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.
Healthy total cholesterol levels â the sum of your HDL and LDL â should stay below 200 mg/dL. To break down that number, your acceptable level of LDL (âbadâ) cholesterol should be less than 160 mg/dl, 130 mg/dL, or 100 mg/dl. The difference in numbers really depends on your individual risk factors for heart disease. Your HDL (âgoodâ) cholesterol should be at least 35 mg/dL, and preferably higher.