CN203458649U - Flow-stop switch for in-vitro infusion conduit - Google Patents
Flow-stop switch for in-vitro infusion conduit Download PDFInfo
- Publication number
- CN203458649U CN203458649U CN201320418030.5U CN201320418030U CN203458649U CN 203458649 U CN203458649 U CN 203458649U CN 201320418030 U CN201320418030 U CN 201320418030U CN 203458649 U CN203458649 U CN 203458649U
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- China
- Prior art keywords
- fittings body
- inner chamber
- joint pedestal
- transfusion catheter
- fluid stopping
- Prior art date
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- Expired - Lifetime
Links
- 238000001802 infusion Methods 0.000 title claims abstract description 37
- 238000000338 in vitro Methods 0.000 title abstract 2
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 130
- 239000012530 fluid Substances 0.000 claims description 53
- 239000004033 plastic Substances 0.000 claims description 23
- 238000007789 sealing Methods 0.000 claims description 20
- 230000000670 limiting effect Effects 0.000 claims description 9
- 238000013016 damping Methods 0.000 claims description 4
- 230000021615 conjugation Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 3
- 239000000203 mixture Substances 0.000 abstract description 2
- 239000008280 blood Substances 0.000 description 4
- 210000004369 blood Anatomy 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 208000032843 Hemorrhage Diseases 0.000 description 1
- 208000007536 Thrombosis Diseases 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000023555 blood coagulation Effects 0.000 description 1
- 210000004204 blood vessel Anatomy 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 210000002445 nipple Anatomy 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
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- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The utility model relates to a device for introducing a medium into the body, and particularly provides a flow-stop switch for an in-vitro infusion conduit. The composition key points of the flow-stop switch are that, the flow-stop switch comprises a connector base and a connector body, the front end of the connector base is connected with an infusion conduit or an infusion member in an infusion pipeline, the back end of the connector body is connected with the infusion conduit, and the front section of the connector body is sleeved in the cavity of the connector base in a mode of being capable of advancing and retreating. The flow-stop switch is advantageous in that, the mode of preventing and eliminating negative pressure is simple, effective, operationally convenient, though use of a cut-off valve, in the meantime of eliminating negative pressure, the infusion channel is cut off, sanitation and safety are provided, the need for the connector body to be retreated during secondary infusion is ensured structurally (otherwise, the cut-off valve performs cut-off, and infusion is not enabled), so that after the completing of infusion, the connector body is provided with an advancing space for eliminating the negative pressure. The process of gradual cut-off with advancing of the connector body makes the cut-off valve be provided with the effect of a flow control valve.
Description
Technical field
This utility model relates to a kind ofly introduces the device in body by medium, particularly a kind of external transfusion catheter fluid stopping switch.
Background technology
When clinical treatment is infused, need on transfusion catheter, put a flow-stopping clip and using as fluid stopping switch, specifically illustrate visible accompanying drawing 1.When transfusion end operation flow-stopping clip, conduit, another hands transverse shifting flow-stopping clip that need hold on the other hand flow-stopping clip two make the jaw clamp conduit of flow-stopping clip with fluid stopping.During operation, the meeting that the conduit at flow-stopping clip two is difficult to avoid is because of hand-held and oppressed, particularly the conduit of flow-stopping clip front (near the termination of human body) produces negative pressure by the relieving because of after this hand-held compressing, blood can flow backwards in conduit from blood vessel, cause blood coagulation obstruction conduit, cannot again infuse, serious may produce thrombosis, to sufferer, damages.For remedy such and insufficient, traditionally after not going up flow-stopping clip clamping conduit, flow-stopping clip need to be slided toward conduit tube component direction, make conduit be extruded gradually, drive refluence blood out of, but when flow-stopping clip and conduit clamp, resistance to sliding is large, drawing conduit, easily conduit is pulled out from jaw, cause larger negative pressure, also easily conduit is elongated and attenuated simultaneously, through repeatedly drawing, serious meeting is broken conduit and is caused hemorrhage, add that conduit tube component indwelling sticks on sufferer health, catheter length is limited, if drawing is careless, conduit tube component can be pulled out to sufferer health, for fear of above-mentioned accident, occur, it is overcautious when medical worker operates, sometimes flow-stopping clip drawing length is inadequate, or can not guarantee conduit inner blood to drive totally completely.Therefore this mode of operation is loaded down with trivial details, it is large and still can not fully effective elimination negative pressure appearance that medical personnel's workload and psychological burden are all increased.
Summary of the invention
This utility model object is to overcome the deficiencies in the prior art part and provides a kind of can eliminate effective elimination negative pressure and easy to operate external transfusion catheter fluid stopping switch.
The purpose of this utility model realizes by following approach.
External transfusion catheter fluid stopping switch, it forms main points and is: comprise joint pedestal and fittings body, joint pedestal front end or plug into transfusion catheter or plug into the transfusion member on infusion pipeline, fittings body rear end and transfusion catheter are plugged into, fittings body leading portion is nested with in joint pedestal inner chamber in the mode that can advance and retreat, between fittings body and joint pedestal inner chamber, there is the space that fittings body advances, fittings body inner chamber is communicated with joint pedestal inner chamber by a kind of stop valve, this stop valve is arranged on the shutoff that above-mentioned fittings body advances in space and completes stop valve through the fittings body being advancing to the position.
Joint pedestal inner chamber forms an airtight die cavity like this, and the advance and retreat of utilizing fittings body axially to pass change airtight die cavity volume size.Fittings body is stepped back, and airtight die cavity increases; Fittings body advances, and airtight die cavity reduces, and is advancing to the position infusion channel cut-off.During transfusion work, fittings body is first stepped back, and stop valve is opened, and airtight die cavity increases, and is convenient to hold more liquid; Transfusion finishes needle tubing to be exited simultaneously, and fittings body advances, airtight die cavity from large to small, thereby fill up the space that produces negative pressure, prevent negative pressure or discharge conduit inner blood intravasation to eliminate negative pressure.This prevent negative pressure and eliminate the mode of negative pressure simple, effective, easy to operate.And the intervention of stop valve, when eliminating negative pressure, ended again infusion channel, not only health, safety more, and (otherwise stop valve ends when structure has been guaranteed again to infuse, must first to step back fittings body, cannot infuse), make transfusion finish space that rear fittings body has a propelling to eliminate negative pressure.And the process of gradually damming along with fittings body propelling makes stop valve also have the effect of flow control valve.
This external transfusion catheter fluid stopping switch can be widely used on transfusion device and on inlying catheter and on the conduit of other medical transfusion devices.
The purpose of this utility model can also realize by following approach.
Transfusion member on described infusion pipeline is in interior beyond transfusion catheter, to have the member of infusion channel.On remaining needle, this transfusion member can be remaining needle catheter component.
Because cutoff switch is in joint pedestal, rather than directly on transfusion catheter, operate as flow-stopping clip, like this, make this fluid stopping switch described in the utility model can infinitely approach forward or backward other members on infusion pipeline, thereby the cross-over connection of clipped transfusion catheter is plugged into, make infusion set overall structure compacter.
Fittings body leading portion can have various ways to be nested with in joint pedestal inner chamber:
Also include the device that a kind of adjustable diameter and screw adjusting is axially passed, the mode and the joint pedestal that through this device fittings body, are able to advancing and retreat are socketed.
The device of axially passing by adjustable diameter and screw adjusting is like this realized the axial passing of fittings body opposing tabs pedestal and retreats.
The device that adjustable diameter and screw adjusting is axially passed has multiple concrete structure available, and wherein two kinds of following discloses are a kind of:
Fittings body leading portion is plugged in joint pedestal inner chamber and with joint pedestal spiral and is connected.
Like this, swivel body is by fittings body opposing tabs pedestal helical rotation, thereby allow, fittings body opposing tabs pedestal is spiral to advance and spiral retreating.
Another kind is:
Fittings body is comprised of screw rod and lift head, screw rod leading portion is plugged in lift head inner chamber and with its spiral and is connected, screw rod is also connected with joint pedestal axial limiting, lift head is nested with in the inner chamber of joint pedestal in the mode of slippage before and after can opposing tabs pedestal, lift head intracavity posterior end is plugged into transfusion catheter, front end by stop valve with and the joint pedestal inner chamber transfusion catheter of plugging into be communicated with.
Like this, because screw rod is by axial limiting, helical rotation is broken down into idle running and moves forward and backward, and wherein dallies and is completed by screw rod, moves forward and backward and is completed by lift head.Or:
Fittings body is comprised of screw rod and lift head, screw rod tail end is exposed at outward outside joint pedestal, its leading portion is plugged in joint pedestal inner chamber and with joint pedestal axial limiting and is connected, lift head is nested with in the inner chamber of joint pedestal in the mode of slippage before and after can opposing tabs pedestal, joint pedestal inner chamber socket before lift head leading portion and screw rod, its stage casing is stretched into screw rod inner chamber and is connected with screw rod spiral by adjustable screw device after radially inside contracting, its back segment is plugged into transfusion catheter after passing screw rod inner chamber.
The place ahead of fittings body and joint pedestal spiral linkage section is provided with a kind of inner seal liner.
The screw thread that above-mentioned realization advance and retreat regulate is a kind of trapezoidal thread preferably.
Except the device that adjustable diameter and screw adjusting is axially passed, fittings body leading portion can also be nested with by this way in joint pedestal inner chamber:
Fittings body leading portion is plugged in joint pedestal inner chamber with scalable slip mode.
Further optimize and be:
Fittings body leading portion and joint pedestal inner chamber have sealing ring, and carry out being connected with damping through the sealing ring between the two.
Thisly with being connected of damping, both can realize sealing, also can strengthen feel can viscous fittings body.
Also include and a kind ofly for limiting the fittings body that slippage puts in place, be difficult to axially displaced bayonet unit again, this bayonet unit is arranged between fittings body and joint pedestal inner chamber.
No matter step back or the fittings body advancing, once slippage puts in place, before infusing operation next time, wish no longer to slide that this fittings body, bayonet unit can be used for landing nipple body and make it difficult axially displaced voluntarily.
This bayonet unit has multiple concrete structure available, and wherein two kinds of following discloses are a kind of:
Bayonet unit is a kind of Elastic buckle, forms the draw-in groove clamping putting in place through pretightning force buckle and the slippage of spring by being embedded in buckle on joint pedestal sidewall, spring and the corresponding draw-in groove being arranged on fittings body sidewall.
This Elastic buckle can be realized location, can under the effect of push-pull effort, depart from clamping again.
Another kind is:
Fittings body leading portion is plugged in joint pedestal inner chamber with scalable slippage and rotary way, bayonet unit is comprised of bayonet lock and sliding tray, bayonet lock emergence is on fittings body sidewall, sliding tray correspondence is arranged on joint pedestal intracavity sidewall, sliding tray is comprised of axial groove and transverse groove, the bayonet lock head of emergence slides in sliding tray, along axial groove, pass the fittings body put in place through rotating that sliding sleeve enters in transverse groove and with the axial clamping of joint pedestal.
Transverse groove has gradient, but oblique angle is less than Self-locking angle.
Gradient is convenient to be guided into axial groove, and be less than Self-locking angle can prevent its under the effect of axial force from line slip.
Further optimization about stop valve is:
The flap of stop valve is positioned at fittings body termination, and stop valve sealing surface is positioned at joint pedestal inner chamber to be stopped on wall.
Like this, fittings body is again valve rod.
Further optimization can be following several concrete structure, wherein also a kind of:
Fittings body inner chamber comprises vertical passageway and interconnection, rear end, vertical passageway is communicated with transfusion catheter, front end is blind to be stopped and is communicated with interconnection, interconnection is arranged in fittings body end inner core, fittings body end is less than joint pedestal inner chamber, gap between the two is communicated with interconnection as infusion channel, fittings body termination is a kind of taper and as the flap of stop valve, it is a kind of truncated cone-shaped step corresponding with this taper as the sealing surface of stop valve that joint pedestal inner chamber stops into wall, and the interior reducing of this truncated cone-shaped step is infusion channel mouth.
When fittings body cone-shaped end is when corresponding type conical bench touches, stop valve is closed; And retreat when fittings body, stop valve is opened, and transfusion enters reducing in type conical bench via fittings body vertical passageway, interconnection, radial clearance.
Or be more specifically:
Joint pedestal inner chamber is a kind of stairstepping, corresponding fittings body is also a kind of multidiameter shape and is socketed with the corresponding position of joint pedestal inner chamber, when fittings body retrude, the joint pedestal inner chamber in the Yu great footpath, fittings body end of path is corresponding, gap between the two is communicated with interconnection as infusion channel, now, the spline position of fittings body end is still socketed and is supporting fittings body with the joint pedestal inner chamber of path, but the colored groove cross-over connection at spline position is being communicated with gap and joint pedestal inner chamber and and then is being able to be communicated with the transfusion catheter in joint pedestal the place ahead.
Another kind is:
Fittings body inner chamber comprises vertical passageway, flap is a kind of a plurality of elasticity gates that are coated on fittings body termination, it is a kind of and the close-shaped corresponding step of these a plurality of elasticity gates that joint pedestal inner chamber stops into wall, step internal orifice is infusion channel, through with the touching of this step, the closed and shutoff of a plurality of elasticity gates terminates in fittings body vertical passageway mouth.
Like this, fittings body is advancing to the position, and elasticity gate is closed, stop valve cut-off; Fittings body retreats and lifts, and elasticity gate is opened because of self elasticity, and stop valve is opened.
Also have a kind of:
Fittings body inner chamber comprises vertical passageway, flap is positioned at the vertical passageway mouth of fittings body termination, it is that a kind of middle part is toward prominent protruding sharp cone distal or the truncated cone-shaped of fittings body direction that joint pedestal inner chamber stops into wall, this stops and into wall, on the circumferential position of mouth periphery, vertical passageway, is distributed with a plurality of infusion channel, through the propelling of fittings body, the stopping of this sharp cone distal or truncated cone-shaped extend into fittings body vertical passageway into the prominent protruding middle part of wall and shutoff terminates in this vertical passageway mouth.
Owing to stopping the periphery that is positioned at vertical passageway mouth into the infusion channel on wall, be positioned at the region beyond the mouth bore of vertical passageway, like this, when stopping into the prominent protruding middle part shutoff of wall during at vertical passageway mouth, this stops into the infusion channel on wall and cannot be communicated with vertical passageway, thereby is cut off.
Have again a kind of:
Fittings body front end is coated with a kind of plastic body, this plastic body leading portion is truncated cone-shaped, back segment is short cylindrical shape, corresponding position in joint pedestal inner chamber and this shape conjugation, this plastic body and this conjugate resonator form stop valve, wherein this plastic body is stop valve clack, and this conjugate resonator is stop valve sealing surface, this plastic body and this conjugate resonator tight fit connection, utilize the elasticity of plastic body to be clamp-oned in this conjugate resonator, thus when turn-offing stop valve anchor tip pedestal and lift head relatively again.
Further optimize and be:
Before and after fittings body inner chamber, run through, its rear end is communicated with transfusion catheter tube chamber, after its front end is coated by plastic body, end into blind hole, this passage is vertical passageway, at vertical passageway blind hole end, radially run through a passage and form interconnection, joint pedestal inner chamber after this conjugate resonator is ladder and amplifies, and the plastic body retreating has gap therewith between cascaded surface, this gap cross-over connection interconnection and the transfusion catheter tube chamber of plugging into joint pedestal inner chamber.
In sum, this utility model compared to existing technology tool have the following advantages: prevent negative pressure and eliminate the mode of negative pressure simple, effective, easy to operate.And the intervention of stop valve, when eliminating negative pressure, ended again infusion channel, not only health, safety more, and (otherwise stop valve ends when structure has been guaranteed again to infuse, must first to step back fittings body, cannot infuse), make transfusion finish space that rear fittings body has a propelling to eliminate negative pressure.And the process of gradually damming along with fittings body propelling makes stop valve also have the effect of flow control valve.
Accompanying drawing explanation
Fig. 1 is that in prior art, a kind of flow-stopping clip is folded in the structural representation on non small cellCatheter;
Fig. 2 is the containing needle structure schematic diagram that uses external transfusion catheter fluid stopping switch described in this utility model embodiment mono-;
Fig. 3 is the remaining needle schematic appearance of using external transfusion catheter fluid stopping switch described in this utility model embodiment mono-;
Fig. 4 be described in this utility model embodiment mono-external transfusion catheter fluid stopping switch at the structural representation of opening;
Fig. 5 be described in this utility model embodiment mono-external transfusion catheter fluid stopping switch at the structural representation of cut-off state;
Fig. 6 is the fittings body structural representation axonometric chart in external transfusion catheter fluid stopping switch described in this utility model embodiment mono-;
Fig. 7 is the containing needle structure schematic diagram that uses external transfusion catheter fluid stopping switch described in this utility model embodiment bis-;
Fig. 8 is the remaining needle schematic appearance of using external transfusion catheter fluid stopping switch described in this utility model embodiment bis-
Fig. 9 is the containing needle structure schematic diagram that uses external transfusion catheter fluid stopping switch described in this utility model embodiment tri-;
Figure 10 be described in this utility model embodiment tri-external transfusion catheter fluid stopping switch at the structural representation of opening;
Figure 11 be described in this utility model embodiment tri-external transfusion catheter fluid stopping switch at the structural representation of cut-off state;
Figure 12 be described in this utility model embodiment tetra-external transfusion catheter fluid stopping switch at the structural representation of opening;
Figure 13 be described in this utility model embodiment tetra-external transfusion catheter fluid stopping switch at the structural representation of cut-off state;
Figure 14 be described in this utility model most preferred embodiment external transfusion catheter fluid stopping switch at the structural representation of opening.
Label declaration
1 conduit tube component 2 fittings body 21 screw rod 22 lift head 23 vertical passageway 24 bayonet lock 25 interconnection 26 gap 27 spline 3 joint pedestal 31 adjustable screw device 32 sliding tray 4 transfusion catheter 5 seal rubber plug 6 sealing ring 7 stop valve 71 flap 72 sealing surface flow-stopping clips.
The specific embodiment
Embodiment mono-:
With reference to Fig. 2, a kind of remaining needle that uses external transfusion catheter fluid stopping switch described in the utility model, is comprised of conduit tube component 1, fittings body 2, joint pedestal 3, transfusion catheter 4 and seal rubber plug 5 etc.
With reference to Fig. 4, Fig. 5 and Fig. 6, external transfusion catheter fluid stopping switch, comprises joint pedestal 3 and fittings body 2, and joint pedestal 3 front ends and transfusion catheter 4 are plugged into, fittings body 2 rear ends and transfusion catheter 4 are plugged into, and fittings body 2 leading portions are plugged in joint pedestal 3 inner chambers with scalable slip mode.Fittings body 2 leading portions and joint pedestal 3 inner chambers have sealing ring 6, and carry out being connected with damping through the sealing ring 6 between the two.Between fittings body 2 and joint pedestal 3 inner chambers, there is the space that fittings body 2 advances, fittings body 2 inner chambers are communicated with joint pedestal 3 inner chambers by a kind of stop valve 7, and this stop valve 7 is arranged on the shutoff that above-mentioned fittings body 2 advances in space and completes stop valve 7 through the fittings body 2 being advancing to the position.Fittings body 2 inner chambers comprise vertical passageway 23 and interconnection 25, and 23 rear ends, vertical passageway are communicated with transfusion catheter 4, and front end is blind to be stopped and is communicated with interconnection 25, and interconnection 25 is arranged in fittings body 2 end inner cores.Joint pedestal 3 inner chambers are a kind of stairstepping, corresponding fittings body 2 is also a kind of multidiameter shape and is socketed with the corresponding position of joint pedestal 3 inner chambers, when fittings body 2 retrude, the joint pedestal inner chamber in the Yu great footpath, fittings body end of path is corresponding, gap 26 between the two is communicated with interconnection as infusion channel, now, spline 27 positions of fittings body 2 ends are still socketed with the joint pedestal inner chamber of path, thereby supporting preferably fittings body 2, but the colored groove cross-over connection at spline position is being communicated with gap 26 and joint pedestal 3 inner chambers and and then is being able to be communicated with the transfusion catheter 4 in joint pedestal 3 the place aheads.Fittings body 2 terminations are a kind of taper type and as the flap 71 of stop valve 7, and it is a kind of truncated cone-shaped step corresponding with this taper type as the sealing surface 72 of stop valve that joint pedestal 3 inner chambers stop into wall, and the interior reducing of this truncated cone-shaped step is infusion channel mouth.
When fittings body taper type termination is when corresponding type conical bench touches, stop valve is closed; And retreat when fittings body, stop valve is opened, and transfusion enters reducing in type conical bench via fittings body vertical passageway 23, interconnection 25, radial clearance 26, spline 27 grooves.
With reference to Fig. 3, also include and a kind ofly for limiting the fittings body that slippage puts in place, be difficult to again axially displaced bayonet unit, this bayonet unit is arranged between joint 2 and joint pedestal 3 inner chambers.
Bayonet unit is comprised of bayonet lock 24 and sliding tray 32, bayonet lock 24 emergences are on fittings body 2 sidewalls, sliding tray 32 correspondences are arranged on joint pedestal 3 sidewalls, sliding tray 32 is comprised of axial groove and transverse groove, 24 of the bayonet locks of emergence slide in sliding tray, along axial groove, pass the fittings body 2 put in place through rotating that sliding sleeve enters in transverse groove and with the axial clamping of joint pedestal 3.
It is same as the prior art that the present embodiment is not stated part.
Embodiment bis-:
With reference to Fig. 7 and Fig. 8, external transfusion catheter fluid stopping switch, this fluid stopping switch application is on remaining needle, different from embodiment mono-, and joint pedestal 3 front ends in the present embodiment are directly connected with the conduit tube component 1 of remaining needle.
The present embodiment figure place part is identical with embodiment mono-.
Embodiment tri-:
With reference to Fig. 9, Figure 10 and Figure 11, external transfusion catheter fluid stopping switch, by this fluid stopping switch application on remaining needle, different from embodiment mono-is, there is a kind of adjustable screw device 31, fittings body leading portion be plugged in joint pedestal inner chamber and by this spiral regulating device 31 be connected with joint pedestal spiral.Like this, swivel body 2 allows fittings body 2 opposing tabs pedestal 3 helical rotation, thereby allow, fittings body opposing tabs pedestal is spiral to advance and spiral retreating.
The present embodiment do not state part with embodiment mono-identical.
Embodiment tetra-:
With reference to Figure 12 and Figure 13, external transfusion catheter fluid stopping switch, has a kind of adjustable screw device 31, and by this fluid stopping switch application, on transfusion device, fittings body leading portion is plugged in joint pedestal inner chamber and by this adjustable screw device 31 and is connected with joint pedestal 3 spirals.Like this, swivel body 2 allows fittings body 2 opposing tabs pedestal 3 helical rotation, thereby allow, fittings body opposing tabs pedestal is spiral to advance and spiral retreating.Fittings body 2 inner chambers comprise vertical passageway 23, fittings body 2 inner spindle form vertical passageway 23 to running through, these 23 rear ends, vertical passageway are communicated with transfusion catheter 4 tube chambers, stop valve clack 71 is a kind of a plurality of elasticity gates that are coated on fittings body 2 front ends, it is a kind of with the close-shaped corresponding step of these a plurality of elasticity gates and as stop valve sealing sealing surface 72 that joint pedestal 3 inner chambers stop into wall, step internal orifice is infusion channel, through with the touching of this step, the closed and shutoff of a plurality of elasticity gates terminates in 23 mouthfuls of fittings body vertical passageways.
Like this, fittings body 2 is advancing to the position, and elasticity gate is closed, stop valve 7 cut-offs; Fittings body 2 retrudes, elasticity gate is opened because of self elasticity, and stop valve 7 is opened.
The present embodiment do not state part with embodiment mono-identical.
Most preferred embodiment:
With reference to Figure 14, external transfusion catheter fluid stopping switch, by this fluid stopping switch application, on transfusion device, fittings body 2 is comprised of screw rod 21 and lift head 22, screw rod 21 tail ends are exposed at outward outside joint pedestal 3, and its leading portion is plugged in joint pedestal 3 inner chambers and with joint pedestal 3 axial limitings and is connected.Lift head 22 is nested with in the inner chamber of joint pedestal 3 in mode that can the 3 front and back slippages of opposing tabs pedestal, joint pedestal 3 inner chamber sockets before lift head 22 leading portions and screw rod 21, its stage casing is stretched into screw rod 21 inner chambers and is connected with screw rod spiral by adjustable screw device 31 after radially inside contracting, its back segment is plugged into transfusion catheter 4 after passing screw rod inner chamber, between lift head 22 leading portions and joint pedestal 3 inner chambers, is provided with sealing ring 6.Lift head 22 has vertical passageway 23 and interconnection 25, before and after lift head 22 inner chambers, run through, its rear end is communicated with transfusion catheter 4 tube chambers, after its front end is coated by a plastic body, end into blind hole, this passage is 23， vertical passageway, vertical passageway 23 blind hole ends and radially runs through a passage composition interconnection 25.The coated plastic body front end of lift head 22 front ends is truncated cone-shaped, rear end is short cylindrical shape, corresponding position in joint pedestal 3 inner chambers and this shape conjugation, this plastic body and this conjugate resonator form stop valve 7, and wherein this plastic body is stop valve clack 71, and this conjugate resonator is stop valve sealing surface 72.This plastic body and this conjugate resonator tight fit connection, utilize the elasticity of plastic body to be clamp-oned in this conjugate resonator, thus when turn-offing stop valve anchor tip pedestal 3 and lift head 22 relatively again.Joint pedestal 3 inner chambers after this conjugate resonator are ladder and amplify, and the plastic body retreating has gap 26 therewith between cascaded surface, this gap 26 cross-over connection interconnections 25 and transfusion catheter 4 tube chambers of plugging into joint pedestal inner chamber.
Like this, rotate screw rod 21, lift head 22 is elastic, pushes ahead stop valve 7 cut-offs that put in place, draws back, and stop valve 7 is opened.
It is identical with embodiment mono-that the present embodiment is not stated part.
Claims (22)
1. external transfusion catheter fluid stopping switch, it is characterized in that, comprise joint pedestal and fittings body, joint pedestal front end or plug into transfusion catheter or plug into the transfusion member on infusion pipeline, fittings body rear end and transfusion catheter are plugged into, fittings body leading portion is nested with in joint pedestal inner chamber in the mode that can advance and retreat, between fittings body and joint pedestal inner chamber, there is the space that fittings body advances, fittings body inner chamber is communicated with joint pedestal inner chamber by a kind of stop valve, this stop valve is arranged on the shutoff that above-mentioned fittings body advances in space and completes stop valve through the fittings body being advancing to the position.
2. external transfusion catheter fluid stopping switch according to claim 1, is characterized in that, the transfusion member on described infusion pipeline is in interior beyond transfusion catheter, to have the member of infusion channel.
3. external transfusion catheter fluid stopping switch according to claim 1, is characterized in that, the transfusion member on described infusion pipeline is remaining needle catheter component.
4. external transfusion catheter fluid stopping switch according to claim 1, is characterized in that, also includes the device that a kind of adjustable diameter and screw adjusting is axially passed, and the mode and the joint pedestal that through this device fittings body, are able to advancing and retreat are socketed.
5. external transfusion catheter fluid stopping switch according to claim 4, is characterized in that, fittings body leading portion is plugged in joint pedestal inner chamber and with joint pedestal spiral and is connected.
6. external transfusion catheter fluid stopping switch according to claim 4, it is characterized in that, fittings body is comprised of screw rod and lift head, screw rod leading portion is plugged in lift head inner chamber and with its spiral and is connected, screw rod is also connected with joint pedestal axial limiting, lift head is nested with in the inner chamber of joint pedestal in the mode of slippage before and after can opposing tabs pedestal, lift head intracavity posterior end is plugged into transfusion catheter, front end by stop valve with and the joint pedestal inner chamber transfusion catheter of plugging into be communicated with.
7. external transfusion catheter fluid stopping switch according to claim 4, it is characterized in that, fittings body is comprised of screw rod and lift head, screw rod tail end is exposed at outward outside joint pedestal, its leading portion is plugged in joint pedestal inner chamber and with joint pedestal axial limiting and is connected, lift head is nested with in the inner chamber of joint pedestal in the mode of slippage before and after can opposing tabs pedestal, joint pedestal inner chamber socket before lift head leading portion and screw rod, its stage casing is stretched into screw rod inner chamber and is connected with screw rod spiral by adjustable screw device after radially inside contracting, its back segment is plugged into transfusion catheter after passing screw rod inner chamber.
8. according to the external transfusion catheter fluid stopping switch described in claim 1 or 4 or 5 or 6 or 7, it is characterized in that, the place ahead of fittings body and joint pedestal spiral linkage section is provided with a kind of inner seal liner.
9. according to the external transfusion catheter fluid stopping switch described in claim 4 or 5 or 6 or 7, it is characterized in that, the screw thread that above-mentioned realization advance and retreat regulate is a kind of trapezoidal thread.
10. external transfusion catheter fluid stopping switch according to claim 1, is characterized in that, fittings body leading portion is plugged in joint pedestal inner chamber with scalable slip mode.
11. external transfusion catheter fluid stopping switches according to claim 1, it is characterized in that, fittings body leading portion is plugged in joint pedestal inner chamber with scalable slip mode, fittings body leading portion and joint pedestal inner chamber have sealing ring, and carry out being connected with damping through the sealing ring between the two.
12. external transfusion catheter fluid stopping switches according to claim 1, it is characterized in that, fittings body leading portion is plugged in joint pedestal inner chamber with scalable slip mode, also include and a kind ofly for limiting the fittings body that slippage puts in place, be difficult to axially displaced bayonet unit again, this bayonet unit is arranged between fittings body and joint pedestal inner chamber.
13. external transfusion catheter fluid stopping switches according to claim 12, it is characterized in that, bayonet unit is a kind of Elastic buckle, by being embedded in buckle on joint pedestal sidewall, spring and the corresponding draw-in groove being arranged on fittings body sidewall, form the draw-in groove clamping putting in place through pretightning force buckle and the slippage of spring.
14. external transfusion catheter fluid stopping switches according to claim 12, it is characterized in that, fittings body leading portion is plugged in joint pedestal inner chamber with scalable slippage and rotary way, bayonet unit is comprised of bayonet lock and sliding tray, bayonet lock emergence is on fittings body sidewall, sliding tray correspondence is arranged on joint pedestal intracavity sidewall, sliding tray is comprised of axial groove and transverse groove, the bayonet lock head of emergence slides in sliding tray, along axial groove, pass the fittings body put in place through rotating that sliding sleeve enters in transverse groove and with the axial clamping of joint pedestal.
15. external transfusion catheter fluid stopping switches according to claim 14, it is characterized in that, transverse groove has gradient, but oblique angle are less than Self-locking angle.
16. external transfusion catheter fluid stopping switches according to claim 1, is characterized in that, the flap of stop valve is positioned at fittings body termination, and stop valve sealing surface is positioned at joint pedestal inner chamber to be stopped on wall.
17. external transfusion catheter fluid stopping switches according to claim 1, it is characterized in that, fittings body inner chamber comprises vertical passageway and interconnection, rear end, vertical passageway is communicated with transfusion catheter, front end is blind to be stopped and is communicated with interconnection, interconnection is arranged in fittings body end inner core, fittings body end is less than joint pedestal inner chamber, gap between the two is communicated with interconnection as infusion channel, fittings body termination is a kind of taper and as the flap of stop valve, it is a kind of truncated cone-shaped step corresponding with this taper as the sealing surface of stop valve that joint pedestal inner chamber stops into wall, the interior reducing of this truncated cone-shaped step is infusion channel mouth.
18. external transfusion catheter fluid stopping switches according to claim 17, it is characterized in that, joint pedestal inner chamber is a kind of stairstepping, corresponding fittings body is also a kind of multidiameter shape and is socketed with the corresponding position of joint pedestal inner chamber, when fittings body retrude, the joint pedestal inner chamber in the Yu great footpath, fittings body end of path is corresponding, gap between the two is communicated with interconnection as infusion channel, now, the spline position of fittings body end is still socketed and is supporting fittings body with the joint pedestal inner chamber of path, but the colored groove cross-over connection at spline position is being communicated with gap and joint pedestal inner chamber and and then is being able to be communicated with the transfusion catheter in joint pedestal the place ahead.
19. external transfusion catheter fluid stopping switches according to claim 1, it is characterized in that, fittings body inner chamber comprises vertical passageway, flap is a kind of a plurality of elasticity gates that are coated on fittings body termination, it is a kind of and the close-shaped corresponding step of these a plurality of elasticity gates that joint pedestal inner chamber stops into wall, step internal orifice is infusion channel, through with the touching of this step, the closed and shutoff of a plurality of elasticity gates terminates in fittings body vertical passageway mouth.
20. external transfusion catheter fluid stopping switches according to claim 1, it is characterized in that, fittings body inner chamber comprises vertical passageway, flap is positioned at the vertical passageway mouth of fittings body termination, it is that a kind of middle part is toward prominent protruding sharp cone distal or the truncated cone-shaped of fittings body direction that joint pedestal inner chamber stops into wall, this stops and into wall, on the circumferential position of mouth periphery, vertical passageway, is distributed with a plurality of infusion channel, through the propelling of fittings body, the stopping of this sharp cone distal or truncated cone-shaped extend into fittings body vertical passageway into the prominent protruding middle part of wall and shutoff terminates in this vertical passageway mouth.
21. external transfusion catheter fluid stopping switches according to claim 1, it is characterized in that, fittings body front end is coated with a kind of plastic body, this plastic body leading portion is truncated cone-shaped or taper shape, corresponding position in joint pedestal inner chamber and this shape conjugation, this plastic body and this conjugate resonator form stop valve, wherein this plastic body is stop valve clack, this conjugate resonator is stop valve sealing surface, this plastic body and this conjugate resonator tight fit connection, utilize the elasticity of plastic body to be clamp-oned in this conjugate resonator, thereby anchor tip pedestal and lift head relatively again when turn-offing stop valve.
22. external transfusion catheter fluid stopping switches according to claim 21, it is characterized in that, before and after fittings body inner chamber, run through, its rear end is communicated with transfusion catheter tube chamber, after its front end is coated by plastic body, end into blind hole, this passage is vertical passageway, at vertical passageway blind hole end, radially run through a passage and form interconnection, joint pedestal inner chamber after this conjugate resonator is ladder and amplifies, the plastic body retreating has gap therewith between cascaded surface, this gap cross-over connection interconnection and the transfusion catheter tube chamber of plugging into joint pedestal inner chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320418030.5U CN203458649U (en) | 2013-07-13 | 2013-07-13 | Flow-stop switch for in-vitro infusion conduit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320418030.5U CN203458649U (en) | 2013-07-13 | 2013-07-13 | Flow-stop switch for in-vitro infusion conduit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203458649U true CN203458649U (en) | 2014-03-05 |
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ID=50171030
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320418030.5U Expired - Lifetime CN203458649U (en) | 2013-07-13 | 2013-07-13 | Flow-stop switch for in-vitro infusion conduit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203458649U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106267449A (en) * | 2015-05-14 | 2017-01-04 | 广东龙心医疗器械有限公司 | Single use preventing thrombosis remaining needle |
| CN107137793A (en) * | 2017-06-20 | 2017-09-08 | 滕巧 | A kind of retractable drainage pipe connection |
-
2013
- 2013-07-13 CN CN201320418030.5U patent/CN203458649U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106267449A (en) * | 2015-05-14 | 2017-01-04 | 广东龙心医疗器械有限公司 | Single use preventing thrombosis remaining needle |
| CN106267449B (en) * | 2015-05-14 | 2020-03-17 | 广东龙心医疗器械有限公司 | Disposable anti-thrombus indwelling needle |
| CN107137793A (en) * | 2017-06-20 | 2017-09-08 | 滕巧 | A kind of retractable drainage pipe connection |
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