CN100475283C - Intravenous catheter setting device with back-suction force - Google Patents
Intravenous catheter setting device with back-suction force Download PDFInfo
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- CN100475283C CN100475283C CNB2006100902627A CN200610090262A CN100475283C CN 100475283 C CN100475283 C CN 100475283C CN B2006100902627 A CNB2006100902627 A CN B2006100902627A CN 200610090262 A CN200610090262 A CN 200610090262A CN 100475283 C CN100475283 C CN 100475283C
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- push rod
- syringe
- setting device
- intravenous catheter
- activation members
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Abstract
The invention relates to a vein inner duct setting device having the pumping back force, which comprises a syringe, a needle group and a push rod. The needle group has a locating piece positioned in the syringe, a needle seat limited between the locating piece and the syringe, a needle body threading through the syringe, a duct seat nested on the syringe, and a pliability duct associated with the duct seat and for the threading out of the needle body. The push rod has an air port communicated with the air pressure outside, and a startup piece can be nested with the needle seat for combination, the startup piece has a flow way communicating the syringe and the air port. thereby, when the air port is sealed, the inside of the syringe can maintain the close state, so the operation of blood inducing can be conducted, when the air port is open, the backstreaming blood can flow into the flow way of the startup piece, and thereby the startup piece is started to continuously drive the motion of the needle seat and the needle body to be hidden in the push rod. The invention provides the vein inner duct setting device having the pumping back force that can avoid the seepage of blood when meeting misoperations, so the invention is fit for the actual practice.
Description
Technical field
The present invention relates to a kind of intravenous catheter setting device, particularly relate to and a kind ofly can hide needle body and have back-suction, can be by controlling opening and closing of QI KOU, has the backflow of taking a sample test blood function, and can be when hiding this needle body, the blood of backflow is fled to the runner of this activation members, and outside seepage not, can reach simple, fast and the intravenous catheter setting device with back-suction of safety medical treatment operation.
Background technology
General clinical treatment, when patient is implemented in the blood vessel transfusion fluid infusion, often by transfusion catheter being set in the blood vessel to continue the infusion infusion, see also shown in Figure 1, it is a cutaway view of general existing intravenous catheter setting device, with general catheter setting device 9 is example, mainly include a needle stand 91, be connected with these needle stand 91 belled catheter blocks 92, with this catheter block 92 and a conduit 93 that the hollow flexible is curved, and a needle body 94 that is connected and passes this conduit 93 with this needle stand 91.When medical personnel grip this needle stand 91, and puncture in the blood vessel of animal body with this needle body 94, just can guide this conduit 93 intravasations, and can be after this needle body 94 be extracted out, this conduit 93 is retained in the blood vessel, and, can avoid animal body that uncomfortable sensation is arranged with the curved characteristic of these conduit 93 flexibles.At this moment, this catheter block 92 can supply the transfer line (not shown) of drop or be filled with the syringe cylinder (not shown) connection of medicament, carries out the action of transfusion injection in the blood vessel.
Only, though this catheter setting device 9 can be as the media of injection medicament or blood drawing, but can't avoid in operating process, having this needle body 94 improper exposed situations, so it is as long as careless slightly, the anxiety that the medical personnel of stabbing will be arranged, even cause the danger of pain of injury fatal infection disease infection, importantly, this catheter setting device 9 does not have the function of taking a sample test blood, therefore, when patient's blood pressure deficiency so that blood when refluxing, or patient's target blood is indeterminate and need to survey the property puncture (as obesity, old age or female patient) time, just can't declare fast and know whether this needle body 94 correctly is set in the blood vessel with this conduit 93, and the action of having to puncture repeatedly, prolong and cause having the operating time, increase injury and the chance that infects, even shortcoming such as the Biohazard Waste of increasing is arranged.
Therefore, in order to improve aforementioned catheter setting device 9 disappearance in the use, No. 91115946, the Chinese patent " syringe " that the previous institute of this case applicant researches and develops and applies for back-suction, No. 91134962 " safety device " with injection and blood drawing function, No. 92109392 " deserted syringe ", No. 93112143 application for a patent for invention cases such as " syringes " with back-suction, mainly be to produce back-suction, and has the function of taking a sample test blood, and after the conduit setting is finished, can and be accommodated in the syringe the needle body pumpback, can avoid stabbing medical personnel.
Only, this case inventor is as satisfying, still adhering to excelsior spirit, continue to be engaged in the developmental research that is relevant to catheter setting device, thereby find that former invention is when this needle body of pumpback, meeting is pushed out the blood that originally be back in this syringe outside this syringe, and still has blood contamination environment or personnel's doubt.
This shows that above-mentioned existing intravenous catheter setting device obviously still has inconvenience and defective, and demands urgently further being improved in structure and use.In order to solve the problem of above-mentioned existence, relevant manufacturer there's no one who doesn't or isn't seeks solution painstakingly, but do not see always that for a long time suitable design finished by development, and common product does not have appropriate structure to address the above problem, this obviously is the problem that the anxious desire of relevant dealer solves.Therefore how to found a kind of intravenous catheter setting device of new structure with back-suction, real one of the current important research and development problem that belongs to, also becoming the current industry utmost point needs improved target.
Because the defective that above-mentioned existing intravenous catheter setting device exists, the inventor is based on being engaged in this type of product design manufacturing abundant for many years practical experience and Professional knowledge, and the utilization of cooperation scientific principle, constantly detailed think of funiculus and the skilful intelligence of utilization, actively researched and developed with great concentration, in the hope of founding a kind of intravenous catheter setting device of new structure with back-suction, can improve general existing intravenous catheter setting device, make it have more practicality.Through constantly research, design, and, create the present invention who has practical value finally through after studying sample and improvement repeatedly.
Summary of the invention
The objective of the invention is to, overcome the defective that existing intravenous catheter setting device exists, and can avoiding the improper outside seepage of blood and having the intravenous catheter setting device of back-suction of a kind of new structure is provided, thereby be suitable for practicality more.
The object of the invention to solve the technical problems realizes by the following technical solutions.According to a kind of intravenous catheter setting device with back-suction that the present invention proposes, it comprises: a syringe, have a surrounding wall that centers on an axis and define a duct, and this surrounding wall has a reverse arrival end and a port of export; One pin group, positioning piece, a needle stand, a needle body, a catheter block with hollow, an and flexible conduit, this keeper is to fix in this syringe duct, this needle stand is spacing between this syringe port of export and this keeper, and this needle body is fixed with this needle stand conducting, and has a cutting tip that passes this syringe port of export, this catheter block is to be nested with at this syringe surrounding wall and in abutting connection with this syringe port of export, and this conduit is to be connected with this catheter block and to pass for this needle body cutting tip; An and push rod, be to be set in this syringe duct, and tool is around this axis and define a tube wall of a tube chamber, being communicated with ambient pressure controls with this tube chamber and by the operator and opens, at least one QI KOU of closing, be set in this intraluminal activation members, an and gas-pervious diaphragm sheet, this tube wall has the forward open end towards this pin group, and be in reverse to this forward open end one the back sealing end, this QI KOU is that row leads this intraluminal air pressure, this activation members is this tube wall forward open end of sealing, and has a runner that runs through and hold backflow blood along this axis direction, and form at one end and with a fit portion of this needle stand fit, this diaphragm sheet is to intercept between this runner and this QI KOU, this push rod is to push this keeper towards this syringe port of export displacement, and remove the fixing positioning relation of this keeper and this needle stand, and start this activation members synchronously, this this needle stand of activation members interlock is goed deep in the tube chamber of this push rod, and, this needle body is hidden in this tube wall towards this direction displacement of sealing end afterwards.
The object of the invention to solve the technical problems also can be applied to the following technical measures to achieve further.
Aforesaid intravenous catheter setting device with back-suction, the activation members of wherein said push rod also have a port that is in reverse to this fit portion and is formed on the other end, and this diaphragm sheet is arranged in the port of this activation members, and this runner one end of blockading ventilatively.
Aforesaid intravenous catheter setting device with back-suction, wherein said push rod also have and are nested with at this tube wall and in abutting connection with a gas seal member of this forward open end, and this gas seal member is that the syringe surrounding wall is airtight contacts with this.
Aforesaid intravenous catheter setting device with back-suction, the QI KOU of wherein said push rod is formed in this tube wall, and is is directly opened and closed with this QI KOU of finger Synchronization Control that grips this push rod by the operator.
Aforesaid intravenous catheter setting device with back-suction, the tube wall of wherein said push rod also has most fins that are formed on an outer surface and contiguous this back sealing end, aforementioned fin is to be limited to this syringe arrival end, and the stroke that this push rod is goed deep in this syringe duct is limited by aforementioned fin.
Aforesaid intravenous catheter setting device with back-suction, the QI KOU of wherein said push rod are formed in the back sealing end of this tube wall, and are are directly opened and closed with this QI KOU of finger Synchronization Control that grips this push rod by the operator.
Aforesaid intravenous catheter setting device with back-suction, wherein said push rod also have an end cap of sealing end behind this tube wall of sealing.
Aforesaid intravenous catheter setting device with back-suction, wherein said QI KOU is formed in this end cap, and is is directly opened and closed with this QI KOU of finger Synchronization Control that grips this push rod by the operator.
Aforesaid intravenous catheter setting device with back-suction, wherein said push rod also have and the airtight cover plate that engages of this QI KOU.
Aforesaid intravenous catheter setting device with back-suction, wherein this intravenous catheter setting device also includes a bullet and opens the formula flexible member, this flexible member is that extruding is contained in this syringe, and has a abutment end against this syringe port of export, reach one of this needle stand of pushing and withstanding and bounce up end, this bounces up end is after this push rod is removed the fixing positioning relation of this keeper and this needle stand and started this activation members, this needle stand of pushing and withstanding and this activation members are goed deep in the tube chamber of this push rod, and towards this direction displacement of sealing end afterwards.
Aforesaid intravenous catheter setting device with back-suction, wherein this intravenous catheter setting device also includes a bullet and opens the formula flexible member, this flexible member is that extruding is contained in this push rod, and has a abutment end against this tube wall forward open end, reach one of this activation members of pushing and withstanding and bounce up end, this bounces up end is after this push rod is removed the fixing positioning relation of this keeper and this needle stand and started this activation members, this activation members of pushing and withstanding drives in the tube chamber that this needle stand gos deep into this push rod, and towards the direction displacement of this back sealing end.
Aforesaid intravenous catheter setting device with back-suction, wherein this intravenous catheter setting device also includes a contraction type flexible member, this flexible member is that tension is contained in this push rod, and has a positioning end that is positioned at contiguous this back sealing end of this tube wall, an and traction end of this activation members of binding, this traction end is after this push rod is removed the fixing positioning relation of this keeper and this needle stand and started this activation members, draw this activation members and drive in the tube chamber that this needle stand gos deep into this push rod, and towards the direction displacement of this back sealing end.
Aforesaid intravenous catheter setting device with back-suction, wherein this intravenous catheter setting device also includes a contraction type flexible member, and this push rod also has an end cap of sealing end behind this tube wall of sealing, this flexible member is that tension is contained in this push rod, and has a positioning end that is positioned at this end cap, an and traction end of this activation members of binding, this traction end is after this push rod is removed the fixing positioning relation of this keeper and this needle stand and started this activation members, draw this activation members and drive in the tube chamber that this needle stand gos deep into this push rod, and towards the direction displacement of this back sealing end.
The present invention compared with prior art has tangible advantage and beneficial effect.As known from the above, in order to achieve the above object, the invention is characterized in: this intravenous catheter setting device with back-suction comprises a syringe, a pin group and a push rod.This syringe has a surrounding wall that centers on an axis and define a duct, and this surrounding wall has a reverse arrival end and a port of export.This pin group has positioning piece, a catheter block, a pliability conduit, a needle stand and a needle body of hollow, this keeper is to fix in this syringe duct movablely, this needle stand is spacing between this syringe port of export and this keeper, this needle body is fixed with this needle stand conducting, and has a cutting tip that passes this syringe port of export, this catheter block is detachable liftoff being nested with at this syringe surrounding wall and in abutting connection with this syringe port of export, and this conduit is to be connected with this catheter block and to pass for this needle body cutting tip.This push rod is to be set in this syringe duct movablely, and tool is around this axis and define a tube wall of a tube chamber, be communicated with ambient pressure with this tube chamber and can control by the operator and open, at least one QI KOU of closing, be set in this intraluminal activation members, an and ventilative diaphragm sheet, this tube wall has the forward open end towards this pin group, and be in reverse to this forward open end one the back sealing end, this QI KOU is can arrange to lead this intraluminal air pressure, this activation members is this tube wall forward open end of detachable liftoff sealing, and has a runner that runs through and can hold backflow blood along this axis direction, an and fit portion that forms at one end and can fix with this needle stand, this diaphragm sheet is to intercept between this runner and this QI KOU, this push rod can be pushed this keeper towards this syringe port of export displacement, and remove the fixing positioning relation of this keeper and this needle stand, and synchronous this activation members that starts, this this needle stand of activation members interlock is goed deep in the tube chamber of this push rod, and, this needle body is hidden in this tube wall towards this direction displacement of sealing end afterwards.
By technique scheme, the intravenous catheter setting device that the present invention has back-suction has following advantage at least: special efficacy of the present invention is can be by controlling opening and closing of this QI KOU, has the function of taking a sample test backflow blood, and can be when hiding this needle body, the blood of backflow is fled to the runner of this activation members, and outside seepage not can reach simple, quick and safe medical procedures.
In sum, the invention provides a kind of intravenous catheter setting device that can avoid the improper outside seepage of blood and have back-suction, comprise a syringe, a pin group and a push rod.This pin group have the positioning piece that is positioned in this syringe, spacing between this keeper and this syringe a needle stand, pass this syringe a needle body, be nested with a catheter block at this syringe, and be connected with this catheter block and a pliability conduit that this needle body of confession passes.This push rod has a QI KOU that is communicated with ambient pressure, and can with an activation members of this needle stand fit, this activation members has a runner that is communicated with this syringe and this QI KOU.Whereby, when this QI KOU is closed, can make to keep airtight conditions in this syringe, the operation of drawing blood, when this QI KOU by opening, the blood of backflow is fled to the runner of this activation members, and borrow to start this this needle stand of activation members interlock and this needle body is hidden in this push rod.The present invention has above-mentioned plurality of advantages and practical value, no matter it all has bigger improvement on product structure or function, obvious improvement is arranged technically, and produced handy and practical effect, and more existing intravenous catheter setting device has the outstanding effect of enhancement, thereby being suitable for practicality more, really is a new and innovative, progressive, practical new design.
Above-mentioned explanation only is the general introduction of technical solution of the present invention, for can clearer understanding technological means of the present invention, and can be implemented according to the content of description, and for above-mentioned and other purposes, feature and advantage of the present invention can be become apparent, below especially exemplified by preferred embodiment, and conjunction with figs., be described in detail as follows.
Description of drawings
Fig. 1 is a cutaway view of general existing intravenous catheter setting device.
Fig. 2 is the view sub-anatomy that the present invention has intravenous catheter setting device first preferred embodiment of back-suction.
Fig. 3 is the structure cutaway view after the combination of intravenous catheter setting device first preferred embodiment of the present invention with back-suction.
Fig. 4 is that the present invention has the cutaway view that two QI KOU in intravenous catheter setting device first preferred embodiment of back-suction are opening.
Fig. 5 is that the present invention has that a push rod is moved to a cutaway view that contacts with positioning piece in intravenous catheter setting device first preferred embodiment of back-suction.
Fig. 6 is that the present invention has in intravenous catheter setting device first preferred embodiment of back-suction this push rod and pushes the cutaway view that this keeper is moved to a shoulder that is hampered by a syringe.
Fig. 7 is that the present invention has that a flexible member bounces up a needle stand and an activation members in intravenous catheter setting device first preferred embodiment of back-suction, and interlock one needle body is hidden in a cutaway view in this push rod synchronously.
Fig. 8 is that the present invention has the cutaway view that two QI KOU in intravenous catheter setting device first preferred embodiment of back-suction are closed state.
Fig. 9 is the cutaway view that the present invention has intravenous catheter setting device second preferred embodiment of back-suction.
Figure 10 is that the present invention has that a flexible member draws an activation members and a needle stand in intravenous catheter setting device second preferred embodiment of back-suction, and interlock one needle body is hidden in a cutaway view in this push rod synchronously,
Figure 11 is the cutaway view that the present invention has intravenous catheter setting device the 3rd preferred embodiment of back-suction.
Figure 12 is that the present invention has that a flexible member draws an activation members and a needle stand in intravenous catheter setting device the 3rd preferred embodiment of back-suction, and interlock one needle body is hidden in a cutaway view in this push rod synchronously.
Figure 13 is the cutaway view that the present invention has intravenous catheter setting device the 4th preferred embodiment of back-suction.
Figure 14 is the cutaway view that the present invention has intravenous catheter setting device the 5th preferred embodiment of back-suction.
Figure 15 is the cutaway view that the present invention has intravenous catheter setting device the 6th preferred embodiment of back-suction.
Figure 16 is the cutaway view that the present invention has intravenous catheter setting device the 7th preferred embodiment of back-suction.
Figure 17 is the cutaway view that the present invention has intravenous catheter setting device the 8th preferred embodiment of back-suction.
The specific embodiment
Reach technological means and the effect that predetermined goal of the invention is taked for further setting forth the present invention, below in conjunction with accompanying drawing and preferred embodiment, to its specific embodiment of the intravenous catheter setting device with back-suction, structure, feature and the effect thereof that foundation the present invention proposes, describe in detail as after.
Before the present invention is described in detail, it should be noted that in the following description content similar elements is to represent with identical label.
Seeing also Fig. 2, shown in Figure 3, is respectively the view sub-anatomy of intravenous catheter setting device first preferred embodiment of the present invention with back-suction and the structure cutaway view after the combination.The present invention has first preferred embodiment of the intravenous catheter setting device of back-suction, comprising: a syringe 1, a pin group 2, a push rod 3, and a bullet is opened formula flexible member 4.
Above-mentioned syringe 1 has a surrounding wall 13 that centers on an axis and define a macropore 11 and aperture road 12.This surrounding wall 13 has a reverse arrival end 131 and a port of export 132, respectively in abutting connection with a big caliber section 133 and the tubule footpath section 134 of this arrival end 131 with this port of export 132, it is big to be formed on this, tubule footpath section 133, shoulder 135 between 134, be formed on a scrobicular ring 136 of an inner surface and contiguous this arrival end 131, be formed on a bulge loop 137 of this inner surface and contiguous this port of export 132, be formed on two block fins 138 of these big relative two sides of caliber section 133 1 outer surface levels and contiguous this arrival end 131, and be formed on these tubule footpath section 134 1 inner surfacies one against terrace edge 139.Axial two sides of aforesaid block fin 138 can for finger against.
Above-mentioned pin group 2, positioning piece 21, a needle stand 22, a needle body 23, a catheter block 24, a pliability conduit 25, and pin lid 26 with hollow.
This keeper 21 is the bulge loops 137 that fix in this syringe 1 macropore 11 movablely, and has a perforation 211 that runs through along this axis.
This needle stand 22, be spacing at this syringe 1 against 21 of terrace edge 139 and this keepers, and have towards this syringe 1 port of export 132 and with this against 139 of terrace edges be formed with a start-up space 220 an abutment face 221, with this keeper 21 perforation 211 holding sections 222 that engages, and be formed on the other end and external diameter less than a bore a hole holding parts 223 of 211 of this keeper 21.
This needle body 23 is fixed with this needle stand 22, and has a cutting tip 231 that passes this syringe 1 port of export 132.
This catheter block 24 is detachable liftoff being nested with in this syringe 1 tube wall 13 tubules footpath section 134 and in abutting connection with this port of export 132.
This conduit 25 is to be connected with this catheter block 24 and to pass for these needle body 23 cutting tips 231.
This pin lid 26 is to be nested with on the big caliber section 133 of contiguous this syringe 1 port of export 132, and has the surrounding wall 261 that ring covers this needle body 23.
Above-mentioned push rod 3, be to be set in this syringe 1 macropore 11 movablely, and tool around this axis and define a tube chamber 31 a tube wall 32, be communicated with ambient pressure and this tube chamber 31 and two QI KOU 33 that can open and close by operator's control, be set in this tube chamber 31 interior an activation members 34, a ventilative diaphragm sheet 35, a gas seal member 36 and an end cap 37.
This tube wall 32, have the forward open end 321 towards this pin group 2, a back sealing end 322 that is in reverse to this forward open end 321, a draw-in groove 323 that is formed on an inner surface and contiguous this forward open end 321, most fins 324 that are formed on an outer surface and contiguous this back sealing end 322, a clasp 325 that is formed on this outer surface and gos deep into can engaging with this scrobicular ring 136 behind this syringe 1 macropore 11 at this tube wall 32, and a terrace edge 326 of contiguous this forward open end 321.
This QI KOU 33 is formed in this tube wall 32 and contiguous this back sealing end 322, can arrange the air pressure of leading in this tube chamber 31.
This activation members 34, be these tube wall 32 forward open end 321 of detachable liftoff sealing, but and have and be hampered by this terrace edge 326 and snap rings 341 that fix mutually with this tube wall 32 draw-in grooves 323, run through and a runner 342 of containment blood, the fit portion 343 that is formed on a front end and can fixes with these needle stand 22 holding parts 223, and be in reverse to the port 344 that this fit portion 343 is formed on a rear end along this axis direction.
This diaphragm sheet 35 is arranged in the port 344 of this activation members 34, and these runner 342 1 ends of blockading ventilatively.
This gas seal member 36 is to be nested with at this tube wall 32 and in abutting connection with this forward open end 321, and with these syringe 1 surrounding wall 13 airtight contacts.
This end cap 37 is these tube wall 32 back sealing ends 322 of sealing.
Above-mentioned flexible member 4 is that extruding is contained in this syringe 1 aperture road 12, and has against an abutment end 41 of this syringe 1 port of export 132, reaches one of these needle stand 22 abutment faces 221 of pushing and withstanding and bounces up end 42.
See also Fig. 3, shown in Figure 4, Fig. 3 is the structure cutaway view after the combination of intravenous catheter setting device first preferred embodiment of the present invention with back-suction, and Fig. 4 is the cutaway view that two QI KOU are opening in first preferred embodiment.When carrying out that infusion catheter is provided with operation in the vein blood vessel, need only unload the pin lid 26 on this syringe 1 earlier, to appear this needle body 23, then, with the surrounding wall 13 that is hold by one hand this this syringe 1, puncture in the blood vessel of animal body by these needle body 23 cutting tips 231, just can guide blood and be back in the macropore 11 of this syringe 1 along this needle body 23, make this surrounding wall that can have an X-rayed 13 show the blood back phenomenons, and advise this needle body 23 of medical personnel and this conduit 25 correctly in the target approach blood vessel.When in these needle body 23 correct intravasations, can guide synchronously in these conduit 25 intravasations, at this moment, need only unload this catheter block 24 and this syringe 1, just can make this needle body 23 detach blood vessel, this catheter block 24 and this conduit 25, finish that this conduit 25 is imported endovascular operation, this catheter block 24 then can be connected with general drop transfer line and carries out fluid infusion.
Seeing also shown in Figure 5ly, is that the present invention has that a push rod is moved to a cutaway view that contacts with positioning piece in intravenous catheter setting device first preferred embodiment of back-suction.Because this syringe 1 macropore 11 is to be interconnected by the runner 342 of this activation members 34 and the tube chamber 31 of this push rod 3, making can be by the ventilative property of this diaphragm sheet 35 with aforementioned QI KOU 33 between this syringe 1 and this push rod 3, form an air flue that is communicated with ambient pressure, therefore, after finishing the aforementioned operation that this conduit 25 is imported in the target blood, need only keep the unimpeded of aforementioned QI KOU 33, and the lasting direction displacement that pushes this push rod 4 towards this syringe 1 port of export 132, borrow in this syringe 1 with this push rod 3 in air-flow discharge by aforementioned QI KOU 33, the blood backflow that just can guide in this syringe 1 macropore 11 is taken in to the runner 342 of this activation members 34, does not extrude outside this syringe 1 and can not be pushed.
See also Fig. 6, shown in Figure 7, Fig. 6 is that the present invention has in intravenous catheter setting device first preferred embodiment of back-suction this push rod and pushes the cutaway view that this keeper is moved to a shoulder that is hampered by a syringe, Fig. 7 is that a flexible member bounces up a needle stand and an activation members in first preferred embodiment, and interlock one needle body is hidden in the interior cutaway view of this push rod synchronously.At this moment, need only continue to push this push rod 3, just can be in the process of these syringe 1 port of export 132 displacements in this push rod 3, push this keeper 21 and this needle stand 22 towards these syringe 1 port of export 132 direction displacements, because this needle stand 22 can enter this start-up space 220 to being hampered by this against terrace edge 139, therefore, when being pushed, this needle stand 22 has an activity effect, resistance in the time of can lowering this needle stand 22 and detach this locating part 21 with this syringe 1 aperture road 12, make this keeper 21 this needle stand 22 be hampered by this can't the situation of displacement against terrace edge 139 under, discharge this needle stand 22 holding sections 222 with these push rod 3 propelling movements, and the direction displacement along this needle stand 22 towards this port of export 132, remove the positioning relation of this keeper 21 and this needle stand 22.
When this push rod 3 when these syringe 1 port of export 132 directions are moved to aforementioned fin 324 and are hampered by these syringe 11 arrival ends 131, this push rod 3 can be pushed this keeper 21 just and is moved to and be hampered by this syringe 1 shoulder 135, at this moment, the needle stand 22 that this can't move towards syringe 1 port of export 132 directions, can engage with the fit portion 343 of this activation members 34 with this holding parts 223, and because the opposition of this syringe 1 port of export 132 and this flexible member 4, the snap ring 341 that pushes this activation members 34 breaks away from the draw-in groove 323 of this tube wall 32, remove the fixing relation of this activation members 34 and this tube wall 32 synchronously, and start this flexible member 4.
Whereby, back stretch be opened and be discharged to this flexible member that is activated 4 can by bullet, and hold 42 to be resisted against bouncing up of these needle stand 22 abutment faces 221, promote this needle stand 22 and this activation members 34 and go deep into the position of these push rod 3 tube chambers 31 contiguous these tube walls 32 back sealing ends 322, driving this needle body 23 synchronously is hidden in the tube wall 32 of this push rod 3, make the syringe 1 that abandons to isolate this needle body 23 with this surrounding wall 13 and the tube wall 32 of this push rod 3, can exempt medical personnel finish this conduit 25 is set after, contact with this needle body 23 because tidying up this pin group 2, cause needle stick injury, the danger of infecting.
What deserves to be mentioned is, when this push rod 3 is goed deep into this syringe 1 macropore 11, after finishing the operation of isolating this needle body 23, this push rod 3 can fasten with the scrobicular ring 136 of the clasp on this tube wall 32 325 with this syringe 1 surrounding wall 13, makes this push rod 3 be hampered by this clasp 325 and the use of can't pulling back again.
Seeing also shown in Figure 8ly, is that the present invention has the cutaway view that two QI KOU in intravenous catheter setting device first preferred embodiment of back-suction are closed state.Infusion catheter is provided with in the process that operation carries out in vein blood vessel, if animal body blood pressure deficiency is arranged so that blood refluxes, or the target blood outward appearance is indeterminate, and when need surveying the property puncture, medical personnel can grip the tube wall 32 of this push rod 3, preferable gripping mode is with thumb, forefinger grips this tube wall 32 and seals aforementioned QI KOU 33, make the macropore 11 and these push rod 3 tube chambers 31 of this syringe 1, the runner 342 of this activation members 34, pointed under the situation of sealing by animal body and operator respectively with aforementioned QI KOU 33 at these needle body 23 cutting tips 231, form gastight closed state.At this moment, need only be with thumb, the forefinger application of force pull back this push rod 3 along this axis towards the direction displacement that is in reverse to this this syringe 1 port of export 132, make the purt that forms a low pressure in this syringe 1 macropore 11 inhale the space, whereby, when if these needle body 23 cutting tips 231 correctly puncture in the blood vessel, will take out and draw endovascular blood and pass back in this syringe 1 macropore 11, make the medical personnel can be quick, this needle body 23 of correct decision, conduit 25 is correctly in the intravasation, opposite, when if blood is not revealed in this syringe 1, the operator can utilize needle body 23 cutting tips 231 that entered animal body, the direct trimming movement of the property surveyed puncture, extremely aforementioned blood refluxes and is revealed in this syringe 1 macropore 11, just can finish catheter in blood vessel setting and the action of taking a sample test blood back, and do not need the repeated localised puncture animal body, can promote convenience and efficient that clinical treatment is used.
See also Fig. 9, shown in Figure 10, Fig. 9 is the cutaway view that the present invention has intravenous catheter setting device second preferred embodiment of back-suction, Figure 10 is that a flexible member draws an activation members and a needle stand in second preferred embodiment, and interlock one needle body is hidden in the interior cutaway view of this push rod synchronously.Second preferred embodiment of the present invention, roughly the same with first preferred embodiment, its difference is:
The tube wall 32 of this push rod 3, a terrace edge 326 that also has contiguous this forward open end 321.And the snap ring 341 ' of this activation members 34 is to be in reverse to the position that this fit portion 343 is formed on contiguous this port 344, and makes the draw-in groove 323 ' that engages with this snap ring 341 ' be formed on the inner surface of these push rod 3 tube walls 32 relative positions.
This flexible member 4 is that extruding is contained in the tube chamber 31 of this push rod 3, and this abutment end 41 to bounce up end 42 with this be to lean the terrace edge 326 of this tube wall 32 and the snap ring 341 ' of this activation members 34 respectively.
Whereby, the operator can control equally and open aforementioned QI KOU 33, in this push rod 3 in the process of these syringe 1 port of export 132 displacements, blood backflow in this syringe 1 macropore 11 is accommodated in the runner 324 of this activation members 34, and remove this keeper 21 and this needle stand 22 synchronously, the positioning relation of this activation members 34 and this tube wall 32, and this flexible member 4 of startup, these flexible member 4 bullets are opened and pushed these activation members 34 these needle stands 22 of drive and be moved in the tube chamber 31 of this push rod 3, and then this needle stand 22 and this needle body 23 be retained in the tube chamber 31 of this push rod 3, make the syringe 1 that abandons isolate these needle bodies 23 with this surrounding wall 13 and the tube wall 32 of this push rod 3.
As animal body blood pressure deficiency so that blood reflux, or the target blood outward appearance is indeterminate, and when need surveying the property puncture, can point the aforementioned QI KOU 33 of control sealing equally, make this syringe 1 and the gastight closed state of these push rod 3 interior formation, can take out by this push rod 3 and draw endovascular blood and pass back in this syringe 1 macropore 11, make medical personnel can be fast, correctly whether this needle body 23 of correct decision, conduit 25 in the intravasation, and can promote convenience and the efficient that clinical treatment is used.
See also Figure 11, Figure 12 and shown in Figure 13, Figure 11 is the cutaway view that the present invention has intravenous catheter setting device the 3rd preferred embodiment of back-suction, Figure 12 is that a flexible member draws an activation members and a needle stand in the 3rd preferred embodiment, and interlock one needle body is hidden in the interior cutaway view of this push rod synchronously.Figure 13 is the cutaway view that the present invention has intravenous catheter setting device the 4th preferred embodiment of back-suction.The 3rd preferred embodiment of the present invention, the 4th preferred embodiment, roughly the same with this first preferred embodiment, its difference is:
This flexible member 4 is that tension is contained in the tube chamber 31 of this push rod 3, and has a reverse positioning end 43 and a traction end 44.In Figure 11, Figure 12, this positioning end 43 is to be hooked on these push rod 3 tube walls 32 and to be close to this back sealing end 322, and this traction end 44 is the position bindings that are close to these snap rings 341 with this activation members 34.In Figure 13, this positioning end 43 is that the end cap 37 with this push rod 3 links.
Whereby, the operator can control equally and open aforementioned QI KOU 33, in this push rod 3 in the process of these syringe 1 port of export 132 displacements, blood backflow in this syringe 1 macropore 11 is accommodated in the runner 324 of this activation members 34, and remove this keeper 21 and this needle stand 22 synchronously, the positioning relation of this activation members 34 and this tube wall 32, and this flexible member 4 of startup, this flexible member 4 is shunk and draw these activation members 34 these needle stands 22 of drive and be moved in the tube chamber 31 of this push rod 3, and then this needle stand 22 and this needle body 23 be retained in the tube chamber 31 of this push rod 3, make the syringe 1 that abandons isolate these needle bodies 23 with this surrounding wall 13 and the tube wall 32 of this push rod 3.
As animal body blood pressure deficiency so that blood reflux, or the target blood outward appearance is indeterminate, and when need surveying the property puncture, can point the aforementioned QI KOU 33 of control sealing equally, make this syringe 1 and the gastight closed state of these push rod 3 interior formation, can take out by this push rod 3 and draw endovascular blood and pass back in this syringe 1 macropore 11, make medical personnel can be fast, correctly whether this needle body 23 of correct decision, conduit 25 in the intravasation, and can promote convenience and the efficient that clinical treatment is used.
See also Figure 14, shown in Figure 15, Figure 14 is the cutaway view that the present invention has intravenous catheter setting device the 5th preferred embodiment of back-suction, and Figure 15 is the cutaway view that the present invention has intravenous catheter setting device the 6th preferred embodiment of back-suction.The 5th preferred embodiment of the present invention, the 6th preferred embodiment, roughly the same with the 3rd preferred embodiment, second preferred embodiment respectively, its difference is:
The QI KOU 33 of this push rod 3 is formed on this end cap 37.In Figure 15, this push rod 3 also has detachable liftoff and these QI KOU 33 airtight cover plates 38 that engage.Whereby, the operator also can utilize this cover plate 38 these QI KOU 33 of control opening and closing of fault as shown in figure 15 except utilizing outside this QI KOU 33 of finger control opening and closing of fault as shown in figure 14.Whereby, can reach the action or the handled easily person that take a sample test blood equally and isolate the action of this needle body 23.
See also Figure 16, shown in Figure 17, Figure 16 is the cutaway view that the present invention has intravenous catheter setting device the 7th preferred embodiment of back-suction, and Figure 17 is the cutaway view that the present invention has intravenous catheter setting device the 8th preferred embodiment of back-suction.The 7th preferred embodiment of the present invention, the 8th preferred embodiment, roughly the same with second preferred embodiment, first preferred embodiment respectively, its difference is:
The QI KOU 33 of this push rod 3 is formed in this back sealing end 322, and this tube wall 32 also has a block bulge loop 327 that is formed on an inner surface and contiguous this back sealing end 322, this block bulge loop 327 can stop the port 344 of this activation members 34, and this activation members 34 is limited in this tube chamber 31.In Figure 17, this push rod 3 also has detachable liftoff and these QI KOU 33 airtight cover plates 38 that engage.Whereby, the operator also can utilize this cover plate 38 these QI KOU 33 of control opening and closing of fault as shown in figure 17 except utilizing outside this QI KOU 33 of finger control opening and closing of fault as shown in figure 16.Whereby, can reach the action or the handled easily person that take a sample test blood equally and isolate the action of this needle body 23.。
According to the above as can be known, the intravenous catheter setting device with back-suction of the present invention has following advantage and effect
1, the present invention can infusion catheter be provided with operation in finishing vein blood vessel after, can easily this needle body 23 be hidden in the tube chamber 31 of this push rod 3, make the syringe 1 that abandons to isolate this needle body 23 with this surrounding wall 13 and these push rod 3 tube walls 32, can exempt medical personnel after finishing this conduit 25 and being provided with, contact with this needle body 23 because tidying up this pin group 2, cause the danger of needle stick injury, infection, and can promote convenience and safety that clinical treatment uses the back to dispose.
2, the present invention can be by controlling opening and closing of aforementioned QI KOU 33, when execution vein blood vessel inner catheter was provided with, the backflow blood in this syringe 1 macropore 11 can be taken in to the runner 342 of this activation members 34, do not extrude outside this syringe 1 and can not be pushed, avoid causing environment and personnel's pollution.Simultaneously, can be indeterminate at blood pressure deficiency or target blood outward appearance, need the sick body of the property surveyed puncture, when infusion catheter is provided with in carrying out vein blood vessel, the operation of backflow blood is taken a sample test in execution, makes medical personnel this needle body of correct decision 23 and this conduit 25 whether in the correct intravasation fast, and can promote efficient, convenience and the safety that clinical treatment is used, for the emergency treatment patient, be the help key of striving for treating prime time.
The above, it only is preferred embodiment of the present invention, be not that the present invention is done any pro forma restriction, though the present invention discloses as above with preferred embodiment, yet be not in order to limit the present invention, any those skilled in the art, in not breaking away from the technical solution of the present invention scope, when the technology contents that can utilize above-mentioned announcement is made a little change or is modified to the equivalent embodiment of equivalent variations, in every case be the content that does not break away from technical solution of the present invention, according to technical spirit of the present invention to any simple modification that above embodiment did, equivalent variations and modification all still belong in the scope of technical solution of the present invention.
Claims (13)
1, a kind of intravenous catheter setting device with back-suction is characterized in that it comprises:
One syringe has a surrounding wall that centers on an axis and define a duct, and this surrounding wall has a reverse arrival end and a port of export;
One pin group, positioning piece, a needle stand, a needle body, a catheter block with hollow, an and flexible conduit, this keeper is to fix in this syringe duct, this needle stand is spacing between this syringe port of export and this keeper, and this needle body is fixed with this needle stand conducting, and has a cutting tip that passes this syringe port of export, this catheter block is to be nested with at this syringe surrounding wall and in abutting connection with this syringe port of export, and this conduit is to be connected with this catheter block and to pass for this needle body cutting tip; And
One push rod, be to be set in this syringe duct, and tool is around this axis and define a tube wall of a tube chamber, being communicated with ambient pressure controls with this tube chamber and by the operator and opens, at least one QI KOU of closing, be set in this intraluminal activation members, an and gas-pervious diaphragm sheet, this tube wall has the forward open end towards this pin group, and be in reverse to this forward open end one the back sealing end, this QI KOU is that row leads this intraluminal air pressure, this activation members is this tube wall forward open end of sealing, and has a runner that runs through and hold backflow blood along this axis direction, and form at one end and with a fit portion of this needle stand fit, this diaphragm sheet is to intercept between this runner and this QI KOU, this push rod is to push this keeper towards this syringe port of export displacement, and remove the fixing positioning relation of this keeper and this needle stand, and start this activation members synchronously, this this needle stand of activation members interlock is goed deep in the tube chamber of this push rod, and, this needle body is hidden in this tube wall towards this direction displacement of sealing end afterwards.
2, the intravenous catheter setting device with back-suction according to claim 1, the activation members that it is characterized in that wherein said push rod also has a port that is in reverse to this fit portion and is formed on the other end, this diaphragm sheet is arranged in the port of this activation members, and this runner one end of blockading ventilatively.
3, the intravenous catheter setting device with back-suction according to claim 1 is characterized in that wherein said push rod also has to be nested with at this tube wall and in abutting connection with a gas seal member of this forward open end, and this gas seal member is that the syringe surrounding wall is airtight contacts with this.
4, the intravenous catheter setting device with back-suction according to claim 1 is characterized in that the QI KOU of wherein said push rod is formed in this tube wall, and is is directly opened and closed with this QI KOU of finger Synchronization Control that grips this push rod by the operator.
5, the intravenous catheter setting device with back-suction according to claim 1, the tube wall that it is characterized in that wherein said push rod also has most fins that are formed on an outer surface and contiguous this back sealing end, aforementioned fin is to be limited to this syringe arrival end, and the stroke that this push rod is goed deep in this syringe duct is limited by aforementioned fin.
6, the intravenous catheter setting device with back-suction according to claim 1, it is characterized in that the QI KOU of wherein said push rod is formed in the back sealing end of this tube wall, and directly open and close with this QI KOU of finger Synchronization Control that grips this push rod by the operator.
7, the intravenous catheter setting device with back-suction according to claim 1 is characterized in that wherein said push rod also has an end cap of sealing end behind this tube wall of sealing.
8, the intravenous catheter setting device with back-suction according to claim 7 is characterized in that wherein said QI KOU is formed in this end cap, and is is directly opened and closed with this QI KOU of finger Synchronization Control that grips this push rod by the operator.
9,, it is characterized in that wherein said push rod also has and the airtight cover plate that engages of this QI KOU according to claim 6 or 8 described intravenous catheter setting devices with back-suction.
10, the intravenous catheter setting device with back-suction according to claim 1, it is characterized in that this intravenous catheter setting device also includes a bullet and opens the formula flexible member, this flexible member is that extruding is contained in this syringe, and has a abutment end against this syringe port of export, reach one of this needle stand of pushing and withstanding and bounce up end, this bounces up end is after this push rod is removed the fixing positioning relation of this keeper and this needle stand and started this activation members, this needle stand of pushing and withstanding and this activation members are goed deep in the tube chamber of this push rod, and towards this direction displacement of sealing end afterwards.
11, the intravenous catheter setting device with back-suction according to claim 1, it is characterized in that this intravenous catheter setting device also includes a bullet and opens the formula flexible member, this flexible member is that extruding is contained in this push rod, and has a abutment end against this tube wall forward open end, reach one of this activation members of pushing and withstanding and bounce up end, this bounces up end is after this push rod is removed the fixing positioning relation of this keeper and this needle stand and started this activation members, this activation members of pushing and withstanding drives in the tube chamber that this needle stand gos deep into this push rod, and towards the direction displacement of this back sealing end.
12, intravenous catheter setting device with back-suction according to claim 1, it is characterized in that this intravenous catheter setting device also includes a contraction type flexible member, this flexible member is that tension is contained in this push rod, and has a positioning end that is positioned at contiguous this back sealing end of this tube wall, an and traction end of this activation members of binding, this traction end is after this push rod is removed the fixing positioning relation of this keeper and this needle stand and started this activation members, draw this activation members and drive in the tube chamber that this needle stand gos deep into this push rod, and towards the direction displacement of this back sealing end.
13, intravenous catheter setting device with back-suction according to claim 1, it is characterized in that this intravenous catheter setting device also includes a contraction type flexible member, and this push rod also has an end cap of sealing end behind this tube wall of sealing, this flexible member is that tension is contained in this push rod, and has a positioning end that is positioned at this end cap, an and traction end of this activation members of binding, this traction end is after this push rod is removed the fixing positioning relation of this keeper and this needle stand and started this activation members, draw this activation members and drive in the tube chamber that this needle stand gos deep into this push rod, and towards the direction displacement of this back sealing end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100902627A CN100475283C (en) | 2006-07-11 | 2006-07-11 | Intravenous catheter setting device with back-suction force |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100902627A CN100475283C (en) | 2006-07-11 | 2006-07-11 | Intravenous catheter setting device with back-suction force |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101104088A CN101104088A (en) | 2008-01-16 |
| CN100475283C true CN100475283C (en) | 2009-04-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100902627A Expired - Fee Related CN100475283C (en) | 2006-07-11 | 2006-07-11 | Intravenous catheter setting device with back-suction force |
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| Country | Link |
|---|---|
| CN (1) | CN100475283C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105561434B (en) * | 2014-10-17 | 2019-03-08 | 许沛新 | Intravenous catheter setting device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2185605Y (en) * | 1994-04-08 | 1994-12-21 | 孟祖膺 | Disposable injector |
| CA2564893A1 (en) * | 2004-04-30 | 2005-11-10 | Sarstedt Ag & Co. | Blood-drawing device, in particular for infants and small children or small animals |
| CN1712077A (en) * | 2004-06-14 | 2005-12-28 | 许明正 | Syringe with back draft |
-
2006
- 2006-07-11 CN CNB2006100902627A patent/CN100475283C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2185605Y (en) * | 1994-04-08 | 1994-12-21 | 孟祖膺 | Disposable injector |
| CA2564893A1 (en) * | 2004-04-30 | 2005-11-10 | Sarstedt Ag & Co. | Blood-drawing device, in particular for infants and small children or small animals |
| CN1712077A (en) * | 2004-06-14 | 2005-12-28 | 许明正 | Syringe with back draft |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101104088A (en) | 2008-01-16 |
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