Special incision knife for lacrimal sac under nasal endoscope

Abstract

The utility model relates to a lacrimal sac special incision knife under a nasal endoscope, which comprises a knife handle and a knife head, the knife head is arranged at the end part of the knife handle, the knife head is provided with two bending parts in opposite directions, the knife head comprises a first bending section and a second bending section, the first bending section and the extension direction of the knife handle form an obtuse angle, and the second bending section is provided with an obtuse angle. The first bending section and the second bending section are arranged in an obtuse angle mode, and the second bending section is of a rhombus structure. The incision knife special for the lacrimal sac under the nasal endoscope has the advantage that the lacrimal sac can be conveniently incised along the bone wall due to the arrangement of the opposite-direction double-included-angle lacrimal sac incision knife. When the lacrimal sac incision device is used in an operation, the lacrimal sac incision device can be tightly attached to a bone wall to incision a lacrimal sac, the lacrimal sac incision range is large, a lacrimal sac free valve is easily spread to be anastomotic with nasal mucosa, locking after lacrimal sac anastomotic stoma scar contraction is reduced, and the effects of reducing operation difficulty and improving the operation success rate are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical surgical instruments, in particular to a special lacrimal sac incision knife under nasal endoscope. Background Art

[0002] In the case of nasal endoscope examination, observing the lesion site is one of the most commonly used surgeries in otolaryngology, which can detect lesions deep in the nasal cavity. For the lacrimal sac incision knife under nasal endoscope, the commonly used one clinically is a 2.8mm cataract puncture knife. This knife is relatively sharp and is beneficial for incising the lacrimal sac. The disadvantage is that there is only one bending point at the front end of the knife head, which is only suitable for incising the lacrimal sac from the center and is not conducive to incising the lacrimal sac from the bone wall.

[0003] The incision knives in related prior arts can be seen in a special corneal auxiliary incision puncture knife for a new type of ophthalmic cataract surgery disclosed in Chinese Patent Application No. 202221908325.6, and a special main incision puncture knife for a new type of ophthalmic cataract surgery disclosed in Chinese Patent Application No. 202221804847.1. Due to only one bending point at the front end of the knife head, and the lacrimal sac is located on both sides of the nasal septum, the range of incising the lacrimal sac from the center of the lacrimal sac and inverting the lacrimal sac wall by the cataract puncture knife is small. When operating, it is not convenient for the attending doctor to hold the knife to incise the lacrimal sac, which is not conducive to incising the lacrimal sac from the bone wall outside the lacrimal sac, increasing the difficulty of the surgery. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a special lacrimal sac incision knife under nasal endoscope to solve the problems encountered in the above background art.

[0005] To achieve the above purpose, the technical solution of the utility model is as follows:

[0006] A special lacrimal sac incision knife under nasal endoscope includes a knife handle and a knife head. The knife head is installed at the end of the knife handle. The knife head is provided with two bending points in opposite directions. The knife head includes a first bending section and a second bending section. The first bending section is arranged at an obtuse angle with the extending direction of the knife handle. The first bending section and the second bending section are arranged at an obtuse angle. The second bending section is a rhombus structure.

[0007] In the above solution, the length of the first bending section is the same as that of the second bending section, and the included angle between the first bending section and the second bending section is between 135 - 175. As a preferred solution, blades are provided on both sides of the second bending section. Specifically, in terms of size, the length of the second bending section is 0.5 - 1.5 centimeters, and the width of the second bending section is 0.5 - 0.8 centimeters.

[0008] In the above solution, the cutter head further includes a transition section. One end of the transition section is connected to the handle along the extension direction of the handle, and the other end is connected to the first bending section and is arranged at an obtuse angle with the first bending section.

[0009] Among them, the handle is of a cylindrical structure, and the end of the handle is provided with a conical surface housing in the shape of a frustum of a cone. The conical surface housing is fixedly connected to the transition section. Specifically, in terms of dimensions, the length of the handle is 8 - 12 cm, the diameter of the handle is 0.5 - 0.8 cm; the length of the conical surface housing is 2 cm; the length of the transition section is the same as that of the first bending section, and the diameter of the transition section is 0.1 cm.

[0010] Compared with the prior art, the beneficial effects of the present utility model are as follows: The special lacrimal sac incision knife under nasal endoscope of the present utility model can closely adhere to the bone wall to incise the lacrimal sac during the operation. The range of incising the lacrimal sac is relatively large, and it is easy to spread out the free flap of the lacrimal sac to anastomose with the nasal mucosa, reducing the atresia of the lacrimal sac anastomosis opening after scar contraction, and having the effect of reducing the surgical difficulty and improving the surgical success rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The disclosure of the present utility model will be described with reference to the accompanying drawings. It should be understood that the drawings are only for illustrative purposes and are not intended to limit the protection scope of the present utility model. In the drawings, the same reference numerals are used to refer to the same components. Among them:

[0012] Figure 1 is the front view structural schematic diagram of the present utility model;

[0013] Figure 2 is the top view structural schematic diagram of the present utility model;

[0014] Reference numerals in the figure: 1 - handle; 11 - conical surface housing; 2 - cutter head; 21 - transition section; 22 - first bending section; 23 - second bending section. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0015] In order to make the technical means, creative features, achieved purposes and functions of the present utility model easy to understand, the present utility model will be further described in detail below with reference to the accompanying drawings. These drawings are all simplified schematic diagrams, only illustrating the basic structure of the present utility model in a schematic manner, so they only show the relevant components of the present utility model.

[0016] According to the technical solution of the present utility model, without changing the essence of the present utility model, those of ordinary skill in the art can propose various structural ways and implementation ways that can be mutually replaced. Therefore, the following detailed embodiments and the accompanying drawings are only exemplary descriptions of the technical solution of the present utility model, and should not be regarded as the whole of the present utility model or regarded as a limitation or restriction on the technical solution of the present utility model.

[0017] The technical solution of the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0018] Example 1, as Figure 1 and Figure 2 shown, a special lacrimal sac incision knife under nasal endoscope, including a knife handle 1 and a knife head 2. The knife head 2 is installed at the end of the knife handle 1, and the knife head 2 is provided with two bends in opposite directions. Specifically, the knife head 2 includes a first bending section 22 and a second bending section 23. The first bending section 22 is arranged at an obtuse angle with the extending direction of the knife handle 1, which is the first bend. The first bending section 22 and the second bending section 23 are arranged at an obtuse angle, which is the second bend. In addition, the second bending section 23 is a rhombus structure, forming a double-angle structure, so as to facilitate the incision of the left and right lacrimal sacs better.

[0019] The special lacrimal sac incision knife under nasal endoscope of the present utility model can closely adhere to the bone wall to incise the lacrimal sac during the operation. The range of incising the lacrimal sac is large, and it is easy to spread out the free flap of the lacrimal sac to anastomose with the nasal mucosa, reducing the atresia after the scar contraction of the lacrimal sac anastomosis opening, and having the effect of reducing the operation difficulty and improving the operation success rate.

[0020] During implementation, the length of the first bending section 22 is the same as the length of the second bending section 23, and the included angle between the first bending section 22 and the second bending section 23 is between 135° and 175°. The length of the second bending section 23 is 0.5 - 1.5 cm, and the width of the second bending section 23 is 0.5 - 0.8 cm. It can be set that the lengths of both the first bending section 22 and the second bending section 23 are 1 cm. Preferably, the included angle between the first bending section 22 and the second bending section 23 is 155°, which is used to better match the bone wall at the lacrimal sac of the human body and facilitate the cutting of the lacrimal sac.

[0021] As a preferred solution, blades are provided on both sides of the second bending section 23, which is convenient for the attending doctor to hold the knife to cut the left and right lacrimal sacs. During the operation, there is no need to change the knife, and only by adjusting the direction and angle of the incision knife can smooth cutting be achieved.

[0022] Example 2, on the basis of Example 1, a special lacrimal sac incision knife under nasal endoscope, wherein the knife head 2 further includes a transition section 21. One end of the transition section 21 is connected to the knife handle 1 along the extending direction of the knife handle 1, and the other end is connected to the first bending section 22 and is arranged at an obtuse angle with the first bending section 22.

[0023] The transition section 21 mainly plays a transition role to avoid the insufficient cutting distance of the knife head 2 with only two bends relative to the lacrimal sac, and the transition part is convenient for observing the cutting direction and angle of the incision knife.

[0024] During implementation, the handle 1 has a cylindrical structure and is convenient for gripping. The end of the handle 1 is provided with a frustum-shaped conical surface housing 11, and the conical surface housing 11 is fixedly connected to the transition section 21. The conical surface housing 11 and the transition section 21 can be integrally connected, or the transition section 21 can be inserted into the end of the conical surface housing 11, and a hook for preventing it from falling off is provided, and the hook is fixed inside the conical surface housing 11.

[0025] During manufacturing, the length of the handle 1 is 8 - 12 cm, and a handle 1 with a length of 10 cm is preferably used. The diameter of the handle 1 is 0.5 - 0.8 cm, and a diameter of 0.6 cm is preferably used. The length of the conical surface housing 11 is 2 cm, and it is a frustum-shaped structure as a whole. The length of the transition section 21 is the same as the length of the first bent section 22, and it can also be 1 cm long. The diameter of the transition section is 0.1 cm, the diameter of the end of the conical surface housing 11 is also 0.1 cm, and the diameter of the tail is the same as the diameter of the handle 1, which is 0.6 cm.

[0026] This special lacrimal sac incision knife under nasal endoscope has an overall length of 14 - 15 cm and is comfortable to hold as a whole. The overall length of the handle 1 is 12 cm, and the diameter of the handle 1 is 0.6 cm. It can be made of plastic, or it can have a stainless steel outer shell with plastic inside and can be sterilized at high temperature. The cutting head 2 at the front end of the handle 1 is made of stainless steel metal. The cutting head 2 is divided into two parts. The part connected to the handle 1 is cylindrical with a diameter of 0.1 cm and a length of 1 cm, and it continues to extend forward and is forged into a rhombus shape, with both sides of the tip being sharpened. There are two folds in opposite directions in the cutting head 2 part, and the included angles can both be 155°. Different from the cataract puncture knife on the market which has one included angle, the advantage of this double included angle lacrimal sac incision knife in opposite directions is that it is convenient to cut the lacrimal sac along the bone wall, reducing the surgical difficulty and improving the surgical success rate.

[0027] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to this process, method, article or device. These unpublicized elements all belong to the prior art that can be known to those skilled in the art.

[0028] The specific embodiments described above further elaborate on the purpose, technical solution, and beneficial effects of the present utility model. It should be understood that the above description is only the specific embodiments of the present utility model and is not used to limit the protection scope of the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A special lacrimal sac incision knife under nasal endoscope, comprising a knife handle (1) and a knife head (2), wherein the knife head (2) is installed at the end of the knife handle (1), and is characterized in that: The cutter head (2) is provided with two bends in opposite directions. The cutter head (2) includes a first bent section (22) and a second bent section (23). The first bent section (22) is arranged at an obtuse angle with the extending direction of the knife handle (1). The first bent section (22) and the second bent section (23) are arranged at an obtuse angle. The second bent section (23) has a diamond structure.

2. The special lacrimal sac incision knife under nasal endoscope according to claim 1, wherein: The length of the first bent section (22) is the same as that of the second bent section (23). The included angle between the first bent section (22) and the second bent section (23) is between 135° and 175°.

3. The special lacrimal sac incision knife under nasal endoscope according to claim 2, wherein: Blades are provided on both sides of the second bent section (23).

4. The special lacrimal sac incision knife under nasal endoscope according to claim 3, characterized in that: The length of the second bent section (23) is 0.5 - 1.5 cm, and the width of the second bent section (23) is 0.5 - 0.8 cm.

5. The special lacrimal sac incision knife under nasal endoscope according to claim 1, characterized in that: The cutter head (2) further includes a transition section (21). One end of the transition section (21) is connected to the knife handle (1) along the extending direction of the knife handle (1), and the other end is connected to the first bent section (22) and is arranged at an obtuse angle with the first bent section (22).

6. The special lacrimal sac incision knife under nasal endoscope according to claim 5, wherein: The knife handle (1) has a cylindrical structure. A conical surface shell (11) in the shape of a frustum of a cone is provided at the end of the knife handle (1). The conical surface shell (11) is fixedly connected to the transition section (21).

7. The special lacrimal sac incision knife under nasal endoscope according to claim 6, wherein: The length of the knife handle (1) is 8 - 12 cm, and the diameter of the knife handle (1) is 0.5 - 0.8 cm; the length of the conical surface shell (11) is 2 cm; the length of the transition section (21) is the same as that of the first bent section (22), and the diameter of the transition section (21) is 0.1 cm.

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