The utility model relates to a balloon dilating catheter. The balloon dilating catheter comprises a balloon, developing signs, a catheter body and a tee handle. One end of the catheter body is connected with the balloon and penetrates through the balloon, the catheter body extends to the other end of the balloon from one end of the balloon, and the other end of the catheter body is connected with the tee handle. The tee handle is provided with a liquid injection opening, the liquid injection opening is communicated with the catheter body, and the catheter body placed inside the balloon is provided with a liquid injection hole and a plurality of developing signs.
The balloon comprises an outer layer balloon and an inner layer balloon, and the inner layer balloon is coated with the outer layer balloon. The balloon dilating catheter is simple in structure and convenient to use, the reliability of the balloon dilating catheter can be improved, the risk of liquid leakage caused by balloon blasting in traditional surgery is reduced, time is saved for balloon dilating surgery, the pains of patients are lightened, and the operation quality is effectively improved.
A balloon dilatation catheter, characterized in that: comprising a balloon, a developing markers, catheters and tee handle, one end of said conduit and connected to the balloon through the balloon, the balloon extending from one end to the other end of the balloon, the connect the other end of said conduit tee handle, the handle is provided tee pour opening, said liquid injection port and through said catheter, said catheter balloon is located within the injection hole and provided with a plurality of developing signs , the outer balloon and the inner balloon comprising a balloon, the outer balloon covering the inner balloon.
2. The balloon according to claim dilatation catheter, characterized in that: said plurality of developing signs are situated at either end of the balloon catheter and between the liquid inlets.
2 3. The balloon dilatation catheter of claim, characterized in that: the number of the developing flag is two.
1 4. The balloon dilatation catheter of claim, wherein: the outer layer is nylon balloon material.
1 5. The balloon dilatation catheter of claim, wherein: the balloon material of the inner layer is a polymer material.
5 6. The balloon dilatation catheter of claim, wherein: the balloon material of the inner layer is a polyimide material.
One kind of balloon dilatation catheters
 The utility model belongs to the field of medical devices, to a balloon dilatation catheter.
 In the clinical diagnostic process, often encounter patients with symptoms of gastrointestinal stenosis due to various causes, in the course of their treatment, the clinician convenient for surgery, balloon dilatation catheters are often used for this type of disease the risk for expansion. Balloon dilatation of the prior art, through injectable liquid into the single balloon, gradually filling the balloon by balloon expansion, in order to achieve a narrow body cavity expansion. However, due to the uneven thickness of the balloon, easily injectable liquid in the process, causing the balloon burst, bringing the second surgery, prolong the operation time, bring some pain to the patient.
 The utility model technical problem to be solved is: to overcome the prior art balloon breakable, difficult surgery, could easily lead to technical problems second surgery to patients, to provide a double-balloon, only direct on the inner balloon injection-liquid, it can achieve the purpose of expanding the balloon dilatation catheter.
 The technical scheme of the utility model for solving the technical problem is adopted: to provide a balloon dilatation catheters, including balloon developing signs, catheters and tee handle, connect one end of the balloon and the catheter through the balloon, balloon extending from one end to the other end of the balloon, the catheter handle and the other end connected to the three-way, three-way handle the pour opening is provided, the liquid injection port and through the conduit, located within the balloon with a catheter injection hole and a plurality of developing signs, the balloon includes an outer balloon and the inner balloon, the inner layer of the outer balloon coated balloon.
 As the utility model of the kind of balloon dilatation catheters A preferred embodiment, the plurality of developing signs are situated at either end of the balloon catheter and injection hole between.
 The utility model as a balloon catheter a preferred option, the number of the signs of developing into two.
 The utility model as the one preferred embodiment of a balloon catheter, the outer layer of the balloon material is nylon.
 The utility model as a balloon catheter a preferred embodiment, the material of the inner balloon is a polymer material.
 The utility model as a balloon catheter a preferred embodiment, the material of the inner balloon is a polyimide material.
 The invention has the advantages that the utility model of a balloon catheter, the balloon dilatation catheter to replace the single as a double set of balloon dilatation catheters, simple structure, easy to use, to reduce the traditional risk surgery due to the balloon burst and cause liquid leakage, as balloon angioplasty save time, reduce the number to replace the balloon after balloon burst, reducing the patient's pain, thus effectively improving the quality of surgery.
 The utility model further below in conjunction with the accompanying drawings and the description of embodiments.  FIG. 1 is a schematic partial cross-sectional front view of the structure of the utility model of a balloon dilatation catheter of the preferred embodiment;
 FIG. 2 is an enlarged structural diagram in Figure 1 at A.
 Fig: 1 is the outer layer of the balloon, the inner balloon 2, 3 to the developing signs of conduit 4, 5 tee handle, the injection hole 6, 7 is a liquid injection port.
 The utility model is a balloon dilatation catheter described, comprising: a balloon (not shown), a developing mark 3, 4 and three-way catheter handle 5, connect one end of the balloon catheter 4 and runs through the ball capsule, balloon balloon extending from one end to the other end, the other end of the pipe 4 from the tee handle 5, the tee handle 5 is provided with injection port 7, the injection port and the duct 4 through 7 , located within the catheter balloon is provided with 4 injection hole 6 and a plurality of developing mark 3, the balloon includes an outer balloon and the inner balloon I 2, I covered the outer balloon The inner balloon 2.
 The present utility model will now make a detailed description of the further figures. The figures are simplified schematic, only schematically illustrate the basic structure of the utility model, so it displays only the constitution and the utility model-related.
 Please refer to FIG. 1, FIG. 1 is a partial cross-sectional configuration utility a new schematic front view of a balloon dilatation catheter of. 1, the one balloon dilatation catheter, comprising: a balloon (not shown), a developing signs 3, 4 and conduit 5 tee handle.
 The balloon catheter 4 is fixedly connected at one end of the balloon catheter 4 from the balloon through to the other end, and extend outwardly away from one end of the balloon catheter 4 is connected to a tee handle 5, three provided with handle 5 through injection port 7, the injection port and the conduit 4 through 7.
 4 located on the catheter balloon is provided within the injection hole 6 and a plurality of developing mark 3, this time, the injection hole 6 with a plurality of the developing mark 3 are coated balloon inside .
 In one embodiment, the flag 3 is divided into a plurality of developing either end between the balloon and the injection hole 6 of conduit 4, this time, a plurality of said developing flag provided in the injection hole 3 6 sides. Most preferably, the mark developing number 3 is two.
 See Figure 2, Figure 2 is an enlarged schematic structure A in Fig 1. 1 in conjunction with Figure 2, the balloon comprising an inner balloon and an outer balloon I 2, the outer covering of the inner balloon balloon I 2. Because I need to contact with the outer balloon gastrointestinal mucosa, the outer layer of the balloon in order to make good sense I contact with mucous membranes, and has flexibility, the outer layer of material I choose nylon balloon, good effect of its expansion, and the cost low. 2 the inner balloon material elongation good choice of polymer materials, more preferably, the polymer material is a polyimide material having good elongation, high tensile strength characteristics.
 The balloon dilatation catheter of the above-described components include, but are not limited to the above-mentioned types.
 The balloon catheter according to the utility model works as follows:
 The unexpanded balloon dilatation catheter slowly into the narrow portion of the digestive tract, and the discharge portion of the balloon to a predetermined position, the use of balloon pressure pump (not shown) through a pour opening 7 to the tee handle 5 pouring the liquid along with the tee handle 5 communicating conduit flow to the injection hole 6, and flows out from the injection hole 6, gradually filling the inner balloon 2, the inner layer balloon 2 larger, in order to achieve the digestive tract stenosis slow expansion until after the expansion is completed, then the inner balloon deflated balloon pressure pump 2, and then withdraw the balloon dilatation catheter.
 ordinary skill in the field should be able to understand that one of the characteristics or the utility model aims: according to the utility model balloon dilatation catheter balloon through improved structure to solve the balloon during surgery Blow problem. The utility model of the balloon dilatation catheter of simple structure, easy to use, which can improve the reliability of the balloon dilatation catheter, reducing the risk of traditional surgery due to the balloon burst and cause liquid leakage, as balloon angioplasty savings time, reducing the patient's pain, effectively improve the quality of surgery.
 In accordance with the present utility model above the ideal embodiment of inspiration, the contents of the above description, the relevant staff can without departing from the scope of this practical new technology ideas, carry out a variety of changes and modifications. The utility model of technical scope is not limited to the contents of the instructions on the need to be determined according to its technical scope of the claims.