CN102512728B

CN102512728B - Safe indwelling needle

Info

Publication number: CN102512728B
Application number: CN2011104590409A
Authority: CN
Inventors: 赵继龙; 王强
Original assignee: Shandong Shinva Ande Healthcare Apparatus Co Ltd
Current assignee: Shandong ande medical supplies Co.,Ltd.
Priority date: 2011-12-31
Filing date: 2011-12-31
Publication date: 2013-07-10
Anticipated expiration: 2031-12-31
Also published as: CN102512728A

Abstract

The invention belongs to medical apparatuses for venous and arterial transfusion (blood transfusion) and particularly relates to a safe indwelling needle. The safe indwelling needle comprises a steel needle, a steel needle base, a soft catheter and a catheter base, wherein a protruding ring is arranged on the outer wall of the steel needle base; a steel needle base casing is fixed on the edge of the steel needle base; a compressed spring is installed in a cavity at the front end of the protruding; a steel ball is arranged at the back end of the protruding ring; a steel ball moving through hole is radially formed on the steel needle base casing; the upper part of the steel ball is positioned in the steel ball moving through hole; the lower part of the steel ball presses against the steel needle base; a retracting switch is sleeved on the outer part of the steel needle base casing; an inner step hole is formed on the retracting switch; a small-diameter end of the inner step hole contacts the steel needle base casing, and a large-diameter end of the inner step hole is positioned at the tail end of the retracting switch; and a retracting barrel is fixed at the tail end of the steel needle base casing. After the indwelling needle is punctured, the retracting switch is forwardly pushed to retract the steel needle base together with the steel needle into the retracting barrel, so that the tip of the steel needle is not exposed, the puncture injury and the cross infection can be avoided and the safety of a patient and an operator can be ensured.

Description

Safety indwelling needle

Technical field

The present invention relates to a kind of safety indwelling needle, be used for quiet (moving) arteries and veins transfusion (blood), belong to medical apparatus and instruments.

Background technology

Safety indwelling needle is used clinical at present widely, it adopts the form of flexible catheter cover draw point, 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 misery that the patient causes because of venipuncture repeatedly and reaches fear to having an injection, 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 can not in time handling, perhaps in discarded 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.

Summary of the invention

According to above deficiency of the prior art, the technical problem to be solved in the present invention 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.

The technical solution adopted for the present invention to solve the technical problems is: described safety indwelling needle, comprise draw point, the draw point seat, flexible catheter and catheter block, draw point, flexible catheter is separately fixed at the draw point seat, the front end of 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, the periphery of draw point seat is draw point seat shell fixedly, the front end of bulge loop, the compression spring is installed in the cavity that forms between draw point seat and the draw point seat shell, the bulge loop rear end arranges steel ball, radially be 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, the bottom is against on the draw point seat, 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.

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, this moment, steel ball was in the steel ball motion through hole of draw point seat shell, reclaim 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 the movement 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 steel ball relative motion to the bigger diameter end of inner bore of step; under the active force of compression spring; steel ball is forced to move on steel ball moves through hole, no longer the draw point seat is played position-limiting action, and the draw point seat retreats in the recovery cylinder together with draw point in the effect of compression spring next time; 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 from reclaiming switch by limited block skids off from draw point seat shell.

The one side that the bulge loop of described draw point seat contacts with steel ball is lozenges or arc surface.By 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.

Among the present invention, recovery cylinder and the draw point seat shell fixed form between the two has multiple, is preferably as follows two kinds of schemes:

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

Scheme two: described recovery cylinder is connected by screw threads for fastening with draw point seat shell.By 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 the present invention has is:

The safety remaining needle by 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 front view profile of the present invention;

Fig. 2 is vertical view profile of the present invention;

Fig. 3 is that draw point reclaims back vertical view profile of the present invention;

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 embodiments of the invention are described further:

Shown in Fig. 1～4, safety indwelling needle, comprise draw point 2, draw point seat 7, flexible catheter 3 and catheter block 4, draw point 2, flexible catheter 3 is separately fixed at draw point seat 7, the front end of catheter block 4, draw point 2 is arranged in flexible catheter 3, 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, the front end of bulge loop 10, compression spring 6 is installed in the cavity that forms between draw point seat 7 and the draw point seat shell 5, bulge loop 10 rear ends arrange 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, the top of steel ball 12 is arranged in steel ball motion through hole, and the bottom is against on the draw point seat 7, and the outer cover of draw point seat shell 5 reinstalls receives switch 8, reclaim switch 8 and be provided with inner bore of step, the miner diameter end of inner bore of step contacts with draw point seat shell 5, and 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 from reclaiming switch 8 by limited block 11 and skid off from draw point seat shell 5; Recovery cylinder 9 is 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, as shown in Figure 4; In order to guarantee use safety and the 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.

As shown in Figure 1, 2, in original state, draw point is fixed on the draw point seat 7, 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 the movement of draw point seat 7; After clinical puncture finishes, draw point is extracted out from quiet/tremulous pulse, push away before will reclaiming switch 8 then, make steel ball 12 relative motioies to the bigger diameter end of inner bore of step, under the active force of compression spring 6, steel ball 12 is forced to move on steel ball moves through hole, no longer to 7 position-limiting actions of draw point seat, draw point seat 7 retreats in the recovery cylinder 9, as shown in Figure 3 next time together with the effect of draw point 2 at compression spring 6.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. safety indwelling needle, comprise draw point, the draw point seat, flexible catheter and catheter block, draw point, flexible catheter is separately fixed at the draw point seat, the front end of 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, the periphery of draw point seat is draw point seat shell fixedly, the front end of bulge loop, the compression spring is installed in the cavity that forms between draw point seat and the draw point seat shell, the bulge loop rear end arranges steel ball, radially be 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, it is characterized in that: the one side that the bulge loop rear end of described 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 employing interference fit.

4. safety indwelling needle according to claim 1, it is characterized in that: described recovery cylinder is connected by 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.