JP3102980B2 - Double sensor catheter - Google Patents

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 sensor, and provides a double sensor catheter (hereinafter, "catheter") capable of simultaneously detecting pressure, blood flow, and air bubbles in a blood vessel.

[0002]

2. Description of the Related Art Conventionally, in blood flow measurement, physiological saline cooled to 0.degree. C. is flowed through a catheter into a blood vessel (flash) to cool a thermistor incorporated in the catheter and to maintain a temperature therein. Since the resistance value of the thermistor changed by the flowing blood is converted into a blood flow, measurement cannot be performed at all times, and there is a problem in the technique such as flushing a physiological saline solution every measurement. Recently, the number of endoscopic means has increased, and carbon dioxide (sometimes, nitrogen suboxide (laughing gas) or air) sent into the body cavity is not dissolved in blood and becomes minute bubbles. It could enter the heart, etc., and was dangerous. Thus, the present invention has conducted intensive studies in order to solve the above problems, and as a result, has arrived at the following invention.

[0003]

Means for Solving the Problems [1] The present invention provides:Body 2
The pressure sensor 3 (33) is arranged on the front side of (32).
And A balloon section behind the pressure sensor section 3 (33)
4 (34) is arranged, Behind the balloon part 4 (34)
The ultrasonic sensor unit 5 (35) having a bubble detection function
Place, A chemical solution behind the ultrasonic sensor 5 (35)
Catheter 1 in which injection part (blood collection part) 6 (36) is arranged
(31) is provided.  [2] The present invention provides:Pressure sensor on the front side of body 12
13 is arranged, Bubble detection behind the pressure sensor unit 13
An ultrasonic sensor unit 15 having an output function is arranged, The super
Behind the acoustic wave sensor unit 15, a drug solution injection unit (blood collection unit) 16
Is provided.  [3] The present invention provides:A pressure cell is provided on the front side of the main body 22 (52).
Sensor part 23 (53), The pressure sensor unit 2
The balloon part 24 (54) is arranged behind 3 (53),
A drug solution injection section (blood collection) is provided behind the balloon section 24 (54).
Part) 26 (56), The drug solution injection section (blood collection section)
An ultrasonic sensor having a bubble detection function behind 26 (56)
Catheter 21 (51) in which ser part 25 (55) is arranged
I will provide a.  [4] The present invention provides:A branch tube 4 is provided behind the main body 32.
1, a connector 37 for the pressure sensor monitor, Minute
A balloon syringe 38 via a branch tube 42, Branch
Ultrasound via the tube 43 (bubble detection (blood flow detection))
Monitor connector 40, Via the branch tube 44
In [1], each of which was connected with a liquid injector (blood sampling device) 39
The invention provides a catheter 1 as described.  [5] The present invention provides:A branch tube 6 is provided behind the main body 52.
3, a pressure sensor monitor connector 63a,
A balloon syringe 58 via a branch tube 64; Minute
Blood sampling syringe 59 and drug solution administration via branch tube 65
Connector 60, Ultrasonic (air) through the branch tube 66
Bubble detection (blood flow detection) monitor connector 66a
The catheter 51 according to [3] is provided respectively.
You.  [6] In the present invention, only a straight hole 82 is formed at the tip of the main body 72.
A taper 81 is formed on the front side of the main body 72, The te
The pressure sensor 73 is arranged behind the paper 81, Said
A super sound having a bubble detection function behind the pressure sensor unit 73
Provide a catheter 71 in which a wave sensor unit 75 is arranged.
You.  [7] The present invention provides a branch tube 8 behind the main body 72.
5 for drug solution administration / blood collection and guide wire insertion connector
Doctor 80, Pressure sensor module via branch tube 83
Connector 83a Via the branch tube 86
Connector for ultrasonic (bubble detection (blood flow detection)) monitor
86a, to which the catheter 7 according to [6] was connected.
Provide 1.

[0004]

FIG . 1 shows a double sensor catheter 1 (hereinafter, referred to as a double sensor catheter ) .
A schematic view of the catheter 1 and abbreviated), the catheter 1
Is a tube-shaped main body 2 having a diameter of 6 to 10 Fr and made of a synthetic resin such as polyurethane, polyvinyl chloride, silicone, polyethylene, or Teflon.
Pressure sensor unit 3 in sequence toward the rear, the balloon portion 4,
An ultrasonic sensor unit 5 having an air bubble detection function and a drug solution injection unit (blood collection unit) 6 are arranged . Front side of the main body 2
The pressure sensor unit 3 is disposed at
The balloon part 4 is arranged behind and behind the balloon part 4
An ultrasonic sensor unit 5 having an air bubble detection function is arranged in
A liquid medicine injection section (blood collection section) behind the ultrasonic sensor section 5
6 are arranged. The pressure sensor section 3 is constituted by a semiconductor type or a strain gauge type, and is -50 to +300 mm.
It is set so that the pressure of Hg can be sensed. The balloon part 4 is formed as a double lumen.

The ultrasonic sensor section 5 is made of a ceramic element, and can measure bubbles in blood by an ultrasonic Doppler system and an ultrasonic transmission system. In the case of the ultrasonic Doppler system, the ultrasonic sensor unit 5 uses a two-piece sensor system (a system in which transmission and consultation are performed by a pair of sensors; see FIG. 2) and a one-piece sensor system (a system in which transmission and consultation are performed by one sensor, FIG. 3). Reference) is adopted. In the case of the ultrasonic transmission method, a two-piece sensor method (see FIG. 4) is employed.

FIGS. 5 to 8 are schematic views of catheters 11 to 51 showing another embodiment of the present invention. The catheter 11 in FIG . 5 is obtained by removing the balloon portion 4 from the catheter 1 in FIG. The catheter 21 shown in FIG. 6 is the catheter 1 shown in FIG. 1 in which the positions of the ultrasonic sensor unit 5 (25) and the liquid medicine injection unit (blood collection unit) 6 (26) are moved back and forth.

The catheter 31 shown in FIG . 7 differs from the catheter 1 shown in FIG. 1 in that a branch tube 41 is provided behind the main body 2 (32).
A pressure sensor monitor connector 37, a balloon syringe 38, an ultrasonic wave (bubble detection (blood flow detection)) monitor connector 40, and a chemical injector 39 are provided via 42, 43, and 44.

The catheter 51 shown in FIG . 8 is different from the catheter 21 shown in FIG.
A pressure sensor monitor connector 63a, a balloon syringe 58, a blood collection syringe 59, a drug solution administration connector 60, and an ultrasonic monitor connector 66a are provided via 3, 64, 65 and 66. A pressure sensor monitor 57 and an ultrasonic monitor 62 are attached to the connectors 63a and 66a (the connectors 37 and 40 of the catheter 31 are the same).

The pressure sensor monitor 57 has a memory function and can set H / L, and displays a waveform and a pressure value (−).
50 to 300 mmHg), it is possible to display an alarm. Also, the ultrasonic monitor 62 can set H / L, set the amount of detected bubbles, and can also display an alarm. For the setting of the bubble detection amount, it is possible to set the integrated amount of minute bubbles or to set a certain amount or more. Further, the ultrasonic monitor 62 can display the blood flow rate in m1 / min, 1 / hour, or the like.

Next, a method of using the catheter 51 shown in FIG. 8 will be described. After inserting the distal end of the main body 52 into the patient's blood vessel, the balloon 54 is inflated and placed at a predetermined site along the blood flow. At that position, the blood pressure is measured by the pressure sensor unit 53 and the blood flow velocity is measured by the ultrasonic sensor unit 55, and the blood pressure and the blood flow velocity are constantly monitored. In addition, if necessary, the medicinal solution can be administered through the medicinal solution administration port 60, the branch tube 65, and the medicinal solution injecting section (blood collecting section) 56, and the cock 61 can be switched to the blood suction side to collect blood by a route reverse to the medicinal solution administration. . The ultrasonic sensor unit 55 can detect not only the blood flow velocity but also minute bubbles such as carbon dioxide gas. When bubbles are detected, blood containing bubbles can be collected in the same manner as in the above-described blood collection (above, FIG. 9 (use state in FIG. 8)). By moving the pulmonary artery (plate), air bubbles can be collected from many sites.

FIG. 10 is a schematic view of a catheter 71 inserted to a target site of a patient using a guide wire. In order to use a guide wire, a taper 81 is formed at the front side of the main body 72, and a straight hole 8 is formed at the tip.
2 are formed. By forming the straight holes 82, the dose of the drug solution can be increased as compared with the catheters 1 to 51, and blood can be collected easily. Pressure sensor part 7
The arrangement and role of the ultrasonic sensor 3 and the ultrasonic sensor unit 75 can be performed in the same manner as the catheters 1 to 51. A connector 80 for drug solution administration / blood collection and guide wire insertion is attached to the rear of the main body 72 via a branch tube 85.
Also, the branch tube 8 is the same as the catheter 51.
3, 86, a pressure sensor monitor 5 via a pressure sensor connector 83a and an ultrasonic sensor connector 86a.
7. The ultrasonic monitor 62 is mounted.

[0012]

Pressure measurement of the blood vessels in the pressure sensor part [effects of the Invention are possible, carbon dioxide blood flow velocity measurements and the blood from the ultrasonic sensor unit (nitrous oxide nitrogen (laughing gas) or air) fine such It is possible to detect various air bubbles. In addition, when air bubbles in blood are detected, blood with air bubbles can be easily collected. Since fine bubbles can be detected, earlier detection can be performed and safe treatment can be performed.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of the catheter of the present invention.

FIG. 2 is a partially enlarged view of the ultrasonic sensor unit of FIG. 1;

FIG. 3 is a partially enlarged view of the ultrasonic sensor unit of FIG. 1;

FIG. 4 is a partially enlarged view of the ultrasonic sensor unit of FIG. 1;

FIG. 5 is a schematic diagram of the catheter of the present invention.

FIG. 6 is a schematic view of the catheter of the present invention.

FIG. 7 is a schematic diagram of the catheter of the present invention.

FIG. 8 is a schematic diagram of the catheter of the present invention.

FIG. 9 is a use state diagram of FIG. 8;

FIG. 10 is a schematic diagram of the catheter of the present invention.

[Explanation of symbols]

1, 11, 21, 31, 41, 51, 71 Catheter 2, 12, 22, 32, 42, 52, 72 Body 3, 13, 23, 33, 43, 53, 63, 73 Pressure sensor part 4, 24, 34, 44, 54 Balloon part 5, 15, 25, 35, 45, 55, 75 Ultrasonic sensor part 6, 16, 26, 36, 46, 56, 76 Chemical solution injection part (blood collection part) 37, 63a, 83a Pressure Connector for sensor monitor 38, 58 Syringe for balloon 39 Chemical injector (blood sampler) 40, 66a, 86a Ultrasound (bubble detection (blood flow detection))
Connector for monitor 59 Syringe for blood sampling 60 Connector for drug solution administration 57 Pressure sensor monitor 62 Ultrasonic monitor 80 Connector for drug solution administration / blood sampling and guide wire insertion 81 Taper 82 Straight hole

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) A61B 5/0205 A61B 5/0215

Claims (7)

(57) [Claims] (1)Pressure sensor on front side of main body 2 (32)
Arrange part 3 (33), Behind the pressure sensor 3 (33), a balloon 4
Place (34), A bubble detection function is provided behind the balloon part 4 (34).
Ultrasonic sensor unit 5 (35) A chemical solution injection section behind the ultrasonic sensor section 5 (35)
(Blood sampling unit) 6 (36)
-Tel 1 (31). (2)A pressure sensor 13 is provided on the front side of the main body 12.
And place A bubble detection function is provided behind the pressure sensor unit 13.
Arrange the ultrasonic sensor unit 15, Behind the ultrasonic sensor unit 15, a chemical solution injection unit (blood collection
A catheter 11 in which a part 16 is arranged. (3)Pressure sensor on the front side of main body 22 (52)
-Part 23 (53) is arranged, Behind the pressure sensor 23 (53), a balloon 2
4 (54) is arranged, After the balloon part 24 (54)
The liquid medicine injection part (blood collection part) 26 (56) is arranged on the side, Bubbles are detected behind the liquid injection section (blood collection section) 26 (56).
The ultrasonic sensor unit 25 (55) having the output function
Catheter 21 (51). (4)A branch tube 41 is provided behind the main body 32.
Pressure sensor monitor connector 37 via A balloon syringe 38 via a branch tube 42; Ultrasonic (bubble detection (blood flow detection)
Out)) Monitor connector 40, A drug solution injector (blood sampler) 39 is connected via the branch tube 44.
2. The camera according to claim 1, wherein
Tetel 1. (5)A branch tube 63 is provided behind the main body 52.
Pressure sensor monitor connector 63a, A balloon syringe 58 via a branch tube 64; A blood sampling syringe 59 and a chemical solution are injected through a branch tube 65.
Giving connector 60, Ultrasonic wave (bubble detection (blood flow detection)
Out)) The monitor connectors 66a were connected respectively.
The catheter 51 according to claim 3, wherein: 6. A straight hole 82 is formed at the tip of the main body 72 and
A taper 81 is formed on the front side of the body 72, A pressure sensor 73 is arranged behind the taper 81
And A bubble detection function is provided behind the pressure sensor 73.
A category in which an ultrasonic sensor unit 75 is disposed.
-Tel 71. 7. A branch tube 85 is provided behind the main body 72.
Solution / blood collection and guide wire insertion connector
-80, Connector for pressure sensor monitor via branch tube 83
83a, Ultrasonic wave (bubble detection (blood flow detection)
Out)) Monitor connector 86a was connected respectively
The catheter 71 according to claim 6, wherein: