Pneumothorax - In a pneumothorax, air collects in the pleural cavity. It may be caused by trauma to the chest, chest surgery, and COPD among other causes. When a pneumothorax is small, it may simply be observed to see if the air is reabsorbed.
This ratio is determined by dividing the HDL cholesterol into the total cholesterol. If a person has a total cholesterol of 200 mg/dL and an HDL cholesterol of 40 mg/dL, his or her total/HDL cholesterol ratio would be 5:1. The goal is to keep this ratio below 5:1, with the ideal being below 3.5:1.his ratio is determined by dividing the HDL cholesterol into the total cholesterol. If a person has a total cholesterol of 200 mg/dL and an HDL cholesterol of 40 mg/dL, his or her total/HDL cholesterol ratio would be 5:1. The goal is to keep this ratio below 5:1, with the ideal being below 3.5:1.
'Total cholesterol' is a measure of LDL cholesterol, HDL cholesterol and other cholesterol components. If you donât already have cardiovascular disease the aim is to lower your total cholesterol level to less than 5.0mmol/l and LDL cholesterol to under 3mmol/l. If you already have cardiovascular disease, your aim is to get your total cholesterol down to less than 4.0mmol/l and LDL cholesterol to under 2.0mmol/l.