Blood treatment apparatus with alarm device

• US 20070000824A1
• Filed: 03/22/2006
• Published: 01/04/2007
• Est. Priority Date: 03/23/2005
• Status: Active Grant

• Current Assignee: B. Braun Medizintechnologie GmbH (B. Braun Holding GmbH & Co. KG)
• Original Assignee: B. Braun Medizintechnologie GmbH (B. Braun Holding GmbH & Co. KG)
• Inventors: Schin, Robert, Bock, Gerhard, Dolgos, Sandor, Niemetz, Gunter
• Granted Patent: US 7,648,476 B2
• Time in Patent Office: Days
• US Class Current: 210/85
• CPC Class Codes: A61M 1/16 with membranes
• CPC Class Codes: A61M 1/1601 Control or regulation
• CPC Class Codes: A61M 2205/17 with redundant control systems
• CPC Class Codes: A61M 2205/18 with alarm
• CPC Class Codes: A61M 2205/33 Controlling, regulating or measuring
• CPC Class Codes: A61M 2205/50 with microprocessors or computers

Abstract

A blood treatment apparatus includes a controller and a supervisor, which together monitor various sensors. The controller is equipped with a first alarm system and the supervisor is equipped with a second alarm system. To avoid competition between both alarm systems, the alarm system of the supervisor normally remains mute. A function monitoring device monitors the function of the first alarm system and signals a missing alarm to the supervisor. Only in this case will the second alarm system of the supervisor be activated.

Claims

1. A blood treatment apparatus comprising:

a blood circulator;

a dialysate circulator;

sensors for monitoring parameters;

actors for effecting changes in the circulators;

a controller for monitoring signals supplied from the sensors and for controlling the actors;

a first alarm system controlled by the controller;

a supervisor monitoring the controller;

a second alarm system controlled by the supervisor, the controller and the supervisor being configured to detect alarm conditions; and

a function monitoring device,

wherein, upon detection of an alarm condition by at least one of the controller and the supervisor, the first alarm system is activated, and wherein, in case of a failure of the first alarm system, the function monitoring device activates the second alarm system through the supervisor.

2. The blood treatment apparatus of claim 1, wherein the alarm condition is divided into different alarm stages depending on the signals from the sensors, the alarm condition of the highest alarm stage being activated if several alarm conditions should be present at the same time.

3. The blood treatment apparatus of claim 1, further comprising an alarm table in each of the controller and the supervisor, respectively, wherein each alarm table includes a plurality of alarm conditions detected by the sensors of the controller or the supervisor, respectively.

4. The blood treatment apparatus of claim 2, wherein the alarm stages have sounds differing in frequency and/or tonal rhythm.

5. The blood treatment apparatus of claim 1, further comprising an alarm acknowledgement key, wherein operation of the alarm acknowledgement key halts the alarm for predetermined period of time.

6. The blood treatment apparatus of claim 3, wherein the alarm is issued depending on the alarm conditions contained in the alarm table.

7. The blood treatment apparatus of claim 1, wherein the sensors are sampled in fixed time intervals.