CN215080767U - Depth knife - Google Patents

Abstract

The utility model provides a degree of depth sword, be used for glaucoma operation, degree of depth sword includes handle of a knife and cutter body, the handle of a knife is conical portion of gripping including being cylindrical main part and connecting in main part one end, main part and the integrated into one piece of portion of gripping, the one end that the main part kept away from the portion of gripping is equipped with the breach, be used for preventing when the operation that the incision is rolled or package bayonet socket, the cutter body includes connecting portion and cutting edge portion, the one end that the main part was kept away from to connecting portion and the portion of gripping is connected, the central line of connecting portion and the coincidence of the central line of handle of a knife, cutting edge portion includes cutting edge main part and cutting edge, cutting edge main part lower extreme has the straight face of benchmark positioning effect together, cutting edge extends downwards from the front end of cutting edge main part, be used for cutting the conjunctiva, the cutting position of cutting edge is 0.3mm-0.5mm with the difference in height of straight face. The depth of cut sword cutting depth of this application is fixed and accurate.

Description

Depth knife

Technical Field

The application relates to the technical field of medical equipment, in particular to a depth knife.

Background

Glaucoma (glaucoma) is a group of diseases characterized by atrophy and depression of the optic papilla, visual field loss and visual deterioration, pathological increased intraocular pressure and insufficient blood supply to the optic nerve are primary risk factors of the onset of the glaucoma, and the tolerance of the optic nerve to pressure damage is also related to the occurrence and development of the glaucoma. Obstruction of any ring in the aqueous humor circulatory pathway can lead to pathological changes caused by elevated intraocular pressure, but some patients also present with normal tension glaucoma. Glaucoma is one of three major blinding diseases causing blindness in humans, with a total incidence of 1% and 2% after age 45. Clinically, glaucoma is classified into three major categories, primary, secondary and congenital, according to etiology, angle of the atrium, tonography and the like.

In the existing glaucoma surgery, a region with a preset depth is usually required to be scribed on a conjunctiva, and then the dissection is carried out along a certain direction by a cutter, but in the scribing process, the depth is completely operated by a doctor through experience, and is easy to be too deep or too shallow, so that the surgery effect is influenced, and the scribing region and the dissection are the same cutter.

SUMMERY OF THE UTILITY MODEL

The application provides a degree of depth sword to solve the uncontrollable problem of the in-process degree of depth of cutting the conjunctiva among the prior art.

In order to solve the technical problem, the application adopts a technical scheme that: the utility model provides a depth knife, be used for glaucoma operation, depth knife includes handle of a knife and cutter body, the handle of a knife is including being cylindrical main part and connecting and be conical portion of gripping in main part one end, main part and the integrated into one piece of portion of gripping, the one end that the main part kept away from the portion of gripping is equipped with the breach, a use for preventing depth knife roll or package bayonet when the operation, the cutter body includes connecting portion and cutting edge portion, the connecting portion is connected with the one end that the main part was kept away from to the portion of gripping, the central line of connecting portion and the coincidence of the central line of handle of a knife, cutting edge portion includes cutting edge main part and cutting edge, cutting edge main part lower extreme has the straight face of benchmark positioning action together, cutting edge extends downwards from the front end of cutting edge main part, a use for cutting the conjunctiva, the cutting position of cutting edge is 0.3mm-0.5mm with the difference in height of straight face.

Wherein the cutting edge is of a olecranon type and is in point contact with the conjunctiva.

The width of the cutting edge is smaller than that of the blade body, and the width of the cutting edge gradually decreases towards the direction far away from the blade body.

Wherein, the included angle between the central line of the connecting part and the straight surface is more than 90 degrees.

Wherein, the included angle between the central line of the connecting part and the straight surface is within 150 degrees.

Wherein the length of the straight surface is 2mm-5 mm.

Wherein the width of the flat surface is 0.2mm-0.5 mm.

Wherein, the junction of cutting edge main part and connecting portion adopts the radius angle to link up.

The beneficial effect of this application is: be different from prior art's condition, this application provides a degree of depth sword, this degree of depth sword is through setting up the straight face that plays benchmark locate action for the degree of depth sword is when the cutting, and the degree of depth of cutting is fixed, thereby avoids needing to rely on the doctor among the prior art to rely on the experience to hold the condition of the too dark or the too shallow that the depth of cut caused, and the depth of depth sword depth of cut of this application is fixed and accurate.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the application, the drawings that are needed to be used in the description of the embodiments are briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without inventive efforts, wherein:

FIG. 1 is a perspective view of an embodiment of a depth knife of the present application;

FIG. 2 is an enlarged schematic view of a portion A of the depth knife shown in FIG. 1;

FIG. 3 is a perspective view of another embodiment of a depth knife of the present application;

FIG. 4 is an enlarged schematic view of a portion B of the depth knife shown in FIG. 3;

FIG. 5 is a perspective view of another embodiment of a depth knife of the present application;

fig. 6 is an enlarged structural view of a portion C of the depth knife shown in fig. 5.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any inventive step based on the embodiments in the present application, are within the scope of protection of the present application.

Referring to fig. 1-6, fig. 1 is a schematic view of a depth knife according to an embodiment of the present disclosure; FIG. 2 is an enlarged schematic view of a portion A of the depth knife shown in FIG. 1; FIG. 3 is a perspective view of another embodiment of a depth knife of the present application; FIG. 4 is an enlarged schematic view of a portion B of the depth knife shown in FIG. 3; FIG. 5 is a perspective view of another embodiment of a depth knife of the present application; fig. 6 is an enlarged structural view of a portion C of the depth knife shown in fig. 5. In this embodiment, the utility model provides a deep knife includes handle 10 and cutter body 20, handle 10 includes the body portion 11 that is the cylindricality and connects the portion 12 that holds that the one end of body portion 11 is the toper, body portion 11 and the portion 12 are integrated into one piece, the one end of body portion 11 far away from the portion 12 is equipped with breach 13, be used for preventing deep knife roll or package bayonet socket when operating, cutter body 20 includes connecting portion 21 and cutting edge portion 22, connecting portion 21 is connected with the portion 12 that holds the portion 12 and keeps away from the one end of body portion 11, the central line of connecting portion 21 and the central line of handle 10 coincide, cutting edge portion 22 includes cutting edge main part 221 and cutting edge 222, cutting edge main part 221 lower extreme has the straight face of benchmark location effect together, cutting edge 222 extends downwards from the front end of cutting edge main part 221, be used for cutting the conjunctiva, the height difference of cutting edge 222 and straight face is 0.3mm-0.5 mm. More preferably, the height difference is 0.4 mm. Wherein the cutting site refers to a site where direct contact cutting of the conjunctiva is performed.

Preferably, the cutting edge 222 is an olecranon type, and the cutting edge 222 makes point contact with the conjunctiva. Point contact can make the conjunctiva easier to cut than surface contact, and the rigidity is good.

Preferably, the width of the cutting edge 222 is smaller than that of the blade body 221, and the width of the cutting edge 222 gradually decreases in a direction away from the blade body 221. The thinner the cutting edge 222, the more favorable the cutting.

Preferably, the included angle α between the center line of the connecting portion 21 and the flat surface is 90 ° or more, and the included angle α between the center line of the connecting portion 21 and the flat surface is 150 ° or less. More preferably, the included angle α is within 120 °, and by skillfully arranging the cutter body 20 within the angle range, the view angle of the doctor during cutting is larger, and the force required during cutting is smaller.

Wherein the length of the straight surface is 2mm-5 mm. The flat surface has a width of 0.2mm to 0.5mm, more preferably, a width of 0.36 mm. The conjunctiva is a curved surface, and the length of the conjunctiva can be matched with a positioning plane during conjunctiva cutting, so that if the length is too large, an area with a fixed depth and a preset length cannot be cut, and if the length is too small, a doctor cannot perform a positioning function during the use of the depth knife. The width can ensure the strength of the cutter body 20, meet the requirements of the processing technology, and avoid the conditions that the strength is large, but the cutter body is difficult to process, or the cutter body is easy to process but the strength is small.

Wherein, the connection part of the blade body 221 and the connection part 21 is connected by a fillet. The rounded corners avoid the sharp cutting edges from injuring the conjunctiva or other parts of the eye, and the radius of the rounded corners is preferably larger than 2 mm.

The beneficial effect of this application is: be different from prior art's condition, this application provides a degree of depth sword, this degree of depth sword is through setting up the straight face that plays benchmark locate action for the degree of depth sword is when the cutting, and the degree of depth of cutting is fixed, thereby avoids needing to rely on the doctor among the prior art to rely on the experience to hold the condition of the too dark or the too shallow that the depth of cut caused, and the depth of depth sword depth of cut of this application is fixed and accurate.

It should be noted that if directional indications (such as up, down, left, right, front, and back … …) are referred to in the embodiments of the present application, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present application, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present application.

The above embodiments are merely examples and are not intended to limit the scope of the present disclosure, and all modifications, equivalents, and flow charts using the contents of the specification and drawings of the present disclosure or those directly or indirectly applied to other related technical fields are intended to be included in the scope of the present disclosure.

Claims (8)

1. A deep knife for glaucoma surgery is characterized in that the deep knife comprises a knife handle and a knife body, the knife handle comprises a cylindrical main body part and a tapered holding part connected with one end of the main body part, the main body part and the holding part are integrally formed, one end of the main body part, which is far away from the holding part, is provided with a notch, used for preventing the deep knife from rolling or packaging a bayonet in the operation, the knife body comprises a connecting part and a knife edge part, the connecting part is connected with one end of the holding part far away from the main body part, the central line of the connecting part is superposed with the central line of the knife handle, the blade part comprises a blade body and a cutting edge, the lower end of the blade body is provided with a flat surface which has a reference positioning function, the cutting edge extends downwards from the front end of the blade body, the height difference between the cutting part of the cutting edge and the straight surface is 0.3mm-0.5 mm.

2. The deep knife of claim 1, wherein the cutting edge is an olecranon type, and the cutting edge makes point contact with the conjunctiva.

3. The depth knife of claim 2, wherein the cutting edge has a width less than the width of the blade body, the width of the cutting edge decreasing away from the blade body.

4. A depth knife according to any of claims 1 to 3, wherein the centre line of the connecting portion makes an angle of 90 ° or more with the flat surface.

5. The depth knife of claim 4, wherein the centerline of the connecting portion is within 150 ° of the straight surface.

6. The depth knife of claim 1, wherein the flat surface has a length of 2mm to 5 mm.

7. A depth knife according to claim 6, wherein the width of the flat surface is 0.2mm-0.5 mm.

8. The depth knife of claim 1, wherein the junction of the blade body and the connecting portion is rounded.

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