A rheostat is a device which is used to vary the resistance in an electrical circuit without interrupting the circuit.heostats are a kind of potentiometer. These devices can be used in a variety of settings, and are usually designed to be sealed so that environmental factors cannot interfere with the function of the circuit.
What are the types of allergic rhinitis? The two categories of allergic rhinitis include: Seasonal - occurs particularly during pollen seasons. Seasonal allergic rhinitis does not usually develop until after 6 years of age. Perennial - occurs throughout the year. This type of allergic rhinitis is commonly seen in younger children. What are the causes of allergic rhinitis? The most common causes of allergic rhinitis include the following: Pollen ; Dust mites ; Mold ; Animal dander ; What are the symptoms of allergic rhinitis? The following are the most common symptoms of allergic rhinitis. However, each child may experience symptoms differently. Symptoms may include: Sneezing ; Congestion ; Runny nose ; Itchy nose, throat, eyes, and ears ; Nosebleeds ; Clear drainage from the nose ; Children with perennial allergic rhinitis may also have the following:
Signs and symptoms of RSV include: Cough; Fever; Irritability; Runny nose; Sneezing; Sluggish or being inactive; Trouble breathing; Wheezing; Symptoms of RSV usually last about one to two weeks. If you think your baby may have RSV, contact her health care provider. When should you call your baby's health care provider right away? Call your baby's health care provider right away if your baby has: