Disposable cannula puncture knife for ophthalmology department
By designing a disposable ophthalmic cannula with reasonable structure, safe and reliable disposable ophthalmic cannula puncture knife, the existing products are solved, the problems of unsafe operation, poor self-sealing effect, inconvenient in incision positioning and measurement, and the prone to fall off of the cannula is achieved, and the effect of improving surgical efficiency and reducing surgical risks is achieved.
Patent Information
- Application Number
- CN202420478529.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-13
- Publication Date
- 2025-03-04
- Estimated Expiration
- 2034-03-13
AI Technical Summary
The existing disposable ophthalmic cannula piercing knives lack the knife body protection device, which is unsafe to operate, has poor self-sealing effect, inconvenient positioning and measurement, and the cannula is prone to fall off, which is expensive.
A disposable ophthalmic cannula piercing knife with reasonable structure, safe and reliable structure, adopting the design of a handle sleeve body and locking parts to ensure the safe expansion and contraction of the bayonet; a ruler and measuring teeth are provided on the handle for quick positioning of the incision; an anti-slip treatment area is provided on the outer wall of the cannula to enhance friction and prevent falling off.
Improve surgical efficiency, reduce surgical risks, ensure safety and accuracy of operations, avoid problems such as shedding and poor self-sealing, and reduce costs.
Smart Images
Figure CN222549470U_ABST
Abstract
Description
Technical field:
[0001] The utility model relates to the technical field of medical instruments, in particular to a disposable ophthalmic cannula puncture knife which has a reasonable structure, is safe and reliable, is beneficial to improving surgical efficiency and reducing surgical risks. Background technology:
[0002] Disposable ophthalmic cannula puncture knives are widely used in minimally invasive ophthalmic surgeries. In clinical practice, a straight-mouth puncture is made on the flat part of the sclera of the eyeball. After the operation, the pressure of the sclera of the eyeball itself can be used to make the tissue at the wound fit tightly, which is conducive to healing. This requires that the puncture knife should be sharp first to avoid tearing the wound, and the cutting position should be accurate. The disposable ophthalmic cannula puncture knives commonly used on the market currently have no knife body protection device, which can easily injure the operator, and there are problems such as poor self-sealing effect, inconvenient incision positioning and measurement, and easy shedding of the cannula. In addition, most of the existing ophthalmic puncture knives rely on imports and are expensive. In response to the problems of similar products on the market, it is imperative to develop products independently by domestic manufacturers with better use effects. Summary of the invention:
[0003] Aiming at the shortcomings and deficiencies in the prior art, the utility model provides a disposable ophthalmic cannula puncture knife which has a reasonable structure, is safe and reliable, is conducive to improving surgical efficiency, and reduces surgical risks.
[0004] The utility model achieves this through the following measures:
[0005] A disposable ophthalmic sleeve puncture knife, provided with a puncture knife, a handle, a self-closing valve, and a sleeve, characterized in that the handle has a sleeve body, the front end of the handle sleeve body is the puncture knife outlet, and the rear end of the sleeve body is provided with a guide groove, the puncture knife is placed in the sleeve body of the handle, and the puncture knife is provided with at least two locking components that cooperate with the handle, when the puncture knife is pushed along the guide groove to make the blade head of the puncture knife extend along the puncture knife outlet, the first locking component on the puncture knife abuts and locks with the limiting component in the handle sleeve body, the puncture knife is pulled along the guide groove in a direction away from the puncture knife outlet, until the blade head of the puncture knife is retracted into the handle sleeve body, and the second locking component on the puncture knife abuts and locks with the limiting component in the handle sleeve body; a ruler component is provided at the puncture knife outlet of the handle sleeve body, and the ruler component includes at least two measuring teeth.
[0006] The limiting component provided on the inner wall of the handle sleeve body of the utility model is an inner recess or a limiting boss or a limiting convex rib, and the first locking component on the puncture knife is a limiting protrusion or a limiting convex rib. Further, the first locking component is a hemispherical or conical limiting protrusion, so that when the blade head of the puncture knife is pushed out or put into the sleeve body of the handle, it can slide over the limiting component on the inner wall of the sleeve body under the action of pushing or pulling force to complete the adjustment of the relative position.
[0007] The ruler component of the utility model is provided with three measuring teeth. In order to prevent the measuring teeth from blocking the sight line, the handle tube wall corresponding to the adjacent measuring teeth is provided with a notch.
[0008] The piercing knife of the utility model comprises a knife head, a knife handle and a holding handle from front to back in sequence, and the knife handle and the inner wall of the handle are provided with matching locking components, the holding handle is fixed at the rear end of the knife handle, and the height is greater than the outer diameter of the sleeve-type main body of the handle, and the width is less than the width of the guide groove, so that it is partially exposed outside the guide groove, which is convenient for pushing or pulling operations. Further, a second locking component is provided on the holding handle, and the second locking component is an engaging groove or locking protrusion adapted to the limiting protrusion on the inner wall of the handle, thereby completing the locking of the pushing state. Further, a U-shaped groove with an open rear end is provided on the holding handle, and the side of the holding handle is provided with an engaging groove or locking protrusion adapted to the limiting protrusion on the inner wall of the handle. When it is necessary to disengage the engaging groove or locking protrusion from the limiting protrusion, the rear part of the holding handle can be squeezed to deform the holding handle, and at this time the locking component on the holding handle can be separated from the limiting protrusion on the inner wall of the handle.
[0009] The outer wall of the handle of the utility model is provided with anti-skid hemp patterns, and further, the holding handle of the piercing knife is provided with anti-skid hemp patterns.
[0010] After the sleeve and the self-closing valve are assembled, they are sleeved on the blade head of the puncture knife. The self-closing valve is provided with a cross-shaped self-closing hole. The outer wall of the sleeve is provided with an anti-slip treatment area for increasing the friction between the outer wall of the sleeve and the eyeball tissue to prevent the sleeve from slipping during surgery.
[0011] The blade head of the piercing knife of the utility model adopts a flat curved cutting edge, and the sharpness of the cutting edge is improved to the maximum extent under the premise of maintaining the strength of the blade head.
[0012] The utility model is also provided with a perfusion tube, so as to realize the perfusion operation after puncture.
[0013] When the utility model is in use, the puncture knife is installed in the handle, and the puncture knife can be telescopically movable in the handle, and the handle of the puncture knife is provided with front and rear limit devices. When in a non-working state, the puncture knife is located inside the handle, ensuring the safety of the surgical instrument. When in a workwear state, the puncture knife can be pushed out of the handle and locked at the front end, ensuring that the puncture knife will not retract when puncturing the sclera of the eyeball; an anti-falling area is provided on the outer wall of the sleeve, which increases the friction between the outer wall of the sleeve and the eyeball tissue and avoids the sleeve from falling off during the operation; a ruler component is provided at the front end of the handle, and the spacing of the ruler can be 3mm and 4mm respectively, which is used to quickly locate the distance from the edge of the iris to the puncture hole during the operation; the utility model The new self-closing valve includes a valve body made of elastic material. The upper surface of the valve body is a hemispherical surface with a cross opening on the spherical surface. When surgical instruments pass through the cross opening, the resistance is small and the surgical instruments can be completely covered to prevent leakage of fluid inside the eyeball. At the same time, after the instrument is pulled out of the cross opening, it can be quickly closed under the action of elasticity to prevent leakage of fluid inside the eyeball, thereby achieving a self-sealing effect throughout the operation. The puncture knife head adopts a curved blade structure to ensure that the puncture hole is in a "single-line" shape, and while ensuring the strength of the blade head, the sharpness of the blade is maximized, and the side blade is sharper and the transition is smoother to prevent the puncture hole from tearing.
[0014] Compared with the prior art, the utility model has good sealing performance, convenient operation, good safety performance and convenient transportation. The retractable design of the puncture knife ensures the safety of the instrument; the anti-slip design of the outer wall of the sleeve ensures that the sleeve is not easy to fall off during the operation; the design of the handle scale ensures that the puncture hole is quickly positioned during the operation, thereby improving the efficiency of the operation; the self-sealing design of the self-closing valve ensures that there is no leakage during the whole operation; the structural design of the puncture knife head ensures that the puncture hole is in a "straight" shape, and ensures the efficiency of the puncture and reduces the tearing of the incision. Description of the drawings:
[0015] Attached Figure 1 It is a structural schematic diagram of the utility model.
[0016] Attached Figure 2 It is a schematic diagram of the decomposed state of the utility model.
[0017] Attached Figure 3 It is a cross-sectional view of the present utility model.
[0018] Attached Figure 4 It is a structural schematic diagram of the piercing knife in the utility model.
[0019] Attached Figure 5 It is a schematic diagram of the puncture knife in the embodiment of the utility model.
[0020] Attached Figure 6 It is a schematic diagram of the puncture knife in the extended state in the embodiment of the utility model.
[0021] Attached Figure 7 It is a structural schematic diagram of the casing of the utility model.
[0022] Attached Figure 8 It is a structural schematic diagram of a handle in an embodiment of the utility model.
[0023] Attached Fig. 9 9(a) is a schematic diagram of the structure of the self-closing valve in the embodiment of the utility model, 9(b) is a cross-sectional view of the self-closing valve.
[0024] Attached Fig.10 10(a) is a schematic diagram of the structure of the cutter head in the embodiment of the utility model, 10(b) is a schematic diagram of the side view of the cutter head in 10(a), and 10(c) is another schematic diagram of the structure of the cutter head.
[0025] Figure numerals: handle 1, puncture knife 2, self-closing valve 3, sleeve 4, perfusion tube 5, knife head 6, knife handle 7, measuring teeth 8, holding handle 9, guide groove 10, limiting component 11, anti-slip treatment area 12, U-shaped groove 13. Specific implementation method:
[0026] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0027] As attached Figure 1 As shown, the utility model proposes a disposable ophthalmic cannula puncture knife, which is provided with a puncture knife 2, a handle 1, a self-closing valve 3, and a cannula 4. The handle 1 has a sleeve body, the front end of the handle sleeve body is the puncture knife outlet, and the rear end of the sleeve body is provided with a guide groove, the puncture knife 2 is placed in the sleeve body of the handle 1, and the puncture knife 2 is provided with at least two locking components that match the handle 1. When the puncture knife 2 is pushed along the guide groove 10 to make the blade head 6 of the puncture knife 2 extend along the puncture knife outlet, the first locking component on the puncture knife 2 abuts and locks with the limiting component 11 in the sleeve body of the handle 1, and the puncture knife 2 is pulled away from the puncture knife outlet along the guide groove. After the blade head 6 of the puncture knife 2 is received in the sleeve body of the handle 1, the second locking component on the puncture knife 2 abuts and locks with the limiting component in the sleeve body of the handle 1; a ruler component is provided at the puncture knife outlet of the sleeve body of the handle 1, and the ruler component includes at least two measuring teeth 8.
[0028] The limiting component provided on the inner wall of the sleeve body of the handle 1 of the utility model is an inner recess or a limiting boss or a limiting convex rib, and the first locking component on the puncture knife 2 is a limiting protrusion or a limiting convex rib. Further, the first locking component is a hemispherical or conical limiting protrusion, so that when the blade head of the puncture knife 2 is pushed out or put into the sleeve body of the handle 1, it can slide over the limiting component on the inner wall of the sleeve body under the action of the pushing or pulling force to complete the adjustment of the relative position.
[0029] The ruler component of the utility model is provided with three measuring teeth 8. In order to prevent the measuring teeth from blocking the line of sight, the tube wall of the handle 1 corresponding to the adjacent measuring teeth 8 is provided with a notch.
[0030] The piercing knife 2 of the utility model comprises a blade head 6, a handle 7 and a holding handle 9 from front to back, wherein the handle 7 and the inner wall of the handle 1 are provided with matching locking components, the holding handle 9 is fixed at the rear end of the handle 7, and the height is greater than the outer diameter of the sleeve body of the handle 1, and the width is less than the width of the guide groove 10, so that it is partially exposed outside the guide groove 10, which is convenient for pushing or pulling operations. Further, a second locking component is provided on the holding handle 9, and the second locking component is an engaging groove or locking protrusion adapted to the limiting protrusion on the inner wall of the handle 1, thereby completing the locking of the pushing state. Further, a U-shaped groove 13 with an open rear end is provided on the holding handle 9, and the side of the holding handle 9 is provided with an engaging groove or locking protrusion adapted to the limiting protrusion on the inner wall of the handle. When it is necessary to disengage the engaging groove or locking protrusion from the limiting protrusion, the rear part of the holding handle 9 is squeezed to deform the holding handle 9, and at this time, the locking component on the holding handle 9 can be separated from the limiting protrusion on the inner wall of the handle.
[0031] The outer wall of the handle 1 of the utility model is provided with anti-skid hemp patterns, and further, the holding handle of the puncture knife is provided with anti-skid hemp patterns.
[0032] After the sleeve 4 and the self-closing valve 3 of the utility model are assembled, they are sleeved on the blade head 6 of the puncture knife 2. The self-closing valve 3 has a cross-shaped self-closing hole. The outer wall of the sleeve 4 is provided with an anti-slip treatment area 12, which is used to increase the friction between the outer wall of the sleeve 4 and the eyeball tissue to prevent the sleeve 4 from slipping during the operation.
[0033] The blade head of the piercing knife 2 of the utility model adopts a flat curved cutting edge, and the sharpness of the cutting edge is improved to the maximum extent under the premise of maintaining the strength of the blade head.
[0034] The utility model is also provided with a perfusion tube 5, so as to realize the perfusion operation after puncture.
[0035] Embodiment 1:
[0036] This example provides a disposable ophthalmic cannula puncture knife, which is provided with a puncture knife 2, a handle 1, a self-closing valve 3, and a cannula 4. The handle 1 has a sleeve-type main body, and the handle 7 and the blade head 6 are assembled together to form the puncture knife 2. The puncture knife 2 is installed in the handle 1. After the self-closing valve 4 and the cannula 3 are assembled together, they are sleeved on the blade head 6 of the puncture knife 2.
[0037] As attached Figure 5As shown, in the factory state, the puncture knife 2 is inside the handle 1 and is locked. When in use, the puncture knife 2 is first pushed out of the handle 1 until the first locking component on the handle 7 is close to the handle limit boss. At this time, the relative position of the puncture knife 2 and the handle is locked. After the instrument is used, the rear end of the handle is pinched by hand to disengage the upper limit boss of the handle from the handle limit boss, and then the puncture knife is pulled back into the handle, and the lower limit boss of the handle is close to the handle limit boss (as shown in FIG. Figure 6 ), at this time the puncture knife is located inside the handle and is locked, thus completing the resetting;
[0038] As attached Figure 8 As shown, the outer wall of the cannula 4 in this example is partially anti-slip to increase the friction between the outer wall of the cannula 4 and the eyeball tissue to prevent the cannula from falling off during surgery; the front end of the handle 1 is provided with a distance measuring tooth 8, and the measuring distances are 3mm and 4mm respectively, which are used to quickly locate the distance from the iris edge to the puncture hole as needed during surgery, saving surgery time;
[0039] As attached Fig. 9 As shown in the figure, a "cross" incision is provided on the self-closing valve in this example to reduce the resistance when the surgical instrument passes through and to achieve sealing when the surgical instrument passes through; the "bowl-shaped" design on the upper part of the self-closing valve can utilize the elasticity of the material itself to achieve self-closing of the "cross" incision, thereby achieving a sealing effect; Fig.10 As shown, the puncture knife head adopts a curved blade structure to ensure that the puncture hole is in a "straight-line" shape. While ensuring the strength of the blade head, the sharpness of the blade is maximized, and the side blade is sharper and the transition is smoother to prevent the puncture hole from tearing.
[0040] When in use, the puncture knife 2 is installed in the handle 1, and the puncture knife 2 can be retracted and moved in the handle 1, and the handle 7 of the puncture knife 2 is provided with front and rear limit devices. When not in operation, the puncture knife 2 is located inside the handle, ensuring the safety of the surgical instrument. When in the workwear state, the puncture knife 2 can be pushed out of the handle 1 and locked at the front end, ensuring that the puncture knife 2 will not retract when puncturing the sclera of the eyeball; the outer wall of the cannula is provided with an anti-falling area to increase the friction between the outer wall of the cannula and the eyeball tissue to avoid the cannula falling off during the operation; a ruler component is provided at the front end of the handle, and the spacing of the ruler can be 3mm and 4mm respectively, which is used to quickly locate the distance from the edge of the iris to the puncture hole during surgery. The self-closing valve in the utility model includes a valve body made of elastic material, the upper surface of the valve body is a hemispherical surface, and a cross opening is arranged on the spherical surface. When the surgical instrument passes through the cross opening, the resistance is small, and the surgical instrument can be completely covered to prevent the leakage of the liquid inside the eyeball; at the same time, after the instrument is pulled out of the cross opening, it can be quickly closed under the action of elasticity to prevent the leakage of the liquid inside the eyeball, thereby achieving a self-sealing effect throughout the operation; the puncture knife head adopts a curved blade structure to ensure that the puncture hole is "straight-shaped", and on the premise of ensuring the strength of the blade head, the sharpness of the blade is maximized, and the side blade is sharper and the transition is smoother to prevent the puncture hole from tearing.
Claims
1. A disposable ophthalmic cannula puncture knife, comprising a puncture knife, a handle, a self-closing valve, and a cannula, characterized in that: The handle comprises a sleeve body, the front end of the handle sleeve body is a puncture knife outlet, and a guide groove is provided at the rear end of the sleeve body. The puncture knife is placed in the sleeve body of the handle, and the puncture knife is provided with at least two locking components that cooperate with the handle. When the puncture knife is pushed along the guide groove so that the blade head of the puncture knife extends along the puncture knife outlet, the first locking component on the puncture knife abuts and locks with the limiting component in the handle sleeve body, and the puncture knife is pulled along the guide groove in a direction away from the puncture knife outlet until the blade head of the puncture knife is retracted into the handle sleeve body, and the second locking component on the puncture knife abuts and locks with the limiting component in the handle sleeve body; a ruler component is provided at the puncture knife outlet of the handle sleeve body, and the ruler component includes at least two measuring teeth.
2. A disposable ophthalmic cannula puncture knife according to claim 1, characterized in that: The limiting component provided on the inner wall of the handle sleeve body is an inner recess or a limiting boss or a limiting convex rib, and the first locking component on the puncture knife is a limiting protrusion or a limiting convex rib. The first locking component is a hemispherical or conical limiting protrusion, so that when the blade head of the puncture knife is pushed out or put into the sleeve body of the handle, it slides over the limiting component on the inner wall of the sleeve body under the action of the pushing or pulling force.
3. A disposable ophthalmic cannula puncture knife according to claim 1, characterized in that: The scale component is provided with three measuring teeth. In order to prevent the measuring teeth from blocking the line of sight, gaps are provided on the handle tube wall corresponding to adjacent measuring teeth.
4. A disposable ophthalmic cannula puncture knife according to claim 1, characterized in that: The puncture knife includes a knife head, a knife handle, and a holding handle from front to back. The knife handle and the inner wall of the handle are provided with matching locking components. The holding handle is fixed at the rear end of the knife handle, and its height is greater than the outer diameter of the sleeve body of the handle, and its width is less than the width of the guide groove.
5. A disposable ophthalmic cannula puncture knife according to claim 4, characterized in that: The holding handle is provided with a second locking component, which is an engaging groove or a locking protrusion adapted to the limiting protrusion on the inner wall of the handle, thereby completing the locking of the pushing state.
6. A disposable ophthalmic cannula puncture knife according to claim 5, characterized in that: The holding handle is provided with a U-shaped groove with an open rear end, and the side of the holding handle is provided with an engaging groove or a locking protrusion adapted to the upper limit protrusion on the inner wall of the handle. When it is necessary to disengage the engaging groove or the locking protrusion from the limit protrusion, the rear part of the holding handle is squeezed to deform the holding handle, so that the locking part on the holding handle is separated from the limit protrusion on the inner wall of the handle.
7. A disposable ophthalmic cannula puncture knife according to claim 1, characterized in that: The outer wall of the handle is provided with anti-skid hemp patterns, and the holding handle of the piercing knife is provided with anti-skid hemp patterns.
8. The disposable ophthalmic cannula puncture knife according to claim 1, characterized in that: After the sleeve and the self-closing valve are assembled, they are sleeved on the blade head of the puncture knife. The self-closing valve is provided with a cross-shaped self-closing hole, and the outer wall of the sleeve is provided with an anti-slip treatment area.
9. A disposable ophthalmic cannula puncture knife according to claim 1, characterized in that: The blade head of the piercing knife adopts a flat curved cutting edge.
10. The disposable ophthalmic cannula puncture knife according to claim 1, characterized in that: An irrigation tube is also provided to achieve irrigation operation after puncture.