Application of Micro Diaphragm Pump in Exhalation Analyzer

With the development of medical technology, the detection methods for diseases are becoming more and more convenient and accurate. Today I will introduce to you: end tidal carbon dioxide (ETCO2) monitoring.

This test is a non-invasive, simple, real-time and continuous functional monitoring indicator. With the miniaturization of monitoring equipment, the diversification of sampling methods, and the precision of monitoring results, ETCO2 has been more and more widely used in clinical work in the emergency department. At present, there are still many confusions in the selection and clinical application of ETCO2 monitoring methods, so this consensus is formulated in order to standardize and improve the understanding and clinical application of ETCO2 monitoring in the field of emergency medicine in my country.

Working Principle :

ETCO2 monitoring methods include absorbance photometry, chromogenic method, mass spectrometry, Raman scattering analysis and so on. Absorption photometry is the most commonly used clinically. Using the characteristic that carbon dioxide absorbs infrared rays with a wavelength of 4.26 μm, the concentration of carbon dioxide is calculated by monitoring the attenuation intensity of infrared rays. The colorimetric method detection device utilizes the principle that carbon dioxide meets water to form carbonic acid, allowing the exhaled breath containing water vapor to pass through the acid-base indicator, and the color change of the indicator indicates the presence of carbon dioxide.

Application Difficulties:

1. On-line monitoring requires micro-pumps to run continuously day and night, with long life and no downtime for maintenance; therefore, the requirements for the life of the micro diaphragm pump are relatively high. If the life is short, the overall maintenance will take more time, and the product will not be guaranteed. .

2. Stable air flow. For detection, if the air flow fluctuates greatly, it will have a certain impact on the detection data. Therefore, the stable flow of the micro diaphragm pump is an important condition to ensure the accuracy of detection.

3. Low noise. The breath analyzer is mainly used in quiet environments such as hospital departments and inpatient departments, so it is necessary to ensure a good noise environment. If the noise of the micro diaphragm pump is too large, the micro diaphragm pump needs to ensure a good noise environment when used in the hospital environment. , to avoid excessive sound.

4. Small size. One of the main characteristics of the current breath analyzer is small size and portability. Therefore, the volume requirements for the overall internal components are relatively high, and the size control of the micro diaphragm pump is quite strict. Therefore the micro diaphragm pump needs to be easy to install.

Our Solutions of Micro Diaphragm Pump:

Our company has two series of vacuum pumps: V series and C series, both of which can meet difficult needs.

C15 vacuum pump series:

Product advantages: small size – the weight of the product is about 50g, and the overall  size is about 50x29x36mm.

2. Working indicator light

The pump bottom shell is made of light-transmitting ABS material, which can directly reflect the working status of the micro diaphragm pump through the indicator light.

3. Speed control function

The flow can be varied by adjusting the pump’s motor speed (by adjusting the PWM duty cycle). Or adjust the speed by ordering our company’s special speed controller for micro pumps (model: TS-G12).

4. Brushless motor

Using high-quality brushless motor, it has the advantages of long lifetime, low interference and high reliability.