Smart oxygenation system employing automatic control using SpO2-to-FiO2 ratio

US10589045B2 · kind B2 · utility

Inventors

• Michael Kinsky · League City, US
• Rich Branson · Cincinnati, US
• George Kramer · Westbury, US
• Muzna Khan · Webster, US
• Jay Johanningman · Cincinnati, US
• Jose Salinas · San Antonio, US
• Nehemiah T. Liu · San Antonio, US

Key dates

• Filing date: Oct 4, 2017
• Grant date: Mar 17, 2020
• Expiry date: Sep 4, 2038

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61M2240/00
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A system for assessing lung function in a patient is enclosed. The oxygen delivery system in the system (e.g., a ventilator or portable standalone system) preferably includes an oximeter sensor for receiving SpO2 from a patient. The assessing lung function in a patient includes an FiO2 adjust algorithm operable in logic circuitry in the ventilator that can control an oxygen fraction FiO2 provided to the patient in a closed loop fashion. In a preferred example, the algorithm controls FiO2 using the SpO2, but also displays a ratio of SpO2-to FiO2 (S/CLCF) as a function of time. One or more S/CLCF ratio threshold may be used to allow the clinician and/or the algorithm to understand a degree of lung injury, and to allow the algorithm to adjust FiO2 appropriately. Preferably, the algorithm keeps SpO2 to a range of 88-95%.