Ventilation Parameter Monitoring Device for CPR Tidal Volume Control
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Solution Overview
Problem
Current manual resuscitators lack the ability to accurately monitor and assist in ventilation parameters, leading to potential lung injury from inappropriate tidal volumes during cardiopulmonary resuscitation, resulting in reduced cardiac output or hypercapnia.
Innovation Solution
A device with a processor, memory, and gas flow sensor that calculates and monitors tidal volumes based on the subject's ideal body weight, providing warnings for deviations from optimal ranges to ensure appropriate ventilation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual resuscitators are used without monitoring functions, then the device complexity is reduced and ease of operation is improved, but measurement precision of ventilation parameters deteriorates and reliability of resuscitation deteriorates
Solution Approach 1:
The patent replaces manual estimation and mechanical measurement methods with electronic sensing and digital processing. A flow sensor electronically measures gas flow rate, and a processor calculates tidal volume from this data, providing precise measurement without complex mechanical components. This substitution achieves accurate tidal volume monitoring while keeping the device relatively simple through electronic rather than mechanical means.
2Ease of operation
If tidal volumes are not accurately monitored, then the ease of operation is improved, but object-affected harmful factors increase due to lung injury from inappropriate ventilation
Solution Approach 1:
The patent implements a feedback system where the flow sensor continuously monitors exhaled gas flow rate, the processor calculates tidal volume in real-time, and the display provides immediate visual feedback to the operator. This closed-loop feedback enables operators to easily maintain appropriate tidal volumes by observing the displayed measurements, preventing lung injury without complicating operation. The system automatically provides guidance information to ensure safe ventilation.
3Reliability
If manual resuscitators lack monitoring functions, then device complexity is reduced, but reliability of resuscitation deteriorates due to hypoventilation or over-distension
Solution Approach 1:
The patent enables the resuscitation system to self-monitor and self-evaluate its performance. The flow sensor and processor automatically track ventilation parameters, calculate tidal volumes, and compare them against safe ranges. This self-service capability ensures reliable resuscitation by continuously verifying that ventilation is appropriate, reducing dependence on operator skill while adding minimal complexity through automated sensing and calculation.
4Reliability
If tidal volume warnings are implemented, then reliability of resuscitation is improved, but device complexity increases due to additional monitoring and alerting functions
Solution Approach 1:
The patent uses parameter changes to simplify the warning system. The processor monitors the tidal volume parameter and automatically generates warnings when values fall outside predetermined safe ranges. By focusing on a single critical parameter (tidal volume) and using simple threshold-based alerting rather than complex multi-parameter analysis, the system achieves improved ventilation reliability with minimal added complexity. The warning function adds only the necessary intelligence to compare one parameter against safe limits.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The device helps maintain accurate tidal volumes, reducing the risk of lung injury and improving cardiac output by alerting users to adjust ventilation accordingly, aligning with American Heart Association recommendations.
Implementation Method 1
a gas flow sensor configured to measure a flow rate of exhaled gas
Data Source
AI summary
The disclosure is directed to an apparatus and a method for improving manual ventilation and resuscitation by monitoring ventilation parameters and assisting resuscitation. The apparatus includes a gas flow sensor configured to measure a flow rate of exhaled gas of a subject. The apparatus is configured to receive an ideal body weight or a predicated body weight of the subject and calculate a first tidal volume range based on the ideal body weight or the predicated body weight of the subject. The apparatus is also configured to obtain an exhaled tidal volume of the subject based on the measured flow rate and determine whether the exhaled tidal volume is within the first tidal volume range. When it is determined that the exhaled tidal volume is not within the first tidal volume range, the apparatus is further configured to perform a first tidal volume warning.