JP3090225B2 - Medical wire - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a medical wire used in a catheter system or a blood circulation tube.

[0002]

2. Description of the Related Art FIG. 3 is a view showing a basic structure of a catheter system. In the figure, reference numeral 1 denotes a catheter, 2 denotes a guide wire, 3 denotes a sheath, 4 denotes a Y connector, and 5 denotes a torquer.

[0003] Catheter embolization for treating liver cancer will be described as an example. A branch of the hepatic artery feeding the liver cancer is searched by angiography, the catheter is advanced to the branch of the hepatic artery, and an embolizing substance is injected from the tip to embolize the periphery of the vascular region, and ischemia ischemic. By setting the state, treatment for liver cancer is performed. A catheter system as shown in FIG. 3 is used when performing angiography as described above, and a catheter 1 for imaging is used.
Is advanced into the target blood vessel so as to cover the guide wire 2 inserted through the sheath in advance.

[0004]

The problem to be solved is that the conventional medical wire uses, for example, a guide wire having an outer diameter of about 0.8 mmφ and a flexible tip, It has no function other than guiding the catheter. The present invention has been made in order to solve such problems, and a medical wire that can be attached to a catheter or a tube or the like and that can heat a liquid that passes through the catheter or the tube without impairing conventional functions. The purpose is to get.

[0005]

According to the medical wire of the present invention, a whole wire needle having a temperature sensor attached to a distal end portion is covered with a coating material, and a straight line is formed between the wire needle and the coating material in the longitudinal direction. It is characterized in that a fixed length heating element is inserted.

[0006]

In the present invention, by inserting a heating element of a fixed length in a straight line in the longitudinal direction, a liquid passing through the catheter or tube when used in a catheter or tube is used at the tip of the catheter. It is possible to heat to a temperature.

[0007]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing a configuration in a case where the medical wire according to the present embodiment is used for a catheter system for treating liver cancer and the like. In the drawing, the same reference numerals as those in FIG. 3 denote the same or corresponding parts. Reference numeral 10 denotes an extension tube connecting between the Y connector 4 and the catheter 1, 11 denotes a heating power supply, 12 denotes a temperature display device, 13 denotes an infusion pump with a pressure sensor, and 20 denotes a medical wire in the present embodiment.

FIG. 2A is a partial side view showing the configuration of the medical wire 20 shown in FIG. 1, and FIG. 2B is a sectional view.
In the figure, 21 is a wire needle, 22 is a covering material, 23 is a heating element, 24 is a temperature sensor, 25 is a temperature sensor 24
2 shows connection lines for connecting the temperature display device 12 to the temperature display device 12.

Next, the operation will be described. As shown in FIG. 2, the medical wire in the present embodiment covers the entire wire needle 21 having a temperature sensor 24 attached to the distal end thereof with a covering material 22, and extends between the wire needle 21 and the covering material 22 in the longitudinal direction. The heating element 23 having a certain length is inserted in a straight line, and for example, as shown in FIG.
When the liquid is passed through the catheter 1 and sent into the human body, the heating element 23 is turned on to generate heat in the heating element 23, and the liquid gradually increases while the liquid flows through the catheter 1. It is heated and reaches the target temperature at the tip of the catheter 1. In addition, temperature control is performed by the temperature sensor 24.
The temperature is always detected and the heating power supply 11 is adjusted according to the display temperature displayed on the temperature display device 12.

As described above, in the present embodiment, since the liquid can be gradually heated to a target temperature while the liquid flows through the catheter 1 inserted into the body, the catheter inserted into the body can be heated. There is no need to consider a state in which the liquid is cooled due to heat being deprived in the inside of the device 1, and the patient may be distressed by injecting a liquid having a temperature higher than the target temperature into the body in advance as in the related art. The situation can be prevented.

If the catheter system using a medical wire according to the present embodiment is used for treating liver cancer or obstructive jaundice due to cancer, for example, water or an anticancer agent is administered at about 45 ° C. at the tip of the catheter 1. By injecting into the human body while heating as much as possible, compared to the conventional method of heating the affected part from outside the body using a microwave heating device or the like, it is possible to easily perform local hyperthermia.

For example, when performing an emergency mass blood transfusion, the blood is refrigerated using a warmer coil (not shown).
Also in this case, the blood is cooled while the blood flows through the extension tube connecting the human body and the warmer coil,
This was a problem, but by attaching the medical wire in this embodiment to the extension tube connected to the indwelling needle, it was possible to heat the blood to a temperature close to the body temperature without unnecessarily heating the blood. It is easy to solve these problems.

[0013]

As described above, the medical wire of the present invention can be attached to a catheter, a tube, or the like and gradually heats a liquid that passes through the catheter or the tube without impairing the conventional function. There are advantages that can be.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration example when a medical wire according to the present invention is used for a catheter system.

FIG. 2 is a view showing a medical wire according to the present invention.

FIG. 3 is a diagram showing a basic configuration example of a catheter system.

[Explanation of symbols]

 Reference Signs List 11 heating power supply 12 temperature display device 20 medical wire 22 coating material 23 heating element 24 temperature sensor

Claims (1)

(57) [Claims] The present invention is characterized in that the entire wire needle having a temperature sensor attached to its tip is covered with a covering material, and a heating element of a fixed length is linearly inserted in the longitudinal direction between the wire needle and the covering material. Medical wire.