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.
One stalk of celery contains about 10 calories. Celery is a low-calorie vegetable that supplies a healthy dose of certain nutrients. It is common to eat celery sticks with a side of ranch dressing for dipping. Ranch dressing is high in fat and sodium, but eating it with celery won't negate the health benefits of the vegetable because you're still consuming the nutrients.