This little battery driven device, that clips on your middle finger, will detect low oxygen levels in your blood. It will alert you to the need for medical attention, if the reading falls below 95% saturation level.
The optimum level is 100% oxygen saturation level in the blood. The problem with Covid is that even without breathing difficulties, the readings could fall, with the person being unaware of their potential danger. Full instructions for use come with the Oximeter. It is very important to have warm hands, so that the blood flow is good.
The proffered finger must be clean and free of nail varnish and/or tattoos. Sit still and take your time while going through this procedure to ensure an accurate result. It is nothing like as difficult as trying to take your own blood pressure with a blood pressure monitor at home! In addition to the oxygen blood saturation level, the device will provide a reading of your pulse. 60 -100 beats per minute for a resting pulse is within the medically satisfactory range.
A fall in oxygen levels should be a warning to any medically qualified person, that you consult about an illness. It is tangible evidence of the serious nature of a condition, in addition to subjective information given.