CN101502687B - Monotubular double-chamber syringe needle cylinder - Google Patents

Abstract

The invention provides a single-cylinder double-chamber injector needle cylinder; the needle cylinder is provided with two pistons which divide the needle cylinder into a front chamber and a back chamber; the two pistons are connected with each other by a flexible connecting piece; the front chamber piston is provided with a through hole and a sealing device, thus realizing double drug administration of CT and MR contrast agent and physiological saline; remaining contrast agent in the cylinder is injected into human body by a physiological saline washing pipe and enters vein after being driven, so that the contrast agent reaches the target organ rapidly, thus increasing contrast of pathological changes with surrounding tissues and improving checkout of the pathological changes; meanwhile, blood supply information of nidus is increased, which facilitates diagnosis and differential diagnosis and increases certainty factor of diagnosis by the doctors; when CT and MR angiogram is carried out, contrast between the blood vessel and surrounding tissues is increased, which improves the angiogram effect; perfusion imaging is carried out on CT and MR, so that the contrast agent which enters the targeted organ has more constant rate and more accurate data is obtained; on the basis, more abundant information is expected to be obtained with the same amount of contrast agent used or the use amount of the contrast agent is expected to be reduced.

Description

Monotubular double-chamber syringe needle cylinder

Technical field

The present invention relates to medical syringe field, especially relate to Monotubular double-chamber syringe needle cylinder.

Background technology

At present, CT and MR check needs vein group to inject contrast medium, but enhanced ct scans and improve focus detect and assist the etiologic diagnosis effect, focus can be obtained or/and organ perfusion information with aspect continuous sweep after injecting contrast medium by vein group simultaneously, be CT and MR Perfusion Imaging, can also go non-invasive CT and MR angiography in addition.No matter be conventional contrast enhanced ct scans, still Perfusion Imaging and CT and MR angiography all require contrast medium to enter the blood of human body circulation with certain speed and amount, when particularly going CT and MR blood vessel imaging or Perfusion Imaging, strict more to the requirement of the speed of administration and amount.At present, realize by automatic injector mainly clinically that medicine-feeding rate is generally 3～5ml/s, amount does not wait from several milliliters to more than 100 milliliters.Because will move bed in the CT scan process, MR finishes in scanning holes inner magnet central authorities, all need long connection tube.During the monotubular administration, when finishing, injection still have several milliliters of contrast medium not enter human body in the connection tube, the contrast medium that later stage while enters human body lacks follow-up thrust, mainly rely on the passive arrival target organ of blood circulation, speed is reduced greatly, do not reach the scanning technique requirement, particularly in MR Perfusion Imaging process, the administration total amount often is several milliliters, therefore residual dose is bigger to the result of study influence in the connection tube, in scanning process, the medicine that the later stage enters human body shortage thrust also has considerable influence to imaging effect.For addressing the above problem, adopt bitubular administration clinically, be about to automatic injector and be designed to bitubular connection, wherein one is used for pushing away contrast medium, and another tube is used for pushing away the normal saline flushing connection tube, will remain in the interior contrast medium of connection tube and rush in human body and push target organ to.Though it is residual and enter the follow-up unable problem of human body contrast medium latter stage that bitubular administration solves in the connection tube contrast medium, but the bitubular increases patient economy burden, and waste resource and increase environmental pollution, need purchase bitubular automatic injector again to purchasing monotubular syringe medical institutions in early days simultaneously.

Summary of the invention

Technical problem to be solved by this invention is to bring the problem of the financial burden and the wasting of resources at syringe of the prior art to the patient, and the Monotubular double-chamber syringe needle cylinder of the low and environmental protection of a kind of cost is provided.

For achieving the above object, the invention provides a kind of Monotubular double-chamber syringe needle cylinder, it comprises syringe main body and syringe, the top of this syringe main body is provided with medicine outlet, also include piston in the described syringe, described piston is provided with two, these two pistons are divided into cup and chamber, back with syringe, described two-piston links together by soft connector, described cup piston is provided with through hole and sealing device, wherein: described sealing device is at the cup piston interlayer to be set, be provided with valve with holes in this interlayer, piston edge one side is provided with the inclined-plane, and another example is provided with resetting means, described syringe bottom is provided with projection, and this projection is corresponding with described inclined-plane.

Described sealing device is arranged in the through hole, but the sealing device is the material of repeated localised puncture, and described syringe medicine outlet is provided with corresponding and to the inclined-plane pin of inner process band side opening with sealing device.

The present invention also provides a kind of injecting method of Monotubular double-chamber syringe needle cylinder, and it comprises the following steps:

(1) syringe is connected with syringe, pushes two-piston to the syringe top after the aerofluxus and by the pushing syringe connecting rod;

(2) the chamber piston retreated after the syringe connecting rod retreated pulling, opened sealing device, and normal saline enters into the chamber, back from the through hole of cup piston;

(3) sealing device cuts out, spur the syringe connecting rod again and retreat, contrast medium enters into cup by the syringe outlet;

(4) pushing syringe connecting rod is injected the contrast medium of cup by medicine outlet;

(5) open sealing device, again the normal saline of chamber, back is passed through the through hole arrival syringe medicine outlet of cup piston.

In described (2) and (5) step, opening sealing device is by syringe outlet projection one-way cock to be backed down; In described (3) step sealing device cutting out is that the cup piston is closed one-way cock away from the projection of syringe medicine outlet when filling with normal saline in the chamber, back.

In described (2) and (5) step, open sealing device and be by syringe base projections tube squeezing valve inclined-plane the hole on the valve is communicated with through hole on the cup piston; Sealing device cuts out in described (3) step is by hole and the through hole on the cup piston on the valve are disconnected.

In described (2) and (5) step, open sealing device and be inclined-plane pin by the syringe medicine outlet and pass the sealing device that can pierce through the chamber, back is communicated with medicine outlet; In described (3) step close sealing device be with the cup piston away from medicine outlet after, described inclined-plane pin makes the hole closure of sealing device away from the sealing device of cup piston.

Compared with prior art, the invention provides a kind of Monotubular double-chamber syringe needle cylinder, by two pistons are set in syringe, these two pistons are divided into cup and chamber, back with syringe, at the cup piston through hole and sealing device are set, thereby realize the two administrations of CT and MR contrast medium and normal saline, residue contrast medium in the connection tube is injected human body and drive laggardly to go into the vein contrast medium and reach target organ fast by the normal saline washing pipe, increase the contrast of pathological changes and surrounding tissue, improve detecting of pathological changes; Increase focus blood simultaneously for information, be beneficial to the certainty factor of diagnosis and Differential Diagnosis and enhancing diagnosis; When CT and MR angiography, contrast between increase blood vessel and surrounding tissue, make the angiography effect better; In CT and MR Perfusion Imaging,, used contrast medium make the result more accurate because arriving target organ with relative constant rate of speed.The present invention also can reduce the use amount of injector syringe, is expected to reduce the contrast medium consumption simultaneously, reduces patient economy burden, reduce the wasting of resources and environmental pollution, of the present invention simple in structure, be easy to make, do not need the monotubular automatic injector is done any change, promptly can use.

Description of drawings

Fig. 1 is the cross-sectional view before the embodiment of the invention 1 is inhaled medicine.

Fig. 2 is the cross-sectional view after chamber, the embodiment of the invention 1 back is full of normal saline.

The cup of Fig. 3 embodiment of the invention 1 and chamber, back are full of the cross-sectional view behind normal saline and the contrast medium.

Fig. 4 is the cross-sectional view after the back chamber of the embodiment of the invention 2 is full of normal saline.

Fig. 5 is the cross-sectional view after the invention process row 2 cups and chamber, back are full of normal saline and contrast medium.

Fig. 6 is the cross-sectional view after the back chamber of the embodiment of the invention 3 is full of normal saline.

Fig. 7 is the cross-sectional view after the invention process row 3 cups and chamber, back are full of normal saline and contrast medium.

The specific embodiment

Embodiment 1

As shown in Figure 1, embodiments of the invention provide a kind of Monotubular double-chamber syringe needle cylinder, it comprises syringe main body 1 and syringe (not marking among the figure), the top of this syringe main body 1 is provided withmedicine outlet 5, also includepiston 21 and 22 in the described syringe 1, these twopistons 21 and 22 are divided intocup 12 andchamber 11, back with syringe 1, and describedcup 12pistons 22 are provided with throughhole 4 and sealing device 6.The present invention is by being provided with twopistons 21 and 22 in syringe 1, syringe 1 is divided into two chambers, thereby realize the two administrations of CT and MR contrast medium and normal saline, by the normal saline washing pipe with drive laggardly to go into the vein contrast medium and reach target organ fast, increase the contrast of pathological changes and surrounding tissue, improve detecting of pathological changes.

As Figure 1-3, the described sealing device 6 of the embodiment of the invention is on described throughhole 4 one-way cock to be set, and described syringe 1medicine outlet 5 is provided with the projection 7 towards cup 12.Twopistons 21 of the present invention and 22 are to link together by soft connector 3, and the length of soft connector 3 can be provided with arbitrarily, decide according to chamber, back 11 needed capacity.

As Figure 1-3, the injecting method of the described Monotubular double-chamber syringe needle cylinder of embodiments of the invention, it comprises the following steps:

(1) syringe 1 is connected with syringe, after the aerofluxus and two-piston 21 and 22 is pushed to the top of syringe 1 by the pushing syringe connecting rod;

(2)chamber 11pistons 21 retreated after the syringe connecting rod retreated pulling, opened sealing device 6, and normal saline enters intochamber 11, back from the through hole of medicine outlet projection 7cups 12pistons 22;

(3) sealing device 6 cuts out, spur the syringe connecting rod again and retreat, contrast medium enters intocup 12 by syringe 1medicine outlet 5;

(4) pushing syringe connecting rod is injected the contrast medium ofcup 12 by medicine outlet;

(5) open sealing device 6, again the normal saline ofchamber 11, back is injected by throughhole 4 arrival syringes 1medicine outlet 5 ofcup 12pistons 22.

In the embodiments of the invention injecting method, described syringe is preferably selected automatic injector for use, the connecting rod of automatic injector is connected together with chamber, back 11pistons 21, automatic injector is with after syringe 1 is connected, at first aerofluxus, connecting rod promotes twopistons 21 and 22 to tip motions, when outreaching, the projection 7 of described syringe 1medicine outlet 5 is backed down sealing device one-way cock 6, and described projection 7 is that give prominence to cylindric is good, and described normal saline can enter intochamber 11, back bymedicine outlet 5, when soft connector 3 is stretching, the normal saline ofback chamber 11 is full of, and according to the back indoor bubble that whether has, after the aerofluxus chamber, back is full of once more.Because soft connector 3 is straightened, withdraw the membership behind the automatic injector connectingrod cup 12pistons 22 are pulled back, thepiston 22 ofcup 12 leaves themedicine outlet 5 of syringe 1, and the one-way cock of sealing device 6 also leaves the projection 7 ofmedicine outlet 5, therebychamber 11, back and throughhole 4 andcup 12 sealings are disconnected; Syringe 1medicine outlet 5 is moved to the contrast medium medicine bottle, andback chamber 11pistons 21 move under the pulling of syringe pull bar backward, can spurcup 12pistons 22 and move backward, are filled contrast medium at cup 12.After finishing the suction medicine, also can be according to whether there being bubble to carry out aerofluxus in thecup 12, during administration, the reach of automatic injector connecting rod promotes twopistons 21 and 22 and moves forward, and contrast medium is injected into human body in thecup 12, when contrast medium injection in thecup 12 is intact, the projection 7 ofmedicine outlet 5 is backed down the one-way cock of sealing device 6 again, chamber, back 12medicine outlets 5 are connected, and the connecting rod that continues reach promotes backpiston 21 reaches, and normal saline is injected human body.

Embodiment 2

Present embodiment will be illustrated with the different piece of embodiment 1, and same section repeats no more:

Shown in Fig. 4-5, the describedsealing device 8 of embodiments of the invention is atcup 12pistons 22interlayer 221 to be set, be provided withholes 81 sealedvalve 8 in thisinterlayer 221, describedpiston 8 is set to the inclined-plane with the end thatcup 12pistons 22 edges are connected, describedvalve 8 other ends are provided with resettingmeans 84, for example adopt back-moving spring.Describedcup 12pistons 22stay steam vent 82 towardscup 12 sides, described syringe 1 bottom is provided withprojection 83, thisprojection 83 is corresponding with described inclined-plane, thereby inclined-plane driving device that can be byprojection 83tube squeezing valves 8 makes thehole 81 on the sealedvalve 8 be connected or disconnection mutually with throughhole 4 oncup 12 pistons 22.Syringe of the present invention 1 bottom is provided withprojection 83 and is column or stepped.

The concrete injecting method of present embodiment is as follows:

At first with syringe 1 with after automatic injector is connected, aerofluxus then, connecting rod promotes twopistons 21 and 22 to tip motions, when outreaching, 83 extruding of syringe projection are arranged on the inclined-plane of thevalve 8 ofcup 12pistons 22, sealedvalve 8 is passed,hole 81 on the sealedvalve 8 is connected with throughhole 4 oncup 12pistons 22, therebymedicine outlet 5 is communicated withchamber 11, back, the medicine bottle thatmedicine outlet 5 can be moved on to normal saline begins to suck normal saline, the retreating and only can spur afterwards thatchamber 11pistons 21 retreat of automatic injector connecting rod this moment, suck normal saline and enterchamber 11, back, when the normal saline suction volume reaches chamber, back 11 heap(ed) capacities, connecting two-piston flexible connecting member 3 is straightened, can suspend the suction medicine, and can be according to whether having bubble to carry out aerofluxus in thechamber 11, back, can continue to inhale normal saline after the aerofluxus, afterchamber 11 is full of after inciting somebody to action, move behind chamber, connecting rod pulling back 11pistons 21 that move after the continuation, by moving behind stretching soft connection 3drive cups 12pistons 22,cup 12pistons 22 leave syringe 1base projections 83, and resetting means 84 promotion sealedvalves 8 reset and sealcircular hole 81 oncup 12pistons 22; Againmedicine outlet 5 is moved to the medicine bottle of contrast medium, continue to pull back the syringe connecting rod again, thereby pullingcup 12pistons 22 move backward, to be filled contrast medium in thecup 12, incup piston 22 interlayers a small amount of gas can throughpore 82 overflow suck normal saline and contrast medium after, earlier contrast medium injection is gone into human body, at this moment, thepiston 22 ofcup 12 arrivesmedicine outlet 5 places, theprojection 83 of syringe 1 bottom is the inclined-plane driving device oftube squeezing valve 8 once more,hole 81 on the sealedvalve 8 is connected with throughhole 4 on thepiston 22,medicine outlet 5 andchamber 11, the back pushing syringe connecting rod again that communicates, 11 pistons, 21 reaches of back chamber reach normal saline in thechamber 11, back atmedicine outlet 5 by chamber, back 11 pistons and inject.

Embodiment 3

Present embodiment will be illustrated with the different piece of embodiment 1, and same section repeats no more:

Shown in Fig. 6-7, the described sealing device 9 of present embodiment is arranged in the throughhole 4, but sealing device 9 is the material of repeated localised puncture, and it is good adopting rubber, and described syringe 1medicine outlet 5 is provided with corresponding and to the inclined-plane pin 52 of inner process band side opening 51 with sealing device 9.But the material of repeated localised puncture of the present invention backbevel pin 52 when puncture communicates withchamber 11, back, andmedicine outlet 5 is connected withchamber 11, back, after extracting inclined-plane pin 52, and the hole formation hermetically-sealed construction closed together naturally after this puncture.

The embodiments of the invention injecting method is as follows:

Present embodiment be at first with syringe 1 with after automatic injector is connected, aerofluxus then, connecting rod promotes twopistons 21 and 22 to tip motions, when outreaching, but sealing device 9 of the present invention is the elastomeric material of repeated localised puncture, with the punctured elastomeric material of sealing device 9 of the inclined-plane pin 52 of syringe 1top medicine outlet 5band side openings 51, thereby medicine outlet communicates withchamber 11, back, the retreating and only can spur afterwards thatchamber 11pistons 21 retreat of automatic injector connecting rod this moment, suck normal saline and enterchamber 11, back, when the normal saline suction volume reaches chamber, back 11 heap(ed) capacities, connect two-piston flexible connecting member 3 and be straightened, can suspend the suction medicine, and can be according to whether having bubble to carry out aerofluxus in thechamber 11, back, can continue to inhale normal saline after the aerofluxus,chamber 11, back is full of;Cup 12pistons 22 leave inclined-plane pin 52 under the pulling of stretching soft connection 3, sealing device 9 incup 12pistons 22 is 11 paths of sealingcup 12 and chamber, back automatically, pull back the syringe connecting rod again, thepiston 21 that can drivechamber 11, back retreats, at this moment, be straightened owing to connect two-piston flexible connecting member 3, thereby thepiston 22 that drivescup 12 retreats,medicine outlet 5 is connected with contrast medium, begins to inhale contrast medium; During administration, the reach of automatic injector connecting rod promotes two piston forward and moves, contrast medium is injected into human body in the cup, and when contrast medium had pushed away in thecup 12,cup 12pistons 22 arrived syringe 1 top, the inclined-plane pin 52 puncture through seal devices 9 of themedicine outlet 5 of syringe 1, in piercing process, the side opening 51 of inclined-plane pin 52 guarantees medicine in thecup 12 has been annotated fully as passage, and thecup 12pistons 22 abundant tops that arrive syringe 1,medicine outlet 5 communicates withchamber 11, back; After this continue the pushing syringe connecting rod, thereby promote 11 pistons, 21 reaches of chamber, back, normal saline is injected human body.

In the above embodiment of the present invention, described throughhole 4 can be arranged at the center ofcup 12pistons 22, also can be arranged at other position, decides according to user's needs.The present invention is the bullet structure with describedcup 12pistons 22 towardsmedicine outlet 5 parts, thereby more laborsaving when two pistons of pushing.

The above only is preferred embodiment of the present invention, in order to restriction invention, all in invention spirit and principle within done any modification, be equal to and replace and improvement etc., all should be included within protection scope of the present invention.

Claims (2)

1. Monotubular double-chamber syringe needle cylinder, it comprises syringe main body and syringe, the top of this syringe main body is provided with medicine outlet, also include piston in the described syringe, described piston is provided with two, these two pistons are divided into cup and chamber, back with syringe, described two-piston links together by soft connector, described cup piston is provided with through hole and sealing device, it is characterized in that: described sealing device is at the cup piston interlayer to be set, and is provided with valve with holes in this interlayer, piston edge one side is provided with the inclined-plane, opposite side is provided with resetting means, and described syringe bottom is provided with projection, and this projection is corresponding with described inclined-plane.

2. Monotubular double-chamber syringe needle cylinder according to claim 1, it is characterized in that: described sealing device is arranged in the through hole, but the sealing device is the material of repeated localised puncture, and described syringe medicine outlet is provided with corresponding and to the inclined-plane pin of inner process band side opening with sealing device.

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