JPS59183730A - Temperature detecting apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a temperature detection device, and more specifically, to a temperature detection device suitable for detecting the temperature of the inner wall of a narrow passage, such as a living body cavity or a deep part of a complicated duct of a device. Pertains to.

Japanese Patent Publication No. 53-11157 discloses a device for measuring the temperature within a living body cavity, for example, the temperature distribution of the stomach wall, which is configured to be inserted into the stomach through an endoscope, and which is configured to be inserted into the stomach through an endoscope. A technique is disclosed in which a temperature detection element is provided at the tip of a pressure measurement probe configured to protrude.

However, with this device, the temperature detection element is attached to the tip of the probe in a protruding state, making it difficult to insert it smoothly into narrow passages, and the temperature detection element being fixed to the temperature-measuring area. It is difficult to arrange the temperature detection element, and there is a risk that the position of the temperature detection element may shift during temperature measurement.

The present invention has been made in view of the above-mentioned points, and an object of the present invention is that even if the temperature detected part is located at the back of a narrow passage of the pipe, the temperature of the part to be detected is The temperature sensing element can be easily inserted into the inside, the humidity sensing element can be installed in the detected part, and the temperature sensitive element can be fixed to the detected part of the pipe wall, and the temperature of the detected part can be reliably detected. The object of the present invention is to provide a temperature detecting device that can detect temperature.

According to the present invention, a hollow body made of an elastic membrane is provided at one end of a tubular body and is configured to be inflated by fluid introduced from the other end of the tubular body. ,
A3 provided on the outside of the hollow body is a flexible container configured to deform following the deformation of the hollow body, and a flexible container configured to deform in accordance with the deformation of the hollow body, and to be displaced away from the tubular body as the container deforms. This is preferably achieved by a temperature sensing device comprising a humidity sensing element housed in a housing.

Next, preferred embodiments of the present invention will be explained with reference to the drawings.

FIG. 1 is an explanatory diagram schematically showing an example of measuring the temperature of the inner wall of the cage organ 4 of a bovine body 3 with a thirst measuring instrument 2 using the temperature detecting device 1 of the present invention.

In the device 2 shown in FIG. 1, 5 is a hollow tube, 6 is a hollow body made of an elastic membrane, and I is a temperature sensing element structure in which a temperature sensing element 8 as a temperature sensing element is enclosed in a container 9. body, 10 is a temperature measuring element 8
A temperature indicator 11 for displaying the detected temperature at 11 sends a fluid ('a body or gas) into the hollow body 6 through the hollow tube 5 to inflate the hollow body 6, and discharges the fluid from the hollow body 6. This is a fluid supply/discharge device such as a pump configured to deflate the hollow body 6. 8a is a lead wire of the temperature measuring element 8.

In the device 2, with the hollow body 6 deflated, the tube 5 is inserted into the lumen 4 from the tip 2a through the mouth 12, which is the inlet of the lumen 4, in the G direction, and the inner wall of the lumen 4 is When the temperature measuring element 8 reaches the vicinity of the non-temperature measuring part 13, the hollow body 6 is inflated, temperature measurement is performed with the temperature measuring element 8 being substantially closely and fixed to the temperature measuring part 13, and the hollow body 6 is inflated. After the body 6 is deflated, it is removed from the lumen 4.

Note that the device 2 is used, for example, as shown in FIG. 2, for example, as shown in FIG.
6 can also be applied to temperature measurement. 18 is an insertion port for the tube 5.

Next, details of the temperature detection device 1 as a preferred example of the present invention will be explained based on FIG.

In FIG. 3, the hollow tube 5 serving as the insertion conduit has one end 19
It is connected to a fluid supply/discharge device 11 (not shown) as a means for expanding and contracting the hollow body 6 on the side,
It also works as a fluid supply and discharge pipe. The tube 5 has a bent insertion path 4
．． It is made of a flexible polymeric material such as soft polyvinyl chloride or silicone resin so that it can be inserted into 15 or the like. The other end 20 of the tube 5 is sealed with an end frame 21. 5 one end of tube 5? A fluid supply/discharge hole 22 is provided on the 0 side.

A tubular hollow body 6 made of an elastic membrane material such as natural or artificial rubber or silicone rubber is attached to cover the outer periphery of the tube 5 near the supply/discharge hole 22.
For example, the attachment to the hollow tube 5 is carried out at both ends 2 of the tubular hollow body 6.
3.24 to the outer periphery of the tube 5, but the hollow body 6 made of an elastic membrane and the tube 5 may be integrally molded in advance.

After inserting the device 1 into the lumen 4, 15, etc. by a method such as a shed, enteral or tube, air is supplied, for example, in the Δ direction from the end 19 side of the tube 5 located outside the lumen 4 or 15. When this is done, gas flows into the hollow body 6 through the holes 6, and the hollow body 6 begins to expand. When the air supply is continued, the hollow body 6 continues to inflate.
It is in contact with and fixed to the target temperature measurement site 13°, 16, etc. within the R line. Incidentally, it is preferable that the device 1 is introduced into the temperature measurement target site under the supervision of an endoscope or the like. At this time, for example, by closing a valve, the pipe 5 is occluded and air supply is stopped. When removing the device 1 from the lumen 4, 15, etc. where the temperature measurement target site 13, 16, etc. is located, the operation opposite to the above is performed. That is, the hollow body 6 is contracted by evacuation from the end 19 in the direction B, and after the hollow body 6 returns to its original position, the device 1 is moved into the lumen 4.
All you have to do is remove it from the 15th mag. Incidentally, it is not necessary to use a forced air means such as a pump for evacuation. For example, by opening a valve, the end 19 of the pipe 5 is opened to the atmosphere, etc., and the contraction force of the elastic hollow body 6 is used. The gas inside the hollow body 6 may be exhausted.

At the periphery of the hollow body 6, there is a temperature measuring element structure 7 incorporating a temperature measuring element 8 consisting of a temperature sensor such as a thermocouple or a thermistor.
is provided. As described in detail below, this structure 7 is configured to reversibly deform and cover the expansion and contraction deformation of the hollow body 6, and as the hollow body 6 expands, the temperature measuring element 8 5 and is displaced outward in the radial direction of the tube 5 so as to be spaced apart from the temperature measurement target portion 13, 16, etc.
Fixed. A lead wire 8a for the temperature measuring element 8 is connected to a temperature indicator 10 (not shown) and extends inside the tube 5 toward the end 19 by passing through the peripheral wall of the tube 5. Note that this lead wire 8a may be made to run along the outer wall of the tube 5.

Next, details of the first specific example of the temperature measuring element structure 25 of the temperature measuring element structure 7 of the temperature detecting device 1 will be explained based on FIG. 4.

In FIG. 4, the temperature measuring element structure 25 includes a temperature measuring element 8, a tubular temperature measuring element covering 26 that covers the temperature measuring element 8 and the lead wire 8a, and a seal of the covering 26 from one end 27. Is the toe 28 31'? It is freely inserted, and the covering body 26
It consists of a tubular support body 29 having an inner diameter larger than the outer diameter of the tube. The end 28 side of the covering 26 is the end 2 of the support 29
The cross-sectional shapes of the covering body 26 and the support body 29 may be circular, oval, or rectangular as long as they are engaged or fitted together so that they can move forward and backward in the C and D directions on the 7 side. Further, the inner diameter of the cover 26 may be made larger than the outer diameter of the support 29, and the support 29 may be fitted into the cover 26. Support body 29
does not have to be completely tubular; for example, the peripheral wall may be cut out along its longitudinal direction. Furthermore, the covering body 26
The tip @2B may be connected to the inner wall of the support body 29 by an elastic linear body or the like in an expanded state. At least one of the temperature measuring element cover 26 and the support 29 is preferably made of a flexible and elastic material.
If a has elasticity, it may be a material that has little elasticity, such as Teflon.

It is made of a highly visible material such as nylon. Support body 29
One end 30 is fixed to the outer wall of the tube 5 by adhesive or the like, and the covering 26 airtightly penetrates the peripheral wall of the tube 5 and is fitted into the tube 5 around this penetration part 31 by adhesive or the like. .

The ends 27, 30 etc. of the support 29 are preferably connected to the structure 25.
It is beveled and rounded so as not to get caught on the walls of the lumens 4, 15, etc. when inserted or removed. In the following, a visible container is provided outside the hollow body 6 and is configured to deform in accordance with the deformation of the hollow body 6, and is composed of a covering body 26 and a support body 29.

In the temperature measuring element structure 25 configured as described above, when the hollow body 6 contracts, the end portion 28 of the covering body 26 is deeply inserted into the support body 29 in the C direction, and the covering body 26 and the support body 29 are It is almost parallel to the tube 5 and substantially in contact with the tube 5. Insertion and removal of the structure 25 may be performed in this state in which the structure 25 has a reduced diameter. On the other hand, when the hollow body 6 is expanded and flooded, the end portion 28 of the covering body 26 is displaced in the direction of coming out from the support body 29, and the housing body consisting of the covering body 26 and the support body 29 follows the deformation of the hollow body 6. and transform. During this time, the temperature measuring element 8 is not displaced with respect to the covering body 26. Note that the temperature measuring element 8 may be displaced with respect to the covering body 26.

By selecting the position of the temperature measuring element 8 within the covering body 26 in advance depending on the deformation period of the hollow body 6 and the movement period of the covering body 26 relative to the support body 29, the temperature measuring element 8 can be placed exactly in the hollow body. It can be positioned at the most protruding part 32 of the body 6, and the temperature measurement element 8 can be fixedly positioned at the temperature measurement target site 13, 16, etc.

Depending on the position of the parts 13, 16, etc., the temperature measuring element 8 may be positioned so that it is located on the part 32a side in front of the part 32, or on the part 32b side further back than the part 32. You may select it.

In the device 1, the outer diameter of the tube 5 can be set arbitrarily as long as the diameter of the entire outside including the temperature sensing element structure 25 when the hollow body 6 is contracted is smaller than the minimum diameter of the insertion path 4°15. That's fine.

Further, the length of the tube 5 may be arbitrary as long as it is longer than the length of the path 4 or 15 from the insertion port 12 or 18 to the target site 13 or 16. The size of the hollow body 6 is determined depending on the inner diameter of the lumen 4° 15 etc. where the target site 13, 16 etc. is located and the expansion performance of the hollow body 6. Although the outer diameters of the covering body 26 and the support body 29 are arbitrary, it is preferable that they be as thin as possible so that the attachment 1 can be easily inserted and removed. In addition, in order to reduce the temperature error and improve the responsiveness of temperature measurement,
It is preferable to keep the wall thicknesses of the surrounding walls of the covering body 26 and the support body 290 small.

In addition, at least a portion of the temperature sensing portion of the temperature sensing element 8 is exposed substantially flush with the outer surface of the peripheral wall of the covering 26 so that the temperature sensing portion of the temperature sensing element 8 is substantially in contact with the temperature measurement target portion 13, 16, etc. It's okay,
In addition, a window made of a metal piece or the like with small heat capacity and low thermal conductivity is installed in a part of the peripheral wall of the covering 26. The inner surface may be in contact with the temperature-sensing portion of the temperature-measuring element 8 within the covering body 26 .

Furthermore, if a heat insulating material such as urethane is placed in the part of the temperature measuring element 8 on the hollow body 6 side, the influence of the temperature of the fluid in the hollow body 6 can be reduced, and the temperature of the temperature measurement target part 13.16 can be further reduced. Can be measured accurately.

In addition, when the penetrating portion 31 of the sheath 26 is slidably penetrated through a hole in the peripheral wall of the tube 5, or when the sheath 26 is made movable in the longitudinal direction along the outer surface of the tube 5, for example, The part of the covering body 26 where the temperature measuring element 8 is located is the part 3 of the hollow body 6.
It may also be fixed to a desired location such as No. 2.

FIG. 5 shows a temperature measuring element structure 33 of a second specific example. In addition, the same reference numerals are attached to the same members or parts in the structure 33 as in the structure 25.

In the structure 33, 34 is an elastic support line made of a stretchable or elastic material such as rubber, and this elastic support line 34 has one end 35 fixed to the outer wall of the tube 5, and the other end 36.
and is fixed to the rounded, beveled sealing end 28 of the sheathing 26.

The temperature measuring element structure 33 is connected to the support wire 3 when the hollow body 6 contracts.
Due to the contraction force of 4, the entire tube 5 assumes a linear shape along the outer surface. When the hollow body 6 is expanded by fluid pressure, the covering 26 deforms following the expansion and deformation of the hollow body 6, but the temperature measuring element 8 is almost pressed against the hollow body 6 due to the tension of the support wire 34. In this state, the hollow body 6 is displaced radially outward together with the hollow body 6.

Note that it is preferable that the elastic support line 34 be as thin as possible so as not to interfere with insertion and removal. The tension of the support wire 34 is selected to be strong enough to hold the covering 26 and weak enough not to significantly hinder the expansion of the hollow body 6. The temperature measuring element 8 is positioned so that it is located exactly opposite the portion 32, for example, when the hollow body 6 is expanded to a predetermined size.
It is housed within the covering 26.

FIG. 6 shows a temperature measuring element structure 36 of a third specific example. In this structure 36, the same reference numerals are given to the same members or parts as in the structures 25 and 33.

In the structure 36, 37 is a tubular support whose both ends are beveled at 38 and 39, and which is fixed to the portion 32 of the hollow body 6 at the outer surface 40 of the central part, and the ends of the tubular support 37 are A covering body 26 is inserted into the 38 side so as to be movable forward and backward in the F and F directions. The tubular support 37 is further penetrated by a stretchable or elastic support wire 43 which is fixed at both ends 41, 42 to the outer wall of the tube 5. The distance between the ends 41,42 is greater than the natural length of the support 37. In this example, the temperature measuring element 8 protrudes from the end 28a of the covering body 26, but the temperature measuring element 8 may be positioned within the covering body 26 if there is no problem with temperature measurement.

When the hollow body 6 contracts, the temperature measuring element structure 36 assumes a linear shape along the surface of the tube 5 as a whole due to the contraction force of the support wire 43. As the hollow body 6 expands, the support body 37
When the covering body 26 is deformed and the hollow body 6 expands to a predetermined size, the temperature measuring element 8 is displaced in the F direction with respect to the support body 37 due to the tension accompanying the expansion of the elastic support line 43. Draw a predetermined shape so that it is in a position facing the part 32. When the hollow body 6 contracts, the structure 36 deforms in the reverse process to the above and returns to its original shape.

Note that the above specific examples are some preferable examples for explaining the present invention, and the present invention is not limited to these. For example, the hollow body 6 may have a cylindrical top (a radial protrusion) as shown in FIGS. 7 and 8, instead of having the circular top 32 when expanded.

FIGS. 7 and 8 are examples of an intracavity heating probe 44 in which the device of the present invention is combined with a device that uses electromagnetic waves to heat a living body.

In FIG. 7 and FIG. 8, 45 is a cylindrical electrode;
is installed on the outer cylindrical tube 46 and connected to one output terminal of a high frequency power source (not shown) via an electrode lead wire 48 in the inner cylindrical tube 47. Inner tube 47 and outer tube 46
The pipe also functions as a water pipe and a drain pipe, as described below. The electrode structure 44 as an intraluminal heating probe is desirably flexible so that it can be easily inserted into and expanded into the target hollow organ during biological treatment. Rubber as 46.

It is preferable to use one made of a polymeric material such as soft vinyl chloride or silicone, and a flexible one made of metal foil, a metal wire assembly made of copper or the like as the electrode 45.

One end of the outer cylindrical tube 46 is sealed with an end frame 49, and a plurality of water holes 50, 51, 52, 53 are bored in the peripheral wall of the outer cylindrical tube 46 in the vicinity of the electrode 45. 54 is a bag-like body as a hollow body made of a stretchable polymer thin film;
Its both ends are glued to the outer cylindrical tube 46 and the end frame 49. The hollow body 54 has a large number of fins 54a extending along its longitudinal direction on its outer surface.

55 is another hollow body made of the same material as the hollow body 54 and placed over the hollow body 54. Note that a large number of longitudinal fins may be provided on the inner surface of the hollow body 55, or a large number of longitudinal fins may be provided only on the inner surface of the hollow body 55. The hollow body 55 is also fixed to the outer wall of the outer tube 46 and the end frame 49 at both ends thereof. 49a is a retaining ring that fixes one end of the hollow body 54, 55, and 49b is the hollow body 5.
This is a retaining ring that fixes the thin end of 5. The temperature measuring element 8 of four trees is H, J between the hollow bodies 54 and 55 and between the fins 54a.
The lead wires 8a are arranged so as to be movable in the direction.
are connected to respective temperature indicators (not shown) via. 56 is a cladding tube. The housing body consisting of the hollow body 55 and the outer wall surface of the hollow body 54 is deformed following the expansion/contraction deformation of the hollow body 54, and avoids displacing the temperature measuring element 8 in the radial direction.

Note that the hollow body 55 may be formed into a thin tubular shape, and in this case, a part of the outer surface of the tubular hollow body 55 in the longitudinal direction is
It may be fixed to the outer surface of 4.

After injecting this electrode structure 44 into the target hollow organ, when water is passed in the direction through the inner tube 47, the inner and outer tubes 4
7. From the water passage hole 51.53 on the right side of the sealing plug 57 made of silicone sealing material provided between Water flows out and the hollow bodies 54 and 55 begin to expand. When water continues to flow further, the hollow bodies 54, 55 expand until they come into contact with the wall of the hollow organ. After that, excess water is drained from the electrode 45 or the outer cylindrical pipe 4 through the water passage hole 50.52 on the left side of the sealing plug 57.
It flows into the outer tube 46 through the gap between 6 and 6, and is discharged in the direction B through the outer tube 46.

This water flow has three effects. First, the temperature measurement element 8 can be displaced radially outward to be brought into close contact with and fixed to the temperature measurement target region 13 or the like. Second, by filling the gap between the electrode 45 and the wall of the luminal organ with water having an electrical constant (electrical conductivity and permittivity) close to that of the bovine body, for example, power loss due to the gap is reduced;
Perform more effective high-frequency heating of the affected area. Thirdly,
Since the electric field strength is strongest at the surface of the electrode 45, the area near the electric field 45 is heated extremely strongly and there is a risk of causing burns. can be prevented from occurring. In addition, above 3
In addition to water, the circulating fluid may be a conductive liquid such as saline, or may be a gas such as nitrogen or carbon dioxide depending on the platform.

In addition, the outer diameter of the electrode structure 44 can be selected as long as it is smaller than the inner diameter of the target hollow organ, and the length of the electrode 45 can be selected according to the length of the target heated area. good.

Since this intracavity heating probe 44 uses high frequency, at least one other electrode is used as a counter electrode when using it. Alternatively, a different type may be provided outside the living body, such as on the outside of the living body.

In addition, instead of the high frequency electrode 45, or together with the electrode 45, a microwave transmitting electrode or an antenna may be provided in the outer tube 46 or the like.

As described above, the temperature detection device of the present invention includes a hollow body made of an elastic membrane, which is installed at one end of the tubular body and is configured to be inflated by fluid introduced from the @ end side of the tubular body. , a flexible container is stepped on the outside of the hollow body and is configured to deform according to the deformation of the hollow body, and a flexible container configured to separate from the tubular body as the container deforms. Since the sensor is equipped with a temperature-sensing element housed in a container so as to be able to be displaced to Even if the device is located deep inside the equipment, it is possible to insert a temperature-sensitive element into the pipeline where the detected part is located, place the temperature-sensitive element in the detected part, or place the temperature-sensitive element in the pipeline where the detected part is located. The temperature element can be easily fixed and the temperature sensing element etc. can be easily removed from the conduit, and the temperature of the detected part can be reliably detected or measured.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of an example of measuring the temperature of the inner wall of a living body's lumen using a temperature measuring device to which the temperature detection device of the present invention is applied, and FIG. 2 is an explanatory diagram of an example of a pipe to which the device of the present invention is applied. FIG. 3 is an explanatory diagram of a preferred embodiment of the temperature detection device according to the present invention, and FIGS. 4 to 6 are explanatory diagrams of three examples of temperature sensing element structures of the device in FIG. 3. FIG. 7 is an explanatory diagram of a biological heating probe to which a temperature detection device as an integral example of the present invention is applied, and FIG. 8 is an explanatory diagram of a cross section taken along the line ■-■ in FIG. 7. 5.46...Pipe, 6,54...Hollow body, 8
...Temperature measuring element, 9,55...Medium compact, 26
..... Covering body, 29.37 .... Tubular support body, 34, 43 ..... Stretchable support wire. 23- “0 ward ward lie dumbfounded
Taste 179-kuqfudashi

Claims (1)

[Scope of Claims] A hollow body made of an elastic membrane, which is disposed at one end of a tubular body and configured to be inflated by fluid introduced from the narrow end of the tubular body; a flexible container configured to deform following the deformation of the hollow body; and a flexible container configured to be displaced away from the tubular body as the container deforms. A temperature sensing device comprising a temperature sensing element housed in the body.