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.
Celery gets a bad rap â for a lot of bad reasons. Maybe youâve read that celery is a ânegative calorieâ food â as in you burn more calories chewing a stalk of celery than you actually get from the celery itself.hat 16 calories might not sound like much â and itâs not â but for almost no caloric intake, you get 1.6 grams of dietary fiber. Not bad considering youâd have to eat 1.5 cups of romaine lettuce, 2 cups of raw spinach or 2 cups of chopped iceberg to get the same amount of fiber.