CN220477612U - Percutaneous lung puncture needle - Google Patents

Abstract

The percutaneous pulmonary puncture needle comprises an outer sleeve and a puncture needle tube, wherein a fixed tube is fixed at the upper end of the outer sleeve, a movable tube capable of moving up and down is sleeved on the fixed tube, a spring is arranged in the fixed tube, the lower end of the spring is propped against the fixed tube, and the upper end of the spring is propped against the movable tube; the lower end of the movable tube is provided with a limiting step protruding radially inwards, and the outer tube wall of the fixed tube is provided with a limiting protruding ring protruding radially outwards from top to bottom; when the movable pipe moves downwards to the bottom dead center, the limiting step on the movable pipe abuts against the limiting protruding ring on the lower side, and when the movable pipe moves upwards to the top dead center, the limiting step on the movable pipe abuts against the limiting protruding ring on the upper side; the upper end of the puncture needle tube is fixedly provided with a handle, the handle is a tube body, the tube orifice at the lower end of the handle is in butt joint with the tube orifice at the upper end of the puncture needle tube, the lower end of the handle is propped against the upper end of the movable tube, a piston is arranged in a tube cavity of the handle, a push rod is fixedly arranged on the piston, and the upper end of the push rod upwards extends out of the tube orifice at the upper end of the handle.

Description

Percutaneous lung puncture needle

Technical Field

The utility model relates to the technical field of medical instruments, in particular to a percutaneous lung puncture needle.

Background

In clinical diagnosis and treatment work, percutaneous lung biopsy under CT guidance is a valuable diagnosis technology, and can puncture tumors and sarcoidosis close to or approaching the pleura to obtain pathological results, and provide valuable pathological diagnosis basis for lung focus directly. When the existing percutaneous lung puncture needle is used, a doctor cannot limit the needle insertion depth of the puncture needle, and if the needle insertion is too deep, pneumothorax of a patient can be caused; if the needle is too shallow, the ideal lung focus tissue can not be penetrated, the penetration difficulty is high, the sampling depth of the lung focus tissue is difficult to control after penetration, the problems of too deep sampling and too shallow sampling exist, and the sampling of the focus tissue is easy to drop out when the puncture needle tube is pulled out due to the smooth tube wall of the puncture needle tube, so that the sampling failure is caused.

Disclosure of Invention

Aiming at the defects in the prior art, the utility model aims to provide the percutaneous pulmonary puncture needle which can control the puncture needle depth and the sampling depth and can prevent the sampling of focus tissues from falling out of the puncture needle tube.

In order to solve the technical problems, the percutaneous pulmonary puncture needle provided by the utility model comprises an outer sleeve and a puncture needle tube, and is characterized in that:

the upper end of the outer sleeve is fixed with a fixed pipe, a movable pipe capable of moving up and down is sleeved on the fixed pipe, a spring is arranged in the fixed pipe, the lower end of the spring is propped against the fixed pipe, and the upper end of the spring is propped against the movable pipe; the lower end of the movable tube is provided with a limiting step protruding radially inwards, and the outer tube wall of the fixed tube is provided with a limiting protruding ring protruding radially outwards from top to bottom; when the movable pipe moves downwards to the bottom dead center, the limiting step on the movable pipe abuts against the limiting protruding ring on the lower side, and when the movable pipe moves upwards to the top dead center, the limiting step on the movable pipe abuts against the limiting protruding ring on the upper side;

the puncture needle tube passes through the movable tube and the fixed tube in a movable fit manner and then extends into the outer sleeve; the upper end of the puncture needle tube is fixedly provided with a handle, the handle is a tube body, the tube orifice at the lower end of the handle is in butt joint with the tube orifice at the upper end of the puncture needle tube, the lower end of the handle is propped against the upper end of the movable tube, a piston is arranged in a tube cavity of the handle, a push rod is fixedly arranged on the piston, and the upper end of the push rod extends out of the tube orifice at the upper end of the handle upwards;

the outer tube wall of the outer tube is sleeved with a puncture limiting ring capable of moving up and down, and the puncture limiting ring is provided with a locking bolt for locking the puncture limiting ring on the outer tube.

According to the percutaneous lung puncture needle provided by the utility model, the puncture depth of the outer sleeve is limited through the puncture limiting ring, the puncture needle penetration depth can be controlled, the puncture needle penetration is prevented from being too deep and too shallow, the sampling depth of focus tissues of the lung is controlled through the cooperation of the limiting step on the movable tube and the limiting protruding ring on the fixed tube, the sampling is prevented from being too deep and too shallow, the focus tissues can be still sampled and left in the puncture needle tube by utilizing the suction force generated by the piston, and the focus tissues are prevented from being sampled and dropped out of the puncture needle tube.

Drawings

Fig. 1 is a schematic view showing the structure of a percutaneous pulmonary puncture needle according to an embodiment of the utility model.

Detailed Description

The following description of the embodiments of the present utility model is provided in detail, but the embodiments are not limited to the embodiments, and all the similar structures and similar variations using the present utility model should be included in the protection scope of the present utility model, and the reference numerals in the present utility model indicate the relationships.

As shown in fig. 1, a percutaneous pulmonary puncture needle provided by an embodiment of the present utility model includes an outer cannula 1 and a puncture needle tube 2;

the upper end of the outer sleeve 1 is fixed with a fixed pipe 4, a movable pipe 5 capable of moving up and down is sleeved on the fixed pipe 4, a spring 41 is arranged in the fixed pipe 4, the lower end of the spring 41 is propped against the fixed pipe 4, and the upper end of the spring 41 is propped against the movable pipe 5; the lower end of the movable tube 5 is provided with a limit step 51 protruding radially inwards, and the outer tube wall of the fixed tube 4 is provided with a limit protruding ring 42 protruding radially outwards up and down; when the movable pipe 5 moves downwards to the bottom dead center, the limiting step 51 on the movable pipe abuts against the limiting protruding ring 42 on the lower side, and when the movable pipe 5 moves upwards to the top dead center, the limiting step 51 on the movable pipe abuts against the limiting protruding ring 42 on the upper side;

the puncture needle tube 2 passes through the movable tube 5 and the fixed tube 4 in a movable fit manner and then extends into the outer sleeve; the upper end of the puncture needle tube 2 is fixedly provided with a handle 3, the handle 3 is a tube body, the lower end tube orifice of the handle 3 is in butt joint with the upper end tube orifice of the puncture needle tube 2, the lower end of the handle 3 is propped against the upper end of the movable tube 5, a piston 31 is arranged in the tube cavity of the handle 3, a push rod 32 is fixedly arranged on the piston 31, and the upper end of the push rod 32 extends upwards out of the upper end tube orifice of the handle 3;

the outer tube wall of the outer tube 1 is sleeved with a puncture limiting ring 6 capable of moving up and down, and the puncture limiting ring 6 is provided with a locking bolt for locking the puncture limiting ring 6 on the outer tube.

The application method of the embodiment of the utility model is as follows:

before use, the percutaneous puncture depth is predicted, and the puncture limiting ring 6 is fixed at the corresponding position of the puncture needle outer sleeve 1 according to the prediction result; in the initial state, the lower end of the puncture needle tube 2 is retracted into the outer sleeve 1, the fixed tube 4 is held by hands during puncture, the outer sleeve 1 is penetrated downwards into a part of a patient to be punctured through a preset path until the puncture limiting ring 6 contacts the skin of the patient, at the moment, under the limiting action of the puncture limiting ring 6, the outer sleeve 1 stops puncturing, and at the moment, the lower end of the outer sleeve 1 is just contacted with focus tissues; then the handle 3 is pushed downwards, the handle 3 drives the movable tube 5 and the puncture needle tube 2 to move downwards, after the movable tube 5 moves to a lower dead point, a limit step 51 at the lower end of the movable tube 5 abuts against a limit protruding ring 42 at the lower side, at the moment, the movable tube 5, the puncture needle tube 2 and the handle 3 stop moving downwards, at the moment, the lower end of the puncture needle tube 2 stretches out of the outer sleeve 1, the puncture needle tube 2 pierces focus tissues, sampling of focus tissues is achieved by utilizing the lumen of the puncture needle tube 2, then the push rod 32 is pulled to enable the piston 31 to move upwards, focus tissues are left in the lumen of the puncture needle tube 2 through suction generated by the piston, at the moment, the handle 3 is released, the movable tube 5 rebounds to the original position under the action of the elasticity of the spring 41, the lower end of the puncture needle tube 2 carries the focus tissues to retract into the lumen of the outer sleeve 1, and then the whole percutaneous lung puncture needle is pulled upwards, and sampling of focus tissues can be completed.

Claims (1)

1. The utility model provides a percutaneous lung pjncture needle, includes outer tube and puncture needle tubing, its characterized in that:

the upper end of the outer sleeve is fixed with a fixed pipe, a movable pipe capable of moving up and down is sleeved on the fixed pipe, a spring is arranged in the fixed pipe, the lower end of the spring is propped against the fixed pipe, and the upper end of the spring is propped against the movable pipe; the lower end of the movable tube is provided with a limiting step protruding radially inwards, and the outer tube wall of the fixed tube is provided with a limiting protruding ring protruding radially outwards from top to bottom; when the movable pipe moves downwards to the bottom dead center, the limiting step on the movable pipe abuts against the limiting protruding ring on the lower side, and when the movable pipe moves upwards to the top dead center, the limiting step on the movable pipe abuts against the limiting protruding ring on the upper side;

the puncture needle tube passes through the movable tube and the fixed tube in a movable fit manner and then extends into the outer sleeve; the upper end of the puncture needle tube is fixedly provided with a handle, the handle is a tube body, the tube orifice at the lower end of the handle is in butt joint with the tube orifice at the upper end of the puncture needle tube, the lower end of the handle is propped against the upper end of the movable tube, a piston is arranged in a tube cavity of the handle, a push rod is fixedly arranged on the piston, and the upper end of the push rod extends out of the tube orifice at the upper end of the handle upwards;

the outer tube wall of the outer tube is sleeved with a puncture limiting ring capable of moving up and down, and the puncture limiting ring is provided with a locking bolt for locking the puncture limiting ring on the outer tube.