SUMMERY OF THE UTILITY MODEL
The utility model provides a but injection sacculus expansion pipe for solve current sacculus expansion and intervene the treatment operation in-process, be difficult to realize dosing and control the problem of type and dosage of dosing to the pathological change position.
The utility model aims at providing a balloon dilatation catheter capable of injecting medicine, which comprises a catheter main body and a balloon fixed on the catheter main body, wherein the catheter main body extends from a near end to a far end, the side wall of the catheter main body is provided with at least one medicine spraying hole, and the medicine spraying hole is positioned between the far end of the catheter main body and the balloon; the catheter main body is also internally provided with a guide wire cavity which runs through to the far end from the near end, an inflation cavity which runs through to be communicated with the balloon from the near end, and a medicine feeding cavity which runs through to be communicated with the medicine spraying hole from the near end.
The catheter base is connected to the proximal end of the catheter main body and comprises a first connecting port, a second connecting port and a third connecting port, and the first connecting port is communicated with the guide wire cavity; the second connecting port is communicated with the inflation cavity; the third connecting port is communicated with the drug feeding cavity.
Further, the aperture of the spraying hole is 0.01mm to 2 mm.
Further, the balloon may be attached to the catheter body by means of gluing, hot-melt welding, high-frequency welding or laser welding.
Further, the distal end of the catheter main body comprises a soft head, and the soft head is made of at least one material of silica gel, polyether amide, nylon, thermoplastic polyurethane and polyvinyl chloride.
Furthermore, the catheter main body comprises a first sleeve, a second sleeve and a third sleeve which are sequentially sleeved from inside to outside, and a guide wire cavity is formed in the first sleeve; an inflation cavity is formed between the first sleeve and the second sleeve; a dosing cavity is formed between the second sleeve and the third sleeve; or the like, or, alternatively,
the catheter main body comprises an inner sleeve, an outer sleeve and at least one partition plate, and a guide wire cavity is formed inside the inner sleeve; the outer sleeve is sleeved on the outer portion of the inner sleeve and forms a cavity with the inner sleeve, and the partition plate is arranged between the inner sleeve and the outer sleeve and separates the cavity into an inflation cavity and a medicine feeding cavity.
The utility model provides a sacculus expansion pipe is through setting up the medicine cavity and spouting the medicine hole, can adjust the type of dosing, dose and number of times according to the demand, compares with prior art's medicine elution sacculus pipe for it is corresponding to have more to intervene the treatment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
In the field of interventional medical devices, it is defined that the end relatively close to the operator is the proximal end and the end relatively far is the distal end.
Referring to fig. 1 to 3, a first embodiment of the present invention provides a drug-injectable balloon dilatation catheter, comprising a catheter main body 1 and a balloon 2 fixed on the catheter main body 1, wherein the catheter main body 1 extends from a proximal end to a distal end, and the sidewall thereof is provided with at least one drug spraying hole 10, and the drug spraying hole 10 is located between the distal end of the catheter main body 1 and the balloon 2; the catheter main body 1 is also internally provided with a guide wire cavity 11 which penetrates from the near end to the far end, an inflation cavity 12 which penetrates from the near end to be communicated with the balloon 2, and a drug delivery cavity 13 which penetrates from the near end to be communicated with the drug spraying hole 10.
The balloon dilatation catheter capable of injecting the medicine can be penetrated with a guide wire through the guide wire cavity 11; the balloon 2 can be inflated through the inflation cavity 12 to realize the expansion of the balloon 2; the medicine can be sprayed to the lesion part through the medicine feeding cavity 13 and the medicine spraying hole 10, and the medicine treatment of the lesion part is realized.
The balloon dilatation catheter provided by the embodiment is suitable for natural lumen stenosis dilatation operations such as blood vessels, upper digestive tracts and the like, does not need to insert the medicine spray pipe into the body of a patient again, and can adjust the administration type, dosage and times according to requirements, so that interventional therapy has pertinence.
Further, the drug-injectable balloon dilatation catheter further comprises a catheter holder 3, wherein the catheter holder 3 is connected to the proximal end of the catheter body 1 and comprises a first connecting port 31, a second connecting port 32 and a third connecting port 33, and the first connecting port 31 is communicated with the guide wire cavity 11; the second connecting port is communicated with the inflation cavity 12; the third connection port 33 communicates with the administration chamber 13.
Further, the catheter main body 1 comprises a first sleeve 1a, a second sleeve 1b and a third sleeve 1c which are sleeved from inside to outside in sequence, and a guide wire cavity 11 is formed inside the first sleeve 1 a; a gas-filled cavity 12 is formed between the first sleeve 1a and the second sleeve 1 b; the second sleeve 1b and the third sleeve 1c form a dosing cavity 13 therebetween. The catheter main body provided by the scheme is simple in structure, easy to manufacture and capable of effectively saving cost.
In the scheme, the spraying hole structure can be formed by forming a hole on the side wall of the third sleeve 1 c; it is desirable to provide an inflation channel sealed through the administration lumen 13, through which the inflation lumen 12 communicates with the balloon 2.
In an alternative embodiment of the present invention, as shown in fig. 4, the catheter main body includes an inner sleeve 1a ', an outer sleeve 1b ' and at least one partition board 1c ', and a guide wire cavity 11 ' is formed inside the inner sleeve 1a '; the outer sleeve 1b 'is sleeved between the outer part of the inner sleeve 1 a' and the inner sleeve 1a 'to form a cavity, and the partition plate 1 c' is arranged between the inner sleeve 1a 'and the outer sleeve 1 b' to separate the cavity into an inflation cavity 12 'and a dosing cavity 13'. This scheme can form the through-hole that spouts medicine hole and communicate with the gasbag through the direct trompil on outer sheathed tube pipe wall to the preparation degree of difficulty of pipe body has been reduced.
Furthermore, the aperture of the spraying holes is 0.005-2 mm, and the number of the spraying holes is 1-1002. In this embodiment, the aperture of the spraying holes is 0.5mm, and the number of the spraying holes is 24.
It should be noted that, the balloon dilatation catheter provided in this embodiment may be used to spray one or more active drugs, including but not limited to drugs for inhibiting vascular proliferation, anti-platelet drugs, anti-thrombotic drugs, or anti-inflammatory drugs. The angiogenesis inhibitor can be paclitaxel, rapamycin and its derivatives; the antiplatelet agent may be cilostazol; the antithrombotic agent may be heparin; the anti-inflammatory drug may be dexamethasone.
Further, the balloon may be made from a variety of materials, including, but not limited to, polyethylene terephthalate (PET), Polyetherimide (PEI), Polyethylene (PE), Polytetrafluoroethylene (PTFE), expanded polytetrafluoroethylene (ePTFE), ethylene tetrafluoroethylene copolymer (ETFE), Fluorinated Ethylene Propylene (FEP), Polyoxymethylene (POM), polybutylene terephthalate (PBT), block polyetherester, polyurethane, polypropylene (PP), polyvinyl chloride (PVC), polyetherester, polyester, polyamide, elastic polyamide, block polyamide/ester, block polyetheramide, silicone, Marlex high density polyethylene, Marlex low density polyethylene, linear low density polyethylene, Polyetheretherketone (PEEK), Polyimide (PI), polyphenylene sulfide (PPS), polyphenylene oxide (PPO), polysulfone, nylon, perfluoro (vinyl propyl ether) (PFA), one or a mixture of several of them.
Further, the balloon may be attached to the catheter body by means of bonding or laser welding.
Further, the distal end of the catheter main body comprises a soft head, and the soft head is made of one of silica gel, polyether amide, nylon, thermoplastic polyurethane and polyvinyl chloride. In this embodiment, the soft head is made of a silicone material.
The above description is only for the preferred embodiment of the present invention, and should not be taken as limiting the invention, and all modifications, equivalents, improvements and the like that are made within the spirit and principles of the present invention should be included within the scope of the present invention.