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Pulmonary surfactant is a mixture of lipids and proteins that is produced by alveolar type II epithelial cells (AEC2) and secreted into the airspaces. Phospholipids are the major component of surfactant by weight, and are essential for lowering surface tension at the air-liquid interface, which prevents alveolar collapse at end-expiration. Four proteins highly expressed in the lung and found in surfactant are designated surfactant proteins (SP) A, B, C, and D. Additional proteins including ABCA3 and NKX2.1 are also important for the production of functional surfactant. The surfactant proteins are developmentally regulated, such that their expression increases in later gestation
Alcoholic hepatitis can occur in people who drink heavily for many years. Symptoms include yellow skin and eyes along with increasing belly size due to fluid accumulation. Treatment involves hydration, nutritional care, and stopping alcohol use. Steroid drugs can help reduce liver inflammation.
Robotic-assisted endoscopic thyroid surgery using the daVinci® Surgical System can safely and effectively offer those needing thyroid surgery relief without neck incisions. Dr. Ron Kuppersmith and Dr. Andrew deJong are now performing this procedure at the College Station Medical Center in Texas.
This video demonstrates why ears become clogged and why ear popping helps. The video also explains why ear popping may become difficult resulting in a persistent clogged or muffled ear especially after an ear infection.
Nasal polyps are associated with inflammation of the lining of your nasal passages and sinuses that lasts more than 12 weeks (chronic rhinosinusitis, also known as chronic sinusitis). However, it's possible — and even somewhat more likely — to have chronic sinusitis without nasal polyps. Nasal polyps themselves are soft and lack sensation, so if they're small you may not be aware you have them. Multiple growths or a large polyp may block your nasal passages and sinuses.
Pneumonia is an infection that inflames the air sacs in one or both lungs. The air sacs may fill with fluid or pus (purulent material), causing cough with phlegm or pus, fever, chills, and difficulty breathing. A variety of organisms, including bacteria, viruses and fungi, can cause pneumonia.
A breech birth occurs when a baby is born bottom first instead of head first. Around 3-5% of pregnant women at term (37–40 weeks pregnant) will have a breech baby. Most babies in the breech position are born by a caesarean section because it is seen as safer than being born vaginally.