cyanosis of the hand of a patient with low oxygen saturations

blue carboxyhaemoglobin carboxyhemoglobin cardiac care chronic circulation color congenital copd cyanosis cyanotic desaturation diagnosis discoloration disease drumstick emphysema finger frost frostbite hand hbco2 healthy heart hospital human hypoxemia hypoxia illness lung nail oxygen pallor patient pediatric peripheral physical pulmonary purple saturations skin symptom ventricular white