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.
A desirable total cholesterol level for adults without heart disease is less than 200 mg/dL. An HDL cholesterol level of 60 mg/dL and above is considered protective against heart disease, while a level less than 50 mg/dL for women or 40 mg/dL for men is considered a major risk factor for heart disease.lood cholesterol is measured in milligrams per deciliter (mg/dL). A deciliter is one-tenth of a liter). NCEP defines a desirable total cholesterol level as less than 200 mg/dL, and levels for most women stay in the healthy or desirable range until middle-age.