Electronically controlled device

• US 7,008,399 B2
• Filed: 02/13/2002
• Issued: 03/07/2006
• Est. Priority Date: 02/14/2001
• Status: Expired due to Term

• Current Assignee: Novo Nordisk A/S
• Original Assignee: Novo Nordisk A/S
• Inventors: Larsen, Andre, Hansen, Michael Ejstrup, Enggaard, Christian Peter, Moller, Claus Schmidt, Bendsen, Henrik, Pedersen, Thomas, Pedersen, Carsten Bitsch
• Primary Examiner(s): MENDEZ, MANUEL A
• Application Number:
  US10/076,025
• Publication Number:
  US 20020143288A1
• Time in Patent Office: 1,483 Days
• Field of Search: 604 65- 67, 604/131, 604/132, 604/133, 604/134, 604/154, 604/155, 604/156, 604/315, 128/DIG.12, 128/13
• US Class Current: 604/65
• CPC Class Codes: A61M 2005/3125 specific display means, e.g. to indicate dose setting
• CPC Class Codes: A61M 2205/3317 Electromagnetic, inductive or dielectric measuring means
• CPC Class Codes: A61M 2205/50 with microprocessors or computers
• CPC Class Codes: A61M 2205/52 with memories providing a history of measured variating parameters of apparatus or patient
• CPC Class Codes: A61M 2205/8206 battery-operated
• CPC Class Codes: A61M 5/142 Pressure infusion, e.g. using pumps
• CPC Class Codes: A61M 5/31525 Dosing burettes, pipettes B01L3/02
• CPC Class Codes: A61M 5/31551 including axial movement of dose setting member
• CPC Class Codes: A61M 5/31573 Accuracy improving means
• CPC Class Codes: G01D 5/2451 Incremental encoders G01D5/2454 takes precedence

Abstract

A device for injecting preparations is controlled by a sealed circuit block (10) containing integrated sensors (17, 21, 22, 23 24) which monitors selected parameters. Two pairs of integrated Hall elements (21, 23 and 22, 24) monitors movements relative to a sine formed magnetic field presented along the perimeter of a multipoled magnetized ring (7). The Hall elements in each pair are displaced 180° magnetically relative to each other and the two pairs of Hall elements are displaced 90° magnetically from each other. Each pair is coupled to a differential amplifier (25, 26) to provide a cosine and a sine signal, respectively. The sine signal is divided by the cosine signal to create a tangent signal as an entrance to a table showing the angle of the movement.

Claims

1. A device for injecting or infusing medicine wherein:

the device comprises a sealed circuit receiving signals from sensors that monitor selected parameters describing conditions of the device, wherein the sensors are integrated in a sealed circuit block and wherein at least one sensor is a Hall sensor and wherein the Hall sensor is signalled by a magnet fixed to a first part of the device to monitor the position of the first part relative to a second part accomdating the sealed circuit block and wherein the sealed circuit block comprises a timer.

2. The device of claim 1, wherein the timer is triggered by movement of the magnet relative to the Hall sensor.

3. The device of claim 1, wherein a first signal is sent to the circuit to energize the Hall sensor and other energy consuming sensors.

4. The device of claim 1, wherein motion of the first part relative to the second part corresponds to a size of a dose of medication and wherein the motion is sensed by the movement of the magnet relative to the Hall sensor and signal(s) from the Hall sensor communicate to the circuit to track the size of the dose and wherein the timer is triggered by injecting or infusing and tracks elapsed time.