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.
1 LDL normal levels of cholesterol, or bad cholesterol, should be under 130. 2  If it's between 160 and 189, it's high, and if it's 190 or more, it's very high. 3  You must focus on lowering LDL/Bad cholesterol.here are 4 measures you need to take and find out your normal levels of cholesterol. These measures are: LDL, HDL, total cholesterol and cholesterol ratios. Before finding out your cholesterol levels, you need to have a blood test.