Extending and dilating guide catheter

Abstract

The utility model discloses an extension and expansion guide catheter, which particularly relates to the technical field of medical instruments and comprises an expansion catheter, an extension push rod and a fingertip grip. The dilation catheter comprises a front-end catheter body and a rear-end catheter body, the front-end catheter body is conical, the rear-end catheter body is cylindrical, the large-diameter end of the front-end catheter body is fixedly connected with one end of the rear-end catheter body, the other end of the rear-end catheter body is fixedly connected with one end of an extension pushing rod, and the other end of the extension pushing rod is fixedly connected with the other end of the extension pushing rod. The other end of the extension push rod is fixedly connected with the head of the fingertip grip, and the guide wire is arranged in the expansion catheter in a penetrating mode. By arranging the dilation catheter, the conveying difficulty of the extension dilation guide catheter is reduced, and the success rate of interventional surgery operation is increased; by arranging the extension push rod, the expansion catheter is convenient to push, and by means of the shape of the expansion catheter, complications such as vascular injury caused by pushing the catheter in the traditional interventional operation process are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, and more specifically, to an extension and dilation guide catheter. Background Art

[0002] It is known that percutaneous intravascular interventional therapy has become the main means of minimally invasive treatment for many diseases in clinical practice; among them, the basic method of intravascular interventional therapy is: first puncture the peripheral blood vessels, and insert a thinner guide wire (usually 0.035 inches) into the blood vessel through the puncture needle, and then insert a sheath (vascular sheath) of about 30 cm in length through the guide wire to establish a passage between the outside of the body and the vascular cavity; then insert a guiding catheter of about 100 cm from the sheath, and extend the guiding catheter through the vascular cavity to the blood vessel (target blood vessel) at the treatment site to establish a passage from the outside of the body to the target blood vessel; finally, insert a balloon, stent, coil or other treatment device through the passage (i.e., into the guiding catheter) to treat the target blood vessel; due to different The diameter of the vascular sheath varies depending on the interventional operation and the selected instrument, and most of them range from 5F to 12F. The outer and inner diameters of the common sheaths are consistent from beginning to end. During the sheath insertion process, in order to facilitate the delivery of the vascular sheath into the blood vessel through a thinner guide wire, an expansion catheter from thick to thin is designed in the puncture sheath to form a vascular sheath set. During the operation, after the sheath is pushed into the blood vessel under the guidance of the expansion tube, the internal expansion tube is withdrawn and the sheath is retained in the blood vessel, and the operation is successfully completed. In order to ensure the successful insertion of the sheath, in addition to the sheath itself, the design of the expansion catheter is also very important. A good sheath set can not only ensure the success of the operation, but also reduce patient pain, local vascular damage and complications at the puncture site.

[0003] Among them, the guiding catheters currently available on the market for various vascular interventional treatments are divided into 4F, 5F, 6F, 7F, 8F, 9F, etc. according to their outer diameters. Their head sections are also designed with different curvatures and shapes according to the target blood vessels to ensure that the catheter can be delivered to blood vessels with different opening origins. Generally, the guiding catheter needs to be delivered to the target blood vessel through a guide wire of about 150 cm in length.

[0004] However, in actual use, there is a problem that the diameter of the guiding catheter pushed through the guiding wire in the blood vessel obviously does not match the outer diameter of the guiding wire. The outer diameter of the guiding catheter is obviously larger than the outer diameter of the guiding wire. There is a lack of a transition link between the head end of the guiding catheter and the guiding wire, such as a "fish mouth shape", and the guiding catheter has a large resistance to entering the blood vessel. When encountering obvious distortion of the blood vessel path, local stenosis or spasm, the guiding catheter cannot be pushed into place. Forced pushing may cause vascular damage, lead to serious vascular complications, and ultimately make the interventional surgery unsuccessful. Therefore, an extended expansion guide catheter is proposed as a further improvement. Utility Model Content

[0005] In order to overcome the above-mentioned defects of the prior art, an embodiment of the present invention provides an extension dilation guide catheter to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solutions: an extension dilation guide catheter, the extension dilation guide catheter comprising: a dilation catheter, an extension push rod and a fingertip grip;

[0007] The dilatation catheter includes: a front end catheter and a rear end catheter, the shape of the front end catheter is set to be conical, and the shape of the rear end catheter is set to be cylindrical, the end of the front end catheter with a larger diameter is fixedly connected to one end of the rear end catheter, the other end of the rear end catheter is fixedly connected to one end of the extension push rod, and the other end of the extension push rod is fixedly connected to the head of the fingertip grip, and the guide wire is passed through the interior of the dilatation catheter.

[0008] Furthermore, a hollow cavity is defined inside the dilatation catheter, and a diameter of the hollow cavity is not less than 0.035 inches.

[0009] Furthermore, the maximum outer diameter of the front end conduit is the same as the outer diameter of the rear end conduit.

[0010] Furthermore, the surface of the dilatation catheter is provided with a clear water coating.

[0011] Furthermore, the length of the extended push rod is set to at least 130 cm.

[0012] Furthermore, the outer diameter of the dilatation catheter is set in the range of 4F-12F.

[0013] The technical effects and advantages of this utility model are:

[0014] Compared with the existing technology, by setting up an expansion catheter, the difficulty of delivering the extended expansion guide catheter is reduced, and the success rate of interventional surgery is increased; by setting up an extended push rod, it is easier to push the expansion catheter, and by utilizing the shape of the expansion catheter, complications such as vascular damage caused by pushing the catheter during traditional interventional operations are reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0016] Figure 2 It is a structural schematic diagram of the hollow cavity of the utility model.

[0017] Figure 3 This is a schematic diagram of the cross-sectional structure of the utility model.

[0018] The accompanying drawings are:

[0019] 1. Dilatation catheter; 11. Front catheter; 12. Back catheter;

[0020] 2. Extend the push rod;

[0021] 3. Fingertip grip;

[0022] 4. Hollow cavity. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0024] As attached Figure 1 , Attachment Figure 2 and attached Figure 3 An extension and dilation guide catheter is shown, which comprises: a dilation catheter 1, an extension push rod 2 and a fingertip grip 3;

[0025] The dilatation catheter 1 includes: 12, the shape of the front end catheter 11 is set to be conical, the shape of the rear end catheter 12 is set to be cylindrical, the end of the front end catheter 11 with a larger diameter is fixedly connected to one end of the rear end catheter 12, the other end of the rear end catheter 12 is fixedly connected to one end of the extension push rod 2, the other end of the extension push rod 2 is fixedly connected to the head of the fingertip grip 3, and the guide wire is passed through the interior of the dilatation catheter 1.

[0026] The front end of the dilatation catheter 1 is designed to be placed in the guide catheter. The tip of the front end of the dilatation catheter 1 is a tapered cone, which has a dilatation guiding function.

[0027] In a preferred embodiment, as shown in the attached Figure 1 , Attachment Figure 2 and attached Figure 3 As shown, a hollow cavity 4 is defined within the dilatation catheter 1, and the diameter of the hollow cavity 4 is not less than 0.035 inches. The hollow cavity 4 allows the interior of the dilatation catheter 1 to accommodate a 0.014-inch or 0.035-inch guide wire or guide catheter, thereby facilitating smooth delivery of the auxiliary extension dilatation guide catheter to the target lesion in the body, thereby overcoming the defects and shortcomings of conventional technologies.

[0028] The length of the dilatation catheter 1 is set to 20 cm;

[0029] In a preferred embodiment, as shown in the attached Figure 1 , Attachment Figure 2 and attached Figure 3As shown, the maximum outer diameter of the front catheter 11 is the same as the outer diameter of the rear catheter 12; so that after the front catheter 11 enters the blood vessel and gradually expands the blood vessel to the diameter of the rear catheter 12, blood vessel damage caused by the difference in outer diameters between the front catheter 11 and the rear catheter 12 is avoided.

[0030] In a preferred embodiment, as shown in the attached Figure 1 , Attachment Figure 2 and attached Figure 3 As shown, the surface of the dilatation catheter 1 is provided with a clear water coating to improve the smoothness of the dilatation catheter 1 entering the blood vessel.

[0031] In a preferred embodiment, as shown in the attached Figure 1 , Attachment Figure 2 and attached Figure 3 As shown, the length of the extended push rod 2 is set to at least 130 cm.

[0032] In a preferred embodiment, as shown in the attached Figure 1 , Attachment Figure 2 and attached Figure 3 As shown, the outer diameter of the dilatation catheter 1 is set in the range of 4F-12F.

[0033] The tail section of the extension push rod 2 is provided with a limited protrusion or a fixing device so that the extension push rod 2 can be fixed to an external fixing frame to prevent the position of the extension push rod 2 from changing during the operation.

[0034] The working principle of the utility model is as follows: first, the peripheral blood vessels are punctured, and a thinner guide wire is inserted into the blood vessels through the puncture needle; then, an extended dilation guide catheter is inserted through the guide wire: the dilation catheter 1 and the extended push rod 2 are controlled by the fingertip grip 3 to sequentially enter the blood vessels, and the front end catheter 11 of the dilation catheter 1 is in a gradually tapering conical shape, which gradually expands the blood vessels to the diameter of the rear end catheter 12, thereby achieving the function of dilating the vagina and avoiding vascular damage.

[0035] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0036] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An extension and dilation guide catheter, characterized by: The extension dilation guide catheter comprises: a dilation catheter (1), an extension push rod (2) and a fingertip grip (3); The dilatation catheter (1) comprises: a front catheter (11) and a rear catheter (12); the front catheter (11) is shaped as a cone, and the rear catheter (12) is shaped as a cylinder; the end of the front catheter (11) with a larger diameter is fixedly connected to one end of the rear catheter (12); the other end of the rear catheter (12) is fixedly connected to one end of an extension push rod (2); the other end of the extension push rod (2) is fixedly connected to the head of a fingertip grip (3); and a guide wire is passed through the interior of the dilatation catheter (1).

2. The extension and dilation guide catheter according to claim 1, characterized in that: A hollow cavity (4) is provided inside the dilatation catheter (1), and the diameter of the hollow cavity (4) is not less than 0.035 inches.

3. The extension and dilation guide catheter according to claim 1, characterized in that: The maximum outer diameter of the front end conduit (11) is the same as the outer diameter of the rear end conduit (12).

4. The extension and dilation guide catheter according to claim 1, characterized in that: The surface of the dilatation catheter (1) is provided with a clear water coating.

5. The extension and dilation guide catheter according to claim 1, characterized in that: The length of the extended push rod (2) is set to at least 130 cm.

6. The extension and dilation guide catheter according to claim 3, characterized in that: The outer diameter of the dilatation catheter (1) is set in the range of 4F-12F.

Images