Fail-safe module integral with a sedation and analgesia system and method

• US 7,527,052 B2
• Filed: 02/25/2003
• Issued: 05/05/2009
• Est. Priority Date: 02/25/2002
• Status: Active Grant

• Current Assignee: Scott Laboratories, Inc.
• Original Assignee: Scott Laboratories, Inc.
• Inventors: Derouen, Jason, Hickle, Randall S.
• Primary Examiner(s): DeMille; Danton
• Assistant Examiner(s): DIXON, ANNETTE FREDRICKA
• Application Number:
  US10/372,654
• Publication Number:
  US 20030217747A1
• Time in Patent Office: 2,261 Days
• Field of Search: 128/200.24, 128/202.22, 128/203.12, 128/203.25, 128/204.23, 128/205.11, 128/205.23, 128/DIG.12, 128/DIG.13, 604/31, 604/111
• US Class Current: 128/203.14
• CPC Class Codes: A61M 16/01 specially adapted for anaesthetising A61M16/104, A61M16/18 take precedence
• CPC Class Codes: A61M 2005/1405 Patient controlled analgesia [PCA]
• CPC Class Codes: A61M 2202/0241 Anaesthetics; Analgesics
• CPC Class Codes: A61M 2205/16 with back-up system in case of failure
• 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 2205/52 with memories providing a history of measured variating parameters of apparatus or patient
• CPC Class Codes: A61M 2205/702 automatically during use
• CPC Class Codes: A61M 5/172 electrical or electronic A61M5/16804, A61M5/16831 take precedence
• CPC Class Codes: A61M 5/1723 using feedback of body parameters, e.g. blood-sugar, pressure measurement of body parameters A61B5/00

Abstract

The invention provides a fail-safe module (FSM) integral with a sedation and analgesia system that meets the high-reliability needs of sedation and/or analgesia delivered by non-anesthetist practitioners. The FSM may operate in “real-time” in order to ensure optimal patient safety. The FSM may deactivate specific patient interfaces, user interfaces, and/or sedation and analgesia delivery in order to ensure patient safety and has redundant safety systems in order to provide the fail-safe module with an accurate assessment of controller functionality.

Claims

1. A sedation and analgesia system comprising:

a patient health monitor device adapted so as to be coupled to a patient and generate a signal reflecting at least one physiological condition of the patient;

a drug delivery controller supplying one or more sedative, analgesic, and/or amnestic drugs to the patient;

an electronic controller interconnected with the patient health monitor and the drug delivery controller;

said electronic controller having a data set reflecting parameters of the at least one physiological condition, wherein said electronic controller receives said signal and in response manages the application of the drugs in accord with the parameters; and

a fail safe module receiving a signal from the electronic controller, the signal from the electronic controller indicating the electronic controller is functioning properly, wherein the fail safe module is interconnected with the electronic controller such that in the absence of a signal indicating the controller is functioning properly, the fail safe module stops the electronic controller from managing the application of the one or more drugs, wherein upon the absence of a signal indicating the controller is functioning properly, the fail safe module stores information indicating the absence of said signal indicating the controller is functioning properly and alerts a user that the sedation and analgesia system has experienced a failure, and wherein said electronic controller provides the user with a simulation of a failure event or message, where the response of the fail-safe module may be tested, in the absence of a power down, to determine whether the fail safe module functions properly in automatedly transferring the sedation and analgesia system to a safe state mode and operation state mode at appropriate times.

2. The sedation and analgesia system according to claim 1, further comprising an interface for indicating that during the absence of a signal indicating the controller is functioning properly, the system is not functioning properly.

3. The sedation and analgesia system according to claim 2, wherein the interface indicates the system is not functioning properly with one or more system state alarms.

4. The sedation and analgesia system according to claim 1, further comprising a gas delivery system for the delivery of at least one gas or gas mixture to the patient, wherein the electronic controller is further interconnected with the gas delivery system and manages the delivery of the at least one gas or gas mixture in accord with the parameters.

5. The sedation and analgesia system according to claim 4, wherein upon the absence of a signal indicating the controller is functioning properly, the fail safe module stops the electronic controller from managing the delivery of at least one gas or gas mixture.

6. The sedation and analgesia system according to claim 1, wherein upon the receipt of the signal indicating the controller is functioning properly after a period of absence in receiving the signal, the fail safe module restarts the electronic controller'"'"'s management of the application of the drugs.

7. The sedation and analgesia system according to claim 1, wherein the signal indicating the controller is functioning properly is a strobe.

8. The sedation and analgesia system according to claim 1, comprising a health check system interconnected with the fail safe module, wherein the health check system receives one or more signals from one or more subsystems of the sedation and analgesia system indicating the one or more subsystems is functioning properly.

9. An apparatus for providing pain and/or sedative management to a patient undergoing a medical and/or surgical procedure, said apparatus comprising:

a monitor adapted to be operatively connected to said patient for monitoring at least one physiological condition of said patient and for transmitting data reflecting said condition to a control unit;

a control unit for controlling infusion of a sedative and/or analgesic drug to said patient during said procedure, said control unit receiving said data from said monitor and having an algorithm for controlling said drug delivery to maintain said patient in a safe condition during said procedure, wherein the control unit initiates an automated test command at a predetermined time before the beginning of the medical and/or surgical procedure; and

a fail-safe unit interconnected to said apparatus receiving a signal from the control unit indicating the control unit is functioning properly, where in the absence of a signal indicating the control unit is functioning properly, the fail safe unit stops the control unit from managing the infusion of the one or more drugs as response to said an automated test command and during said procedure;

wherein said control unit provides a simulation of a failure event so that the response of the fail-safe unit may be tested without powering down to determine whether the fail-safe unit functions properly in automatedly transferring the sedation and analgesia system to a safe state mode and operation state mode.