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WO2006046908A1 - Amelioration d'un dispositif permettant de recuperer un anesthesique et procede de recuperation d'un anesthesique - Google Patents

Amelioration d'un dispositif permettant de recuperer un anesthesique et procede de recuperation d'un anesthesique Download PDF

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Publication number
WO2006046908A1
WO2006046908A1 PCT/SE2005/001576 SE2005001576W WO2006046908A1 WO 2006046908 A1 WO2006046908 A1 WO 2006046908A1 SE 2005001576 W SE2005001576 W SE 2005001576W WO 2006046908 A1 WO2006046908 A1 WO 2006046908A1
Authority
WO
WIPO (PCT)
Prior art keywords
unit
anaesthetic
gas
patient
tube
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/SE2005/001576
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English (en)
Inventor
Hans Lambert
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of WO2006046908A1 publication Critical patent/WO2006046908A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • A61M16/0087—Environmental safety or protection means, e.g. preventing explosion
    • A61M16/009—Removing used or expired gases or anaesthetic vapours
    • 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
    • A61M16/0087—Environmental safety or protection means, e.g. preventing explosion
    • A61M16/009—Removing used or expired gases or anaesthetic vapours
    • A61M16/0093—Removing used or expired gases or anaesthetic vapours by adsorption, absorption or filtration
    • 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
    • A61M16/0816—Joints or connectors
    • A61M16/0841—Joints or connectors for sampling
    • A61M16/085—Gas sampling
    • 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
    • A61M16/1045—Devices for humidifying or heating the inspired gas by using recovered moisture or heat from the expired gas
    • 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
    • A61M16/1005—Preparation of respiratory gases or vapours with O2 features or with parameter measurement
    • A61M2016/102—Measuring a parameter of the content of the delivered gas

Definitions

  • the present invention relates a device and method for recovering anaesthetic during the use of inhaled anesthetics.
  • Such devices and methods are disclosed through US patents 5044361, 6206002 and 6488028 for instance.
  • the purpose of such devices are to reduce the consumption of anaesthetic preparations when treating a patient.
  • the US patent 5044361 describes an apparatus and a method where a so-called reflection filter is used in a housing.
  • This reflection filter can be made of zeolite particles in between two filter materials, to avoid that particles are transported to the patient.
  • the anesthetic gas is led into the housing containing the reflection filter in between the patient and the reflection filter with no special means to distribute the gas evenly in the gas stream.
  • the concentration of the anaesthetic given to the patient is very important and in most cases it is necessary to monitor this concentration with a specially designed gas monitor.
  • the US patent 6206002 describes a device containing anaesthetic reflector and a second unit which has the ability to absorb and desorb water. This second unit is placed in between the - patient and the reflector. It also describes an anaesthetic supply apparatus connected in between the second unit and the patient. This arrangement gives the same problem to the device as in US 5044028 and the concentration of gas given to the patient is not evenly distributed in the gas stream and thus difficult to monitor correctly.
  • the anaesthetic is mostly described as a gas, but if supplied in liquid form to the device, the problem would be even worse as no gas mixing or distributing arrangement is described.
  • the US patent 6488028 describes a device where a vaporizing device, called an evaporator, is placed in between the patient and a unit, called absorption-desorption filter, and where the gas passes across the vaporizing device.
  • This evaporator is substantially impervious to the gases flowing to and from the patient and thus takes up a small portion of the cross-section of the housing surrounding it and the gases to and from the patient pass across it.
  • It also describes a first unit described as an absorption filter and which can be laminated to a second unit described as a bacteria filter. The air stream going to the patient is passing through the first unit then the second unit and then across the evaporator before it goes to the patient.
  • these devices have no means of distributing the anaesthetic in an even way in the gas stream and thus the gas monitor will monitor a varying concentration instead of a stable concentration.
  • the object of the present invention is to alleviate this deficiency in the known devices and methods, and to increase the gas monitoring reliability and performance.
  • the supply tube ends close to the surface of either the first unit or the second unit.
  • both the units i.e. the anaesthetic reflector and the second unit, are located in a common housing. This simplifies the construction, making it more compact and easily managed. It also ensures that the two units are compatible from the point of view of size.
  • the supply means for the anaesthetic preparation is preferably arranged in the tube between the first unit and the second unit.
  • FIG. 1 illustrates schematically a reflector according to known technology
  • FIG. 2 illustrates schematically a preferred embodiment of the present invention
  • FIG. 3- 6 illustrates schematically other embodiments of the present invention.
  • FIG. 1 which illustrates the principle for recovering anaesthetic according to known technology
  • 1 denotes a patient being treated.
  • the patient 1 is connected via the patient tube 2 to an anaesthetic first unit 6 arranged in a housing 10.
  • This first unit 6 has the ability to absorb and desorb anaesthetic .
  • a second unit 5 is arranged which can be either a filter or a heat and moisture exchanger or both.
  • the side of the first unit 6 is facing an outlet tube connected to a breathing system 7.
  • This breathing system can be either a connection to the open air, an anesthesia apparatus, a ventilator or any other gas handling system to supply gas and take away gas to and from the patient.
  • 8 is a gas monitor which monitors the gas concentration in the gas supply tube 2.
  • This gas monitor can either work as a mainstream monitor, sensing the gas concentration, going to and from the patient, directly in the patient tube or a side-stream monitor sensing the gas concentration in a sample pumped from the patient tube.
  • the function of this kind of gas monitors are well-known to those skilled in anesthesia or intensive care.
  • the first unit 6 can be made of different materials like e.g. woven active carbon.
  • the device according to the invention illustrated in an embodiment shown in FIG. 2 is constructed in an equivalent manner to that shown in FIG. 1. Accordingly, the device shown in FIG. 2 illustrates a patient 1 connected via the patient tube 2 to first unit 6 arranged in a housing 10. This first unit 6 has the ability to absorb and desorb anaesthetic . In the same housing is a second unit 5, which can be either a filter or a heat and moisture exchanger or both, is arranged. The second unit 5 is highly porous and have a low gas flow resistance.
  • This opening can be with or without a porous unit which is substantially impervious to the gases, described as arrows, going to and from the patient.
  • This porous unit if used, can only take up a smaller part of the cross-section of the housing as otherwise the flow of gas to and from the patient will be hindered.
  • the side of the first unit 6 is facing an outlet tube connected to a breathing system 7.
  • This breathing system can be either a connection to the open air, an anesthesia apparatus, a ventilator or any other gas handling system to supply gas and take away gas to and from the patient.
  • 8 is a gas monitor which monitors the gas concentration in the gas supply tube 2.
  • both unit one and unit two are shaped as a cylindrical plates with axial through-flow. However, it will be understood that the shape is of minor significance.
  • One or both of these units may be annular in shape, for instance, with radial through-flow direction, in which case fi ⁇ a ⁇ enae ⁇ dngH ⁇ r ⁇ ldt ⁇ ll ⁇ rffiS.iSufeBaJecthffiicitt ⁇ ivantageous from an economic manufacturing point of view as it contains few components but still obtains a very good distribution of anaesthetic.
  • the device according to FIG. 3 incorporates the same components designated by the same reference numerals shown in FIG. 2 but differs from that in FIG. 2 in that the porous unit at the opening 4 is formed as a cross giving an even better anaesthetic distribution in the gas going to the patient and monitored by the gas monitor 8.
  • the device according to FIG. 4 incorporates the same components designated by the same reference numerals shown in FIG. 3 but differs from that in FIG. 3 in that the porous unit at the opening 4 is formed as a cylindrical piece, close to one of the sides of the housing.
  • the device according to FIG. 5 incorporates the same components designated by the same reference numerals shown in FIG. 2 but differs from that in FIG. 2 in that the opening 4 is touching the surface of unit two 5. This results in a good spreading of the anaesthetic inside the unit two 5 and thus a good distribution in the gas going to the patient and monitored by the gas monitor 8.
  • the device according to FIG. 6 incorporates the same components designated by the same reference numerals shown in FIG. 2 but differs from that in FIG. 2 in that the second unit 5 is made of two layers of material 5a and 5b laminated together with the opening 4 is touching the surfaces in between 5a and 5b. This results in a very good spreading of the anaesthetic inside the unit two 5 and thus a good distribution in the gas going to the patient and monitored by the gas monitor 8.

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  • Health & Medical Sciences (AREA)
  • Anesthesiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Hematology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Veterinary Medicine (AREA)
  • Public Health (AREA)
  • Emergency Medicine (AREA)
  • Pulmonology (AREA)
  • Biomedical Technology (AREA)
  • General Health & Medical Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Ecology (AREA)
  • Environmental Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)

Abstract

L'invention se rapporte à un dispositif comprenant une première unité qui est un réflecteur anesthésique utilisé pour absorber un milieu anesthésique à partir des gaz exhalés par le patient et désorber le milieu anesthésique dans les gaz inhalés par le patient. Selon l'invention, une seconde unité est disposée dans le système et distribue le produit anesthésique de manière régulière dans le gaz inhalé par le patient. L'alimentation en produit anesthésique est disposée entre la première et la seconde unité. Le dispositif et le procédé de l'invention permettent au gaz inhalé d'être correctement contrôlé par un appareil de contrôle de gaz.
PCT/SE2005/001576 2004-10-25 2005-10-21 Amelioration d'un dispositif permettant de recuperer un anesthesique et procede de recuperation d'un anesthesique Ceased WO2006046908A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0402572-2 2004-10-25
SE0402572A SE0402572D0 (sv) 2004-10-25 2004-10-25 Improvement of a device for recovering anaesthetic

Publications (1)

Publication Number Publication Date
WO2006046908A1 true WO2006046908A1 (fr) 2006-05-04

Family

ID=33448695

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE2005/001576 Ceased WO2006046908A1 (fr) 2004-10-25 2005-10-21 Amelioration d'un dispositif permettant de recuperer un anesthesique et procede de recuperation d'un anesthesique

Country Status (2)

Country Link
SE (1) SE0402572D0 (fr)
WO (1) WO2006046908A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007048893C5 (de) * 2007-10-11 2011-06-01 Dräger Medical GmbH Vorrichtung zur Adsorption und Desorption von Anästhesiemittel

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5044361A (en) * 1987-04-14 1991-09-03 Zenova Aktiebolag Method and apparatus for reuse of anesthetics
EP0455049A1 (fr) * 1990-05-03 1991-11-06 Siemens-Elema AB Procédé pour la réutilisation d'un anesthésique et dispositif pour la réalisation de ce procédé
EP0972534A2 (fr) * 1998-07-17 2000-01-19 Siemens-Elema AB Dispositif d'administration de produits anesthésiques
US6206002B1 (en) * 1997-11-06 2001-03-27 Hudson Rci Ab Device and method for recovering anaesthetic during the use of inhaled anaesthetics
US6488028B1 (en) * 1995-10-16 2002-12-03 Hudson Rci Ab Device for recovering anaesthetic

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5044361A (en) * 1987-04-14 1991-09-03 Zenova Aktiebolag Method and apparatus for reuse of anesthetics
EP0455049A1 (fr) * 1990-05-03 1991-11-06 Siemens-Elema AB Procédé pour la réutilisation d'un anesthésique et dispositif pour la réalisation de ce procédé
US6488028B1 (en) * 1995-10-16 2002-12-03 Hudson Rci Ab Device for recovering anaesthetic
US6206002B1 (en) * 1997-11-06 2001-03-27 Hudson Rci Ab Device and method for recovering anaesthetic during the use of inhaled anaesthetics
EP0972534A2 (fr) * 1998-07-17 2000-01-19 Siemens-Elema AB Dispositif d'administration de produits anesthésiques

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007048893C5 (de) * 2007-10-11 2011-06-01 Dräger Medical GmbH Vorrichtung zur Adsorption und Desorption von Anästhesiemittel
US8267087B2 (en) 2007-10-11 2012-09-18 Dräger Medical GmbH Device for adsorbing and desorbing anesthetic

Also Published As

Publication number Publication date
SE0402572D0 (sv) 2004-10-25

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