstract description 2
- 229920000260 silastic Polymers 0.000 abstract 2
- 238000001179 sorption measurement Methods 0.000 abstract 1
- 238000001356 surgical procedure Methods 0.000 description 7
- 235000013399 edible fruits Nutrition 0.000 description 5
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 4
- 229920001971 elastomer Polymers 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000004438 eyesight Effects 0.000 description 3
- 229920002529 medical grade silicone Polymers 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 208000001491 myopia Diseases 0.000 description 3
- 230000004075 alteration Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000005304 joining Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 238000002679 ablation Methods 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000001476 alcoholic effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 210000005081 epithelial layer Anatomy 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000003698 laser cutting Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000004379 myopia Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
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- Surgical Instruments (AREA)
- External Artificial Organs (AREA)
Abstract
The present invention relates to a miniature cornea surface layer separating apparatus for ophthalmology, which is especially suitable for a high myopia patient with thin corneal thickness (500 mu m) or a patient who has small eyeballs, deep eye capacity and flat curvature to carry out dioptric correction. The cornea surface layer separating apparatus comprises an epithelium knife (1) and an electric negative-pressure control box (2) which are mutually connected, wherein the epithelium knife is composed of a negative-pressure suction force ring (3) with a handle, an upper cover (4) which has a cutting edge and two diameters, and two medical silastic rings (5), wherein the elastic silastic rings are inlaid on a shoulder (6) which is arranged in the suction force ring to solve the risk that the noncircular horizontal section of the eyeball cornea influences the suction force ring, and the adsorption is unreliable sometimes. The upper cover with a cutting edge is an integral annular cutting knife which is elastically contacted with an SR inner circle spherical surface pressed on the eyeball cornea to limit the position by the precision of precision machining. The depth of an epithelium valve which is cut in a once forming mode is ensured from 60 mu m to 65 mu m, and the separated corneal epithelium valve reserves a valve pedicle which is about 30 degrees.
Description
Technical field
The present invention relates to a kind of ophthalmic medical instrument, particularly the cornea surface layer separating apparatus used of refraction correction surgery.
Background technology
The eyes are the windows of the mind, and in contemporary science and technology develop rapidly and era of knowledge-driven economy, 85% of external information imports in the body by eyes, because the influence of eye vision, many people can't just use eye, bring very big inconvenience to work and life.Wherein, ubiquitous myopia and high myopia are particularly outstanding.China is a near-sighted big country, along with improving constantly of The application of new technique and people's life health level, refractive surgery is surging forward over nearly 20 years, and the previous LASIK Laser in Situ Keratomileusis of introducing (Laser in SituKeratomileusis) has become the most promising representative in the refractive surgery in intermediary and later stages nineteen nineties.But in implementation process, corneal is thin, the darker patient of the near-sighted number of degrees, because the safe clearance deficiency of cornea ablation can only be abandoned operation sometimes, very painful really to this part patient, operative treatment requires the most urgent.Therefore, late nineteen nineties again the someone a kind of new operation method is proposed, shelling edge art (Laser Epithelial Keratomileusis) is called for short LASEK on the laser by name.LASEK opens corneal epithelium to do an epithelial flap, do not injure the bowman's lamina of cornea, this has just created condition for correcting the cutting of wave front aberration individuation, this is that lasik surgery is definitely out of the question, that is to say, people's vision will reach vision above 2.0 to 2.5～3.0 through refractive surgery from now on, can only perform the operation by LASEK and finish.The LASEK operation is used more and more along with the application of laser machine wave front aberration, the carrying out of individuation cutting operation.
Summary of the invention
The improved cornea surface layer separating apparatus that the purpose of this invention is to provide a kind of LASEK of being applicable to modus operandi, its range of operation not only is suitable for all lasik surgery patients to be used, and be more suitable for using, and can improve safety, economy and the stability of cornea flap technology in the thin high myopia patient of cornea.
The objective of the invention is to be achieved through the following technical solutions, a kind of cornea surface layer separating apparatus (claiming the LASEK microkeratome again) is provided, it comprises dermatotome on the electronic negative pressure control chamber and of mutual gas communication, wherein, the described dermatotome of going up comprises: a negative-pressure sucking ring, it comprises an endoporus, be formed on the suction rings sidewall outer surface so that fixedly mount the installing hole of a hollow handle, be formed at an axially extended annular shoulder of suction rings inboard, and be formed at ring-shaped groove between suction rings sidewall and the annular shoulder, that be communicated with installing hole; One band blade loam cake, it comprises a cylindrical shape cutter, the annular lip of radially extending along described cylindrical shape cutter upper end, the lower end of cylindrical shape cutter has the cutting blade of 300 degree arc length and the breach of 60 degree arc length, and sign on the annular lip upper surface, that align with 60 degree breach of cylindrical shape cutter lower end; Described band blade loam cake is installed in rotation on the negative-pressure sucking ring by the endoporus that described cylindrical shape cutter inserts the negative-pressure sucking ring; And a silicon rubber loop, it is removably mounted on negative-pressure sucking ring inboard by rabbeting with the annular shoulder on the negative-pressure sucking ring at annular groove on the one end, that extend vertically.
In described cornea surface layer separating apparatus, the cutting edge two sides of the blade of the cylindrical shape cutter in the described band blade loam cake are 20 degree angles along cylinderical surface, knife height is not less than 0.1mm, be provided with the round Internal Spherical Surface of a SR7.8 from the cutting edge 0.1mm place of blade, the diameter of cylindrical shape cutter is between Φ 8 and Φ 9.
In described cornea surface layer separating apparatus, the thickness of described silicon rubber loop is 0.05mm.
In described cornea surface layer separating apparatus, described negative pressure control chamber is to adopt the battery-driven power driven system of internal electric source, directly drive vacuum epithelium pump by the frequency-variable electronic control loop, the negative pressure of vacuum of generation-(150～200) mmHg, control chamber is provided with moisture trap outward.
Advantage of the present invention is, this dermatotome of going up can carry out a kind of resilient integral cutting by the outermost epithelium of corneal, guarantees that depth of cut can only be at 60～65 μ m, and the sharpness of blade is controlled at and can severs epithelial layer and can not injure bowman's lamina again; Owing to overlapped the medical grade silicon rubber circle of high resilience sealing function at the inner ring shoulder of negative-pressure sucking ring edge, its plasticity is guaranteed that suction rings can be adsorbed on securely and is oval keratoglobus inner edge and corpus ciliare position; In the operation epithelial flap reset easily, level and smooth, no opaque and hypothallus fold phenomenon, safe, cost is low; Because the negative pressure control chamber has used the power driven system of internal battery power supply, no longer need extraneous auxiliary source of the gas (purity nitrogen gas cylinder etc.), realized that the light of refractive surgery apparatus carry.
Brief description of drawings
In order to more clearly understand above and other features and advantages of the present invention, describe a preferred embodiment of the present invention in detail below in conjunction with accompanying drawing, wherein:
Fig. 1 is an axonometric chart of going up the dermatotome broken section;
Fig. 2 is the axonometric chart of negative-pressure sucking ring;
Fig. 3 is the axonometric chart of negative-pressure sucking ring broken section;
Fig. 4 is the axonometric chart of band blade loam cake;
Fig. 5 is the axonometric chart of band blade loam cake broken section;
Fig. 6 is the axonometric chart of silicon rubber loop;
Fig. 7 is the axonometric chart of silicon rubber loop broken section;
Fig. 8 is the outside drawing of negative pressure control chamber; And
Fig. 9 is the fundamental diagram of cornea surface layer separating apparatus.
The specific embodiment
Cornea surface layer separating apparatus of the present invention comprises last dermatotome 1 as shown in Figure 1, comprises negative-pressure sucking ring 3, band blade loam cake 4 and medical grade silicon rubber circle 5 and go up dermatotome 1.Last dermatotome 1 is connected with a negative pressure control chamber by a vacuum handle 12.
Shown in Fig. 2 and 3, negative-pressure sucking ring 3 adopts medical metal or nonmetallic materials to make, and smooth surface is fluent, is convenient to be adsorbed on the cornea inner edge and the corpus ciliare position of eyeball.Negative-pressure sucking ring 3 comprises an endoporus 11, be formed at the installing hole 18 on the suction rings sidewall outer surface, be formed at an axially extended annular shoulder 6 of suction rings 3 inboards, and be formed at ring-shaped groove 10 between suction rings sidewall and the annular shoulder 6, that be communicated with installing hole 18.One end of hollow handle 12 is fixedly mounted on 18 li of installing holes by interference fit, and the other end of hollow handle 12 is connected with the vacuum interface of a negative pressure control chamber by the flexible pipe (not shown).
Shown in Figure 4 and 5, band blade loam cake 4 is special annular cutter of making the epithelial flap base of a fruit.It comprises a cylindrical shape cutter 30, the annular lip 31 of radially extending along cylindrical shape cutter 30 upper ends, the lower end of cylindrical shape cutter 30 has the cutting blade 7 of 300 degree arc length and the breach 8 of 60 degree arc length, and sign 9 on annular lip 31 upper surfaces, that align with 60 degree breach 8 of cylindrical shape cutter 30 lower ends.The surface roughness of cutting blade 7 is not more than 0.2 μ m, the cutting edge two sides are 20 degree angles along cylinderical surface, knife height is not less than 0.1mm, is provided with the round Internal Spherical Surface of a SR7.8 from the cutting edge 0.1mm place of blade (7), and the diameter of cylindrical shape cutter (30) is between Φ 8 and Φ 9.Band blade loam cake 4 is installed in rotation on the negative-pressure sucking ring 3 by the endoporus 11 that described cylindrical shape cutter 30 inserts negative-pressure sucking ring 3 with the interference fits of H10/h8.
Shown in Fig. 6 and 7, silicon rubber loop 5 is removably mounted on negative-pressure sucking ring 3 inboards by rabbeting with the annular shoulder 6 on the negative-pressure sucking ring 3 at annular groove 26 on the one end, that extend vertically.The thickness of medical grade silicon rubber circle 5 is 0.05mm, and it is whippy high plasticity material, and it is non-circular and influence suction rings and adsorb insecure problem sometimes to solve cornea horizontal cross-section that cornea curvature brings.
The dermatotome 1 of going up of the present invention both can be connected with general negative pressure control chamber by handle 12 and flexible pipe, also can be connected with negative pressure control chamber provided by the invention.
Shown in Fig. 8 and 9, negative pressure control chamber 2 provided by the invention comprises a housing 32; One accumulator 13, a frequency-variable electronic control loop 14 and a miniature vacuum epithelium pump 15 in housing 32, that connect successively; A voltmeter 19, a negative pressure of vacuum table 20 and a vacuum interface 16 on housing 32 panels, wherein, vacuum interface 16 is connected with miniature vacuum epithelium pump 15, voltmeter 19 is connected between accumulator 13 and the frequency-variable electronic control loop 14, and negative pressure of vacuum table 20 is connected between miniature vacuum epithelium pump 15 and the vacuum interface 16; Accumulator 13 can be charged by charger 23 and charger interface 21, and frequency-variable electronic control loop 14 can be controlled with regard to foot switch interface 22 by foot switch 24.In addition, also can be provided with in hull outside-moisture trap 17.Negative pressure control chamber 2 is the power driven systems that adopt 13 power supplies of internal electric source accumulator, directly drives vacuum epithelium pump 15 by frequency-variable electronic control loop 14, thereby produces the negative pressure of vacuum of one (150～200) mmHg.
Operation principle of the present invention is, surgical doctor is the band blade loam cake 4 of selected a kind of specification as required, be inserted in 11 li of the endoporus of the suction rings 3 that is absorbed and fixed at the cornea inner edge, utilize sign 9 to determine to stay the lobe position, inject the ethanol liquid of fresh 20% concentration of now joining, the cornea that overflow soaked 30 seconds, will be with blade loam cake 4 respectively to rotate about 15 degree with counter clockwise direction along clockwise direction simultaneously, kept 30 degree and made the lobe base of a fruit.The depth of cut of blade has Precision Machining height tolerance and the SR ball inner surface elasticity that is predefined on the cornea to guarantee to proofread and correct at 60 μ m～65 μ m (corrected value) fully, need not worry the bowman's lamina damage of cornea.But 30 seconds alcohol-pickled time must be grasped at ethanol liquid and can connect power with absent-mindedness absorption between the two before entering lamina elastica corneae anterior from cutting ring, and control is done evenly wet.Reuse hook, scraper, take off conventional ophthalmic operating set such as son and peel off epithelium, stay the epithelial flap bases of a fruit of about 30 degree, take off suction rings 3.Change the suction rings beat laser 30 degree in addition, fixedly eyeball carries out the laser cutting bowman's lamina becomes requirement with hypothallus curvature under-200mmHg negative pressure.
The important technological parameters of the foregoing description is:
1. corneal epithelium depth of cut 60 μ m～65 μ m (corrected value)
2. corneal epithelium cutting diameter Φ 8 or Φ 9
3. the corneal epithelial flap base of a fruit should keep the epithelial flap base of a fruit of about 30 degree
4. fixing eyeball negative pressure-(150～200) mmHg of suction rings
5. soaked about 30 seconds with fresh 20% alcoholic solution of now joining in the soak time cutting
Claims (4)
1. cornea surface layer separating apparatus comprises dermatotome (1) on the electronic negative pressure control chamber (2) and of mutual gas communication, it is characterized in that the described dermatotome (1) of going up comprising:
One negative-pressure sucking ring (3), it comprises an endoporus (11), be formed on the suction rings sidewall outer surface so that fixedly mount the installing hole (18) of a hollow handle (12), be formed at an axially extended annular shoulder (6) of suction rings inboard, and be formed at ring-shaped groove (10) between suction rings sidewall and the annular shoulder (6), that be communicated with installing hole (18);
One band blade loam cake (4), it comprises a cylindrical shape cutter (30), the annular lip (31) of radially extending along described cylindrical shape cutter (30) upper end, the lower end of cylindrical shape cutter (30) has the cutting blade (7) of 300 degree arc length and the breach (8) of 60 degree arc length, and sign (9) on annular lip (31) upper surface, that align with 60 degree breach (8) of cylindrical shape cutter (30) lower end; Described band blade loam cake (4) is installed in rotation on the negative-pressure sucking ring (3) by the endoporus (11) that described cylindrical shape cutter (30) inserts negative-pressure sucking ring (3); And
One silicon rubber loop (5), it is removably mounted on negative-pressure sucking ring (3) inboard by rabbeting with the annular shoulder (6) on the negative-pressure sucking ring (3) at annular groove (26) on the one end, that extend vertically.
2. cornea surface layer separating apparatus as claimed in claim 1, it is characterized in that, the cutting edge two sides of the blade (7) of the cylindrical shape cutter (30) in the described band blade loam cake (4) are 20 degree angles along cylinderical surface, knife height is not less than 0.1mm, be provided with the round Internal Spherical Surface of a SR7.8 from the cutting edge 0.1mm place of blade (7), the diameter of cylindrical shape cutter (30) is between Φ 8 and Φ 9.
3. cornea surface layer separating apparatus as claimed in claim 1 is characterized in that, the thickness of described silicon rubber loop (5) is 0.05mm.
4. cornea surface layer separating apparatus as claimed in claim 1, it is characterized in that, described negative pressure control chamber (2) is the power driven system that adopts internal electric source accumulator (13) power supply, directly drive vacuum epithelium pump (15) by frequency-variable electronic control loop (14), the negative pressure of vacuum of generation-(150～200) mmHg, the outer moisture trap (17) that is provided with of control chamber (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011437421A CN1169500C (en) | 2001-12-17 | 2001-12-17 | Cornea surface layer separating apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011437421A CN1169500C (en) | 2001-12-17 | 2001-12-17 | Cornea surface layer separating apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1426767A CN1426767A (en) | 2003-07-02 |
| CN1169500C true CN1169500C (en) | 2004-10-06 |
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ID=4677240
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB011437421A Expired - Fee Related CN1169500C (en) | 2001-12-17 | 2001-12-17 | Cornea surface layer separating apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1169500C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2705138Y (en) * | 2004-05-26 | 2005-06-22 | 无锡市康明医疗器械有限公司 | Automatic eye corneal epithelium separator |
| EP2656824A3 (en) * | 2008-05-15 | 2014-04-02 | Mynosys Cellular Devices, Inc. | Ophthalmic surgical device for capsulotomy |
| CN106726118B (en) * | 2016-11-21 | 2023-03-14 | 南京市第一医院 | Instrument for taking donor cornea implant |
| CN107028700B (en) * | 2017-04-05 | 2020-02-18 | 青岛大学附属医院 | Corneal Epithelial Flap Shaper |
| CN108186194A (en) * | 2018-01-03 | 2018-06-22 | 沈阳何氏眼科医院有限公司 | Ophthalmologic operation ultrasound knife |
| 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 |
-
2001
- 2001-12-17 CN CNB011437421A patent/CN1169500C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN1426767A (en) | 2003-07-02 |
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