Noninvasive Ventilator Sputum Excretion Automation
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Solution Overview
Problem
Patients using non-invasive ventilators face challenges with sputum excretion, leading to increased reliance on invasive ventilation and associated complications, as current methods like mechanical insufflation-exsufflation lack automation and integration with ventilator parameters, resulting in inefficiencies and potential barotrauma.
Innovation Solution
A non-invasive ventilator system that automatically initiates and stops sputum excretion based on oxygen saturation, airway resistance, lung compliance, and breath sounds, using positive and negative pressure ventilation, and optionally includes nebulization and intrapulmonary percussion to aid in sputum clearance, integrated within the ventilator to reduce manual intervention and parameter misalignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mechanical insufflation-exsufflation equipment is used to help patients excrete sputum, then sputum excretion ability is improved, but device complexity increases and requires separate equipment operation
Solution Approach 1:
The patent integrates the mechanical insufflation-exsufflation function directly into the non-invasive ventilator system. The ventilator's control unit coordinates with the MIE equipment to automatically initiate sputum excretion cycles, combining two separate functions into a unified system that reduces operational complexity while maintaining improved sputum excretion capability.
Solution Approach 2:
The non-invasive ventilator is enhanced to perform multiple functions: normal mechanical ventilation, sputum excretion assistance, and automatic coordination with MIE equipment. This multi-functional design eliminates the need for separate dedicated devices and simplifies overall system operation.
2Reliability
If manual percussion and sputum drainage are used, then sputum loosening is improved, but sputum excretion efficiency remains limited due to dependence on patient's own cough
Solution Approach 1:
The patent implements continuous positive pressure ventilation during the inspiratory phase to maintain sustained airflow that continuously promotes sputum movement. This continuous action complements the periodic MIE cycles, ensuring constant assistance in sputum excretion rather than relying solely on intermittent patient coughing efforts.
3Reliability
If MIE equipment parameters are independently set, then sputum excretion can be achieved, but barotrauma risk increases due to lack of coordination with ventilator parameters
Solution Approach 1:
The control unit continuously monitors ventilator operation parameters and automatically adjusts MIE equipment settings in response. This feedback mechanism ensures that MIE parameters are coordinated with the ventilator's actual performance, preventing excessive pressure variations that could cause barotrauma while maintaining effective sputum excretion.
Solution Approach 2:
The patent implements dynamic parameter coordination where the MIE equipment settings are not fixed but automatically adjusted based on real-time ventilator operation. The control unit modifies MIE parameters dynamically to match the ventilator's actual delivery characteristics, ensuring safe and effective sputum excretion throughout the ventilation cycle.
4Ease of operation
If sputum excretion is performed without automatic control, then manual operation is simpler, but medical personnel workload increases due to continuous judgment requirements
Solution Approach 1:
The control unit automatically monitors patient parameters and initiates sputum excretion cycles without requiring continuous manual intervention. The system self-regulates by detecting when sputum excretion is needed and coordinating the ventilator and MIE equipment accordingly, freeing medical personnel from continuous monitoring while maintaining appropriate operation simplicity.
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
Improves the success rate of non-invasive ventilation, reduces the need for invasive ventilation, enhances patient care and quality of life, and decreases medical resource waste by automating sputum excretion and linking it with ventilator parameters to prevent barotrauma.
Implementation Method 1
It applies a large positive pressure to the patient during an inspiratory phase to make the patient inhale deeply
Implementation Method 2
then quickly converts to a negative pressure to prompt the patient to produce a large expiratory flow to bring out the sputum
Implementation Method 3
The non-invasive ventilator further includes a nebulizer unit and/or an intrapulmonary percussive unit
Implementation Method 4
The non-invasive ventilator further includes a nebulizer unit and/or an intrapulmonary percussive unit
Data Source
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AI summary
An auxiliary sputum excretion method for an invasive ventilator and the invasive ventilator, solving the technical problem of how to help an invasive ventilation patient excrete sputum. In the auxiliary sputum excretion method for the invasive ventilator, during a normal mechanical ventilation of the invasive ventilator for a patient, after judging that the patient needs to excrete sputum, the operation of sputum excretion is initiated in each respiratory cycle of the patient until it is judged that the patient needs o to stop excreting sputum. The noninvasive ventilator comprises an inspiratory limb (2), an expiratory limb (3), positive pressure and negative pressure gas sources, a sensor unit (4) and a control unit (5). The sensor unit (4) monitors physiological data for judging whether the patient needs to excrete sputum and whether the patient needs to stop excreting sputum. The control unit analyzes the physiological data monitored by the sensor unit to judge whether the patient needs to excrete sputum and whether the patient needs to stop excreting sputum, and after judging that the patient needs to excrete sputum, controls the positive pressure gas source and the negative pressure gas source to perform the operation of sputum excretion until it is judged that the patient needs to stop excreting sputum.