CN203763664U - Microscale slow release infusion device for indwelling catheter - Google Patents
Microscale slow release infusion device for indwelling catheter Download PDFInfo
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- CN203763664U CN203763664U CN201420124961.9U CN201420124961U CN203763664U CN 203763664 U CN203763664 U CN 203763664U CN 201420124961 U CN201420124961 U CN 201420124961U CN 203763664 U CN203763664 U CN 203763664U
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- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The utility model belongs to the technical field of medical instruments and discloses a microscale slow release infusion device for an indwelling catheter. According to the microscale slow release infusion device for the indwelling catheter, a direct infusion channel which is used for normal infusion and a slow release channel are constructed through a front connector, a positive pressure chamber and a rear connector which are connected into a whole, and switching of the two infusion channels is achieved through a switching assembly with a main body which arranged inside the positive pressure chamber, then the direct infusion channel is constructed when an infusion tool connects infusion solution, the slow release channel is switched to be started after the direct infusion channel is closed in a delayed mode when the infusion tool is withdrew, residual medicine liquid achieved slow infusion to guarantee that the indwelling catheter remains a positive pressure state for a long time due to a slow release valve, and double purposes of achieving pipe sealing through positive pressure and avoiding thrombus formation due to the fact that blood flows back to the indwelling catheter for a long time during the indwelling period of the indwelling catheter.
Description
Technical field
This utility model relates to technical field of medical instruments, be specifically related to a kind of for using venous detaining needle when transfusion, prevent that inlying catheter and the infusion set time of releasing from producing blood back, and blood backflow and form the inlying catheter trace slow release infusion set of thrombosis or obstruction during keeping somewhere in blood vessel.
Background technology
The venous detaining needle that comprises PICC etc., good substitute products as venous transfusion draw point were applied to so far clinical from 1958, its pluses and minuses are all extremely outstanding, the blood coagulation that its shortcoming major embodiment is inlying catheter and the problem of obstruction, these problems be serious and large-area, also generally acknowledge.To at present, for venous detaining needle is applied the complication causing and eliminates its application risk, derivative positive pressure connector and two kinds of main disposal methods of catheter flusher of forming.In two kinds of disposal methods, the positive pressure connector product that the good fortune the come joint of American I CU medical company of wherein take is representative, comprises the famous German Bei Lang B.BRAUN of company or the positive pressure connector of U.S. company BD, has not really effectively solved problem.The use of positive pressure connector is can produce repulsion at infusion utensil and the venous detaining needle time of releasing, underbalance effect while preventing separation, stoping conduit to produce this blood back phenomenon of the blood back U.S. studies comparatively abundant in early days, be referred to as " syringe be correlated with blood back ", the paper < < delivering in the clinical neurosurgery magazine of < < > > the 4th the 2nd phase of volume in 2007 according to people such as Han Wei can come the experimental data of good fortune joint and calparine cap applied analysis comparative study > > mono-literary composition in venous detaining needle just to report, it is 6% that application can carry out the blood back number of good fortune positive pressure connector, but with the blood back number of calparine cap tube sealing unexpectedly reach 88%! blood back number when this article is not inquired into long-time the indwelling, in Jiangxi, a large amount of clinical datas of monitoring of the ground such as Guangdong, Beijing, Shanghai confirm, at infusion utensil separated with inlying catheter latter 30 minutes, visible blood-flow entered in inlying catheter, and this ratio is up to more than 74%.
This blood back is the known immediate cause that produces blood coagulation in inlying catheter, form thrombosis or obstruction of causing, and these blood coagulation bolts are hidden in inlying catheter end, is hidden in we and opaque blood vessel, and naked eyes cannot directly be observed and relatively hidden.In addition, the common absolute altitude of venous transfusion is in 100cm left and right, in other words, the pressure reduction of annotating during transfusion in inlying catheter approximately reaches 10kPa, if do not processed, these blood coagulations or thrombosis are all pushed back in blood vessel as a rule, and significantly risk is, these blood coagulation bolts might not be in blood vessel size degradation, perhaps the risk that it brings and harm are just surpassing the facility that remaining needle is bringing.Clinical data shows, the positive pressure connector of prior art scheme, effect is limited, its benefit is confined to the time of releasing of infusion utensil, and catheter flusher rinses the technical scheme of inlying catheter, not only increased the labor intensity of medical expense and nursing, the formation risk that also faces thrombosis in 6 hours of its occupation mode interval is still failed fully assessment.
Summary of the invention
Problem to be solved in the utility model is to provide a kind of easy and simple to handle, can prevent the blood back phenomenon during " syringe be correlated with blood back " and indwelling simultaneously, possesses the performance of existing positive pressure connector simultaneously, also possesses long-acting blood back problem while preventing from keeping somewhere, the inlying catheter trace slow release infusion set that need not use catheter flusher irrigating catheter, thoroughly solves the inlying catheter thrombosis prevention device that produces blood coagulation, formation thrombosis or clogging in venous detaining needle use procedure.
To achieve these goals, this utility model has adopted following technical scheme:
A kind of inlying catheter trace slow release infusion set, comprise the front connector connecting as one, plemum and rear joint, described front connector is the locking type joint of an outer cone joint or outer cone joint and female thread combination, or for be communicated with the heteromorphic connector of inlying catheter outer end interface in puncture mode, described rear joint is the locking type joint of a female cone joint or female cone joint and external screw thread combination, described plemum is one can produce the cavity of malleation, cavity is built-in with one and has elastic scalable cup-shaped capsule, cup-like capsule has a blister cavities, described plemum one end is communicated with front connector, joint after the other end is communicated with, described front connector, plemum and rear joint three are communicated with structure one can be for the straight transmission path of transfusion, between described front connector and rear joint, be provided with the changeover module of a transfusion path, described changeover module is arranged on plemum inner chamber, described changeover module is used for will be by front connector, the straight transmission path that plemum and rear joint build switches to slow release path.
Further, on the cavity chamber wall of described plemum, be provided with some the transfusion grooves that are depressed in chamber wall, this transfusion groove is the component part of transfusion path, and its effect is while preventing that blister cavities from expanding in cavity, unlikely obstruction transfusion path, liquid can pass through from the groove of depression.
Further, described changeover module is by guide pillar, rear envelope, cup-like capsule, needle tubing, spring, middle envelope, middle gripper shoe, front envelope and slow release valve constitute, wherein said guide pillar is axially through the blind end center of cup-like capsule fixing cup-like capsule, described needle tubing is arranged on guide pillar through one end of cup-like capsule, described spring is passed its inner ring and is placed in the blister cavities of cup-like capsule by guide pillar and needle tubing, its one end is pushed against blister cavities one end, the other end is fixed in middle gripper shoe, described cup-like capsule opening periphery is connected with middle gripper shoe is closely sealed, closely sealed being connected of inwall of described middle gripper shoe and plemum.
Further, be provided with needle tubing side opening on the tube wall of described needle tubing, front end is sharp needle point.
Further, guide pillar, in the end of rear joint inner chamber one end, is provided with inlet, and it is communicated with the guide pillar side opening that is arranged at guide pillar side direction, medicinal liquid entrance when inlet is this utility model connection infusion utensil.
Further, described rear envelope, middle envelope and front envelope are respectively used to closure or open guide pillar side opening, needle tubing side opening and needle point, and the transverse gage of described middle envelope and front envelope is greater than respectively aperture or the length of needle tubing side opening and needle point.As preferably, described rear envelope, middle envelope and front envelope adopt the macromolecular material manufacture that has certain deformation sealability and can puncture, and medical grade rubber is that silica gel all can.
Further, the assembly of described changeover module or guide pillar wherein and needle tubing can be round along front connector or rear joint direction stroke >=4mm, because the cone joint of infusion syringe tool in iso standard is all stipulated as >=8mm, therefore based on the supporting design of standardization, preferably the trip is 8mm, and the movable length that cup-like capsule is compressible or the movable length > guide pillar side opening of the relatively front envelope of the haul distance > needle point of recovery seals relatively afterwards, these three differences in length can make changeover module in reciprocating stroke, set out dexterously a lasting malleation source and the closed routine of straight transmission path, described closed routine is guide pillar side opening, the program that needle tubing side opening and needle point successively seal successively, this program has been manufactured the delay effect of straight transmission path back-end closure, together with the continuous positive pressure source that haul distance design compressible with cup-like capsule or that restore provides, for positive pressure tube sealing and the realization that continues long-acting malleation provide prerequisite.
When the guide pillar of described changeover module and the assembly of needle tubing come and go along front connector or rear joint direction, while pushing away before guide pillar side opening, cross forward rear envelope, during retrude, cross backward rear envelope, while pushing away before needle tubing side opening, expose to forward middle envelope, during retrude, closure is in middle envelope, while pushing away before needle point, wear out forward and expose to rear envelope surface, at least closed in rear envelope surface during retrude, make needle point closed.
Further, described slow release valve is embedded in front envelope, and slow release valve is filter medium or the combination that merges its supporter, the pressure that the bubble point≤plemum of described filter medium has.Bubble point is the intrinsic physical property of various filter medium such as membrane type, column type, how empty material, and the pressure of plemum depends on the power of bending and stretching of spring, bubble point belongs to two variablees with the power of bending and stretching in this utility model device, the required time span that maintains malleation is depended in the selection of its size, in the constancy of volume of the accommodating liquid of above-mentioned cavity with pre-determine under the prerequisite of the power of bending and stretching of spring, if first take time length, use the filter medium that bubble point value is high, otherwise use bubble to put low filter medium.
Meeting under clinical practice needs prerequisite, the accommodating residual liquor of cavity is preferably at 0.5～1mL or when slightly larger, as after this amount of liquid medicine determined, export more micro-, malleation hold time just longer in principle, but according to physical General Principle and conclusion (of pressure testing), as long as there is medicinal liquid output, no matter its output is small again, can maintain malleation.This utility model device bends and stretches the relation between power size by size and the spring of filter medium bubble point value is set, and can control malleation and hold time more than 1 hour, is preferably 24 hours.
Further, while coming and going along front connector or rear joint direction due to the guide pillar of described changeover module and the assembly of needle tubing, can drive cup-like capsule reduced overall or the stretching, extension that comprises spring, this is the source that plemum produces malleation, cup-like capsule will form effective compression or stretching, extension, air in its blister cavities must effectively discharge or again suck, for aerofluxus or air-breathing, in the middle gripper shoe of described and cup-like capsule opening periphery closure, being provided with at least one connects or via front connector partition and the extraneous exhaust passage connecting with extraneous, the aerofluxus of described blister cavities or air-breathingly pass in and out through exhaust passage.
The another kind of pattern of this utility model, itself and aforesaid difference are, are provided with an elongated segment pipe between described front connector and plemum.Consideration venous detaining needle need to be looked after the problem of individual difference when puncture transfusion, as less in the hand of Asia women, infant etc., this utility model is provided with an elongated segment pipe between front connector and plemum, can, when using this utility model device, to these individual variations, carry out suitability adjustment.
Under many circumstances, infusion set or syringe not all possess the locking type joint of screw socket, and formation of the present utility model has certain bounce, can reduce to a certain extent the bonding strength of the infusion utensil of these non-locking type joints, for strengthening itself and connection safety of the present utility model, described rear joint can be matched an auxiliary joint, this auxiliary joint one end is locking type outer cone joint, the other end is female cone joint, and locking type outer cone joint is directly communicated with female cone joint or via soft pipe connection.
This utility model apparatus structure is lightly fine, similar to existing positive pressure connector volume, uses extremely simple.While using venous detaining needle transfusion, with needleless infusion utensil, insert the rear joint that connects this utility model device, upwards aerofluxus completes, venous detaining needle be can connect and transfusion or injection implemented, direct separated infusion utensil after infusion completes, this utility model device can automatically complete positive pressure tube sealing and implement micro-release injectable, makes inlying catheter maintain barotropic state to prevent inlying catheter blood back until during to infusion next time.
Cardinal principle of the present utility model is:
This utility model device utilizes the medicinal liquid that residues in this utility model device to realize the slow release path of malleation slow release transfusion by building a straight transmission path for normal infusion and one after infusion set is withdrawn, utilizing infusion set to insert connection this utility model device forces changeover module to be advanced as former driving force, to connect the mode of each member, set up straight transmission path, when utilizing spring performance that changeover module is stretched after infusion set is withdrawn to set back to close straight transmission path, enable slow release path, thereby realize two switchings between path, on this basis, also utilize the intrinsic bubble dot characteristics of filter medium to manufacture slow release valve and control the amount that residual liquor enters inlying catheter, to reach, extend holding time of inlying catheter barotropic state, also utilized the reciprocating stroke of changeover module to change the programme-control that forms residual liquor malleation output state simultaneously, both amid all these factors reached and prevented inlying catheter blood back in the infusion set time of releasing, guarantee that again inlying catheter maintains barotropic state for a long time, during reaching whole catheter retaining, all can perfectly stop blood backflow to prevent thrombosed object in inlying catheter.
When coordinating the anti-return bloods of PICC product such as venous detaining needle, central vein conduit, can apply this utility model, compared with the prior art, the beneficial effect of technical solutions of the utility model is:
(1) infusion utensil connects use this utility model device, when inserting connection this utility model device, infusion utensil drive changeover module to advance forward, the straight transmission path that is communicated with normal infusion, compressed the cup-like capsule in plemum simultaneously, when infusion utensil is implemented aerofluxus, medicinal liquid is full of the cavity of plemum, while connecting venous detaining needle transfusion, can realize the transfusion under normal condition, after transfusion finishes, infusion utensil is separated with this utility model device, in the time of releasing, the external force that puts on changeover module due to the insertion of infusion set joint is cancelled, the changeover module reset that bounces back backward, seal straight transmission path, and switch to slow release path, complete the switching of path, medicinal liquid residual and that fill the cavity in plemum starts and via slow release path, injects inlying catheter constantly, make it remain malleation.The design of switching due to path makes the front and back end sealing life period of straight transmission path poor dexterously, it is the rear end of first sealing this utility model device, the front end that sealing is connected with remaining needle and then, such time delay closure designs makes cup-like capsule unfolded by spring and drive cup-like capsule to recover rapidly to expand in state procedure, be able to the medicinal liquid that partly fills the cavity in plemum in inlying catheter, to penetrate rapidly, realize positive pressure tube sealing, the medicinal liquid of remaining part seals by started its malleation infusion by slow release path completely at straight transmission path, thereby automatically realize positive pressure tube sealing and the long-acting inlying catheter malleation that maintains, prevent inlying catheter keep somewhere during blood back, efficiently solve in venous detaining needle use procedure and produce blood coagulation, form the problem of thrombosis or obstruction, also overcome prior art and only solved the wherein defect of a part of problem.
(2) due to the use of slow release valve, it has utilized filter medium bubble dot characteristics, by adjusting filter medium bubble point, make slow release valve form a resistance, this resistance is less than or equal to the normal pressure of plemum, while cup-like capsule being unfolded oppress while expanding the residual medicinal liquid of cavity, just can be in only breaking through the restriction of resistance, make it slowly discharge medicinal liquid and enter joint, be unlikely to again to make the medicinal liquid of minute quantity to discharge soon completely, extended the persistent period of malleation.After reaching and maintaining malleation for a long time, just can avoid for a long time blood back to enter in inlying catheter, make inlying catheter there will not be the problem such as blood coagulation, thrombosis or obstruction, use this utility model device, can abandon catheter flusher and positive pressure connector completely, not only reduce medical expense but also reduce nursing labor intensity.
(3) owing to applying the bubble dot characteristics of filter medium, the actual filtration size of this characteristic and filter medium must not be related to, therefore can guarantee under the prerequisite of certain concrete bubble point of filter medium, length while maintaining malleation as required, and suitably adjust the actual filtration area of filter medium, can effectively extend filter medium the time that microgranule stops up occurs because of long-time micro-infusion, prevent from occurring too early stopping up and cause malleation to lose efficacy, solving the malleation inefficacy defect existing in prior art scheme as published in some.
(4) the succinct safety of using method, meet existing transfusion nursing standard and operating habit, need not deliberately learn to enter clinical use, and integratedly efficiently realize autobarotropy tube sealing and avoid catheters irrigation, without using extra catheters irrigation utensil, significantly simplify nursing procedure flow process, with positive pressure connector tube sealing and every the loaded down with trivial details nursing once of 6 hours irrigating catheters, compare, reduce nursing labor intensity and time and surpass 60%.
(5) realize blood return prevention and thrombotic economic benefits and social benefits performance, only use former infused drug residual fraction, without the exogenous medicinal liquid that uses other such as normal saline, heparin sodium aqua or other anticoagulation medicines, avoid the potential risk that sodium salt is taken in too much or anticoagulant is used.
(6) with existing some declare to compare with the venoclysis needle of continuous positive pressure performance, can connect the integrated chamber room air that clears of infusion utensil, without extra aerofluxus or even cannot aerofluxus, but overcome for preventing that thrombosis is absorbed in the risk of artificial manufacture air embolism.
(7) because this utility model device is the independent utensil that is free on venous detaining needle, therefore it has evaded the functional limitation that certain concrete pattern venous detaining needle may exist, and there is general applicability widely, can carry out with the venous detaining needle of any pattern or the trade mark supportingly, there is the ability that solves topic that whole venous detaining needle is sent one's regards to.
Accompanying drawing explanation
Fig. 1 is the structural representation of this utility model embodiment 1 pre-assembled state.
Fig. 2 is the structural representation of this utility model embodiment 1 transfusion state.
Fig. 3 be this utility model embodiment 1 transfusion state A-A to structural representation.
Fig. 4 is the structural representation of this utility model embodiment 1 infusion set separation process state.
Fig. 5 is the structural representation of this utility model embodiment 1 slow release transfusion state.
Fig. 6 is the structural representation of this utility model embodiment 2 pre-assembled state.
Fig. 7 be this utility model embodiment 2 pre-assembled state A-A to structural representation.
Fig. 8 is the structural representation of this utility model auxiliary joint.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Embodiment 1
As shown in Figure 1, a kind of inlying catheter trace slow release infusion set, comprise the front connector 1 connecting as one, plemum 2 and rear joint 3, described front connector 1 is the locking type joint of an outer cone joint 11 or outer cone joint 11 and female thread 12 combinations, or for be communicated with the heteromorphic connector of inlying catheter outer end interface in puncture mode, described rear joint 3 is the locking type joint of a female cone joint or female cone joint and external screw thread 31 combinations, described plemum 2 is one can produce the cavity 21 of malleation, cavity 21 is built-in with one and has elastic scalable cup-shaped capsule 22, cup-like capsule 22 has a blister cavities 221, described plemum 2 one end are communicated with front connector 1, joint 3 after the other end is communicated with, described front connector 1, plemum 2 and rear joint 3 threes are communicated with structure one can be for the straight transmission path of transfusion, between described front connector 1 and rear joint 3, be provided with a transfusion path changeover module 4, described changeover module 4 is arranged on plemum 2 inner chambers, described changeover module 4 is for will be by front connector 1, the straight transmission path that plemum 2 and rear joint 3 build switches to slow release path.
Further, on the cavity 21 chamber walls of described plemum 2, be provided with some the transfusion grooves 211 that are depressed in chamber wall.
Further, described changeover module 4 is by guide pillar 41, rear envelope 43, cup-like capsule 22, needle tubing 42, spring 44, middle envelope 45, middle gripper shoe 451, front envelope 46 and slow release valve 461 constitute, wherein said guide pillar 41 is axially through the blind end center of cup-like capsule 22 fixing cup-like capsule 22, described needle tubing 42 is arranged on guide pillar 41 through one end of cup-like capsule 22, described spring 44 is passed its inner ring and is placed in the blister cavities 221 of cup-like capsule 22 by guide pillar 41 and needle tubing 42, its one end is pushed against blister cavities 221 one end, the other end is fixed in middle gripper shoe 451, described cup-like capsule 22 opening peripheries and middle closely sealed being connected of gripper shoe 451, closely sealed being connected of inwall of described middle gripper shoe 451 and plemum 2.
Further, be provided with needle tubing side opening 421 on the tube wall of described needle tubing 42, front end is sharp needle point 422.
Further, guide pillar 41, in the end of rear joint 3 inner chamber one end, is provided with inlet 411, and it is communicated with the guide pillar side opening 412 that is arranged at guide pillar 41 side direction.
Further, described rear envelope 43, middle envelope 45 and front envelope 46 are respectively used to closure or open guide pillar side opening 412, needle tubing side opening 421 and needle point 422, and the transverse gage of described middle envelope 45 and front envelope 46 is greater than respectively the perforate length of needle tubing side opening 421 and needle point 422.
Further, the assembly of described changeover module 4 or guide pillar wherein 41 and needle tubing 42 can be preferably 8mm by round stroke along front connector 1 or rear joint 3 directions, cup-like capsule 22 haul distance compressible or that restore is greater than needle point 422 with respect to the movable length of front envelope 46, and needle point 422 is greater than guide pillar side opening 41 with respect to the movable length of rear envelope 43 with respect to the movable length of front envelope 46.
Further, described slow release valve 461 is embedded in front envelope 46, and slow release valve 461 is filter medium or the combination that merges its supporter, the pressure that the bubble point≤plemum 2 of described filter medium has.
Further, as shown in Figure 3, in the middle gripper shoe 451 of described and cup-like capsule 22 opening periphery closures, be provided with three partitions via front connector 1 and the extraneous exhaust passage 452 connecting, the aerofluxus of described blister cavities 221 or air-breathing 452 turnover through exhaust passage.
As shown in Figure 8, the present embodiment can be matched auxiliary joint 6, these auxiliary joint 6 one end are locking type outer cone joint 61, the other end is female cone joint 63, locking type outer cone joint 61 is directly communicated with female cone joint 63 or is communicated with via flexible pipe 62, while using auxiliary joint 6, with locking type outer cone joint 61, be connected with rear joint 3, infusion set is communicated with female cone joint 63.Due to auxiliary joint 6 nonessential formation, so the present embodiment is used the state of auxiliary joint 6 to set forth not connect.
As shown in Fig. 1～Fig. 5, Fig. 1 is the preassembled state of this utility model, the state of transfusion when Fig. 2 is infusion set connection, Fig. 3 be infusion set transfusion while connecting A-A to state, the state of Fig. 4 infusion set and the time of releasing of this utility model device, Fig. 5 is the state that the slow release transfusion when connecting veins indwelling catheter of this utility model device maintains malleation.While using venous detaining needle transfusion, with needleless infusion utensil, insert the rear joint 3 that connects this utility model device, can connect the inlet 411 that is positioned at guide pillar 4 terminations, drive changeover module 4 integral body to advance forward simultaneously, make guide pillar side opening 412 cross the locking of rear envelope 43, now cup-like capsule 22 is shunk in the drive lower compression of guide pillar 41, and before needle tubing side opening 421, go out and expose to middle envelope 45 surfaces, before needle point 422, go out to break through the surface of sealing and expose to front envelope 46, now, because needleless infusion utensil inserts the rear joint 3 that connects this utility model device, completed the structure of the straight transmission path of normal infusion of " infusion set-inlet 411-guide pillar side opening 412-cavity 21-transfusion groove 211-needle tubing side opening 421-needle point 422-outer cone joint 11-inlying catheter ", the routine that before transfusion, this utility model device front connector 1 made progress completes aerofluxus and prepares to connect venous detaining needle transfusion.
When infusion utensil inserts connection this utility model device, changeover module 4 moves ahead, because middle gripper shoe 451 is connected and cannot moves with the chamber wall of the cavity 21 of plemum 2, while moved ahead by this constraint changeover module, compressed the cup-like capsule 22 in plemum 2, this compressive state is unfolded and has been stored potential energy for its follow-up release, and it is the source of malleation driving force.After infusion finishes, infusion utensil is separated with this utility model device, the time of releasing of joint 3 after the joint of infusion utensil is withdrawn from, the external force that puts on changeover module 4 due to the insertion of infusion set joint is cancelled, changeover module 4 reset that bounces back backward, is unfolded by the built-in spring of cup-like capsule 22 44 and drives cup-like capsule 22 to recover to expand rapidly state.And cup-like capsule 22 is from the large process of compressive state recovery Peng, ingehious design due to this utility model device, make guide pillar side opening 412 seal relatively afterwards 43 movable length be less than needle point 422 with respect to front envelope 46 and needle tubing side opening 421 movable length with respect to middle envelope 45, so make the front and back end sealing life period of straight transmission path poor, first seal the rear end of this utility model device, be guide pillar 41 one end, and then the front end that is connected with remaining needle of sealing, this time delay closure designs makes cup-like capsule 22 unfolded by spring 44 and drive cup-like capsule 22 to recover rapidly in the process of the state that expands, be able to the medicinal liquid that partly fills the cavity 21 in plemum 2 in inlying catheter, to penetrate rapidly, realize positive pressure tube sealing, the medicinal liquid of remaining part is at straight transmission path after nearby joint 1 one end is sealed completely, be that needle point 422 bounces back to by front envelope 46 sealings, this utility model device completes after the switching and performance conversion of path automatically, beginning starts its malleation infusion via slow release path.Now, slow release path consists of " cavity 21-transfusion groove 211-slow release valve 461-outer cone joint 11-infusion set ", and the medicinal liquid of its infusion residues in the remainder medicinal liquid of the cavity 21 of plemum 2 while being normal infusion.
Due to 22 strokes that can compress of cup-like capsule be greater than guide pillar side opening 412 with respect to the movable length of rear envelope 43 and needle point 422 movable length with respect to front envelope 46, changeover module 4 bounced back transfusion path switching after, cup-like capsule 22 is unfolded by spring 44 and is driven the process of recovering the state that expands also continuing, it is put aside unfolds the normal pressure source that potential energy becomes plemum 2, the residue medicinal liquid ordering about in cavity 21 injects inlying catheter through slow release path with slow release state continuance, thereby automatically realize positive pressure tube sealing and the long-acting inlying catheter positive pressure direct that maintains when infusing next time, prevent inlying catheter keep somewhere during blood back and form thrombosis.
It is to be noted, slow release path is during straight transmission path is set up, all the time exist, but due to the pressure that is embedded in the preferred bubble point≤plemum 2 of filter medium of the formation slow release valve 461 in front envelope 46 and has, therefore therefore slow release valve 461 has the resistance larger with respect to straight transmission path, in other words be that therefore slow release path has the resistance larger with respect to straight transmission path, so while normally connecting infusion utensil enforcement venous transfusion, medicinal liquid can pass through from the less straight transmission path of resistance, and slow release path relatively seals.But from actual angle, though slow release path when straight transmission path work, the smoothness that also simultaneously keeps medicinal liquid to pass through, the performance that does not also affect this utility model device realizes.
Embodiment 2
As shown in Figure 6, a kind of inlying catheter trace slow release infusion set, comprise the front connector 1 connecting as one, plemum 2 and rear joint 3, between described front connector 1 and plemum 2, be provided with an elongated segment pipe 13, described front connector 1 is the locking type joint of an outer cone joint 11 or outer cone joint 11 and female thread 12 combinations, or for be communicated with the heteromorphic connector of inlying catheter outer end interface in puncture mode, described rear joint 3 is the locking type joint of a female cone joint or female cone joint and external screw thread 31 combinations, described plemum 2 is one can produce the cavity 21 of malleation, cavity 21 is built-in with one and has elastic scalable cup-shaped capsule 22, cup-like capsule 22 has a blister cavities 221, described plemum 2 one end are communicated with front connector 1, joint 3 after the other end is communicated with, described front connector 1, plemum 2 and rear joint 3 threes are communicated with structure one can be for the straight transmission path of transfusion, between described front connector 1 and rear joint 3, be provided with a transfusion path changeover module 4, described changeover module 4 is arranged on plemum 2 inner chambers, described changeover module 4 is for will be by front connector 1, the straight transmission path that plemum 2 and rear joint 3 build switches to slow release path.
Further, on the cavity 21 chamber walls of described plemum 2, be provided with some the transfusion grooves 211 that are depressed in chamber wall.
Further, described changeover module 4 is by guide pillar 41, rear envelope 43, cup-like capsule 22, needle tubing 42, spring 44, middle envelope 45, middle gripper shoe 451, front envelope 46 and slow release valve 461 constitute, wherein said guide pillar 41 is axially through the blind end center of cup-like capsule 22 fixing cup-like capsule 22, described needle tubing 42 is arranged on guide pillar 41 through one end of cup-like capsule 22, described spring 44 is passed its inner ring and is placed in the blister cavities 221 of cup-like capsule 22 by guide pillar 41 and needle tubing 42, its one end is pushed against blister cavities 221 one end, the other end is fixed in middle gripper shoe 451, described cup-like capsule 22 opening peripheries and middle closely sealed being connected of gripper shoe 451, closely sealed being connected of inwall of described middle gripper shoe 451 and plemum 2.
Further, be provided with needle tubing side opening 421 on the tube wall of described needle tubing 42, front end is sharp needle point 422.
Further, guide pillar 41, in the end of rear joint 3 inner chamber one end, is provided with inlet 411, and it is communicated with the guide pillar side opening 412 that is arranged at guide pillar 41 side direction.
Further, described rear envelope 43, middle envelope 45 and front envelope 46 are respectively used to closure or open guide pillar side opening 412, needle tubing side opening 421 and needle point 422, and the transverse gage of described middle envelope 45 and front envelope 46 is greater than respectively the perforate length of needle tubing side opening 421 and needle point 422.
Further, the assembly of described changeover module 4 or guide pillar wherein 41 and needle tubing 42 can be preferably 8mm by round stroke along front connector 1 or rear joint 3 directions, cup-like capsule 22 haul distance compressible or that restore is greater than needle point 422 with respect to the movable length of front envelope 46, and needle point 422 is greater than guide pillar side opening 412 with respect to the movable length of front envelope 46 and seals relatively afterwards 43 movable length.。
Further, described slow release valve 461 is embedded in front envelope 46, and slow release valve 461 is filter medium or the combination that merges its supporter, the pressure that the bubble point≤plemum 2 of described filter medium has.
Further, as shown in Figure 7, in the middle gripper shoe 451 of described and cup-like capsule 22 opening periphery closures, be provided with three with the extraneous exhaust passages 452 that connect, the aerofluxus of described blister cavities 221 or air-breathingly 452 pass in and out through exhaust passage.
The straight transmission path of the present embodiment is " infusion set-inlet 411-guide pillar side opening 412-cavity 21-transfusion groove 211-needle tubing side opening 421-needle point 422-extension tube 13-outer cone joint 11-inlying catheter " while building; Slow release path is that " cavity 21-transfusion groove 211-slow release valve 461-extension tube 13-outer cone joint 11-infusion set " forms.
As shown in Figure 8, the present embodiment can be matched auxiliary joint 6, and these auxiliary joint 6 one end are locking type outer cone joint 61, and the other end is female cone joint 63, and locking type outer cone joint 61 is directly communicated with female cone joint 63 or is communicated with via flexible pipe 62.While using auxiliary joint 6, with locking type outer cone joint 61, be connected with rear joint 3, infusion set is communicated with female cone joint 63.Due to auxiliary joint 6 nonessential formation, so the present embodiment is used the state of auxiliary joint 6 to set forth not connect.
All the other are all consistent with embodiment 1.
Although the technical solution of the utility model is to describe with reference to specific embodiment, this description not meaning that is construed as limiting this utility model.With reference to description of the present utility model, with other variations of the disclosed embodiments, all can expect for those skilled in the art, this variation should belong in affiliated claim limited range.
Claims (13)
1. inlying catheter trace slow release infusion set, comprise the front connector (1) connecting as one, plemum (2) and rear joint (3), described front connector (1) is the locking type joint of an outer cone joint (11) or outer cone joint (11) and female thread (12) combination, or for be communicated with the heteromorphic connector of inlying catheter outer end interface in puncture mode, described rear joint (3) is the locking type joint of a female cone joint or female cone joint and external screw thread (31) combination, described plemum (2) is one can produce the cavity (21) of malleation, cavity (21) is built-in with one and has elastic scalable cup-shaped capsule (22), cup-like capsule (22) has a blister cavities (221), described plemum (2) one end is communicated with front connector (1), joint (3) after the other end is communicated with, described front connector (1), plemum (2) and rear joint (3) three are communicated with structure one can be for the straight transmission path of transfusion, it is characterized in that, between described front connector (1) and rear joint (3), be provided with a transfusion path changeover module (4).
2. inlying catheter trace slow release infusion set according to claim 1, is characterized in that, described changeover module (4) is arranged on plemum (2) inner chamber.
3. inlying catheter trace slow release infusion set according to claim 1, is characterized in that, on cavity (21) the chamber wall of described plemum (2), is provided with some the transfusion grooves (211) that are depressed in chamber wall.
4. inlying catheter according to claim 1 trace slow release infusion set, it is characterized in that, described changeover module (4) is for switching to slow release path by the straight transmission path being built by front connector (1), plemum (2) and rear joint (3).
5. inlying catheter according to claim 1 trace slow release infusion set, it is characterized in that, described changeover module (4) is by guide pillar (41), rear envelope (43), cup-like capsule (22), needle tubing (42), spring (44), middle envelope (45), middle gripper shoe (451), front envelope (46) and slow release valve (461) constitute, wherein said guide pillar (41) is axially through the blind end center of cup-like capsule (22) fixing cup-like capsule (22), described needle tubing (42) is arranged on guide pillar (41) through one end of cup-like capsule (22), described spring (44) is passed its inner ring and is placed in the blister cavities (221) of cup-like capsule (22) by guide pillar (41) and needle tubing (42), its one end is pushed against blister cavities (221) one end, the other end is fixed in middle gripper shoe (451), described cup-like capsule (22) opening periphery and closely sealed being connected of middle gripper shoe (451), closely sealed being connected of inwall of described middle gripper shoe (451) and plemum (2).
6. inlying catheter trace slow release infusion set according to claim 5, is characterized in that, on the tube wall of described needle tubing (42), be provided with needle tubing side opening (421), front end is sharp needle point (422).
7. inlying catheter according to claim 5 trace slow release infusion set, it is characterized in that, guide pillar (41), in the end of rear joint (3) inner chamber one end, is provided with inlet (411), and it is communicated with the guide pillar side opening (412) that is arranged at guide pillar (41) side direction.
8. inlying catheter according to claim 5 trace slow release infusion set, it is characterized in that, described rear envelope (43), middle envelope (45) and front envelope (46) are respectively used to closure or open guide pillar side opening (412), needle tubing side opening (421) and needle point (422), and the transverse gage of described middle envelope (45) and front envelope (46) is greater than respectively the perforate length of needle tubing side opening (421) and needle point (422).
9. inlying catheter according to claim 5 trace slow release infusion set, it is characterized in that, the assembly of described changeover module (4) or guide pillar wherein (41) and needle tubing (42) can be round along front connector (1) or rear joint (3) direction stroke >=4mm, the compressible or haul distance > needle point (422) that restores of cup-like capsule (22) is the movable length with respect to rear envelope (43) with respect to the movable length > guide pillar side opening (412) of front envelope (46).
10. inlying catheter according to claim 5 trace slow release infusion set, it is characterized in that, described slow release valve (461) is embedded in front envelope (46), slow release valve (461) is filter medium or the combination that merges its supporter, the pressure that the bubble point≤plemum (2) of described filter medium has.
11. inlying catheter trace slow release infusion sets according to claim 1, is characterized in that, are provided with an elongated segment pipe (13) between described front connector (1) and plemum (2).
12. according to the inlying catheter trace slow release infusion set described in arbitrary one of claim 1～11, it is characterized in that, in the middle gripper shoe (451) of described and cup-like capsule (22) opening periphery closure, being provided with at least one connects or via partition and the extraneous exhaust passage (452) connecting, the aerofluxus of described blister cavities (221) or air-breathing (452) turnover through exhaust passage of front connector (1) with extraneous.
13. inlying catheter trace slow release infusion sets according to claim 1, it is characterized in that, described rear joint (3) apolegamy has an auxiliary joint (6), its one end is locking type outer cone joint (61), the other end is female cone joint (63), and locking type outer cone joint (61) is directly communicated with female cone joint (63) or is communicated with via flexible pipe (62).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420124961.9U CN203763664U (en) | 2014-03-13 | 2014-03-13 | Microscale slow release infusion device for indwelling catheter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420124961.9U CN203763664U (en) | 2014-03-13 | 2014-03-13 | Microscale slow release infusion device for indwelling catheter |
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| Publication Number | Publication Date |
|---|---|
| CN203763664U true CN203763664U (en) | 2014-08-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420124961.9U Expired - Lifetime CN203763664U (en) | 2014-03-13 | 2014-03-13 | Microscale slow release infusion device for indwelling catheter |
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| CN (1) | CN203763664U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103845791A (en) * | 2014-03-13 | 2014-06-11 | 李宜 | Indwelling catheter trace slow-release transfusion device |
| CN104436363A (en) * | 2014-12-01 | 2015-03-25 | 邹卫平 | Indwelling needle controlled-release positive pressure device |
| CN107847686A (en) * | 2015-07-24 | 2018-03-27 | 株式会社大塚制药工场 | Needle assemblies |
-
2014
- 2014-03-13 CN CN201420124961.9U patent/CN203763664U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103845791A (en) * | 2014-03-13 | 2014-06-11 | 李宜 | Indwelling catheter trace slow-release transfusion device |
| CN103845791B (en) * | 2014-03-13 | 2017-01-11 | 广东先来医疗器械有限公司 | Indwelling catheter trace slow-release transfusion device |
| CN104436363A (en) * | 2014-12-01 | 2015-03-25 | 邹卫平 | Indwelling needle controlled-release positive pressure device |
| CN104436363B (en) * | 2014-12-01 | 2017-12-22 | 河南曙光健士医疗器械集团股份有限公司 | A kind of remaining needle is sustained positive pressure devices |
| CN107847686A (en) * | 2015-07-24 | 2018-03-27 | 株式会社大塚制药工场 | Needle assemblies |
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Effective date of registration: 20160106 Address after: 525000, No. 07, No. two, No. second, private science and Technology Industrial Park, Dianbai County, Guangdong, Maoming Patentee after: GUANGDONG XIANLAI MEDICAL INSTRUMENT CO., LTD. Address before: Five road 525000 Guangdong province Maoming Shuangshan compound No. 68 room 702 No. 15 Patentee before: Li Yi |