Anesthesia Respiration Device Pressurizing Component Isolation

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Solution Overview

Problem

Existing anesthesia machines rely on an external driving gas source, limiting their usage and exposing the pressurizing component to patient-exhaled gases and impurities.

Innovation Solution

An anesthesia respiration device with an internal loop circuit and external control branch, where a pressurizing component generates driving gas outside the loop circuit, using filtration and pressure control to manage patient-exhaled gases and provide fresh gas to the patient without direct contact with impurities.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If an external driving gas source is used to drive gas through the reflecting component, then the anesthesia machine can provide respiratory support, but the pressurizing component is exposed to patient-exhaled gases and impurities which reduces reliability

Engineering Contradiction:
Improvepressurizing component reliabilityVSAvoidexposure to patient-exhaled gases and impurities
Core Design Contradiction:
ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The system is divided into separate functional segments: the pressurizing component is isolated in one segment while the reflecting component and patient interface are in another segment. The driving gas is generated separately and introduced into the system without direct contact between the pressurizing component and patient-exhaled gases, thus protecting the pressurizing component while maintaining system functionality.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

A driving gas acts as an intermediary medium that transfers energy from the pressurizing component to the reflecting component without direct contact between the pressurizing component and patient-exhaled gases. The driving gas introduces itself into the system and pushes the reflecting component gas without the pressurizing component being exposed to harmful factors.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Device complexity

If the pressurizing component is placed inside the internal loop circuit to directly pressurize patient-exhaled gas, then gas management is simplified, but the pressurizing component contacts impurities which reduces manufacturing precision and reliability

Engineering Contradiction:
Improvegas management complexityVSAvoidpressurizing component precision
Core Design Contradiction:
Device complexityVSManufacturing precision

Solution Approach 1:

The system separates the pressurizing function from the patient gas circuit. The pressurizing component operates in a clean environment outside the internal loop circuit, while still achieving effective gas management through coordinated control of driving gas introduction and reflecting component operation.

Inventive Principle:
Principle #1Segmentation

3Measurement precision

If the pressurizing component operates outside the internal loop circuit, then it is protected from impurities and maintains accuracy, but the system requires separate connection of fresh gas input and external control branch

Engineering Contradiction:
Improvepressurizing component accuracyVSAvoidconnection structure complexity
Core Design Contradiction:
Measurement precisionVSDevice complexity

Solution Approach 1:

The system accepts the increased connection complexity as a necessary trade-off for protecting the pressurizing component. The fresh gas input and external control branch are separately connected to the internal loop circuit, creating a more complex but cleaner and more reliable system architecture.

Inventive Principle:
Principle #1Segmentation

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

Enables anesthesia machines to operate independently of external gas sources while maintaining the accuracy and functionality of the pressurizing component by isolating it from patient-exhaled gases and impurities, ensuring effective gas management and patient safety.

Implementation Method 1

a drive branch, the drive branch comprises: a pressurizing component for controlling transmission of the patient-exhaled gas in the internal loop circuit to the patient

Methodology Applied
Scientific EffectPressure gradient: Pressure Gradient

Implementation Method 2

at least one of a filter and a flow sensor; wherein an outlet of the filter is connected to the pressurizing component

Methodology Applied
Scientific EffectPhysical filtration: Filter (physical)

Data Source

PatentEP3875135B1Anesthesia respiration device
Publication Date: 2023.08.23 SHENZHEN MINDRAY BIO MEDICAL ELECTRONICS CO LTD

AI summary

An anesthesia respiration device, the device comprising: a fresh gas input (1) for inputting a fresh gas; an internal loop circuit (2) for storing a gas exhaled by a patient and providing the fresh gas and the patient-exhaled gas to the patient; and an external control branch (3) for controlling the internal loop circuit (2). The external control branch (3) comprises a drive branch (31), the drive branch (31) comprising: a pressurizing component (311) for controlling transmission of the patient-exhaled gas in the internal loop circuit (2) to the patient. The fresh gas input (1) and the external control branch (3) are separately connected to the internal loop circuit (2).