Medical implement

Abstract

The invention is aimed to provide a medical implement capable of variably keeping a certain length in a puncturing needle to be projected, and securely projecting the puncturing needle from the top of even a curved catheter. This medical implement comprises an inner tube catheter 11 with the puncturing needle 1 attached to the top, an outer tube catheter 12 which houses at least a part of the inner tube catheter 11, allowing it to move back and forth therein, a cylindrical body 2 fixed on the rear end of the inner tube catheter 11, an enclosure 5 which houses the cylindrical body 2, allowing it to move back and forth therein, and an adjustment mechanism 9 which variably adjusts the stroke length of the cylindrical body 2. When the cylindrical body 2 is moved backward, the puncturing needle 1 is housed in the outer tube catheter 12. When the cylindrical body 2 is moved forward, the puncturing needle 1 is projected from the outer tube catheter 12. The projection length of the puncturingneedle 1 can be variably adjusted by the adjustment mechanism 9.

Description

Technical field [0001] The invention involves a medical appliance. Background technique [0002] In order to inject the medicinal liquid into the affected part of the body cavity, the public knows that there is a piercing needle from the endoscopy to insert the injection needle to pest into the affected area, so as to inject the patent literature (such as patent literature 1).As described below as the structure of this injection needle.(A) There is an inner tube probe with a puncture needle on the front end. The inner tube probe has a cavity of a medicinal liquid flow, and an internal grip is installed on the back end.Acupuncture is in the inner cavity, and the external grip of the inner grip of the inner tube with the front end of the inner tube probe from the inner tube, and the position of the position that is used to determine the front and rear sliding needlesContact positioning surface composition. [0003] In order to make the front end of the puncture needle protruding fr...

AI Technical Summary

Problems solved by technology

[0004] However, since the length of the protruding puncture needle is constant in this type of medical instrument, there is a problem that when changing the position to be used or directly changing the protruding length of the puncture needle according to the patient's condition Under this condition, additional protruding length medical devices must be prepared

[0007] As a common problem of these medical instruments, there is the following problem: whether the puncture needle is in the state of being accommodated in the inner cavity of the outer tube probe or protruding, it is difficult to judge at once, and the inner handle and the outer handle are the same color In the case of

[0008] In addition, in the type of adjusting the protruding length, it has been known empirically that due to the difference in the degree of bending and the number of bending parts of the probe, the phenomenon to be avoided in the structure as follows occurs, that is, due to the double-folding of the probe. structure, therefore, according to the accumulation of tiny bends of the inner cylinder probe in the outer cylinder probe caused by the gap between the outer cylinder probe and the inner cylinder probe, and the frictional resistance between the outer cylinder probe and the inner cylinder probe, in The protruding length of the puncture needle confirmed before the endoscope is inserted is different from the actual protruding length during puncture. Especially when the tip of the endoscope is greatly bent, a discrepancy between the outer tube probe and the inner tube probe may occur. The frictional resistance of the needle is extremely large and the puncture needle does not protrude.

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