JPH06296696A - Catheter - Google Patents

Abstract

PURPOSE:To enable the rapid and sure check of the insertion position of the catheter without making X-ray photographing of the breast by providing the catheter to be used for injection of IVH (intro-central-venous nutrition method), etc., with a wire having a magnetic material at its front end. CONSTITUTION:The wire 2 provided with the magnetic material (or metal) at its front end is inserted into the catheter 1 to be inserted into an arm (elbow vein), a subclavian part (subclavian vein), etc., and the front end 2c thereof is projected from the front end of the catheter 1 in the case of injection of a high-calorie transfusion liquid into a human body. The magnetic material at the front end 2c of the wire is detected by a magnetic sensor 3 to check the position at the front end of the catheter 1. Namely, the front end of the magnetic sensor 3 is brought near the supervior vena cava after the insertion of the catheter 1 into the blood vessel and the magnetism at the front end 2c is detected. The insertion state of the catheter 1 is checked by visually observing the large swing of the pointer of the magnetic sensor 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a catheter used for medical purposes.

[0002]

2. Description of the Related Art Conventionally, a catheter for IVH (transvenous parenteral nutrition) injection is inserted from the arm (elbow vein), the subclavian (subclavian vein), or the foot (subfemoral vein) to make sure the catheter. In order to confirm whether or not the catheter has reached the target position in the blood vessel, the catheter was inserted into the blood vessel and then the chest X-ray was taken to confirm the insertion position of the catheter. Further, there is a catheter having a magnetized end portion such as the device of the invention described in Utility Model Application Publication No. 55-125341.

However, in the method of confirming the insertion position of the catheter by chest X-ray photography after inserting the catheter into the blood vessel, there is a risk of radiation damage due to the late effect due to exposure to X-rays. there were. Category
In the method of confirming the insertion position of the catheter from outside the human body by applying magnetism to the tip like a tell, the tip of the catheter is magnetized, so in the state where the catheter is inserted. When the MRI examination is carried out, there is a risk that the tip of the catheter will be shaken and the blood vessel will be damaged because the tip of the catheter has magnetism, and when the MRI examination is carried out in the inserted state, the image becomes unclear because of the magnetism. There was a drawback that it could become.

[0004]

SUMMARY OF THE INVENTION According to the present invention, the insertion position of the catheter in the human body can be confirmed quickly and reliably without the need for chest X-ray photography, and the catheter is removed after only the wire is pulled out. An object of the present invention is to provide a catheter that allows MRI examination at the same time when the teller is inserted.

[0005]

DISCLOSURE OF THE INVENTION The present invention comprises a catheter and a wire having a magnetic substance or metal at its tip, and a catheter and a magnetic substance or metal at its tip. And a metal sensor for detecting the magnetism of the magnetic material, and the insertion position can be detected.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings. The catheter capable of detecting the insertion position according to the present invention comprises a catheter 1, a wire-2 having a magnetic substance or metal at its tip, and a magnetic sensor-3 or a metal sensor-3.
Is a plan view of the catheter, reference numeral 1a is an infusion inlet,
Reference numeral 1b is a base portion, and 1c is an insertion portion to be inserted into a blood vessel.

FIG. 2 is a plan view of a wire having a magnetic substance or metal at its tip. This wire-2 has an insertion portion 2b for inserting into the catheter 1 shown in FIG. A magnetic material / metal 2c is attached to the tip of the insertion portion 2b.

FIG. 3 is a front view of a magnetic sensor or a metal sensor for detecting the magnetic substance 2c or the metal 2c, which is inserted into the catheter 1 to detect and confirm the insertion position into the body. belongs to. The magnetic sensor-3 or the metal sensor-3 has a detection unit 3a at the tip, a scale 3b, pointers 3c and 3d at the center, and a switch 3e for switching.
There is. As the magnetic sensor-3 and the metal sensor-3 used in the present invention, known ones may be used.

FIG. 4 is a use state diagram showing the insertion position-detectable catheter according to the present invention, and FIG. 5 is a view showing a direction in which the catheter 1 is inserted into a blood vessel of a human body. is there. As shown in FIG. 5, when injecting a high calorie infusion solution into the human body 5, first, an injection needle (not shown) is used to inject the vein into the groin (not shown) of the arm 5a or foot. The central vein catheter 1 is inserted into the blood vessel from the punctured area, and the catheter 1c is inserted into the blood vessel from the arm 5a (elbow vein) in a groping state to approach the heart 4. However, catheter 1 was inserted into the superior vena cava,
It suffices if it is in the state of Tell 1e, but sometimes as shown in FIG. 5, the catheter 1 is placed in the direction of the neck 5b (particularly the internal jugular vein).
f may be inserted, and such a neck 5b
There was a risk of neck cell pain and swelling due to incorrect insertion into the internal jugular vein, and damage to brain cells.

As shown in FIG. 5, whether or not the catheter 1 has been inserted into the superior vena cava is conventionally confirmed by a chest X-ray image after completion of the insertion and the catheter 1e in the four directions of the heart. Is inserted into the human body 5 or the internal jugular vein (cateter 1f) of the neck 5b is confirmed, and after confirming that it is definitely inserted in the direction of the heart 4, a high calorie infusion solution is introduced into the human body 5. Intravenous drip infusion. However, although it has been conventionally said that X-ray photography has an adverse effect on the human body, there is no alternative to the X-ray photography method for confirming the position of the catheter 1, so the method by X-ray photography is used. Was taken.

FIG. 4 is a diagram showing a method for confirming the insertion position of the catheter 1 according to the present invention, in which the tip is inserted into the hollow inside the catheter 1 inserted into the blood vessel from the arm 5a (elbow vein) or the like. Wire-2 with magnetic body 2c or metal 2c attached
After inserting, the magnetic sensor 3 for sensing the magnetic body 2c or the metal 2c, or the sensing unit 3a of the metal sensor-3, the switch 3e of the magnetic sensor-3 or the metal sensor-3 is turned on, and The tip of the sensor 3 or the metal sensor 3 is brought close to the superior vena cava, and the tip 1 of the catheter 1 is
magnetic substance 2c or metal 2 of wire-2 protruding from d
When the magnetism of c is detected, the pointer 3c shown in FIG. 3 largely swings to the right, and if it swings to the position of the pointer 3d, the catheter 1 can be inserted as intended. However, as shown in FIG. 5, the catheter 1f is placed at the position of the neck 5b.
In the case where the catheter 1 is inserted in the catheter, the pointer 3c does not shake even when the sensing portion 3a of the magnetic sensor-3 or the metal sensor-3 is brought close to the superior vena cava 4, and the catheter 1 is at a desired position. You can see that it is not inserted in.

[0012]

As described above, since it comprises a catheter, a wire containing a magnetic substance or metal, and a magnetic sensor or a metal sensor, the following effects are obtained. First, if the sensor is accurately inserted in the direction of the superior vena cava and the sensor is inserted in close proximity, the insertion direction of the catheter can be confirmed quickly. There is. Secondly, there is no error in inserting the tip of the catheter into the blood vessel in the cervical direction, and there is an effect that the patient is not complicated. Thirdly, since the wire having a magnetic material or metal is pulled out from the catheter, it does not hinder other examinations (MRI examinations) and has an effect that the MRI examination can be performed easily. Fourthly, since there is no exposure to X-rays, there is no fear of radiation damage, which is extremely beneficial to the human body.

[Brief description of drawings]

FIG. 1 is a plan view of a catheter constituting an insertion position detectable catheter according to the present invention.

FIG. 2 is a plan view of a wire having a magnetic material or a metal that constitutes an insertion position detectable catheter according to the present invention.

FIG. 3 is a front view of a magnetic sensor or a metal sensor forming the catheter capable of detecting the insertion position according to the present invention.

FIG. 4 is a usage state diagram showing a usage state of the present invention.

FIG. 5 is a view showing a state in which a catheter is inserted into a human body.

[Explanation of symbols]

 1 Caterel 1a Insertion port 1b Base part 1c Insertion part 1d Tip 2 Wire-2a Handle 2b Insertion part 2c Magnetic substance / metal 3 Magnetic sensor / metal sensor-3a Detection part 3b Scale 3c Pointer 3d Pointer 3e switch 4 Heart 4a Heart Inner 5 Human body 5a Arm 5b Neck

Claims (4)

[Claims] 1. A catheter comprising a catheter and a wire having a magnetic material at the tip thereof. 2. A catheter according to claim 1, wherein the tip of the wire is made of metal. 3. A catheter comprising a catheter, a wire having a magnetic body at the tip thereof, and a magnetic sensor for detecting the magnetism of the magnetic body so that the insertion position can be detected. 4. The tip of the wire is made of metal, and
The catheter according to claim 3, wherein the magnetic sensor is a metal sensor.