JP2014108327A - Medical catheter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To supply necessary and sufficient amounts of liquid to a space between balloons to partition the inside of a body cavity.SOLUTION: A medical catheter 1 includes two expandable balloons 2,3 disposed at intervals, inflation fluid supplying pipe lines 4a,4b that can supply inflation fluid to the balloons 2,3, a liquid feeding pipe line 4c that supplies liquid to a space between the balloons 2,3, and a liquid sensor 5 that is disposed at any position between the balloons 2,3 and detects the presence or absence of the liquid supplied from the liquid feeding pipe line 4c.

Description

  The present invention relates to a medical catheter.

Conventionally, a catheter for observing the inner wall of a blood vessel is known (see, for example, Patent Document 1).
This catheter includes two balloons spaced apart in the longitudinal direction of the blood vessel, and inflates both balloons to partition the inside of the blood vessel, and secures a transparent field of view by filling the partitioned space with liquid. I am going to do that.

Japanese Patent No. 2758349

  However, the catheter of Patent Document 1 has a disadvantage that it is difficult to supply an appropriate amount of transparent liquid when supplying the transparent liquid to the space between the balloons. For this reason, there are inconveniences in that an excessive amount of transparent liquid is supplied and the pressure of the liquid damages living tissue or causes pain such as a sore throat. On the other hand, when sufficient liquid is not supplied, there is a problem that it is difficult to secure a transparent visual field or treatment is insufficient.

  The present invention has been made in view of the above-described circumstances, and an object of the present invention is to provide a medical catheter that can supply a necessary and sufficient amount of liquid between balloons that define a body cavity.

In order to achieve the above object, the present invention provides the following means.
One embodiment of the present invention includes two expandable / contractable balloons arranged at intervals, an inflation fluid supply conduit capable of supplying inflation fluid to each balloon, and a liquid supply conduit for supplying a liquid between the balloons And a liquid sensor that is arranged at any position between the balloons and that detects the presence or absence of the liquid supplied from the liquid supply conduit.

  According to this aspect, the two balloons are deflated and inserted into the body cavity, the inflation fluid is supplied into each balloon via the inflation fluid supply conduit, and each balloon is inflated. The body cavity is occluded in position to form a closed space between the two balloons. Thereafter, the liquid is supplied to the space between the balloons via the liquid feeding conduit. At this time, the liquid can be stored in the closed space by supplying the liquid until the liquid is detected by the liquid sensor. In other words, by adjusting the position of the liquid sensor between the balloons, a necessary and sufficient amount of liquid can be supplied to the closed space between the balloons, and the patient suffers from pain such as damage to the living tissue and throat sensation. This can be prevented.

In the said aspect, the said liquid sensor may be arrange | positioned in the position close to one of the said balloons.
By doing this, by adjusting the patient's position so that the balloon close to the liquid sensor is on the upper side and supplying the liquid, the liquid can be easily filled in the closed space without excessively supplying the liquid. Can do.

Moreover, in the said aspect, the said liquid sensor may be arranged with two or more intervals in the space | interval direction of the said balloon.
By doing so, the liquid level in the closed space between the balloons can be detected in a plurality of stages by supplying the liquid by adjusting the patient's body position so that the balloon moves up and down.

In the above aspect, at least one of the balloons may be provided with a channel into which a treatment instrument can be inserted into the space from outside the space defined by the two balloons.
By doing so, the treatment instrument is inserted into the closed space formed between the two balloons by inflating the two balloons from the outside of the closed space via the channel, and is arranged in the closed space between the balloons. The affected area can be treated.

Moreover, in the said aspect, while supporting the said treatment instrument so that a movement is possible along the longitudinal direction of this channel, the sealing member which can seal this channel may be provided in the said channel.
By doing in this way, the treatment instrument inserted in the closed space formed between two balloons can be moved in the longitudinal direction of the channel and aligned with the affected part. At this time, the channel is sealed by the seal member, and the liquid in the closed space can be prevented from leaking to the outside.

Examples of the therapeutic instrument include an endoscope and an ultrasonic probe that emits ultrasonic waves. In particular, in the case of an ultrasonic probe, the space is filled with a necessary and sufficient liquid (ultrasonic propagation medium), so that the affected part of the inner wall constituting the closed space is reliably irradiated with ultrasonic waves. be able to.
Moreover, in the said aspect, when the liquid is detected by the said liquid sensor, you may provide the alerting | reporting means which alert | reports this.

  According to the present invention, there is an effect that a necessary and sufficient amount of liquid can be supplied between balloons partitioning the body cavity.

1 is a partial longitudinal sectional view showing a medical catheter according to a first embodiment of the present invention. It is a figure which shows the state which mounted | wore the stomach with the medical catheter of FIG. It is a partial longitudinal cross-sectional view which shows the medical catheter which concerns on the 2nd Embodiment of this invention. It is a block diagram explaining control of the medical catheter of FIGS. 1-3.

A medical catheter 1 according to a first embodiment of the present invention will be described below with reference to the drawings.
As shown in FIG. 1, the medical catheter 1 according to the present embodiment includes two balloons 2 and 3 that are arranged at intervals, a tube 4 that connects these balloons 2 and 3, and the tube 4. The liquid sensor 5 is provided.

  The balloons 2 and 3 are made of, for example, a rubber material such as silicone rubber or latex rubber, or a resin material that can expand and contract. As shown in FIG. 1, the tube 4 has a multi-lumen structure having a plurality of inner holes 4 a to 4 c formed in the longitudinal direction.

  The tube 4 is provided with side holes 4d to 4f that open to any of the inner holes 4a to 4c at positions arranged in the balloons 2 and 3, respectively. The balloons 2 and 3 are inflated by supplying inflation fluid (gas or liquid) from the inner holes 4a and 4b to the balloons 2 and 3 via the side holes 4d and 4e, and then via the side holes 4d and 4e. The balloons 2 and 3 can be deflated by discharging the inflation fluid into the inner holes 4a and 4b.

  Each balloon 2, 3 is inserted into the body cavity in a contracted state and inflated at a predetermined position, so that it is inflated more than the cross-sectional shape of the body cavity to partition the body cavity, and between the two balloons 2, 3. A closed space can be formed.

  The other inner hole 4 c of the tube 4 has a side hole 4 f that opens to the outside between the two balloons 2 and 3. By supplying the liquid via the inner hole 4c and the side hole 4f, the liquid can be supplied to the closed space between the balloons 2 and 3.

  The liquid sensor 5 is disposed between the two balloons 2 and 3 and on the outer surface of the tube 4 at a position close to the balloon 3 on the proximal end side. As the liquid sensor 5, for example, a sensor that includes two electrodes (not shown) with a minute gap and detects the presence of the liquid by connecting the two electrodes with the liquid is used. By detecting when the closed space between the balloons 2 and 3 is filled with liquid and the liquid contacts the liquid sensor 5, it is easily detected that the closed space is filled with necessary and sufficient liquid. can do.

The operation of the medical catheter 1 according to this embodiment configured as described above will be described below.
When the medical catheter 1 according to the present embodiment is used to fill a body cavity, for example, the stomach A with liquid, two balloons 2 and 3 that are spaced as much as the distance between the cardia B and the pylorus C are provided. A medical catheter 1 is prepared.

As shown in FIG. 2, the patient's posture is selected such that the upper body is raised and the cardia B is positioned above the stomach A in the vertical direction.
In this state, with the two balloons 2.3 deflated, the medical catheter 1 is inserted into the stomach A via the esophagus under X-ray monitoring, and the distal balloon 2 is connected to the pylorus C. The insertion of the medical catheter 1 is stopped when the proximal-side balloon 3 is disposed at the position of the cardia B.
The stomach A is sufficiently contracted in the hungry state, and a small amount of air is present inside.

  In this state, the inflation fluid is supplied to the inner holes 4a and 4b of the tube 4 connected to the side holes 4d and 4e of the balloons 2 and 3, so that the balloons 2 and 3 are inflated. Thereby, the pylorus C is closed by the balloon 2 on the distal end side, and the cardia B is closed by the balloon 3 on the proximal end side.

  By doing in this way, since the front and back of stomach A are closed by two balloons 2 and 3, stomach A arranged between balloons 2 and 3 becomes a closed space where it was sealed. In this state, by supplying the liquid D to the inner hole 4c connected to the side hole 4f opening in the stomach A, the liquid is supplied into the stomach A through the side hole 4f, and the liquid D is supplied into the stomach A. Can be met.

  Then, the stomach D is filled with the liquid D, and as shown in FIG. 2, the liquid sensor 5 disposed immediately below the balloon 3 closing the cardia B at the upper part of the stomach A becomes the liquid D. When contact is made, the liquid D is detected by the liquid sensor 5, and the supply of the liquid D is stopped at this point. As a result, the stomach can be almost filled with the liquid D, and the liquid D can be kept in contact with all the inner walls of the stomach A even if the patient's posture is changed thereafter.

Thus, according to the medical catheter 1 which concerns on this embodiment, the liquid D can be filled with the liquid D by the liquid sensor 5, and it can prevent supplying too much. As a result, it is possible to fill the stomach A with a necessary and sufficient amount of the liquid D without giving the patient discomfort such as damage to the stomach A tissue or throat due to excessive supply.
After this, there is an advantage that the space in the stomach A can be maintained in the state where the liquid D is filled, regardless of whether the body position is turned upside down and changed to the left side prone position, the right side prone position or the lean side. .

Next, a medical catheter 10 according to a second embodiment of the present invention will be described below with reference to the drawings.
In the description of the present embodiment, portions having the same configuration as that of the medical catheter 1 in FIG.

  As shown in FIG. 3, the medical catheter 10 according to the present embodiment includes the channel 11 that penetrates the balloon 3 on the proximal end side, and the medical catheter 1 according to the first embodiment. It is different.

  The channel 11 has an inner diameter dimension slightly larger than the outer diameter of a treatment instrument 12 to be inserted, for example, an ultrasonic probe (hereinafter also referred to as an ultrasonic probe 12). It can be arranged to be movable in the direction. The channel 11 is provided to be openable and closable, and when the ultrasonic probe 12 is inserted, a seal member 13 that seals a gap between the outer surface of the ultrasonic probe 12 and the inner surface of the channel 11 is provided.

  The seal member 13 may be a valve that is opened when the ultrasonic probe 12 is inserted and closed when the ultrasonic probe 12 is extracted, or when the ultrasonic probe 12 is kept inserted in the channel 11. Alternatively, an O-ring that seals a ring-shaped space between the inner surface of the channel 11 and the ultrasonic probe 12 may be used.

  According to the medical catheter 10 according to the present embodiment configured as described above, for example, the balloon 2 is inserted into the stomach A as a body cavity, and the balloons 2 and 3 are arranged on the cardia B and the pylorus C. Is inflated to seal the stomach A between the balloons 2 and 3 in a closed space. The liquid D is supplied through the inner hole 4 c of the tube 4 until the liquid D is detected by the liquid sensor 5.

  Thereafter, the distal end of the ultrasonic probe 12 is introduced into the stomach A from the esophagus side through the channel 11 provided in the balloon 3 on the proximal end side arranged in the cardia C. Since sufficient liquid necessary for ultrasonic examination until the liquid D is detected by the liquid sensor 5 is stored in the stomach A, the liquid D is present between the distal end of the ultrasonic probe 12 and the affected part of the inner wall of the stomach A. It can be filled. Therefore, the tip position of the ultrasonic probe 12 can be adjusted to irradiate the affected area with ultrasonic waves sufficiently efficiently.

  In each of the above embodiments, since the liquid sensor 5 is disposed at a position close to the balloon 3 on the proximal end side, the posture of the patient is adjusted so that the balloon 3 on the proximal end side is disposed on the upper side. Thus, only by supplying the liquid D until it is detected by the liquid sensor 5, it can be supplied so that the liquid D is sufficiently filled in the stomach A. Therefore, once the liquid D is filled, the liquid D can be brought into contact with almost the entire inner wall of the stomach A regardless of the patient's position.

  Instead, if the position of the affected part can be specified and the liquid D can be stored so as to cover the affected part, the necessary amount of the liquid D can be detected when the entire volume of the stomach A does not need to be filled. The liquid sensor 5 may be provided at any position, for example, an intermediate position between the two balloons 2 and 3. Further, a plurality of liquid sensors 5 may be provided at intervals in the interval direction between the balloons 2 and 3. By doing in this way, the supply amount of the liquid D can be changed according to the position of the liquid sensor 5 that detects the liquid D.

  In the present embodiment, as shown in FIG. 4, the liquid injection means 14 for supplying the liquid D into the stomach A, the treatment instrument 12, and the notification means 15 are detected signals from the liquid sensor 5. You may provide the control part 16 controlled based on. The control unit 16 determines whether or not the amount of liquid supplied into the stomach A is sufficient, and controls the supply of the liquid D based on the determination result by the determination unit 17, or a treatment instrument 12 may be provided with an instruction unit 18 for controlling on / off.

  As the notification means 15, any means such as a display, a lighting display device such as Patlite (registered trademark) or LED, or a sound generation device such as a speaker can be used. The notification means 15 that has received the determination result from the determination unit 17 may change the display and sound according to the determination result. In particular, when a plurality of liquid sensors 5 are provided, different displays and sounds may be generated depending on the position of the liquid sensor 5 that has detected the liquid D.

  If the amount of liquid supplied into the stomach A is not sufficient as a result of the determination by the determination unit 17, the control unit 16 continues the liquid injection by the liquid injection means 14 and maintains the treatment instrument 12 in the off state. The notification means 15 notifies the outside that the liquid injection is insufficient. On the other hand, as a result of the determination by the determination unit 17, when the amount of liquid supply into the stomach A is sufficient, the liquid injection by the liquid injection means 14 is stopped, the treatment instrument 12 can be turned on, and the liquid injection The notification means 15 notifies the outside that it is sufficient.

  In this way, by prohibiting the operation of the treatment instrument 12 in a state where the liquid D is not sufficiently supplied, a fail-safe function can be performed so that the doctor does not erroneously start the treatment.

  In each of the above embodiments, the stomach A is exemplified as the patient's body cavity. However, instead of this, it may be applied to any body cavity such as the esophagus or the intestine. Moreover, although the ultrasonic probe 12 was illustrated as the treatment instrument 12, it is not limited to this.

1,10 Medical catheter 2,3 Balloon 4a, 4b Inner hole (expansion fluid supply line)
4c Inner hole (liquid supply line)
5 Liquid sensor 11 Channel 13 Seal member 15 Notification means

Claims (6)

Two expandable / contractible balloons spaced apart;
An inflation fluid supply conduit capable of supplying inflation fluid to each balloon;
A liquid supply line for supplying a liquid between the balloons;
A medical catheter provided with a liquid sensor disposed at any position between the balloons and detecting the presence or absence of liquid supplied from the liquid supply conduit.   The medical catheter according to claim 1, wherein the liquid sensor is disposed at a position close to any of the balloons.   The medical catheter according to claim 1 or 2, wherein a plurality of the liquid sensors are arranged at intervals in the interval direction of the balloon.   The medical catheter according to any one of claims 1 to 3, wherein at least one of the balloons is provided with a channel into which a treatment instrument can be inserted into the space from outside the space defined by the two balloons.   The medical catheter according to claim 4, wherein the channel is provided with a seal member that movably supports the treatment instrument along the longitudinal direction of the channel and that can seal the channel.   The medical catheter according to any one of claims 1 to 5, further comprising an informing means for informing when a liquid is detected by the liquid sensor.

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