JPH048888Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] The present invention relates to a catheter inserted into a blood vessel of a subject used in an ultrasonic diagnostic device, and in particular,
The present invention relates to a catheter formed so that a probe is latched to a predetermined inner wall of the blood vessel to be diagnosed as necessary.

In ultrasonic diagnostic equipment, etc., a probe is positioned at a predetermined location on a subject to be diagnosed, and a diagnosis such as blood flow velocity measurement at the predetermined location is performed based on the signal detected by the probe. is formed.

When such a probe is used as a blood pressure monitor or a blood flow monitor, the probe is inserted into a blood vessel using a catheter to measure blood flow or blood pressure.

When such a catheter is inserted into or removed from a blood vessel, it is desired that the inner wall of the blood vessel is not damaged, and that the probe be positioned at a predetermined position on the inner wall during measurement.

[Conventional technology]

Conventionally, it was formed as shown in the perspective view of FIG.

A signal line 3 is embedded in a rod 2 made of a silicone rubber material, and a probe 5 and a conical member 6 are fixed to the tip.

Further, the conical member 6 is provided with a through hole 6A,
A connector 4 connected to a signal line 3 is provided at the rear end of the rod 2.

Therefore, since the conical member 6 at the tip of the rod 2 is inserted along the inner wall 1A of the blood vessel 1, the opening of the conical member 6 is formed somewhat larger than the inner diameter of the blood vessel 1. Pressed against the inner wall 1A,
In addition, blood flow passes through the through hole 6A,
The probe 5 is formed to be locked in a predetermined position.

Therefore, a signal from the probe 5 positioned at a predetermined location to be diagnosed can be obtained via the connector 4.

[Problem that the invention attempts to solve]

However, in such a configuration, when the rod 2 is inserted, the rod 2 is moved in the direction of the arrow A by the guide of the conical member 6, but when the rod 2 is inserted and removed, the conical member 6 is moved in the direction of the arrow B. The inner wall 1A is rubbed by the inner wall 1A, thereby damaging the inner wall 1A.Furthermore, since the through hole 6A provided in the conical member 6 has a limit, there is resistance to blood flow, causing turbulent flow, making it impossible to obtain actual measured values. It had

[Means for solving problems]

The above-mentioned problem is that there is a movable plate that slides in the insertion direction of the rod, one end is fixed to the movable plate, and the movable plate is slid to lock onto a predetermined inner wall of the blood vessel as necessary. This problem is solved by the catheter according to the present invention, in which a linear elastic member protruding in a curved shape is provided at the tip of the rod.

[Effect]

That is, a movable plate to be slid and a linear elastic member whose one end is fixed to the movable plate are provided at the tip of the rod, and if necessary, by sliding the movable plate, the elastic member is projected in a curved shape. It is designed to be

Thereby, the elastic member can be made to protrude when positioning at a predetermined location, and not protruded when being inserted into or removed from a blood vessel.

Therefore, damage to the inner wall of the blood vessel due to conventional insertion and removal is prevented, and blood pressure and blood flow can be accurately measured by eliminating turbulent blood flow.

〔Example〕

The present invention will be explained in detail below with reference to an embodiment shown in FIG. Figure A shows a side sectional view, Figure B shows a perspective view, and the same reference numerals indicate the same objects throughout the figures.

As shown in Fig. a, a probe 5 fixed to a holding member 13 was provided at the tip of a rod 10 made of a silicone rubber material, and a coating 17 was applied by silicone rubber coating or the like. A linear elastic member 16 has one end fixed to the rod 10 and the other end fixed to the movable plate 1.
A wire 11 that slides through the hollow part of the rod 10 is fixed to the movable plate 14.

In addition, the signal line 3 connected to the probe 5 is provided with a connector 4 at the end as shown in Figure b.
It is formed so that signals can be sent and received to and from.

With this configuration, by pulling the wire 11 in the direction of arrow C, the elastic member 16 is moved against the movable plate 1.
4 and protrudes in a curved manner as shown by the dotted line.

Therefore, when making a diagnosis, as shown in figure b,
First, the tip of the rod 10 is inserted into the blood vessel 1 in the direction of arrow A, and when it reaches a predetermined location, the wire 11 is pulled in the direction of arrow C to remove the elastic member 16 described above.
is protruded, and a predetermined diagnosis can be performed by positioning the distal end on the inner wall of the blood vessel 1. If you want to finish the diagnosis or move further, then wire 1
By loosening the tension on the elastic member 1, the elastic member 16 returns to its protrusion due to its own spring force, and is no longer locked to the inner wall, allowing the elastic member 16 to move freely.

In this way, the elastic member 16 can be prevented from protruding during insertion and removal, so that the inner wall of the blood vessel 1 will not be damaged. In addition, the elastic member 1
Compared to the conventional conical member 6, the protrusion 6 has reduced resistance to blood flow, can prevent turbulence, and can accurately measure blood pressure, blood flow, etc.

[Effect of idea]

As explained above, in the present invention, a probe is positioned at a predetermined location on the inner wall of a blood vessel by manipulating a wire.

As a result, it is possible to reduce damage to the inner wall and turbulence of blood flow, which is conventional, and to improve the reliability of diagnosis, which has a great practical effect.

[Brief explanation of the drawing]

Fig. 1 shows an embodiment of the present invention, Fig. a shows a side sectional view, Fig. b shows a perspective view, and Fig. 2 shows a conventional perspective view. In the figure, 1 is a blood vessel, 2 and 10 are rods, 3 is a signal line, 4 is a connector, 5 is a probe, 6 is a conical member, 11 is a wire, 13 is a holding member, 14 is a movable plate, and 16 is an elastic member. The member 17 indicates a coating.

Claims (1)

[Scope of utility model registration request] By fixing a probe to the tip of a rod made of silicone rubber material via a holding member, inserting the tip of the rod into a blood vessel of the subject, and locking the probe to a predetermined inner wall of the blood vessel. The catheter is for diagnosis, and includes a movable plate that is slid in the insertion direction of the rod, one end of which is fixed to the movable plate, and if necessary,
A catheter characterized in that a linear elastic member projecting in a curved manner is provided at the tip of the rod so as to be locked to the predetermined inner wall by sliding the movable plate.