CN212547362U

CN212547362U - Lacrimal point biting and cutting device with lacrimal point expanding function

Info

Publication number: CN212547362U
Application number: CN202022267591.2U
Authority: CN
Inventors: 逄作祥; 李迎
Original assignee: Individual
Current assignee: Weifang Eye Hospital Co ltd
Priority date: 2020-10-13
Filing date: 2020-10-13
Publication date: 2021-02-19
Anticipated expiration: 2030-10-13

Abstract

The invention belongs to the technical field of equipment used in ophthalmic surgery, and particularly relates to a punctum biting and cutting device with a punctum expanding function. The lacrimal punctum biting and cutting device comprises a clamping part, wherein the middle of the clamping part is a main body part, the tail end of the main body part is provided with a connecting part, the tail end of the connecting part is a convex part with a tip, and the lacrimal punctum biting and cutting device is inserted into a lacrimal punctum through the tip of the convex part so as to perform lacrimal punctum forming operation on lacrimal polyp or narrow lacrimal punctum tissues. Because the tail end of the connecting part is provided with the convex part with the tip, the device can be conveniently inserted into the punctum when the device is used for carrying out operation on the symptoms of punctum stenosis or polyp, thereby being convenient for the operation of medical staff and avoiding the defect of increasing the pain of patients caused by the repeated expansion of the punctum by adopting the expander; the device of the invention also greatly reduces the operation time and further relieves the pain of patients.

Description

Lacrimal point biting and cutting device with lacrimal point expanding function

Technical Field

The invention belongs to the technical field of equipment used in ophthalmic surgery, and particularly relates to a punctum biting and cutting device with a punctum expanding function.

Background

A common trabecular bite (i.e., scleral bite) is constructed as follows:

the clamping part is provided with a main body part in the middle, the tail end close to the main body part is provided with a notch-shaped connecting part, the tail end of the connecting part is provided with a pressing part, the pressing part is close to a cylinder in shape, and the top end of the pressing part is of a plane structure.

CN2255838Y discloses an improved corneoscleral biting cutter, the included angle between the annular blade (3) of the head and the motion handle (2) is 135-165 degrees, the corneoscleral biting cutter manufactured according to the angle can not shield the visual field of the operator when used under an operating microscope, the operation is convenient, and the corneoscleral tissue biting cutter is accurate.

There is little disclosure of current punctal biters/devices. Both the bite-cutter disclosed in the above patent documents and the ordinary sclera bite-cutter are only suitable for the sclera operation, and if the bite-cutter is applied to the punctum operation, a punctum dilator needs to be additionally used, but the disadvantage of using the punctum dilator is obvious, for example, the operation is not convenient, the punctum dilator may need to be repeatedly used for dilating the punctum mouth for many times during the operation, then the bite-cutter head is rapidly inserted into the punctum mouth, and the punctum is often shrunk quickly and cannot be inserted into the punctum mouth because the punctum has elasticity, so the punctum mouth needs to be dilated again.

The reason for this is that the punctum has a certain elasticity, and its structure and elasticity vary from person to person, and although the punctum and sclera are part of the structure of the eyeball, their structure and elasticity are not exactly the same as the sclera. It is also determined that the devices they employ during a surgical procedure will have certain differences.

In clinical practice, if the sclera biting and cutting device or the common sclera biting and cutting device is directly applied to the punctum operation, the operation of medical personnel is inconvenient, the time consumption is long, and the pain of patients is increased. After many attempts, the inventor finds that if a common sclera bite cutter is used for treating punctum stenosis or polyp of punctum, a punctum expander is needed to assist the sclera bite cutter to be used together, but the punctum has elasticity, so that the elasticity degree of the punctum of different patients is different, and the pain of the patients can be increased by repeatedly using the conical expander; after expansion, the medical device is easy to contract and repeatedly expand, which not only takes a long time and is inconvenient for medical staff to operate, but also can increase the pain of patients. And the repeated expansion of the punctum by the slender conical punctum expander also increases the risk of damaging the lacrimal canaliculus epithelium, and even causes the accidental risks of penetrating damage of the lacrimal canaliculus wall, tear-open of the lacrimal punctum and the like sometimes.

In view of the foregoing, there is a need to invent a punctal incision device that is specifically directed to procedures for punctal conditions.

Disclosure of Invention

In order to solve the technical problem, the invention provides a lacrimal point biting and cutting device with a lacrimal point expanding function, and in the process of an operation, because the lacrimal point biting and cutting device provided by the invention is provided with a tip part, except the situations of severe stenosis and occlusion of the lacrimal point, the operation can be completed without the assistance of a lacrimal point expander for patients with ordinary lacrimal point stenosis and lacrimal point polyp; avoids the use of a special dilator to dilate the punctum, avoids the pain of the patient caused by the repeated use of the dilator, shortens the time and facilitates the operation of medical staff.

Only under the condition that the lacrimal punctum is severely narrow and blocked, because the tip part of the lacrimal punctum biting and cutting device is not particularly sharp, the tip part of the lacrimal punctum biting and cutting device can smoothly and rapidly enter the lacrimal punctum from the stoma to perform biting and cutting only after a needle head or a lacrimal punctum dilator penetrates and expands the blocked part and then the lacrimal punctum biting and cutting device of the invention is used.

The invention provides a lacrimal punctum biting and cutting device with a lacrimal punctum expanding function, which comprises a clamping part, wherein the middle of the clamping part is a main body part, the tail end of the main body part is provided with a connecting part, the tail end of the connecting part is a convex part with a tip, and the tip of the convex part is inserted into a lacrimal punctum so as to bite and cut lacrimal punctum polyp or narrow lacrimal punctum tissue to carry out lacrimal punctum forming operation.

A pointed male member includes a base and a tip portion positioned above the base.

The tip is blunt to avoid irreversible damage to the lacrimal canaliculus due to over-sharpening.

As a preferable scheme, the base body and the tip part above the base body are of an integral structure, so that the condition that the outer surface of the structure is not smooth due to welding of the base body and the tip part above the base body which are of separate structures is avoided,

similarly, the outer surface between the base body and the tip part is a smooth surface, so that the damage of the rough outer surface to the eye part is avoided in the operation process.

The base body is cylindrical, and the tip part is generally conical.

The diameter of the lower bottom surface of the tip part is the same as that of the base body.

Preferably, the height of the substrate is 0.3-0.6 mm, and the diameter is 0.5-1.5 mm; the height of the tip part is 0.7-1.5 mm, and the diameter of the lower bottom surface of the tip part is 0.5-1.5 mm;

preferably, the height of the substrate is 0.3-0.55 mm, and the diameter is 0.5-1.45 mm; the height of the tip part is 0.7-1.45 mm, and the diameter of the lower bottom surface of the tip part is 0.5-1.45 mm;

preferably, the height of the substrate is 0.3-0.5 mm, and the diameter is 0.5-1.4 mm; the height of the tip part is 0.7-1.4 mm, and the diameter of the lower bottom surface of the tip part is 0.5-1.4 mm;

preferably, the height of the substrate is 0.3-0.5 mm, and the diameter is 0.5-1.35 mm; the height of the tip part is 0.7-1.35 mm, and the diameter of the lower bottom surface of the tip part is 0.5-1.35 mm;

preferably, the height of the substrate is 0.3-0.5 mm, and the diameter is 0.5-1.3 mm; the height of the tip part is 0.7-1.3 mm, and the diameter of the lower bottom surface of the tip part is 0.5-1.3 mm;

preferably, the height of the substrate is 0.3-0.5 mm, and the diameter is 0.5-1.25 mm; the height of the tip part is 0.7-1.25 mm, and the diameter of the lower bottom surface of the tip part is 0.5-1.25 mm;

preferably, the height of the substrate is 0.3-0.5 mm, and the diameter is 0.5-1.2 mm; the height of the tip part is 0.7-1.4 mm, and the diameter of the lower bottom surface of the tip part is 0.5-1.2 mm;

preferably, the height of the substrate is 0.3-0.6 mm, and the diameter is 0.5-1.2 mm; the height of the tip part is 0.7-1.4 mm, and the diameter of the lower bottom surface of the tip part is 0.5-1.2 mm;

preferably, the height of the substrate is 0.3-0.55 mm, and the diameter is 0.5-1.2 mm; the height of the tip part is 0.7-1.35 mm, and the diameter of the lower bottom surface of the tip part is 0.5-1.2 mm;

preferably, the height of the substrate is 0.3-0.55 mm, and the diameter is 0.6-1.2 mm; the height of the tip part is 0.7-1.35 mm, and the diameter of the lower bottom surface of the tip part is 0.6-1.2 mm;

preferably, the height of the substrate is 0.3-0.5 mm, and the diameter is 0.6-1.1 mm; the height of the tip part is 0.7-1.35 mm, and the diameter of the lower bottom surface of the tip part is 0.6-1.1 mm;

preferably, the height of the substrate is 0.3-0.5 mm, and the diameter is 0.6-1.0 mm; the height of the tip part is 0.7-1.35 mm, and the diameter of the lower bottom surface of the tip part is 0.6-1.0 mm;

preferably, the height of the substrate is 0.3-0.5 mm, and the diameter is 0.6-1.1 mm; the height of the tip part is 0.7-1.3 mm, and the diameter of the lower bottom surface of the tip part is 0.6-1.1 mm;

preferably, the height of the substrate is 0.3-0.5 mm, and the diameter is 0.6-0.9 mm; the height of the tip part is 0.7-1.35 mm, and the diameter of the lower bottom surface of the tip part is 0.6-0.9 mm;

preferably, the height of the substrate is 0.3-0.5 mm, and the diameter is 0.6-0.85 mm; the height of the tip part is 0.7-1.2 mm, and the diameter of the lower bottom surface of the tip part is 0.6-0.85 mm;

preferably, the height of the substrate is 0.3-0.5 mm, and the diameter is 0.6-1.0 mm; the height of the tip part is 0.7-1.1 mm, and the diameter of the lower bottom surface of the tip part is 0.6-1.0 mm;

preferably, the height of the substrate is 0.3-0.5 mm, and the diameter is 0.6-0.9 mm; the height of the tip part is 0.7-1.1 mm, and the diameter of the lower bottom surface of the tip part is 0.6-0.9 mm;

more preferably, the height of the substrate is 0.4-0.5 mm, and the diameter is 0.7-0.9 mm; the height of the tip part is 0.7-1.5 mm, and the diameter of the lower bottom surface of the tip part is 0.7-0.9 mm;

preferably, the sum of the heights of the base body and the tip portion is less than or equal to 4 mm;

preferably, the sum of the heights of the base body and the tip part is 1-1.2 mm;

preferably, the sum of the heights of the base body and the tip part is 1-1.2 mm, and the height of the base body is not less than 0.2 mm.

Alternatively, as a preferable mode, the base body is a plane with a round bottom, the upper part is a curved surface protruding upwards, and the center of the base body is provided with a tip part. That is, the base and tip portions resemble the shape of a nipple; the whole tip part is in a cylindrical shape, and the front end of the tip part is in a smooth and passivated conical shape or a spherical shape; preferably, the ratio of the diameter of the tip part to the base body is 1: 2-6; the above structure can also play a role in facilitating the operation.

Preferably, the base body is a plane with a round bottom, the upper part of the base body is a curved surface protruding upwards, and the center of the base body is provided with a tip part and a tip part which are integrally conical;

as a preferable mode, the base body may have a truncated cone shape, and a tip portion is formed at a central position of the base body; preferably, the diameter ratio of the tip part to the bottom surface of the base body is 1: 3-6; the edge of the upper part of the same round table is not in a shape of an edge corner and is a smooth curved surface;

or the base body is a plane with a round bottom, the upper part is an upward protruding curved surface, and a tip part is arranged at the center of the base body; preferably, the tip part is in a cylindrical shape or a conical shape as a whole, and the front end of the tip part is in a smooth and passivated conical shape or a spherical shape; preferably, the ratio of the diameter of the tip part to the base body is 1: 2-6;

the size and specification of the tip part can influence the effect of the operation of the lacrimal punctum, and if the tip part is too short, the device is inconvenient to enter the lacrimal punctum during the operation; if the tip part is too long, the device can enter the lacrimal punctum too deeply during operation, and the operation is also inconvenient; therefore, the present inventors have made extensive clinical experiments and research to set the specification of the tip portion within the above range, so that the device of the present invention can achieve a good surgical effect.

The height of the connecting part is set to be 1-3 mm, which is an ideal and proper height; preferably 1.8-2.2 mm; the connecting part is too high, so that the phenomenon of distortion and deformation is easy to occur, and if the connecting part is too short, the phenomenon of inconvenient operation is easy to occur; therefore, the height of the connecting part is set in the range, so that the phenomenon of distortion is avoided, and the operation is facilitated; similarly, the diameter of the connecting part is set based on the principle;

as a preferable structure, in the above-mentioned punctum biting and cutting device having the punctum expanding function, the lower bottom of the base body may be provided with a notch portion having a circular arc-shaped cross section;

preferably, the lower bottom of the base body is provided with a gap part with a circular arc-shaped section, and the radian is 180-240 degrees;

preferably, the lower part of the substrate is provided with a gap part with a triangular section;

preferably, the lower part of the substrate is provided with a gap part with a regular triangle section;

preferably, the lower part of the base body is provided with a gap part with a semicircular section;

preferably, the lower part of the base body is provided with a notch part with a rectangular cross section;

preferably, the lower part of the base body is provided with a gap part with a diamond-shaped section;

preferably, the lower portion of the base body has a notch portion having a regular pentagon/regular hexagon cross section.

Preferably, the base body can also be in a cuboid shape, a square shape and other structures, and the cross sections of different shapes correspond to connecting parts (similar to the metal rod) of different shapes, that is, when the base body with different cross section shapes is used, the metal rod can also take different shapes correspondingly. For example, the base body is cylindrical, so that the connecting part is in the shape of a circular arc sheet; the substrate is square or cuboid, so that the connecting part has a cuboid strip or sheet structure; the surface of the substrate has no edges and corners and is a smooth curved surface, and the purpose of the substrate is also to prevent the damage to eyes.

Accordingly, the shape of the sleeve outside the propulsion mechanism in the body portion matches the shape of the coupling portion described above. A rod with a square cross section is combined with a sleeve with a square cross section to form a telescopic biting structure.

The convex part with the tip is made of medical stainless steel materials or titanium alloy materials;

or the whole punctum biting and cutting device is made of stainless steel materials or titanium alloy materials, and the device made of the materials is not easy to corrode, durable and long in service life in clinical use.

The invention has the beneficial effects that:

(1) the tail end of the connecting part is provided with the convex part with the tip, so that when the device is used for carrying out operation on narrow or polyp symptoms of the punctum, the device can be conveniently inserted into the punctum to play a good role in fixing the punctum, thereby facilitating the operation of medical staff and avoiding the defect of enhancing the pain of patients caused by the repeated expansion of the punctum by adopting the expander;

namely, the invention plays a positive improvement role in terms of comfort and acceptability of patients;

(2) the device effectively shortens the operation time, and the operation time of the device is compared with the operation time of the traditional trabecular biter based on the proficiency of the same medical staff, so that the result shows that the device saves 50-90% of the time. The operation time is reduced, and the pain of the patient in the operation is also reduced.

Drawings

FIG. 1 is a diagram of a conventional scleral bite;

FIG. 2 is an enlarged view of the distal end of a conventional scleral bite device;

FIG. 3 is an enlarged view of the structure of a male member with a tip according to embodiment 1A of the present invention;

FIG. 4 is an enlarged view of the pointed male member of FIG. 3 according to the present invention;

FIG. 5 is a central longitudinal cross-sectional view of a male member with a tip according to example 2 of the present invention;

FIG. 6 is a bottom view of the base member in example 2 of the present invention;

FIG. 7 is a central longitudinal cross-sectional view of a male member with a tip according to example 4 of the present invention;

FIG. 8 is an enlarged view of the structure of a male member with a tip according to embodiment 3 of the present invention;

1-a clamping part; 101-a first clamping part, 102-a second clamping part; 2-a main body portion; 301-a first connecting rod, 302-a second connecting rod, 4-a propelling mechanism; 5-a sleeve; 6-a substrate; 7-connecting part, 8-second concave part, 9-anti-slip line, 10-tip part and 11-gap part.

Detailed Description

The present invention will now be further described with reference to specific embodiments in order to enable those skilled in the art to better understand the present invention.

The sclera bite-cutter, namely the trabecular bite-cutter, is the instrument used in the trabeculectomy, but the bite-cut part is at the corneoscleral margin, so the instrument is also called the sclera bite-cutter, and the sclera bite-cutter are commonly used clinically.

Example 1A

The invention provides a lacrimal occlusion device with a lacrimal punctum expansion function, which comprises a clamping part, wherein the middle of the clamping part is a main body part, the tail end of the main body part is provided with a notch-shaped connecting part, and the tail end of the connecting part is provided with a convex part with a tip.

The convex part with the tip comprises a cylindrical base body and a conical tip part positioned above the base body; the base body and the tip part form an integral structure;

the aforementioned convex member with a pointed end is inserted into a punctum through its pointed end to bite and cut a punctal polyp or a narrow punctal tissue, thereby performing a punctal angioplasty.

The tip portion is a blunt, non-sharp cone to prevent it from being too sharp and causing irreversible damage to the punctum.

The diameter of the lower bottom surface of the tip part is the same as that of the base body, and the outer surfaces of the tip part and the base body are smooth surfaces; in addition, the connecting part of the tip part and the base body is also a smooth transition surface to prevent damage to the punctum.

The height of the substrate is 0.5mm, and the diameter is about 0.7 mm; the height of the tip part is about 1.2mm, and the diameter of the lower bottom surface of the tip part is about 0.7 mm.

The size and specification of the tip part can influence the effect of the operation of the lacrimal punctum, and if the tip part is too short, the device is inconvenient to enter the lacrimal punctum during the operation; or too long tip, this can result in the device entering too deep into the punctum during surgery, which is also inconvenient to operate; therefore, the present inventors have made extensive clinical experiments and research to set the specification of the tip portion within the above range, so that the device of the present invention can achieve a good surgical effect.

The length of the connecting part is 1.5-2 mm, which is an ideal length; the connecting part is too long, so that the phenomenon of bending deformation is easy to occur, and if the connecting part is too short, the phenomenon of inconvenient operation is easy to occur; therefore, the height of the connecting part is set in the range, so that the phenomenon of distortion is avoided, and the operation is facilitated; similarly, the diameter of the connecting part is set based on the principle; the connecting part can be of a rectangular sheet structure or a strip-shaped circular arc sheet structure;

the connecting part and the convex part with the tip are of an integral structure, so that the integral device is stressed uniformly and is firm, and the service life of the device is prolonged.

The integral punctum biting and cutting device is made of stainless steel materials or titanium alloy materials, and the device made of the materials is not easy to rust, durable and long in service life in clinical use.

In the above structure, the clamping part 1 includes a first clamping part 101 and a second clamping part 102, both of which are in an axisymmetric structure with respect to the main body part, the ends near the inner sides of the first clamping part 101 and the second clamping part 102 are respectively provided with a first connecting rod 301 and a second connecting rod 302 connected with the main body part 2, and the inner sides of the first clamping part 101 and the second clamping part 102 are respectively provided with a groove matched with the shape and size of the first connecting rod 301 and the second connecting rod 302; the main body part 2 is provided with a sliding groove corresponding to the positions of the first connecting rod 301 and the second connecting rod 302, the first connecting rod 301 and the second connecting rod 302 pass through the through hole to be detachably connected with the propelling mechanism 4, and the propelling mechanism 4 is positioned in the sliding groove of the main body part 2 and can slide back and forth along the sliding groove; the upper part of the propelling mechanism 4 is a sleeve 5, and the inner diameter of the sleeve 5 is slightly larger than or equal to the diameter of the base body 6. When the first clamping part 101 and the second clamping part 102 are clamped, the first clamping part and the second clamping part are attached to the main body part 2, and the sleeve 5 at the front end of the propelling mechanism 4 covers the connecting part 7 and the convex part with the tip; at this point, the connection portion 7 and the pointed male member are located within the sleeve 5. When the first and

second clamping portions

101 and 102 are released, the pushing mechanism 4 slides toward the rear end thereof, and the connecting portion 7 and the pointed male member are exposed. And the first and

second clamping portions

101 and 102 form a certain angle with the main body 2 by the supporting action of the first and second connecting

rods

301 and 302.

Two clamping grooves are formed in the tail end of the pushing mechanism 4, the first connecting rod 301 and the second connecting rod 302 are respectively located in the two clamping grooves, and the middle of the pushing mechanism 4 is matched with the sliding groove of the main body portion 2 and can slide back and forth along the sliding groove.

The first and

second clip portions

101 and 102 and the tail end of the main body 2 are joined to form an integral structure. The tail part of the whole biting and cutting device is provided with an outward and inward concave part 8, so that the biting and cutting device is convenient to hold by hands.

For the convenience of the medical staff, the first and

second grip portions

101 and 102 are provided with anti-slip threads 9 (anti-slip grooves) on the outer sides thereof, and the body portion 2 is also provided with anti-slip threads 9 on both sides thereof.

Of course, the main body 2 and the clip 1 may have other configurations as long as the effect of pushing the pusher 4 to slide forward is achieved.

By adopting the biting and cutting device with the structure of the embodiment 1, compared with the common trabecular biting and cutting device, the time is saved by about 3-10 minutes; the discomfort caused by the psychology and physiology of the patient in the process of long-time lying on the operating table is obviously reduced. And the smooth and convenient operation can reduce the fatigue of medical personnel and save time. The smooth and convenient operation can improve the operation quality, reduce unnecessary injuries and improve the curative effect.

Example 1B

The structure was substantially the same as that of example 1A except that the height of the base 6 was 0.6mm and the diameter was about 0.8 mm; the height of the tip 10 is about 1.1mm, and the diameter of the lower bottom surface of the tip 10 is about 0.8 mm.

Example 1C

The structure was substantially the same as that of example 1A except that the height of the base 6 was 0.7mm and the diameter was about 0.7 mm; the height of the tip 10 is about 1.2mm, and the diameter of the lower bottom surface of the tip 10 is about 0.7 mm.

Example 1D

The difference from example 1A is that the height of the substrate 6 is 0.4 mm; the rest is the same as in example 1A.

Example 1E

The difference from example 1A is that the height of the substrate 6 is 0.3 mm; the rest is the same as in example 1A.

Example 2

The cross section of the upper part of the base body 6 is circular, the lower part of the base body 6 is provided with a circular arc-shaped gap part 11, the radian is 200 degrees, the diameter of the gap part is smaller than that of the lower bottom surface of the base body 6, namely, a part of bowl-shaped structure is dug out from the middle of the base body 6, the structure is more convenient to fix and bite and cut, and the rest structures are the same as those of the embodiment 1A.

Example 3

The upper cross section of the basal body 6 is circular, the lower part of the basal body 6 is provided with a notch part 11 which is a triangular block, and the side length of the triangular block is smaller than the diameter of the lower bottom surface of the basal body 6. The rest of the structure is the same as in example 1A.

The notch portions in embodiments 2 and 3 may have any other suitable shape. The purpose of providing the notch is to facilitate the bite cut.

Example 4

The base body 6 is in a circular truncated cone shape, the upper part of the base body 6 is provided with a tip part 10, and the diameter of the lower bottom surface of the tip part 10 is smaller than that of the upper top part of the circular truncated cone-shaped base body 6. The integral convex part with the tip is in the shape of a nipple or a pot cover with a handle, and the base body 6 is of a solid structure.

Of course, in addition to example 4, a modification may be made in combination with example 2, and the bottom portion of the base 6 may be provided with the notch 11. Variations such as these also fall within the scope of the present invention.

The drawings in the present invention, which show only the positions and connections of the respective members, are subject to the dimensional ratios in the above embodiments and the scope of the claims, and the dimensional ratios in the drawings do not represent actual ratios thereof.

Similar variations to those described above are also within the scope of the present invention. Other alternatives, such as variations in the shape of the substrate, are also within the scope of the invention. The front end, the rear end, the tail end and the like of the invention only show relative position relations.

Claims

1. A punctum biting and cutting device having a punctum dilating function, the device comprising a holder, a main body part provided in the middle of the holder, and a connecting part provided at the distal end of the main body part, wherein the distal end of the connecting part is a projecting member having a tip, and the punctum forming operation is performed by biting and cutting a polyp or a stenotic punctum tissue of the punctum by inserting the tip of the projecting member into the punctum.

2. The punctal biting device with punctal dilation function of claim 1, wherein the pointed male member comprises a base and a tip portion above the base.

3. The punctal occlusion device of claim 2, wherein the tip portion is a blunted tip portion.

4. The punctal biting device with punctal dilation function of claim 2, wherein the base is of unitary construction with the tip portion above the base.

5. The punctal biting device with punctal dilation function of claim 2, wherein the outer surface between the base and the tip portion is a smooth surface.

6. The punctal biting device with punctal dilation function of claim 2, wherein the base is cylindrical and the tip is generally conical.

7. The punctal biting device with punctal dilation function of claim 2, wherein the substrate is cuboid or square or truncated ellipsoid in shape.

8. The punctal biting device with punctal dilation function of claim 2,

the surface of the substrate is a smooth curved surface.

9. The punctal biting device with punctal dilation function of claim 2,

the bottom of the base body is a round plane, the upper part of the base body is an upward protruding curved surface, and a tip part is arranged at the center of the base body.

10. The punctal biting device with punctal dilation function of claim 2, wherein the tip portion is generally cylindrical and the front end is smoothly blunted cone-shaped or spherical.

11. The punctal occlusion device of claim 2, wherein the ratio of the diameter of the tip portion to the base is 1:2 to 6.

12. The punctal biting device with punctal dilation function of claim 2, wherein the base has a bottom portion that is a circular flat surface, an upper portion that is an upwardly convex curved surface, and a tip portion at a central position of the base, the tip portion being generally conical.

13. The punctal biting device with punctal dilation function of claim 2, wherein the base is truncated cone shaped, and wherein the base has a tip portion at a central position thereof, the tip portion being generally cylindrical or conical.

14. The punctal biting device with punctal dilation function of claim 2, wherein the ratio of the diameter of the tip portion to the bottom surface of the base body is 1:3 to 6, and the tip portion is of a blunted structure; the height of the connecting part is 1-3 mm.

15. The punctal biting device with punctal dilation function of claim 14, wherein the height of the connection is 1.8-2.2 mm.

16. The punctal biting device with punctal dilation function of claim 2, wherein the diameter of the lower bottom surface of the tip portion is the same as the diameter of the base.

17. The punctal biting device with punctal dilation function of claim 2, wherein the substrate has a height of 0.3 to 0.6mm and a diameter of 0.5 to 1.5 mm; the height of the tip part is 0.7-1.5 mm, and the diameter of the lower bottom surface of the tip part is 0.5-1.5 mm.

18. The punctal biting device with punctal dilation function of claim 2, wherein the substrate has a height of 0.4 to 0.5mm and a diameter of 0.7 to 0.9 mm; the height of the tip part is 0.7-1.5 mm, and the diameter of the lower bottom surface of the tip part is 0.7-0.9 mm.

19. The punctal biting device with punctal dilation function of claim 2, wherein the sum of the heights of the base and tip portions is less than or equal to 4 mm.

20. The punctal biting device with punctal dilation function of claim 2, wherein the sum of the heights of the base and the tip is 1 to 1.5 mm.

21. The punctal biting device with punctal dilation function of claim 2, wherein the sum of the heights of the base and the tip portion is 1 to 1.5mm, and the height of the base is not less than 0.2 mm.

22. The punctal biting device with punctal dilation function according to claim 2, wherein the base has a cutout portion in the lower bottom of the base, the cutout portion having a circular arc-shaped cross section.

23. The punctal biting device with punctal dilation function according to claim 2, wherein the base has a cutout portion in the lower bottom of the base, the cutout portion having a circular arc-shaped cross section, and the arc being 180 ° to 240 °.

24. The punctal biting device with punctal dilation function according to claim 2, wherein the base has a cutout portion with a triangular cross-section at a lower portion thereof.

25. The punctal biting device with punctal dilation function according to claim 2, wherein the base has a cutout portion in the lower portion of the base, the cutout portion having a regular triangular cross-section.

26. The punctal biting device with punctal dilation function according to claim 2, wherein the base has a cutout portion in the lower portion of the base, the cutout portion having a semicircular cross section.

27. The punctal biting device with punctal dilation function according to claim 2, wherein the base has a cutout portion with a rectangular cross-section at a lower portion thereof.

28. The punctal biting device with punctal dilation function according to claim 2, wherein the base has a cutout portion with a diamond-shaped cross section at a lower portion thereof.

29. The punctal biting device with punctal dilation function according to claim 2, wherein the lower portion of the base body has a cutout portion having a cross section of regular pentagon/regular hexagon.

30. The punctal biting device with punctal dilation function of claim 2, wherein the pointed male member is made of medical stainless steel or titanium alloy.

31. The punctal biting device with punctal dilation function of claim 2, wherein the connecting portion and the pointed male member are made of medical stainless steel or titanium alloy.