Method and system for circulatory delay compensation in closed-loop control of a medical device

• US 20080066752A1
• Filed: 09/20/2006
• Published: 03/20/2008
• Est. Priority Date: 09/20/2006
• Status: Abandoned Application

• Current Assignee: Nellcor Puritan Bennett Incorporated (Medtronic Plc)
• Original Assignee: Nellcor Puritan Bennett Incorporated (Medtronic Plc)
• Inventors: Vandine, Joseph Douglas, Baker, Clark R.
• Application Number:
  US11/524,182
• Publication Number:
  US 20080066752A1
• Time in Patent Office: Days
• US Class Current: 128/204.23
• CPC Class Codes: A61M 16/026 specially adapted for predicting, e.g. for determining an information representative of a flow limitation during a ventilation cycle by using a root square technique or a regression analysis
• CPC Class Codes: A61M 16/101 using an oxygen concentrator
• CPC Class Codes: A61M 16/107 in the inspiratory path
• CPC Class Codes: A61M 16/1075 by influencing the temperature A61M16/1045 takes precedence
• CPC Class Codes: A61M 16/12 by mixing different gases
• CPC Class Codes: A61M 16/125 Diluting primary gas with ambient air
• CPC Class Codes: A61M 2016/0039 in the inspiratory circuit
• CPC Class Codes: A61M 2016/0042 in the expiratory circuit
• CPC Class Codes: A61M 2205/6018 providing set-up signals for the apparatus configuration
• CPC Class Codes: A61M 2230/005 Parameter used as control input for the apparatus
• CPC Class Codes: A61M 2230/06 Heartbeat rate only
• CPC Class Codes: A61M 2230/202 partial carbon oxide pressure, e.g. partial dioxide pressure (P-CO2)
• CPC Class Codes: A61M 2230/205 partial oxygen pressure (P-O2)
• CPC Class Codes: A61M 2230/30 Blood pressure A61M2230/04 takes precedence
• CPC Class Codes: A61M 2230/42 Rate
• CPC Class Codes: A61M 2230/50 Temperature

Abstract

Embodiments of the present invention relate to a system and method for automatically controlling a physiologic parameter of a patient. Specifically, embodiments of the present invention include delivering a gas mixture to the patient and monitoring at least one physiologic parameter of the patient, detecting whether a physiologic delay exists between delivering the gas mixture and detection of a corresponding response to delivering the gas mixture, and automatically controlling the delivery of the gas mixture based on whether the delay is detected and based on a value of the physiologic parameter.

Claims

1. A method for automatically controlling blood oxygen saturation in a patient, comprising:

delivering a gas mixture to the patient;

monitoring at least one physiologic parameter of the patient;

determining a physiologic delay between delivering the gas mixture and detection of a corresponding response to delivering the gas mixture; and

automatically controlling the delivery of the gas mixture based at least in part upon the delay detected and based on a value of the physiologic parameter.

2. The method of claim 1, wherein the gas mixture is delivered at least in part via an endotracheal tube, laryngeal mask airway, face mask, nasal pillow, nasal canula, or any combination thereof.

3. The method of claim 1, wherein the at least one physiological parameter comprises a blood oxygenation level, a tissue carbon dioxide level, a heart rate, a blood pressure level, a respiration rate, a tissue oxygenation level, or any combination thereof.

4. The method of claim 1, wherein determining the physiologic delay comprises estimating an amount of the physiologic delay.

5. The method of claim 1, comprising receiving an indication of physiologic delay from a sensor.

6. The method of claim 1, wherein determining the physiologic delay comprises receiving a sensor identification code, a temperature, a pulse amplitude, or location coordinates.

7. The method of claim 1, wherein determining the physiologic delay comprises detecting oscillations in the at least one physiologic parameter.

8-23. -23. (canceled)

24. A gas supply device for automatically controlling blood oxygen saturation in a patient, comprising:

means for delivering a gas mixture to the patient;

means for monitoring at least one physiological parameter of the patient;

means for determining a physiological delay between delivering the gas mixture and detection of a corresponding response to delivering the gas mixture; and

means for automatically controlling the delivery of the gas mixture based at least in part upon the delay detected and based on a value of the physiological parameter.

25. The gas supply device of claim 24, wherein the means for delivering the gas mixture comprises an endotracheal tube, laryngeal mask airway, face mask, nasal pillow, nasal canula, or any combination thereof.

26. The gas supply device of claim 24, wherein the at least one physiological parameter comprises a blood oxygenation level, a tissue carbon dioxide level, a heart rate, a blood pressure level, a respiration rate, a tissue oxygenation level, or any combination thereof.

27. The gas supply device of claim 24, wherein the means for determining the physiological delay comprises means for establishing an amount of the physiological delay.

28. The gas supply device of claim 24, comprising means for receiving an indication of physiological delay from a sensor.

29. The gas supply device of claim 24, wherein the means for determining the physiological delay comprises means for receiving a sensor identification code, a temperature, a pulse amplitude, or location coordinates.

30. The gas supply device of claim 24, wherein the means for determining the physiological delay comprises means for detecting oscillations in the at least one physiological parameter.