JP2001293090A - Multi-purpose tube - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a multi-purpose tube capable of obtaining a clear MRI image or the like necessary for an operation such as a tumor extirpation. SOLUTION: A single or a plurality of side holes 3 are perforated at a tube wall near a distal end of the tube 1 made of a synthetic resin in which a cannonball-like closing member 2 is fixed to the distal end. Then, polyethylene glycol or a dimethylsilicone oil is poured directly or via a small member, a strip-like material or the like in the tube wall arriving from the vicinity of the holes 3 to a base end of the tube 1 and embedded. If an X-ray impermeable line is provided together at the tube wall, this can be also used in the case of a CT image or a simple X-ray photographed image.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a medical tube used by inserting it into a human body.

[0002]

2. Description of the Related Art For example, in brain tumor excision, especially glioma excision, the boundary between the tumor and normal brain tissue is unclear, so it is difficult to visually confirm the tumor and it is difficult to remove the entire tumor. It has been said that. In addition, when performing a brain tumor removal and intracranial hematoma removal surgery,
Deviation of the brain tissue occurs due to direct contact with the brain tissue, cerebrospinal fluid outflow over time, or the influence of atmospheric pressure. In such a case, the information obtained from the preoperative CT and MRI images may be slightly or slightly different, so that the operator loses sight of the target point, prolongs the operation time, and increases the burden on the patient. Becomes Furthermore, after surgery for an intracranial occupational lesion, it is common to perform a postoperative diagnosis by CT imaging as a confirmation of a treatment site, but in the case of glioma resection,
Blunt borders with normal tissue make it difficult to remove the whole and may result in residual tumors. So, C
In some cases, MRI imaging with a clearer resolution than T is selected. The problem in this case is that when inserting a ventricular catheter and a ventricular drainage tube into the surgical site, and indwelling for imaging, it is common that the catheter tube used for this is provided with an X-ray contrast line, The whole image of the used catheter tube is depicted in a CT image or a plain X-ray image, but is not depicted in an MRI image. Also, when a tube provided with a magnetic material such as metal is used, it is depicted in a CT image or a plain X-ray image,
In an MRI image, a strong magnetic field generates an artifact that impairs the sharpness of the depiction of a living tissue due to a strong magnetic field, which may hinder diagnosis by MRI.
Japanese Patent Application No. 10-108595 proposes that a non-magnetic material such as titanium or ceramic be buried in the catheter tube wall in order to avoid the drawbacks. The drawback is that it is difficult to distinguish between tumor and surrounding tissue. The invention also proposes embedding oils and fats in the tube wall of the catheter tube, but if this is the case, it is rendered white on the image, which is appropriate, but depending on the properties of the oils and fats,
The following problems arise. First, the use of highly volatile or leachable fats and oils is difficult because it is difficult to maintain the quality of a medical device, and it is necessary to add a structure and a process for maintaining the quality. Appropriate. Further, oils and fats having unstable properties and discoloration also lack image sharpness and are unsuitable.

[0003]

The present invention solves the above problem not only in a CT image and a plain X-ray image but also in an MRI image so that a clear image can be obtained. The purpose of the present invention is to propose a catheter tube that can be used for a medical device.

[0004]

[Technical Means for Solving the Problems] As a result of earnest studies to solve the above problems, as a result of MRI images, artifacts that hinder the sharpness of the depiction of living tissue are not generated, and they are not drawn on the images, It has been found that polyethylene glycol or dimethyl silicone oil is suitable as an oil or fat which is not drawn in black and does not have strong volatility or leachability or unstable properties.

[0005]

An embodiment of a multipurpose tube according to the present invention will be described with reference to the drawings. FIG. 1 is a side view showing the outline of the first embodiment. As described above, for example, it is necessary to insert the tube to the deep part of the brain tumor, and in order to facilitate the insertion, the tube (1) made of synthetic resin closed by fixing the cantilever-shaped closing member (2) to the tip portion. One or more side holes (3) are drilled in the tube wall near the distal end for drainage drainage or to enable injection of a drug solution, and a tube (1) is inserted from the vicinity of the side hole (3). ) Is injected into the tube wall leading to the base end with polyethylene glycol or dimethyl silicone oil at a desired interval,
Alternatively, a small member (4) in which polyethylene glycol or dimethyl silicone oil is sealed is embedded. The shape of the small member (4) can be appropriately selected, for example, such as a synthetic resin sphere or square tube.

[0006]

Second Embodiment FIG. 2 is a side view showing an outline of a second embodiment. One or more side holes (3) are formed in the tube wall near the distal end of the synthetic resin tube (1) closed by fixing the cantilever-shaped closing member (2) to the distal end,
A belt-like body (5) in which polyethylene glycol or dimethyl silicone oil is injected in a band shape into a desired portion of the tube wall from the vicinity of the side hole (3) to the base end of the tube (1), or polyethylene glycol or dimethyl silicone oil is sealed. Buried). The belt-like body (5) is, for example, an elongated bag made of synthetic resin, and its cross-sectional shape can be appropriately selected.

[0007]

Third Embodiment FIG. 3 is a side view showing an outline of a third embodiment, and FIG. 4 is a sectional view taken along line AA ′ of FIG. CT
And for use in simple X-ray photography, in the first embodiment,
An X-ray opaque line (6) is additionally provided on a tube wall from the distal end to the proximal end of the closing member (2) and / or the tube (1).

[0008]

Fourth Embodiment FIG. 5 is a side view showing an outline of a fourth embodiment, and FIG. 6 is a sectional view taken along the line BB ′ of FIG. CT
In addition, in order to use together with simple X-ray imaging, in the second embodiment,
As in the third embodiment, an X-ray opaque line (6) is additionally provided.

[0009]

According to the present invention, not only CT or X-ray radiography but also a clear white image can be obtained on an MRI image, so that the difficult medical treatment can be performed easily and easily. Can be.

[Brief description of the drawings]

FIG. 1 is a side view showing an outline of a first embodiment.

FIG. 2 is a side view showing an outline of a second embodiment.

FIG. 3 is a side view showing an outline of a third embodiment.

FIG. 4 is a sectional view taken along line A-A ′ of FIG. 3;

FIG. 5 is a side view showing an outline of a fourth embodiment.

FIG. 6 is a sectional view taken along line B-B ′ of FIG. 5;

[Explanation of symbols]

 1. Tube 2. Closing member 3. Side hole 4. Small member 5. Band-shaped body 6. X-ray opaque line

Claims (4)

[Claims] A single or a plurality of side holes (3) are bored in a tube wall near a distal end portion of a synthetic resin tube (1) closed by fixing a cantilever-shaped closing member (2) at the distal end portion. With
A polyethylene glycol or dimethyl silicone oil is injected into a tube wall extending from the vicinity of the side hole (3) to the base end of the tube (1) at a desired interval, or a small tube filled with polyethylene glycol or dimethyl silicone oil is filled therein. Multipurpose tube having a member (4) embedded therein 2. A single or a plurality of side holes (3) are formed in a tube wall near a distal end portion of a synthetic resin tube (1) closed by fixing a cantilever-shaped closing member (2) to the distal end portion. With
A band formed by injecting polyethylene glycol or dimethyl silicone oil into a band at a desired portion of the tube wall from the vicinity of the side hole (3) to the base end of the tube (1), or enclosing polyethylene glycol or dimethyl silicone oil ( Multipurpose tube characterized by embedding 5) 3. A single or a plurality of side holes (3) are formed in a tube wall near a distal end portion of a synthetic resin tube (1) closed by fixing a cantilever-shaped closing member (2) at the distal end portion. With
An X-ray opaque line (6) is provided on a tube wall extending from a distal end portion to a proximal end portion of the closing member (2) and / or the tube (1), and a proximal end of the tube (1) is provided near the side hole (3). A multi-purpose tube, wherein polyethylene glycol or dimethylsilicone oil is injected or a small member (4) enclosing polyethyleneglycol or dimethylsilicone oil is buried in a tube wall leading to a portion at a desired interval. 4. A single or a plurality of side holes (3) are formed in a tube wall near a distal end portion of a synthetic resin tube (1) closed by fixing a cantilever-shaped closing member (2) to the distal end portion. With
An X-ray opaque line (6) is provided on a tube wall extending from a distal end portion to a proximal end portion of the closing member (2) and / or the tube (1), and a proximal end of the tube (1) is provided near the side hole (3). Multi-purpose tube in which polyethylene glycol or dimethyl silicone oil is injected in a strip shape into a desired portion of a tube wall leading to a portion, or a strip (5) enclosing polyethylene glycol or dimethyl silicone oil is embedded therein