CN211213416U - Percutaneous renal puncture guiding needle - Google Patents

Abstract

The utility model provides a percutaneous nephrocentesis guide needle, which comprises a needle sheath and a needle core, wherein the needle core is arranged in the needle sheath in a penetrating way, the needle sheath is a hollow tube with a cylindrical shape, the head part of the needle sheath is concave towards a central shaft and is funnel-shaped, and the tail part of the needle sheath is provided with a needle drawing interface; the head of the stylet is sleeved with a positioning ball at a position away from the needle point fixing position, the positioning ball is fixedly connected with the stylet, the outer diameter of the positioning ball is smaller than the inner diameter of the needle sheath and larger than the minimum inner diameter of the funnel-shaped head of the needle sheath, and the positioning ball is positioned in the needle sheath; the outer surface of the needle sheath is provided with a graduated scale, the graduated scale is the edge line of a plurality of grooves arranged on the outer surface of the needle sheath, and the length of the grooves on the outer surface of the needle sheath is more than half of the perimeter of the cross section of the needle sheath. The distance of the needle core of the percutaneous nephrocentesis guiding needle extending out of the head part of the needle sheath is fixed, so that the needle point of the needle core can be clearly developed under ultrasound by being pulled back and forth; meanwhile, the arrangement of the groove can indicate scales and can also enable the needle sheath to develop under ultrasound.

Description

Percutaneous renal puncture guiding needle

Technical Field

The utility model belongs to the technical field of medical instrument, especially, relate to a percutaneous kidney puncture guide needle.

Background

Nephrostomy is a method of diversion of high urinary flow, which is itself a separate operation and is sometimes applied after other renal operations such as pyeloplasty. Nephrostomy is an emergency procedure in cases of pyopyelia. At present, due to the development of an endoscopic technology of the urology surgery, nephrostomy is developed from the solution of renal pelvis drainage to percutaneous nephrostomy for lithotripsy and lithotomy. The traditional percutaneous nephroscope and ureteroscope lithotripsy can treat various calculi, can treat various urinary system calculi by combining ultrasonic steam pressure trajectory, holmium laser and other lithotripsy technologies, and is a promising method for treating urinary system calculi; the key of treatment is the establishment of a puncture channel, and the establishment of a good puncture channel is half of the success of the operation. The kidney puncture mainly has two modes of X-ray guide and ultrasonic guide, and the ultrasonic guide has unique advantages of low price, convenience, no ray damage, capability of observing the kidney shape in real time at multiple angles and capability of observing the blood flow condition in the kidney. The purpose of puncture is to remove stones to the maximum extent and avoid damaging the kidney and surrounding organs, so the selection of puncture needles is important. The puncture needle needs to have minimum damage to the kidney, but the percutaneous renal puncture guiding needle used clinically at present is difficult to control the depth during puncture, the puncture needle tip is difficult to position under ultrasound, and the problems of puncture failure, postoperative bleeding during operation and the like are easily caused. After puncture is finished, the needle sheath is difficult to position and is difficult to observe in the drainage process.

For example, the chinese patent application No. 2012201087850, filing date 2012/03/22, discloses a spring type percutaneous nephrolithotomy needle, which comprises a needle core and a needle sheath, wherein the needle core penetrates into the needle sheath, a pressing cap is arranged at the tail end of the needle core, a spring, a retaining ring and a chuck are sequentially arranged in the pressing cap from bottom to top, a convex rib matched with the retaining ring is arranged on the inner wall of the pressing cap, the tail end of the needle core is inserted into the spring, the top of the tail end of the needle core is connected with the lower end of the chuck, and a limit table matched with the pressing cap is arranged at the tail end of the needle sheath. Although it can help the surgeon to determine the position of the needle tip of the puncture needle more easily during the operation, it is easy to drive the needle sheath to move during the process of pressing the spring, and the kidney of the patient may be injured. Also, when the sheath remains stationary after withdrawal of the core, it is not well visualized under ultrasound.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved is as follows: aiming at the defects of difficult positioning, difficult development and the like existing in the existing percutaneous nephrocentesis, the utility model provides a percutaneous nephrocentesis guiding needle, the distance of the needle core of the percutaneous nephrocentesis guiding needle extending out of the head part of a needle sheath is fixed, so the needle point of the needle core can be clearly developed under ultrasound by pulling back and forth; meanwhile, the arrangement of the groove can indicate scales and can also enable the needle sheath to develop under ultrasound.

The technical scheme is as follows: a percutaneous nephropuncture guide needle comprises a needle sheath and a needle core, wherein the needle core is arranged in the needle sheath in a penetrating manner, the needle sheath is a hollow tube in a cylindrical shape, the head of the needle sheath is recessed towards a central shaft to form a funnel shape, and the tail of the needle sheath is provided with a needle drawing interface; the head of the stylet is sleeved with a positioning ball at a position away from the needle point fixing position, the positioning ball is fixedly connected with the stylet, the outer diameter of the positioning ball is smaller than the inner diameter of the needle sheath and larger than the minimum inner diameter of the funnel-shaped head of the needle sheath, and the positioning ball is positioned in the needle sheath; the outer surface of the needle sheath is provided with a graduated scale, the graduated scale is the edge line of a plurality of grooves arranged on the outer surface of the needle sheath, and the length of the grooves on the outer surface of the needle sheath is more than half of the perimeter of the cross section of the needle sheath.

The cross section of the groove is triangular, rectangular or U-shaped, the distance between two edge lines on the outer surface of the needle sheath is 1mm or 2mm, and the distance between two adjacent edge lines between two adjacent grooves is 1mm or 2 mm.

The depth of the groove is half of the thickness of the tube wall of the needle sheath.

The outer ring of the tail part of the needle sheath is provided with an auxiliary end part, and the shape of the auxiliary end part is circular, oval or rectangular.

The tail of the needle core is provided with cylindrical blocks which are arranged in a ladder shape, the outer diameter of the cylindrical block positioned at the outermost end is the largest, and the outer circumference of the cylindrical block positioned at the outermost end is provided with vertical bar-shaped threads.

The needle core is made of stainless steel.

Has the advantages that: the utility model provides a percutaneous kidney puncture guide needle has following beneficial effect:

1. the longest distance that the needle core of the percutaneous nephrocentesis guiding needle extends out of the head part of the needle sheath is fixed, so that the needle point of the needle core can be clearly developed under ultrasound by being pulled back and forth;

2. the groove on the needle sheath can be used for indicating scales and displaying the length of the needle sheath inserted into a human body, and can also be used as a reflecting surface of ultrasonic waves, so that the needle sheath can be developed under ultrasonic waves when being in the human body, and the observation of the position of the needle sheath can be continued after the needle core is pulled out;

3. the funnel-shaped head of the needle sheath can facilitate the needle sheath to better penetrate into the skin and the kidney of the human body along with the needle core, and the injury to the skin and the kidney is small.

Drawings

Fig. 1 is a schematic view of the percutaneous renal puncture guiding needle of the present invention.

Fig. 2 is a schematic view of the stylet of the present invention.

Fig. 3 is a schematic view of the needle sheath of the present invention.

In the figure: 1. a needle sheath; 2. a needle core; 3. a needle drawing interface; 4. a needle tip; 5. a positioning ball; 6. a graduated scale; 7. a groove; 8. an auxiliary end portion; 9. a cylindrical block; 10. vertical bar-shaped screw threads.

Detailed Description

The following embodiments are further described with reference to the drawings.

Example 1

As shown in fig. 1, 2 and 3, the present embodiment provides a percutaneous nephrocentesis guiding needle, which includes a needle sheath 1 and a needle core 2, wherein the needle core 2 is inserted into the needle sheath 1, the needle sheath 1 is a hollow tube with a cylindrical shape, the head of the needle sheath is recessed towards a central axis and presents a funnel shape, and the tail of the needle sheath 1 is provided with a needle drawing port 3; the position, which is away from the needle point 4, of the head of the needle core 2 is sleeved with a positioning ball 5, the positioning ball 5 is fixedly connected with the needle core 2, the outer diameter of the positioning ball 5 is smaller than the inner diameter of the needle sheath 1 and larger than the minimum inner diameter of the funnel-shaped head of the needle sheath 1, and the positioning ball 5 is positioned in the needle sheath 1; the outer surface of the needle sheath 1 is provided with a graduated scale 6, the graduated scale 6 is the edge line of a plurality of grooves 7 arranged on the outer surface of the needle sheath 1, and the length of the grooves 7 on the outer surface of the needle sheath 1 is more than half of the perimeter of the cross section of the needle sheath 1.

When puncture is needed, the stylet 2 penetrates into the needle sheath 1, when the positioning ball 5 is abutted against the head of the needle sheath 1, the positioning ball 5 is just blocked in the needle sheath 1 due to the funnel-shaped head of the needle sheath 1, so that the longest distance of the stylet 2 extending out of the head of the needle sheath 1 is fixed, and the needle point 4 can be clearly developed under ultrasound by being pulled back and forth without damaging the kidney. The funnel-shaped head of the needle sheath 1 can facilitate the needle sheath 1 to better penetrate into the skin and the kidney of a human body along with the needle core 2, and the damage to the skin and the kidney is small. The groove 7 on the needle sheath 1 can be used for indicating scales and displaying the length of the needle sheath 1 inserted into a human body, and can also be used as a reflecting surface of ultrasonic waves, so that the needle sheath 1 can be developed under ultrasonic waves when being in the human body, and the observation of the position of the needle sheath 1 is continued after the needle core is pulled out. The length of the groove 7 is greater than half the circumference of the cross-section of the sheath 1 so that the groove 7 in the sheath 1 is ultrasonically detectable regardless of the rotation of the sheath 1 to the side of the sheath opposite the ultrasound exposure.

Preferably, the grooves 7 have a triangular, rectangular or U-shaped cross section, and the distance between two edge lines on the outer surface of the needle sheath 1 is 1mm or 2mm, and the distance between two adjacent edge lines between two adjacent grooves 7 is 1mm or 2 mm. The distance between two edge lines of the grooves 7 on the outer surface of the needle sheath 1 is represented by a, the distance between two adjacent edge lines of two adjacent grooves 7 is represented by b, and when a and b are both 1mm, the two edge lines of each groove 7 form a graduated scale 6 with the unit of 1 mm; when a and b are both 2mm, the two edge lines of each groove 7 form a graduated scale 6 with 2mm as a unit; when a is 1mm and b is 2mm, the two edge lines of each groove 7 form a graduated scale 6 with the interval of 1mm and 2mm as a unit; when a is 2mm and b is 1mm, the scale 6 is also formed at intervals of 1mm and 2 mm. In addition, the outer surface of the sheath 1 is marked with a number, also indicated by a groove other than groove 7, per 10mm of scale, and the depth of insertion of the sheath 1 into the body can be determined by viewing the scale on the sheath 1 exposed to the outside of the body.

Preferably, the depth of the groove 7 is half of the wall thickness of the needle sheath 1. This ensures the strength of the wall of the sheath 1.

Preferably, the outer ring of the tail part of the needle sheath 1 is provided with an auxiliary end part 8, and the shape of the auxiliary end part 8 is circular, oval or rectangular. The provision of the auxiliary end portion 8 facilitates the taking of the stylet 1 and provides assistance when the stylet 2 is drawn back and forth and pulled out.

Preferably, the tail part of the stylet 2 is provided with cylindrical blocks 9 which are arranged in a ladder shape, the outer diameter of the cylindrical block 9 positioned at the outermost end is the largest, and the outer circumference of the cylindrical block 9 at the outermost end is provided with a vertical bar-shaped thread 10. The setting of cylinder piece 9 conveniently takes nook closing member 2, and the setting of vertical bar shape screw thread 10 increases frictional force, conveniently takes nook closing member 2 equally and takes nook closing member 2 out from needle sheath 1.

Preferably, the core 2 is made of stainless steel. The stainless steel material enables the stylet 2 to be developed under ultrasound.

The embodiments of the present invention have been described in detail, and to those skilled in the art, according to the idea of the embodiments of the present invention, there are changes in the specific implementation and application range, and in summary, the content of the present specification should not be understood as the limitation of the present invention.

Claims (6)

1. The utility model provides a percutaneous nephrocentesis guide needle, includes pin sheath (1) and nook closing member (2), and the nook closing member (2) is worn to establish in pin sheath (1), its characterized in that: the needle sheath (1) is a cylindrical hollow tube, the head of the needle sheath is recessed towards the central shaft and is funnel-shaped, and the tail of the needle sheath (1) is provided with a needle drawing interface (3); the needle core (2) is characterized in that a positioning ball (5) is sleeved at a position, away from a needle point (4), of the head of the needle core (2), the positioning ball (5) is fixedly connected with the needle core (2), the outer diameter of the positioning ball (5) is smaller than the inner diameter of the needle sheath (1) and larger than the minimum inner diameter of the funnel-shaped head of the needle sheath (1), and the positioning ball (5) is positioned in the needle sheath (1); the outer surface of the needle sheath (1) is provided with a graduated scale (6), the graduated scale (6) is the edge line of a plurality of grooves (7) arranged on the outer surface of the needle sheath (1), and the length of the grooves (7) on the outer surface of the needle sheath (1) is greater than half of the perimeter of the cross section of the needle sheath (1).

2. The percutaneous renal puncture guide needle according to claim 1, wherein: the cross section of the groove (7) is triangular, rectangular or U-shaped, the distance between two edge lines on the outer surface of the needle sheath (1) is 1mm or 2mm, and the distance between two adjacent edge lines between two adjacent grooves (7) is 1mm or 2 mm.

3. The percutaneous renal puncture guide needle according to claim 1, wherein: the depth of the groove (7) is half of the thickness of the tube wall of the needle sheath (1).

4. The percutaneous renal puncture guide needle according to claim 1, wherein: an auxiliary end part (8) is arranged on the outer ring of the tail part of the needle sheath (1), and the auxiliary end part (8) is circular, oval or rectangular.

5. The percutaneous renal puncture guide needle according to claim 1, wherein: the tail of the needle core (2) is provided with cylindrical blocks (9) which are arranged in a ladder shape, the outer diameter of the cylindrical block (9) positioned at the outermost end is the largest, and the outer circumference of the cylindrical block (9) positioned at the outermost end is provided with vertical strip-shaped threads (10).

6. The percutaneous renal puncture guide needle according to claim 1, wherein: the stylet (2) is made of stainless steel.

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