CN209611874U - A kind of functional intravenous guide tube device blocked - Google Patents

Abstract

A kind of functional intravenous guide tube device blocked, comprising: needle tubing, needle tubing seat, ductus venosus, ductus venosus seat；Needle tubing passes through seal, and needle tubing front end is exposed from ductus venosus front opening；It is moveable to block silk；Part or all of isolated part being isolated from the outside that silk will be blocked；It further include boosting seal wire and guide path；It blocks the hollow formation of silk at least endpiece and blocks silk inner cavity, boosting seal wire, which can partly or entirely enter, blocks silk inner cavity；Guide path at least front end is straight tube-like；Guide path front opening is connected to directly or by ductus venosus seat inner cavity with ductus venosus inner cavity, and closure silk passes through guide path under boosting seal wire auxiliary and enters ductus venosus inner cavity；The position that guide path at least straight tubular portions are overlapped to center axis thereof with ductus venosus central axis with the moving in rotation that ductus venosus can externally be isolated；Closure silk, boosting seal wire and the guide path that directly can be contacted and/or be in fluid communication with ductus venosus seat inner cavity are isolated from the outside.

Description

A kind of functional intravenous guide tube device blocked

Technical field

The utility model relates to the functional intravenous guide tube devices that one kind can block, and belong to the field of medical instrument technology.

Background technique

Venipuncture and related venoclysis are a kind of the most commonly used general technologies in clinical departments room, work as Infusion Time When longer, it is intracavitary that most-often used flexibility ductus venosus is retained in duct of Arantius, and ductus venosus flexible is eliminated because rigid during indwelling Property needle tubing front end pierce through vein risk；But during the indwelling of no medical fluid injection in ductus venosus and opening is because of part Slow blood flow or blood flow cessation easily cause blood clotting, even if arranging using the anti-coagulants such as heparin tube sealing, physiological saline washing pipe etc. Thrombus can not still be prevented by applying forms in ductus venosus inner cavity, and falling off for thrombus will lead to acute pulmonary embolism threat to life.

When limbs of patient activity is significant, blood easily enters the formation that ductus venosus inner cavity has further speeded up thrombus.

Even if the not formed thrombus in ductus venosus inner cavity, because regional flow is slow or blood flow cessation also will form at catheter opening Wall built-up thrombus or the fibrin sheath extended along catheter outer surface, not being merely blocked duct of Arantius chamber also can cause on neighbouring tunica intima of vein Thrombosis.

Patent application 201810470421.9 proposes to block ductus venosus front opening by what closure silk was externally isolated, And closure silk is assisted to can smoothly enter into ductus venosus inner cavity by guiding, but block silk in guide path opening and ductus venosus inner cavity It is advanced between open rearward end for free state progress and without the structure being coaxially oriented to, blocks silk and be difficult to easily enter ductus venosus Inner cavity.

Summary of the invention

The utility model to solve the above-mentioned problems, provides a kind of functional intravenous guide tube device that can be blocked.

Purpose of the utility model is realized as follows:

A kind of functional intravenous guide tube device blocked, comprising: for puncturing the needle tubing of skin and wall of vein, needle tubing bottom is consolidated The needle tubing seat of Ding Qinei；Ductus venosus and the ductus venosus seat being tightly connected with ductus venosus open rearward end；Needle tubing passes through vein Seal on catheter block, needle tubing front are located at ductus venosus inner cavity, and needle tubing front end is exposed from ductus venosus front opening；And Elongated moveable closure silk；Part or all of isolated part being isolated from the outside that silk will be blocked；Block silk at least tail The hollow formation of section blocks silk inner cavity, and the biggish boosting seal wire of amount of deflection, which can partly or entirely enter, blocks silk inner cavity；Guide path, it is whole Body is straight tubular portions in straight tube-like or guide path at least front end；Guide path front opening is directly or by ductus venosus seat Inner cavity is connected to ductus venosus inner cavity, and closure silk can pass through guide path under the auxiliary of boosting seal wire and enter in ductus venosus Chamber；The moving in rotation that guide path at least straight tubular portions and ductus venosus can externally be isolated is to center axis thereof and ductus venosus The position that central axis is overlapped；The closure silk and guide path that directly can be contacted and/or be in fluid communication with ductus venosus seat inner cavity are equal It is isolated from the outside.

Larger due to blocking the overall distance that is smaller and advancing of silk outer diameter, elongated closure silk at least bottom section is hollow to shape At silk inner cavity is blocked, inner cavity can be placed in that amount of deflection is larger but the boosting of the materials such as the smaller optional metal of outer diameter, carbon fiber is led Silk.

Boosting seal wire can push closure silk preferably move ahead into closure silk inner cavity, be arranged after can also assisting after accordingly connecting It moves back.

Since boosting seal wire amount of deflection is larger, when ductus venosus is in sealed condition, boosting seal wire does not enter in ductus venosus Chamber or the length for entering inner cavity are less than the 1/2 of ductus venosus length.

The guidance of boosting seal wire blocks silk tip motions to ductus venosus front opening, can then recall boosting seal wire to initial At position or ductus venosus open rearward end or boosting seal wire is withdrawn into initial position with it after blocking silk and blocking together.

Boosting seal wire can assist blocking at silk tip motions to ductus venosus open rearward end, and boosting seal wire rests on quiet at this time Arteries and veins rear end of conduit opening no longer moves ahead, then closure silk is operated alone and is moved to ductus venosus front opening, this process vein is led The pipe guiding forward as closure silk.

Boosting seal wire includes pushing and/or supporting to the auxiliary for blocking silk.

Before hollow closure silk top may also set up the outer surface closure ductus venosus for blocking silk tip portion as non-blind end End opening, the tip portion of boosting seal wire block the hollow top end opening for blocking silk.

The manipulation handle applied convenient for external force can be connected with respectively by blocking silk and boosting seal wire bottom end, block silk isolated part Bottom end is sealedly and fixedly connected directly or by the manipulation handle for blocking silk with silk is blocked.

Being further ensured that functional intravenous guide tube device in use is externally to be isolated, by boosting seal wire be also placed in one every From in component, boosting seal wire can be directly fixedly connected with the isolated part bottom end, or by the manipulation handle of boosting seal wire with should be every It is sealedly and fixedly connected from component bottom ends.

Further include the shell component being connected with guide path, blocks silk, blocks silk isolated part, boosting seal wire, boosting seal wire Isolated part is at least partly conformal to be located in shell component.

Shell component is integrally in long strip, discoid etc., can be formed by connecting by multiple components, the appearance such as respective groove is arranged inside Receive, drive and be oriented to the structure for blocking silk, isolated part.

Its function of the ductus venosus, which refers to, not only can be injected the fluids such as sterile water, medical fluid, blood, can also be by venous blood The extraction of the body fluid such as liquid, arterial blood, cerebrospinal fluid, pleural effusion is used for examining, and ductus venosus is disengaging vein, artery, pleura The bi-directional path of chamber, cavum subarachnoidale, abdominal cavity et al. coelomic split.

The guide path can be directly constituted by through-hole perforative on seal；Or one hollow passage components pass through it is close It seals body and/or ductus venosus seat, passage components inner cavity is guide path；Guide path can also by seal access and its Access on its component collectively forms.

The integrally cylindrical, strip and block of seal etc. is conformal with ductus venosus seat, by deformable elastic material or is not easy The hard material of deformation is made；Seal can also be with the sealing of ductus venosus seat and easily-deformable elastic part and lead to containing guiding The hard portions on road collectively form；It can also be and the sealing of ductus venosus seat and on-deformable hard portions and contain guide path The elastic part of easy deformation collectively form；Seal can be made of hard material and the rotatable sealing of ductus venosus seat completely Connection, can also be main body peripheral hardware elastic seal ring and the rotatable sealed connection of ductus venosus seat of hard, and cross sectional shape is preferred It, can also approximate circle or polygon for circle.

Enter ductus venosus inner cavity for the ease of blocking silk, guide path at least part may extend in ductus venosus seat Chamber even extends to ductus venosus open rearward end close to place.

It blocks silk and guide path is static or relative motion Shi Keyu ductus venosus seat cavity fluid directly contacts, vein is led Tube socket cavity fluid is excessive by the gap between guide path and closure silk and contacts with closure silk and guide path Ji Wei institute The fluid communication stated.

Guide path inner surface can be equipped with the protrusion and/or recess for blocking and preventing fluid excessive when static silk or axial movement, It forms transition fit with silk outer surface is blocked, and allows gas by not allowing fluid from；It is formed with silk outer surface is blocked Interference fit, neither allows fluid from, does not also allow gas to pass through.

The isolated part can be the deformable utricule structure that seal extends；Or the stress for hollow thin-walled Be easy to deformation may include including tubulose, oversleeve shape, discoid, foliaceous, wing shape, quant shape to external seal it is flexible every From component；Or be not easy deformation for hollow stress may include pair including tubulose, discoid, foliaceous, wing shape, quant shape The hard isolated part of external seal；Or it is easy to the flexible portion of deformation for the stress of hollow thin-walled and hollow stress is not easy It may include external including tubulose, oversleeve shape, discoid, foliaceous, wing shape, quant shape that the hard portions of deformation, which collectively constitute, The isolated part of sealing；Its inner cavity can be connected by guide path with the part that ductus venosus seat lumen contact is transfused fluid.

After needle tubing is detached from ductus venosus or is completely withdrawn from, needle tubing is relieved to guide path at least straight tubular portions rotation fortune Dynamic constraint allows the central axis of guide path at least straight tubular portions to be moved to the coincidence of ductus venosus central axis Position is overlapped and refers to that the two is conllinear and coaxial, blocks silk and be easier to through guide path, ductus venosus seat inner cavity, entrance is quiet Arteries and veins catheter proximal end.

After axial centerline is overlapped, the elongated closure silk leant out from guide path front opening is easier to enter vein Conduit cavity finally blocks ductus venosus front opening.

Guide path can also all straight tube-likes, can also straight tubular portions and the angled connection of other straight line portions, or It is connect with other curved portions.

It further include infusion connecting tube, infusion connecting tube can be connect with ductus venosus seat makes infusion connection tube cavity can be with vein The connection of catheter block inner cavity.

In order to make guide path front opening closer to ductus venosus open rearward end, guiding role is more reliable, straight tube-like Guide path or axially moving towards ductus venosus of being externally isolated of guide path straight tubular portions.

A kind of rotation mode is, seal or be connected with the part of guide path thereon and ductus venosus seat be can relative rotation Connection, seal rotation axis and ductus venosus centerline axis parallel；Between guide path central axis and rotation axis Vertical range is equal to the vertical range between ductus venosus central axis and rotation axis.

In order to preferably rotate, rotating handle can be connected on seal, ductus venosus seat is equipped with to be cooperated with rotating handle Position limiting structure and/or guide frame.

In order to avoid blocking silk in the bending of traveling process, before the length of guide path straight tubular portions is greater than or equal to it End opening is the distance between to ductus venosus open rearward end.

Difficulty, guide path straight tube are promoted caused by ductus venosus inner cavity is not easy the bending because of itself in order to ensure blocking silk The length of shape part is greater than or equal to the 1/2 of the length of ductus venosus.

Further Reliable Design is that the length of guide path straight tubular portions is greater than or equal to the length of ductus venosus.

More structurally sound, the length of guide path straight tubular portions is greater than or equal to its front opening to ductus venosus front end The distance between opening.

At least one ring week region is the contact of Fluid Sealing between guide path and closure silk outer surface, avoids medical fluid Into isolated part inner cavity.

In order to accommodate the gas in it in isolated part deformation, particularly with the isolated part of corrugated tube shape, silk is blocked Isolated part is connected with fluid epicyclic components, and isolated part inner cavity is connected to fluid epicyclic components cavity fluid.

Block that silk and isolated part are mobile, and elongated closure silk endpiece is connected with manipulation handle for the ease of driving, block silk every A part from component bottom ends and manipulation handle is tightly connected, and manipulation handle inner cavity can also be equipped with fluid epicyclic components, blocks silk isolation Member lumens are connected to fluid epicyclic components cavity fluid.

It is a kind of in order to reduce block during ductus venosus amount of deflection increase be to the scheme of the compressing of vein tube wall, it is elongated It is hollow to form closure silk inner cavity to block silk at least leading portion, top is cecum；The hollow closure silk of leading portion will not be obviously improved The amount of deflection of ductus venosus.

The various manipulation handles of such as rotating handle in the present invention by external force, can be hand drive, can also be including Driving device driving including motor.

The beneficial effects of the utility model are:

1. blocking silk can smoothly enter into ductus venosus inner cavity by coaxial guiding under boosting seal wire auxiliary.

2. during the indwelling without liquid infusion, blocking silk and blocking ductus venosus top end opening completely, blood cannot be introduced into The risk of ductus venosus inner cavity thrombosis is thoroughly eliminated in ductus venosus inner cavity.

3. ductus venosus top end opening is partially stretched out on the top for blocking silk cone under sealed condition, to eliminate part Blood flow dead space reduces the generation of wall built-up thrombus, fibrin sheath, phlebothrombosis to the greatest extent.

Detailed description of the invention

The attached drawing for not limiting to the utility model is as follows:

Figure 1A, 1B, 1C, 1D, 1E, 1F, 1G, 1H, 1I, 1J, 1K, 1L, 1M, 1N:

The structural schematic diagram of embodiment 1；

Fig. 2A, 2B: the structural schematic diagram of embodiment 2；

Specific embodiment

Limitation the embodiments of the present invention are not as follows:

Embodiment 1:

As shown in Figure 1A, 1B, 1C, 1D, 1E, 1F, 1G, 1H, 1I, 1J, 1K, 1L, 1M, 1N, the present invention includes: for puncturing The needle tubing 1 of the rigidity of skin and wall of vein, ductus venosus 2, ductus venosus seat 23, seal 25, blocks silk 3, envelope at needle tubing seat 16 Plug wire guide path 40, isolated part 5；1 inner hollow of needle tubing is syringe intracavity, and when puncture, sharp needle tubing front end was led from vein Pipe front opening 201 exposes；Needle tubing bottom is fixed in needle tubing seat 16, and needle tubing seat 16 is connected with a needle tubing seat handle 17；It is relatively soft The hollow ductus venosus 2 of property can be made of materials such as PU, FEP, and ductus venosus inner cavity 20 is led by open rearward end 202 with vein Tube socket inner cavity 230 is connected to；It is upper surface 233 between 23 front and rear end of ductus venosus seat, lower end surface 234, left side 235, the right side Side 236, ductus venosus base rear end opening in be packed with seal 25；There is a hollow infusion in ductus venosus seat left side 235 Collateral 2351 are connected with connecting tube 24, and ductus venosus seat inner cavity 230 is communicated with tube cavity 240 is connect；25 front end face 251 of seal Adjacent ductus venosus seat inner cavity 230, seal 25 is formed by connecting by hard portions 25a and elastic part 25b, hard portions 25a It can be made of resin PC, AS, ABS etc., elastic part 25b can be made of silicon rubber, polyurethane elastomeric material, elastic part The region that 25b can be passed through after needle tubing 1 detaches is closed and to external seal；It is equipped in seal hard portions 25a and blocks silk Guide path 40, the generally straight tube-like of guide path 40, guide path 40 are equipped with front opening 401 and open rearward end 402；It is elongated Closure silk 3 can from guide path open rearward end 402 enter guide path 40；Blocking is a deformable cryptomere thin-walled outside silk 3 Isolated part 5, can be made of the flexible membrane material such as silicon rubber, polyurethane, polyethylene, EVA, PET, isolated part front end 51 is equipped with Opening 501, the rear end hard portions 25a for being socketed on seal 25 that isolated part front end 51 seals lean out an extended segment 44, have Body can be tightly connected by modes such as bonding, thermal welding, ultrasonic bonding, and guide path open rearward end 402 is located at this extended segment On 44；The part that blocking silk 3 directly may contact and/or be in fluid communication with ductus venosus seat inner cavity 230 is respectively positioned in isolated part Chamber 50, the present embodiment block silk end and are fully located at isolated part inner cavity 50.

Closure silk 3 is hollow silk thread shape, can be by resin material such as PU, PA, PET, PDFE application extrusion or Shooting Technique The metal materials such as Nitinol also may be selected in molding.

Originally scheme is exemplified by driving the rotation of seal 25 to make guide path by operation shell component 8 using L3 as axis 40 central axis L2 is conllinear with ductus venosus central axis L1, blocks silk 3, isolated part 5 and is arranged with shell component 8, shell group outside The component part of part 8 can be precisely controlled the movement for blocking silk 3 and its interior boosting seal wire 6.

Figure 1A, 1B show the central axis L2 and ductus venosus central axis L1 of original state lower straighttube shape guide path 40 Not coaxial but be in parallel relation, needle tubing seat 16 is located at the lower section of isolated part 5, and 23 upper surface 233 of ductus venosus seat is equipped with arch Window 2331, interior a part for exposing seal hard portions 25a of arch window 2331, the difference is that seal hard portions There is the extension 259 for protruding from ductus venosus base rear end face 232 in the rear end 25a, is socketed with shell component 8 on extension 259 The interconnecting piece 834 of lower case member 83；Shell component 8 is whole in the form of annular discs, by lower case member 83, housing device 82, upper case member 81 And assembly disk 84 is composed；Under original state shown in Figure 1A, 1B, for lower case member 83 upper, housing device 82 is placed in the middle, on For case member 81 under, assembly disk 84 passes through lower case member central cavity 8300；To increase stability, arch window 2331 hits exactly position The reinforcing rib 2334 of the bridge like of the front and back longitudinal crossing to extend upwards is installed, seal hard portions 25a is equipped with cylindric Retention bead 2594, cylindric retention bead 2594 do not expose arch window 2331, cylindric retention bead 2594 and arch window Mouth left border 2331a offsets；Make retention bead 2594 and arch window right side boundary (figure when rotating by manipulation shell component 8 Then become the central axis L2 and ductus venosus central axis L1 coaxial state of guide path 40 when slightly) offseting.

If Fig. 1 D is shown, the extension seal hard portions 25a 259 is equipped with multiple buckles 2593,2593 insertion of buckle The pilot hole 8341 of rectangle on lower case member interconnecting piece 834, so that the two is linked together；After needle tubing 1 detaches, finger handle 83 main body of lower case member and/or coupled 8 other parts of shell component rotation are held, seal 25 can be driven same for axis along L3 Half revolution is walked, becomes the coaxial state of Fig. 1 C from the original state of Figure 1A, under, upper case member 81 occupies lower case member 83 at this time On, it is set on upper case member upper surface 814 there are three foliaceous protrusion 811；The diagonal slot in 83 left side of lower case member is also shown in Fig. 1 C 833, needle tubing seat 16 is partially located in this diagonal slot 833 before detaching.

Fig. 1 D is also shown, after needle tubing 1 detaches, line-like area 253 is closed and to external seal, 25 winding the needle tube seat of seal recess 256 is hollow, and hollow closure silk inner cavity 30 is equipped with boosting seal wire 6, and enlarged fragmentary portion shows boosting seal wire front end 61 and blocks There is certain interval on the inside of silk leading portion top 311, can also offset completely certainly；The gold such as titanium alloy, stainless steel can be selected in boosting seal wire 6 Belong to the resins such as PET, PA of material or hard to be made, the setting of boosting seal wire 6 increases the intensity of hollow closure silk 3, is convenient for It is moved forward.

Further, the rear end seal hard portions 25a for forming guide path 40 leans out an extended segment 44, extended segment 44 Outer surface and 51 inner surface of corrugated tube shape isolated part front opening part are tightly connected, and 5 end of corrugated tube shape isolated part connects There is column to manipulate handle 53, manipulation 53 upper surface of handle is provided with pilot hole 532, and manipulation 53 side of handle is connected with the fluid for being easy to expand deformation Epicyclic components 54；Manipulation 53 rear end of handle be connected with corrugated tube shape boosting seal wire isolated part 7 proximal part 71, boosting seal wire every Columnar boosting seal wire lever 73 is terminated in from 7 distal portions 72 of component, 73 upper surface of lever is provided with pilot hole 730；Lower casing It is circular ring shape holding tank 830, isolated part 5 and boosting seal wire isolation part between 83 outer ring convex ribs 832 of component and inner ring convex ribs 831 Part 7 assembles so far holding tank 830 and the interconnecting piece inner cavity 8340 communicated therewith.A groove of 83 inner ring convex ribs of lower case member more than 831 Design can be with the weight of lightening material, and reduce production cost.

As shown in Fig. 1 D and 1E, the central cavity 820 of housing device 82 is sleeved on upper case member inner ring convex ribs 812, interior 812 outer surface of ring convex muscle and housing device central cavity edge 8201 are adjacent, and the adjoining is relatively-movable contact or phase It is close；Housing device 82 is provided with arc-shaped window 821, and manipulation handle 53 is set in arc-shaped window 821；81 lower end surface of upper case member 813 are equipped with chimeric column 815, are fitted into column 815 through housing device arc-shaped window 821 and are embedded in manipulation 53 upper surface pilot hole 532 of handle It is interior, so that upper case member 81 be made to connect with isolated part 5 and closure silk 3；82 lower end surface 823 of housing device is equipped with chimeric column 826, In the chimeric insertion of column 826 manipulation 73 upper surface pilot hole 730 of handle, thus make housing device 82 and boosting seal wire isolated part 7 and Boosting seal wire 6 connects.

Further, housing device lower end surface 823 and lower case member outer ring convex ribs upper surface 8321 are adjacent, and upper case member Lower end surface 813 is then adjacent with housing device upper surface 824；84 upper surface 843 of assembly disk and lower case member central cavity 8300 Annular convex platform lower end surface 8302 (see Fig. 1 G) is adjacent, and assembly disk 84 is equipped with multiple buckles 841 straight up, assembly disk buckle 841 pass through lower case member central cavity 8300, housing device central cavity 820, the export-oriented protruding portion of final assembly disk buckle 8411 are respectively embedded on the cyclic annular convex ribs 812 of upper case member lower end surface 813 in corresponding lateral pilot hole 8120, thus by shell Component 8 assembles one；Housing device 82, upper case member 81 can be with respect to 83 relative rotation of lower case member, housing devices 82, upper casing Component 81 therebetween can also relative rotation；Obviously, upper case member 81 is to be linked together synchronous rotary with assembly disk 84；Work as rotation When the driving of upper case member 81 is located at the rotation of manipulation handle 53 in arc-shaped window 821, manipulation 53 rotating range of handle terminates in arc-shaped window Between 821 proximal boundaries 8212 and distal end boundary 8211；For convenient for finger manipulation, 82 outer rim of housing device is equipped with multiple cdontoid processes 825, and when 8331 phase of diagonal geosynclinal convex platform of the rotation of housing device 82 to the front end of proximal end cdontoid process 825 8251 and lower case member 83 To when rotation stop.

As shown in Fig. 1 F partial sectional view, when needle tubing 1 detaches, the central axis L2 of guide path 40 and ductus venosus center After axis L1 is threaded to coaxial state, the chimeric column 815 of upper case member 81 is embedded on manipulation handle 53 through housing device arc-shaped window 821 (see 1G) in end face pilot hole 532；The chimeric column 826 of housing device 82 is embedded in boosting seal wire and manipulates 73 upper surface pilot hole of handle In 730；The front end 8251 of 82 proximal end cdontoid process 825 of housing device and the diagonal geosynclinal convex platform 8331 of lower case member 83 are separate；Middle shell The front end 8252 of 82 distal end cdontoid process of component and the right boss 8342 of lower case member interconnecting piece 834 offset or close to；At this point, Finger acts on that housing device cdontoid process 825 is indicated by arrows to be rotated clockwise, and can drive boosting seal wire 6 and block silk 3 with circle Arching trajectory Forward.

It is blocked under coaxial state in silk manipulation handle inner cavity 530 and fluid epicyclic components as another angle cross-sectional view of Fig. 1 G is shown Chamber 540 is connected to.

If Fig. 1 H horizontal cross is shown under coaxial state, manipulation handle 73 is located at a point position, and boosting seal wire end 62 is fixed In it, manipulation handle 53 is located at c point position.

It is indicated by arrows to rotate clockwise housing device 82, the front end of 82 proximal end cdontoid process 825 of housing device such as Fig. 1 I 8251 offset with the diagonal geosynclinal convex platform 8331 of lower case member 83, are rotated in place；Such as Fig. 1 J partial sectional view is shown at this time, blocks silk 3 leading portion tops 311 march to ductus venosus open rearward end 202, and boosting seal wire front end 61 is located in top 311；At this point, manipulation handle 73 proceed to b point position, and manipulation handle 53 proceeds to d point position, as Fig. 1 K horizontal cross is shown.

Indicated by arrows to rotate clockwise upper case member 81 such as Fig. 1 L, driving blocks silk 3 and continues to move ahead, such as the part Fig. 1 M Cross-sectional view shows that closure silk top 311 is leant out from ductus venosus front opening 201 reaches sealed condition, is located in holding tank 830 Undulatory isolated part 5 be compressed significantly, at this point, isolated part 5 is predominantly located in interconnecting piece inner cavity 8340 in figure, and Boosting seal wire isolated part 7 is then utmostly stretched；Horizontal cross 1N shows manipulation handle 53 at this time and proceeds to e point position, And it manipulates handle 73 and is still located at b point position, the length that this design can make boosting seal wire 6 not enter ductus venosus inner cavity 20 or enter It is minimum, to ensure that hollow closure silk leading portion 31 under sealed condition will not dramatically increase the amount of deflection of ductus venosus 2, eliminate therefore It may be to the additional injuries of wall of vein；Under sealed condition, blocking silk top 311 is in conical tapered, is opened from ductus venosus front end It is prominent in mouth 201, blood vortex herein during blocking utmostly is eliminated, silk top 311 and ductus venosus front end are blocked The contact that opening 201 obstructs for blood, i.e. blood can not pass through from the two gap, and can be interference fit can also be conformal match It closes；Holding tank 830 is whole to play guiding and limit to isolated part 5, closure silk 3, boosting seal wire isolated part 7, boosting seal wire 6 Effect；It releases to block and then needs reverse operating.

The entire operation for blocking and blocking releasing carries out under the premise of being environmentally isolated to outside, no microorganism or foreign matter Into the risk of ductus venosus seat inner cavity 230.

Embodiment 2:

Clearly to show, conceal shell component 8, needle tubing 1 etc., as shown in Figure 2 A, the length L8 of straight tube-like guide path 40 is big In or equal to its front opening 401 to the distance between ductus venosus open rearward end 202 L5, such design can ensure that closure silk 3 coaxially move ahead under the constraint of straight tube-like guide path 40 can smoothly enter into ductus venosus inner cavity 20, and ductus venosus inner cavity 20 can be after It is continuous that closure silk 3 is oriented to.

A kind of scheme being experimentally verified that is length of the length L8 more than or equal to ductus venosus 2 of straight tube-like guide path 40 The 1/2 of L6 is spent, when a degree of can avoid using curved guide path 40 in this way, moulding of the bending part to silk 3 is blocked Resistance is generated when acting on and making it into ductus venosus inner cavity 20.

A kind of more structurally sound size selection is that the length L8 of straight tube-like guide path 40 is greater than or equal to ductus venosus 2 Length L6, with ensure block silk 3 do not influenced by the bending part that may be present of guide path 40 in traveling.

More structurally sound scheme is, the length L8 of straight tube-like guide path 40 is greater than or equal to its front opening 401 to quiet The distance between arteries and veins catheter proximal end opening 201 L7 is oriented to accordingly even when being the elongated closure silk 3 being easily bent in straight tube-like After carrying out moulding in access 40, still can ensure that be can smoothly enter into 20 in ductus venosus.

Fig. 2 B partial enlargement shows and is equipped with two rings week protrusion 404 in guide path front opening 401, all protrusions 404 of ring With closure 3 outer surface Interference contact of silk, the medical fluid or blood of prevention ductus venosus seat inner cavity 230 enter isolation part from the two gap Part inner cavity 50.

Claims (10)

1. the functional intravenous guide tube device that one kind can block, comprising: for puncturing the needle tubing (1) of skin and wall of vein, by needle tubing bottom Fix the needle tubing seat (16) in it；Ductus venosus (2), the ductus venosus seat being tightly connected with ductus venosus open rearward end (202) (23)；Needle tubing (1) passes through the seal (25) on ductus venosus seat (23), and needle tubing front is located at ductus venosus inner cavity (20), needle Expose from ductus venosus front opening (201) pipe front end；And elongated moveable closure silk (3)；The one of silk (3) will be blocked The isolated part (5) being partly or entirely isolated from the outside；It is characterized by also including boosting seal wire (6) and guide path (40)； It blocks the hollow formation of silk (3) at least endpiece and blocks silk inner cavity (30), boosting seal wire (6), which can partly or entirely enter, blocks silk inner cavity (30)；Guide path (40) at least front end is straight tube-like；Guide path front opening (401) is directly or by ductus venosus seat Chamber (230) is connected to ductus venosus inner cavity (20), block silk (3) boosting seal wire (6) auxiliary under pass through guide path (40) into Enter vein conduit cavity (20)；Guide path (40) at least straight tubular portions are moved with the rotation that ductus venosus (2) can externally be isolated Move the position being overlapped to center axis thereof (L2) with ductus venosus central axis (L1)；It can be straight with ductus venosus seat inner cavity (230) The closure silk (3) of contact and/or fluid communication, boosting seal wire (6) and guide path (40) are isolated from the outside.

2. the functional intravenous guide tube device that one kind according to claim 1 can block, it is characterised in that: further include by boosting seal wire (6) the boosting seal wire isolated part (7) that part or all is isolated from the outside.

3. the functional intravenous guide tube device that one kind according to claim 1 can block, it is characterised in that: ductus venosus (2) is in When sealed condition, boosting seal wire (6) does not enter ductus venosus inner cavity (20) or enters the length of inner cavity less than ductus venosus length (L6) 1/2.

4. the functional intravenous guide tube device that one kind according to claim 1 can block, it is characterised in that: it further include shell component (8), Shell component (8) is connected with guide path (40), at least partly conformal position of closure silk (3), isolated part (5), boosting seal wire (6) In shell component (8).

5. the functional intravenous guide tube device that one kind according to claim 1 can block, it is characterised in that: seal (25) or thereon Be connected with the part of guide path (40) and ductus venosus seat (23) be can relative rotation connection, seal rotation axis (L3) with Ductus venosus central axis (L1) is parallel；Vertical range between guide path central axis (L2) and rotation axis (L3) is equal to Vertical range between ductus venosus central axis (L1) and rotation axis (L3).

6. the functional intravenous guide tube device that one kind according to claim 1 can block, it is characterised in that: guide path straight tube-like portion The length (L8) divided is greater than or equal to its front opening (401) to the distance between ductus venosus open rearward end (202) (L5).

7. the functional intravenous guide tube device that one kind according to claim 1 can block, it is characterised in that: guide path straight tube-like portion The length (L8) divided is greater than or equal to the 1/2 of the length (L6) of ductus venosus.

8. the functional intravenous guide tube device that one kind according to claim 1 can block, it is characterised in that: guide path straight tube-like portion The length (L8) divided is greater than or equal to its front opening (401) to the distance between ductus venosus front opening (201) (L7).

9. the functional intravenous guide tube device that one kind according to claim 1 can block, it is characterised in that: guide path (40) and envelope At least one ring week region (404) is the contact of Fluid Sealing between plug wire outer surface.

10. the functional intravenous guide tube device that one kind according to claim 1 can block, it is characterised in that: further include and block silk (3) the connected fluid epicyclic components (54) of isolated part (5), isolated part inner cavity (50) and fluid epicyclic components inner cavity (540) It is in fluid communication；Fluid epicyclic components (54) are located in shell component (8).