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WO2005089847A1 - Tube a soufflet pour cuircuit de respiration - Google Patents

Tube a soufflet pour cuircuit de respiration Download PDF

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Publication number
WO2005089847A1
WO2005089847A1 PCT/JP2005/004957 JP2005004957W WO2005089847A1 WO 2005089847 A1 WO2005089847 A1 WO 2005089847A1 JP 2005004957 W JP2005004957 W JP 2005004957W WO 2005089847 A1 WO2005089847 A1 WO 2005089847A1
Authority
WO
WIPO (PCT)
Prior art keywords
rib
tube
hot water
flow path
electric wire
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2005/004957
Other languages
English (en)
Japanese (ja)
Inventor
Kazufuku Nitta
Keiichi Miyamoto
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Metran Co Ltd
Original Assignee
Metran Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Metran Co Ltd filed Critical Metran Co Ltd
Publication of WO2005089847A1 publication Critical patent/WO2005089847A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators; Tracheal tubes
    • A61M16/10—Preparation of respiratory gases or vapours
    • A61M16/1075—Preparation of respiratory gases or vapours by influencing the temperature
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators; Tracheal tubes
    • A61M16/08—Bellows; Connecting tubes ; Water traps; Patient circuits
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators; Tracheal tubes
    • A61M16/10—Preparation of respiratory gases or vapours
    • A61M16/1075—Preparation of respiratory gases or vapours by influencing the temperature
    • A61M16/1095—Preparation of respiratory gases or vapours by influencing the temperature in the connecting tubes
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/36—General characteristics of the apparatus related to heating or cooling
    • A61M2205/3653—General characteristics of the apparatus related to heating or cooling by Joule effect, i.e. electric resistance
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/36—General characteristics of the apparatus related to heating or cooling
    • A61M2205/366—General characteristics of the apparatus related to heating or cooling by liquid heat exchangers

Definitions

  • the present invention relates to a flexible tube for a breathing circuit.
  • Fig. 1 shows an example of a conventional breathing circuit (artificial respirator).
  • This breathing circuit also includes a pump device 1, a breathing tube 2, a mouthpiece (so-called Y-piece) 3, and a force.
  • the respiratory tube 2 includes an inspiratory tube 2a and an expiratory tube 2b.
  • the intake air sent from the pump device 1 can be supplied to the subject via the intake pipe 2a and the mouthpiece 3.
  • the exhaled breath from which the subject's power has also been sent out is collected by the pump device 1 via the mouse piece 3 and the exhalation tube 2b.
  • Various serpentine tubes are used as the inhalation tube 2a or the expiration tube 2b.
  • the intake air sent from the pump device 1 is usually adjusted to a temperature of 35 ° C and a humidity of 100%.
  • the exhaled breath delivered from the subject is usually at a temperature of 37. C, humidity 100%.
  • the water traps 4 are attached to the middle of the inhalation tube 2a and the middle of the expiration tube 2b, respectively.
  • the water trap 4 has a flow path for discharging water in the pipe to the outside.
  • Patent Document 1 JP-A-6-23051
  • the present invention has been made based on the above circumstances, and an object of the present invention is to provide a coiled pipe (breathing pipe) for a breathing circuit that can realize low cost while maintaining safety. .
  • a flexible tube includes an inner tube, an outer tube, a first rib, and a second rib.
  • the inner tube is inserted inside the outer tube and extends in substantially the same direction as the outer tube.
  • the first rib and the second rib are disposed between the inner pipe and the outer pipe, and are circulated to form two spirals.
  • a first flow path and a second flow path are formed between the inner pipe and the outer pipe by the turned first and second ribs. The first flow path and the second flow path are connected so that the fluid flowing in one of them returns from the other.
  • a heating wire may be arranged on the first rib or the second rib.
  • the heating wire may include a first wire body and a second wire body.
  • the first wire may be arranged on one of the first rib and the second rib, and the second wire may be arranged on the other.
  • the first electric wire and the second electric wire may be electrically connected to each other near the end of the inner cylinder or the outer cylinder.
  • a heating wire is arranged on one of the first rib and the second rib, and a thermocouple is placed on the other.
  • thermocouple may be arranged on the first rib or the second rib.
  • the electric wire may be arranged inside the first rib or the second rib.
  • thermocouple may be arranged inside the first rib or the second rib.
  • a breathing circuit according to the present invention includes any one of the above-described flexible tubes.
  • the flexible tube of the present embodiment includes an inner tube 10, an outer tube 20, a first rib 30, a second rib 40, and a first flow path.
  • the material of the inner pipe 10, the outer pipe 20, the first rib 30, and the second rib 40 is, for example, polyethylene force.
  • the inner tube 10 and the outer tube 20 are both formed in a cylindrical shape.
  • the inner tube 10 has a smaller diameter than the outer tube 20 and is inserted inside the outer tube 20.
  • the inner pipe 10 is substantially coaxial with the outer pipe 20.
  • the inner pipe 10 extends in substantially the same direction as the outer pipe 20.
  • a gap is formed between the inner pipe 10 and the outer pipe 20.
  • the first rib 30 and the second rib 40 are arranged between the inner pipe 10 and the outer pipe 20, and are circulated so as to form two spirals.
  • the first ribs 30 are indicated by white circles
  • the second ribs 40 are indicated by black circles
  • their extended states are indicated by broken lines.
  • the first rib 30 and the second rib 40 are parallel. In other words, the interval between them is constant.
  • the first rib 30 and the second rib 40 have a substantially circular cross section in this embodiment.
  • the first rib 30 and the second rib 40 thus circulated form a first flow path 50 and a second flow path 60 between the inner pipe 10 and the outer pipe 20. Therefore, the first flow path 50 and the second flow path 60 also circulate between the inner pipe 10 and the outer pipe 20 so as to form two spirals.
  • the first flow path 50 and the second flow path 60 are communicated with each other such that the fluid flowing in one of them returns from the other.
  • the end of the first flow path 50 (the right end in FIG. 2)
  • the force is connected to the end of the second flow path 60 (the right end in FIG. 2), and is configured to return the sent fluid.
  • the end faces of the inner cylinder 10 and the outer cylinder 20 (the right end faces in FIG. 2) are closed so that the hot water does not leak out.
  • the electric wire 70 includes a first electric wire 71 and a second electric wire 72 (see FIGS. 3 and 4). Each of these electric wires 71 and 72 is made of a conductor (for example, a -chrome wire) that can be used for resistance heating.
  • the first electric wire 71 is arranged inside the first rib 30 (almost at the axial center position) (see FIG. 3).
  • the second electric wire body 72 is disposed inside the second rib 40 (almost at the axial center position) (see FIG. 4).
  • the electric wires 70 for heating are arranged on the respective ribs 30 and 40.
  • the first electric wire 71 and the second electric wire 72 are electrically connected in the vicinity of the end of the inner cylinder 10.
  • the specific means for that purpose is optional.
  • the first rib 30 and the second rib 40 are connected at the end of the inner cylinder 10 (the right end in FIG. 1), and the first The electric wire 71 and the second electric wire 72 can be connected.
  • the flexible tube 1 configured as described above can be used as a breathing tube for a breathing circuit as in the related art.
  • the control unit 8 it is preferable to use the control unit 8 as shown in FIG.
  • the control unit 8 includes a water supply unit 81 and a power transmission unit 82 in addition to the pump 1 shown in FIG.
  • the water supply unit 81 is connected to the first flow path 50 and the second flow path 60, and sends hot water to one of them and recovers hot water returning to the other. Such a specific design of the water supply unit 81 is easy for those skilled in the art, and therefore, detailed description is omitted.
  • the energizing section 82 is electrically connected to the first electric wire 71 and the second electric wire 72, and supplies current to these.
  • the temperature of the hot water is preferably high enough to prevent dew condensation inside the flexible tube. It is considered that the temperature of the hot water is preferably equal to or higher than the body temperature (for example, 40 ° C. or higher). It is considered that the upper limit of the hot water temperature should be such that the subject does not get burned. For example, it is considered preferable to be 60 ° C or less.
  • the warm water fed into the first flow path 50 reaches an end (the right end in FIG. 2) on the downstream side of the first flow path 50, and enters the second flow path 60, where the second flow Return to water supply section 81 via road 60. During that time, the hot water heats the wall surface of the inner pipe 10 while moving spirally between the inner pipe 10 and the outer pipe 20.
  • this heating can prevent a decrease in the temperature of expiration or inspiration inside the flexible tube. This makes it possible to prevent dew condensation in the flexible tube.
  • the temperature of the sent out hot water decreases in the path and returns to the original state. At this time, the going hot water and the returning hot water are adjacent to each other, so that a temperature exchange occurs between the two. For this reason, in the flexible tube of the present embodiment, the temperature gradient can be made gentler as the entire flexible tube. If the temperature gradient is steep, it is necessary to manage the humidity by assuming the lowest temperature, and at high temperatures the humidity will be low, making actual control extremely difficult. In the present embodiment, by making the temperature gradient of the entire flexible tube gentle, it is easy to control the humidity in the flexible tube, and it is possible to more effectively prevent dew condensation.
  • the electric wire 70 is energized. It is preferable that the energization be performed after the hot water has been supplied, but it is not limited to this. By energizing the wire 70, the wire 70 is heated by resistance and generates heat. In the present embodiment, it is possible to prevent the temperature of the expiration or the inspiration inside the flexible tube from lowering by this heat generation, and to prevent the dew condensation in the flexible tube.
  • first flow path 50 and the second flow path 60 are adjacent to the first rib 30 and the second rib 40, even if the electric wire 70 is overheated, Part of the heat can be absorbed by the hot water in the flow path.
  • this flexible tube has the advantage of further improving the safety in which the flexible tube 70 is not damaged even if the electric wire 70 is overheated.
  • the electric wire 70 is disposed inside the first and second ribs 30 and 40, there is an advantage that the safety is high also from this point that the electric wire 70 is not easily short-circuited. Worried. Further, in the present embodiment, since the hot water sent into the first flow path 50 returns from the second flow path 60, if the flexible tube is damaged, the hot water returning from the second flow path 60 The amount of is reduced. If the amount of warm water returned by the second flow path 60 is detected, it is possible to detect the presence or absence of breakage of the flexible tube.
  • hot water is supplied from the first flow path 50.
  • a method of supplying hot water from the second flow path 60 and returning the hot water through the first flow path 50 may be used.
  • two ribs are formed by using two ribs.
  • three or more spirals are formed by using three or more ribs, and the flow paths formed in them are formed.
  • the hot water may be supplied or recovered by using the water.
  • the first electric heating element 71 and the second electric heating element 72 of the electric wire 70 are arranged substantially parallel to only one of the first rib 30 or the second rib 40 (the first rib 30 in the illustrated example). Have been. Further, in this embodiment, no electric heater is arranged on the other rib (not shown).
  • thermocouple 80 is disposed on the other of the first rib 30 and the second rib 40 (the second rib 40 in the illustrated example).
  • the thermocouple 80 is composed of two metal wires.
  • the tip of the thermocouple 80 (the connection point between the two metal wires) is near the tip of the coil.
  • the temperature of the flexible tube (eg, the temperature at the distal end of the flexible tube) can be measured relatively accurately by the thermocouple 80.
  • each of the above embodiments is merely an example, and shows a configuration essential to the present invention. Not something.
  • the configuration of each unit is not limited to the above as long as the purpose of the present invention can be achieved.
  • a flexible tube that can be used as a breathing tube for a breathing circuit (artificial respirator) can be provided.
  • FIG. 1 is an explanatory diagram of a conventional breathing circuit.
  • FIG. 2 is a cross-sectional view of a main part along an axial direction of a flexible tube according to the first embodiment of the present invention.
  • FIG. 3 is an enlarged view of a main part of FIG. 2.
  • FIG. 4 is an enlarged view of a main part of FIG. 2.
  • FIG. 5 is a block diagram showing an example of a control unit for using the flexible tube of FIG. 2.
  • FIG. 6 is an explanatory diagram of a second embodiment of the present invention, and is a diagram of a portion corresponding to FIG. 3.
  • FIG. 7 is an explanatory view of a third embodiment of the present invention, showing a portion corresponding to FIG. 4. Explanation of symbols

Landscapes

  • Health & Medical Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Emergency Medicine (AREA)
  • Hematology (AREA)
  • Pulmonology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Thermotherapy And Cooling Therapy Devices (AREA)
  • Pipe Accessories (AREA)

Abstract

Un tube à soufflet (tube de respiration) pour circuits de respiration fonctionnant à coût réduit tout en maintenant la sécurité. De l’eau chaude est fournie depuis l’extrémité d’un premier canal d’alimentation (50) vers l’intérieur de celui ci. L’eau chaude apportée atteint l’extrémité aval (l’extrémité du côté droit sur la Fig. 2) du premier canal d’écoulement (50), où elle entre dans un second canal d’écoulement (60) et retourne à sa position d’origine. Pendant ce temps, l’eau chaude se déplace en spirale entre un tube interne (10) et un tube externe (20), chauffant ainsi la surface de la paroi du tube interne (10). Ce chauffage empêche un abaissement de la température d’expiration ou d’inspiration à l’intérieur du tube à soufflet. En outré, en stimulant un câble électrique (70), on fournit du chauffage pour pouvoir aussi empêcher un abaissement de la température d’expiration ou d’inspiration à l’intérieur du soufflet. En outré, même si le câble électrique (70) est surchauffé, une partie de la chaleur peut être absorbée par l’eau chaude dans le canal d’écoulement. Et en plus, la détection de la quantité d’eau chaude retournée peut permettre de détecter les dégâts sur le tube à soufflet.
PCT/JP2005/004957 2004-03-22 2005-03-18 Tube a soufflet pour cuircuit de respiration Ceased WO2005089847A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2004-083073 2004-03-22
JP2004083073A JP4503322B2 (ja) 2004-03-22 2004-03-22 呼吸回路用の蛇管

Publications (1)

Publication Number Publication Date
WO2005089847A1 true WO2005089847A1 (fr) 2005-09-29

Family

ID=34993464

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2005/004957 Ceased WO2005089847A1 (fr) 2004-03-22 2005-03-18 Tube a soufflet pour cuircuit de respiration

Country Status (2)

Country Link
JP (1) JP4503322B2 (fr)
WO (1) WO2005089847A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022134924A1 (fr) * 2020-12-25 2022-06-30 北京怡和嘉业医疗科技股份有限公司 Tuyau de distribution de gaz respiratoire, cathéter nasal et dispositif de thérapie de ventilation

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101808689B (zh) * 2007-08-14 2013-10-09 柔性塑料集团 呼吸系统
US8122882B2 (en) * 2007-10-29 2012-02-28 Smiths Medical Asd, Inc. Rainout reduction in a breathing circuit
CA3177059A1 (fr) * 2009-12-22 2011-06-30 Fisher & Paykel Healthcare Limited Elements pour circuits medicaux
DE102012101795A1 (de) * 2012-03-02 2013-09-05 Hamilton Bonaduz Ag Beatmungsschlauch
PL2928533T3 (pl) * 2012-12-04 2021-05-17 Fisher & Paykel Healthcare Limited Rurki medyczne i sposoby ich wytwarzania
JP2022154079A (ja) * 2021-03-30 2022-10-13 福展美科技有限公司 呼吸療法においてユーザインタフェースと共に使用される医療用チューブ

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5946973A (ja) * 1982-09-10 1984-03-16 テルモ株式会社 呼吸回路用導管および呼吸回路
JP2002058741A (ja) * 2000-05-10 2002-02-26 Fisher & Paykel Ltd 呼吸回路の構成要素
JP2003505662A (ja) * 1999-07-22 2003-02-12 スピロ リサーチ ベスローテン ブェノートスハップ 漏れ検出機能を持つ二重壁熱交換チューブ及びその製造方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5946973A (ja) * 1982-09-10 1984-03-16 テルモ株式会社 呼吸回路用導管および呼吸回路
JP2003505662A (ja) * 1999-07-22 2003-02-12 スピロ リサーチ ベスローテン ブェノートスハップ 漏れ検出機能を持つ二重壁熱交換チューブ及びその製造方法
JP2002058741A (ja) * 2000-05-10 2002-02-26 Fisher & Paykel Ltd 呼吸回路の構成要素

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022134924A1 (fr) * 2020-12-25 2022-06-30 北京怡和嘉业医疗科技股份有限公司 Tuyau de distribution de gaz respiratoire, cathéter nasal et dispositif de thérapie de ventilation

Also Published As

Publication number Publication date
JP2005261858A (ja) 2005-09-29
JP4503322B2 (ja) 2010-07-14

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