Fingertip Pulse Oximeter: What They Are & How They Work.

A sensor is positioned on the thin area of the person’s body, normally a finger or ear, or perhaps in the situation of an infant, around a foot. Light of two various wavelengths is passed through the person to a photo detector. The modifying absorbance at intervals of the wavelengths is calculated, allowing resolution of the absorbance’s as a result of pulsing arterial blood by itself, not including venous blood, bone, skin, fat, muscle, and generally nail polish. With this device it’s possible to measure both “oxygenated” and “deoxygenated hemoglobin” on the peripheral scale.

Fingertip Pulse Oximeter: What They Are & How They Work.How to Use a Finger Pulse Oximeter

  • Pick a finger for the test; the index finger is usually used but any finger will be fine. Remove all nail polish or varnish from the fingernail, along with artificial nails.
  • Clip the probe onto the finger, over the nail bed. Connect the probe just like a clothes pin. Make sure there isn’t any pain associated and the probe perfectly fits on the finger. Pick a different finger if the probe isn’t going to properly fit.
  • Turn the device on. Enable the device to regulate and configure. Read through how powerful the pulse signal is, if the device screens signal strength. Adjust fingers in case the current finger is indicating a poor signal-often an indication of a weak pulse, poor circulation or simply just cold hands. Consider the monitor to determine exactly what the percentage of blood is saturated with oxygen. Look at the saturation level with regard to percentage; regular ranges are between 95% and 99 %. Keep in mind levels may vary greatly based on general
  • Clean up the pulse oximetry device using general precautions while using the device for longer than a single patient. Clean it with alcohol or anti-bacterial solution. Make sure to clean the device and probe if utilized for prolonged periods.

When to use a Pulse Oximeter

Finger oximeters could be used to regularly measure the level of oxygen in the patient’s blood in the hospital. hey could be used by patients with respiratory or cardiac problems – such as emphysema or congestive heart failure – as a way to detect whether their ventilation is sufficient to provide body tissues with oxygen. Aviators in unpressurized aircraft could also use pulse oximeters to watch their oxygen levels whenever using supplemental oxygen.

Limitations of Pulse Oximeters

Although this person might have a pulse oximeter reading of 100, he could still not have this much oxygen to live. Such a very high finger oximeter reading could be extracted from an anemic patient. In anemia, the patient has a decreased amount of hemoglobin molecules inside the blood. In such cases, there’s just not enough “hemoglobin” to bind sufficient levels of oxygen to provide body tissues. Also, someone having a high pulse oximeter reading could also have high amounts of carbon-dioxide, which isn’t measured by a pulse oximeter. High amounts of carbon-dioxide inside the blood could be fatal.

This article was provided exclusively to the website you are viewing it from by Greg Young, who writes on a variety of topics related to home medical equipment including Respironics evergo oxygen concentrators and a variety of finger oximeter products.

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