MEDICAL DEVICE AND METHOD FOR CONTROLLING SAME

• US 20150238717A1
• Filed: 09/26/2012
• Published: 08/27/2015
• Est. Priority Date: 09/26/2012
• Status: Active Grant

• Current Assignee: Terumo Kabushiki Kaisha (Terumo Corporation)
• Original Assignee: Terumo Kabushiki Kaisha (Terumo Corporation)
• Inventors: Hatanaka, Youko
• Granted Patent: US 9,895,502 B2
• Time in Patent Office: Days
• CPC Class Codes: A61M 16/0051 with alarm devices
• CPC Class Codes: A61M 2205/17 with redundant control systems
• CPC Class Codes: A61M 2205/18 with alarm
• CPC Class Codes: A61M 2205/50 with microprocessors or computers
• CPC Class Codes: A61M 2205/583 by visual feedback
• CPC Class Codes: A61M 60/113 in other functional devices, e.g. dialysers or heart-lung machines
• CPC Class Codes: A61M 60/117 for assisting the heart, e.g. transcutaneous or external ventricular assist devices
• CPC Class Codes: A61M 60/196 replacing the entire heart, e.g. total artificial hearts [TAH]
• CPC Class Codes: A61M 60/232 Centrifugal pumps
• CPC Class Codes: A61M 60/38 Blood oxygenation
• CPC Class Codes: A61M 60/422 the force acting on the blood contacting member being electromagnetic, e.g. using canned motor pumps
• CPC Class Codes: A61M 60/508 Electronic control means, e.g. for feedback regulation
• CPC Class Codes: G16H 40/63 for local operation
• CPC Class Codes: G16Z 99/00 Subject matter not provided for in other main groups of this subclass

Abstract

A medical device has a first controller that has a control section responsible for sequence control of a device and is for controlling the medical device, a second controller that operates if a failure occurs in the first controller, and an alarm that makes a notification output based on exclusive OR between notification outputs of the first controller and the second controller. The second controller, after acquiring the notification output of the first controller, outputs its own notification output as it is if the notification output of the first controller is in an OFF state, or inverts its own notification output so as to output an inversion result if the notification output of the first controller is in an ON state.

Claims

1. A medical device comprising:

a first controller that has a control section responsible for sequence control of the medical device, wherein the first controller generates a first notification signal corresponding to detection of a failure in the first controller;

a second controller responsible for sequence control of the medical device if a failure occurs in the first controller, wherein the second controller generates a second notification signal corresponding to detection of a failure in the second controller; and

an alarm indicator that makes a notification output based on exclusive OR between the first and second notification signals,

wherein the second controller receives the first notification signal and generates its second notification signal unchanged if the first notification signal is in an OFF state, or inverts its second notification signal if the first notification signal is in an ON state.

2. The medical device according to claim 1, wherein

the alarm indicator has a lamp that is turned on with the notification output being in an ON state.

3. The medical device according to claim 1, wherein

the alarm indicator has a sound emitter that emits a sound with the notification output being in an ON state.

4. The medical device according to claim 1, wherein

in order to perform notification using a plurality of alarms, the alarm indicator includes a plurality of elements each controlled independently corresponding to each of the plurality of alarms.

5. The medical device according to claim 1, wherein

in order to perform notification according to a binary code, the alarm indicator includes a plurality of elements each controlled independently corresponding to each of a plurality of bits configuring a binary code input to the alarm.

6. The medical device according to claim 1, wherein

the first controller receives the second notification signal and generates its first notification signal unchanged if the second notification signal is in an OFF state, or inverts its first notification signal if the second notification signal is in an ON state.

7. A method of controlling a medical device, wherein the device:

comprises a first controller that has a control section responsible for sequence control of the medical device,

a second controller responsible for sequence control of the medical device if a failure occurs in the first controller, and

a warning indicator,

wherein the method comprises the steps of;

the first controller generating a first notification signal corresponding to detection of a failure in the first controller;

the second controller generating a second notification signal corresponding to detection of a failure in the second controller;

the second controller acquiring the first notification signal;

the second controller inverting the second notification signal if the first notification signal is in an ON state; and

activating the warning indicator in response to an exclusive OR of the first and second notification signals.