Precaution of Using your Finger Pulse Oximeter

Correct Way of Using your Finger Pulse Oximeter

Despite the advantages of high precision and ease of use there are some factors that crop up for everyone. This leads us to believe that we have a faulty device and we agonize over simple things. There are some factors that if taken care of will drive out some unnecessary problems:

  • Major body motion

Body motion may result in some error as it cause noise that affects the values calculated. When any noise, including that caused by body motion, reduces the reliability of the values calculated, the pulse oximeter will not display correct readings.

  • Abnormal hemoglobin

Some abnormal hemoglobin such as carboxyhemoglobin and methemoglobin are present in the blood which do not contribute to oxygen delivery. The dual-wavelength pulse oximeter, (which is more accurate than the single wavelength) may be affected by these abnormal hemoglobin.

  • Manicure and pedicure

If users wear nail polish, it may absorb the light emitted from the LED. This changes the amount of light that actually gets transmitted through the fingertips, influencing the values of the Oximeter reading.

  • Blood flow blocked due to pressure on arms or fingers

If the blood flow is blocked, correct measurement becomes impossible. This is because the pulse oximeter measures oxygen saturation based on changes in the blood flow. Therefore, In addition, if the fingers are flexed at a uniform pace (if, for example, grip strength is intensified at a uniform pace), the pulse oximeter may interpret the pressure as changes in pulse rate, causing errors (particularly pulse rate errors).

  • Medical dyes

If dyes such as cardio green, intravascular dyes, and indocyanine green have been injected into the blood, they may influence the level of transmission of the red and infrared light.

  • Excessive ambient light (panel lamp, fluorescent lamp, infrared heating lamp, direct sunlight, etc.)

The Finger Pulse Oximeter uses two wavelengths of light to take measure. The pulse oximeter can usually cancel out the effects of ambient light. However, if the ambient light is too strong, the device will not be able to cancel out the effects, and this may cause errors.

  • Ambient electromagnetic waves

Devices that produce high level of electromagnetic waves such as televisions, mobile telephones, or medical devices if used near a pulse oximeter may lead to inaccurate results. This is because the waves produces by other electro-magnetic devices interfere with the waves of the oximeter.

  • Probe attached incorrectly

Although most of the modern finger pulse oximeter come with a self adjusting mechanism. If the probe is not properly attached, it may detect a variety of noise, resulting in inaccurate measurement.

Taking care of these steps would relieve you of the much hassle that people go through. You can purchase a pulse Oximeter at

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