CN110384582A - A kind of air pocket method Deep liminal keratoplasty device and its application method - Google Patents
A kind of air pocket method Deep liminal keratoplasty device and its application method Download PDFInfo
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- CN110384582A CN110384582A CN201910646730.1A CN201910646730A CN110384582A CN 110384582 A CN110384582 A CN 110384582A CN 201910646730 A CN201910646730 A CN 201910646730A CN 110384582 A CN110384582 A CN 110384582A
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F9/00—Methods or devices for treatment of the eyes; Devices for putting-in contact lenses; Devices to correct squinting; Apparatus to guide the blind; Protective devices for the eyes, carried on the body or in the hand
- A61F9/007—Methods or devices for eye surgery
- A61F9/00736—Instruments for removal of intra-ocular material or intra-ocular injection, e.g. cataract instruments
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- Ophthalmology & Optometry (AREA)
- Heart & Thoracic Surgery (AREA)
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Abstract
The present invention relates to medical instruments fields, more specifically, it is related to a kind of air pocket method Deep liminal keratoplasty device and its application method, it aims to solve the problem that in ophthalmologic operation, the halfway problem of corneal ablation, its key points of the technical solution are that: including pedestal, the cutter portion that is threadedly connected to pedestal, be connected to pedestal and with the negative pressure portion of Corneal Contact, be connected to the gas injection separation unit of pedestal.The present invention passes through the design of gas injection separation unit, high-precision gas injection syringe needle can be inserted into cornea, so as to direct gas injection isolated cornea.
Description
Technical field
The present invention relates to medical instruments fields, more specifically, it relates to which a kind of air pocket method Deep liminal keratoplasty fills
It sets and its application method.
Background technique
Deep lamellar keratoplasty (DALK) is a kind of epithelial cell for removing host cornea and hypothallus until rear elastic force
Layer, is implanted into the operation method of respective thickness donor's cornea.
DALK is usually used in the keratoconus of no oedema medical history in clinic and does not involve the corneal scar of descemet's membrane, do not tire out
And entocornea and the malnutrition of endodermis etc..The conventionally employed front layer cornea of separation by hand of DALK reach deep hypothallus or after
Elastic layer.At present using wide hypothallus after being balanced salt solution or adhered elastomer push-in, Selective Separation hypothallus is with after
Elastic layer.
DALK remains descemet's membrane and endothelial layer, and postoperative endothelial cell is lost and the probability of rejection reduces.
However, may will form irregular interface between matrix if corneal stroma does not completely remove in DALK operation, influence postoperative view
There is astigmatism in power.
Summary of the invention
In view of the deficiencies of the prior art, the present invention intends to provide a kind of air pocket method Deep liminal keratoplasty
Gas injection syringe needle high-precision can be inserted into cornea by the design of gas injection separation unit by device and its application method, so as to
Direct gas injection isolated cornea.
Above-mentioned technical purpose of the invention has the technical scheme that a kind of air pocket method furrow pits angle
Film transplantation device, including pedestal, the cutter portion that is threadedly connected to pedestal, be connected to pedestal and with the negative pressure portion of Corneal Contact, even
It is connected to the gas injection separation unit of pedestal.
For pedestal and cornea to link together, cutter portion cuts out the edge of a knife in cutter portion for cutting out the edge of a knife in negative pressure portion
Afterwards, using gas injection separation unit gas injection, this part cornea after enabling to cut out the edge of a knife heaves bubble, and is finally recovered.
The present invention is further arranged to: the hollow setting of pedestal, and inner wall is equipped with driving screw thread, and the cutter portion includes
It is threadedly connected to the tool apron of driving screw thread, drive disk, the coaxially connected circular cutter in tool apron of driving tool apron rotation, wherein tool apron
It is equally in hollow setting, the inner wall of circular cutter is equipped with convenient for the foresight of alignment cornea position to be cut.
Circular cutter is used for cutting corneal, when in use, a label is done on the cornea of position to be cut first, then by foresight
It being aligned with the label, rotate driving disk after alignment, tool apron and circular cutter are mobile towards cornea, until circular cutter touches cornea,
Complete the cutting to cornea.
The present invention is further arranged to: the tool apron is threadedly connected to driving threaded top, and driving bottom of thread screw thread connects
It is connected to the locking screw thread seat set at lock knife seat, the hollow setting of locking screw thread seat, circular cutter passes through lock along locking screw thread seat inner wall
Determine threaded block.
When being cut using circular cutter, although can be aligned with foresight, the ring cutting position to ensure circular cutter is unbiased,
The depth of cut of circular cutter can only just judge that the requirement for operative doctor is very high by the experience of doctor；
Therefore setting locking screw thread seat determines the depth of ring cutting according to the patient's condition before surgery, then adjusts before surgery
Rotation locking threaded block, when the threads turn of tool apron to the screw thread for touching locking screw thread seat, tool apron will be unable to continue to rotate,
The depth of cut of circular cutter is required depth of cut at this time.
The present invention is further arranged to: the base bottom radially offers gas injection channel, and gas injection separation unit includes
It is connected to the syringe needle driving that the support frame of pedestal, the gas injection syringe needle for being connected to support frame, control gas injection syringe needle are moved towards cornea
Portion, the syringe supplied to gas injection syringe needle, wherein support frame radially offers sliding slot along pedestal, and gas injection syringe needle slides along the chute.
After the completion of cutting, due to the design in gas injection channel, gas injection syringe needle is enabled to pass through pedestal, cornea is carried out
Operation, gas injection syringe needle is inserted into cornea, and is supplied by syringe；
When gas injection, gas injection syringe needle is respectively set with syringe, so that the volume of gas injection syringe needle can either be made smaller, and be avoided that by
Interference of the pressure injection emitter to gas injection syringe needle.
The present invention is further arranged to: the gas injection syringe needle driving portion includes the sliding block slided along the chute, is rotated on sliding block
It is connected with the first screw drive set；The second screw drive set is arranged with outside gas injection syringe needle, the first screw drive covers inner wall and second
Screw drive covers the screw thread that outer wall is equipped with cooperation, and the one end in the second thread bush towards gas injection channel is extended with smooth section, and sliding block is opened
Equipped with the through-hole passed through for smooth section.
The outer wall of gas injection syringe needle is connected to the second screw drive set, the spiral shell covered by the second thread bush and the first screw drive
Line cooperation, enables gas injection syringe needle to carry out high-precision movement by screw thread.
The present invention is further arranged to: the smooth section peripheral wall is provided with limiting slot along its length, and sliding block is equipped with embedding
Enter the limited block of limiting slot.
By the cooperation of limiting slot and limited block, gas injection syringe needle is set to be slided along limiting slot, without with first
The threads turn of screw drive set carries out deflection.
The present invention is further arranged to: the negative pressure portion includes the negative pressure chamber for being opened in base bottom surface, is connected to negative pressure
The guide pad of chamber inner wall, the negative-pressure ward syringe for being connected to negative pressure chamber.
In order to ensure depth of cut is accurate enough, therefore, to assure that every time when excision, pedestal is all in sufficient with cornea
Fit-state, once pedestal is not bonded with cornea or error a little in height, with preset depth of cut into
Traveling knife will be cut too deep or excessively shallow, cause bad influence to surgical effect.
The present invention is further arranged to: the pedestal side wall is equipped with finger grip, and finger grip is opposite in the side of pedestal
It is provided with a pair.
Each funtion part is all to connect on the base, and pedestal carries out mobile control entirely through hand-held finger grip, thus
More coordinate with finger position, use is more stable.
A kind of air pocket method Deep liminal keratoplasty device application method,
S1: turning locking screw thread seat, adjusts the latched position of locking screw thread seat；
S2: moving pedestal, and base position is directed at cornea；
S3: negative-pressure ward syringe is used, pedestal is connect with cornea；
S4: turning tool apron, carries out ring cutting to cornea, the position before reaching entocornea；
S5: moving gas injection syringe needle, turns the bottom end that the first screw drive set makes gas injection syringe needle be inserted into corneal ablation；
S6: injection air separates entocornea and corneal stroma, and exposure obtains cornea plant bed.
In conclusion the invention has the following advantages:
First, passing through the design of gas injection separation unit, high-precision gas injection syringe needle can be inserted into cornea, so as to direct gas injection
Isolated cornea；
Second, passing through the cooperation of locking screw thread seat and tool apron, the activation point of tool apron is locked, so that ring cutting when by ring cutting is deep
Degree locking in advance.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the present embodiment；
Fig. 2 is the structural schematic diagram in cutter portion；
Fig. 3 is the top view in cutter portion；
Fig. 4 is negative the structural schematic diagram of splenium；
Fig. 5 is negative the structural schematic diagram of splenium and gas injection separation unit；
Fig. 6 is the portion the A enlarged drawing of Fig. 1.
In figure: 1, pedestal；11, gas injection channel；12, finger grip；2, cutter portion；21, tool apron；22, drive disk；23, ring
Cutter；24, foresight；25, locking screw thread seat；3, negative pressure portion；31, negative pressure chamber；32, negative-pressure ward syringe；33, guide pad；
4, gas injection separation unit；41, support frame；411, sliding slot；412, through slot is supported；413, nut；42, gas injection syringe needle；43, sliding block；44,
First screw drive set；45, the second screw drive set；451, smooth section；452, thread segment；453, limiting slot；46, limited block.
Specific embodiment
With reference to the accompanying drawings and examples, the present invention will be described in detail.
Embodiment one: a kind of air pocket method Deep liminal keratoplasty device, as shown in Figure 1, including pedestal 1, being threadedly coupled
In pedestal 1 cutter portion 2, be connected to pedestal 1 and with the negative pressure portion 3 of Corneal Contact, the gas injection separation unit 4 that is connected to pedestal 1, even
It is connected to the finger grip 12 of 1 side wall of pedestal.At work, negative pressure portion 3 is for linking together pedestal 1 with cornea, cutter portion 2
For cutting out the edge of a knife, after cutter portion 2 cuts out the edge of a knife, using 4 gas injection of gas injection separation unit, make to cut out this part cornea after the edge of a knife
Bubble can be heaved, and is finally recovered.
As shown in Figure 1 and Figure 2, the hollow setting of pedestal 1, and inner wall is equipped with driving screw thread, cutter portion 2 is threadedly engaged with driving,
High-precision movement is carried out under the driving of driving screw thread.Cutter portion 2 include be threadedly connected to driving threaded top tool apron 21,
Drive the drive disk 22 of the rotation of tool apron 21, the locking screw thread seat 25 for being threadedly connected to the driving bottom of thread, across the ring cutting of pedestal 1
Knife 23, wherein circular cutter 23, tool apron 21, locking screw thread seat 25 are in hollow setting.Circular cutter 23 is connected to tool apron 21, and passes through
Pedestal 1, locking screw thread seat 25, doctor is when operating, by rotating tool apron 21, to go up and down circular cutter 23.
As shown in Figure 2 and Figure 3,23 inner wall of circular cutter is additionally provided with cross foresight 24, when in use, first in position to be cut
A label is done on cornea, is then directed at foresight 24 with the label, rotate driving disk 22 after alignment, tool apron 21 is with circular cutter 23
It is mobile towards cornea, until circular cutter 23 is cut into cornea certain depth, complete the cutting to cornea.
When being cut using circular cutter 23, although can be aligned with foresight 24, the ring cutting position to ensure circular cutter 23 is not inclined
Tiltedly, but the real-time depth of cut of circular cutter 23 can only just judge by the experience of doctor, the requirement for operative doctor
It is very high；
Therefore setting locking screw thread seat 25 determines the depth to be cut of circular cutter 23 according to the patient's condition before surgery, then exists
Operation consent adjustment rotation locking threaded block 25, when the threads turn of tool apron 21 to the screw thread for touching locking screw thread seat 25, knife
Seat 21 will be unable to continue to rotate, and the depth of cut of circular cutter 23 is required depth of cut at this time.Locking screw thread seat 25 and knife
Shape, the size of seat 21 are all identical, are also all connected with drive disk 22, and difference is that 21 inner wall of tool apron is connected with circular cutter 23.Ring
In folding process, outer wall is abutted with the inner wall of locking screw thread seat 25 cutter 23 always, so that locking screw thread seat 25 can also play
Increase the effect of 23 stability of circular cutter.
As shown in figure 4, in order to ensure the depth of cut of circular cutter 23 is accurate enough, therefore, to assure that every time when excision, pedestal 1
All sufficient fit-state is in cornea.Once pedestal 1 is not bonded with cornea or mistake a little in height
Difference carries out feed with preset depth of cut, circular cutter 23 will be made to cut too deep or excessively shallow, caused badly to surgical effect
Influence.
Therefore the negative pressure portion 3 directly contacted with cornea is equipped in 1 bottom of pedestal, negative pressure portion 3 includes being opened in 1 bottom surface of pedestal
Negative pressure chamber 31, be connected to negative pressure chamber 31 negative-pressure ward syringe 32(Fig. 1), negative-pressure ward syringe 32 by hose with
Negative pressure chamber 31 connects, and the both ends connection of hose is all sealed using filler such as rubber etc..
Since cornea is in convex, in order to reduce negative pressure to the negative effect of cornea, also for more stable with the abutting of cornea,
It is equipped with guide pad 33 in the inner wall of negative pressure chamber 31, also is provided with chamfering in the contact surface of negative pressure chamber 31 and cornea, so that
The outer wall of negative pressure chamber 31, guide pad 33, negative pressure chamber 31 inner wall three arcuately arrange, form the arc abutted with cornea
Degree.
As shown in Figure 5, Figure 6, circular cutter 23 is only cut into a round cutting trace, in order to incite somebody to action after cutter is cut
The part of cutting is separated with cornea, and gas injection separation unit 4 is also connected on pedestal 1.Gas injection separation unit 4 includes being connected to pedestal
1 gas injection syringe needle 42, the syringe supplied to gas injection syringe needle 42, are equally sealed by hose between syringe and gas injection syringe needle 42
Connection.
Since injection needle is larger, for ease of operation, injection needle is connected to 1 outer wall of pedestal, when need to use
Cornea is operated across pedestal 1.Therefore in 1 bottom of pedestal, gas injection channel 11 is offered along 1 radial direction of pedestal, gas injection is logical
It is not connected between road 11 and negative pressure chamber 31, gas injection syringe needle 42 passes through gas injection channel 11, and realization is contacted with cornea.It should be noted that
, since cornea is in convex, so injection needle is inserted into cornea for the ease of observing, it is often that injection needle is curved
Then injection needle is inserted into cornea by folding in a manner of translation, translation motion can be carried out by the hollow position of circular cutter 23
Observation, so that insertion depth is more accurate.
In order to improve the operation precision of gas injection syringe needle 42, it is also connected with support frame 41 in 1 side wall of pedestal, support frame 41 is along base
Seat 1, which radially extends, offers sliding slot 411, and sliding slot 411 is through slot, runs through support frame 41 along 1 axis direction of pedestal.In sliding slot 411
Two sides be also communicated with the support through slot 412 across support frame 41, sliding block 43,43 two sides of sliding block are slidably connected in sliding slot 411
Equipped with the threaded rod for being pierced by support through slot 412, the traversing through end of threaded rod is threaded with nut 413.So that sliding block 43 was both
It can rotate, and 411 can slide along the chute, after position is selected, the cooperation for passing through nut 413 and threaded rod pushes against support frame
41, realize locking.
The through-hole passed through for gas injection syringe needle 42 is equipped on sliding block 43,42 outer wall of gas injection syringe needle is equipped with the second screw drive set
45, the inner wall of the second screw drive set 45 is arranged in necking, to be interference fitted with gas injection syringe needle 42, abutting links together.
Second screw drive covers 45 one end and is equipped with thread segment 452, remaining position is smooth section 451, smooth section 451 and 43 through-hole of sliding block
Inner wall fitting, to increase the mobile stability of gas injection syringe needle 42,452 external screw thread of thread segment is connected with the first screw drive set 44.
The bottom surface of first screw drive set 44 is rotationally connected with the end face of sliding block 43, so that rotation can only be carried out by being limited.
The inner wall of first screw drive set 44 is equipped with the screw thread with 45 cooperation of the second screw drive set, by rotating the first screw drive set
44, the second screw drive set 45, gas injection syringe needle 42 can be driven to be axially moved together along the through-hole of sliding block 43.
In order to avoid the second screw drive set 45 rotates together with the first screw drive set 44, opened in 451 peripheral wall of smooth section
Equipped with limiting slot 453, limiting slot 453 extends along the axis direction of the second screw drive set 45, and sliding block 43 is set in the inner wall of through-hole
There is the limited block 46 of insertion limiting slot 453,46 shape of limited block and limiting slot 453 cooperate, thus the second screw drive set of locking
45 direction of motion.
A kind of embodiment two: air pocket method Deep liminal keratoplasty device application method, comprising:
S1: turning locking screw thread seat 25, the latched position of locking screw thread seat 25 is adjusted, to lock tool apron 21 and 23 energy of circular cutter
Deep enough depth capacity guarantees that the depth of ring cutting will not be too deep or excessively shallow；
S2: moving pedestal 1, is aligned by cross foresight 24 with the label on cornea, guarantees the cutting position of circular cutter 23
It will not deflection；
S3: using negative-pressure ward syringe 32, will be linked together between pedestal 1 and cornea by negative pressure, to guarantee cutting not
When with cornea, circular cutter 23 is all identical at a distance from cornea；
S4: turning tool apron 21, carries out ring cutting to cornea, cutting reaches the position before entocornea, then reversely turns knife
Seat 21, circular cutter 23 is resetted；
S5: moving gas injection syringe needle 42, turns the bottom end that the first screw drive set 44 makes gas injection syringe needle 42 be inserted into corneal ablation；
S6: injection air separates entocornea and corneal stroma, and exposure obtains cornea plant bed.
The above is only a preferred embodiment of the present invention, protection scope of the present invention is not limited merely to above-mentioned implementation
Example, all technical solutions belonged under thinking of the present invention all belong to the scope of protection of the present invention.It should be pointed out that for the art
Those of ordinary skill for, several improvements and modifications without departing from the principles of the present invention, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (9)
1. a kind of air pocket method Deep liminal keratoplasty device, it is characterised in that: including pedestal (1), be threadedly connected to pedestal (1)
Cutter portion (2), be connected to pedestal (1) and with the negative pressure portion (3) of Corneal Contact, be connected to the gas injection separation unit of pedestal (1)
(4).
2. a kind of air pocket method Deep liminal keratoplasty device according to claim 1, it is characterised in that: the pedestal
(1) hollow setting, and inner wall be equipped with driving screw thread, the cutter portion (2) include be threadedly connected to driving screw thread tool apron (21),
Drive disk (22), the coaxially connected circular cutter (23) in tool apron (21) of tool apron (21) rotation are driven, wherein tool apron (21) is same
In hollow setting, the inner wall of circular cutter (23) is equipped with convenient for the foresight (24) of alignment cornea position to be cut.
3. a kind of air pocket method Deep liminal keratoplasty device according to claim 2, it is characterised in that: the tool apron
(21) it is threadedly connected to driving threaded top, the driving bottom of thread is threaded with the locking screw thread seat of locking tool apron (21) position
(25), locking screw thread seat (25) hollow setting, circular cutter (23) pass through locking screw thread seat (25) along locking screw thread seat (25) inner wall.
4. a kind of air pocket method Deep liminal keratoplasty device according to claim 1, it is characterised in that: the pedestal
(1) bottom radially offers gas injection channel (11), gas injection separation unit (4) include be connected to pedestal (1) support frame (41),
It is connected to the gas injection syringe needle (42) of support frame (41), the syringe needle driving portion that control gas injection syringe needle (42) is moved towards cornea, to note
The syringe of air tube head (42) gas supply, wherein support frame (41) radially offers sliding slot (411), gas injection syringe needle along pedestal (1)
(42) (411) are slided along the chute.
5. a kind of air pocket method Deep liminal keratoplasty device according to claim 4, it is characterised in that: the gas injection needle
Head (42) driving portion includes the sliding block (43) of (411) sliding along the chute, is rotatably connected to the first screw drive set on sliding block (43)
(44)；The second screw drive set (45), the first screw drive set (44) inner wall and the second screw thread are arranged with outside gas injection syringe needle (42)
Actuating sleeve (45) outer wall is equipped with the screw thread of cooperation, and one end of the second thread bush towards gas injection channel (11) is extended with smooth section
(451), sliding block (43) offers the through-hole passed through for smooth section (451).
6. a kind of air pocket method Deep liminal keratoplasty device according to claim 5, it is characterised in that: the smooth section
(451) peripheral wall is provided with limiting slot (453) along its length, and sliding block (43) is equipped with the limited block of insertion limiting slot (453)
(46).
7. a kind of air pocket method Deep liminal keratoplasty device according to claim 1, it is characterised in that: the negative pressure portion
(3) include the negative pressure chamber (31) for being opened in pedestal (1) bottom surface, the guide pad (33) for being connected to negative pressure chamber (31) inner wall, connect
The negative-pressure ward syringe (32) of logical negative pressure chamber (31).
8. a kind of air pocket method Deep liminal keratoplasty device according to claim 1, it is characterised in that: the pedestal
(1) side wall is equipped with finger grip (12), and finger grip (12) is relatively set with a pair in the side of pedestal (1).
9. a kind of air pocket method Deep liminal keratoplasty device application method, it is characterised in that:
S1: turning locking screw thread seat (25), adjusts the latched position of locking screw thread seat (25)；
S2: moving pedestal (1), by pedestal (1) position alignment cornea；
S3: it uses negative-pressure ward syringe (32), pedestal (1) is connect with cornea；
S4: turning tool apron (21), carries out ring cutting to cornea, the position before reaching entocornea；
S5: moving gas injection syringe needle (42), and turning the first screw drive set (44) makes gas injection syringe needle (42) be inserted into corneal ablation
Bottom end；
S6: injection air separates entocornea and corneal stroma, and exposure obtains cornea plant bed.
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| CN112603646A (en) * | 2020-12-21 | 2021-04-06 | 上海昶衡生物科技有限公司 | Suprachoroidal space syringe |
| CN114224603A (en) * | 2022-01-12 | 2022-03-25 | 北京大学人民医院 | Negative pressure marked cornea trephine and operation method thereof |
| CN114224603B (en) * | 2022-01-12 | 2023-06-20 | 北京大学人民医院 | Negative pressure marked cornea trephine and operation method thereof |
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