JPS63288168A - Balloon catheter - Google Patents

Abstract

PURPOSE:To easily and rapidly check whether the liquid supplied from a liquid supply opening is leaked across a balloon, by providing a temp. sensor to a part other than the region between a front balloon and a rear balloon. CONSTITUTION:In a double balloon catheter 15 having a front balloon 19 and a rear balloon 20 both of which are composed of silicone rubber and have stretchability and the liquid supply opening formed between both balloons, a temp. sensor 22 is provided to the leading end part of the catheter before the front balloon 19. Further, a balloon catheter 17 is constituted so that a stretchable balloon similarly composed of silicone rubber is formed to the leading end thereof and a suction opening is formed on this side. The temp. sensor 22 is connected to a thermometer 26 through the lead wire 22a and connector 22b thereof. Since the temp. sensor 22 is provided to the leading end part of the balloon catheter 15, the expanded state of the front balloon 19 can be easily and rapidly checked without using a contrast medium and, by this constitution, the washing of a donor internal organ can be sufficiently performed at an early stage.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a balloon catheter used, for example, when perfusing and preserving an organ within a corpse.

[Conventional technology]

For example, in organ transplantation, in order to reduce damage caused by warm ischemia of the donor organ, Artificial Organs Vol. 9, No. 6, 1980
Intracadaveric organ perfusion as disclosed in 2010 P., 795- is performed.

In this cadaveric organ perfusion, a balloon catheter having a front balloon, a rear balloon, and a fluid delivery opening provided between these balloons is used, and this catheter is inserted into the donor's aorta, and the catheter is inserted into the donor's aorta before and after the artery of the donor organ. With each balloon inflated to prevent blood from entering the donor organ, a large amount of low-temperature cleaning fluid is injected into the donor organ through the fluid delivery openings between the balloons.

[Problem that the invention seeks to solve]

However, the above-mentioned conventional balloon catheter does not have a mechanism to check the expansion state of each balloon expanded within the aorta, and as a result, if expansion is insufficient, the cleaning fluid may compress the balloon and cause the gap between the front and back balloons. In some cases, the donor organ may not be able to be properly cleaned at an early stage because the donor organ may flow into other aortas. As a method of solving such problems, it may be possible to check the expansion state of the balloon by contrast imaging using X-rays or the like, but this method has the disadvantage of being extremely troublesome and lacking in speed.

The present invention was made by focusing on such conventional problems, and it is possible to easily and quickly determine whether or not the expanded state of the balloon, that is, whether the liquid supplied from the liquid feeding opening is leaking beyond the balloon. The purpose of the present invention is to provide a balloon catheter that is appropriately configured and arranged so that it can be checked.

[Means for solving problems]

In order to achieve the above object, the present invention provides a temperature sensor at a portion other than between the front balloon and the rear balloon.

[For production]

In this way, if a temperature sensor is provided in the area other than between the front and rear balloons, if the liquid supplied through the liquid feeding opening leaks from between the balloon and a tubular organ such as a blood vessel, this liquid will be detected. Since the temperature of is sufficiently lower than the temperature of blood in the tubular organ, the output value of the temperature sensor will immediately change. Therefore, the expansion state of the balloon can be easily and quickly determined from the output value of this temperature sensor. I can recognize it.

[Embodiment] FIG. 1 shows a first embodiment of the present invention. In this example, in order to minimize damage caused by warm ischemia of donor organs during organ transplantation, after all the blood in the organs was washed away in the cadaver, artificial blood and other various components were collected at 0°C. This method is applied to a cadaveric organ perfusion device that circulates perfusate at 10°C to organs to preserve the organs inside a corpse. The organ perfusion device main body 1 is provided with a water supply port 2, a recovery port 3, and a drain port 4, and the recovery port 3 is connected to the drain port 4 and the inflow port of the perfusion fluid storage tank 7 via a non-pulsating pump 5 and a switching valve 6. Concatenate each. The water supply port of the irrigation fluid storage tank 7 is connected to a filter 8 having a mesh opening of approximately 100 μm.
, a switching valve 1 via an oxygenator 9 made of a model or a bubble type used in a normal heart-lung machine and a pH controller 10.
Connect to 1. The switching valve 11 has an organ cleaning liquid storage tank 1.
2 is also connected, and the switching valve 11 switches between irrigation fluid and cleaning fluid, and a non-pulsating pump 13 and a pressure sensor 14 are connected.
The water is supplied to the water supply port 2 through the . Although not shown in the perfusion liquid storage tank 7, the temperature of the perfusion liquid is kept at O'C~1.
A temperature control mechanism for heating and cooling to a set temperature within 0°C is provided, and the organ cleaning liquid storage tank 12 has a heat-retaining structure so that the temperature of the cleaning liquid stored therein does not rise.

A balloon catheter 15 inserted into the aorta is inserted into the water supply port 2.
A liquid feeding mouthpiece 16 is connected to the collection port 3, and a suction mouthpiece 18 of a balloon catheter 17 inserted into the vena cava is connected to the collection port 3.
Concatenate.

In this embodiment, the balloon catheter 15 includes a flexible front balloon 19 made of silicone rubber or the like, a rear balloon 20, and a liquid feeding opening 21 formed between these balloons.
In this double balloon catheter, a temperature sensor 22 is provided at the tip of the catheter in front of the front balloon 19.

Further, the balloon catheter 17 has an extensible tip balloon 23 similarly made of silicone rubber or the like at its tip, and a suction opening 24 formed in the front.

Air supply lines 19a, 20a connected to each balloon 19, 20 and 23 of balloon catheters 15 and 17
and 23a are connected via their caps 19b, 20b and 23b to a balloon expander 25, thereby inflating each balloon 19, 20 and 23. Further, the temperature sensor 22 is connected to a thermometer 26 via its lead wire 22a and connector 22b.

Note that the above-mentioned parts are connected using perfusion tubes made of silicone rubber or the like.

The operation of this embodiment will be explained below using a kidney transplant as an example.

First, the balloon catheter 15 was inserted immediately after the donor's cardiac arrest.
is inserted into the aorta 32 so that the renal artery 31 is located between the front balloon 19 and the rear balloon 2o, and the front balloon 19 and the rear balloon 20 are expanded by the balloon expander 25, so that blood flows into the kidneys. Avoid entering the artery 31. Similarly, the balloon catheter 17 is also inserted into the vena cava 34 so that the balloon tip 23 is positioned between the renal vein 33 and the heart, and the balloon tip 23 is expanded.

Thereafter, the liquid feeding caps 16 and suction caps 18 of the balloon catheters 15 and 17 are respectively connected to the water feeding port 2 and the collection port 3 of the device main body 1 via perfusion tubes, and then cooled into the organ cleaning fluid storage tank 12. A stored irrigation liquid such as lactated Ringer's solution is injected into the kidney 35 from the liquid feeding opening 21 via the switching valve 11, pump 13, pressure sensor 14, water inlet 2 and balloon catheter 15.

The operation of the pump 13 is controlled based on the output of the pressure sensor 14 so that the water supply pressure does not exceed a set pressure.

Here, the temperature detected by the temperature sensor 22, which is displayed by the thermometer 26, is monitored, and if the temperature drops rapidly, it is determined that the front balloon 19 of the balloon catheter 15 is not sufficiently expanded, and the balloon Expand further by 1$125.

The washing fluid injected into the kidney 35 washes away the blood within the kidney 35 and reaches the vena cava 34 via the renal vein 33. This blood-containing cleaning fluid is pumped into the balloon catheter 1 by a pump 5.
7 is collected through the suction opening 24 and discharged to the outside via the switching valve 6 and the drain port 4.

After the kidney 35 is sufficiently washed with the washing liquid and almost no blood components are present in the washing liquid collected from the balloon catheter 17, the switching valves 6 and 11 are switched to cool the liquid to about 4°C in the perfusion liquid storage tank 7. The perfusion fluid that has been used is supplied into the kidney 35. This perfusate is first filtered through a filter 8 to remove large contaminants such as fibilin and blood clots, and then passed through an artificial lung 9.
is oxygenated and supplied to the pH control section 10. p) II
l]? In the i1 section 10, the P of the perfusate is detected by the PAL sensor.
When the H value is measured and there is a difference between the measured pH value and the set value, Meylon is added to the perfusate,
By adding carbon dioxide gas, the pH value is controlled to approximately the set value. Note that the pH sensor may be a glass electric scraper or an I''5FII!T, but it is more advantageous to use an I5FET in terms of miniaturization and responsiveness.This pH control unit 1
The perfusate whose pH is controlled at 0 is supplied to the switching valve 11 and the pump 13.
, is supplied to the kidney 35 from the balloon catheter 23 via the pressure sensor 14 and the water supply port 2.

The perfusion fluid supplied to the kidney 35 as described above is collected by the balloon catheter 17, and is collected by the collection port 3 of the device body 1.
, through the pump 5 and the switching valve 6, and returns to the irrigation fluid storage tank 7, where it is cooled again and circulated.

In this way, since the temperature sensor 22 is provided at the tip of the balloon catheter 15 in this embodiment, contrast imaging is not performed (
The state of expansion of the front balloon 19 can be checked easily and quickly even when the donor organ is in use, so that the donor organ can be thoroughly cleaned at an early stage.

FIG. 2 shows a second embodiment of the invention. This balloon catheter 41 has a non-stretchable heat insulating balloon 42 made of polyethylene or the like provided behind the rear balloon 20 in the balloon catheter 15 shown in FIG. 1, and a temperature sensor 43 provided on the surface of this balloon 42. It is something. The heat insulating balloon 42 is similarly balloon expanded 9125 via the air supply line 42a and the base 42b.
(See Figure 1) and expand it.
The temperature sensor 43 has a lead wire 43a and a connector 43b.
Similarly, it is connected to a thermometer 26 (see FIG. 1) through the holder so as to display the temperature detected by the temperature sensor 22 provided at the tip. Note that the diameter of the heat insulating balloon 42 when expanded is smaller than the inner diameter of the insertion site such as a blood vessel.

In this way, the heat insulating balloon 4 is placed behind the rear balloon 20.
By providing the temperature sensor 43 through the catheter 2, the expansion state of the rear balloon 20 can be easily and quickly checked from changes in the detected temperature without being affected by the temperature of the cleaning fluid or perfusion fluid passing through the catheter. be able to.

Note that this invention is not limited to the embodiments described above, and can be modified or modified in many ways. For example, in the second embodiment, the temperature sensor 22 at the tip may be omitted, or the temperature sensor 22 at the tip may be omitted, or the temperature sensor 22 may be 42 may be omitted and the temperature sensor 43 may be provided directly on the catheter.

〔Effect of the invention〕

As described above, according to the present invention, the expansion state of the balloon can be easily and quickly checked from the temperature detected by the temperature sensor by providing a temperature sensor in a portion other than between the front balloon and the rear balloon 7. This allows the donor organ to be thoroughly cleaned at an early stage.

[Brief explanation of drawings]

FIG. 1 is a diagram showing a first embodiment of the present invention, and FIG. 2 is a diagram showing a second embodiment. 1...Device body 2...Water supply port 3...Collection port 4...Drain port 5...Pump
6...Switching valve 7...Irrigation liquid storage tank 8.
...filter 9...artificial lung 10...p
) Control unit 11...Switching valve 12...Organ cleaning liquid storage tank 13...Pump 14.
...Pressure sensor 15...Balloon catheter 17...Balloon catheter 19, 20...Balloon 21...Liquid feeding opening 22...Temperature sensor 23...Balloon 24
... Suction opening 25 ... Balloon expander 2
6...Thermometer 41...Balloon catheter 42...Insulated balloon 43...Temperature sensor procedure Amendment Written August 5, 1986 Kunio Ogawa, Commissioner of the Patent Office 1, Indication of the case Showa 1962 Patent Application No. 122540 2 Name of the invention Balloon catheter 3 Person making the amendment Relationship to the case Patent applicant (037) Olympus Optical Industry Co., Ltd. 4 Agent 5 Subject of the amendment

Claims (1)

[Claims] 1. A balloon catheter having a front balloon, a rear balloon, and a liquid feeding opening provided between these balloons, characterized in that a temperature sensor is provided in a portion other than between the front balloon and the rear balloon. catheter.