Pulmonary function tests are used when: 1  Screening for the presence of obstructive and/or restrictive lung diseases. 2  Determining the patient's condition prior to surgery in order to assess the risk of respiratory complications after surgery.  Evaluating the ability of a patient to be weaned off a ventilator.
Health benefits. One stalk of celery contains only about 10 calories, while a cup of chopped celery contains about 16. It also contains dietary fiber (1.6 grams per cup), which helps curb cravings because it absorbs water in the digestive tract, making you feel fuller longer.
Calories and Fat. A 100-gram serving of celery leaves, about 3.5 ounces, introduces 34.8 calories into your meal plan. If you follow a 2,000 calorie diet, the quantity in these leaves equates to 1.7 percent of your total allow able calories in a 24-hour period.You also take in 0.3 grams of fat.alories and Fat. A 100-gram serving of celery leaves, about 3.5 ounces, introduces 34.8 calories into your meal plan. If you follow a 2,000 calorie diet, the quantity in these leaves equates to 1.7 percent of your total allow able calories in a 24-hour period. You also take in 0.3 grams of fat.