JPH0548953U - Medical catheter - Google Patents

Abstract

(57) [Summary] [Purpose] To be able to check the position of the catheter inserted in the body and obtain length information of each part. [Structure] Marks 12a to 12e, which are scales of length, are formed on a catheter 10 by using a radiocontrast material such as a contrast agent or metal so that the scales of length can be displayed in an X-ray image.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a medical catheter, particularly a catheter used for fluoroscopy and radiography.

[0002]

[Prior Art]

 2. Description of the Related Art Conventionally, a medical catheter has been well known which is inserted into a blood vessel or a thin tube of various organs to inject a liquid such as a drug solution or to take out the contents, and this medical catheter can be used under fluoroscopy or radiography. Often used. For example, in a diagnosis while performing fluoroscopy, a catheter is inserted into a predetermined site such as a blood vessel, heart, lung, or kidney while confirming a fluoroscopy image. In some cases, an X-ray contrast agent is mixed with the material of the outer cylinder of the catheter so that the position of the catheter can be easily confirmed, and is displayed on the X-ray fluoroscopic image.

[0003]

[Problems to be solved by the device]

 However, with such medical catheters, although it was possible to confirm the presence of the catheter itself, in which the contrast agent was mixed, with an X-ray image, it was necessary to accurately grasp the length and position of the catheter in the middle. There was a problem that I could not. In other words, in X-ray radiography, not only is the length of the catheter inserted into the body confirmed from the tip, but the length of a certain site where the catheter is inserted, the distance between any two points, and the curve If you can confirm the length, you can obtain useful information for diagnosis. In the past, some catheters were visually marked with a mark that serves as a guide for the length. In this case, the insertion length (reference point) should be checked by checking the mark at the time of insertion into the body (base point). You can know the total length). However, once the catheter was inserted into the body, the mark could not be identified and the catheter could not be used as a scale.

The present invention has been made to solve the above problems, and its purpose is to confirm the mid-position of a catheter inserted into the body on an X-ray image and to check the length of each part. The purpose of the present invention is to provide a medical catheter that can obtain information on the quality.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, the medical catheter according to the present invention is characterized in that a mark serving as a scale of length is formed by using a radiocontrast substance. This radiographic substance contains, in addition to commonly used contrast agents, X-ray absorbing metals and the like.

[0006]

[Action]

 According to the above-mentioned structure, for example, the scale marks indicating the length are provided on the outer circumference of the catheter at regular intervals of several centimeters. This mark is applied, for example, by barium sulfate coating or X-ray absorption. It is formed by embedding a high metal. On the other hand, conversely, it is also possible to form only the graduation portion with a substance having a low X-ray absorption, or to form only the graduation portion so that the contrast agent is not mixed. Therefore, the mark of the catheter inserted into the body will be clearly displayed on the monitor of the X-ray imaging system, and it will be possible to obtain information on the length and position of each part by this mark. Note that it is effective to set the scale on the radiographic image so that it can be viewed at the same time so that the visual and radiographic images can correspond to each other.

[0007]

【Example】

 An embodiment of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows the configuration of a medical catheter according to an embodiment. A catheter 10 is made of polyethylene, polyvinyl chloride or the like, and is formed in a hollow pipe shape. Marks 12a to 12e are attached to the outer periphery of the hollow catheter 10 as shown in the figure. In the case of FIG. 1, a linear mark 12a having a slightly wider width is attached to the tip to show the tip. The mark 12a is followed by a one-line mark 12b, a two-line mark 12c, a three-line mark 12d, a four-line mark 12e, ... In the embodiment, the marks 12a to 12e are provided at equal intervals of several centimeters, for example, every 3 centimeters and 5 centimeters, but the intervals are made of various types so that they can be selected depending on the target site. can do. The marks 12a to 12e may be attached to the entire area of the outer circumference 360 degrees of the catheter 10, or may be attached to an area of about 180 degrees or 120 degrees.

Further, the marks 12a to 12e are formed by using an X-ray contrast substance, and barium sulfate (BaSO ₄ ) is applied in the embodiment. This barium sulphate is diluted and is generally used as a contrast agent, but in the embodiment, a high concentration is applied so that it can be distinguished from the contrast agent injected for angiography. ing. Note that the mark 12 is not limited to barium sulfate, and various other contrast agents can be used. Then, after applying the barium sulfate, a thin coating may be formed so that the barium sulfate does not dissolve.

Further, although the marks 12a to 12e are not used as the contrast agent, they may be formed of a metal material which is a kind of X-ray contrast substance. For example, the marks 12a to 12e can be formed by embedding lead, iron, or the like having a high X-ray absorption rate or a powder thereof in a hollow catheter 10 wall.

FIG. 2 shows a state where the above catheter is actually applied, and an organ 16 such as a heart is projected on the X-ray monitor 14 by fluoroscopy. Then, the catheter 10 is inserted into the body from a predetermined location and introduced into the organ 16, and if the syringe 18 is pushed and operated at an arbitrary position, the contrast agent 20 will be injected from the tip of the catheter 10 into the organ 16. It will be injected into the inside and it will be possible to observe and photograph by contrast method. At this time, the marks 12a to 12e provided on the catheter 10 also absorb the X-rays, so that the marks 12a to 12e on the catheter 10 are clearly displayed on the X-ray monitor 14. Therefore, the marks 12a to 12e provide information on the midpoint of the catheter 10 and information on the length of the inside of the organ 16.

FIG. 3 shows another example of the mark according to the present invention. In the catheter 10 shown in FIG. 3A, rod-shaped marks 22 are simply provided at equal intervals of several centimeters. It is a scam. In this case, a number indicating the length may be added as a mark near the mark 22. In addition, the catheter 10 shown in FIG. 1B has marks 24a to 24d in which the number of lines increases at equal intervals as shown in FIG. 1, and small marks are formed between the marks 24a to 24d as shown in the figure. The auxiliary mark 25 of the interval is formed. With the marks 22, 24, 25 having such a configuration, the same effect as described above can be obtained.

[0012]

[Effect of the device]

 As described above, according to the present invention, since the mark serving as the scale of the length is attached by using the radiocontrast material, the mark on the catheter can be confirmed with the catheter inserted in the body. Therefore, it is possible to obtain information such as the position information in the middle of the catheter, the length of any part, the distance between any two points, and the length of the curved part, which is useful for image diagnosis. Becomes

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of a medical catheter according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a state in which the catheter of the example is applied to fluoroscopic imaging.

FIG. 3 is a diagram showing another configuration of marks on the catheter.

[Explanation of symbols]

 10 catheters 12a to 12e, 22, 24a to 24d, 25 marks 16 organs 18 syringes

Claims (1)

[Scope of utility model registration request] 1. A medical catheter which is inserted into a blood vessel or a thin tube of various organs for diagnosis and treatment, wherein a plurality of markers identifiable on a radiographic image are formed using a radiocontrast substance.