CN112587300B - Vitreous cutting head for cutting vitreous body of eye tissue - Google Patents

Vitreous cutting head for cutting vitreous body of eye tissue Download PDF

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Publication number
CN112587300B
CN112587300B CN202011571775.6A CN202011571775A CN112587300B CN 112587300 B CN112587300 B CN 112587300B CN 202011571775 A CN202011571775 A CN 202011571775A CN 112587300 B CN112587300 B CN 112587300B
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cutting
pipe
shaped base
base body
negative pressure
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CN112587300A (en
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王晓辉
潘丽
刘董
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Luoyang Jiaze Medical Technology Co ltd
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First Affiliated Hospital of Henan University of Science and Technology
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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
    • 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
    • A61F9/00763—Instruments for removal of intra-ocular material or intra-ocular injection, e.g. cataract instruments with rotating or reciprocating cutting elements, e.g. concentric cutting needles

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  • Health & Medical Sciences (AREA)
  • Ophthalmology & Optometry (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Surgical Instruments (AREA)

Abstract

A glass cutting head for cutting an eye tissue vitreous body is characterized in that two ends of a tube body are respectively provided with a connecting part and a cutting liquid suction part, the cutting head of the cutting liquid suction part comprises a round table-shaped base body with the diameter gradually increasing from the top to the bottom, the bottom of the base body is provided with a cutting assembly, the cutting assembly is provided with a plurality of cutting wire structures horizontally protruding out of the side face of the round table-shaped base body, each cutting wire mechanism comprises arc-shaped cutting wires which are positioned in the same vertical plane but have different radians, and the arc-shaped cutting wires are connected into a whole through a plurality of linear cutting wires; the negative pressure liquid suction channel is arranged in the circular truncated cone-shaped base body, the bottom opening of the negative pressure liquid suction channel is positioned on the side face of the circular truncated cone-shaped base body and is higher than the cutting assembly, and the top opening of the negative pressure liquid suction channel is connected with a negative pressure liquid suction pipe penetrating through the pipe body. The structure for sucking the vitreous humor by the lower cutting part and the upper cutting part solves the problem that the pathological vitreous humor is difficult to suck, and has smoother liquid suction process and higher efficiency.

Description

Glass cutting head for cutting vitreous body of eye tissue
Technical Field
The invention relates to a vitreous humor resection instrument in an ophthalmic operation, in particular to a vitreous cutting head for cutting an ocular tissue vitreous humor.
Background
The vitreous body is a semisolid gelatinous substance in the eye and is filled in a vitreous cavity. Normally, the vitreous has good light transmission to allow the retina to adhere to the choroid. If the vitreous body is diseased, a light person feels that mosquitoes fly in front of eyes when seeing the vitreous body, a heavy person can completely shield light rays to lose sight, and peripheral tissue diseases such as retinal detachment and the like can be caused, so that the whole eyeball is damaged.
The basic functions of vitrectomy are to remove turbid vitreous or to remove vitreoretinal traction, restore clear refractive interstitium and promote retinal replacement, and to treat vitreoretinal disease to restore visual function to the patient.
The cutting head used by the existing vitreous cutter generally cuts off and sucks away the vitreous body by utilizing the relative motion of the inner tube and the outer tube, and a vitreous body fluid suction inlet of the cutting head with the structure is generally arranged on the side surface of the outer tube, so that the damage to the eye nerve when the vitreous body is sucked by negative pressure can be effectively reduced, but the cutting efficiency is very low because the cutting head cuts by the relative motion of the inner tube and the outer tube after the vitreous body is sucked; and the diseased vitreous body is easy to generate lens nucleus and is also easy to be tightly combined with tissues such as organic membrane, blood clot and the like, so that the lens nucleus is difficult to be sucked into the lumen.
Disclosure of Invention
In order to solve the problem that the existing vitreous body cutting head is difficult to suck the pathological vitreous body due to the fact that the suction hole is formed in the side face, the invention provides the vitreous body cutting head for cutting the ocular tissue vitreous body.
The technical scheme adopted by the invention for solving the technical problems is as follows: a glass cutter head for cutting eye tissue vitreous bodies comprises a pipe body, wherein two ends of the pipe body are respectively provided with a connecting part and a cutting liquid suction part, after the connecting part is connected into a vitreous body cutter, the pipe body is driven by an external power source to rotate, swing or vibrate around the center of the pipe body, so that the cutting liquid suction part can cut and absorb the eye tissue vitreous bodies, the cutting liquid suction part comprises a cutting head, the cutting head comprises a circular truncated cone-shaped base body, the diameter of the circular truncated cone-shaped base body is gradually increased from the top to the bottom, the bottom of the circular truncated cone-shaped base body is an arc-shaped surface, the center of the arc-shaped base body is downward, a cutting assembly is arranged at the bottom of the circular truncated cone-shaped base body, the cutting assembly is provided with a plurality of cutting wire structures horizontally protruding out of the side surface of the circular truncated cone-shaped base body, each cutting wire mechanism comprises arc-shaped cutting wires which are in the same vertical plane but have different radians, gaps among the arc-shaped cutting wires, and the arc-shaped cutting wires are connected into a whole through a plurality of straight cutting wires; the negative pressure liquid suction channel is arranged in the circular truncated cone-shaped base body, the bottom opening of the negative pressure liquid suction channel is positioned on the side face of the circular truncated cone-shaped base body and is higher than the cutting assembly, and the top opening of the negative pressure liquid suction channel is connected with a negative pressure liquid suction pipe penetrating through the pipe body.
As an optimized scheme of the vitreous cutting head for cutting the eye tissue vitreous body, the negative pressure liquid suction channel is distributed in an arc shape in the height direction of the round table-shaped base body, and the diameter of the negative pressure liquid suction channel is gradually reduced from one end with the bottom opening to one end with the top opening.
As another optimization scheme of the vitreous cutting head for cutting the vitreous body of the eye tissue, a plurality of cutting teeth are distributed in the bottom opening of the negative pressure imbibing channel and are randomly distributed, so that the vitreous body fluid entering the negative pressure imbibing channel is cut again.
As another optimization scheme of the glass cutting head for cutting the eye tissue glass body, the lower part of the circular truncated cone-shaped base body is provided with a circular bottom plate integrated with the circular truncated cone-shaped base body through a hollow connecting rod, the lower surface of the circular bottom plate is an arc-shaped surface with a downward convex center, an installation cavity with an opening at the edge is formed between the circular bottom plate and the bottom of the circular truncated cone-shaped base body, a cutting cutter disc of the cutting assembly is located in the installation cavity, and a plurality of cutting wire structures are distributed at the edge of the cutting cutter disc and extend out of an edge opening of the installation cavity.
As another optimized scheme of the glass cutting head for cutting the eye tissue vitreous body, the center of the truncated cone-shaped base body is provided with a shaft hole channel penetrating through the height direction of the base body, a hollow shaft is arranged in the shaft hole channel through a rotating bearing, the bottom of the hollow shaft is fixedly connected with a cutting cutter disc, the upper part of the hollow shaft is driven to rotate by external rotating power, and then the cutting cutter disc drives a cutting wire structure at the edge to complete cutting of the vitreous body fluid; the hollow connecting rod is arranged in the hollow shaft through the rotating bearing, and the bottom end of the hollow connecting rod penetrates out of the hollow shaft to fix the circular bottom plate.
As another optimization scheme of the glass cutting head for cutting the eye tissue vitreous body, a plurality of protruding spines with tip ends inclining downwards are uniformly distributed on the edge of the circular bottom plate, an included angle formed between each protruding spine and the lower surface of the circular bottom plate is 110-150 degrees, and in the vertical direction, the tip ends of the protruding spines do not exceed the edge of the cutting wire structure.
As another optimization scheme of the vitreous cutting head for cutting the vitreous body of the eye tissue, a positive pressure air supply mechanism is arranged in the circular truncated cone-shaped base body and comprises an air supply channel positioned in the hollow connecting rod, the upper end of the air supply channel is communicated with a sterile air source, the lower end of the air supply channel is communicated with an air supply cavity in the circular bottom plate, and the air supply cavity is provided with an air distribution hole communicated with the interior of the installation cavity, so that sterile air with the flow rate of 0.2-0.3m/s and the pressure of 1.2-1.6 times of the intraocular pressure of a patient is continuously injected into the installation cavity.
As another optimization scheme of the glass cutting head for cutting the eye tissue vitreous body, a sealing cavity which does not influence the rotation of the hollow shaft is arranged outside the hollow shaft, the sealing cavity is communicated with the inside of the hollow shaft through an air inlet hole formed in the hollow shaft, the upper end of an air supplementing channel in the hollow connecting rod is opened so as to be communicated with the inside of the hollow shaft, and the sealing cavity is communicated with a sterile air source through a sterile air pipe.
As another optimized scheme of the glass cutting head for cutting the eye tissue vitreous body, the truncated cone-shaped base body is arranged at the bottom of the tube body through a connecting tube, a cavity is formed in the connecting tube, and the hollow shaft and the sealing cavity at the end part of the hollow shaft are arranged in the cavity.
As another optimization scheme of the glass cutting head for cutting the eye tissue vitreous body, the bottom of the connecting pipe is fixedly connected with the circular truncated cone-shaped base body, the top end of the connecting pipe is detachably connected with the bottom of the pipe body, a negative pressure transition pipe and an air supply transition pipe are arranged in the connecting pipe, the bottom end of the negative pressure transition pipe is connected with the top opening of the negative pressure liquid suction channel, the bottom end of the air supply transition pipe is communicated with the sealing cavity, when the connecting pipe is connected with the pipe body, the negative pressure transition pipe is tightly butted and integrally with the negative pressure liquid suction pipe penetrating through the pipe body, the air supply transition pipe is tightly butted and integrally with the sterile air pipe penetrating through the pipe body, the top end of the hollow shaft is tightly butted and integrally with a rotating shaft arranged in the pipe body, and the rotating shaft drives the hollow shaft to rotate.
Compared with the prior art, the invention has the following beneficial effects:
1) According to the glass cutting head, the cutting wire mechanism is arranged at the bottom of the circular truncated cone-shaped base body, so that under the action of a rotating, vibrating or swinging power source, the cutting wire mechanism can directly cut vitreous humor, the negative pressure liquid suction channel in the upper area of the cutting wire mechanism can suck the cut vitreous humor, and the structure that the lower cutting upper part sucks the vitreous humor solves the problem that lesion vitreous humor is difficult to suck, the liquid suction process is smoother, and the efficiency is higher;
2) The diameter of the truncated cone-shaped base body is gradually increased from top to bottom, and meanwhile, the opening position at the bottom of the negative pressure liquid suction channel is higher than the position of the cutting assembly, so that the situation that the cutting assembly firstly contacts the vitreous humor to cut is always ensured when the vitrectomy head works, and the position of the negative pressure liquid suction channel is positioned above the oblique rear part of the cutting assembly, so that the direct absorption of the vitreous humor is avoided, more importantly, the diseased vitreous humor is generally positioned in the middle-lower part area of the vitreous humor, and the cutting assembly can fully cut the diseased vitreous humor when the absorption of the negative pressure liquid suction channel on the vitreous humor is ensured; the bottom surface of the truncated cone-shaped base body is an arc-shaped surface with a downward convex center, the arc-shaped surface is in contact with eye tissues, and the eye tissues cannot be mechanically impacted and damaged in the vibration, rotation or swinging process of the glass cutting head;
3) The cutting wire mechanism in the cutting assembly is composed of a plurality of arc-shaped cutting wires with different radians in the same vertical plane, the arc-shaped cutting wires can cut vitreous humor with a certain depth, in order to increase the strength of the cutting wire mechanism, the arc-shaped cutting wires are connected and fixed into a whole by a plurality of straight cutting wires, and finally a silk screen formed by the cutting wires is formed;
4) The cutting machine utilizes the hollow shaft to drive the cutter disc and the cutting wire structure to horizontally rotate to cut vitreous humor, so that the cutting efficiency is higher and the cutting is more stable; the cutting cutter disc is arranged in the mounting cavity between the circular base plate and the circular truncated cone-shaped base body, the circular base plate is fixed by the hollow connecting rod in the hollow shaft, and sterile air is blown into the mounting cavity by the hollow connecting rod, so that the blown sterile air can not directly impact eye tissues, but can cause a stirring effect on vitreous humor in the process of flowing out of the mounting cavity, and can play a role in assisting the balance of eye pressure in the operation process; the downward-inclined protruding spikes are arranged on the peripheral edge of the round bottom plate, and can cut and crush lens nuclei when the pipe body drives the circular truncated cone-shaped base body to vibrate, swing or rotate, so that the integral cutting effect on vitreous humor is improved;
5) The cutting and liquid-absorbing part is connected with the pipe body through the detachable connecting pipe, so that the cutting and liquid-absorbing part can be independently cleaned after being taken down, and the cutting wire in the cutting and liquid-absorbing part can be replaced.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic cross-sectional view of the cutting liquid-sucking part according to the present invention;
FIG. 3 is an enlarged view of the cutting pipette of the present invention;
FIG. 4 is a schematic view of the internal structure of the connecting tube;
FIG. 5 is a bottom view of the circular base plate;
reference numerals: 1. the cutting device comprises a connecting part, 2, a pipe body, 201, a rotating shaft, 202, a negative pressure pipette, 203, a sterile air pipe, 3, a connecting pipe, 301, a cavity, 302, a negative pressure transition pipe, 303, an air replenishing transition pipe, 4, a cutting head, 401, a truncated cone-shaped base body, 402, a circular bottom plate, 403, an installation cavity, 404, a negative pressure pipette channel, 405, a cutting tooth, 406, a shaft hole channel, 407, an air replenishing cavity, 408, a protruding spine, 5, a cutting assembly, 501, a cutting cutter disc, 502, an arc cutting wire, 503, a straight cutting wire, 6, a positive pressure air replenishing mechanism, 601, a hollow shaft, 602, a hollow connecting rod, 603, an air replenishing channel, 604, an air inlet hole, 605 and a sealing cavity.
Detailed Description
The technical solution of the present invention is further described in detail with reference to the following specific embodiments. The following embodiments of the present invention are not illustrated, and examples thereof include a structure of the connecting portion, a structure of the pipe body, and a power source for driving the pipe body to rotate, swing, or vibrate.
Example 1
As shown in fig. 1-3, a vitrectomy head for cutting eye tissue vitreous body, comprises a tube body 2, wherein two ends of the tube body 2 are respectively provided with a connecting part 1 and a cutting and liquid sucking part, the connecting part 1 is connected with a vitreous body cutter, the tube body 2 is driven by an external power source to rotate, swing or vibrate around the center of the tube body, so that the cutting and liquid sucking part can cut and suck the eye tissue vitreous body, the cutting and liquid sucking part comprises a cutting head 4, the cutting head 4 comprises a truncated cone-shaped base 401 with the diameter gradually increasing from the top to the bottom, the bottom of the truncated cone-shaped base 401 is an arc-shaped surface with the center protruding downwards, the bottom of the truncated cone-shaped base 401 is provided with a cutting assembly 5, the cutting assembly 5 is provided with a plurality of cutting wire structures protruding out of the side surface of the truncated cone-shaped base 401 horizontally, each cutting wire mechanism comprises arc-shaped cutting wires 502 which are in the same vertical plane but have different radians, gaps are arranged among the arc-shaped cutting wires 502, and the arc-shaped cutting wires 502 are connected into a whole through a plurality of straight cutting wires 503; a negative pressure liquid suction channel 404 is arranged in the circular truncated cone-shaped base body 401, the bottom opening of the negative pressure liquid suction channel 404 is arranged on the side surface of the circular truncated cone-shaped base body 401 and is higher than the cutting assembly 5, and the top opening is connected with a negative pressure liquid suction pipe 202 penetrating through the pipe body 2.
In this embodiment, the arc-shaped cutting wires 502 have different lengths, but both ends are fixed on the same plane, so as to form a plurality of mesh structures with different arcs and in the same vertical plane.
In the present embodiment, the negative pressure pipette 202 can be connected to a negative pressure source after the attachment 1 is attached to the vitreous cutter, so as to suck and store the cut vitreous humor, which belongs to the structure of the existing vitreous cutter and is not described herein; in addition, the rotation, swing or vibration of the tube body 2 driven by the vitreous cutter, or the composite motion of more than two of the rotation, swing and vibration, belong to the prior art, and do not relate to the improvement point of the present invention, and are not described herein.
The foregoing is a basic embodiment of the present invention, and further modifications, optimizations and limitations can be made on the foregoing, so as to obtain the following examples:
example 2
The present embodiment is an improved scheme based on embodiment 1, and the main structure of the present embodiment is the same as that of embodiment 1, and the improvement point is: as shown in fig. 3, the negative pressure suction passage 404 is distributed in an arc shape in the height direction inside the truncated cone-shaped base 401, and the diameter thereof gradually decreases from the bottom opening end to the top opening end.
Example 3
The present embodiment is another modified scheme based on embodiment 1, and the main structure of the present embodiment is the same as that of embodiment 1, and the improvement point is that: as shown in FIG. 3, a plurality of cutting teeth 405 are arranged in the bottom opening of the negative pressure suction channel 404, and the cutting teeth 405 are distributed irregularly, so that the vitreous humor entering the negative pressure suction channel 404 is cut again.
In this embodiment, the cutting teeth 405 are in the form of flat triangles or pyramids that when seated have a somewhat upward pointing tip with a sharp edge forming a cutting edge toward the direction of vitreous humor entry. By irregular distribution, it is meant that the cutting teeth 405 are distributed without any regularity so that the vitreous humor is cut by as many cutting teeth 405 as possible during the aspiration process.
In this embodiment, the cutting teeth 405 are distributed around the bottom opening of the suction channel 404 and extend into the bottom opening of the suction channel 404 for a certain length, and the tip of the cutting tooth 405 on the lower side is located between two cutting teeth 405 on the corresponding position on the upper side.
Of course, this embodiment may also be modified based on embodiment 1, so as to obtain another technical solution.
Example 4
The present embodiment is another modified scheme based on embodiment 1, and the main structure of the present embodiment is the same as that of embodiment 1, and the improvement point is that: as shown in fig. 3, the circular base plate 402 integrated with the circular truncated cone-shaped base 401 is arranged at the lower part of the circular truncated cone-shaped base 401 through a hollow connecting rod 602, the lower surface of the circular base plate 402 is an arc-shaped surface with a downward convex center, an installation chamber 403 with an open edge is formed between the circular base plate 402 and the bottom of the circular truncated cone-shaped base 401, the cutter disc 501 of the cutting assembly 5 is located in the installation chamber 403, and the plurality of cutting wire structures are distributed at the edge of the cutter disc 501 and extend out of the edge opening of the installation chamber 403.
Example 5
This embodiment is an improved scheme based on embodiment 4, and the main structure thereof is the same as embodiment 4, and the improvement point is that: as shown in fig. 3, the center of the circular truncated cone-shaped base 401 has an axial hole channel 406 penetrating through the height direction thereof, a hollow shaft 601 is installed in the axial hole channel 406 through a rotating bearing, the bottom of the hollow shaft 601 is fixedly connected with the cutter disc 501, the upper part is driven by external rotating power to rotate, and then the cutter disc 501 drives the cutting wire structure at the edge to complete the cutting of the vitreous humor; the hollow connecting rod 602 is disposed in the hollow shaft 601 through a rotating bearing, and the bottom end of the hollow connecting rod penetrates through the hollow shaft 601 to fix the circular bottom plate 402.
In this embodiment, the hollow connecting rod 602 is disposed inside the hollow shaft 601 through a rotating bearing, thereby achieving a technical effect that the hollow shaft 601 can rotate without rotating the hollow connecting rod 602. Similarly, the hollow shaft 601 is mounted in the shaft hole channel 406 through a rotation bearing, also for ensuring the rotation of the hollow shaft 601.
Example 6
This embodiment is another modified scheme based on embodiment 5, and the main structure thereof is the same as embodiment 5, and the improvement point is that: as shown in fig. 3 and 5, a plurality of protruding spikes 408 with tips inclined downwards are uniformly distributed on the edge of the circular bottom plate 402, an included angle formed between the protruding spikes 408 and the lower surface of the circular bottom plate 402 is 110-150 °, and in the vertical direction, the tips of the protruding spikes 408 do not exceed the edge of the cutting wire structure.
In this embodiment, the included angle between the protruding spike 408 and the lower surface of the circular bottom plate 402 is an included angle formed between a connection a of the tip of the protruding spike 408 and the edge of the circular bottom plate 402 and a tangent B at the edge of the circular bottom plate 402.
Example 7
This embodiment is another modified scheme based on embodiment 5, and the main structure thereof is the same as embodiment 5, and the improvement point is that: as shown in fig. 3, a positive pressure air supplement mechanism 6 is provided in the circular truncated cone-shaped base 401, the positive pressure air supplement mechanism 6 includes an air supplement channel 603 in a hollow connecting rod 602, the upper end of the air supplement channel 603 is communicated with a sterile air source, the lower end is communicated with an air supplement cavity 407 in the circular base plate 402, and the air supplement cavity 407 has an air distribution hole communicated with the inside of the installation chamber 403, so that sterile air with a flow rate of 0.2-0.3m/s and a pressure of 1.2-1.6 times of the intraocular pressure of the patient is continuously injected into the installation chamber 403.
Example 8
This embodiment is another modified scheme based on embodiment 5, and the main structure thereof is the same as embodiment 5, and the improvement point is that: as shown in FIG. 4, the hollow shaft 601 has a sealed cavity 605 outside without affecting its rotation, and the sealed cavity 605 is communicated with the inside of the hollow shaft 601 through an air inlet hole 604 formed on the hollow shaft 601, the upper end of the air supply channel 603 in the hollow connecting rod 602 is opened, so as to be communicated with the inside of the hollow shaft 601, and the sealed cavity 605 is communicated with the sterile air source through the sterile air tube 203.
Example 9
This embodiment is an improved scheme based on embodiment 8, and the main structure thereof is the same as that of embodiment 8, and the improvement point is that: as shown in fig. 4, the circular truncated cone-shaped base 401 is disposed at the bottom of the pipe body 2 through a connecting pipe 3, the connecting pipe 3 has a hollow cavity 301 therein, and the hollow shaft 601 and a sealing cavity 605 at an end thereof are disposed in the hollow cavity 301.
Example 10
This embodiment is an improved scheme based on embodiment 9, and the main structure thereof is the same as embodiment 9, and the improvement point is as follows: as shown in fig. 4, the bottom of the connecting pipe 3 is fixedly connected to the truncated cone-shaped base 401, the top end of the connecting pipe is detachably connected to the bottom of the pipe body 2, for example, by means of a buckle, and a negative pressure transition pipe 302 and an air supply transition pipe 303 are provided in the connecting pipe 3, wherein the bottom end of the negative pressure transition pipe 302 is connected to the top opening of the negative pressure liquid suction channel 404, the bottom end of the air supply transition pipe 303 is communicated with the sealing cavity 605, when the connecting pipe 3 is connected to the pipe body 2, the negative pressure transition pipe 302 is tightly butted with the negative pressure liquid suction pipe 202 penetrating through the pipe body 2 to form an integral, the air supply transition pipe 303 is tightly butted with the sterile air pipe 203 penetrating through the pipe body 2 to form an integral, and the top end of the hollow shaft 601 is tightly butted with the rotating shaft 201 provided in the pipe body 2 to form an integral, and the rotating shaft 201 drives the hollow shaft to rotate.

Claims (5)

1. The utility model provides an eye tissue vitreous body cutting is with glass crop head, includes body (2), and the both ends of body (2) are provided with connecting portion (1) respectively and cut imbibition portion, connecting portion (1) are inserting behind the vitreous body cutterbar, and body (2) take place to wind its central vibration under the drive of external power source to make cutting imbibition portion accomplish cutting and absorption, its characterized in that to eye tissue vitreous body: the cutting liquid suction part comprises a cutting head (4), the cutting head (4) comprises a circular truncated cone-shaped base body (401) with the diameter gradually increasing from the top to the bottom, the bottom of the circular truncated cone-shaped base body (401) is an arc-shaped surface with the center protruding downwards, a cutting assembly (5) is arranged at the bottom of the circular truncated cone-shaped base body (401), the cutting assembly (5) is provided with a plurality of cutting wire structures protruding out of the side surface of the circular truncated cone-shaped base body (401) horizontally, each cutting wire mechanism comprises arc-shaped cutting wires (502) which are located in the same vertical plane but have different radians, gaps are formed among the arc-shaped cutting wires (502), and the arc-shaped cutting wires (502) are connected into a whole through a plurality of linear cutting wires (503); a negative pressure liquid suction channel (404) is arranged in the circular truncated cone-shaped base body (401), the bottom opening of the negative pressure liquid suction channel (404) is positioned on the side surface of the circular truncated cone-shaped base body (401) and is higher than the cutting assembly (5), and the top opening is connected with a negative pressure liquid suction pipe (202) penetrating through the pipe body (2); the negative pressure liquid suction channel (404) is distributed in an arc shape in the height direction in the circular truncated cone-shaped base body (401), and the diameter of the negative pressure liquid suction channel is gradually reduced from one end of the bottom opening to one end of the top opening; a plurality of cutting teeth (405) are distributed in the bottom opening of the negative pressure liquid suction channel (404), and the cutting teeth (405) are distributed irregularly, so that the vitreous humor entering the negative pressure liquid suction channel (404) is cut again;
the cutting assembly is characterized in that a circular bottom plate (402) integrated with the circular truncated cone-shaped base body (401) is arranged at the lower part of the circular truncated cone-shaped base body (401) through a hollow connecting rod (602), the lower surface of the circular bottom plate (402) is an arc-shaped surface with a downward protruding center, an installation cavity (403) with an opening at the edge is formed between the circular bottom plate (402) and the bottom of the circular truncated cone-shaped base body (401), a cutting cutter disc (501) of the cutting assembly (5) is located in the installation cavity (403), and a plurality of cutting wire structures are distributed at the edge of the cutting cutter disc (501) and extend out of the opening at the edge of the installation cavity (403);
the center of the circular truncated cone-shaped base body (401) is provided with a shaft hole channel (406) penetrating through the height direction of the circular truncated cone-shaped base body, a hollow shaft (601) is installed in the shaft hole channel (406) through a rotating bearing, the bottom of the hollow shaft (601) is fixedly connected with a cutting cutter disc (501), the upper part of the hollow shaft is driven to rotate by external rotating power, and then the cutting cutter disc (501) drives a cutting wire structure at the edge to complete cutting of vitreous humor; the hollow connecting rod (602) is arranged in the hollow shaft (601) through a rotating bearing, and the bottom end of the hollow connecting rod penetrates through the hollow shaft (601) to fix the circular bottom plate (402);
the air supply device is characterized in that a positive pressure air supply mechanism (6) is arranged in the circular truncated cone-shaped base body (401), the positive pressure air supply mechanism (6) comprises an air supply channel (603) in a hollow connecting rod (602), the upper end of the air supply channel (603) is communicated with a sterile air source, the lower end of the air supply channel is communicated with an air supply cavity (407) in the circular bottom plate (402), and the air supply cavity (407) is provided with an air distribution hole communicated with the interior of the installation cavity (403), so that sterile air with the flow rate of 0.2-0.3m/s and the pressure of 1.2-1.6 times of the intraocular pressure of a patient is continuously injected into the installation cavity (403).
2. The vitrectomy head of claim 1, wherein: a plurality of protruding spikes (408) with tip ends inclining downwards are uniformly distributed on the edge of the circular bottom plate (402), an included angle formed between the protruding spikes (408) and the lower surface of the circular bottom plate (402) is 110-150 degrees, and in the vertical direction, the tip ends of the protruding spikes (408) do not exceed the edge of the cutting wire structure.
3. The vitrectomy head of claim 1, wherein: the outside of the hollow shaft (601) is provided with a sealing cavity (605) which does not influence the rotation of the hollow shaft, the sealing cavity (605) is communicated with the inside of the hollow shaft (601) through an air inlet (604) arranged on the hollow shaft (601), the upper end of an air supply channel (603) in the hollow connecting rod (602) is opened so as to be communicated with the inside of the hollow shaft (601), and the sealing cavity (605) is communicated with a sterile air source through a sterile air pipe (203).
4. The vitrectomy head of claim 1, wherein: the round table-shaped base body (401) is arranged at the bottom of the pipe body (2) through a connecting pipe (3), a cavity (301) is formed in the connecting pipe (3), and the hollow shaft (601) and a sealing cavity (605) at the end of the hollow shaft are arranged in the cavity (301).
5. The vitrectomy head of claim 4, wherein: the bottom of the connecting pipe (3) is fixedly connected with the circular truncated cone-shaped base body (401), the top end of the connecting pipe is detachably connected with the bottom of the pipe body (2), a negative pressure transition pipe (302) and an air supplement transition pipe (303) are arranged in the connecting pipe (3), the bottom end of the negative pressure transition pipe (302) is connected with the top opening of the negative pressure liquid suction channel (404), the bottom end of the air supplement transition pipe (303) is communicated with the sealing cavity (605), when the connecting pipe (3) is connected with the pipe body (2), the negative pressure transition pipe (302) and the negative pressure liquid suction pipe (202) penetrating through the pipe body (2) are tightly butted into a whole, the air supplement transition pipe (303) and a sterile air pipe (203) penetrating through the pipe body (2) are tightly butted into a whole, the top end of the hollow shaft (601) and a rotating shaft (201) arranged in the pipe body (2) are tightly butted into a whole, and the hollow shaft (601) drives the hollow shaft to rotate.
CN202011571775.6A 2020-12-27 2020-12-27 Vitreous cutting head for cutting vitreous body of eye tissue Active CN112587300B (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101790358A (en) * 2006-08-07 2010-07-28 爱尔康研究有限公司 Ultrasonic knife
CN203290984U (en) * 2013-05-09 2013-11-20 湖南康都制药有限公司 Miscarriage suction tube
CN109431680A (en) * 2018-12-06 2019-03-08 苏州理想眼科医院有限公司 A kind of novel high-frequency glass cutting head

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101790358A (en) * 2006-08-07 2010-07-28 爱尔康研究有限公司 Ultrasonic knife
CN203290984U (en) * 2013-05-09 2013-11-20 湖南康都制药有限公司 Miscarriage suction tube
CN109431680A (en) * 2018-12-06 2019-03-08 苏州理想眼科医院有限公司 A kind of novel high-frequency glass cutting head

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Address after: E5-A29, Luoyang Robot Intelligent Equipment Industrial Park, No. 96 Binhe North Road, Luoyang City, Henan Province, 471000

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Patentee before: THE FIRST AFFILIATED HOSPITAL OF HENAN University OF SCIENCE AND TECHNOLOGY