JPH11128180A - Catheter equipped with pressure sensor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a catheter equipped with a pressure sensor, allowing a zero offset operation to be performed easily. SOLUTION: In this catheter CA equipped with a pressure sensor, a resistance box 4 is connected to one branch line 3A connected to the rear of a branch part 3, and a connector 5 is connected to the resistance box 4 via a wire 6. A lure connector 11 is connected to the other branch line 3B, and a pressure sensor 1S is placed within a pressure sensor part 1. The one branch line 3C in the branch part 3 is filled with an air-shutting off filler, and a filter is mounted in the other branch pipe 3D. A lead wire 9 connected to the rear of the pressure sensor 1S is connected to the resistance box 4 through a catheter main body 2, the branch part 3, the branch pipe 3C, and the branch line 3A.

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 catheter with a pressure sensor having an atmospheric pressure adjusting function.

[0002]

2. Description of the Related Art Various types of catheters equipped with a pressure sensor with a tip which are currently used cannot reset the zero offset in a state where pressure is constantly applied after the catheter is once inserted into a blood vessel or the like. . However, since the externally installed pressure sensor can be easily opened on the atmospheric pressure side by a switching cock or the like, the zero offset can be reset. The present inventors have conducted intensive studies and, as a result, have succeeded in developing a catheter with a pressure sensor devised with a function capable of surely setting a zero offset even when a pressure is constantly applied.

[0003]

[Means for Solving the Problems]

[1] In the present invention, the pressure sensor unit 1 is mounted in front of the catheter body 2, the branch unit 3 is mounted behind the catheter body 2, and one branch line 3A connected behind the branch unit 3 has a resistance. Box 4 is connected, a connector 5 is connected to the resistance box 4 via an electric wire 6, and the other branch line 3 is connected.
B, a luer connector 11 is connected to the pressure sensor 1
A pressure sensor 1S is disposed therein, an air-blocking filler 8 is loaded in one branch pipe 3C in the branch section 3, and a filter 13 is loaded in the other branch pipe 3D, and connected behind the pressure sensor 1S. Catheter C with a pressure sensor in which the connected lead wire 9 is connected to the resistance box 4 via the catheter body 2, the branch portion 3, the branch pipe 3C, and the branch line 3A.
Provide A. [2] In the present invention, the pressure sensor section 1 is mounted in front of the catheter body 2, the branch section 3 is mounted behind the catheter body 2, and one branch line 3A connected behind the branch section 3 has a resistance. Box 4 is connected, a connector 5 is connected to the resistance box 4 via an electric wire 6, and the other branch line 3 is connected.
B, a luer connector 11 is connected to the pressure sensor 1
A pressure sensor 1S is disposed in the inside, the rear part 2B of the catheter main body 2 is protruded into the resistance box 4, and the luer connector 11 is protruded from the side of the rear part 2B of the catheter main body 2, so that the luer connector 11 is The rear is projected out of the resistance box 4, the air-blocking filler 8 is loaded into the rear end 2 E of the rear part 2 B of the catheter body 2, and the luer connector 11 is inserted.
A filter 13 is loaded therein, and a lead wire 9 connected to the rear of the pressure sensor 1S is provided to the catheter body 2, and a catheter CA2 with a pressure sensor connected to the resistance box 4 via the rear end 2E. [3] In the present invention, instead of connecting the luer connector 11 to the branch line 3B according to [1], a three-way cock 7 is arranged in the middle of the branch line 3B, and the balloon 1 is provided behind the branch line 3B.
4 is provided with a pressure sensor-equipped catheter CA3. [4] In the present invention, the pressure sensor unit 1A is mounted in front of the catheter main body 2A, and the branch unit 3 is mounted in the rear of the catheter main body 2A.
E, the inside of the catheter body 2A is provided with a partition wall W to divide it into an atmospheric pressure introducing lumen 17 and a lead wire lumen 18, and a resistance is applied to one of the branch lines 3A connected to the rear of the branch section 3E. Box 4, a connector 5 is connected to the resistance box 4 via an electric wire 6, a luer connector 11 is connected to the other branch line 3B, and a pressure sensor 1S is disposed in the pressure sensor section 1A. The lead wire 9 connected to the rear of the pressure sensor 1S provides a catheter CA4 with a pressure sensor connected to the resistance box 4 via the lead wire lumen 18, the branch portion 3E, and the branch line 3A.

[0004]

FIG. 1 is a schematic diagram showing a catheter CA with a pressure sensor according to the present invention.
A is a pressure sensor unit 1 mounted in front of a catheter body 2 made of a material such as polyurethane, and a catheter body 2
, A resistor box 4, a connector 5, and a luer connector 11 disposed behind the branch portion 3. The resistance box 4 is a branch line 3A
The connector 5 is connected to the rear of the resistance box 4 via an electric wire 6, and the luer connector 11 is connected to the rear of the branch 3 via a branch line 3B.

A pressure sensor 1S is provided inside the pressure sensor unit 1.
As shown in FIG. 2, inside the branch portion 3, one of the branch tubes 3C of the branch portion 3 is loaded with the air blocking filler 8, and the other branch tube 3D is loaded with the filter 13. . A lead wire 9 connected to the rear of the pressure sensor 1S is connected to a printed circuit board 10 arranged in the resistance box 4 via the catheter body 2, the branch 3, the branch pipe 3C, and the branch line 3A.

FIG. 3 shows a catheter CA with a pressure sensor shown in FIG.
CA2 with pressure sensor showing another embodiment of the invention
(FIG. 4 is a partially enlarged cross-sectional view near the resistance box 4 in FIG. 3). The catheter CA2 with a pressure sensor has a rear portion 2B of the catheter body 2 protruding into a resistance box 4 instead of providing the branch portion 3 behind the catheter body 2 in the catheter CA with a pressure sensor of FIG. A luer connector 11 is provided on the side of the rear portion 2B.
To project the rear of the luer connector 11 out of the resistance box 4, load the air blocking filler 8 into the rear end 2 E of the rear portion 2 B of the catheter body 2, and place the filter 13 in the luer connector 11. Load, pressure sensor 1S
Is connected to a printed circuit board 10 disposed in the resistance box 4 via the catheter body 2 and the rear end 2E.

In the catheter CA with a pressure sensor shown in FIG. 1, a luer connector 11 is connected to the rear end of the branch line 3B. However, instead of the luer connector 11, a branch line like a catheter CA3 with a pressure sensor shown in FIG. The three-way cock 7 may be arranged in the middle of 3B, and the balloon 14 may be connected behind the branch line 3B.

The catheter C with a pressure sensor shown in FIG. 1 (FIG. 2)
As shown in A, the branch part 3 is divided into a branch pipe 3C and a branch pipe 3D, and a branch line 3A which is an electric line is connected to the branch pipe 3C.
A branch line 3B, which is an atmospheric pressure side line, is connected to the branch pipe 3D, and an air-blocking filler 8 is loaded into the branch pipe 3C so that the air in the branch part 3 and the branch line 3B is connected to the branch line 3A and the resistance box 4. It is shut off to prevent communication. By forming in this manner, zero offset under an applied pressure becomes possible.

The catheter C with a pressure sensor shown in FIG. 3 (FIG. 4)
A2 also blocks the air flowing from the catheter body 2 and the luer connector 11 from the air-blocking filler 8 loaded in the rear end 2E of the catheter body, so that the air can flow into the resistance box 4. And zero offset under applied pressure is possible. The catheter CA2 with a pressure sensor has a distal end of a luer connector 11 protruding from a rear portion 2B of the catheter main body corresponding to the branch pipe 3C and the branch pipe 3D of the catheter CA with a pressure sensor and a side portion of the rear part 2B of the catheter main body. Since it is arranged in the box 4, a more compact shape can be obtained. A syringe is mounted on the luer connector 11 as an air amount adjusting member 12, and the syringe is provided with an air inlet at the center of the cylindrical body and is connected to the luer connector 11, so that fine adjustment of the air inlet amount can be performed. It will be easier.

Next, an example of a method of using the catheter CA with a pressure sensor shown in FIG. 1 will be described with reference to FIGS. Pressure sensor part 1 of catheter CA with pressure sensor
Is inserted into a blood vessel of a patient, and a syringe as an air amount adjusting member 12 is connected to a luer connector 11 as shown in FIG. In the pressure sensor 1S, the diaphragm 1SD is deformed into a concave shape as shown in FIG. 7 in an applied pressure state when the pressure sensor unit 1 is inserted into a blood vessel of a patient. The atmospheric pressure is adjusted while pushing the piston of the air amount adjusting member 12 toward the luer connector 11 so that the concave deformation of the diaphragm 1SD is restored to the original flat shape as shown in FIG. When the display on the monitor (not shown) connected to the connector 5 shows zero, the piston is stopped and the monitor is offset to zero. The zero display of the monitor is a zero display in which the catheter CA with the pressure sensor is zero-offset under the atmospheric pressure.

When the piston is withdrawn from the air amount adjusting member 12 and the luer connector 11 is communicated with the atmospheric pressure, the atmospheric pressure is transmitted to the pressure sensor 1S via the branch line 3B, the branch portion 3, and the catheter body 2, and FIG. As a result, the diaphragm 1SD is again deformed into a concave shape, and the applied pressure value is displayed on the monitor. The air amount adjusting member 12 can use a dial type air adjusting valve instead of the syringe. Alternatively, in the case of a catheter CA3 with a pressure sensor in which the three-way cock 7 is arranged in the middle of the branch line 3B instead of providing the luer connector 11 and the balloon 14 is connected behind the branch line 3B as shown in FIG. After the balloon 14 is lightly pressed with a finger while the air passage communicates with the balloon 14 and the zero display of the monitor is confirmed, the applied pressure value is displayed on the monitor by communicating the air passage of the three-way cock 7 with the atmosphere.

FIG. 10 is a schematic view showing another embodiment of the catheter CA4 with a pressure sensor according to the present invention (FIG. 11 is FIG.
It is a partial enlarged view near the pressure sensor part). The catheter CA4 with a pressure sensor is a catheter body 2A corresponding to the catheter body 2 of the catheter CA with a pressure sensor in FIG.
Is provided with a partition wall W to partition into a lumen 17 for introducing atmospheric pressure and a lumen 18 for a lead wire.
A luer connector 11C for infusion is attached to the back of the catheter via a branch 3E and a branch line 3F, and a pressure sensor 1A is attached to the front of the catheter body 2A. Pressure sensor 1
A is configured by disposing a pedestal 21 in a hard cover 15 made of metal or the like, disposing a ceramic substrate 20 on the pedestal 21, and further disposing a pressure sensor 1S thereon. Is connected to a lead wire 9 via a bonding wire 22. A pressure receiving portion filler 16 made of silicone, fluororesin, or the like is loaded on the top surface of the pressure sensor 1S. An elastic member 23 made of silicone, fluorine resin, or the like is mounted in front of the pressure sensor section 1A. In the figure, reference numeral 26 denotes an air introduction hole. A hole 24 for infusion is formed on the side of the catheter body 2A,
The infusion hole 24 communicates with the infusion lumen 25.
Other components are substantially a catheter C with a pressure sensor.
Since it is the same as A, detailed description is omitted. The principle of detecting the pressure of the pressure sensor 1S of the catheter CA4 with a pressure sensor employs a gauge pressure system, and is configured to detect the atmospheric pressure applied to the pressure receiving surface of the pressure sensor 1S.
The catheter CA4 with a pressure sensor also has an air amount adjusting member 1
2, the applied pressure can be displayed on a monitor connected to the connector 5 by making the luer connector 11 communicate with the atmospheric pressure by performing zero offset similarly to the catheter CA with a pressure sensor.

The catheter CA with a pressure sensor shown in FIG.
The detailed cross-sectional structure of the pressure sensor unit 1 (same for CA2 and CA3) is different only in that the partition wall W is not provided in the cross section of the pressure sensor unit 1A of the pressure sensor catheter CA4 (see FIG. 11). Since it is substantially the same as the pressure sensor unit 1A, a detailed description will be omitted.

[0014]

According to the catheter CA with a pressure sensor of the present invention, the luer connector 11 is attached to the branch portion 3 via the branch line 3B, so that the zero offset operation can be easily performed by a syringe or the like. Since the catheter CA2 with the pressure sensor has the rear portion 2B of the catheter body 2 and the luer connector 11 protrudingly provided in the resistance box 4, the shape is more compact than that of the catheter CA with the pressure sensor, and the handling is easy. The catheters with pressure sensors CA, CA2, and CA3 can be manufactured in various lots having different air capacities by adopting a syringe, a dial-type air control valve or a combination of a three-way cock and a balloon as the air quantity adjusting member 12, thereby reducing the air capacity. By performing fine adjustment of the above, the zero offset operation can be easily performed. The catheters CA, CA2, and CA3 with pressure sensors are filled with an air-blocking filler 8 in the branch pipe 3C or the rear part 2B of the catheter body so that the atmospheric pressure does not communicate with the inside of the resistance box 4 and the branch pipe 3D or the luer connector. 11
By loading the filter 13 therein, only air is introduced into the catheter main body 2 without foreign matter in the atmosphere being mixed into the catheter main body 2, so that a zero offset under an applied pressure can be easily performed. In the catheter CA4 with a pressure sensor, since the lumen 17 for introducing atmospheric pressure and the lumen 18 for the lead wire are partitioned via the partition wall W, the air-blocking filler 8 is provided in the branch portion 3E like the catheter CA with the pressure sensor. Since there is no need to provide them, manufacturing is easy and cost can be reduced. Further, since no air enters the resistance box 4, the operability of zero offset can be further improved.

[Brief description of the drawings]

FIG. 1 is a schematic view of a catheter with a pressure sensor of the present invention.

FIG. 2 is a partially enlarged sectional view of the vicinity of a branch portion in FIG. 1;

FIG. 3 is a schematic view showing another embodiment of the catheter with a pressure sensor.

FIG. 4 is a partially enlarged view of the vicinity of the resistance box in FIG. 3;

FIG. 5 is a schematic view showing another embodiment of the catheter with a pressure sensor.

FIG. 6 is a use state diagram of FIG. 1;

FIG. 7 is a change diagram of a use state of the pressure sensor of the present invention.

FIG. 8 is a change diagram of a use state of the pressure sensor of the present invention.

FIG. 9 is a diagram showing a change in a use state of the pressure sensor of the present invention.

FIG. 10 is a schematic view showing another embodiment of the pressure sensor catheter.

FIG. 11 is a partially enlarged view of the vicinity of a pressure sensor unit in FIG. 10;

FIG. 12 is a sectional view taken along line AA of FIG. 10;

FIG. 13 is an enlarged sectional view of the vicinity of a branch portion in FIG. 10;

[Explanation of symbols]

CA, CA2, CA3, CA4 Catheter with pressure sensor 1, 1A Pressure sensor section 1S Pressure sensor 1SD Diaphragm of pressure sensor 2, 2A Catheter body 2B Back part of catheter body 2E Back end of catheter body 3, 3E Branch part 3A, 3B, 3F Branch line 3C, 3D branch pipe 4 Resistance box 5 Connector 6 Electric wire 7 Three-way cock 8 Air blocking filler 9 Lead wire 10 Printed circuit board 11 Luer connector 11C Infusion luer connector 12 Air flow adjusting member 13 Filter 14 Balloon 15 Hard Cover 16 Pressure receiving portion filling member 17 Atmospheric pressure introduction lumen 18 Lead wire lumen 20 Ceramic substrate 21 Pedestal 22 Bonding wire 23 Elastic material 24 Infusion hole 25 Infusion lumen 26 Air introduction hole W Partition wall

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yoshio Kibuchi 143 Shimogasuya, Isehara-shi, Kanagawa

Claims (4)

[Claims] 1. A pressure sensor section 1 provided in front of a catheter body 2.
Is attached, and the branch 3 is attached to the back of the catheter body 2. One branch line 3 </ b> A connected to the back of the branch 3
Is connected to the resistance box 4, and the electric wire 6 is connected to the resistance box 4.
, A luer connector 11 is connected to the other branch line 3B, a pressure sensor 1S is arranged in the pressure sensor unit 1, and air is shut off to one branch pipe 3C in the branch unit 3. The filler 8 is loaded, the filter 13 is loaded into the other branch pipe 3D, and the lead wire 9 connected to the rear of the pressure sensor 1S is connected to the catheter body 2, the branch 3, the branch pipe 3C, and the branch line 3.
A catheter CA with a pressure sensor, which is connected to the resistance box 4 via A. 2. A pressure sensor 1 in front of a catheter body 2.
Is attached, and the branch 3 is attached to the back of the catheter body 2. One branch line 3 </ b> A connected to the back of the branch 3
Is connected to the resistance box 4, and the electric wire 6 is connected to the resistance box 4.
, A luer connector 11 is connected to the other branch line 3B, a pressure sensor 1S is disposed in the pressure sensor unit 1, and a rear portion 2B of the catheter body 2 projects into the resistance box 4. The luer connector 11 is protruded from the side of the rear portion 2B of the catheter main body 2, and the rear of the luer connector 11 is protruded to the outside of the resistance box 4. The luer connector 11 is connected to the rear end 2E of the rear portion 2B of the catheter main body 2. The air-blocking filler 8 is loaded, the filter 13 is loaded in the luer connector 11, and the lead wire 9 connected to the rear of the pressure sensor 1S is connected to the resistance box 4 via the catheter body 2 and the rear end 2E. A catheter CA2 with a pressure sensor, characterized in that: 3. A three-way cock 7 is arranged in the middle of the branch line 3B instead of connecting the luer connector 11 to the branch line 3B according to claim 1, and the balloon 1 is provided behind the branch line 3B.
4 is a catheter CA3 with a pressure sensor connected thereto. 4. A pressure sensor section 1A is mounted in front of the catheter body 2A, and a branch section 3E is provided behind the catheter body 2A.
The catheter body 2A is provided with a partition wall W, and the lumen 17 for introducing atmospheric pressure and the lumen 1 for the lead wire are provided.
8, one of the branch lines 3 connected behind the branch portion 3E.
A, a resistance box 4 is connected, a connector 5 is connected to the resistance box 4 via an electric wire 6, and the other branch line 3B
A luer connector 11 is connected to the pressure sensor 1A, and a pressure sensor 1S is disposed in the pressure sensor 1A.
A catheter CA4 with a pressure sensor, in which a lead wire 9 connected behind the pressure sensor 1S is connected to the resistance box 4 via a lead wire lumen 18, a branch 3E, and a branch line 3A.