CN208911235U - More seal wire medicine balloon dilating catheters - Google Patents

Abstract

The utility model discloses more seal wire medicine balloon dilating catheters, there is the sacculus of medication coat including tip tube, surface and there is twin-channel conduit, one first seal wire is entered a channel of conduit, first through hole and the line of the second through-hole in turn through tip tube, first through hole and behind the outer surface of sacculus by the second through-hole and the axis of sacculus is parallel；Further include the second seal wire of at least one, be arranged outside sacculus, and at least extend to the other end from one end of sacculus, length is greater than sacculus in the length of contraction state.More seal wires of this programme can be realized the abundant incision of lesion locations, reduce volume, facilitate access for lesion locations, reduce the damage to inner membrance simultaneously, improves conduit along the tracing property of seal wire, improve whole push effect, serious lesion locations can be treated, in conjunction with medication coat, blood saccule is effectively prevented to expand the restenosis after blood vessel, improves therapeutic effect.

Description

More seal wire medicine balloon dilating catheters

Technical field

The utility model relates to medical instruments field, especially more seal wire medicine balloon dilating catheters.

Background technique

Vascular diseases refer mainly to atherosclerosis, inflammatory vascular diseases, functional vascular disease, the true property of blood vessel Tumor disease etc..In addition to Zhen Xing blood vessel tumor and a small number of congenital vascular diseases, a variety of vascular diseases, whether device matter Property or functionality, basic pathological changes be lumen of vessels it is narrow (organic or spastic) or occlusion, make organ (heart, brain, kidney, Enteron aisle and limbs etc.) suffer from ischemic change (acute or chronic).It is tumor-like lesion that the expansion of limit office property, which is presented, in part vascular diseases. Aneurysm once being formed more to be gradually expanded, and untreated majority has ruptures lethal danger suddenly.

In recent years, with the rapid development of the science such as neuroimaging, microcatheter technology and material, computer, intravascular Jie Enter that technology is ripe day by day in terms for the treatment of angiosis, it is minimally invasive with its, safely, effectively the features such as affirmative by doctor and patient, One of critical treatment method of cerebrovascular disease is had become at present.

It is usually the vascular system for the conduit insertion patient that will have the sacculus closely folded and is sent to lesion locations, Make balloon inflation using certain pressure in the position.Sacculus can be expanded to certain diameter and length, so as to disease Displacement set cut, expanded, the operation such as the topical application of drug.

Even to this day, sacculus dilating catheter is widely used in the diagnosis of cardiovascular disease, treatment, it is intravascular intervention hand Most common Endovascular utensil in art can be not only used for expansion diseased region and transfer gantry, it is open-minded to also serve as support catheter Vascular lesion section is divided into four head end, sacculus utricule, linkage section, conveying lever parts from structure.

The some Cutting balloons occurred in the prior art, these Cutting balloons be in balloon surface device metal blade, Blood vessel plaque is cut while expansion, such as: what Chinese patent application CN201310135128.4 was introduced A kind of balloon surface is loaded with the Cutting balloon dilating catheter of drug, Cutting balloon dilating catheter include Cutting balloon catheter body and Medication coat, wherein Cutting balloon catheter body includes sacculus, and the surface of the sacculus is equipped with multiple blades, and in sacculus and The surface coated medicament coating of blade.

But balloon surface makes its overall dimensions become larger after device blade, is difficult under sacculus contraction state by circuitous The blood vessel of back twist song, while discontinuity is easy when cutting under balloon expandable state, cause cutting to cut not to the utmost or excessively It cuts, causes inner film injury larger.

Meanwhile the drug of anti-angiogenic endometrial hyperplasia is often coated on balloon surface by matrix coating by medication coat, When sacculus reaches lesion vessels wall and is softened expansion, when contacting with vascular wall inner membrance, pass through pressurization quick release and transfer medicine Object, so that drug is locally playing the role of anti-angiogenic endometrial hyperplasia, so that causing restenosis to endometrial hyperplasia plays prevention effect.

But medicine-coated balloon is when in use, needs to retain drug as far as possible before expansion and is not washed away by the blood flow, (typically not greater than 60 seconds) rapidly discharge drug to vascular wall tissue in short time after expansion.

Utility model content

The purpose of this utility model is exactly to be existed to solve the above-mentioned problems in the prior art by the cooperation of more seal wires The cutting of lesion locations and the positioning of sacculus are carried out when expansion, the prevention of hyperplasia are carried out in conjunction with medication coat, to provide one kind The good more seal wire medicine balloon dilating catheters of therapeutic effect.

The purpose of this utility model is achieved through the following technical solutions:

More seal wire medicine balloon dilating catheters are coated with the sacculus of medication coat including sequentially connected tip tube, surface And there is twin-channel conduit,

One first seal wire is in turn through tip tube, first through hole and behind the outer surface of the sacculus by the second through-hole Into a channel of conduit, the line of the first through hole and the second through-hole is parallel with the axis of the sacculus；

It further include the second seal wire of at least one, setting is prolonged outside the sacculus, and at least from one end of the sacculus The other end is reached, length is greater than the sacculus in the length of contraction state.

Preferably, in more seal wire medicine balloon dilating catheters, the medication coat is anti-endometrial hyperplasia similar drug Coating.

Preferably, in more seal wire medicine balloon dilating catheters, the sacculus is whole crossover or fast exchange Type.

Preferably, in more seal wire medicine balloon dilating catheters, the sacculus has 3-6 bending in a folded configuration And the respectively wing of sacculus periphery.

Preferably, in more seal wire medicine balloon dilating catheters, the first passage of the conduit is circle, and second is logical Road is semilune.

Preferably, in more seal wire medicine balloon dilating catheters, axis direction of second seal wire along the sacculus Extend and with the first seal wire divide equally the sacculus periphery or second seal wire along the sacculus axis direction spiral winding In sacculus periphery

Preferably, in more seal wire medicine balloon dilating catheters, the length of second seal wire is more than that the sacculus exists The length 1-100mm of contraction state.

Preferably, in more seal wire medicine balloon dilating catheters, the quantity of second seal wire is not less than 2.

Preferably, it in more seal wire medicine balloon dilating catheters, is additionally provided on second seal wire a pair of for marking Show the thin-walled developing ring of balloon position.

Preferably, in more seal wire medicine balloon dilating catheters, the free end of the conduit connects Y connector, institute It states Y connector and tubes fit and forms sacculus air flue and can be by the perforative multifunctional channel of the first seal wire, and the Y shape connects Two interfaces of part are female Luer.

The advantages of technical solutions of the utility model, is mainly reflected in:

This programme deft design, structure is simple, on the one hand utilizes the structure of more seal wires of balloon surface, makes them in sacculus It contacts when expansion with lesion locations effectively to be cut, seal wire reduces the volume of dilating sacculus relative to blade, just In entering lesion locations, while seal wire opposing blades can reduce the damage to inner membrance；Pass through first through hole and second simultaneously Through-hole limits the first seal wire, guarantees medicinal balloon during push, the first seal wire is located at the part of balloon surface not Kink displacement can occur, improve conduit along the tracing property of seal wire, improve whole push effect, it can be to serious lesion locations It is treated, on the other hand, in conjunction with the medication coat of anti-endometrial hyperplasia class, endometrial hyperplasia after can be reduced blood vessel internal membrane damage, It effectively prevents blood saccule to expand the restenosis after blood vessel, improves therapeutic effect, for common assist sample hardening and high calcification Blood vessel class stenotic lesion tool has a better effect.

Meanwhile the quantity in conjunction with the second seal wire, position and the design for laying form, on the one hand, can adequately cover disease Become the circumference all directions in region, increase cut coverage, to guarantee the uniformity and adequacy of lesion locations cutting, another party is more Root seal wire can play certain package protective effect to sacculus, avoid sacculus from deforming, increase and mention in sacculus transmission process Effect is sent, to discharge lay the foundation completely for subsequent balloon expandable and drug, while after balloon expandable, can be led by more The positional relationship of silk plays certain supporting role to sacculus, realizes the limit of sacculus, shifts sacculus not consequently facilitating drug The release of coating.

Balloon type can be whole crossover, can increase the pushability and tracing property of transportation system, to be suitable for hat Shape artery and peripheral blood vessel.

The circle of conduit and the setting of semilune channel can reduce while increasing inflation bleed passage usable area The diameter of conduit, to reduce overall dimensions.

The channel passed through for seal wire that twin-channel conduit and Y type connector are formed, can be also used for heparin, contrast agent Injection, structure simplify while, enrich the function of conduit.

Detailed description of the invention

Fig. 1 is the overall structure diagram of the utility model；

Fig. 2 is in Fig. 1, when the second seal wire linearly extends, the enlarged drawing of balloon portion；

Fig. 3 is in Fig. 1, when the second seal wire spiral winding, the enlarged drawing of balloon portion；

When Fig. 4, Fig. 5 are that the second seal wire linearly extends, the folded section signal of medicine balloon dilating catheter Figure, black color dots are the section of seal wire；

When Fig. 6 is the second seal wire spiral winding, the folded schematic cross-section of medicine balloon dilating catheter, black color dots The section of one seal wire, two semi-circular arc bodies are the section of two second seal wires；

Fig. 7 is the schematic cross-section of catheter body.

Specific embodiment

The purpose of this utility model, advantage and feature will carry out figure by the non-limitative illustration of preferred embodiment below Show and explains.These embodiments are only the prominent examples using technical solutions of the utility model, all to take equivalent replacement or wait Effect transformation and formed technical solution, all fall within the requires of the utility model protection within the scope of.

In the description of scheme, it should be noted that term " center ", "upper", "lower", "left", "right", "front", "rear", The orientation or positional relationship of the instructions such as "vertical", "horizontal", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, It is merely for convenience of description and simplification description, rather than the device or element of indication or suggestion meaning there must be specific side Position is constructed and operated in a specific orientation, therefore should not be understood as limiting the present invention.In addition, term " first ", " second ", " third " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.Also, in retouching for scheme It is proximal end by the direction of proximal operator using operator as reference, the direction far from operator is distal end in stating.

The more seal wire medicine balloon dilating catheters disclosed with reference to the accompanying drawing to the utility model are illustrated, such as attached drawing 1 It is shown comprising sequentially connected tip tube 1, surface are coated with the sacculus 3 of medication coat and have twin-channel conduit 5, such as Shown in attached drawing 2, attached drawing 3, one first seal wire 10 is in turn through tip tube 1, first through hole 2 and across the appearance of the sacculus 3 Enter a channel of conduit 5 behind face by the second through-hole 4, i.e., described first seal wire 10 is between first through hole 2 and the second through-hole 4 Part be located at the outside of the sacculus 3, and the axis of the line of the first through hole 2 and the second through-hole 4 and the sacculus is flat On the one hand row, this design guarantee first seal wire 10 of sacculus during push, between first through hole 2 and the second through-hole 4 Kink, displacement will not occur, whole push effect is improved, on the other hand, so that extending into lesion locations simultaneously in dilating catheter And when the expansion of sacculus 3, the part that first seal wire 10 is located at outside the sacculus 3 can be contacted with lesion locations and to lesion locations It is cut.

Also, the position of the first through hole 2 and the second through-hole 4, which can according to need, to be configured, as they can set Setting includes main body and balloon tube positioned at main body both ends in the sacculus 3() main body two end regions or described first logical Hole 2 also can be set the junction in the sacculus 3 and tip tube 1 or be arranged on the tip tube 1, second through-hole 4 Also it can be set on join domain or the conduit 5 in the sacculus 3 and conduit 5.

Further, the sacculus 3 is whole crossover or rapid-exchange version, preferably uses nylon (PA) or polyethers embedding Single lumen catheter is made as sacculus raw material in section amide (PEBAX) extrusion, then the hot blow on the balloon forming machine containing protrusion mold It is moulded into type.

And the medication coat of 3 surface of the sacculus coating is the coating of anti-endometrial hyperplasia similar drug, such as taxol or thunder pa The coating of the drugs such as mycin, and the medication coat is liquefied comprising drug, hydrophobicity or hydrophilic excipient and Solvent, preferably excipient are hydrophobic, also, include nanoscale and/or micron-sized excipient in the medication coat The size of grain and drug granule, the nanoscale excipient granule and drug granule is between 1~100 nanometer；The micron The excipient granule of grade and the size of drug granule are between 1~100 micron.

Medication coat uses hydrophobic excipient, can be washed loss during blood vessel conveys to avoid drug Fall, the biocompatibility of excipient is equally convenient for sacculus medication coat after contacting with lesion locations, quickly adequately carries out medicine Object release.

Further liquefied characteristic changes the usual mode of thinking that the existing medication coat in this field is solid-state coating, So that sacculus medication coat has certain viscosity, so that the medicine capsule coating that concedes points has more preferably adhesive force and medicine with sacculus There is more preferably binding force between coating granule, be equally beneficial for reducing the loss of drug during transportation, be conducive to simultaneously When sacculus medication coat and lesion locations contact, it is adhered to blood vessel wall surface.

Liquefied sacculus medication coat folds sacculus, and be conducive to its table convenient for folding to sacculus The sacculus medication coat in face covered to realize protection, is conducive to be further reduced sacculus medication coat during transportation Loss.

Simultaneously as medication coat particle (excipient granule and drug granule) is micron order and/or nanoscale, their shapes At medication coat have great surface area, be on the one hand capable of increasing the contact surface area of drug and sacculus, thus improve with On the other hand the binding force of sacculus is capable of increasing inflated and expands the contact area with vascular wall afterwards, so that drug Particle be resistant to more sufficiently, contacting and adhering to it with blood vessel surface more evenly so that drug can be with quick release to blood vessel On wall, to improve the release efficiency and utilization rate of drug.

In addition, micron order and/or nanoscale medication coat particle be also beneficial to be evenly distributed in drug granule it is whole In a medication coat, so as to which when medication coat and vascular wall contact, drug granule is evenly dispersed to lesion locations, i.e., Be conducive to the uniform release of drug, and be conducive to increase the release area of drug, the utilization rate of drug can be improved and improves treatment Effect.

Further, nanoscale and/or micron-sized medication coat particle, which also help, realizes the uniform of medication coat particle Gap between distribution and reduction medication coat particle, avoids the occurrence of the construction of hollow, is conducive to keep coating own face coarse Degree reduces, to make medicinal balloon have lower surface roughness, the drop of surface roughness when coating coats balloon surface Low one side can reduce shearing force of the sacculus during transportation between blood, be convenient for conveying and reducing medication coat Be lost amount is washed away by blood during transportation；On the other hand, smooth surface and uniform medication coat particle also have More come into full contact with conducive to medication coat and lesion locations, avoid generating the medication coat particle of gap or only protrusion with Vascular wall contact, to further be convenient for the release of drug.

Also, the medication coat formed relative to micron-sized medication coat particle, nanoscale medication coat particle Medication coat has more preferably effect, in addition, when not having micron particles and nano-scale particle mutually to mix in medication coat particle When miscellaneous, particle size gap is small, and the particle uniformity of the coating of acquisition is more preferable so that the surface roughness of coating into One step reduces the contact area of go forward side by side increase and vascular wall.

Preferably, by taking taxol drug as an example, the drug, excipient and solvent be respectively taxol, triglycerides and They are mixed with the ratio of mass ratio 1:4:5, are heated to 30 degree by acetone, and constant temperature stirs 30 minutes, is sprayed on after forming medical fluid The surface of sacculus forms medicinal balloon.

Also, as shown in attached drawing 4, attached drawing 5, the medicinal balloon being ultimately formed has the 3-6 curved wings, thus favorably It is convenient for conveying and be conducive to carry out one by medication coat of the wing to sacculus outer surface in the outer diameter for reducing the sacculus Fixed covering and protection reduces the loss of medication coat during transportation, increases the medication amount for reaching lesion locations.

In addition, the sacculus 3 connects the conduit 5 by modes such as laser weldings, the material of the conduit 5 is that polyethers is embedding Section acyl presses (PEBAX), and as shown in Fig. 7, first passage 13 is circle, passes through for the first seal wire 10, with described second The conducting of through-hole 4 and internal diameter are not less than 0.30mm, its further preferred internal diameter is at least for 0.014 inch, 0.018 inch, 0.035 Why preferably the seal wire of three kinds of specifications of inch passes through, the seal wire of these three specifications, if being the diameter due to the first seal wire 10 It is excessive, it will cause overall dimensions increasing, to be not easy to be pushed, be also unfavorable for medication coat and come into full contact with lesion locations To carry out drug release.

Since the needs of first passage 13 are designed as circle in order to the smooth movement between the first seal wire and conduit, if with It is also configured as the identical circle of area of section or other polygons with discouraged second channel 12 in inflated, then, it will Cause the area of section of conduit to increase, cause conduit thicker, therefore, shown in attached drawing 7, it is not small that second channel 12 is designed as diameter In the semilune of 0.30mm, match so as to the arc-shaped profile effectively with first passage, avoids occupying sky to each other Between interference, realize the complementation in space, be conducive to reduce conduit 5 area of section.

Also, as shown in Fig. 1, the free end of the conduit 5 connects Y connector 6, the Y connector 6 and conduit 5 cooperatively form for inflated and discouraged sacculus air flue and can be by the perforative multifunctional channel of the first seal wire 10, that is, institute A combination of channels for stating second channel and Y connector 6 that sacculus air flue is conduit 5 forms, and the multifunctional channel is to lead The first passage of pipe 5 and another channel of Y connector 6 are spliced, and the multifunctional channel is in addition to being used for the first seal wire Pass through, it can also be used to injecting heparin, contrast agent etc., and two interfaces 7,8 of the Y connector 6 are female Luer, preferably For 6% standard luer fittings.

If only the first seal wire 10, it is only capable of for lesion patch being cut into a single seam in balloon expandable, can not covers The lesion locations of lid blood vessel circumferential wall, the spreadability for causing lesion locations to be cut, adequacy and uniformity are bad, cutting effect Difference, it is little for the cutting effect of height calcification diseased region, it is unfavorable for the abundant release of medication coat.

Therefore, as shown in attached drawing 2, attached drawing 3, more seal wire medicine balloon dilating catheters further include at least one second Seal wire 11 is arranged in outside the outer wall of the sacculus 3, at least extends to the other end from one end of the sacculus, pushing Cooperate in the process with first seal wire 10 and lesion locations are cut into piecemeal, consequently facilitating dredging and the progress drug of blood vessel The release of coating.

Specifically, one end of second seal wire 11 through the tip tube 1 and is fixed on the remote of the tip tube 1 End, the other end are fixed on the balloon tube of 3 proximal end of sacculus or the join domain or conduit 5 of sacculus and conduit 5, also, The length of second seal wire 11 is more than length 1-100mm of the sacculus 3 in contraction state, therefore when sacculus 3 is unexpanded, Second seal wire 11 has certain deformation freedom degree, and in balloon expandable, can with balloon dimension variation into Row adaptive change is simultaneously tensioned.

The specific length of second seal wire 11 is adjusted according to the size of the sacculus 3, this is because if second The too long flexion torsion that can easily cause the second seal wire of the length that seal wire 11 exceeds, is unfavorable for pushing, if the length exceeded is spent It is short, then it will limit balloon inflation, cause sacculus to be unable to fully expand, and in balloon expandable, also will affect the second seal wire two Hold fixed fixing.

Meanwhile the laying form of second seal wire 11 for lesion locations cutting adequacy, uniformity, spreadability with And in sacculus transmission process resistance to deformation, expansion when supportive have strong influence, personnel largely grind after study Study carefully and find that following structure has optimal effect:

As shown in attached drawing 2, attached drawing 4, attached drawing 5, second seal wire 11 is from one end of the sacculus along the axis of the sacculus Line direction extends to the other end, and the periphery of the sacculus is divided equally with the first seal wire 10, i.e., when second seal wire 11 is 1 When, the angle between first seal wire 10 is 180 °, i.e., the face of excessively described first seal wire and the second seal wire 11 will be described Sacculus cutting is equal two halves；When second seal wire 11 is 2, any two in the first seal wire 10 and the second seal wire 11 Angle be 120 °, and so on.

In another laying form, as shown in Fig. 3, second seal wire 11 is twined along the axis direction spiral of the sacculus It is wound on sacculus periphery, for example, single wire is spirally wound on sacculus periphery when second seal wire 11 is 1, when described the When two seal wires 11 are 2, two second seal wires are parallel spiral to be wrapped in sacculus periphery, and so on；Also, each second seal wire 11 can only wind the partial circumference region of sacculus periphery, also can wind the whole region in sacculus periphery, relative to only twining Around the partial circumference region of sacculus periphery, the extension of sacculus can be generated when the second seal wire is wrapped in the whole region of sacculus periphery It hinders, is unfavorable for the abundant expansion of sacculus, as shown in Fig. 6, two the second seal wires 11 wind the half of the sacculus periphery respectively On width circumferential area, also, when the second seal wire 11 has the case where intersecting with the first seal wire 10, make first seal wire 10 In the top of second seal wire 11.

Meanwhile for screw type lays relatively straight line style laying, the second seal wire 11 can cover bigger lesion locations, from And the spreadability and adequacy of cutting are improved, there is bigger protected area simultaneously for sacculus, further avoid sacculus conveying Deformation in the process provides bigger bearing area on the other hand also in balloon expandable, guarantees the effective of sacculus limit Property；

It is preferred that the quantity of second seal wire 11 is not less than 2, and it is additionally provided on second seal wire 11 a pair of for marking Show the thin-walled developing ring 9 of balloon position, the thin-walled developing ring 9 is preferably that platinumiridio is made, under X-ray as it can be seen that in hand The position of sacculus can be identified in art, sacculus is smoothly delivered to lesion vessels region convenient for operator, they can be set The both ends of piece second seal wire 11 also can be set on two seal wires.

When being treated using more seal wire medicine balloon dilating catheters, process is as follows:

The case where preoperative radiography assessment lesion vessels, select the foley's tube and catheter sheath of suitable dimension.

S1 selects suitable position puncture vessel, and the first seal wire 10 is placed in vascular lesion position by catheter sheath.

The free end of first seal wire 10 is sequentially passed through tip tube 1, first through hole 2, the second through-hole 4, conduit 5 and Y shape by S2 Connector 6, and it is located at part of first seal wire 10 between first through hole and the second through-hole outside the sacculus.

Sacculus 3 is pushed forward into vascular lesion position along the first seal wire 10 by S3.

S4, starting pump reaches nominal pressure to inflated to it, after inflated expansion, pushes the first seal wire 10 and the Two seal wires 11 are mobile to the lesion locations and contact and cut with pathological tissues, and expansion continues 30-60 seconds to carry out medicine The release of object coating.

S5, after reaching the expansion time, starting pump is vacuumized sacculus after shrinking it completely, withdraws from foley's tube and first Seal wire 10.

Also, in practical application, if it is desired, further include S6 between S3 and S4 step, by the first seal wire 10 from institute It states in sacculus dilating catheter and withdraws from, contrast agent is injected to lesion locations to observe by the perforative pipeline of first seal wire 10 Diseased region is placed in the first seal wire 10 after carrying out radiography again.

Still there are many embodiment, all technologies formed using equivalents or equivalent transformation for the utility model Scheme is all fallen within the protection scope of the utility model.

Claims (8)

1. Seal wire medicine balloon dilating catheter more than 1., it is characterised in that: be coated with medicine including sequentially connected tip tube (1), surface The sacculus (3) of object coating and have twin-channel conduit (5),

   One first seal wire (10) is in turn through tip tube (1), first through hole (2) and across behind the outer surface of the sacculus (3) Enter a channel of conduit (5), the line and the ball of the first through hole (2) and the second through-hole (4) by the second through-hole (4) The axis of capsule is parallel；

   It further include the second seal wire of at least one (11), setting is external in the sacculus (3), and at least from the sacculus (3) One end extends to the other end, and length is greater than the sacculus (3) in the length of contraction state.
2. 2. more seal wire medicine balloon dilating catheters according to claim 1, it is characterised in that: the medication coat is in anti- The coating of film hyperplasia similar drug.
3. 3. more seal wire medicine balloon dilating catheters according to claim 1, it is characterised in that: the sacculus (3) is whole Crossover or rapid-exchange version, and it has 3-6 bending and the respectively wing of sacculus periphery in a folded configuration.
4. 4. more seal wire medicine balloon dilating catheters according to claim 1, it is characterised in that: the first of the conduit (5) Channel (13) is circle, and second channel (12) is semilune.
5. 5. more seal wire medicine balloon dilating catheters according to claim 1 to 4, it is characterised in that: second seal wire (11) along the sacculus axis direction extend and with the first seal wire (10) divide equally the sacculus periphery or second seal wire (11) axis direction along the sacculus is spirally wound on sacculus periphery.
6. 6. more seal wire medicine balloon dilating catheters according to claim 5, it is characterised in that: second seal wire (11) Length is more than the length 1-100mm of the sacculus (3) in contraction state.
7. 7. more seal wire medicine balloon dilating catheters according to claim 5, it is characterised in that: second seal wire (11) Quantity is not less than 2, and is additionally provided on second seal wire (11) a pair of for indicating the thin-walled developing ring (9) of balloon position.
8. 8. more seal wire medicine balloon dilating catheters according to claim 5, it is characterised in that: the freedom of the conduit (5) End connection Y connector (6), the Y connector (6) cooperatively form sacculus air flue with conduit (5) and can be by the first seal wires (10) perforative multifunctional channel, and two interfaces of the Y connector (6) are female Luer.