Pterygium head separating knife

Abstract

The utility model discloses a pterygium head separating knife which comprises a handheld rod, a shallow separating head and a deep separating head, the shallow separating head and the deep separating head are arranged at the two ends of the handheld rod respectively, the tail of the shallow separating head is connected with the handheld rod, the head of the shallow separating head is bent in an arc shape, and the width of the shallow separating head is gradually narrowed from the tail to the head. The deep separating head comprises a clamping groove part and a blade part, the clamping groove part is connected with the blade part, the clamping groove part is detachably connected with the handheld rod through a clamping groove, the blade part is provided with a plurality of blades in the same direction of the handheld rod, and the blades comprise sharp-edge blades and blunt-edge blades which are arranged in a staggered mode. According to the utility model, not only is the scraping and tearing efficiency of commonly adhered pterygium improved, but also the scraping and tearing efficiency of tightly adhered pterygium is safely and effectively improved, the flatness of cornea is ensured, the repair of corneal epithelium is promoted, the relapse of pterygium is reduced, and the transparency of cornea is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to a pterygium head separation knife. Background Art

[0002] Histologically, the subepithelial tissue of pterygium is intrinsic to senile elastic degeneration (basophilic degeneration), accompanied by abnormal collagen fibers, dissolution of the corneal Descemet's membrane, and subsequent invasion of the superficial corneal layers. Vascular tissue within the pterygium can disrupt the Descemet's membrane and grow into the corneal stroma, firmly adhering to the cornea. Conventional methods use forceps and a blade, which grips the pterygium and pulls it up. The blade then acts on the area where the pterygium is attached to the cornea, separating the pterygium head from the cornea by half-tearing and half-cutting.

[0003] The head of a pterygium adheres to the cornea in two layers: superficial and deep. Those adhering to the superficial layer are relatively easy to remove, while using a blade to separate superficial adhesions increases the risk of corneal damage. Pterygium tightly adhered to the Descemet's membrane or even the superficial corneal stroma is difficult to remove and requires forceful tearing, which can break weak pterygium sections. Remaining pterygium tissue is tightly adhered to the cornea, making it difficult to control the force of a blade. Excessive force can damage the Descemet's membrane or even the corneal stroma, impairing corneal epithelial repair and causing opacities. However, insufficient force can prevent the remaining pterygium head from being removed, resulting in incomplete removal, impaired corneal epithelial healing, and potentially recurring pterygium. Postoperatively, poor corneal wound healing or recurrence of pterygium can increase the patient's medical burden and easily lead to medical disputes.

[0004] It can be seen that the above-mentioned prior art pterygium removal surgical instruments have the following problems:

[0005] 1. The blunt separation head and the rod are not integral, the material is relatively soft, and the compliance and controllability are poor.

[0006] 2. The design of the separation knife fails to take into account the characteristics of pterygium and corneal adhesion. For pterygium that is tightly adhered to the cornea, it is often insufficient to remove it, leaving pterygium residue, or excessive removal may damage the deep corneal stroma. When using a blade to separate the easily separated pterygium, it often damages the corneal anterior Descemet's layer or even the deep corneal stroma.

[0007] 3. When using a blade to scrape off residual pterygium from the cornea, it is easy to scrape too deep or too shallow. If scraping too deep, it will damage the corneal stroma and the wound will heal slowly after surgery. If scraping too shallowly, residual pterygium may cause recurrence after surgery.

[0008] Therefore, how to solve the above-mentioned deficiencies in the prior art has become the subject to be studied and solved in this utility model. Utility Model Content

[0009] In view of this, the purpose of the present invention is to provide a pterygium head separation knife.

[0010] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0011] A pterygium head separation knife comprises a handheld rod and a shallow separation head and a deep separation head respectively provided at both ends of the handheld rod; the tail of the shallow separation head is connected to the handheld rod, the head of the shallow separation head is curved in an arc shape, and the width of the shallow separation head gradually narrows from the tail to the head;

[0012] The deep separation head includes a slot portion and a blade portion, the slot portion is connected to the blade portion, the slot portion is detachably connected to the hand-held rod through the slot, and the blade portion is installed with several blades in the same direction of the hand-held rod, and the blades include sharp blades and blunt blades arranged in an alternating manner.

[0013] Furthermore, the sides of the blade portion on which the sharp blade and the blunt blade are mounted are serrated, and both the sharp blade and the blunt blade are mounted in the tooth grooves.

[0014] Furthermore, the serrations of the blade portion cover the blunt blade, and when the serrations located in the middle of the blade portion cover the blunt blade, the width of the blunt blade is 0.3 mm; when the serrations located at both ends of the blade portion cover the blunt blade, the width of the blunt blade is 0.15 mm.

[0015] Furthermore, the width of the cutting edge blade is 0.5 mm.

[0016] Furthermore, the curvature of the head of the shallow separation head matches the shape of the eyeball, and the curvature radius of the curvature is 15 mm.

[0017] Furthermore, the width of the head of the shallow separation head is 1 mm.

[0018] Furthermore, the outer surface of the handle is provided with anti-slip grooves.

[0019] Furthermore, the handheld rod is a telescopic rod.

[0020] Furthermore, the hand-held rod and the shallow separation head are integrally formed.

[0021] Compared with the existing technology, the advantages of the present invention are: by installing a shallow separation head with an arc adapted to the eyeball and a deep separation head with a "sharp-blunt staggered" design at both ends of the handheld rod, the two separation heads are respectively targeted at the two characteristics of pterygium adhering to the cornea, the design is simple, and the switch can be free and flexible, which not only improves the scraping efficiency of normally adhered pterygium, but also safely and effectively improves the scraping efficiency of tightly adhered pterygium, ensures corneal flatness, promotes corneal epithelial repair, reduces pterygium recurrence, and ensures corneal transparency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Attachment Figure 1 This is a schematic structural diagram of an embodiment of the present application;

[0024] Attachment Figure 2 This is a schematic structural diagram of a deep separation head according to an embodiment of the present application;

[0025] Attachment Figure 3 This is a schematic structural diagram of the blade portion of an embodiment of the present application;

[0026] Attachment Figure 4 This is a diagram of the shallow separation head in use according to an embodiment of the present application;

[0027] Attachment Figure 5 This is a diagram of the deep separation head in use according to an embodiment of the present application.

[0028] Description of reference numerals and components in the accompanying drawings:

[0029] 1. Hand-held rod; 2. Shallow separation head; 3. Deep separation head; 31. Slot part; 32. Blade part; 33. Blade. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solution of the present invention through specific implementation methods. Obviously, the described embodiments are only some of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0031] See attached Figures 1 to 5As shown, the present application proposes a pterygium head separation knife, comprising a handle 1 and a shallow separation head 2 and a deep separation head 3, respectively disposed at either end of the handle 1. The shallow separation head 2 is connected to the handle 1 at its tail end, and its head is curved, with the width of the shallow separation head 2 gradually narrowing from its tail end to its head end. The deep separation head 3 includes a slot portion 31 and a blade portion 32, the slot portion 31 being connected to the blade portion 32 and detachably connected to the handle 1 via the slot. The blade portion 32 is mounted with a plurality of blades 33 in the same direction as the handle 1. The blades 33 include sharp blades and blunt blades arranged in an alternating pattern.

[0032] The above structure is further described below:

[0033] The handle 1 in this embodiment is a cylindrical rod with a length of 12 cm and a diameter of 3 mm, making it convenient to hold the scalpel in a pen-like manner. The handle 1 and the superficial separation head 2 are integrally cast and made of steel, which is characterized by high strength, firmness, durability, and stability. The superficial separation head 2 is a blunt separation head. When the handle 1 is placed horizontally, the blunt separation head bends downward into an arc. The curvature of the blunt separation head matches the shape of the eyeball. The radius of curvature of the curvature is 15 mm, slightly larger than the diameter of the cornea, forming a quarter sphere. This allows the surgeon to adjust the spatula to insert into the gap between the pterygium and the cornea, thereby fitting the cornea. The blunt separation head is 1 mm wide and 0.2 mm thick, which facilitates insertion into the gap between the pterygium and the cornea, pushing and pulling the pterygium, and simultaneously generating tension on the closely attached pterygium on both sides, thereby bluntly tearing off the easily separated pterygium. The slot portion 31 and the blade portion 32 of the deep separation head 3 are made of a softer metal as a whole, which can well fit the hard steel handle 1. The slot portion 31 is provided with a slot that is compatible with the handle 1. The end of the handle 1 is clamped at the slot to achieve a detachable connection between the deep separation head 3 and the handle 1. The width of the blade portion 32 is 4mm, and the width of the blade portion 32 is in the same direction as the width direction of the horizontal rod 1. The blade portion 32 is serrated away from the slot portion 31 and is composed of two pieces of iron sheets of the same color. Several blades 33 are installed in the tooth grooves of the blade portion 32. The blades 33 include a sharp blade and a blunt blade arranged in an alternating manner. The blade width of the sharp blade exposed outside the tooth groove is 0.5mm. When the serrations in the middle of the blade portion 32 cover the blunt blade, the width of the blunt blade is 0.3mm. When the serrations at both ends of the blade portion 32 cover the blunt blade, the width of the blunt blade is 0.15mm. When the deep separation head 3 is processing the pterygium part that is closely connected to the cornea, the sharp blade, i.e., the sharp blade, removes the tightly adhered pterygium, and the staggered blunt blade, i.e., the blunt blade, prevents the sharp blade from cutting into the deep corneal plane, thereby effectively cutting off the deep-implanted pterygium attachment point and ensuring the flatness of the corneal plane, avoiding damage to the deep cornea and affecting postoperative vision, making the corneal epithelium repair faster, reducing the recurrence of pterygium, and making the operation quick and safe. The deep separation head 3 and the handheld rod 1 in this embodiment are detachably connected, which is easy to replace and keeps the deep separation head 3 sharp. The "sharp-blunt staggered" method of the present application keeps the deep separation head 3 safe and convenient, and ensures the integrity of the corneal plane.

[0034] During use, the present invention uses a shallow separation head 2 for treating shallowly adhered pterygium. The curved blunt separation head is inserted into the gap between the pterygium and the cornea to push or pull the pterygium, tearing it off the cornea. The deep separation head 3 is used to treat tightly adhered pterygium. The "sharp-blunt staggered" blade at the end of the spatula cuts it, making it safe and convenient while ensuring the integrity of the corneal plane. By arranging the shallow separation head 2 and the deep separation head 3 at both ends of the handheld rod 1, the present invention takes into account the treatment of pterygium adhered to the cornea. This solves the problem of insufficient removal of tightly adhered pterygium, resulting in residual pterygium, or excessive removal that damages the deeper corneal stroma. Simultaneously, a blade is used to separate the easily separated pterygium, eliminating the problem of damaging the corneal anterior Descemet's layer or even the deeper corneal stroma. Furthermore, the present invention solves the problem of scraping too deeply or too shallowly when scraping residual pterygium from the cornea with a blade.

[0035] Better, see attached Figure 1 As shown, the outer surface of the hand-held rod 1 of this embodiment is provided with anti-skid grooves to increase friction and improve the safety of use. The hand-held rod 1 adopts a telescopic rod to improve the applicability of this application.

[0036] As an implementable manner, the length and column diameter of the handheld rod 1 of this embodiment can be changed according to needs; the ball diameter of the shallow separation head 2, i.e., the blunt separation head, can be changed according to usage requirements.

[0037] The above description of the disclosed embodiments will enable those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein, but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A pterygium head separation knife, characterized in that: The device comprises a handheld rod and a shallow separation head and a deep separation head respectively arranged at both ends of the handheld rod; the tail of the shallow separation head is connected to the handheld rod, the head of the shallow separation head is curved in an arc shape, and the width of the shallow separation head gradually narrows from the tail to the head; The deep separation head includes a slot portion and a blade portion, the slot portion is connected to the blade portion, the slot portion is detachably connected to the hand-held rod through the slot, and the blade portion is installed with several blades in the same direction of the hand-held rod, and the blades include sharp blades and blunt blades arranged in an alternating manner.

2. The pterygium head separation knife according to claim 1, characterized in that: The sides of the blade portion where the sharp blade and the blunt blade are mounted are serrated, and both the sharp blade and the blunt blade are mounted in the tooth grooves.

3. The pterygium head separation knife according to claim 2, characterized in that: The serrations of the blade portion cover the blunt blade. When the serrations in the middle of the blade portion cover the blunt blade, the width of the blunt blade is 0.3 mm. When the serrations at both ends of the blade portion cover the blunt blade, the width of the blunt blade is 0.15 mm.

4. The pterygium head separation knife according to claim 1, characterized in that: The width of the cutting edge blade is 0.5 mm.

5. The pterygium head separation knife according to claim 1, characterized in that: The curvature of the head of the shallow separation head matches the shape of the eyeball, and the curvature radius of the curvature is 15 mm.

6. The pterygium head separation knife according to claim 1, characterized in that: The head width of the shallow separation head is 1 mm.

7. The pterygium head separation knife according to claim 1, characterized in that: The outer surface of the hand-held rod is provided with anti-slip grooves.

8. The pterygium head separation knife according to claim 1, characterized in that: The hand-held rod is a telescopic rod.

9. The pterygium head separation knife according to claim 1, characterized in that: The hand-held rod and the shallow separation head are integrally formed.

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