A pulse oximeter is a small electronic medical device that measures a patient’s blood oxygenation, or how much oxygen their blood carries.
It is normally attached to the index finger with a plastic clip, but may also used on the foot and other body parts. It makes its measurements
with the help of light-emitting diodes (LEDs). Medical professionals use the information from the pulse oximeter to monitor how well oxygen
is being delivered throughout the patient’s body.
A finger oximeter is a portable pulse oximetry device that measures oxygen saturation (sat) and pulse. Instead of producing a reading on a
separately connected piece of equipment, the reading is produced directly on the small clip that sits on the finger. This is the smallest of the
pulse oximetry pieces of equipment, and many devices come with a lanyard cord that can be worn around the neck or wrist so that the
oximeter is easy to carry.
First developed in 1935, the oximeter has been improved upon ever since. In 1974, the digital pulse oximeter was invented by two bioengineers,
and was first sold and distributed in 1981. Theoretically, all pulse oximeter models are finger oximeters. The part of the device that reads
oxygen saturation by passing infrared and other forms of light through a digit to get a sat reading typically sits on a finger, or occasionally
on a toe.
The majority of pulse oximeters are attached to a finger, which is typically the index finger. To obtain an accurate reading, it is important to
be aware of certain conditions that may exist which distort readings. To obtain an accurate reading, the finger to which the pulse oximeter
is attached should be free from nail polish. Black nail polish, for example, can prevent accurate readings. If the subject has cold hands and
fingers, this too can prevent an accurate reading. Providing that neither of the aforementioned conditions exist, to obtain an accurate
measurement the pulse oximeter must be securely clipped onto the finger.
We offer both detailed descriptions of the leading oximeters and also user ratings so that you can make an informed purchasing decision
when you are ready to buy the most suitable piece of equipment for your specific needs. The devices that you will find featured on our
website are ideal for health, sports and fitness applications. When available, we have also provided detailed product datasheets which offer
in-depth information to the accuracy and capabilities of each particular finger pulse oximeter.