The black fruit makes them look like Blackberries, though this is only superficial, with the taste being unique and not like either red raspberry or blackberry. In much of the Mid-Atlantic United States, black raspberries are simply called Blackberries, even though they are not. Hybrids between red and black raspberries are common under the name purple raspberries; âBrandywineâ, âRoyaltyâ and âEstateâ are examples of purple raspberry cultivars.
In the finger is an artery which carries the blood the pulse oximeter is interested in and a vein through which the blood leaves the finger. Below the finger is the light detector. Physical property No.1 : Amount of light absorbed is proportional to the concentration of the light absorbing substance
Pulse oximeters measure how much of the hemoglobin in blood is carrying oxygen (oxygen saturation). If you work in healthcare (or have been patient !) you are very likely to have come across pulse oximeters. You can find them in areas such as operating rooms, recovery, critical care, wards, and ambulances.he pleth is an extremely important graph to see. It tells you how good the pulsatile signal is. If the quality of the pulsatile signal is poor, then the calculation of the oxygen saturation may be wrong. The pulse oximeter uses very complicated calculations to work out oxygen saturation.