Guide
Guide
Modern health monitoring includes numerous measured values that provide important information about our body. Three values in particular are essential when monitoring health: oxygen saturation (SpO₂), pulse rate and perfusion index. But what exactly do these values mean and why are they so important?
Oxygen saturation (SpO₂) indicates how much oxygen is in the red blood cells. A normal SpO₂ value is between 95% and 100%. The pulse rate also describes how often the heart beats per minute (beats per minute, BPM for short). A normal heart rate at rest is between 60 and 100 beats per minute. Another important value when measuring vital signs is the perfusion index (PI), which indicates the relative strength of the blood flow.
This article explains the exact meaning of these vital signs and why they should be checked regularly.
As mentioned at the beginning, oxygen saturation (SpO2) is a measure of the proportion of oxygen-loaded haemoglobin in the blood. A normal value is between 95 % and 100 %. Values below this range can indicate an insufficient oxygen supply, which can lead to serious physical damage.
Regular monitoring of oxygen saturation can be particularly important for patients with respiratory or cardiovascular diseases.
This value is one of the most important vital parameters for a person's health and provides information on the strain on the heart as well as the general physical condition.
The pulse rate describes how often the heart beats per minute. A normal heart rate at rest is between 60 and 100 beats per minute. Deviations, whether the pulse rate is too high or too low, can indicate health problems.
The perfusion index (PI) is a measure of the amount of blood flow in the peripheral tissues, usually measured by a pulse oximeter. The PI is a relative number and varies depending on the user and physiological conditions, which is why each person's normal PI is different. PI values can range from 0.02 % to 20 %, the greater the value, the greater the perfusion.
A low PI may indicate poor peripheral circulation, which could be due to arterial disease or diabetes, for example. It can be particularly helpful for people with circulatory problems to monitor the perfusion index regularly.
If the oxygen saturation falls below the ideal value of 95% to 100%, this is known as hypoxemia. Oxygen levels between 90% and 94% indicate mild hypoxemia, which can be characterized by slight shortness of breath, tiredness and difficulty concentrating. Moderate hypoxemia is defined as measured values between 80 % and 89 %. This can lead to more severe symptoms such as dizziness, confusion, headaches and an increased heart rate. In contrast, severe hypoxemia with measured values below 80% oxygen saturation are medical emergencies that can lead to unconsciousness, chest pain, severe shortness of breath and an increased risk of organ damage.
A SpO₂ value that is too low can be the first sign of a serious illness, such as pneumonia or chronic obstructive pulmonary disease (COPD). If you regularly measure your blood oxygen level, you can react to changes at an early stage and avoid health complications.
It is important to note that the heart rate depends on various factors - for example, age, gender or individual fitness level. The heart rate of a healthy adult at rest should be between 60 and 80 beats per minute. For groups of people such as senior citizens, pregnant women, babies, children and adolescents, the number of beats may be somewhat higher. A pulse rate that is too high or too low can indicate stress, overwork or even heart disease. An increased heart rate can indicate heart disease such as heart failure or heart valve disease. A low heart rate may be due to an abnormal sinus node.
People with pre-existing conditions should regularly monitor their heart rate to ensure that their heart is working optimally.
In principle, regular exercise such as walking is a good basic building block for maintaining oxygen saturation in the arterial blood and maintaining a normal heart rate. Blood circulation can be impaired by diabetes or high blood pressure. However, aspects such as age, diet and lifestyle (smoking) also play a role.
A healthy perfusion index is crucial for proper oxygen supply to the organs. Restricted blood flow can indicate vascular problems that can lead to serious illnesses such as a stroke or heart attack. Regular monitoring of this value is therefore recommended.
With our new PF-10A fingertip pulse oximeter, you can now monitor your health even more precisely and easily. The device not only allows you to measure the SpO₂ value, but also offers the option of regularly measuring the pulse rate and perfusion index. With its user-friendly design and state-of-the-art sensor technology, the PF-10A provides reliable health monitoring values - ideal for home use and for medical professionals.
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