CN105343984A

CN105343984A - Guide wire

Info

Publication number: CN105343984A
Application number: CN201510663081.8A
Authority: CN
Inventors: 丁毅寿; 蔡杰; 刘万兵; 蒲忠杰
Original assignee: Lepu Medical Technology Beijing Co Ltd
Current assignee: Lepu Medical Technology Beijing Co Ltd
Priority date: 2015-10-14
Filing date: 2015-10-14
Publication date: 2016-02-24

Abstract

An embodiment of the invention discloses a guide wire, and belongs to the technical field of medical equipment. The problem that a contact force cannot be judged accurately when a guide wire in the prior art is in contact with a blood vessel is solved. The guide wire in the embodiment comprises a guide wire head end (11), an optical fiber sensor (31), a spring (22) and a fixing piece (12), wherein the optical fiber sensor (31) is arranged in an inner cavity of the guide wire; the spring (22) is fixed between the fixing piece (12) and the guide wire head end (11); the optical fiber sensor penetrates in an inner cavity of the fixing piece and the inside of the spring and then is fixedly connected to the guide wire head end (11); and an optical grating portion of the optical fiber sensor is positioned on the spring and the guide wire head end. Through the guide wire provided by the invention, the contact force of the guide wire and the blood vessel can be judged accurately.

Description

A kind of seal wire

Technical field

The present invention relates to technical field of medical instruments, particularly relate to the seal wire that a kind of head end contact force can be surveyed.

Background technology

Interventional guide wire has been widely used in medical interventions, the operations such as such as PCI (percutaneous coronary intervention (pci), Percutaneouscoronaryintervention), puncture.In intervene operation, when seal wire is in travel condition in patient body, doctor is observed by the travel condition of medical x-ray machine to seal wire, the image of medical x-ray machine display is X-Y scheme, doctor is judged seal wire and contacts blood situation by image, the accuracy judged depends on the service condition of contrast agent, and when not using contrast agent, doctor is the contact situation can not seeing seal wire and blood vessel, and the use contrast agent of heavy dose can cause comparatively major injury to patient.

For doctor, judge that the contact situation of seal wire and blood vessel is extremely important accurately, seal wire can be avoided to apply power to vascular tissue excessive or too small, if the excessive complication that may cause intervene operation of applying power, the too small effect not having again treatment of applying power, causes medical resource to be wasted.How to judge that the contact force of seal wire and blood vessel needs the problem of solution at present badly accurately.

Summary of the invention

Embodiments provide a kind of seal wire, this seal wire has the advantages that head end contact force can be surveyed, and realizes the accurate judgement of seal wire and contacts blood power, reduces the complication probability of intervene operation.

In view of this, the invention provides a kind of seal wire, can comprise:

Seal wire head end 11, the Fibre Optical Sensor 31 be arranged in guidewire lumen, spring 22, fixture 12;

Described spring 22 is fixed between fixture 12 and seal wire head end 11; Fibre Optical Sensor is fixed in seal wire head end 11 through fixture inner chamber and spring inner, and the grating part of Fibre Optical Sensor is positioned at spring and conductive filament head end.

Preferably, described Fibre Optical Sensor 31 is optical fiber bragg grating FBG.

Preferably, described seal wire head end 11 inside is provided with groove 33, and Fibre Optical Sensor coincide with groove and is connected.

Preferably, the seal wire outer tube 34 of described fixture 12 far-end is NiTi pipe.

Preferably, spring outside is provided with an elastoplast pipe 21 as protection.

Preferably, the external diameter of described fixture, NiTi pipe, plastic tube and seal wire head end is in the same size.

As can be seen from the above technical solutions, the embodiment of the present invention has the following advantages:

In the embodiment of the present invention, be provided with fixture and spring at the head end near-end of seal wire, spring is fixed between fixture and head end, and the grating of Fibre Optical Sensor is positioned at spring and conductive filament head end.When seal wire head end contacts with vascular tissue, because external force makes vascular tissue and seal wire head end mutually extrude, head end is stressed makes spring generation deformation, also there is deformation in grating, the coefficient between spring and grating deformation can be obtained by the experiment in early stage, and spring generation deformation and stressed between coefficient, just can be judged the stressed size of seal wire head end accurately by the deformation of grating that obtains and the coefficient known in advance.

Accompanying drawing explanation

In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.

Fig. 1 is the proximal structure sectional view of seal wire in the present invention;

Fig. 2 is the near-end overall structure schematic diagram of seal wire in the present invention.

Detailed description of the invention

Embodiments provide a kind of seal wire, the head end contact force of this seal wire can be surveyed, and achieves the accurate judgement of seal wire and vascular tissue's contact force, reduces the firmly excessive probability causing complication to occur, and the firmly too small medical resource waste caused.

Seal wire provided by the invention mainly comprises seal wire head end 11, the Fibre Optical Sensor 31 be arranged in guidewire lumen, spring 22, fixture 12; Described spring 22 is fixed between fixture 12 and seal wire head end 11; Fibre Optical Sensor is fixed in seal wire head end 11 through fixture inner chamber and spring inner, and the grating part of Fibre Optical Sensor is positioned at spring and conductive filament head end.

The present invention program is understood better in order to make those skilled in the art person, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the embodiment of a part of the present invention, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, should belong to the scope of protection of the invention.

Shown in figure 1-Fig. 2, seal wire comprises seal wire head end 11 (seal wire head end here refers to the circular arc shaped portion shown in Fig. 1), and is arranged on fixture 12, spring 22 and the FBG Fibre Optical Sensor 31 in guidewire lumen.

Spring 22 is fixed between seal wire head end 11 and fixture 12, and the two ends of spring 22 weld together with seal wire head end 11 and fixture 12 respectively.Preferably, nature extended configuration critical state can be in by keep-spring when seal wire (seal wire head end) does not come in contact with blood vessel.

FBG (FiberBraggGrating, Fiber Bragg Grating FBG) Fibre Optical Sensor 31 passes inner chamber 32, the FBG Fibre Optical Sensor of fixture at fixture place, and be fixed together with fixture, keep-spring in the raw.Fixture 12 is loop configuration, and inside has hollow cavity.FBG Fibre Optical Sensor passes after fixture in the middle of described spring 22, and the grating 35 of FBG is in spring 22 inside and seal wire head end 11 place.

Its operation principle is: when seal wire head end contacts with vascular tissue, because external force makes vascular tissue and seal wire head end mutually extrude, head end is stressed makes spring generation deformation, also there is deformation in grating, the coefficient between spring and grating deformation can be obtained by the experiment in early stage, and spring generation deformation and stressed between coefficient, just can be judged the stressed size of seal wire head end accurately by the deformation of grating that obtains and the coefficient known in advance.

Preferably, the outside of described spring 22 bonds one deck ultra-thin elastic plastic tube 21, and plastic tube 21 wraps up spring, and between seal wire head end 11 and fixture, one end is bonding with seal wire head end 11, and the other end is bonding with fixture 12.Plastic tube 21 can play the effect of protection spring, adopts elastomeric material to make, can not affect spring deformation.

Induction sensitivity to power during in order to improve grating pair seal wire and contacts blood further, preferably, a groove 33 is provided with in seal wire head end 11 inside, the grating end of Fibre Optical Sensor stretches in groove, the grating end of Fibre Optical Sensor and groove size are coincide, and FBG grating 35 and groove 33 are fixed together.

At the far-end of fixture, seal wire outer tube 34 is NiTi pipe, and described NiTi pipe and fixture 12 weld together, and ensures that the inner space of NiTi pipe and fixture is unaffected.FBG Fibre Optical Sensor is through fixture 12 and NiTi pipe 22 (cavity 36 of a NiTi pipe 22) afterbody through to NiTi pipe.

Described FBG grating 35 two ends to be fixed between seal wire head end and fixture and to be integrally formed with spring 22.During spring 22 stress deformation, FBG grating 35 is also along with distortion.Just can obtain a coefficient by deformation and stressed relation like this, then just can obtain the stressed size of seal wire head end by the dependent variable of coefficient and FBG grating.

It should be noted that, as shown in Figure 2, seal wire head end 11, plastic tube 21, fixture 12, the external diameter of NiTi pipe is consistent, and outer surface and pad thereof are smoothly, with the requirement of satisfied operation to medical apparatus and instruments.

The seal wire that head end contact force involved in the present invention can be surveyed, the head end near-end of seal wire is provided with fixture and spring, and spring is fixed between fixture and head end, and the grating of Fibre Optical Sensor is positioned at spring and seal wire head end place.When seal wire head end contacts with vascular tissue, external force makes vascular tissue and seal wire head end mutually extrude, and head end is stressed makes spring generation deformation, and grating also deformation occurs.Coefficient between spring and grating deformation can be obtained by the experiment in early stage, and spring generation deformation and stressed between coefficient, just can be judged the stressed size of seal wire head end accurately by the deformation of grating obtained and the coefficient known in advance.

By scheme provided by the invention, can the contact force of Real-Time Monitoring seal wire head end in the process of seal wire head end intravasation, judge by the size of contact force the strength that seal wire head end applies vascular tissue, thus reduce the generation of the complication such as perforation.

The above, above embodiment only in order to technical scheme of the present invention to be described, is not intended to limit; Although with reference to previous embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.

Claims

1. a seal wire, is characterized in that, described seal wire comprises:

Seal wire head end (11), the Fibre Optical Sensor (31) be arranged in guidewire lumen, spring (22), fixture (12);

Described spring (22) is fixed between fixture (12) and seal wire head end (11); Fibre Optical Sensor is fixed in seal wire head end (11) through fixture inner chamber and spring inner, and the grating part of Fibre Optical Sensor is positioned at spring and conductive filament head end.

2. seal wire according to claim 1, is characterized in that, described Fibre Optical Sensor (31) is optical fiber bragg grating FBG.

3. seal wire according to claim 1, is characterized in that, described seal wire head end (11) inside is provided with groove (33), and Fibre Optical Sensor coincide with groove and is connected.

4. seal wire according to claim 1, is characterized in that, the seal wire outer tube (34) of described fixture (12) far-end is NiTi pipe.

5. seal wire according to claim 1, is characterized in that, spring outside is provided with an elastoplast pipe (21) as protection.

6. seal wire according to claim 1, is characterized in that, the external diameter of described fixture, NiTi pipe, plastic tube and seal wire head end is in the same size.