Methods, devices, and systems for improved oxygenation patient monitoring, mixing, and delivery
Inventors
Assignees
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Publication Number
US-12582796-B2
Publication Date
2026-03-24
Expiration Date
Abstract
A computer implemented method is disclosed for providing adaptive control of a gas mixture for delivery to a patient via a separate external gas blender system. The computer implemented method includes receiving first SpO2 data from a regional oximeter via a regional oximeter interface; determining first PaO2 data using a first lookup table derived from a first sigmoid shaped oxyhemoglobin dissociation curve; determining a first gas mixture value using the first PaO2 data; and transmitting first adaptive feedback control data including the first gas mixture value to the separate external gas blender system via a gas blender interface.
Core Innovation
The disclosed system and computer-implemented method control a gas blender system to deliver a gas mixture with a target FiO₂ to a patient. The system receives a user-provided target PaO₂ and SpO₂ measurements from a pulse oximeter and a regional oximeter configured to measure cerebral blood oxygen saturation. Lookup tables derived from sigmoid-shaped oxyhemoglobin dissociation curves convert the measurements to PaO₂ values to determine oxygen mixer control values.
The system outputs the control value associated with a selected operating mode to a blender controller to deliver the gas mixture with the target FiO₂. The disclosure also describes switching between oximeter modes, gas heating and humidification, monitoring, and alarms. The problem being solved and motivating circumstances are not explicitly described in patent.
Claims Coverage
Claims 1 and 11 are independent claims directed to a gas-blender control system and a computer-implemented method for controlling a gas blender system. They cover two inventive features.
Dual-oximeter gas-blender control system
Claim 1 recites a processor and memory that receive a user-provided target PaO₂ and SpO₂ measurements from a pulse oximeter and a regional oximeter. The processor converts each measurement to PaO₂ using a respective lookup table derived from a sigmoid-shaped oxyhemoglobin dissociation curve, determines oxygen mixer control values by processing error values using an algorithm with at least one of proportional, integral, or derivative values, and outputs the control value associated with the operating mode to deliver the gas mixture with the target FiO₂.
Computer-implemented gas-blender control method
Claim 11 recites receiving a user-provided target PaO₂ and SpO₂ measurements from a pulse oximeter and a regional oximeter configured to measure cerebral blood oxygen saturation. The method converts each measurement to PaO₂ using a respective lookup table derived from a sigmoid-shaped oxyhemoglobin dissociation curve, determines oxygen mixer control values by processing error values using an algorithm with at least one of proportional, integral, or derivative values, and outputs the control value according to the operating mode.
The independent claims cover system and method forms of controlling gas-blender delivery using converted measurements from pulse and regional oximeters, error processing, and mode-dependent control.
Stated Advantages
Not explicitly described in patent.
Documented Applications
Controlling a gas blender system to deliver a gas mixture with a target FiO₂ to a patient.
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