Method and apparatus in connection with an inhaler

• US 5,839,429 A
• Filed: 08/20/1997
• Issued: 11/24/1998
• Est. Priority Date: 03/25/1994
• Status: Expired due to Fees

• Current Assignee: Astra AB (Astrazeneca PLC)
• Original Assignee: Astra AB (Astrazeneca PLC)
• Inventors: Marnfeldt, Nils Goran, Waldeck, Johan Mats Bertil
• Primary Examiner(s): Lewis, Aaron J.
• Application Number:
  US08/915,121
• Time in Patent Office: 461 Days
• Field of Search: 128/200.14, 128/200.23, 128/203.12, 128/204.23, 128/205.23, 128/203.15
• US Class Current: 128/200.14
• CPC Class Codes: A61M 15/00 Inhalators drug delivery in endotracheal tubes A61M16/04
• CPC Class Codes: A61M 2016/0021 with a proportional output signal, e.g. from a thermistor
• CPC Class Codes: A61M 2205/215 Tilt detection, e.g. for warning or shut-off
• CPC Class Codes: A61M 2205/8206 battery-operated

Abstract

An apparatus for training a person to use an inhaler comprises such an inhaler connected to a processing device. The inhaler comprises means for detecting when the inhaler is activated for making a dose of a drug available for inhalation and means for detecting the inhalation flow through the inhaler. The processing device comprises means for indicating to the patient how the inhaler is to be activated in order to make a dose available and means for urging the patient to perform such an activation. The latter means are activated when the apparatus is turned on and deactivated when a proper activation of the inhaler is detected. The processing device further comprises means for urging the patient to inhale through the inhaler. These means are activated when a proper activation of the inhaler is detected and deactivated when an inhalation flow is detected. The measured inhalation flow is indicated by indication means on the processing device.

A method for training a person to use an inhaler is also disclosed.

Claims

1. A training device for training a patient to use a breath-activated dry powder inhaler correctly, the training device comprising:

a breath-activated dry powder inhaler that is constructed to move a dose of powdered medicament into position for inhalation when activated by a patient, and to subsequently dispense said dose when a patient applies a sufficient inspiratory flow to said inhaler;

an activation signal constructed to indicate to a patient an instruction to activate the inhaler;

an activation sensor constructed to detect when a patient has activated the inhaler;

an inhalation signal constructed to indicate to a patient, after detection of inhaler activation, an instruction to inhale through the inhaler;

an inhalation flow sensor constructed to measure the inspiratory flow rate through the inhaler; and

a flow signal to indicate to a patient the inspiratory flow applied,

wherein each of said activation sensor and said inhalation sensor comprises a microphone,

wherein said activation sensor further comprises a position transducer and said activation signal comprises an indicator for indicating whether the inhaler is held in a correct position during activation.

2. A training device for training a patient to use a breath-activated dry powder inhaler correctly, the training device comprising:

a breath-activated dry powder inhaler that is constructed to move a dose of powdered medicament into position for inhalation when activated by a patient, and to dispense said dose when a patient applies a sufficient inspiratory flow to said inhaler;

an activation signal constructed to indicate to a patient an instruction to activate the inhaler;

an activation sensor constructed to detect when a patient has activated the inhaler, said activation sensor comprising a position transducer;

an inhalation signal constructed to indicate to a patient an instruction to inhale through the inhaler, said activation signal comprising an indicator for indicating whether the inhaler is held in a correct position during activation;

an inhalation flow sensor constructed to measure the inspiratory flow rate through the inhaler; and

a flow signal to indicate to a patient the inspiratory flow applied.

3. The device of claim 2, wherein each of said activation sensor and said inhalation sensor comprises a microphone.