Super-bore-diameter stab knife
A bayonet and caliber technology, applied in the field of super-caliber puncture knives, can solve the problems of crack formation, slow recovery, unsatisfactory recovery, etc., and achieve the effect of easy operation, fast recovery process and small trauma
Inactive Publication Date: 2015-01-14
杨勋 +1
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Problems solved by technology
Since the core needs to pass through the inside of the sleeve, the cutting edge size of the head is usually smaller than the diameter of the sleeve. In actual operation, the diameter of the opening is often not large enough, and the sleeve will crack the sclera when inserted. Fissures form near the opening, resulting in slower or less than ideal recovery after surgery
Method used
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[0020] Specific embodiments of the present invention, such as figure 2 and image 3 Shown, a kind of ultra-diameter puncture knife comprises metal casing 1, a core that can be inserted and taken out is arranged in the casing 1, and the end of the core is the blade 2 that the incision is used, and the two sides of the blade are The side has an auxiliary blade 3 which can be bent. The total width of the blade 2 and the auxiliary blade 3 is greater than the outer diameter of the sleeve 1, and when the auxiliary blade 3 is bent, the width of the blade 2 and the auxiliary blade 3 is smaller than the inner diameter of the sleeve 1, so that the core passes through the sleeve 1 take out.
[0021] When the above-mentioned embodiment is in use, the core is first put into the casing 1 from the tail end, and the blade 2 and the auxiliary blade 3 are located outside the sleeve 1. When puncturing, the blade 2 and the auxiliary blade 3 make an incision. , after the incision is completed,...
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The invention discloses a super-bore-diameter stab knife which comprises a sleeve pipe and a core part. The head of the core part is provided with a blade part for cutting. The super-bore-diameter stab knife is characterized in that the width of the blade part is larger than the external diameter of the sleeve pipe, at least part of the blade part can be bent, and the width of the blade part is smaller than the internal diameter of the sleeve pipe in a bending state. When the super-bore-diameter stab knife is inserted into an eye, a formed cut is reasonable in dimensions, a sclera layer cannot be torn. After cutting is finished, due to the fact that the blade part is provided with the bent part, the blade part can be collected into the sleeve pipe, and the core part is taken out. The implementation process of the super-bore-diameter stab knife is basically the same as now, the super-bore-diameter stab knife is convenient to operate, wounds formed in an operation are small, and the recovery process of a patient is quick.
Description
technical field [0001] The invention relates to medical equipment, in particular to a super-diameter puncture knife used in ophthalmic surgery or other surgical operations to facilitate piercing into the scleral layer or other tissues. Background technique [0002] In ophthalmic surgery, it is often necessary to insert medical devices such as catheters into the eyes. The existing solution is usually to insert a metal cannula on the eye, and then insert the catheter through the cannula. When inserting and fixing the cannula, a small hole for passing the cannula needs to be opened on the eye. In the prior art, a technique similar to a puncture needle is usually used to pass a core opening with a blade at the head in the cannula. Hole, after the core has scratched the scleral layer, insert the cannula, and then remove the core, as figure 1 shown. Since the core needs to pass through the inside of the sleeve, the cutting edge size of its head is usually smaller than the diamet...
Claims
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IPC IPC(8): A61F9/007
Inventor 杨勋
Owner 杨勋