Electronic medication chronolog device

• US 5,809,997 A
• Filed: 10/10/1995
• Issued: 09/22/1998
• Est. Priority Date: 05/18/1995
• Status: Expired due to Fees

• Current Assignee: Westmed Inc. (SunMed Group Holdings LLC)
• Original Assignee: Medtrac Technologies, Inc.
• Inventors: Wolf, James L.
• Primary Examiner(s): Asher, Kimberly L.
• Application Number:
  US08/541,492
• Time in Patent Office: 1,078 Days
• Field of Search: 128/200.14, 128/200.23, 128/202.22, 128/205.23, 128/203.12
• US Class Current: 128/200.23
• CPC Class Codes: A61M 15/0005 with means for agitating the medicament
• CPC Class Codes: A61M 15/008 Electronic counters
• CPC Class Codes: A61M 15/009 using medicine packages with incorporated spraying means, e.g. aerosol cans pocket atomiser of the injector type A61M11/08
• CPC Class Codes: A61M 2205/3375 Acoustical, e.g. ultrasonic, measuring means
• CPC Class Codes: A61M 2205/3561 local, e.g. within room or hospital
• CPC Class Codes: A61M 2205/3592 using telemetric means, e.g. radio or optical transmission
• CPC Class Codes: A61M 2205/52 with memories providing a history of measured variating parameters of apparatus or patient
• CPC Class Codes: A61M 2209/086 Docking stations

Abstract

An electronic medication chronolog device adapted for attachment to various shapes and sizes of conventional pressurized inhalant packages. The packages include in common an actuator housing with one end having a mouthpiece and an opposite end having an opening for receiving a vial/canister therein. The vial/canister having a valve stem used for dispensing a prescribed dosage of medication inhalant in an aerosol chamber inside the actuator housing. The aerosol chamber is disposed next to an outlet of the mouthpiece for dispensing the medication therethrough. The chronolog device includes computing and recording equipment with audio and visual display mounted in a chronolog housing. The chronolog housing is adapted for attachment to the actuator housing. A strain gauge sensing arm is attached to the computing equipment and extends through a hole in a side of the actuator housing for engaging a portion of the vial/canister next to the valve stem. The sensing arm senses and signals the computing equipment when the valve stem of the vial/canister is properly compressed for release of medication. Also, the sensing arm senses and signals the computing equipment when the vial/canister is engaged and disengaged inside the actuator housing Further, a fast response thermistor is connected to the computing equipment and disposed between the hole in the side of the actuator housing and an opening in the chronolog housing. The thermistor senses and signals each occurrence and amount of inhale air flow and exhale air flow in the actuator housing.

Claims

1. An accessory chronolog apparatus adapted for attachment to a conventional pressurized inhalant package, the package includes an actuator housing with one end having a mouthpiece and an opposite end having an opening for receiving a vial/canister therein, the vial/canister having a valve stem used for dispensing a prescribed dosage of medication inhalant in an aerosol chamber inside the actuator housing, the aerosol chamber is disposed next to an outlet of the mouthpiece, the actuator housing having a hole in a side thereof, the accessory chronolog apparatus comprising:

a chronolog housing;

processing means including a processor disposed in said chronolog housing, said chronolog housing adapted for attachment to the actuator housing, said processing means for logging when the medication inhalant is released from the vial/canister;

a strain gauge sensing arm, one end of said sensing arm in electrical communication with said processing means, an opposite end of said sensing arm adapted for receipt through the hole in the side of the actuator end of the vial/canister, said sensing arm sensing and signaling said processing means when the vial/canister is properly depressed for release of medication; and

a fast response thermistor mounted inside said chronolog housing and in an air flow path between the hole and the side of the actuator housing and an opening in said chronolog housing, said thermistor in electrical communication with said processing means, said thermistor sensing and signaling said processing means each occurrence an amount of inhale air flow in the actuator housing.

2. The accessory chronolog apparatus as described in claim 1, further including a medication mixing sensor in electrical communication with said processing means, said mixing sensor disposed in said chronolog housing, said mixing sensor for sensing and signaling said processing means when proper mixing of the medication in the vial/canister has occurred.

3. The accessory chronolog apparatus as described in claim 2, wherein said medication mixing sensor is an accelerometer sensor and reed switch, when the medication in the vial/canister is properly shaken, the accelerometer sensor closes the reed switch and the processing means is signaled that proper mixing has occurred.

4. The accessory chronolog apparatus as described in claim 3 wherein said accelerometer sensor is a spring biased magnet, when said magnet is compressed against the spring, the magnet'"'"'s magnetic field comes in contact with and closes said reed switch.

5. The accessory chronolog apparatus as described in claim 1, wherein said fast response thermistor senses and signals said processing means when medication is released from the vial/canister.

6. The accessory chronolog apparatus as described in claim 5, wherein when the medication is discharged from the vial/canister, an instantaneous pressure change creates a perturbance in the ambient air, the perturbance of air sensed by said fast response thermistor for signaling said processing means.

7. The accessory chronolog apparatus as described in claim 1, further including display means in electrical communication with said processing means and disposed on said chronolog housing, said display means for displaying when the vial/canister is engaged and disengaged inside the actuator housing, for displaying when the inhalant is released from the vial/canister, for displaying the amount of inhalant dispensed from the vial/canister and the duration of the inhalant dispensed, for displaying each occurrence of inhale flow in the actuator housing and for displaying the amount of inhale flow in the actuator housing.