All medications and dosages taken in the 30 days before test day, How you felt at the time of the tests and, Content of meals and drinks in the 24-hour period before the test. Most Blood is drawn for Blood testing in the office of your physician, however, this is not always the case.
What is cyanosis? Cyanosis is a bluish color in the skin, lips and nail beds caused by a shortage of oxygen in the blood. Cyanosis occurs because blood with decreased oxygen turns blue or purple. This low-oxygen blood causes a blue-purple tint to the skin. What conditions cause cyanosis? Cyanosis is usually caused by problems of the heart, lungs or blood. Some of the defects or diseases that can cause a child to have cyanosis are: 1  truncus arteriosus. 2  total anomalous pulmonary venous return. 3  transposition of the great arteries. 4  tricuspid atresia. 5  pulmonary atresia. 6  atrioventricular canal defect. 7  pulmonary hypertension. 8  hypoplastic left heart syndrome.
If just the fingers, toes or limbs have turned blue and feel cold, it's known as peripheral cyanosis. Cyanosis that affects the skin generally and/or lips. When all the skin and/or lips have a blue tinge, it's known as central cyanosis and is usually a sign of low levels of oxygen in the blood. Common causes for central cyanosis are listed below. A problem with the lungs: