CN206777583U - Pipe-blocking-proof venous detaining needle - Google Patents

Abstract

It the utility model is related to technical field of medical instruments, a kind of specifically pipe-blocking-proof venous detaining needle, two side rails are provided with a pair of roller locator devices, there is a circular shaft structure above described positive pressure devices pan outlet end, an attached hasp on circular shaft, it is smooth structure on the inside of roller locator device to the guide rail between positive pressure devices pan outlet end for preventing roller from retracting.The utility model is compared with the existing technology, it the advantage is that during use of the present utility model, by extruding, promoting positive pressure devices after the completion of transfusion, the liquid in extension flexible pipe is set to be flowed to catheter proximal end, catheter proximal end is set to have liquid outflow, blood, which remains in, when avoiding infusing next time forms embolism in conduit, pre- pipe-blocking-proof, simple operation, effectively extend indwelling time, and roller will not cause to shake when rolling, beneficial to the closure of patient wound, in addition when infusing again, blood back can be formed by pushing back roller, facilitate deciding on clearness of catheter situation.

Description

Pipe-blocking-proof venous detaining needle

[technical field]

Technical field of medical instruments is the utility model is related to, specifically a kind of pipe-blocking-proof venous detaining needle.

[background technology]

Existing intravenous infusion needle easily pierces through blood vessel in infusion process, must change every time.The invention of venous detaining needle These shortcomings are overcome with application, are needed to extract out nook closing member after completing venipuncture during use, sleeve pipe are only left, so will not damage Blood vessel, it can stay in intravascular continuously with several days.Meanwhile the use of venous detaining needle can also reduce patient because of venipuncture repeatedly Painful caused by and, and can mitigates the workload of nurse, is easy to clinical application, thus venous detaining needle clinically obtains extensively Using.

Existing venous detaining needle, flow-stopping clip is cased with its extension tube.During normal infusion, flow-stopping clip is in open shape State, calparine cap or end cap is coordinated to be infused by infusion device；When needing to suspend transfusion, applying external force closes fluid stopping clamping, Extension tube is clamped and extension tube is in disconnection state by the boss in flow-stopping clip.The mode of such a pause transfusion is rapidly straight Clamping mode is connect, usual flow-stopping clip manufactures for semi-steel plastic material, and the elasticity due to plastics while directly clamping is made With, make with producing negative pressure in the conduit of sick body contact position, so as to cause to be retained in the conduit in human body produce blood back, this time Blood is to be known to result in producing blood coagulation in inlying catheter, form the immediate cause of thrombus or blocking, and these blood coagulation bolts are hidden in indwelling Catheter tip, be hidden in we and it is opaque intravascular, visually can not directly observe and relatively hidden, influence follow-up defeated Liquid, even if pressurization is washed open, thrombus may also can block capillary, even result in vasculitis, cause unnecessary malpractice.

In order to avoid causing plugging in blood backflow to pin, slowly injection positive pressure tube sealing method or malleation fluid stopping device are used Positive pressure tube sealing, but existing malleation fluid stopping apparatus structure is complicated, it is expensive.

In view of the foregoing, China's number of patent application：CN201520362363.X discloses a kind of band that is used for and extrudes propulsion The remaining needle of formula positive pressure devices, prevent negative pressure and blood coagulation, thrombus or stopping state are produced because of blood back.But specifically facing Bed be in use, its roller can cause vibrations when crossing retaining muscle, and so as to drive conduit to shake together, this is for infusing It is very unfavorable for patient, because this vibrations can cause wound hemorrhage and inflammation symptom, is unfavorable for patient's wound Closure.

Therefore, it is necessary to be made improvements to the structure of existing design, a kind of new pipe-blocking-proof venous detaining needle is designed, pre- On the basis of pipe-blocking-proof, simple operation, and can prevents from shaking caused by roller, solves the problems, such as to run into clinical manipulation, meets Extension needs.

[utility model content]

The purpose of this utility model is solve the deficiencies in the prior art, there is provided it is a kind of simple to operate, while solve indwelling Period blood back problem, that is, but also with avoiding because of blood back during indwelling while possessing malleation performance, and cause blood clotting, stifled Plug, so as to shorten the technical problem of indwelling time, the novel pipe-blocking-proof venous detaining needle of this structure will not be because of the rolling of roller And conduit is caused to shake.

To achieve these goals, a kind of pipe-blocking-proof venous detaining needle, including infusion connector, extension flexible pipe, puncture are designed Pin, Paracentesis needle holder and conduit tube component, infusion connector are provided with malleation by extending flexible pipe connecting conduit seat, described extension flexible pipe Device, described positive pressure devices include base, roller and hasp, and transfusion groove is provided between base and roller, extend flexible pipe and pass through The transfusion groove, described positive pressure devices chassis interior both sides are provided with guide rail, it is characterised in that：Two side rails are provided with a pair roller Positioner, there is a circular shaft structure above described positive pressure devices pan outlet end, an attached hasp on circular shaft, for preventing from rolling Wheel retracts, and is smooth structure on the inside of roller locator device to the guide rail between positive pressure devices pan outlet end.

Described roller locator device is retaining muscle, and retaining muscle is arranged at positive pressure devices base arrival end side.

There is the barb extended at two below the front end of described hasp, when on buckle cap, barb will be buckled in leading for base In rail.

The utility model compared with the existing technology, the advantage is that during use of the present utility model that transfusion is completed Afterwards by extruding, promoting positive pressure devices, the liquid in extension flexible pipe is flowed to catheter proximal end, catheter proximal end is had liquid flow Go out, blood, which remains in, when avoiding infusing next time forms embolism in conduit, pre- pipe-blocking-proof, simple operation, effectively extend indwelling Time, and roller will not cause to shake when rolling, and beneficial to the closure of patient wound, in addition when infusing again, push back roller Blood back can be formed, facilitates deciding on clearness of catheter situation.

[brief description of the drawings]

Fig. 1 is the structural representation of the utility model device；

Fig. 2 is the concrete structure schematic diagram of positive pressure devices base in the utility model device；

Fig. 3 is the front view of positive pressure devices roller in the utility model device；

Fig. 4 is the top view of positive pressure devices roller in the utility model device；

Fig. 5 is the front view of positive pressure devices hasp in the utility model device；

Fig. 6 is the side view of positive pressure devices hasp in the utility model device；

Fig. 7 is the top view of positive pressure devices hasp in the utility model device；

In figure：1. the inlying catheter 3. of sheath 2. extends the puncture needle of 6. puncture needle of flexible pipe 4. catheter block, 5. batching pig 7. The roller 15. of 10. 12. retaining muscle of fungi-proofing 11. infusion connector of block, 13. circular shaft of seat 8. positive pressure devices, 9. calparine cap 14. Hasp.

[embodiment]

The utility model is described in further detail below in conjunction with the accompanying drawings, the structure and principle of this device people professional to this For be very clear.It should be appreciated that specific embodiment described herein is only to explain the utility model, and do not have to In restriction the utility model.

Referring to Fig. 1, described pipe-blocking-proof venous detaining needle, including infusion connector, extension flexible pipe, puncture needle, Paracentesis needle holder And conduit tube component, for infusion connector by extending flexible pipe connecting conduit seat, described extension flexible pipe is provided with positive pressure devices, described Positive pressure devices include base, roller and hasp, and transfusion groove is provided between base and roller, extend flexible pipe and pass through the transfusion groove.It is defeated The entrance point cross-sectional area of liquid bath is more than the port of export cross-sectional area of transfusion groove, and flexible pipe is parallel each other sets with extension for guide rail Put, the cross-sectional width of transfusion groove entrance point is more than the internal cavity cross-sectional width for extending flexible pipe, and base bottom is provided with arc knot Structure, be bonded with the finger shape of people, clamp base when pushing away and push back roller before being easy to, extend flexible pipe one end connection infusion connector and Calparine cap, extends flexible pipe other end connection piercing portions, and piercing portions include catheter block, Paracentesis needle holder and sheath, in catheter block Provided with isolation ward, isolation ward is by inlying catheter connecting puncture needle, and sheath is set in outside puncture needle and inlying catheter and one end It is fixed on catheter block.

Referring to Fig. 2, described positive pressure devices chassis interior both sides are provided with guide rail, and two side rails are up to provided with a pair roller less Positioner, there is a circular shaft structure above described positive pressure devices pan outlet end, an attached hasp on circular shaft, for preventing from rolling Wheel retracts, and roller locator device is retaining muscle, and retaining muscle is arranged at positive pressure devices base arrival end side, guide rail and groove of infusing Bottom is provided with positioning bar, and when the axle of roller crosses retaining muscle, positioning bar can prevent that roller from travelling forward more positions, avoids Blood back.

It is the schematic diagram of positive pressure devices roller in the utility model device referring to Fig. 3 and Fig. 4.

Referring to Fig. 5, Fig. 6 and Fig. 7, there is the barb extended at two below the front end of hasp, when on buckle cap, barb will be detained In the guide rail of base.

Claims (3)

1. a kind of pipe-blocking-proof venous detaining needle, including infusion connector, extension flexible pipe, puncture needle, Paracentesis needle holder and conduit tube component, defeated Liquid joint is provided with positive pressure devices by extending flexible pipe connecting conduit seat, described extension flexible pipe, and described positive pressure devices include Base, roller and hasp, transfusion groove is provided between base and roller, extends flexible pipe and pass through the transfusion groove, described positive pressure devices Chassis interior both sides are provided with guide rail, it is characterised in that：Two side rails are provided with a pair of roller locator devices, described positive pressure devices There is a circular shaft structure above pan outlet end, an attached hasp on circular shaft, for preventing roller from retracting, roller locator device is to just It is smooth structure on the inside of guide rail between pressure device pan outlet end.

2. a kind of pipe-blocking-proof venous detaining needle as claimed in claim 1, it is characterised in that roller locator device is retaining muscle, only Move back muscle and be arranged at positive pressure devices base arrival end side.

3. a kind of pipe-blocking-proof venous detaining needle as claimed in claim 1, it is characterised in that have below the front end of hasp and prolong at two The barb stretched, when on buckle cap, barb will be buckled in the guide rail of base.