CN202538060U

CN202538060U - Safety indwelling needle

Info

Publication number: CN202538060U
Application number: CN2011205737980U
Authority: CN
Inventors: 赵继龙; 王强
Original assignee: Shandong Shinva Ande Healthcare Apparatus Co Ltd
Current assignee: Shandong Shinva Ande Healthcare Apparatus Co Ltd
Priority date: 2011-12-31
Filing date: 2011-12-31
Publication date: 2012-11-21
Anticipated expiration: 2021-12-31

Abstract

The utility model belongs to medical equipment for venous (artery) infusion or blood transfusion, in particular to a safety indwelling needle which comprises a steel needle, a steel needle holder, a soft guide tube and a guide tube holder. The outer wall of the steel needle holder is provided with a projecting ring. A steel needle holder shell is fixed to the periphery of the steel needle holder. A compression spring is disposed in a cavity formed at the front end of the projecting ring and between the steel needle holder and the steel needle holder shell. A steel ball is disposed at the rear end of the projecting ring. The steel needle holder shell is radially provided with a ball movement through hole. The upper portion of the steel ball is located in the ball movement through hole, and the lower portion of the steel ball is abutted to the steel needle holder. A retraction switch is sleeved outside the steel needle holder shell and is provided with a stepped inner hole. A small diameter end of the stepped inner hole is contacted with the steel needle holder shell, and a large diameter end of the stepped inner hole is located at the tail end of the retraction switch. A retraction cylinder is fixed at the tail end of the steel needle holder shell. After puncture made using the indwelling needle, the steel needle holder and the steel needle can be retracted into the retraction cylinder by pushing forward the retraction switch, the tip of the steel needle is unexposed, puncture wound and cross infection are avoided, and safety of patients and operators is guaranteed.

Description

Safety indwelling needle

Technical field

This utility model relates to a kind of safety indwelling needle, is used for quiet (moving) arteries and veins transfusion (blood), belongs to medical apparatus and instruments.

Background technology

Safety indwelling needle is used clinical at present widely, and it adopts the form of flexible catheter cover draw point, and flexible catheter and draw point puncture after the human vas success simultaneously; Extract draw point out and flexible catheter is retained in human vas; It can keep somewhere a couple of days at blood vessel, reduces the patient because of the misery that venipuncture repeatedly causes reaches the fear to having an injection, and alleviates patient's impatience; Be convenient to the infusion of the rescue medication of clinical application and critical, critical patient, alleviate nurse's workload.

Common safety indwelling needle is after clinical puncture finishes, and the draw point of extraction is because of can not in time handling, perhaps in depleted process; Can not effectively protect draw point; Make that in this process exposed needle point is stabbed/scratched patient or associated care personnel formation easily, causes cross infection.Therefore after the success of safety indwelling needle puncture vessel, it is clinical pressing for that draw point is reclaimed protection.

The utility model content

According to above deficiency of the prior art, the technical problem that this utility model will solve is: the draw point that provides a kind of and carry the draw point retracting device, can avoid going out of use stings the safety indwelling needle that injures cross infection.

This utility model solves the technical scheme that its technical problem adopted: described safety indwelling needle, comprise draw point, draw point seat, flexible catheter and catheter block, and draw point, flexible catheter are separately fixed at the front end of draw point seat, catheter block; Draw point is arranged in flexible catheter, it is characterized in that: the outer wall of draw point seat is provided with bulge loop, and the periphery of draw point seat is draw point seat shell fixedly; The compression spring is installed in the cavity that forms between the front end of bulge loop, draw point seat and the draw point seat shell; The bulge loop rear end is provided with steel ball, radially is provided with steel ball motion through hole on the draw point seat shell, and the top of steel ball is arranged in steel ball motion through hole; The bottom is against on the draw point seat; The outer cover of draw point seat shell reinstalls the receipts switch, reclaims switch and is provided with inner bore of step, the miner diameter end of inner bore of step and draw point seat housing contacts; Bigger diameter end is positioned at the end that reclaims switch, and the end of draw point seat shell is recovery cylinder fixedly.

In original state; Draw point is fixed on the draw point seat; The compression spring is between draw point seat, draw point seat shell and the bulge loop, and this moment, steel ball was in the steel ball motion through hole of draw point seat shell, reclaims the inner bore of step miner diameter end extruding steel ball of switch; It is spacing that steel ball is carried out the draw point seat, thereby stop moving of draw point seat; After clinical puncture finishes, draw point is extracted out from quiet/tremulous pulse, pushed away before will reclaiming switch then; Make the bigger diameter end of steel ball relative motion to inner bore of step, under the active force of compression spring, steel ball is compelled to be moved on steel ball moves through hole; No longer the draw point seat is played position-limiting action, the draw point seat retreats in the recovery cylinder together with the effect of draw point at the compression spring next time, and recovery cylinder has enough spaces to hold draw point; Draw point is isolated from the outside, avoids draw point mistake thorn, play protection related personnel's effect.

On the outer wall of described draw point seat shell limited block is set.Can prevent to reclaim switch through limited block skids off from draw point seat shell.

The one side that the bulge loop of said draw point seat contacts with steel ball is lozenges or arc surface.Through lozenges or arc surface are set, when before reclaiming switch, pushing away, are convenient to steel ball and on steel ball moves through hole, move.

In this utility model, recovery cylinder and the draw point seat shell fixed form between the two has multiple, preferred following two kinds of schemes:

Scheme one: described recovery cylinder and draw point seat shell adopt interference fit.Can guarantee that through interference fit recovery cylinder and draw point seat shell are connected to one.

Scheme two: described recovery cylinder is connected through screw threads for fastening with draw point seat shell.Through being threaded, can either guarantee that recovery cylinder and draw point seat shell connect as one, and are convenient to production and assembly again.

The beneficial effect that this utility model had is:

The safety remaining needle through preceding pushing back the receipts switch, can make the draw point seat advance in the recovery cylinder together with steel needle retractable after successfully puncturing, and the draw point needle point can not exposed, thereby protection patient, medical personnel and other related personnel's safety avoid thorn to injure cross infection.

Description of drawings

Fig. 1 is the front view profile of this utility model;

Fig. 2 is the vertical view profile of this utility model;

Fig. 3 is the vertical view profile that draw point reclaims back this utility model;

Fig. 4 is the profile of draw point seat.

Among the figure: 1, sheath; 2, draw point; 3, flexible catheter; 4, catheter block; 5, draw point seat shell; 6, compression spring; 7, draw point seat; 8, reclaim switch; 9, recovery cylinder; 10, bulge loop; 11, limited block; 12, steel ball; 13, lozenges.

The specific embodiment

Below in conjunction with accompanying drawing the embodiment of this utility model is done and to further describe:

Shown in Fig. 1～4, safety indwelling needle comprises draw point 2, draw point seat 7, flexible catheter 3 and catheter block 4; Draw point 2, flexible catheter 3 are separately fixed at the front end of draw point seat 7, catheter block 4, and draw point 2 is arranged in flexible catheter 3, and the outer wall of draw point seat 7 is provided with bulge loop 10; The periphery of draw point seat 7 is draw point seat shell 5 fixedly, and compression spring 6 is installed in the cavity that forms between the front end of bulge loop 10, draw point seat 7 and the draw point seat shell 5, and bulge loop 10 rear ends are provided with steel ball 12; Radially be provided with steel ball motion through hole on the draw point seat shell 5, steel ball motion through hole is the radially active tunnel of steel ball 12, and the top of steel ball 12 is arranged in steel ball motion through hole; The bottom is against on the draw point seat 7; The outer cover of draw point seat shell 5 reinstalls receives switch 8, reclaims switch 8 and is provided with inner bore of step, and the miner diameter end of inner bore of step contacts with draw point seat shell 5; Bigger diameter end is positioned at the end that reclaims switch 8, and the end of draw point seat shell 5 is recovery cylinder 9 fixedly.

Wherein, on the outer wall of draw point seat shell 5 limited block 11 is set, can prevents to reclaim switch 8 through limited block 11 and skid off from draw point seat shell 5; Recovery cylinder 9 is a hollow structure, and an end seals an end opening, and opening and draw point seat shell 5 ends are secure fit or interference fit, produces and guaranteed performance for convenient, preferentially selects for use screw threads for fastening to cooperate; The one side that the bulge loop 10 of draw point seat 7 contacts with steel ball 12 is lozenges 13, and is as shown in Figure 4; In order to guarantee the safe in utilization and sanitary condition of safety indwelling needle, can be provided with sheath 1 at the safety indwelling needle front end by the structure of conventional security remaining needle.

Like Fig. 1, shown in 2; In original state, draw point is fixed on the draw point seat 7, and compression spring 6 is between draw point seat 7, draw point seat shell 5 and the bulge loop 10; This moment, steel ball 12 was in the steel ball motion through hole of draw point seat shell 5; Reclaim the inner bore of step miner diameter end extruding steel ball 12 of switch 8, it is spacing that 12 pairs of draw point seats of steel ball 7 are carried out, thereby stop moving of draw point seat 7; After clinical puncture finishes, draw point is extracted out from quiet/tremulous pulse, pushed away before will reclaiming switch 8 then; Make the bigger diameter end of steel ball 12 relative motioies to inner bore of step; Under the active force of compression spring 6, steel ball 12 is compelled on steel ball moves through hole, to move, no longer to 7 position-limiting actions of draw point seat; Draw point seat 7 retreats in the recovery cylinder 9 together with the effect of draw point 2 at compression spring 6 next time, and is as shown in Figure 3.Wherein, recovery cylinder 9 has enough spaces to hold draw point, and draw point is isolated from the outside, and avoids draw point mistake thorn, plays protection related personnel's effect.

Claims

1. a safety indwelling needle comprises draw point, draw point seat, flexible catheter and catheter block, and draw point, flexible catheter are separately fixed at the front end of draw point seat, catheter block; Draw point is arranged in flexible catheter, it is characterized in that: the outer wall of draw point seat is provided with bulge loop, and the periphery of draw point seat is draw point seat shell fixedly; The compression spring is installed in the cavity that forms between the front end of bulge loop, draw point seat and the draw point seat shell, and the bulge loop rear end is provided with steel ball, radially is provided with steel ball motion through hole on the draw point seat shell; The top of steel ball is arranged in steel ball motion through hole, and the bottom is against on the draw point seat, and the outer cover of draw point seat shell reinstalls the receipts switch; Reclaim switch and be provided with inner bore of step; The miner diameter end of inner bore of step and draw point seat housing contacts, bigger diameter end are positioned at the end that reclaims switch, and the end of draw point seat shell is recovery cylinder fixedly.

2. safety indwelling needle according to claim 1 is characterized in that: the one side that the bulge loop rear end of said draw point seat contacts with steel ball is lozenges or arc surface.

3. safety indwelling needle according to claim 1 is characterized in that: described recovery cylinder and draw point seat shell adopt interference fit.

4. safety indwelling needle according to claim 1 is characterized in that: described recovery cylinder is connected through screw threads for fastening with draw point seat shell.

5. according to any described safety indwelling needle in the claim 1 to 4, it is characterized in that: on the outer wall of described draw point seat shell limited block is set.