Summary of the invention
The main object of the present invention is to provide a kind of invasive pressure sensor, it is intended to return to blood remaining in pipelineSubjects it is intravascular, reduce the discomfort of subjects.
To achieve the above object, a kind of invasive pressure sensor proposed by the present invention, comprising:
Sampling T-way, the sampling T-way include first interface, the second interface being connected to respectively with first interface and adoptBlood interface, the first interface are connected to for connecting with the blood vessel of subjects；
Pressure test device, one end of the pressure test device are connected to the second interface, the pressure test dressIt sets away from one end of the second interface for being connected to pressure test liquid；And
Return liquid device, described time liquid device is equipped with the accommodating chamber for storing pressure test liquid, the accommodating chamber respectively withThe pressure test device is connected to the second interface.
Optionally, described time liquid device includes:
Liquid-returning tube, the liquid-returning tube are equipped with the accommodating chamber, and one end of the liquid-returning tube, which is equipped with, is connected to the accommodating chamberHole for back flow；With
Piston, the piston include the piston head and piston rod being connected, and the piston head is movable to be set to the receivingIt is intracavitary, the scalable one end for deviating from the hole for back flow set on the liquid-returning tube of the piston rod；
The piston rod is mobile relative to the liquid-returning tube, drives the piston head in moving in the accommodating chamber so that describedPhegma flows to the second interface via the hole for back flow.
Optionally, the liquid-returning tube includes cylinder and lid, and the cover cap deviates from the hole for back flow together in the cylinderEnd, and be enclosed the accommodating chamber with the cylinder, the piston rod is fixed with the lid, and runs through the lidIt protrudes into the accommodating chamber and is connect with the piston head.
Optionally, the relatively described cylinder of the lid is rotatably arranged, and the end face of the lid is convexly equipped with mounting cylinder, describedThe side wall of mounting cylinder is equipped with the first screw thread；
The piston rod is set in the mounting cylinder, and the side wall of the piston rod is equipped with the second screw thread, first screw threadIt is engaged with second screw thread, the relatively described barrel body rotation of the lid, to drive the relatively described cylinder movement of the piston rod.
Optionally, the lid further includes filtering cover, the filtering cover be covered on the mounting cylinder away from the receivingThe end of chamber, the filtering cover filtering enter the air in the mounting cylinder.
Optionally, described time liquid device further includes gasket, and the gasket is sheathed on the piston rod side wall, and is located atIn the accommodating chamber, the gasket is abutted with the inner wall of the cylinder to seal the accommodating chamber.
Optionally, described time liquid device further includes fixing seat, and the fixing seat is connect with the cylinder, the fixing seat andThe pipe passage being connected to the hole for back flow is also formed between the cylinder, one end of the pipe passage connects with described secondMouth connection, the other end are connected to the pressure test device.
Optionally, the blood sampling interface end be equipped with attachment base, the attachment base be equipped with blood sampling mouth, the blood sampling mouth andThe blood-taking device connection.
Optionally, seal rubber plug is equipped in the attachment base, the seal rubber plug seals the blood sampling mouth, the sealantPlug is equipped with extruded hole, and after the blood-taking device and attachment base cooperation, the blood-taking device squeezes the seal rubber plug, makesThe extruded hole is connected to the blood sampling mouth and the first interface.
Optionally, the pressure sensor further includes infusion apparatus, and the infusion apparatus and the pressure test device deviate from instituteOne end of liquid device is stated go back to for being connected to, the infusion apparatus is used for input pressure test fluid.
Technical solution of the present invention returns liquid device by being provided with back liquid device between sampling T-way and pressure test deviceIt is provided with accommodating chamber, accommodating chamber is for storing pressure test liquid.When invasive pressure sensor carries out pressure test, pressure testDevice returns liquid device, second interface connection, and the first interface in sampling T-way is connected to second interface.In this way, subjectsBlood vessel is connected to pressure test liquid phase, and the blood vessel of subjects is transmitted pressure to pressure test liquid by pressure test device, to obtainObtain the physiological parameters such as vessel retraction pressure, diastolic pressure and the mean arterial pressure of measured.It should be noted that pressure test device,It returns and is attached by connecting tube between liquid device, sampling T-way and between sampling T-way and the blood vessel of subjects.WhenWhen carrying out sampling blood drawing by invasive pressure sensor, blood sampling interface is connected to first interface, can be realized and be obtained from blood sampling interfaceIt takes the blood of subjects to detect etc., also needs to pierce through the skin of patient in this way, avoiding sampling blood drawing, reduceMonitored pain.After the completion of sampling blood drawing, also remains blood between sampling T-way and the blood vessel of subjects, can causeThe discomfort of detected person, at this point, be provided with back liquid device by being set between sampling T-way and pressure test device, using returningPressure test liquid in liquid device will remain on blood between sampling T-way and the blood vessel of subjects and return to subjectsIt is intravascular, to reduce being not suitable for for subjects.In this way, also avoiding the multiple puncture blood drawing to detected person, blood-taking deviceIt is unutilized to remain a large amount of blood in connecting tube between puncturing structure, also avoids reducing detected person because frequentlyThe Anemia of blood drawing and initiation.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, completeSite preparation description, it is clear that described embodiment is only a part of the embodiments of the present invention, instead of all the embodiments.BaseEmbodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts it is all itsHis embodiment, shall fall within the protection scope of the present invention.
It is to be appreciated that the directional instruction of institute is only used for explaining each component under a certain particular pose in the embodiment of the present inventionBetween relative positional relationship, motion conditions etc., if the particular pose changes, directionality instruction is also correspondinglyIt changes correspondingly.
In the present invention unless specifically defined or limited otherwise, term " connection ", " fixation " etc. shall be understood in a broad sense,For example, " fixation " may be a fixed connection, it may be a detachable connection, or integral；It can be mechanical connection, be also possible toElectrical connection；It can be directly connected, the connection inside two elements or two can also be can be indirectly connected through an intermediaryThe interaction relationship of a element, unless otherwise restricted clearly.It for the ordinary skill in the art, can basisConcrete condition understands the concrete meaning of above-mentioned term in the present invention.
In addition, the description for being such as related to " first ", " second " in the present invention is used for description purposes only, and should not be understood asIts relative importance of indication or suggestion or the quantity for implicitly indicating indicated technical characteristic.Define as a result, " first ",The feature of " second " can explicitly or implicitly include at least one of the features.In addition, the "and/or" occurred in full text containsJustice is, including three schemes arranged side by side, by " A and/or B for ", including the side that A scheme or B scheme or A and B meet simultaneouslyCase.It in addition, the technical solution between each embodiment can be combined with each other, but must be with those of ordinary skill in the art's energyIt is enough realize based on, will be understood that the knot of this technical solution when conflicting or cannot achieve when occurs in the combination of technical solutionConjunction is not present, also not the present invention claims protection scope within.
The present invention proposes a kind of invasive pressure sensor 100.
Referring to Figures 1 and 2, in embodiments of the present invention, which includes sampling T-way 10, describedSampling T-way 10 includes first interface 11, the second interface 13 being connected to respectively with first interface 11 and blood sampling interface 15, describedFirst interface 11 is connected to for connecting with the blood vessel of subjects；Pressure-detecting device 50, the one of the pressure-detecting device 50End is connected to the second interface 13, and the pressure-detecting device 50 is away from one end of the second interface 13 for being connected to pressureTest fluid；And liquid device 30 is returned, described time liquid device 30 is equipped with the accommodating chamber 3111 for storing pressure test liquid, the appearanceChamber 3111 of receiving is connected to the pressure-detecting device 50 and the second interface 13 respectively.
Technical solution of the present invention returns liquid by being provided with back liquid device 30 between sampling T-way 10 and pressure test deviceDevice 30 is provided with accommodating chamber 3111, and accommodating chamber 3111 is for storing pressure test liquid.When invasive pressure sensor 100 is pressedWhen power is tested, pressure test device, return liquid device 30, second interface 13 is connected to, first season interface in sampling T-way 10 and theThe connection of two interfaces 13, in this way, the blood vessel of subjects is connected to pressure test liquid phase, pressure test device 50 is by subjectsBlood vessel transmits pressure to pressure test liquid, with the physiology such as the vessel retraction pressure, diastolic pressure and the mean arterial pressure that obtain measured ginsengNumber.It should be noted that pressure test device, returning between liquid device 30, sampling T-way 10 and sampling T-way 10 and monitoredIt is attached by connecting tube between the blood vessel of person.When carrying out sampling blood drawing by invasive pressure sensor 100, blood sampling is connectMouth 15 is connected to first interface 11, can realize that the blood for obtaining subjects from blood sampling interface 15 detects etc., in this way, keeping awayExempt from sampling blood drawing also to need to pierce through the skin of patient, reduces monitored pain.After the completion of sampling blood drawing, samplingAlso remain blood between threeway 10 and the blood vessel of subjects, the discomfort of detected person can be caused, at this point, being taken by being set toIt is provided with back liquid device 30 between sample threeway 10 and pressure test device, will be remained using the pressure test liquid returned in liquid device 30Blood returns to the intravascular of subjects between sampling T-way 10 and the blood vessel of subjects, to reduce subjects notIt is suitble to.In this way, the multiple puncture blood drawing to detected person is also avoided, in the connecting tube between blood-taking device and puncturing structure 71It is unutilized to remain a large amount of blood, also avoids reducing the Anemia that detected person causes because frequently drawing blood.
It should be noted that the blood vessel of detected person is pierced through by remaining needle 90, remaining needle 90 can be with indwelling in subjectsIt is up to several days time with it, the first interface 11 of sampling T-way 10 is connect with remaining needle 90 by connecting tube, taken to realizeThe connection of sample threeway 10 and detected person's blood vessel.Pressure test liquid in invasive pressure sensor 100 is usually to be vacuum-sealed inIn infusion bag either infusion bottle (not shown), pressure test liquid can be physiological saline, be also possible to medical fluid.In general, pressingOne end away from sampling T-way 10 of force test device also passes through connecting tube and is connected with infusion apparatus 70, and infusion apparatus 70 includes to punctureStructure 71 and water clock structure 73, puncturing structure 71 is for piercing through infusion bag or infusion bottle, to obtain in infusion bag or infusion bottlePressure test liquid, water clock structure 73 are used to control the flow velocity of pressure test liquid.Invasive pressure sensor 100 before the use, needsThe all parts of invasive pressure sensor 100 are detected, need the connection for for example needing to be connected between each componentPipe fills pressure test liquid, and excludes internal bubble, pressure test device 50 is connected to patient monitor (not shown), and will prisonInstrument parameters zero setting etc. is protected, and the accommodating chamber 3111 for returning liquid device 30 has also exactly filled pressure test in this processLiquid.
It should be noted that the pressure test device 50 in the present embodiment includes pressure test chip 51, pressure testChip 51 acquires the pressure changing of the pressure test liquid in pipeline, and switchs to for electric signal, signal export structure 55 and pressurePower is tested chip 51 and is connected, and in the pressure change electric signal transmission to monitor that pressure test chip 51 is exported, monitoringInstrument converts visual waveform image for the electric signal of pressure change and observes and count for medical staff.
Further, in some embodiments, pressure test device 50 further includes having zero threeway 57, and zero threeway 57 is arrangedIt in pressure test chip 51 and returns between liquid device 30, when invasive pressure sensor 100 is adjusted, is zeroed at threeway 57In highest order, the Heart center point for making zero threeway 57 using level meter and being monitored is horizontal, in this way, making obtained pressureThe data of power monitoring are more accurate.
Further, in some embodiments, pressure test device 50 further includes having flushing valve 53, and flushing valve 53 is set to pressureIt tests between chip 51 and infusion apparatus 70, flushing valve 53 is used to pipeline in entire pressure sensor being rapidly filled with pressure test liquidOr bubble in exclusion pipeline etc..
Referring to Fig. 3 to Fig. 5, in one embodiment of the invention, described time liquid device 30 includes liquid-returning tube 31 and piston 33, describedLiquid-returning tube 31 is equipped with the accommodating chamber 3111, and one end of the liquid-returning tube 31 is equipped with the hole for back flow for being connected to the accommodating chamber 31113113；The piston 33 includes the piston head 333 and piston rod 331 being connected, and the piston head 333 is movable to be set to the appearanceIt receives in chamber 3111, the piston rod 331 stretches out one end that the liquid-returning tube 31 deviates from the hole for back flow 3113；The piston rod331 is mobile relative to the liquid-returning tube 31, drives the piston head 333 in moving in the accommodating chamber 3111 so that the phegmaThe second interface 13 is flowed to via the hole for back flow 3113.
In the present embodiment, be arranged to by the way that liquid device 30 will be returned include liquid-returning tube 31 and piston 33 structure, invasiveIn test process before 100 use of pressure sensor, piston 33 is retreated, and pressure test liquid is sucked to and filled up accommodating chamber 3111,When needing using pressure test liquid in accommodating chamber 3111, push piston 33 can be by the pressure test liquid in accommodating chamber 3111It sends out.In the present embodiment, liquid device 30 will be returned to be arranged to include liquid-returning tube 31 and piston 33 by way of, structure is simple, andFacilitate the sucking and submitting of pressure test liquid, it is convenient to operate.
In some embodiments, the end of piston head 333 is also arranged with rubber plug 35, the inner sidewall of rubber plug 35 and cylinder 311Interference fit guarantees 3111 leakproofness of accommodating chamber with the fit-up gap of sealing piston 33 and accommodating chamber 3111.
Referring to Fig. 3 to Fig. 5, in one embodiment of the invention, the liquid-returning tube 31 includes cylinder 311 and lid 313, the lidBody 313 is covered on the cylinder 311 and deviates from the end of the hole for back flow 3113, and is enclosed the appearance with the cylinder 311Receive chamber 3111, the hole for back flow 3113 is set to the end of the cylinder 311, and the piston rod 331 and the lid 313 are fixed,And it protrudes into the accommodating chamber 3111 through the lid 313 and is connect with the piston head 333.
In the present embodiment, liquid-returning tube 31 includes cylinder 311 and lid 313, wherein one end of cylinder 311 is provided with backFluid apertures 3113, hole for back flow 3113 are connected to connecting tube, and the pressure test liquid inside accommodating chamber 3111 is via hole for back flow 3113 and evenPressure test liquid phase connection in adapter tube.The one end for the hole for back flow 3113 that liquid-returning tube 31 deviates from facilitates piston in the structure of opening33 installation, and one end of the hole for back flow 3113 deviated from by the sealing liquid-returning tube 31 of lid 313, make lid 313 and liquid-returning tube 31It is enclosed the accommodating chamber 3111 for temporarily storing pressure test liquid.The dismantling connection that lid 313 and cylinder 311 can be,It can be and be detachably connected by screw thread realization, be also possible to be detachably connected by buckling realization.
Referring to Fig. 4 and Fig. 5, in one embodiment of the invention, the relatively described rotatably setting of cylinder 311 of the lid 313, instituteThe end face for stating lid 313 is convexly equipped with mounting cylinder 3131, and the side wall of the mounting cylinder 3131 is equipped with the first screw thread 3311；
The piston rod 331 is set in the mounting cylinder 3131, and the side wall of the piston rod 331 is equipped with the second screw thread1311, first screw thread 3311 is engaged with second screw thread 1311, and the lid 313 is rotated relative to the cylinder 311, withThe relatively described cylinder 311 of the piston rod 331 is driven to move.
In the present embodiment, it should be noted that lid 313 and cylinder 311 are circle, lid 313 and cylinder 311 are logicalCrossing after snapping connection mutually to rotate, and the lateral wall of cylinder 311 is provided with sealing ring, and the facility of sealing ring can ensure that lid 313Leakproofness when being rotated relative to cylinder 311, the case where avoiding leakage.By being provided with mounting cylinder in the end face of lid 3133131, by being provided with the second screw thread 1311 on the side wall of mounting cylinder 3131, the corresponding side wall in piston rod 331 is arranged firstScrew thread 3311, when rotating cover 313, the first screw thread 3311 is engaged with the second screw thread 1311 to drive piston rod 331 with respect to cylinderBody 311 is mobile.Be connected through a screw thread between piston rod 331 and lid 313, on the one hand ensure piston rod 331 and lid 313 itBetween fastness, on the other hand, be threadedly coupled also ensure piston rod 331 the movement relative to cylinder 311 distance, with controlThe amount for squeezing out the pressure test liquid of accommodating chamber 3111, to achieve the purpose that accurately to control.It should be noted that mounting cylinder 3131Height it is higher, entire piston rod 331 can be all accommodated in the inside of mounting cylinder 3131, avoid and accidentally encounter piston rod331 the case where.
Referring to Fig. 4 and Fig. 5, in one embodiment of the invention, the lid 313 further includes filtering cover 3135, the filtering cover3135 are covered on the end away from the accommodating chamber 3111 of the mounting cylinder 3131, and the filtering cover 3135 filters described in entranceAir in mounting cylinder 3131.
In the present embodiment, filtering cover 3135 and mounting cylinder 3131 can be integral structure, may be a detachable connectionStructure.Filtering cover 3135 is equipped with filter structure, and filter structure can be filter membrane, filter screen etc., and filter structure is to entranceAir in mounting cylinder 3131 is filtered, and avoids not tying net substance as air enters in mounting cylinder 3131 in air,Piston 33 and accommodating chamber 3111 are polluted, it is ensured that the cleaning of pressure test liquid avoids the unholiness substance in air logicalIt crosses invasive pressure sensor 100 and enters the internal of detected person.
Referring to Fig. 4 and Fig. 5, in one embodiment of the invention, described time liquid device 30 further includes gasket 39, the gasket39 are sheathed on 331 side wall of piston rod, and are located in the accommodating chamber 3111, the gasket 39 and the cylinder 311Inner wall is abutted to seal the accommodating chamber 3111.
In the present embodiment, it by being internally provided with gasket 39 in the cylinder 311 for returning liquid device 30, further improvesLeakproofness in accommodating chamber 3111 avoids the pressure test liquid of 3111 storage inside of accommodating chamber from flowing out.
Referring to Fig. 3 to Fig. 5, in one embodiment of the invention, described time liquid device 30 further includes fixing seat 37, the fixing seat37 connect with the cylinder 311, are also formed between the fixing seat 37 and the cylinder 311 and are connected to the hole for back flow 3113Pipe passage 371, one end of the pipe passage 371 is connected to the second interface 13, the other end and the pressure testDevice connection.
In the present embodiment, by the way that fixing seat 37 is arranged, liquid device 30 will entirely be returned by, which facilitating, is fixed on specified position.GuThe both ends of the pipe passage 371 formed between reservation 37 and cylinder 311 are convenient to inhale from pipe passage 371 for connecting connecting tubeEnter or release pressure test liquid.It should be noted that cylinder 311 and fixing seat 37 are structure as a whole, by integrated through injection molding atType.
Referring to Fig. 2, in one embodiment of the invention, 15 end of blood sampling interface is equipped with attachment base 151, the attachment base151 be equipped with blood sampling mouth 1511, the attachment base 151 be used for the blood-taking device it is (not shown) cooperation, blood sampling mouth 1511 withThe blood-taking device connection.It is equipped with seal rubber plug 153 in the attachment base 151, the seal rubber plug 153 seals the blood sampling mouth1511, the seal rubber plug 153 is equipped with extruded hole, after the blood-taking device and the attachment base 151 cooperation, the blood sampling dressIt sets and squeezes the seal rubber plug 153, be connected to the extruded hole with the first interface 11 will pass through the extruded hole acquisitionThe blood of subjects.
In the present embodiment, blood sampling port is equipped with attachment base 151, the surface of attachment base 151 be equipped with set connection screw thread orIt is connection buckle (not shown), facilitates the cooperation of blood-taking device Yu attachment base 151.Setting blood sampling mouth 1511, blood sampling on attachment base 151Mouth 1511 is sealed by seal rubber plug 153.The end of seal rubber plug 153 is provided with extruded hole, when needing to take a blood sample, blood samplingDevice is by the cooperation with attachment base 151, and the end of blood-taking device squeezes seal rubber plug 153, thus by the end of seal rubber plug 153The extruded hole in portion struts, and is connected to extruded hole with first interface 11, to realize the blood for acquiring subjects by blood sampling mouth 1511Liquid.After blood sampling, blood-taking device is separated with attachment base 151, and the extruded hole of seal rubber plug 153 is cured automatically after external force eliminationIt closes to realize the sealing to blood sampling mouth 1511.
The above description is only a preferred embodiment of the present invention, is not intended to limit the scope of the invention, all at thisUnder the inventive concept of invention, using equivalent structure transformation made by description of the invention and accompanying drawing content, or directly/use indirectlyIt is included in other related technical areas in scope of patent protection of the invention.