CN212547108U - Percutaneous kidney puncture needle capable of avoiding vascular injury - Google Patents

Abstract

The utility model relates to a percutaneous kidney puncture needle capable of avoiding vascular injury, which comprises a needle sheath and a needle core, wherein the needle sheath is of a cylindrical structure with an internal hollow part and two open ends, the front end of the needle sheath is of a round head shape, the needle sheath is arranged in the needle core, and the length of the needle core is greater than that of the needle sheath. The utility model has the advantages that: when the needle core passes through the vascular depletion regions such as cortex, subcutaneous fat, muscular layer, renal fascia, fat sac and the like, the needle core firstly passes through the regions quickly by utilizing the tip characteristic; when the puncture needle passes through a cortical area (rich in small blood vessels), the needle sheath firstly passes through, the small blood vessels can not be damaged by utilizing the characteristic of the round head, the protruding state of the needle core is recovered when the puncture needle passes through a renal calyx to a calculus area, the puncture process is completed, the risks of bleeding during and after the operation can be reduced in the actual clinical percutaneous renal puncture process, and the success rate of the operation and the prognosis of a patient are improved.

Description

Percutaneous kidney puncture needle capable of avoiding vascular injury

Technical Field

The utility model relates to the field of medical equipment, concretely relates to percutaneous kidney puncture needle that can avoid vascular injury.

Background

The percutaneous nephrolithotripsy stone-taking technology is a minimally invasive method for treating stones in the upper segment of kidney and ureter, and carries out in-vivo stone breaking and stone taking through a skin renal channel (a channel which penetrates into the renal pelvis and renal calyx through the skin). Compared with the traditional 'lithotomy and calculus removal', the method has small damage to the patient, can finish the whole percutaneous nephrolithotomy by only a small hole of about 1cm, and greatly improves the curative effect and the prognosis of the patient compared with the prior art, but the percutaneous nephrolithotomy is a very technical operation.

Clinically, even a clinician with abundant experience inevitably damages the intrarenal small blood vessels during the puncture process, which is the reason of bleeding during and after the percutaneous nephrolithotomy. The first reason is that the kidney is rich in small vessels and small arteries and small veins which are disordered in shape in the cortex area of the kidney; secondly, because the traditional puncture needle is of an inclined tip type at the front end of the needle core or the front end of the needle sheath, the structure characteristic causes the puncture force to be strong and the destructive power to small blood vessels to be large. Therefore, the traditional puncture needle can aggravate the kidney injury of the patient and increase the bleeding chance after the operation.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is to provide a percutaneous kidney puncture needle which can avoid the vascular injury, so as to overcome the defects in the prior art.

The utility model provides an above-mentioned technical problem's technical scheme as follows: the utility model provides a can avoid vascular injury's percutaneous kidney pjncture needle, includes pin sheath and nook closing member, and the pin sheath is inside cavity, both ends open-ended columnar structure, and the front end of pin sheath is the button head type, and the nook closing member is built in the pin sheath, and the length of nook closing member is greater than the length of pin sheath.

The utility model has the advantages that: when the needle core passes through the vascular depletion regions such as cortex, subcutaneous fat, muscular layer, renal fascia, fat sac and the like, the needle core firstly passes through the regions quickly by utilizing the tip characteristic; when the puncture needle passes through a cortical area (rich in small blood vessels), the needle sheath firstly passes through, the small blood vessels can not be damaged by utilizing the characteristic of the round head, the protruding state of the needle core is recovered when the puncture needle passes through a renal calyx to a calculus area, the puncture process is completed, the risks of bleeding during and after the operation can be reduced in the actual clinical percutaneous renal puncture process, and the success rate of the operation and the prognosis of a patient are improved.

On the basis of the technical scheme, the utility model discloses can also do following improvement.

Furthermore, the outer circumference surface of the front end of the needle sheath is a circular table surface.

The adoption of the further beneficial effects is as follows: the round head at the front end of the needle sheath can be matched with a small blood vessel without damaging the small blood vessel, and the small blood vessel can pass through the poor blood vessel regions such as cortex, subcutaneous fat, muscular layer, renal fascia, fat capsule and the like with small resistance.

Further, the inclination angle of the circular table surface at the front end of the needle sheath is equal to the inclination angle of the needle point of the needle core.

Further, still including adjusting the structure, adjust the structure and include the pin sheath cap, the nook closing member cap and elasticity card cap, pin sheath cap and nook closing member cap set up respectively in the tail end of pin sheath and nook closing member, the one end of elasticity card cap is connected with the nook closing member cap, the other end of elasticity card cap extends towards the pin sheath cap and has the lug, be equipped with draw-in groove a in the preset position on the pin sheath cap, the lug card is gone into to draw-in groove a after the front end of pin core stretches out to the pin sheath from the front end of pin sheath and predetermines length outside to make the pin core and pin sheath relatively fixed.

The adoption of the further beneficial effects is as follows: when the needle core is required to be advanced, the convex block can be positioned in the clamping groove a, so that the front end of the needle core stably extends out of a specified length, and the needle core can conveniently penetrate through poor blood vessel regions such as cortex, subcutaneous fat, muscular layer, renal fascia and fat sac.

Furthermore, a clamping groove b is arranged at a preset position on the needle sheath cap, and the front end of the needle core retracts to the inside of the needle sheath for a preset length from the front end of the needle sheath, and then the convex block is clamped into the clamping groove b, so that the needle core and the needle sheath are relatively fixed.

The adoption of the further beneficial effects is as follows: when the needle core retracts into the needle sheath, the needle core cannot easily extend out, the operation safety is ensured, and meanwhile, the puncture needle can flexibly adjust the prior part in the puncture process.

Drawings

FIG. 1 is a schematic structural view of the percutaneous nephrolithotomy needle with the needle core retracted into the needle sheath for avoiding vascular injury;

FIG. 2 is an enlarged view of a portion of FIG. 1;

FIG. 3 is a schematic structural view of the percutaneous nephrolithotomy needle with the needle core extending out of the needle sheath for avoiding vascular injury;

fig. 4 is a partially enlarged view of fig. 3.

In the drawings, the components represented by the respective reference numerals are listed below:

1. the needle sheath comprises a needle sheath body, 2, a needle core, 3, an adjusting structure, 310, a needle sheath cap, 311, clamping grooves a, 312, clamping grooves b, 320, a needle core cap, 330, elastic clamping caps, 331 and a convex block.

Detailed Description

The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.

Example 1 as shown in fig. 1 to 4, a percutaneous renal puncture needle capable of preventing vascular injury includes a sheath 1 and a core 2, the sheath 1 has a hollow cylindrical structure with two open ends, the tip of the sheath 1 is rounded, the core 2 is embedded in the sheath 1, and the length of the core 2 is greater than that of the sheath 1.

Example 2, as shown in fig. 1 to 4, this example is a further improvement on example 1, and specifically includes the following steps:

the outer circumference surface of the front end of the needle sheath 1 is a circular table surface.

Example 3, as shown in fig. 1 to 4, this example is a further improvement on example 2, and specifically includes the following steps:

the inclined angle of the circular table surface at the front end of the needle sheath 1 is equal to the inclined angle of the needle point of the needle core 2.

Example 4, as shown in fig. 1 to 4, this example is a further improvement on any one of examples 1 to 3, and specifically includes the following steps:

the percutaneous renal puncture needle capable of avoiding vascular injury further comprises an adjusting structure 3, the adjusting structure 3 comprises a needle sheath cap 310, a needle core cap 320 and an elastic clamping cap 330, the needle sheath cap 310 is arranged at the tail end of the needle sheath 1, the needle core cap 320 is arranged at the tail end of the needle core 2, one end of the elastic clamping cap 330 is connected with the needle core cap 320, the other end of the elastic clamping cap 330 extends towards the needle sheath cap 310, a protruding block 331 is arranged at one end, far away from the needle core cap 320, of the elastic clamping cap 330, a clamping groove a311 is arranged at a preset position on the needle sheath cap 310, and after the front end of the needle core 2 extends out of the needle sheath 1 from the front end of the needle sheath 1 to a preset length, the protruding block 331 is clamped into the clamping groove a311, so that the needle core 2 and the needle sheath.

Example 5, as shown in fig. 1 to 4, this example is a further improvement on example 4, and specifically includes the following steps:

the needle sheath cap 310 is provided with a locking groove b312 at a predetermined position, and after the front end of the needle core 2 is retracted from the front end of the needle sheath 1 to a predetermined length inside the needle sheath 1, the protrusion 331 is locked into the locking groove b312, so that the needle core 2 and the needle sheath 1 are relatively fixed.

Of course, in practice, the adjustment mechanism 3 may be embodied as follows, which comprises a sheath cap 310 and a core cap 320, wherein the sheath cap 310 and the core cap 320 are connected by means of a screw connection, and the core 2 is extended out of the sheath 1 and retracted into the sheath 1 by relative rotation.

In each embodiment, the needle core 2 is a solid needle core, so that the needle core is easier to develop under the B ultrasonic and is easier to puncture.

The using method of the percutaneous kidney puncture needle capable of avoiding the vascular injury comprises the following steps:

under normal conditions, the lug 331 is positioned in the clamping groove b312, the needle core 2 is internally accommodated in the needle sheath 1 to protect the needle core 2, when a user walks through a blood vessel lacking region such as skin, fat sac and the like, the lug 331 is positioned in the clamping groove a311, the front end (needle tip) of the needle core 2 extends out from the front end of the needle sheath 1, and the user can quickly walk through the regions by utilizing the strong penetrating power characteristic of the needle tip of the needle core 2; when the patient passes through the area from the cortex to the renal calyx (rich in small blood vessels), the convex block 331 is positioned in the clamping groove b312, the stylet 2 is retracted, the needle sheath 1 is positioned outside, the round head end of the needle sheath 1 is advanced, and the patient passes through the area under the condition of not damaging the small blood vessels, so that the risk of postoperative bleeding in the percutaneous nephrolithotomy can be greatly reduced.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims (4)

1. The percutaneous renal puncture needle capable of avoiding vascular injury is characterized by comprising a needle sheath (1) and a needle core (2), wherein the needle sheath (1) is of a cylindrical structure with a hollow interior and two open ends, the front end of the needle sheath (1) is in a round head shape, the needle core (2) is arranged in the needle sheath (1), and the length of the needle core (2) is greater than that of the needle sheath (1);

still including adjusting structure (3), adjust structure (3) including needle sheath cap (310), nook closing member cap (320) and elasticity card cap (330), needle sheath cap (310) with nook closing member cap (320) set up respectively in needle sheath (1) with the tail end of nook closing member (2), the one end of elasticity card cap (330) with nook closing member cap (320) are connected, the other end of elasticity card cap (330) just has lug (331) towards needle sheath cap (310) extension, be equipped with draw-in groove a (311) in presetting the position on nook closing member cap (310) the front end of nook closing member (2) stretches out to behind the needle sheath (1) outside presetting length the lug (331) are gone into to draw-in groove a (311), so that nook closing member (2) with needle sheath (1) is relatively fixed.

2. A percutaneous nephrolithotomy needle for avoiding vascular injury as defined in claim 1, wherein the outer circumferential surface of the forward end of said sheath (1) is a circular table.

3. A percutaneous nephrolithotomy needle for avoiding vascular injury as claimed in claim 2, wherein the inclination angle of the circular table surface at the front end of the sheath (1) is equal to that of the needle tip of the core (2).

4. A percutaneous nephrolithotomy needle capable of avoiding vascular injury according to claim 1, wherein the sheath cap (310) is provided with a locking groove b (312) at a predetermined position, and the projection (331) is locked into the locking groove b (312) after the front end of the stylet (2) is retracted from the front end of the sheath (1) to a predetermined length inside the sheath (1), so that the stylet (2) and the sheath (1) are relatively fixed.

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