WO2008038430A1

WO2008038430A1 - Indicator for medical tool with cuff

Info

Publication number: WO2008038430A1
Application number: PCT/JP2007/058547
Authority: WO
Inventors: Kiyoshi Chikashige
Original assignee: Advanex Inc.
Priority date: 2006-09-26
Filing date: 2007-04-19
Publication date: 2008-04-03
Also published as: JP2008079704A

Abstract

An indicator for a medical tool with a cuff being fixed to the medical tool with a cuff and indicating the internal pressure of the cuff. The indicator for a medical tool with a cuff comprises a check valve, a joint for connection with the medical tool with a cuff, and an indicator body provided between the check valve and the joint. A guide channel for guiding fluid injected through the check valve to the joint side, and an index chamber separated from the guide channel airtightly are formed in the indicator body, and a plurality of balloon-like index bodies communicating with the interior of the cuff are provided in the index chamber to be able to expand/contract in response to the internal pressure of the cuff. The plurality of index bodies are arranged to exhibit different degrees of expansion/contraction in response to the internal pressure of the cuff, and the indicator body is provided with a window for making at least the degree of expansion/contraction of each of the plurality of index bodies visible. The indicator for a medical tool with a cuff can judge an internal pressure fall of the cuff quickly and accurately.

Description

Specification

Indicator for medical device with cuff

Technical field

[0001] The present invention relates to an indicator for a cuffed medical device which is attached to the cuffed medical device and indicates the internal pressure of the cuff of the medical device.

In this application, on September 26, 2006, Tsujimoto (the Japanese Patent Application No. 2006-260895 filed here (claimed priority), the contents of which are incorporated herein by reference.

Background art

Conventionally, in the medical field, a method of occluding a body passage using a cuffed (ballooned) medical device is well known. For example, an “intratracheal tube” used for artificial respiration has one end inserted through the patient's mouth (oral) or nose (transnasal) and the other end connected to the ventilator. In this state, when the cuff of the “tracheal tube” is inflated in the trachea, the patient is obstructed below the trachea (lung) and forced to breathe with a ventilator that is in communication through the “intratracheal tube”.

Another example is a “pulmonary artery balloon catheter”. In this example, a catheter is inserted into a blood vessel via an appropriate blood vessel such as an arteriole, and the force tail reaches the pulmonary artery through the blood flow.

At this position, the balloon is inflated, and a sensor placed at the tip of the catheter is used to measure the so-called “wedge insertion pressure” where blood enters the lungs.

[0004] However, all such medical devices with a cuff (balloon) block the body passage due to the expansion of the cuff. Mucosal damage, “balloon catheters for pulmonary arteries”, had problems such as blood vessel damage.

[0005] In order to solve such problems, conventionally, overexpansion that occurs when a cuff closes a body route is prevented, the workability is simplified, and it is used for various medical devices with cuffs (balloons). A cuff (balloon) inflatable assisting device is provided (see, for example, Patent Document 1). [0006] By the way, in the medical device with a cuff (vanolene), the above-described problems occur due to overexpansion. On the other hand, when the internal pressure of the cuff decreases and the preset degree of expansion cannot be maintained, the trachea is There are also other problems when obstructed due to insufficiency of forced breathing by the ventilator, or when the function of floating when the catheter is placed in the bloodstream and reaches the pulmonary artery is reduced. The force is formed by rubber or the like, so air as a fluid leaks little by little at the molecular level, and the internal pressure decreases and the degree of expansion decreases.

[0007] Conventionally, with regard to such a decrease in internal pressure, for example, a pilot balloon has been provided at a branching portion of a medical device with a cuff to which a syringe is connected to inject air into the cuff, and the degree of expansion of this pie mouth banolane is increased. It is detected by checking the appearance and tactile sensation.

Patent Document 1: Japanese Unexamined Patent Publication No. 2003-116999

Disclosure of the invention

Problems to be solved by the invention

[0008] However, if the degree of expansion of the pilot balloon is confirmed by the appearance and the tactile sensation in this way, and the decrease in the internal pressure of the cuff is detected, it takes a labor force S to confirm the degree of expansion, and there is some experience. Because it was necessary, it was very difficult to determine the decrease in the internal pressure of the cuff quickly and accurately.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an indicator for a medical device with a cuff that can quickly determine the internal pressure of the cuff and determine the force accurately. Means for solving the problem

In order to achieve the above object, an indicator for a cuffed medical device of the present invention is an indicator for a cuffed medical device that is attached to the cuffed medical device and indicates the internal pressure of the cuff of the medical device,

A check valve connectable to injection means such as a syringe for injecting fluid into the cuff; a connection portion connected to the cuffed medical device and communicating with the cuff;

An indicator main body provided between the check valve and the connecting portion, and the fluid injected through the check valve by the injection means into the indicator main body. A guide path that guides to the side, and an indicator chamber that communicates with the outside of the indicator body and is hermetically separated from the guide path, In the indicator chamber, a plurality of balloon-like indicator bodies communicating with the inside of the cuff through the connecting portion are provided so as to be inflatable and inflatable corresponding to the internal pressure of the cuff,

The plurality of indicator bodies are configured with different degrees of expansion / contraction corresponding to the internal pressure in the cuff,

The indicator body is formed with a window portion that allows at least the degree of expansion / contraction of each of the plurality of indicator bodies to be visually recognized.

[0010] This indicator for a medical device with a cuff connects an injection means such as a syringe to a check valve, and injects a fluid such as air, so that the fluid passes through a guide path and a connection path into the cuff. enter. Therefore, the cuff can be expanded to a predetermined degree of expansion. Even if the injection means is removed from the check valve in this state, the check valve acts so that the air (fluid) in the cuff does not leak out through the guide line.

Further, when the cuff is held in an expanded state as described above, the plurality of index bodies in the index chamber communicating with the cuff are expanded in accordance with the internal pressure of the cuff. At this time, since the plurality of indicator bodies are configured to have different degrees of expansion / contraction corresponding to the internal pressure of the cuff, the internal pressure of the cuff is reduced by visually checking each expansion degree from the window portion of the indicator body. It is possible to determine the force quickly and accurately.

[0011] For example, when two indicator bodies are provided, one indicator body sufficiently expands when the internal pressure of the cuff is appropriate, and the other indicator body fully expands when the internal pressure of the cuff is excessive. Form it as you do. Then, when the internal pressure of the cuff is appropriate, one index body is sufficiently expanded, and the other index body has a small degree of expansion. Therefore, it can be seen that the internal pressure of the cuff is appropriate by visually observing the state where only one of the index bodies is sufficiently expanded.

In addition, when the internal pressure of the cuff is excessive, both index bodies expand sufficiently, and by visually recognizing such a state, it can be understood that the internal pressure of the cuff is excessive.

When the internal pressure of the cuff is reduced, the expansion of both index bodies is slightly reduced, so it can be seen that the internal pressure of the cuff is reduced by visually checking such a state.

[0012] Further, each of the plurality of indicator bodies of the indicator for a cuffed medical device has its mouth The portion may be open to the guide path so that the inside thereof communicates with the cuff through the guide path.

In this way, the structure of the indicator body is simplified, the assemblability of the indicator body is improved, and the manufacture is facilitated.

[0013] Further, it is preferable that each of the plurality of index bodies of the cuffed medical instrument indicator is configured to be identifiable.

For example, the color of the index body is individually changed so that each can be discriminated, and the index body of the color corresponds to the internal pressure of the cuff to recognize the force. It is possible to quickly and accurately determine whether the internal pressure is appropriate.

The invention's effect

[0014] In the indicator for a medical device with a cuff of the present invention, when the cuff is held in an inflated state, a plurality of indicator bodies in the indicator chamber communicating with the cuff expands corresponding to the internal pressure of the cuff. It is configured as follows. Therefore, by visually observing the degree of expansion of each of the plurality of indicator bodies from the window portion of the indicator body, it is possible to quickly and accurately determine a decrease in the internal pressure of the cuff. Therefore, there is no inconvenience that it takes time to detect a decrease in internal pressure and a certain amount of experience is required as in the prior art.

Brief Description of Drawings

FIG. 1 is a diagram showing a schematic configuration of a cuffed medical device to which an indicator of the present invention is attached.

FIG. 2 is a view showing a conventional medical device with a cuff.

FIG. 3 is a side sectional view showing a schematic configuration of an embodiment of the indicator for a cuffed medical device of the present invention.

4 is an exploded perspective view of the indicator for a cuffed medical device shown in FIG.

FIG. 5 is a perspective view of an indicator body.

FIG. 6 is a perspective view of an indicator body.

FIG. 7 is a front view of one side of the indicator body.

8 is a cross-sectional view taken along line AA in FIG.

FIG. 9 is a perspective view of an index body. Fig. 10 is a side sectional view of the indicator body.

FIG. 11 is a diagram for explaining how to use the cuffed medical device.

Explanation of symbols

1 Indicator (medical instrument indicator with cuff)

2 Cuff side connection (connection)

3 Indicator body

4 Check valve

5 Syringe side connection

8 Guideway

9 Indicator room

9a Communication hole

11 Indicator

50 Medical device with cuff

BEST MODE FOR CARRYING OUT THE INVENTION

[0017] The present invention is described in detail below.

First, prior to the description of the cuffed medical instrument indicator of the present invention, the cuffed medical instrument to which this indicator is attached will be described. FIG. 1 is a view showing a cuffed medical device to which the indicator 1 of the present invention is attached, and FIG. 2 is a view showing a conventional cuffed medical device.

In FIG. 1 and FIG. 2, reference numeral 50 denotes a general endotracheal tube as a cuffed medical device, and this cuffed medical device (intratracheal tube) 50 is a connector 6 that can be connected to an artificial respirator. 0, an injection part 70 for inflating the cuff, a tube 80 to be inserted into the patient's trachea, and a cuff (balloon) 90 for occluding the trachea.

The connector 60 is entirely cylindrical, and includes a first connection cylinder 61 for connection to a ventilator, a second connection cylinder 62 that is airtightly fitted to a tube body 81 described later, It is configured.

As shown in FIG. 2, the injection portion 70 is configured by a connecting tube 71 connected to a tube 80, a pilot balloon 72, a check valve 73, and a force. Pilot bar The rune 72 is a balloon-like object having openings on both sides, and is used to confirm the internal pressure of the cuff 90 communicating with the pilot balloon 72 by confirming its inflated state by appearance and touch as described above. is there. The check valve 73 is configured to allow air (fluid) to flow only from the side opposite to the pilot balloon 72 and not to escape from the pilot vano lane 72 side, and is connected to the syringe. As a result, it becomes an inflow port for inflowing air.

In the injection portion 70 having such a configuration, in particular, the internal pressure of the cuff 90 is examined (confirmed) by the appearance of the pilot balloon 72 and its tactile sensation. There was a problem that some experience was required.

Therefore, in the present invention, as shown in FIG. 1, the indicator 1 is connected to the connection tube 71. The indicator 1 includes a cuff side connection portion 2 connected to the connection tube 71, a cylindrical indicator body 3, and a syringe side connection portion 5 having a check valve (not shown). ing. The indicator 1 having such a configuration can easily confirm the internal pressure of the cuff 90 by visually recognizing an indicator body (not shown) in the indicator body 3. The details of the indicator 1 will be described later.

The tube 80 includes a tube body 81, a first hole 82 that penetrates the entire length of the tube body 81, a second hole 83 that penetrates a part of the tube body 81, and a tube body 81. The first opening 84 communicates the second hole 83 and the outside on the distal end side (patient side), and the second opening 85 communicates the second hole 83 and the outside on the other end side of the tube body 81. ing. Note that the connection tube 71 is hermetically bonded and fixed to the tube body 81 in the second opening 85.

[0022] The cuff 90 is a balloon-like one provided so as to cover the first opening 84, and both ends thereof are hermetically bonded and fixed to the outer surface of the tube body 81, so that the inside thereof is the first. 1 It communicates with the outside only through the opening 84. That is, the cuff 90 communicates with the second hole 83 and the connection tube 71 through the first opening 84.

Next, details of the indicator 1 will be described. The indicator 1 is an embodiment of the indicator for a cuffed medical device according to the present invention. As shown in FIG. 3, the cuff side connecting portion 2 connected to the connecting tube 71, a cylindrical indicator body 3, and the like. , Check valve 4 And a syringe-side connecting portion 5 that is provided.

[0024] As shown in Figs. 3 and 4, the cuff-side connecting portion 2 includes a cylindrical portion 2a in which the connecting tube 71 is inserted (or extrapolated) and connected to the connecting tube 71, and one end side of the cylindrical portion 2a. And a large-diameter cylindrical connecting tube 2c formed on the outer peripheral edge of the disk portion 2b and connected to the indicator body 3. As shown in FIG. 4, on the inner surface side of the disc portion 2b, that is, on the connecting tube 2c side, the cylindrical portion 6 protrudes around the opening 2d of the internal hole (not shown) of the cylindrical portion 2a. Is formed. The cylindrical portion 6 forms a part of a guide path, which will be described later, and is formed in a substantially triangular shape centering on the opening 2d, and an index body, which will be described later, is engaged with each side portion thereof. A notch 6a is formed for the purpose.

[0025] The indicator body 3 is made of a transparent resin such as polypropylene (PP), and thus the inside thereof is formed so as to be visible, and the whole functions as a window portion in the present invention. As shown in FIGS. 5, 6, 7, and 8, it has a substantially cylindrical shape with a space formed inside. The indicator body 3 has a connection end 3a formed on the peripheral edge portion on one side thereof to be inserted into the connection tube 2c of the cuff side connection portion 2 and connected to the center portion on the other side. A connecting tube 3b connected to the syringe-side connecting portion 5 is formed.

[0026] In addition, the indicator body 3 is formed with an internal hole 7 penetrating from the one side to the other side. This internal hole 7 forms a part of the guide path in the present invention, and as shown in FIGS. 6 and 7, the opening on the side of the connection end 3a is a cylinder formed in the disk portion 2b. Is formed in a substantially triangular shape substantially matching the shape of the internal hole of the shaped portion 6 (see FIG. 4), and the opening shape on the side of the connecting tube 3b is formed in a circular shape as shown in FIGS. ing.

Under such a configuration, the inner hole 7 and the inner hole of the cylindrical part 6 of the cuff side connecting part 2 are connected to the indicator body 3 as shown in FIG. Thus, as described later, a guide path 8 is constructed for introducing the fluid injected by the injection means to the cuff side connection portion 2 side as described later.

[0027] In addition, the indicator body 3 is formed with a plurality of indicator chambers 9, and in the present embodiment, three indicator chambers 9 are formed therein. These indicator rooms 9 have the above plan as shown in Fig. 6 and Fig. 7. It is a space that is arranged at equal intervals around the inner path 8 along the circumferential direction, and is a cylindrical space that opens to the disc portion 2b side of the cuff side connecting portion 2. The opening on the disk part 2b side is sealed by the disk part 2b, so that each index chamber is an independent space. In addition, on the wall surface of the indicator body 3 on the side of the connecting tube 3b, a communication hole 9a is formed for each index chamber 9 for communicating the index chamber 9 made of a space to the outside of the indicator body.

[0028] In addition, a slit 10 is formed between each of the index chambers 9 and the guide path 8 (inner hole 7) so as to communicate with each other. Each of the slits 10 is attached with an index body 11 as shown in FIG. Here, the slit 10 has a notch 10a formed in the indicator body 3 as shown in FIGS. 7 and 8, and a notch 6a in the cylindrical part 6 of the cuff side connecting part 2 shown in FIG. And formed.

[0029] As shown in Figs. 9 and 10, the indicator body 11 is a balloon-shaped member having a mouth portion 11a and a bag portion ib, and is made of a flexible resin (elastomer) or rubber. The bag portion l ib is formed so as to be inflatable / shrinkable. The opening 1 la of the indicator body 1 1 is composed of an opening 11c and a thick attachment portion l id that forms the periphery of the opening 11c, and the attachment portion 1 Id is locked to the slit 10, The indicator body 11 is attached in the indicator body 3.

[0030] That is, the indicator body 11 has its mounting portion id arranged in the guide path 8 (inner hole 7), the bag portion ib passing through the slit 10, and placed in the indicator chamber 9, In this state, since the space between the mounting portion 11 d and the inner wall surface of the guide path 8 is hermetically sealed by adhesion or welding, it is attached in the indicator body 3.

[0031] Based on such a configuration, the indicator body 11 communicates with the cuff 90 via a guide path 8 as described later. In addition, since the space between the mounting portion l id and the inner wall surface of the guide path 8 is hermetically sealed, a slit 10 that communicates between the guide path 8 and each index chamber 9 is formed by the index body 11. The guide path 8 and the indicator chambers 9 are hermetically separated from each other.

Further, these index bodies 11 are configured to have different degrees of expansion / contraction corresponding to the internal pressure of the cuff 90 communicating through the guide path 8. That is, in this embodiment, three The two indicator bodies 11 are formed with different thicknesses of the bag portions l ib, and thereby the degree of expansion according to the internal pressure, that is, the degree of expansion / contraction is different.

Specifically, the first indicator body 11 hardly swells in the range where the internal pressure of the cuff 90 is appropriate, and when the internal pressure of the cuff 90 exceeds the appropriate range, that is, the cuff 90 The film thickness is set so as to swell when over-swelled. The second indicator body 11 is formed with a film thickness set so that the internal pressure of the cuff 90 swells sufficiently in a proper range and does not swell with a sufficient degree of expansion when it is below the proper range. Yes. The thickness of the third indicator 11 is set so that the inner pressure of the cuff 90 swells sufficiently in the vicinity of the lower limit of the appropriate range, and hardly swells, for example, about half or less of this lower limit. Has been.

Based on such a configuration, the three indicator bodies 11 swell at different expansion / contraction degrees according to the internal pressure of the cuff 90. That is, when the internal pressure of the cuff is appropriate, the second index body 11 and the third index body 11 swell with sufficient expansion, and the first index body 11 hardly swells. Therefore, it can be seen that the internal pressure of the cuff is appropriate by visually observing the state in which only one of the index bodies is sufficiently expanded.

Further, when the internal pressure of the cuff 90 is excessive, all of the three indicator bodies 11 are sufficiently expanded, and it can be understood that the internal pressure of the cuff is excessive by visually checking such a state.

[0034] Further, when the internal pressure of the cuff 90 decreases and falls below the lower limit value of the appropriate range, at least the first index body 11 and the second index body 11 both have very small degrees of expansion, In addition, the third index body 11 also has an insufficient degree of expansion. Therefore, it can be seen that the internal pressure of the cuff is too low by visually confirming that all the three indicator bodies 11 are not sufficiently inflated.

In particular, when the internal pressure of the cuff 90 is excessive, by forming the third indicator 11 so as to swell and rupture, it can function as a safety valve.

In addition, in the present embodiment, it is preferable that each of these three indicator bodies 11 is configured to be identifiable. In the present embodiment, each indicator body 11 is configured to be identifiable by changing the color of each indicator body 11 individually. is doing. Specifically, the color of the first index body 11 is “red”, and the color of the second index body 11 is “blue”. The third indicator is colored “green”. In this way, if each of the three index bodies 11 can be identified, it is possible to recognize in advance which color index body 11 corresponds to the internal pressure of the cuff 90. Whether or not the internal pressure is appropriate can be determined more quickly and accurately.

The syringe-side connecting portion 5 is generally cylindrical as shown in FIGS. 3 and 4, and has a small-diameter portion 5a at one end thereof, and the small-diameter portion 5a is a connecting tube of the indicator body 3. It is fixed to the indicator body 3 by being inserted into 3b and connected here and hermetically sealed by adhesion or welding. With this configuration, the syringe-side connecting portion 5 has an internal hole 5b communicating with the internal hole 7 of the indicator body 3. As will be described later, the syringe-side connecting portion 5 has an injection means (not shown) such as a syringe connected to the internal hole 5b on the other end side. In the present embodiment, the inner hole 5b is formed in a tapered shape so that the diameter gradually decreases from the other end side toward the center.

[0037] Further, in the inner hole 5b of the syringe-side connecting part 5, a constricted part 5c for narrowing the inner diameter of the inner hole 5b is formed in the central part, and the reverse part is formed in the constricted part 5c. Stop valve 4 is provided.

The check valve 4 includes a valve body 12, a coil spring 13, and a fixed shaft 14. The valve body 12 includes a head portion 12a and a cylindrical shaft portion 12b. The head portion 12a is disposed on the narrow diameter portion 5a side of the narrowed portion 5c, and the shaft portion 12b passes through the narrowed portion 5c. Thus, it is arranged to extend on the side opposite to the small diameter portion 5a.

The inner surface of the head 12a (the surface facing the constricted portion 5c) is tapered such that the diameter gradually decreases toward the shaft portion 12b, and the surface of the constricted portion 5c facing the inner surface is also the inner surface. It has a reverse taper shape corresponding to the taper shape. With such a configuration, the head portion 12a of the valve main body 12 comes into tight contact with the stenosis portion 5c when contacting the stenosis portion 5c.

[0038] The coil spring 13 is provided on the outer side of the shaft portion 12b passing through the narrowed portion 5c.

The fixed shaft 14 is composed of a head portion 14a and a shaft portion 14b, and the shaft portion 14b is press-fitted into the inner hole of the shaft portion 12b of the valve body 12 so as to be connected thereto. The coil panel 13 is held in a compressed state between the portion 5 c. With this configuration In the normal state where the head 14a side of the fixed shaft 14 is not pressurized, the check valve 4 is pulled by the head 12a of the valve body 12 toward the constriction 5c side by the urging force of the coil panel 13. The inner surface of the portion 12a and the constricted portion 5c are in close contact with each other in an airtight manner. On the other hand, when the head 14a side is pressurized (pressed) with a force larger than the urging force of the coil spring 13 by a syringe or the like, the head 12a of the valve body 12 is separated from the constricted portion 5c and is opened.

[0039] A groove 14c is formed in the head 14b of the fixed shaft 14. As will be described later, when the injection port of the syringe comes into contact with the head portion 14b, the groove portion 14c does not close the injection port with the head portion 14b, and at least the groove portion 14c is used to connect the inside of the injection port to the syringe side. This is for communicating with the internal hole of the connecting portion 5.

In order to assemble the indicator 1 having such a configuration, as shown in FIGS. 3 and 4, first, the side of the indicator body 3 where the indicator chamber 9 is opened (the side where the cylindrical portion 6 is formed) Insert the indicator body 11 into the indicator room 11 from the opposite side. That is, the attachment portion l id is inserted into the inner hole 7 (guide path 8), and the bag portion l ib is inserted into a notch (not shown) that becomes the slit 10, and in this state, the attachment portion l id and The space between the injection hole 7 (guide path 8) forming the notch is hermetically sealed.

[0041] Next, the cuff-side connecting portion 2 is joined to the indicator body 3 to which the indicator body 11 is attached on the side where the indicator chamber 9 is opened. At that time, the notch 6a of the cylindrical portion 6 of the disc portion 2b is inserted into the bag portion ib of the indicator body 11, and the cylindrical portion 6 is directly inserted into the peripheral portion of the inner hole 7 of the indicator body 3. At the same time, in this state, the cuff side connection part 2 is hermetically sealed to the indicator body 3.

After that, the indicator 1 is obtained by inserting the small diameter portion 5a of the syringe side connection portion 5 into which the check valve 4 is previously incorporated into the connection cylinder 3b of the syndicator body 3 and sealing hermetically.

[0042] Next, a method of using the cuffed medical device (intratracheal tube) 50 including the indicator 1 having such a configuration will be described.

As shown in FIG. 11, first, the cuffed medical device 50 is used for a patient in accordance with a normal usage method. That is, the distal end side of the tube 80 is inserted from the mouth 100 of the patient, and the cuff 90 reaches the trachea 101.

Next, a syringe (not shown) is connected to the syringe-side connecting portion 5 of the indicator 1. Snow That is, the distal end side of the syringe is put into the inner hole, and the head portion 14a of the fixed shaft 14 of the check valve 4 is pressed by the distal end portion. Then, the head 14a is pushed against the urging force of the coil spring 13, whereby the head 12a of the valve body 12 is separated from the constricted portion 5c, and both sides of the constricted portion 5c communicate with each other to open the check valve 4. It becomes a state.

[0044] Under such a state, the syringe is operated to inject a predetermined amount of air.

Then, the injected air passes through the narrowed portion 5c, passes through the internal hole, and flows into the guide path 8 (internal hole 7) of the indicator body 3. Then, the air that has passed through the guide path 8 reaches the inside hole of the cuff side connecting portion 2, and further passes through the inside of the connecting tube 71 connected to the cuff side connecting portion 2 and the inside of the second hole 83 of the tube 80. Through the first opening 84 force, into the cuff 90. By injecting air in this way, the cuff 90 expands to a degree of expansion corresponding to its internal pressure.

When air is passed through the guide path 8 in this way, a part of the air flows into the bag portion 11 b through the opening portion 11 c formed in the attachment portion 11 d of the indicator body 11.

[0045] When air is injected in this manner, the syringe is removed from the syringe-side connecting portion 5. Then, the fixed shaft 14 of the check valve 4 is urged by the coil panel 13 by the release of the pressing force and moves. As a result, the valve body 12 is also pulled toward the constricted portion 5c, and the check valve 4 is closed when the inner surface of the head portion 12a and the constricted portion 5c are tightly adhered.

When the check valve 4 is closed in this way, the cuff 90 becomes a space closed with respect to the atmosphere side by the airtight blockage of the connecting tube 71 side by the indicator 1. Since the opening 11c of the index body 11 in the index chamber 9 communicates with the index body 11 via the guide path 8, the internal pressure of the cuff 90 is applied to the index body 11. At this time, since the index chamber 9 communicates with the atmosphere (outside) through the communication hole 9a, each of the index chambers 9 corresponds to the pressure difference between the internal pressure of the cuff 90 and the atmospheric pressure, that is, corresponding to the internal pressure of the cuff 90. The indicator body 11 inflates the bag portion l ib.

[0047] At that time, the plurality of indicator bodies 11 are configured to have different degrees of expansion / contraction corresponding to the internal pressure of the cuff 90 as described above. By visually checking the degree, as described above, it is possible to quickly reduce the internal pressure of the cuff 90 and to accurately determine the force.

[0048] When the internal pressure (expansion degree) of the cuff 90 is confirmed in this way, the internal pressure is within an allowable range. If it is below the minimum value, the cuff 90 can be inflated at a predetermined internal pressure by connecting the syringe again and injecting air. Even when air is injected with a syringe in this way, the force 90 can be expanded without excess or shortage by checking the degree of S crimp of each index body 11.

Thereafter, artificial respiration is performed by a ventilator (not shown) connected to the connector 60 of the cuffed medical device (intratracheal tube) 50.

[0049] As described above, the indicator 1 is configured such that the plurality of index bodies 11 in the index chamber 9 communicating with the cuff 90 are expanded at different degrees of expansion / contraction according to the internal pressure of the cuff 90. It is made. Therefore, by visually observing the degree of expansion / contraction of each of the plurality of index bodies 11, it is possible to quickly determine a decrease in the internal pressure of the cuff and accurately determine the force. Therefore, there is no inconvenience when it takes a labor force S to detect a decrease in internal pressure as in the past, or when a certain amount of experience is required, and an unexpected accident can be reliably prevented.

[0050] In addition, since the indicator body 3 is formed of a transparent resin and functions entirely as a window portion that can be seen through the inside, the degree of expansion / contraction of each indicator body 11 can be easily and quickly performed. Can be confirmed. Furthermore, since each index body 11 is configured to be identifiable by changing the color, by identifying in advance which color index body 11 corresponds to the internal pressure of the cuff 90, Whether or not the internal pressure of cuff 90 is appropriate can be determined more quickly and accurately.

[0051] It should be noted that the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the gist of the present invention. For example, if the shape and structure of the indicator body can be expanded and contracted corresponding to the internal pressure of the cuff 90, and the expansion and contraction degree can be easily visually recognized from the outside, it is adopted in addition to the embodiment described above. Is possible.

In the above-described embodiment, the degree of expansion / contraction of each index body corresponding to the internal pressure of the cuff is made different by changing the thickness of the bag portion of each index body. For example, the material of each index body is changed. By doing so, the degree of expansion / contraction may be made different from each other.

[0052] Furthermore, in the above-described embodiment, three index bodies are provided, but there may be two or four or more.

In addition, as a method of configuring each index body so as to be identifiable, a method for changing the color of each index body is not limited. In addition, it is possible to apply a method in which patterns, numbers (characters), etc. are provided on the surface of the bag or the like.

[0053] Also, the structure of the check valve 4, the structure of the guide path 8 for communicating the check valve 4 side and the cuff 90 side, and the like are not limited to the structure of the above-described embodiment, and various forms are possible. Can be adopted.

Furthermore, in the embodiment, the cuffed medical device to which the present invention is used can be applied to various devices such as a pulmonary artery balloon catheter in addition to the endotracheal tube.

Industrial applicability

[0054] According to the indicator for a medical device with a cuff of the present invention, by visually observing the degree of expansion of each of the plurality of index bodies from the window portion of the indicator body, the internal pressure of the cuff is quickly reduced and the force is accurately determined. can do.

Claims

The scope of the claims

[1] A cuffed medical device indicator attached to a cuffed medical device and indicating an internal pressure of the cuff of the medical device,

An indicator main body provided between the check valve and the connecting portion, and the fluid injected through the check valve by the injection means into the indicator main body. A guide path that guides to the side, and an indicator chamber that communicates with the outside of the indicator body and is hermetically separated from the guide path,

In the indicator chamber, a plurality of balloon-like indicator bodies that communicate with the inside of the cuff through the connecting portion are provided so as to be inflatable and inflatable corresponding to the internal pressure in the cuff,

The plurality of indicator bodies are configured with different degrees of expansion / contraction corresponding to the internal pressure of the cuff,

The indicator for a medical device with a cuff, wherein the indicator main body is formed with a window portion that allows at least the degree of expansion / contraction of each of the plurality of index bodies to be visually recognized.

[2] The medical device with a cuff according to claim 1, wherein each of the plurality of indicator bodies has a mouth portion that opens into the guide path so that the inside thereof communicates with the cuff through the guide path. Indicator.

[3] The cuffed medical instrument indicator according to claim 1 or 2, wherein each of the plurality of indicator bodies is configured to be identifiable.