SPO2 means saturation of peripheral oxygen which can also be termed a pulse oximeter. A pulse oximeter is a medical device specifically designed to measure the level of oxygen of the blood. It is a noninvasive medical device or measurement instrument that measures the oxygen saturation in a patient’s blood and pulse rates. It is a very simple device and saves a lot of time in going to doctor to have this procedure done. There are many types of oximeters and need to select the one that is appropriate and that fits the needs. Oximeters range from small to large, but the larger ones are used mainly in hospitals The smaller, handheld oximeters and the portable fingertip pulse oximeters are ideal for use at home, even for sport and fitness applications.

The portable pulse oximeters are very convenient and useful as they can be used with no trouble anytime and anywhere. These are clipped ta a translucent part of a patient’s body which can be usually a finger or earlobe, a photodiode is faced with a pair of small light-emitting diodes, which has two different wavelengths {one LED is an infrared and the other is red). Absorption at the said wavelengths differs a lot between oxygenated and deoxygenated blood, thus, making it possible to calculate the ratio between the two. The most widely used types are the finger pulse oximeters which seen attached to the fingertip.

The major reason for applying these is that this device reads the current amount of oxygen present in blood by placing the sensor over the fingertip {or sometimes the earlobe). The exact reading will indicate whether you need to stop your activity, or to have supplemental oxygen. Earlier, doctors mainly had to rely on their clinical eye for the judgment, diagnosis, and evaluation of various medical conditions of the patient, but a major concern, when some symptoms may have unnoticeable be at the late stages of the disease, especially with problems regarding respiration. When patients breathing becomes weaken, arterial blood oxygen levels may quickly fall and deficiency of oxygen may be dangerous and would definitely put patients at risk.

Pulse oximeter is attached to the finger and from there it receives the blood oxygenation and pulse rate reading. These have become very handy as they are portable and efficient to use, thus, making these the most common among its types. Another type is one that is the handheld oximeter. These are models which basically involve the use of a probe. This probe is normally attached, using a special cord, to a unit. When testing, place the probe on your earlobe or finger and then switch on the oximeter.

There are basically four types of these devic*s which are made to cater for one’s medical needs, these are fingertip, wrist, handheld and tabletop models.


Fingertip pulse oximeter is clipped onto a patient’s finger and comes with a tiny computer and screen. This type is very light and portable with ease to store in the pulse or pocket. The clip emits light from one side and measures the light on the other. Its computer is further used to measure the light over several pulses and gives a readout of the patient’s blood-oxygen level. It is very easy to use as one will merely slip the device on the finger and wait for the readings to display on the screen on the face of the fingertip pulse oximeter. This particular type is very easy to operate and is often used at home. The only disadvantage is if the patient’s hand is damaged or his blood flow is slow because of a clot or injury, it may not give an accurate reading or it may not work at all.


This type is very comfortable as it can be made to wear like a watch and the sensor is slid onto a finger. A small wire attaches the two components. These wrist oximeters are used for continuous monitoring and are very popular in sleep centers. These devices are capable of storing up to 24 hours of reading which can be afterward downloaded to a computer.


The handheld type is generally used in almost every hospital. This type is also similar to the fingertip device but has a more versatile clip that connects with a cord to a computer. Similar to as the fingertip, this type uses light to measure the blood’s hemoglobin and clips to patient’s fingertip or earlobe. This device is vital in cases where a patient’s extremities are compromised and may not have full blood flow. Since the earlobe clip is so close to the brain, it is rare to have compromised blood flow. Hence in emergency situations, handheld oximeter is clipped to a patient’s toe which is also recommended by medical practitioners.


Unlike its various models, this particular type is not portable but again have more sensors and features geared toward continuous monitoring. They also can incorporate other monitoring tools such as blood pressure.

You must keep in mind that the higher priced oximeters do not necessarily mean better quality. However, what you should be looking for is an oximeter which gives an accurate, saturation readings and pulse rates. You should also ask for u demonstration from the seller of the device to clarify any questions which may arise when you reach home and trying to use the pulse oximeter. If this isn’t available, some online sellers provide sufficient information through tutorials and videos.


pulse oximeter to measure oxygen in the blood

Oxygen molecules and Erythrocytes floating in a vessel in the blood stream with Erythrocytes.

A normal pulse rate really depends on so many factors. Some of the most important factors that play a part in determining a healthy pulse rate are age and weight. For example, if you use a pulse oximeter to measure the pulse rate, you will actually find that it gives you very different rates for different age groups. There are some pediatric pulse oximeter devices that are made specifically for measuring the heartbeat of children. Well, it is a common medical knowledge that children’s hearts beat at a much higher rate and as a result, this will sometimes even seem alarming. However, because of the physiological nature of their age, it is quite normal and as such, there is no need for concern. On the other hand, if you use the pulse rate measuring device on an elder individual, you will actually notice that their reading will be lower than most people. Again, this has to completely do with the age of the individual which has a direct effect on the readings. Another specific medical condition is heart arrhythmia as it can actually give you unstable readings as there is no steady beat, they tend to give unusual readings on even accurate measuring devices like a pulse oximeter.

The heart works properly by pushing oxygen-rich blood throughout the body. As that blood enters the various tissues throughout the body, this causes the palpitation being felt when fingers are placed on the neck or wrist. If you are running and working out, you will notice that the intensity of the palpitations goes higher and this is because your heart is working harder to push more oxygen-rich blood through your body. In the end, there really is no normal pulse rate and it really depends on several factors, one of the main ones being age.

They are great to use and can make you feel more comfortable in the knowledge that your oxygen levels are where they should be. However, sometimes people are unsure of what their reading means, and what to do with the reading that the device gives them. Once you know what your reading means, and if this is a healthy reading for you, you will get the most out of your pulse oximeter.

After you have put your pulse oximeter on, make sure that you give it enough time to properly calculate your results. Some people take their oximeter off too soon, and don’t allow the device to properly measure the oxygen saturation level of the hemoglobin, Leave the device on for at least ten seconds, and even when numbers start to appear on the screen, make sure that you still leave it a few seconds to make sure the device has an accurate reading.

Once you have your reading, you then need to check if this is a healthy reading for you. Generally speaking, a healthy person’s oxygen hemoglobin saturation level is between 94% and 99%.lf your pulse oximeter tells you that your reading is within this range, then this means that you have a healthy blood oxygen level, and no action is required. This is great and your mind is at ease after using the device. Sometimes, however, certain health issues can cause the oxygen saturation to be lower than this. If your oxygen level is lower than 94%, and it is between 90% and 93%, it is not an immediate cause for alarm.

Certain health issues, such as mild hypoxia, or any type of respiratory disease, can cause oxygen levels to be lower. However, unless you have a previously diagnosed condition, which your doctor has informed you about, and that your doctor has told you can affect your oxygen levels, you must visit your doctor if your oxygen level is in this category. Your doctor can then run the appropriate tests to see if you have a health problem that is causing the lower oxygen saturation level. But if your reading is less than 88%, you need to see a doctor as soon as you can, as you will need supplementary oxygen.

Keep in mind that certain factors can affect the reading of a pulse oximeter, so always ensure that you use it in the right conditions.


pulse oximeter

Pulse oximeter

A blood oxygen monitor is a device that works in conjunction with a finger oxygen monitor to record the oxygen saturation level in a patient’s blood. This little device is commonly placed on a patient’s finger to record readings at various health issues. The finger monitor passes light through the patient’s fingertip. The light has the capability to read the oxygen saturation levels of the patient and that information is sent to the blood oxygen monitor where medical staff can keep an eye on the levels to ensure the patient is getting the necessary oxygen saturation. The monitor also has an alarm, which is programmed by medical staff to alert them if the oxygen saturation levels fall below the required level.
Technology has come a long way in the past few decades. Today, it’s easy for a patient to carry a portable blood oxygen monitor with them enabling testing at any time or patients with specific conditions can monitor their own oxygen saturation levels. Without a medical background, these devices can seem intimidating and complex. However, if it is necessary for you to carry a portable blood oxygen monitor, your medical team will ensure you receive the necessary training to properly read the device as well as how to properly record the information and what to do if your oxygen levels drop.

You should always follow the manufacturer’s directions and the instructions of your medical team. Remember to always use your index finger to get accurate readings, and make sure the device fits snuggly covering the entire nail. Too tight or too loose and your readings will be inaccurate. Leave the portable finger oxygen monitor on your index finger for 60 to 90 seconds to get an accurate reading, unless your physician instructs you differently.

Some other conditions that can interfere with your readings include cold. It’s a good idea to have your doctor answer all your questions prior to beginning to take your own readings with your blood oxygen monitor. These readings are very important to your health, otherwise, your doctor would not have you taking them, so make sure you are getting the most accurate readings possible. Understanding your blood oxygen monitor is the best.