Compensation for unmeasurable inspiratory flow in a critical care ventilator

a ventilator and inspiratory flow technology, applied in the direction of valve details, valve arrangements, life-saving devices, etc., can solve the problems of unmeasurable inspiratory and expiratory phase volume measurement reliability, unnecessary alarm conditions in the ventilator, and nebulizer gas flow to the gas flow from the ventilator can create problems,

Inactive Publication Date: 2011-07-28
GENERAL ELECTRIC CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0005]The present disclosure relates to a method and system for operating a ventilator to compensate for external gas flows being provided to the patient downstream from the ventilator. The method and system allows the ventilator to compensate for the external gas flow rates without having to receive any information directly from the external device delivering the additional gas flow.

Problems solved by technology

Although the use of a nebulizer to introduce a nebulized agent into the flow of gas to the patient functions well to deliver the nebulized agent, the addition of the nebulizer gas flow to the gas flow from the ventilator can create problems.
The increased volume of the expiratory gas flow can lead to unnecessary alarm conditions in the ventilator.
Without some type of compensation for the flow provided by the nebulizer or other external device, the ventilator can generate unnecessary alarms, which significantly reduces the reliability of the volumes measured during the inspiratory and expiratory phase.

Method used

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  • Compensation for unmeasurable inspiratory flow in a critical care ventilator
  • Compensation for unmeasurable inspiratory flow in a critical care ventilator
  • Compensation for unmeasurable inspiratory flow in a critical care ventilator

Examples

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Embodiment Construction

[0013]FIG. 1 illustrates a typical configuration of a ventilation system for providing a flow of ventilation gas to a patient 10. A ventilator 12 provides a flow of ventilation gas through an inspiratory limb 14 to the patient 10 through a patient conduit 16. Exhaled gases from the patient travel through the patient conduit 16 and through an expiratory limb 18 back to the ventilator 12. The expired gases from the patient are vented to atmosphere as indicated by the ventilation discharge 20. The inspiratory limb 14 and the expiratory limb 18 are connected to the patient conduit 16 through a wye piece 22. The patient can receive the flow of ventilation gas through various different interfaces such as a gas mask or a tracheal tube.

[0014]In the embodiment shown in FIG. 1, a nebulizer 24 is provided to medicate the patient on the ventilator. The nebulizer 24 introduces aerosolized medical agent into the flow of gas from the ventilator 12 in the inspiratory limb 14. The nebulized medical ...

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Abstract

A system and method for operating a ventilator to compensate for external gas flow reaching a patient from an external device, such as a nebulizer. A control unit of the ventilator monitors the gas flow rate from the ventilator and compares the gas flow rate from the ventilator to an expired gas flow rate from the patient. The difference between the inspired flow rate and the expired flow rate is due to the external device. The control unit modifies the operation of the ventilator to compensate for the external gas flow rate such that the flow of gas reaching the patient is maintained at a desired level.

Description

BACKGROUND OF THE INVENTION[0001]The present disclosure generally relates to a method and system for providing ventilator therapy to a patient. More specifically, the present disclosure relates to a method of adjusting the operation of a ventilator to compensate for the flow of gas created by an external gas source, such as a nebulizer, to improve the ventilation therapy.[0002]Clinicians commonly utilize a nebulizer to provide aerosoled drug delivery to a patient that is connected to a ventilator. Nebulizers are typically placed in the inspiratory limb of a patient circuit and are used to inject an aerosoled drug directly into the flow stream of the breathing gases for the patient. Nebulizers are typically pneumatic or ultrasonic technology-based devices that are run continuously for a period of time until delivery of discrete doses of the drug or agent have been completed.[0003]When utilizing a pneumatic nebulizer, the nebulized agent supplied to the patient is received from the ne...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): A61M11/00A61M16/00
CPCA61M11/00A61M16/0051A61M16/12A61M16/202A61M2016/0039A61M2016/0042A61M16/0057A61M16/14A61M16/0833A61M16/024
Inventor HUNSICKER, PAULSTEPHENSON, MATTHEW MICHAELPAYNE, JESSICA
Owner GENERAL ELECTRIC CO
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