What is pulse oximetry?
A pulse oximeter test may be performed on the finger to read blood flow. All systems and organs in the body need oxygen to survive. Without oxygen, cells do not function properly and eventually die. Cell death can cause serious symptoms and eventually lead to organ failure.

The body filters oxygen through the lungs and transports it to the organs. The lungs then distribute oxygen from the blood through the hemoglobin protein in the red blood cells. This protein provides oxygen to the rest of the body. A pulse oximeter measures the proportion of oxygen in the hemoglobin protein, called oxy saturation. Oxygen saturation usually indicates how much oxygen is reaching the organ. Normal oxygen saturation is 95-100%. Oxygen saturation below 90% is considered abnormally low and maybe a clinical emergency. 

How does it work?
Oxygen is distributed in red blood cells.
A pulse oximeter is a clip-on device that measures oxygen saturation. The device can be placed on the finger, wrist, leg, or anywhere the device can read blood flow.

Oxygen saturation can decrease for several reasons, including:

choke
choke
infections such as pneumonia
drowning
Diseases such as emphysema, lung cancer, and lung infections
inhalation of toxic chemicals
History of heart failure or heart attack
allergic reaction
anesthesia
sleep apnea
Pulse oximeters work by shining light on a relatively transparent area of ​​the skin. The light hits the sensor on the other side of the skin.

For example, when you hold a pulse oximeter on your finger, light is emitted from one side of the clip and detected from the other side. The amount of light absorbed by the blood indicates its oxygen saturation. Pulse oximeters do not directly measure oxygen saturation, but use complex equations and other data to estimate actual levels. 

Benefits of Oximeter
A pulse oximeter is useful for people with conditions that affect oxygen saturation. For example, a sleep specialist may recommend a pulse oximeter to monitor oxygen saturation during the night in people with sleep apnea or severe snoring. Pulse oximeters can also provide feedback on the effectiveness of breathing measures such as oxygen therapy and ventilators.

Some doctors may use a pulse oximeter to assess the safety of physical activity in people with cardiovascular or respiratory problems or may recommend wearing a pulse oximeter during exercise. Your doctor may also use a pulse oximeter as part of a stress test.

Some hospitals use pulse oximeters for particularly vulnerable patients. For example, a baby in a neonatal intensive care unit may wear a pulse oximeter that alerts staff to low oxygen saturation.

Decreased oxygen saturation in infants in neonatal intensive care units can be detected using a pulse oximeter. A few advantages of pulse oxygens:

Monitoring oxygen saturation over time
A low level of oxygen, especially the dangerous warnings of the newborn
Peace for people with chronic breathing or cardiovascular condition.
Evaluation of additional oxygen requirements
Anesthesia checks the level of oxygen saturation level
It represents the dangerous side effects of those using drugs that affect the breathing or saturation of oxygen.
Pulse infections can be purchased online at present, so they can be used by some people without risk factors.

Some companies are currently selling pulse oxygens for the parents of small babies. While these devices promise peace of mind for parents concerned about sudden infant death syndrome (SIDS) and sleep accidents, there are no studies to support claims that they prevent SIDS or accidents.

What to expect?
Pulse oximetry devices are non-invasive and do not pose anydanger. Some people experience mild irritation, including redness and skin sensitivity.

Wearing it too tight and using it for a long time can cause the pulse oximeter to block oxygen from the surrounding blood vessels. People with numbness, itching, or discoloration of the skin should see a doctor immediately.

The main danger of pulse oximetry is incorrect readings. The accuracy of a pulse oximeter depends on proper installation, and small changes in position can result in inaccurate readings. A person knocked over while sleeping can disconnect the device and set off a false alarm. Oxygen saturation may decrease in the short term due to changes in sleep status or other factors such as shortness of breath. A pulse oximeter warns you even if the fall is temporary and harmless. For people with health problems or who have not been helped by doctors to understand the role of the pulse oximeter, this may be an unnecessary concern.

Conversely, a pulse oximeter can give some people a false sense of security. It does not provide warnings of all possible oxygen problems and does not replace any other form of monitoring.

People who use a pulse oximeter should discuss the risks with their doctor and monitor the readings over time. Changes in size, especially with environmental changes, sometimes indicate health problems.

Those interested in using a consumer pulse oximeter should discuss their plans with their doctor before investing in the device. 

Limitations of an Oximeter
Several factors can reduce the accuracy of pulse oximeter readings, including:

momentum change
Carbon monoxide poisoning that pulse oximeters may not warn about
bilirubin levels
plasma lipids
Ambient light or color interference, including nail polish
If the hands are cold or the blood circulation is poor
Individuals using pulse oximeters to monitor oxygen saturation should not rely on oximeters as a substitute for subjective experience.

People who have shortness of breath, shortness of breath, dizziness, or other symptoms of lack of oxygen should see a doctor.