Anesthesia Machine Superimposed Ventilation Frequencies
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Solution Overview
Problem
Conventional ventilation modes, such as high-frequency jet ventilation, may not fully remove carbon dioxide in patients with severe obstructive and/or restrictive lung disease, necessitating an improvement in carbon dioxide elimination during anesthesia.
Innovation Solution
An anesthesia machine and ventilation control method that provide respiratory support by superimposing two different ventilation frequencies, allowing the first gas to be delivered at both a first ventilation frequency and a second ventilation frequency, with the option to simultaneously provide the gas at both frequencies during inspiratory phases, enhancing carbon dioxide elimination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If high-frequency jet ventilation is used to reduce surgical site movement, then gas exchange is maintained, but carbon dioxide elimination is insufficient in severe lung disease patients
Solution Approach 1:
The patent combines high-frequency jet ventilation and normal-frequency positive pressure ventilation into a composite ventilation mode. The high-frequency component reduces surgical site movement while the normal-frequency component ensures adequate carbon dioxide elimination, resolving the contradiction between minimizing disturbance and maintaining elimination efficiency.
Solution Approach 2:
The system dynamically adjusts ventilation parameters including frequency, tidal volume, and driving pressure based on patient condition and surgical requirements. By changing these parameters, the system optimizes both surgical site stability and carbon dioxide elimination rate for different clinical scenarios.
2Ease of operation
If conventional tracheal intubation is used, then ventilation can be provided, but it conflicts with surgical operation and otolaryngologist observation in central airway surgeries
Solution Approach 1:
The ventilation system is segmented into independent high-frequency and normal-frequency components that can be separately controlled and adjusted. This segmentation allows the system to adapt to different surgical requirements while maintaining ventilation functionality.
3Stability of the object's composition
If high-frequency jet ventilation with lower tidal volume is used, then gas exchange is maintained, but carbon dioxide removal is insufficient in severe obstructive and restrictive lung disease
Solution Approach 1:
The patent merges high-frequency jet ventilation and normal-frequency positive pressure ventilation into a composite mode where both ventilation types work synergistically. The high-frequency component maintains gas exchange while the normal-frequency component with higher tidal volume ensures adequate carbon dioxide elimination in severe lung disease patients.
Solution Approach 2:
The ventilation approach uses a composite of two different ventilation frequencies and mechanisms, analogous to composite materials in engineering. This composite ventilation strategy leverages the advantages of both high-frequency and normal-frequency ventilation to achieve both gas exchange maintenance and adequate carbon dioxide removal.
Data Source
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AI summary
An anesthesia machine, a respiratory support device, and a ventilation control method are provided by this disclosure. The ventilation module provides a first gas at a first ventilation frequency and a second ventilation frequency, respectively. When the ventilation module provides the first gas to a patient at the second ventilation frequency, the ventilation module can simultaneously provide the first gas to the patient at the first ventilation frequency in at least one of the multiple second inspiratory phases. In this way, this disclosure provides respiratory support for a patient by superposing ventilation modes of two different frequencies, thereby improving an elimination rate of carbon dioxide, when providing the respiratory support for the patient.