How to measure Volume with a Flow Meter

One way to use a trigger to measure the volume of a gas is to use a flow meter that is equipped with a trigger function. In this type of system, the trigger can be used to start and stop the flow of gas through the flow meter. The flow meter will then measure the […]

January 6, 2023
A new flow sensor system utilizes AI algorithms to improve accuracy and reduces costs

In the following article you will information about a new gas flow sensor that uses AI algorithms to save costs. Gas flow measurement algorithms can compensate for environmental factors such as temperature, humidity, and ambient pressure to improve accuracy. For example, a look-up table with over 200,000 support points can be compressed using an artificial […]

January 6, 2023
What everyone must know about Gas Standards

Various gas standards are used when working with medical devices. That is why gas flow analyzers support the conversion vaious gas standards. What exactly are gas standards? Gas standards describe the gas volume (e.g. Tidal Volume) at specific conditions. These conditions include temperature, pressure, and humidity. Imagine a balloon, filled with air. The air within […]

October 14, 2022
Flow Measurement using Pneumotachograph Principle

A pneumotachograph flow sensor converts the flow of gases through it into a proportional signal of pressure difference on either side of a central mesh whose design ensures a signal linearity over a range of flow rates. Using a differential pressure sensor, the pressure drop over the mesh is measured. With this measurement and a […]

October 11, 2022
Adaptive Leak-Flow Compensation for Volume Measurement in Gas Flow Analyzers

As described here, manual adjustment of a baseflow might be a cumbersome process. It requires multiple steps which must be repeated every time if the intentional leak or the ventilator settings are changed. To simplify daily work, the FlowAnalyser PRO offers adaptive baseflow adjustment to compensate for leakage automatically. But how does it work? The […]

November 23, 2021
Automatic Breath Detection in Gas Flow Analyzers

From Matthias van der Staay. Correctly selected trigger settings in a ventilator tester are important for the measurement accuracy of breath-based parameters in medical ventilators such as tidal volume, minute volume or breath rate. Depending on the patient circuit configuration and the selected ventilation mode or settings, adjustments to the trigger settings are usually required. […]

November 2, 2021
Test Automation for Ventilators

The CITREX H5 ventilator analyser supports users with Apps for testing and calibrating their devices. The Apps enable safe and fast testing. Entire test sequences are displayed with images and texts, and measured automatically. The test results are recorded in a PDF report, which can be signed directly on the screen. Several ventilator manufacturers such […]

March 17, 2021
Test of COVID Ventilators

COVID-19 is causing respiratory problems for a multitude of patients and is directly affecting hospitals, especially Intensive Care Units (ICU), where in many cases there are not enough mechanical ventilators to help patients to breathe. DEKRA laboratories are working on various projects of ventilator system manufactures. As these medical devices need to be assessed to […]

February 23, 2021
Leak Flow Compensation for Volume Measurement

What should be considered when measuring inhalation (Vti) and exhalation (Vte) volumes of ventilators with an intentional leak?For precise measurement of the tidal volumes, the leak flow must be compensated. An intentional leak, at the patient’s mouth, falsifies the inhalation and exhalation volumes. Intential leaks are common in non-invasive ventilators for CO2 washout. The leakage […]

February 23, 2021
ISO 17025 accredited calibration laboratory

With comparative measurements and a management system in accordance with the SN EN ISO/IEC 17025 standard assessed on a regular basis by EURAMET, METAS provides proof of its metrological competence within the framework of the “Mutual recognition of national measurement standards and of calibration and measurement certificates issued by national metrology institutes» (CIPM MRA).  The […]

February 23, 2021
Verifying Ventilator Operation with Gas Flow Analyzer

All ventilators should be tested after each use to verify performance before the unit is used for another patient. Ideally, a complete operational verification procedure, established by the facility and usually based on the manufacturer’s recommendations, will be performed each time. These procedures should be described in a facility’s policies and procedures. Find more about […]

February 22, 2021
What impact do Gas Standards on Flow or Volume measurements?

Feedback from biomedical engineers has shown us that many measurement errors of flow are caused by a mismatch between the gas standards used by the device under test (e.g. a medical ventilator) and the gas flow analyzer used for flow and volume testing. Keep in mind both devices are measuring the same gas flow but […]

September 24, 2020