Information about Pulse oximeter

The Pulse oximeter is a medical device that measures the oxygen content of a patient's arterial blood, providing a method of measuring oxygen saturation or arterial hemoglobin saturation in a non-invasive manner. It also detects arterial pulsation and therefore also calculates and informs the patient's heart rate. Let's take a look at the Pulse oximeter for more information.

Here is the content:

l Basic Function

l Principle of measurement

l Population

l Main components

Basic Functions

In addition to heart rate, blood pressure, respiratory rate, and temperature, pulse oximetry (PO) is considered to be the 5th most critical indicator of health status. Hemoglobin (Hb) is an essential component of blood cells and is responsible for transporting oxygen from the lungs to other tissues in the body. The amount of oxygen contained in hemoglobin at any given moment is called oxygen saturation. Oxygen saturation is expressed as a percentage and is the ratio of the oxygen content of hemoglobin to the oxygen-carrying capacity of hemoglobin. Oxygen saturation is an important physiological parameter that reflects the normal respiratory function and oxygen content of the body, and it is an important physiological parameter that shows whether the tissues of our body are healthy or not. Severe hypoxia can directly lead to asphyxia, shock, death, and other tragic occurrences. In Europe and the United States and other developed countries, people attach great importance to the monitoring of blood oxygen, Pulse oximeter has high popularity.

Measurement principle

Based on the change in the amount of light absorption during an arterial beat. Two light sources located in the visible red spectrum (660 nm) and the infrared spectrum (940 nm) are alternately illuminated on the tested area (typically the fingertip or earlobe). The amount of light absorbed during these pulsations is related to the oxygen content of the blood. The microprocessor calculates the ratio of these two absorbed spectra and compares the results with a table of saturation values present in memory to obtain the oxygen saturation of the blood.

A typical Pulse oximeter sensor has a pair of LEDs that pass through a translucent part of the patient's body (usually a fingertip or earlobe) directly in front of a photodiode. One of the LEDs is red, with a wavelength of 660 nm; the other is infrared, with a wavelength of 940 nm. The percentage of blood oxygen is calculated by measuring these two wavelengths of light with different absorption rates as they pass through the body.

Applicable people

Patients in the process of emergency and transport, fire rescue, and high-altitude flight must monitor blood oxygen; heart disease, hypertension, and diabetic patients, especially the elderly will have respiratory problems, and monitoring blood oxygen indicators can be a good understanding of their respiratory, immune system is normal, blood oxygen saturation has become an important physiological indicator of the general family daily monitoring; medical staff in the room and out of the clinic will also be blood oxygen as a must monitor items Patients with respiratory diseases, especially those who snore for a long time and use ventilators and oxygen concentrators, use Pulse oximeters in their daily life to monitor the effectiveness of treatment; outdoor sportsmen, mountain climbers, and sportsmen use Pulse oximeters when they exercise to know their body condition in time and take the necessary protection measures.

Main components

A microprocessor, memory (EPROM and RAM), two digital-to-analog converters to control the LEDs, a device to filter and amplify the signals received from the photodiodes, and an analog-to-digital converter to digitize the received signals for delivery to the microprocessor. the LEDs and photodiodes are placed in small probes in contact with the patient's fingertips or earlobes. The Pulse oximeter typically also includes a small the Pulse oximeter also typically includes a small LCD.

This is the information about the Pulse oximeter. If you are interested in the Anti-Epidemic Covid-19, Pulse oximeter, you can contact us. Our website is www.medtrue.com.