CN208942123U - A kind of Pressure wire - Google Patents

Abstract

The utility model provides a kind of Pressure wire, including insertion section and operation portion, and insertion section includes mandrel；Distal guide, distal guide are coated on the distal portions of mandrel；Proximal sheath, proximal sheath are coated on the proximal part of mandrel；Intermediate ring between distal guide and proximal sheath is set, and intermediate ring fixation is set on mandrel, and the outer surface of intermediate ring is equipped with groove；And pressure sensor, pressure sensor are arranged in the groove of intermediate ring, pressure sensor is connected with more sensing lines, and sensing line extends between proximal sheath and mandrel, and the other end for sensing line is connected with operation portion；The signal of sensor for being transmitted to external display equipment by operation portion.The Pressure wire of the utility model can accurately monitor the variation of pressure in cavity in real time；And line is sensed to be coated by proximal sheath, seal wire it is flexible, durability is good；Seal wire outer wall is smooth, and safety is excellent.

Description

A kind of Pressure wire

Technical field

The utility model relates to the field of medical instrument technology, specifically, being a kind of Pressure wire.

Background technique

Since the systems such as non-vascular system such as uropoiesis, digestion, breathing and reproduction are connected with human external, non-blood now The minimally invasive unit for endoscope operation of the treatment more options of guard system disease, for example, mostly use in urinary system cystoscope, ureteroscope, Endoscopes such as kidney mirror etc. carry out operative treatment, need to connect medical perfusion by the waterflood path on endoscope over the course for the treatment of Liquid is rinsed, and keeps the clear of surgical field of view, while taking away the additives that operation generates.However, the pressure of current perfusion liquid It is mainly controlled by performer's experience, if hypertonia in human body urinary system, is easy to cause perfusion liquid largely to enter blood Liquid.Perfusion liquid have a large amount of bacterial endotoxins, into blood after will affect human recycle system, so that body hypothermia, electricity is occurred It solves matter disorder, blood biochemistry and electric current dynamics to change, and then leads to the generation of bacteremia, endotoxemia, infectious shock, sternly The life security of patient is threatened again.Therefore, the real time monitoring and accurate control actual pressure in human body urinary system changed System is particularly important.

A variety of non-invasive pressure measuring techniques in non-vascular system have been disclosed in the prior art, for example, with reference to All disclose a kind of pressure measuring unit for urinary system in document CN205107661U and CN204428509U, but its All be by hose merging into the human body, by law of connected vessels, hose be located at the external other end connect pressure sensor into Row measurement, this in-vitro measurements method have the shortcomings that sensibility is poor, precision is low, disturbing factor is more, measurement result is unstable. The shake in micro-bubble, surgical procedure in pipeline, the smashed clast blocking of calculus etc. can lead to the distortion of measured value Even measurement failure.

Since there are above-mentioned various problems for external pressure measurement, a kind of importance of internal device for pressure measurement is provided It is increasingly prominent.A kind of monitoring of pressure in the kidney and control system, including optical fiber pressure are disclosed in bibliography CN104146699A Sensor, signal tuning device, signal current divider, display, feedback controller and medical charging pump, fibre optic compression sensor pass through Surgical cavity mirror handle hole is built into kidney and is connect by optical fiber with signal tuning device, for kidney intracavity operation operating space Domain carries out real-time pressure monitoring；Signal tuning device is connect with signal current divider signal input part, signal current divider signal output end It is connect respectively with display, feedback controller, feedback controller is connect with medical charging pump；Medical perfusion liquid is injected by conduit In medical charging pump, and it is intracavitary under medical charging pump control by conduit to be flowed into kidney.The technical solution energy precise measurement Real-time pressure and medical charging pump is fed back in kidney, ensures that the safety operated in various kidneys carries out.But the technical solution only mentions The design for having supplied a kind of pressure in the kidney monitoring, does not disclose pressure measuring unit in the kidney with specific structure.

For device for pressure measurement in specific human body, have been disclosed in the prior art a variety of for endovascular pressure Seal wire is measured, a pressure sensor is equipped with by the distal end in seal wire, is lived according to the pressure signal of pressure sensor The blood pressure of body vessel simultaneously calculates blood flow levels of the FFR value to assess blood vessel, and final functionality judges the journey of hemadostewnosis Degree.But due to this seal wire be applied to it is intravascular, in general, blood vessel is more narrow, and path is more bent complexity, It is typically all to empty mandrel for endovascular pressure measurement seal wire, pressure sensor is arranged in the inside of mandrel, senses The mandrel of device corresponding region is equipped with a big opening, and the cavity where making pressure sensor is in communication with the outside, and is avoiding pressure Sensor measures intravascular pressure on the basis of directly contacting with vascular wall, but the measurement accuracy of this pressure sensor is very big Influenced by aperture position and openings of sizes, difficulty of processing is big, in product design and fit on there is also very high difficulty, And the operation ease in manufacturing process is very poor.

It is led in addition, disclosing a kind of pressure in cardio-vascular interventional therapeutic in bibliography CN103720463A Silk, the Pressure wire main body are solid construction, which is provided with the pressure sensor of multiple spot distribution, pressure sensing Device is connected with inner lead, goes directly head along seal wire, is equipped with sensor lead electrode points on head, is connected with control handle, The blood stream pressure signal that acquisition pressure sensor measures in real time.Pressure sensor has the characteristics that Grazing condition, using what is curled up Mode is wrapped to seal wire surface；Seal wire head be designed to it is flat, it is convenient to be connected with the external torque sensor on control handle, Feedback moment when real-time measurement seal wire rotates.Pressure sensor and its sense leads in the technical solution are all to be fixed on entirely In soft film, a sensor layer flexible is obtained, it, will using the method for spiral winding in guidewire after adhesive stripe-coating Sensor layer flexible is uniformly attached to the setting position of core.Due to binder it is dried after, hardness is high, greatly affected The flexibility of seal wire, and a possibility that fexible film is separated with mandrel cracking is easy to appear in the bending process of seal wire.In addition, It is easy to appear gap between the fexible film of each circle spiral winding, seal wire surface irregularity is caused, to the cavity inner wall of insertion It damages, the health of harmful to human.

Therefore, on the basis of the above-mentioned prior art, a kind of measurement accuracy height is provided, what the processing is simple can be used for non-vascular The Pressure wire of system becomes this medical field urgent problem to be solved.

Utility model content

It is high that the technical problem to be solved by the present invention is to provide a kind of measurement accuracy, and what the processing is simple can be used for non-vascular The Pressure wire of system.

In order to solve the above technical problems, the utility model provides a kind of Pressure wire, including insertion section and operation portion,

Insertion section includes mandrel；

Distal guide, distal guide are coated on the distal portions of mandrel；

Proximal sheath, proximal sheath are coated on the proximal part of mandrel；

Intermediate ring between distal guide and proximal sheath is set, and intermediate ring fixation is set on mandrel, intermediate ring Outer surface is equipped with groove；

And pressure sensor, pressure sensor are arranged in the groove of intermediate ring, pressure sensor is connected with more biographies Feel line, sensing line extends between proximal sheath and mandrel, and the other end for sensing line is connected with operation portion；

Operation portion is connected with the proximal end of insertion section, for the signal of sensor to be transmitted to external display equipment.

Further, the signal of pressure sensor is transmitted to external display by wired or wireless mode by operation portion Equipment.

Further, part of the more sensing lines between proximal sheath and mandrel is mutually non-cross.

Further, part of the more sensing lines between proximal sheath and mandrel is uniformly distributed circumferentially in mandrel table Face.

Further, part helix of the more sensing lines between proximal sheath and mandrel is wrapped in mandrel surface.

Further, pressure sensor is fixed in the groove of intermediate ring by bond adhesion or physical structure.

Further, proximal sheath is heat-shrink tube, and the heat-shrink tube is by including fluoropolymer, polyurethane and nylon elastomer One of material be made.

Further, heat-shrink tube is made of fluorinated ethylene propylene copolymer.Further, the distal end of intermediate ring is protected with distal end The outer diameter of the proximal end of set is essentially identical；The outer diameter of the distal end of the proximal end and proximal sheath of intermediate ring is essentially identical.

Further, intermediate ring is made of metal material.

Further, it is also coated with functional coating on the distal end of proximal sheath and/or distal guide, functional coating is Hydrophilic coating, lubricant coating or bioactivity coatings.

In conclusion the utility model makes pressure sensor by the way that pressure sensor to be fixed in the groove of intermediate ring It is directly in contact with the liquid in body cavities, can accurately and in real time monitor the variation of pressure in body cavities；And it passes Sense line coated by proximal sheath, between proximal sheath and mandrel do not contain adhesive, seal wire it is flexible, bend in seal wire When will not cracking, long service life, durability is good；In addition, sensing line using proximal sheath integral coating, the processing is simple, seal wire Outer wall is smooth, prevents plowing from human organ, and safety is good.

Detailed description of the invention

Utility model will be further described in detail below with reference to the attached drawings and specific embodiments:

Fig. 1 is the structural schematic diagram of the guide wire portion of Pressure wire provided by the utility model；

Fig. 2 is diagrammatic cross-section of the Fig. 1 along the face A-A；

Fig. 3 is that sensing line provided by the utility model is spirally wound on the structural schematic diagram on mandrel；

Fig. 4 is the structural schematic diagram of intermediate ring provided by the utility model；

Fig. 5 Pressure wire provided by the utility model and a kind of display structural schematic diagram of connection type of equipment；

The structural schematic diagram of Fig. 6 Pressure wire provided by the utility model and display equipment another kind connection type.

Element numbers are as follows:

1- distal guide

Ring among 2-

21- groove

3- proximal sheath

4- mandrel

5- pressure sensor

51- senses line

6- operation portion

7- shows equipment

Specific embodiment

Presently in connection with attached drawing, the better embodiment of the utility model is discussed in detail.Although the description of the utility model will It is introduced together in conjunction with each embodiment, but this feature for not representing this utility model is only limitted to the several embodiments.Just Just on the contrary, being to have to cover the claim based on the utility model in conjunction with the purpose that embodiment makees utility model introduction The other selections or transformation that may extend.In order to provide to the understanding of the depth of the utility model, be described below in will be comprising being permitted More concrete details.The utility model can also be implemented without using these details.In addition, in order to avoid chaotic or fuzzy originally practical Novel emphasis, some details will be omitted in the de-scription.

In addition, "upper", "lower", "left", "right", "top", "bottom" used in the following description, are in order to preferably It describes the better embodiment of the utility model and sets, should not be construed as a limitation of the present invention.

Term used herein, " proximal end " or " tail end " are one end closest to doctor when in use.It is " distal end " or " preceding End " is farthest apart from inlet location one end in body cavity, i.e., one end farthest apart from doctor, i.e. insertion end.

In following attached drawing, the overall length of seal wire is not shown.The length of seal wire can change according to demand, but allusion quotation Type seal wire length in the range of 30 to 800 centimetres (cm).

The technical solution of the utility model is as shown in Figures 1 to 6, and seal wire includes insertion section and operation portion 6,

Insertion section includes mandrel 4；

Distal guide 1, distal guide 1 are coated on the distal portions of mandrel 4；

Proximal sheath 3, proximal sheath 3 are coated on the proximal part of mandrel 4；

Intermediate ring 2 between distal guide 1 and proximal sheath 3 is set, and the intermediate fixation of ring 2 is set on mandrel 4, intermediate The outer surface of ring 2 is equipped with groove 21；

And pressure sensor 5, pressure sensor 5 are arranged in the groove 21 of intermediate ring 2, pressure sensor 5 is connected with More sensing lines 51, sensing line 51 extend between proximal sheath 3 and mandrel 4, sense the other end and 6 phase of operation portion of line 51 Even；

Operation portion 6 is connected with the proximal end of insertion section, for the signal of sensor to be transmitted to external display equipment 7.

The utility model keeps pressure sensor 5 direct by the way that pressure sensor 5 to be fixed in the groove 21 of intermediate ring 2 It is in contact with the liquid in body cavities, can accurately and in real time monitor the variation of pressure in cavity；And sense line 51 by Proximal sheath 3 coats, and adhesive is not contained between proximal sheath 3 and mandrel 4, therefore seal wire is flexible, bends in seal wire When will not cracking, durability is good；In addition, sensing line 51 using 3 integral coating of proximal sheath, the processing is simple, and seal wire outer wall is smooth, Human organ is prevented plowing from, safety is good.

Further, the signal of pressure sensor 5 is transmitted to external show by wired or wireless mode by operation portion 6 Show equipment 7.When by wired connection mode as shown in Figure 5, operation portion 6 is equipped with connector, and connector can be common USB interface or PS/2 interface etc., external display equipment 7 can be mobile phone, tablet computer either computer etc., and be mounted with APP either software program, external connection display equipment 7 as display program can be connected with operation portion 6 by data line.

Further, external connection display equipment 7 and operation portion 6 can also be by radio connections as shown in FIG. 6, this When, 6 domestic demand of operation portion is equipped with a wireless communication module, for the signal of pressure sensor 5 to be sent to external connection display equipment 7； It also needs to be arranged a power module to be used for pressure sensor and wireless communication module power supply, accordingly, external connection display equipment 7 It is inside also required to be equipped with a wireless communication module, for receiving the signal of pressure sensor 5.

Further, there is no special restriction, pressure sensor 5 in the utility model for the type of pressure sensor 5 It may include semiconductor (such as silicon wafer) pressure sensor, piezoelectric pressure indicator, optical fiber or optical pressure sensor, Perot Type (Fabry-Perot type) pressure sensor, ultrasonic wave transference apparatus and/or ultrasonic wave pressure transducer, magnetic-type pressure sensing Device, solid state pressure sensor etc. or any other pressure sensor type appropriate.

Further, in order to fully ensure that the measurement accuracy of pressure sensor 5, more sensing 51 phases of line should be avoided as far as possible The case where there are cross-contacts between mutually, is otherwise likely to result in signal and interferes with each other, influence the measurement result of pressure sensor 5 Precision.Therefore, part of the line 51 between proximal sheath 3 and mandrel 4 is preferably sensed in the utility model not hand over mutually Fork.

It is highly preferred that part of the more sensing lines 51 between proximal sheath 3 and mandrel 4 can be as shown in Fig. 2, along week To 4 surface of mandrel is evenly distributed on, so that distance is farthest between each other for sensing line 51, mutual signal can be avoided dry as far as possible It disturbs；It preferably, can also be to be spirally wound on mandrel 4 by the way that line 51 will be sensed as shown in figure 3, be spirally wound on 4 surface of mandrel On, it can be better maintained the flexibility of seal wire, when seal wire bends, movement of the sensing line 51 without limitation on seal wire.

Further, pressure sensor 5 can be fixed on the recessed of intermediate ring 2 by any of mode in the prior art In slot 21, for example, being fixed in the groove 21 of intermediate ring 2 by bond adhesion or physical structure, which is fixed It can be the modes such as engaging common in the art either part cladding, as long as not influencing pressure sensor to the prison of pressure Survey.

Further, proximal sheath 3 is heat-shrink tube, and more sensing lines 51 are fixed on by pyrocondensation while 4 surface of mandrel Between proximal sheath 3 and mandrel 4, adhesive is free of between proximal sheath 3 and mandrel 4, the flexibility of Pressure wire is will not influence, leads Silk table face the phenomenon that cracking will not occur because of bending in use process, and long service life, the processing is simple；And it leads Silk table face is smooth, does not have the risk for scratching body cavity's inner wall.

It is highly preferred that heat-shrink tube can be by including one of fluoropolymer, polyurethane and nylon elastomer material system At.Previous materials all have good bioaffinity.In the present invention, it is preferable that heat-shrink tube is by fluorinated ethylene propylene Copolymer (FEP) is made.FEP pyrocondensation temperature is low, can be passed to pressure to avoid in process of production since pyrocondensation temperature is excessively high Sensor damages.And for FEP compared to other fluoropolymers, skin-friction force is smaller, and manufactured seal wire insertion property is more preferable.

Further, distal guide 1 can be spiral helicine metal elastic spring coil, be also possible to polymer jacket, the sheath It can be by including that one or more of fluoropolymer, polyurethane or nylon elastomer material is made.

Preferably, the outer diameter of the distal end and the proximal end of distal guide 1 of intermediate ring 2 is essentially identical；The proximal end of intermediate ring 2 and close It holds the outer diameter of the distal end of sheath 3 essentially identical, i.e., is seamlessly transitted between distal guide 1, intermediate ring 2 and proximal sheath 3, guarantee to lead Silk whole surface it is smooth and smooth, further reduce scuffing inner wall a possibility that.

Further, the intermediate ring 2 with pressure sensor 5 is not as shown in figure 4, special for the draw ratio of intermediate ring Restriction, can be adjusted according to the size of seal wire and pressure sensor 5.Intermediate ring 2 can be by with the rigid of certain degree of hardness Property material is made, and pressure sensor 5 can be made to maintain original shape when seal wire bends in this way, will not be curved with seal wire It is bent and deformation occurs, guarantee the measurement accuracy of pressure sensor 5；It is highly preferred that groove 21 is big in the upward length of guidewire shaft In the length of pressure sensor 5, in the groove 21 that pressure sensor 5 is fixed on intermediate ring 2, can be sensed in fixation pressure It avoids proximal sheath 3 directly to contact with pressure sensor 5 while device 5, avoids 3 pyrocondensation of proximal sheath at 4 surface of mandrel, by It is excessively high in temperature, and pressure sensor 5 is damaged.

Preferably, intermediate ring is the rigid material with certain degree of hardness, since intermediate ring is directly contacted with heat-shrink tube, preferably Ground, intermediate ring are made of metal material, for example, stainless steel, Nitinol etc., can bear higher pyrocondensation temperature without Deformation；It is highly preferred that intermediate ring can be and be made of stainless steel material, developability of the stainless steel material under X-ray is good, Ke Yibang Help operator that the position where pressure sensor is accurately positioned.

Further, mandrel 4 is the solid construction being made of metal material, and not special restriction can choose ability Common metal material in domain, for example, be able to use stainless steel (such as SUS304, SUS303, SUS316, SUS316L, SUS316J1, SUS316J1L, SUS405, SUS430, SUS434, SUS444, SUS429, SUS430F, SUS302 etc.), present The various metal materials, preferably superelastic alloy such as the alloy (including superelastic alloy) of pseudoelasticity.Since superelastic alloy compares It is soft and there is restoration, and be difficult to generate bending, so the seal wire by superelastic alloy as mandrel 4, front end portion has There are sufficient curved flexibility and elastic resilience, can be improved the insertion performance of to complexity, curved cavity, and energy Superior operability is accessed, and even if bending deformation repeatedly occurs for seal wire, due to the elastic recovery energy that seal wire is excellent Power, seal wire will not generate permanent Bending Deformation, so can be avoided seal wire causes to grasp because of bending in use The case where property made reduction.

Further, superelastic alloy preferably uses Nitinol, using Nitinol as mandrel 4 seal wire with excellent Different push-in, torque transfer, and then while there is good operability, there is good flexibility, recovery in distal end Property, and then tracing ability to cavity, safety are improved, it further reduced the risk for puncturing cavity inner wall.

Further, although the seal wire in the utility model attached drawing is all using straight peen seal wire, Pressure wire can also Think elbow seal wire.

Further, it is also coated with functional coating on the distal end of proximal sheath and/or distal guide, functional coating is Hydrophilic coating, lubricant coating or bioactivity coatings.Hydrophilic coating can attract hydrone to be formed on its surface " gel Shape " surface reduces resistance when seal wire insertion, while can further promote the biocompatibility of seal wire and injected organism tissue.It is right It is limited in hydrophilic coating material there is no specific, the optional material small by frictional resistance of coating is formed.Such as preferably by poly- second Enol, polyvinylpyrrolidone, polyethylene glycol, polyacrylamide, polyacrylic acid, Sodium Polyacrylate, poly- (methacrylic acid 2- hydroxyl Base ethyl ester), maleic anhydride based copolymer, ethylene-vinyl alcohol copolymer, 2- methylacryoyloxyethyl phosphocholine or its copolymerization Object, (2-hydroxyethyl methacrylate)-styrene block copolymer, various synthesis polypeptides, collagen, hyaluronate, One of cellulose-based copolymer is a variety of.

The type of lubricant coating is not limited specifically, as long as the frictional force on seal wire surface can be reduced, raising is led The insertion performance of silk, specifically can choose fluoropolymer coating.

The type of biological coating is not limited specifically, suitable apply can be selected according to the needs of conditions of patients Layer.For example, antithrombotic agent, such as heparin-quaternary ammonium complex；For example various silver compounds of antimicrobial, quaternary ammonium compound are such as Benzalkonium chloride, phenol derivatives such as thymol and antibiotic such as gentamicin, Norfloxacin and rifamycin etc..

Pressure wire in the utility model is preferably applied to non-vascular field, such as uropoiesis, digestion, breathing and reproduction Etc. in systems, since non-vascular system cavity is wider relative to blood vessel, in the presence of endoscope, can sufficiently avoid pressure sensing Device 5 is directly contacted with the intracorporal cavity inner wall of people, without being arranged pressure sensor 5 inside mandrel 4, it can reduce seal wire Size, can also be improved the measurement accuracy of pressure sensor 5.

In conclusion the utility model makes pressure sensor by the way that pressure sensor to be fixed in the groove of intermediate ring It is directly in contact with the liquid in body cavities, can accurately and in real time monitor the variation of pressure in cavity；And sense line Coated by proximal sheath, between proximal sheath and mandrel do not contain adhesive, seal wire it is flexible, not when seal wire bends It can crack, durability is good；In addition, sensing line using proximal sheath integral coating, the processing is simple, and seal wire outer wall is smooth, avoids drawing Hurt human organ, safety is good.

Above-mentioned explanation is the embodiment of specific embodiment in the utility model, for being illustrated more clearly that this is practical new The utility model of type is conceived, but it is not the restriction for the scope of the claims to the utility model.It is practical new according to this The utility model of type is conceived, and those skilled in the art can be easy variants and modifications the above embodiments, and it is practical that these belong to this Variants and modifications in novel utility model design are all contained within the scope of the utility model appended claims.

Claims (10)

1. a kind of Pressure wire, which is characterized in that including insertion section and operation portion,

The insertion section includes mandrel；

Distal guide, the distal guide are coated on the distal portions of the mandrel；

Proximal sheath, the proximal sheath are coated on the proximal part of the mandrel；

Intermediate ring between the distal guide and the proximal sheath is set, and the intermediate ring fixation is set in the mandrel On, the outer surface of the intermediate ring is equipped with groove；

And pressure sensor, the pressure sensor are arranged in the groove of the intermediate ring, the pressure sensor connection Have more sensing lines, the sensing line extends between the proximal sheath and the mandrel, it is described sensing line the other end with Operation portion is connected；

The operation portion is connected with the proximal end of the insertion section, sets for the signal of the sensor to be transmitted to external display It is standby.

2. Pressure wire as described in claim 1, which is characterized in that the operation portion is by wired or wireless mode by institute The signal for stating pressure sensor is transmitted to the external display equipment.

3. Pressure wire as described in claim 1, which is characterized in that the more sensing lines are located at the proximal sheath and institute The part stated between mandrel is mutually non-cross.

4. Pressure wire as claimed in claim 3, which is characterized in that the more sensing lines are located at the proximal sheath and institute The part between mandrel is stated to be uniformly distributed circumferentially in the mandrel surface.

5. Pressure wire as claimed in claim 3, which is characterized in that the more sensing lines are located at the proximal sheath and institute It states the part helix between mandrel and is wrapped in the mandrel surface.

6. Pressure wire as described in claim 1, which is characterized in that the proximal sheath be heat-shrink tube, the heat-shrink tube by It is made including one of fluoropolymer, polyurethane and nylon elastomer material.

7. Pressure wire as claimed in claim 6, which is characterized in that the heat-shrink tube is by fluorinated ethylene propylene copolymer system At.

8. Pressure wire as described in claim 1, which is characterized in that the distal end of the intermediate ring is close with the distal guide The outer diameter at end is essentially identical；The outer diameter of the proximal end and the distal end of the proximal sheath of the intermediate ring is essentially identical.

9. Pressure wire as described in claim 1, which is characterized in that the intermediate ring is made of metal material.

10. Pressure wire as described in claim 1, which is characterized in that the distal end of the proximal sheath and/or distal end shield It puts on and is also coated with functional coating, the functional coating is hydrophilic coating, lubricant coating or bioactivity coatings.