Detachable Ventilator Water Trap for Gas Analysis Accuracy

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Solution Overview

Problem

Existing ventilators face challenges in maintaining defined settings for respiratory gases and moisture levels, leading to issues with operational reliability and accuracy, particularly in clinical and home environments.

Innovation Solution

A ventilator system with a detachable water trap and integrated sensors, including a pressure sensor and flow sensor, that generates a predeterminable negative pressure to convey a defined gas flow to the gas analyzer, with a read/write device recognizing memory modules to adjust the suction unit and ensure accurate gas analysis.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If a water trap is installed upstream of the gas analyzer to remove excess moisture, then the accuracy of gas analysis is improved, but the device complexity increases due to additional components and detachable connections

Engineering Contradiction:
Improvegas analysis accuracyVSAvoidsystem complexity
Core Design Contradiction:
Measurement precisionVSDevice complexity

Solution Approach 1:

The water trap is designed as a detachable, modular component that can be separately connected to the gas conducting line upstream of the gas analyzer. This segmentation allows the moisture removal function to be isolated from the main ventilator system, improving gas analysis accuracy while managing complexity through modular design.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The water trap acts as an intermediary component between the gas conducting line and the gas analyzer. It mediates the gas flow by removing excess moisture before the gas reaches the analyzer, thereby improving measurement precision without requiring direct modification of the analyzer itself.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Ease of operation

If a detachable water trap with multiple connections is used, then the ease of operation is improved through removable maintenance, but the reliability may worsen due to potential connection issues

Engineering Contradiction:
Improvemaintenance accessibilityVSAvoidconnection reliability
Core Design Contradiction:
Ease of operationVSReliability

Solution Approach 1:

The water trap is designed as a detachable component with separate connections to the gas conducting line and the gas analyzer. This segmentation enables easy removal and maintenance of the water trap without disassembling the entire system, improving ease of operation while maintaining reliable connections through dedicated connection points.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The water trap includes a water reservoir that can be removed and emptied before water levels become problematic. This beforehand maintenance capability prevents potential connection issues and ensures reliable operation by allowing proactive clearing of accumulated condensation.

Inventive Principle:
Principle #11Beforehand cushioning (Prior cushioning)

3Quantity of substance

If the water trap includes a water reservoir and withdrawal point, then the moisture management capability is improved, but the device complexity increases due to additional structural components

Engineering Contradiction:
Improvewater storage capacityVSAvoidstructural complexity
Core Design Contradiction:
Quantity of substanceVSDevice complexity

Solution Approach 1:

The water trap incorporates a dedicated water reservoir as a separate structural component with a withdrawal point. This segmentation allows the water storage and removal function to be clearly distinguished from the gas flow path, improving moisture management capability while managing structural complexity through functional separation.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The water reservoir acts as an intermediary storage component within the water trap, capturing condensation from the gas flow and providing a controlled withdrawal point. This mediates the moisture management process by separating water accumulation from the main gas conducting line.

Inventive Principle:
Principle #24Intermediary (Mediator)

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

Enhances operational reliability and accuracy by ensuring consistent gas flow and moisture management, triggering alarms for deviations and enabling precise analysis through the use of sensors and memory module recognition.

Implementation Method 1

the suction unit generates a predefinable negative pressure and thus conveys a gas flow from the hose system via the water trap to the gas analyzer

Methodology Applied
Scientific EffectNegative pressure: Pressure Gradient

Implementation Method 2

the suction unit has a pressure sensor and/or flow sensor for determining the negative pressure and/or a gas flow

Methodology Applied
Scientific EffectPressure sensing: Pressure Gradient

Implementation Method 3

the suction unit has a pressure sensor and/or flow sensor for determining the negative pressure and/or a gas flow

Methodology Applied
Scientific EffectFlow sensing: Flow Separation

Data Source

PatentEP3649936B1Water trap for a ventilator and ventilator with water trap
Publication Date: 2023.03.29 LOWENSTEIN MEDICAL TECH SA
  • EP3649936B1 patent drawingFigure 1
  • EP3649936B1 patent drawingFigure 2
  • EP3649936B1 patent drawingFigure 3

AI summary

The invention relates to a ventilator with a gas analyzer and a tubing system for a gas-conducting connection from the ventilator to a patient and to the gas analyzer, characterized in that the tubing system has a tap to which a water trap is detachably connected, wherein the water trap has a connecting means for connection with the tap, wherein the connecting means transitions into a tube that enables a gas-conducting connection from the tubing system to the water trap, wherein the tube is connected to the water trap, and wherein the water trap has a front section and a rear section facing the ventilator, wherein the ventilator has a receptacle for the water trap for detachable connection with the water trap.wherein the water trap is connected to the ventilator via a gas conductor and wherein the gas analyzer is connected to the intake and the water trap via a gas conductor, wherein the gas analyzer has a suction unit which is configured to deliver a defined gas flow from the tubing system via the water trap to the gas analyzer.