DYNAMIC ADJUSTMENT OF TUBE COMPENSATION FACTOR BASED ON INTERNAL CHANGES IN BREATHING TUBE
First Claim
1. A method for adjusting mechanical ventilation delivered to a patient, comprising:
- determining a first tube compensation factor for an invasive breathing tube through which the patient receives mechanical ventilation;
delivering a first appropriate amount of ventilation to the patient based on the first tube compensation factor;
monitoring at least one of;
elapsed time during ventilation to the patient and internal changes in the breathing tube during ventilation to the patient;
determining a second tube compensation factor;
delivering a second appropriate amount of ventilation to the patient based on the second tube compensation factor.
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Accused Products
Abstract
This disclosure describes systems and methods for adjusting a determination of the amount of breathing assistance a patient requires while on a ventilator. In general, in determining the amount of breathing assistance required, the ventilator takes into account an airflow resistance attributable to the tube used to deliver ventilation to the patient'"'"'s lungs. A tube compensation factor is calculated using a tube compensation algorithm, or similar equation. In particular, the tube compensation factor represents the resistance to airflow attributable to the breathing tube itself based on, inter alia, frictional drag, turbulence, and an internal diameter of the tube. Changes in the tube during ventilation impact the calculation of the breathing assistance required by the patient and are accounted for when compensating for the breathing tube.
212 Citations
19 Claims
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1. A method for adjusting mechanical ventilation delivered to a patient, comprising:
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determining a first tube compensation factor for an invasive breathing tube through which the patient receives mechanical ventilation; delivering a first appropriate amount of ventilation to the patient based on the first tube compensation factor; monitoring at least one of;
elapsed time during ventilation to the patient and internal changes in the breathing tube during ventilation to the patient;determining a second tube compensation factor; delivering a second appropriate amount of ventilation to the patient based on the second tube compensation factor. - View Dependent Claims (2, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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3. The method of claim I, wherein monitoring internal changes in the breathing tube during ventilation to the patient comprises:
monitoring changes in an ID of the breathing tube due to biofilm growth within the breathing tube.
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13. A medical ventilator comprising:
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one or more sensors adapted to monitor delivery of respiratory gas through a patient circuit and an invasive breathing tube; a processor that controls the delivery of respiratory gas through the patient circuit and the invasive breathing tube, the processor executing a plurality of software modules including; a tube compensation factor calculation module that dynamically calculates a tube compensation factor associated with the invasive breathing tube during the delivery of respiratory gas by the medical ventilator. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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Specification