阅读说明：本技术 一种医用导管及医用系统 (Medical catheter and medical system ) 是由 崔玉佳 汪振 王雄伟 朱鑫建 黄基锐 于 2020-04-08 设计创作，主要内容包括：本发明涉及一种医用导管和医用系统,所述治疗装置包括所述医用导管,所述医用导管包括呈中空结构的主导管,所述主导管包括管本体,所述管本体具有沿其轴向贯通的内腔,所述内腔的腔壁上设置有至少一层内衬层,所述内衬层的硬度大于所述主导管的硬度。所述内衬层用于对所述管本体提供支撑力,使得所述主导管在人体的自然腔道中行进或留置于人体自然腔道内时不会发生弯折,提高所述主导管的可控性和推送性,改善治疗效果。(The invention relates to a medical catheter and a medical system, wherein the treatment device comprises the medical catheter, the medical catheter comprises a main catheter which is of a hollow structure, the main catheter comprises a catheter body, the catheter body is provided with an inner cavity which is axially communicated along the catheter body, at least one layer of lining layer is arranged on the wall of the inner cavity, and the hardness of the lining layer is greater than that of the main catheter. The inner liner is used for right the pipe body provides the holding power, makes main duct can not take place to buckle when advancing or keeping somewhere in human natural chamber way, improves main duct's controllability and propelling movement nature improve treatment.)

1. The medical catheter is characterized by comprising a main catheter, wherein the main catheter comprises a catheter body, the catheter body is provided with an inner cavity which is communicated along the axial direction of the catheter body, the wall of the inner cavity is provided with at least one layer of inner liner, and the hardness of the inner liner is greater than that of the main catheter.

2. The medical catheter of claim 1, wherein the inner liner extends axially of the tube body with a distal end of the inner liner flush with the distal end of the tube body and a proximal end of the inner liner flush with the proximal end of the tube body.

3. The medical catheter of claim 1, wherein the tube body has a shore hardness of 86A-96A and the inner liner layer has a shore hardness of 60D-80D.

4. The medical catheter of claim 1, wherein the inner liner is a mesh structure.

5. The medical catheter of claim 1, wherein the inner liner comprises a spring structure disposed coaxially with the tube body, and an outer surface of the spring structure is connected with a wall of the lumen of the tube body.

6. The medical catheter as claimed in claim 3 or 4, wherein the inner liner is connected to the tube body by heat shrinking.

7. The medical catheter of claim 1, wherein the inner liner is a metal layer.

8. The medical catheter of claim 1, wherein the main catheter has opposite proximal and distal ends, the medical catheter further comprising a manifold and a balloon, the manifold being disposed on the main catheter at a location proximal to the proximal end, the balloon being sleeved on the main catheter at a location proximal to the distal end, and the balloon being in communication with the manifold.

9. The medical catheter of claim 8, wherein the main catheter defines a suction aperture therein, the suction aperture being disposed at a distal end of the main catheter.

10. The medical catheter of claim 1, wherein the medical catheter is an alimentary tract catheter.

11. A medical system comprising a medical catheter as claimed in any one of claims 1 to 10 and a guidewire disposed through the lumen of the tube body.

12. The medical system of claim 11, wherein the main catheter has a proximal end and a distal end opposite to each other, a manifold is disposed on the main catheter at a position near the proximal end, and a balloon is sleeved on the main catheter at a position near the distal end and is communicated with the manifold; the medical system further includes a balloon valve for connection with the manifold and a suction device for connection with the proximal end of the main catheter.

13. The medical system of claim 12, wherein the proximal end of the tube body defines an air hole extending therethrough in an axial direction thereof, the air hole being configured to communicate the balloon with the manifold.

Technical Field

The invention relates to the technical field of medical instruments, in particular to a medical catheter and a medical system.

Background

Adhesive Intestinal Obstruction (Adhesive Intestinal Obstruction) refers to the failure of Intestinal contents to pass through the Intestinal tract smoothly due to intra-abdominal Intestinal adhesion caused by various reasons. When intestinal contents are obstructed, a series of symptoms such as abdominal distension, abdominal pain, nausea, vomiting and defecation disorder occur. The middle part of the adhesive ileus is small ileus, and the previous investigation and statistics show that the small ileus accounts for about 40 percent of the ileus.

At present, the non-operative treatment process for small intestinal obstruction is mainly characterized by that a catheter is inserted into the stomach of a patient from nasal cavity, the position of the patient is regulated, the catheter can be passed through the large bend of stomach, then fed into the small intestine indwelling position, and then the catheter can be carried to the obstruction position by means of peristalsis of small intestine. During the passage of the catheter from the indwelling site to the obstructive site, suction is applied with a suction device to expel the intestinal contents from the catheter. During this treatment, the catheter needs to be left in the patient for 3-14 days, which is longer for patients with weak peristalsis. The existing catheter for treating intestinal obstruction is a long silicone tube, has soft texture, has poor pushing performance and controllability in the process of pushing the catheter to the obstruction part, and is easy to bend during the indwelling period of a patient body, so that the catheter is blocked, the curative effect is influenced, and even the catheter needs to be reset.

Disclosure of Invention

The invention aims to provide a medical catheter and a medical system, wherein the medical catheter is not easy to bend in the process of introducing the medical catheter into a patient body, and has good controllability and pushing performance.

In order to achieve the purpose, the invention provides a medical catheter which comprises a main catheter, wherein the main catheter comprises a catheter body, the catheter body is provided with an inner cavity which is communicated along the axial direction of the catheter body, the cavity wall of the inner cavity is provided with at least one layer of lining layer, and the hardness of the lining layer is greater than that of the main catheter.

Optionally, the inner liner extends along the axial direction of the pipe body, and the distal end of the inner liner is flush with the distal end of the pipe body, and the proximal end of the inner liner is flush with the proximal end of the pipe body.

Optionally, the shore hardness of the pipe body is 86A-96A, and the shore hardness of the inner liner layer is 60D-80D.

Optionally, the inner liner is a mesh structure.

Optionally, the inner liner includes a spring structure, the spring structure is coaxially arranged with the tube body, and an outer surface of the spring structure is connected with a cavity wall of the inner cavity of the tube body.

Optionally, the inner liner is connected with the pipe body in a heat shrinkage mode.

Optionally, the lining layer is a metal layer.

Optionally, the main catheter has a proximal end and a distal end opposite to each other, the medical catheter further includes a manifold and a balloon, the manifold is disposed on a position where the main catheter is close to the proximal end, the balloon is sleeved on a position where the main catheter is close to the distal end, and the balloon is communicated with the manifold.

Optionally, the main catheter is provided with a suction hole, and the suction hole is arranged at the distal end of the main catheter.

Optionally, the medical catheter is a digestive tract catheter.

In order to achieve the above object, the present invention further provides a medical system, which includes a guide wire and the medical catheter as described in any one of the above, wherein the guide wire is inserted into the inner cavity of the tube body.

Optionally, the main catheter has a proximal end and a distal end opposite to each other, a manifold is disposed at a position of the main catheter close to the proximal end, a balloon is sleeved at a position of the main catheter close to the distal end, and the balloon is communicated with the manifold; the medical system further includes a balloon valve for connection with the manifold and a suction device for connection with the proximal end of the main catheter.

Optionally, the proximal end of the tube body is provided with an air hole which is axially communicated along the tube body, and the air hole is used for communicating the balloon and the manifold

Compared with the prior art, the medical catheter and the medical system have the following advantages:

the medical catheter comprises a main catheter, wherein the main catheter is provided with an inner cavity which is communicated along the axial direction of the main catheter, and a metal lining is arranged on the cavity wall of the inner cavity. In the process of pushing the medical catheter into a patient body along a natural cavity of the human body, the metal lining plays a supporting role on the main catheter, so that the medical catheter is prevented from being bent, the pushing performance and controllability of the medical catheter are improved, and discomfort of the patient is reduced.

Drawings

FIG. 1 is a schematic structural view of a medical catheter according to an embodiment of the present invention;

FIG. 2 is an axial cross-sectional view of a medical catheter in accordance with an embodiment of the present invention, showing an inner liner in a mesh configuration;

FIG. 3 is an axial cross-sectional view of a medical catheter in accordance with an embodiment of the present invention, illustrating an inner liner including a spring structure;

fig. 4 is a cross-sectional view a-a of the medical catheter shown in fig. 1.

[ reference numerals are described below ]:

100-a medical catheter;

110-a main conduit;

111-tube body, 112-lining layer, 113-second suction hole, 114-air hole;

120-a manifold;

130-a balloon;

200-balloon valve.

Detailed Description

To further clarify the objects, advantages and features of the present invention, a more particular description of the invention will be rendered by reference to the appended drawings. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention.

As used in this specification, the singular forms "a," "an," and "the" include plural referents unless the content clearly dictates otherwise. As used in this specification, the term "or" is generally employed in its sense including "and/or" unless the content clearly dictates otherwise, and the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either fixedly connected, detachably connected, or integrally connected. Either mechanically or electrically. Either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations. The same or similar reference numbers in the drawings identify the same or similar elements.

Herein, the terms "proximal" and "distal" are relative orientations, relative positions, directions of elements or actions with respect to each other from the perspective of an operator using the medical device, although "proximal" and "distal" are not limiting, but "proximal" generally refers to the end of the medical device that is closer to the operator during normal operation, and "distal" generally refers to the end that is first introduced into the patient.

The invention aims to provide a medical catheter which can be guided into a preset position in a patient body along a natural cavity of the human body so as to treat diseases. The medical catheter may be a digestive tract catheter and the predetermined location may be, for example, a location of ileus such that the medical catheter may be used to treat ileus, i.e., the medical catheter may be an ileus catheter. For convenience of description, the medical catheter is described as an ileus catheter.

Referring to fig. 1 and 2, the medical catheter 100 includes a main catheter 110, the main catheter 110 includes a catheter body 111, the catheter body 111 has an inner cavity running through along an axial direction of the main catheter body, a lining layer 112 is disposed on a cavity wall of the inner cavity, and a hardness of the lining layer 112 is greater than a hardness of the catheter body 111. Alternatively, the shore hardness of the tube body 111 may be between 86A-96A, such as 86A, 87A, 89A, 90A, 91A, 93A, 94A, 95A, 96A. The shore hardness of the inner liner 112 may be between 60D-80D, such as 60D, 63D, 68D, 70D, 75D, 77D, 80D, and the like.

When the medical catheter is introduced into a patient, the catheter body 111 is in contact with human tissues, and the lining layer 112 provides a supporting force for the catheter body 111, so that the main catheter 110 is not easy to bend when passing through the human body, such as intestinal tracts, thereby improving the pushing performance and controllability of the main catheter 110, shortening the catheter placement time and reducing the discomfort of the patient. During the indwelling period of the catheter in the patient, the lining layer 112 continuously supports the tube body 111, so that the main catheter 110 of the small intestine bending section is not bent to cause blockage, and the treatment effect is ensured. The inner liner layer 112 extends along the axial direction of the pipe body 111, and preferably, the proximal end of the inner liner layer 112 is flush with the proximal end of the pipe body 111, and the distal end of the inner liner layer 112 is flush with the distal end of the pipe body 111.

In this embodiment, the lining layer 112 is attached to the wall of the inner cavity of the tube body 111. The number of layers of the inner liner 112 may be set as desired, such as one layer, two layers, or even more. Generally, the outer diameter of the main catheter 110 is 5mm to 6mm, and the inner diameter of the main catheter 110 is 3mm to 4mm after the inner liner 112 is disposed.

As shown in FIG. 2, in an exemplary embodiment, the inner liner 112 is a tubular mesh structure. The tube mesh structure can be formed by weaving with woven wires or by cutting with a metal tube, and then the tube mesh structure is attached to the wall of the inner cavity of the tube body 111. In yet another exemplary embodiment, the lining layer 112 includes at least one spring structure, the spring structure is coaxially disposed with the tube body 111, and an outer surface of the spring structure is connected with a cavity wall of the inner cavity of the tube body 111. The inner liner 112 may be formed by splicing a plurality of spring structures arranged along the axial direction of the pipe body 111 according to the length of each spring structure.

In this embodiment, the inner liner 112 and the tube body 111 may be connected by heat shrinking. Specifically, the pipe body 111 and the inner liner 112 are formed in a split manner, the inner liner 111 is sleeved on a metal pipe, the pipe body 111 is sleeved on the outer surface of the inner liner 112, a heat shrink pipe is sleeved on the outer surface of the pipe body 111, the heat shrink pipe is heated, the pipe body 111 and the inner liner 112 are connected under the action of heat, and finally the heat shrink pipe and the metal pipe are removed. The inner liner 112 and the tube body 111 are connected in a heat shrinkage manner, so that the bending resistance of the main catheter 100 can be enhanced.

In this embodiment, the tube body 111 is made of a hydrophilic polymer material, and specifically, a material for manufacturing the tube body 111 includes any one of polyurethane, silicone rubber, polyvinyl chloride, and polyamide. Other hydrophilic polymers meeting the hardness requirements may also be used. The liner layer 112 may be a metal liner layer or a non-metal liner layer. The inner liner 112 may be made of any metallic material including, but not limited to, stainless steel, nitinol, nickel alloys, and titanium alloys. Non-metallic materials that may be used to fabricate the inner liner 112 include, but are not limited to, any of polyethylene, polypropylene, or other polyolefin based materials, polycarbonate, polyamide, polyoxymethylene, and ABS resin. In addition, the material used to fabricate the inner liner 112 should have good smoothness to facilitate the introduction of the main catheter 110 into the patient using a guidewire.

With continued reference to fig. 1, the medical catheter 100 further includes a manifold 120 and a balloon 130, the manifold 120 being disposed on the main catheter 110 near the proximal end and adapted to be connected to a balloon valve. The balloon 130 is sleeved on the main catheter 110 near the distal end, the diameter of the balloon 130 is between 30mm and 40mm, and the length of the balloon is between 4cm and 5 cm. The balloon 130 is in communication with the manifold 120.

In addition, the main duct 110 is further provided with a suction hole at a distal end thereof, the suction hole includes a first suction hole (not shown) and a second suction hole 113, the first suction hole is provided on an end surface of the distal end, and the second suction hole 113 is provided on a side wall of the main duct 110. It is understood that the inner liner 112 should not block the second suction hole 113.

The procedure for treating ileus using the medical catheter is described below.

First, the operator threads the main catheter 110 over the guide wire, connects the manifold 120 to a balloon valve 200, such as a syringe, and connects the proximal end of the main catheter 110 to a suction device (not shown), such as a medical air pump, negative pressure device, as shown in fig. 1.

The operator then pushes the main catheter 110 along the guide wire under the supervision of the X-ray device to a predetermined position inside the patient. In doing so, the balloon 130 is inflated using the balloon valve 200 to inflate the balloon 130, and the inflation of the balloon 130 can be used to open up the adhered intestinal tract, so that the main catheter 110 can be advanced to the predetermined location. At the same time, the suction device generates negative pressure to suck intestinal contents from the first and second suction holes 113 to the main catheter 110, and then to discharge the intestinal contents from the proximal end of the main catheter 110 to the outside of the body.

After the main catheter 110 is delivered to the predetermined position in the patient's body, the main catheter 110 is left in the patient's body for a period of time according to the actual condition of the patient. During the indwelling of the main catheter 110, the operator aspirates the intestinal contents to be discharged outside the body using the aspiration device.

Further, the embodiment of the present invention also provides a medical system, wherein the treatment device includes a guide wire (not shown in the drawings) and the medical catheter 100 as described above, the guide wire is inserted into the inner cavity of the tube body 111.

The main catheter 110 of the medical catheter 100 has a proximal end and a distal end opposite to each other, the medical catheter 100 further includes a manifold 120 and a balloon 130, the manifold 120 is disposed at a position of the main catheter 110 close to the proximal end, the balloon 130 is disposed at a position of the main catheter 110 close to the distal end, and the balloon 130 is communicated with the manifold 120. The treatment device further includes a balloon valve 200 connected to the manifold 120 for inflating the balloon 130, and a suction device (not shown) connected to the proximal end of the main catheter 110 for creating negative pressure to aspirate intestinal contents.

Optionally, the proximal end of the tube body 111 is opened with an air hole 114 (as shown in fig. 4) penetrating along the axial direction of the tube body 111, and the air hole 114 is used for communicating the balloon 130 and the manifold 120. In this embodiment, the tube body 111 is provided with one air hole 114, and actually, the number of the air holes 114 may be set according to the requirement, for example, two, three or more.

The medical catheter provided by the embodiment of the invention can be introduced into a patient body along a natural cavity of a human body, and the main catheter of the medical catheter comprises a catheter body and an inner lining layer arranged on the wall of an inner cavity of the catheter body, wherein the hardness of the inner lining layer is greater than that of the catheter body, so that the inner lining layer can provide supporting force for the catheter body, the main catheter cannot be bent to cause difficult pushing when the main catheter advances in the natural cavity of the human body, and the main catheter cannot be bent to cause blockage of the main catheter when the main catheter reaches a preset position in the patient body and is left in the body. Namely, the medical catheter has good pushing performance and controllability, and has better treatment effect compared with the existing catheter.

Although the present invention is disclosed above, it is not limited thereto. Various modifications and alterations of this invention may be made by those skilled in the art without departing from the spirit and scope of this invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.