WO1998048874A1 - Inhalateur medical a detecteur thermochromique - Google Patents

Inhalateur medical a detecteur thermochromique Download PDF

Info

Publication number
WO1998048874A1
WO1998048874A1 PCT/US1998/009181 US9809181W WO9848874A1 WO 1998048874 A1 WO1998048874 A1 WO 1998048874A1 US 9809181 W US9809181 W US 9809181W WO 9848874 A1 WO9848874 A1 WO 9848874A1
Authority
WO
WIPO (PCT)
Prior art keywords
thermochromic
container
medication
gauge
strip
Prior art date
Application number
PCT/US1998/009181
Other languages
English (en)
Inventor
Thomas M. Kuhl
Original Assignee
Kuhl Thomas M
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 Kuhl Thomas M filed Critical Kuhl Thomas M
Priority to AU72881/98A priority Critical patent/AU7288198A/en
Publication of WO1998048874A1 publication Critical patent/WO1998048874A1/fr

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water

Definitions

  • This invention relates to the measurement of doses remaining in sealed medical
  • containers specifically to such containers which are used for administering medical compounds.
  • MDI Metered Dose Inhalers
  • the amount of medication remaining and/or lacking can be determined by
  • valve stem to clog
  • thermochromic technology has been used to determine compound levels in
  • thermochromic technology to gauge the
  • the gauge is externally heated and then cooled, which shows
  • thermochromic technology specifically for detecting the amount of detergent
  • thermochromic material in a plastic opaque container by exposing the thermochromic material to a warm water spray.
  • thermochromic medication gauge is a device that uses
  • thermochromic compound(s) to detect the ambient temperature difference between the medication
  • MDI metered dose inhaler
  • Figure 1 is a front view of an MDI container with a thermochromic gauge aligned on its
  • Figure 2 is an enlarged side or cross-sectional view of a thermochromic gauge.
  • Figure 3 is a side view of a complete MDI with a thermochromic gauge and partially
  • a medication gauge 19 which is an elongated strip of plastic material 27 which may be
  • Gauge 19 has a backing of pressure
  • thermochromic layer 32 may be in the form of an
  • thermochromic layer 32 may be liquid crystal and may
  • thermochromic compound(s) imbedded in or incorporated on the polymeric film 33 To enhance thermochromic compound(s) imbedded in or incorporated on the polymeric film 33.
  • thermochromic layer 32 a black or dark coating 34 may be utilized to determine the optical properties of the thermochromic layer 32 a black or dark coating 34.
  • thermochromic layer 32 This may be ink, a black lacquer or other dark pigmented
  • thermochromic compound(s) encapsulated thermochromic compound(s) and backed by a dark coating 34 form the thermochromic
  • polymeric film 33 may have printed in or on its surface, doses remaining graduations 19(a), a full container graduation 19(b), a refill container graduation 19(c)
  • thermochromic compound used is available from Matsui
  • thermochromic layer 32 can consist of any other compound that can detect and
  • the medication gauge 19 may include an additional
  • thermochromic layer 32 This may be in the form of an optically transparent
  • ultraviolet filter layer 36 such as "Tedlar,” available from E.I. duPont de Nemours, Inc., described
  • thermochromic compounds that work at different temperature ranges on the elongated strip. This
  • thermochromic compounds that work at different temperatures
  • temperatures could possibly range from -50 degrees F to +120 degrees F, depending on seasonal
  • the method of production in the preferred embodiment may also be referred to as climate and geographic location.
  • the method of production in the preferred embodiment may also be referred to as climate and geographic location.
  • thermochromic compound used may be placed in the materials that comprise the
  • container 10 itself during their production.
  • the container is comprised of metallic
  • thermochromic compound(s) used may be integrated into the metallic materials while
  • containers made of other types of materials such as plastics or glass.
  • the container 10 is filled with two basic
  • a medication 24 which may be in the form of a liquid or solid
  • the second component is a propellant 26, which may be a liquid, a gas or
  • thermochromic compound in a
  • the user can also determine if the container is full 19(b), needs to be refilled 19(c), or is empty
  • Another method of operation may include using an outside source to create the
  • thermochromic compound(s) This could be accomplished by heating
  • thermochromic compound(s) or cooling the thermochromic compound(s) with a hot or cold liquid such as water and then waiting

Landscapes

  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Packages (AREA)

Abstract

L'invention porte sur un inhalateur (10) de doses mesurées muni d'un afficheur thermochromique (19) réagissant aux variations de température se produisant dans l'inhalateur suite à l'expansion du propulseur (26) lors de la distribution. L'afficheur thermochromique indique les doses restantes, la quantité de médicament présente dans le réservoir, etc.
PCT/US1998/009181 1997-04-30 1998-04-30 Inhalateur medical a detecteur thermochromique WO1998048874A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU72881/98A AU7288198A (en) 1997-04-30 1998-04-30 Medical inhaler with thermochromic gauge

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US4540197P 1997-04-30 1997-04-30
US60/045,401 1997-04-30

Publications (1)

Publication Number Publication Date
WO1998048874A1 true WO1998048874A1 (fr) 1998-11-05

Family

ID=21937660

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1998/009181 WO1998048874A1 (fr) 1997-04-30 1998-04-30 Inhalateur medical a detecteur thermochromique

Country Status (2)

Country Link
AU (1) AU7288198A (fr)
WO (1) WO1998048874A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9202164B2 (en) 2011-09-26 2015-12-01 Trudell Medical International Dose counter and medication delivery device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5261538A (en) * 1992-04-21 1993-11-16 Glaxo Inc. Aerosol testing method

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5261538A (en) * 1992-04-21 1993-11-16 Glaxo Inc. Aerosol testing method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9202164B2 (en) 2011-09-26 2015-12-01 Trudell Medical International Dose counter and medication delivery device

Also Published As

Publication number Publication date
AU7288198A (en) 1998-11-24

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