The best position for a pulse oximeter is generally on the fingertip of either the index or middle finger. However, optimal placement depends on the patient's age and the specific circumstances.
Optimal Placement for Adults
For adults, placing the pulse oximeter on the index or middle finger is recommended. It should fit snugly but comfortably. Find a comfortable position and rest for at least five minutes before taking a reading. Ensure the area is clean and free of nail polish for accurate readings. It is always best to remove nail varnish from one finger. Keep still for at least a minute for a reliable reading.
Optimal Placement for Infants
For infants, the best locations are the palm and foot. The best sites for performing pulse ox on infants are around the palm and the foot. An infant pulse ox probe (not an adult clip) must be used.
Other Potential Placement Areas (Adults)
While fingers are preferred, in certain situations, other areas may be used:
- Earlobes
- Toes
- Nose
- Forehead (Requires specialized sensors)
Instead, special reusable and disposable oximeter sensors can be placed on adults' earlobes, fingers, toes, noses, or foreheads. Note that the accuracy may vary depending on the location.
Body Position and Accuracy
While finger placement is crucial, body position can also impact readings. Try to use the oximeter in an upright sitting position if possible. This will ensure that your heart rate and blood oxygen ratings are accurate. Studies show variations in oxygen saturation levels across different body positions, though readings generally remain within the normal range. Although oxygen saturation values were within the normal range in the five different body positions, post hoc analysis showed that the best oxygenation was in…
