Dr. John R Greenland M.D., PH.D.

IntroductionCyanosis is the medical term for a bluish discoloration of the skin, nails, toes, and mucous membranes. It is generally caused by low levels of oxygen in the blood. Normally, blood appears bright red when it is fully oxygenated. However, when blood does not have enough oxygen, it turns...

Many patients would generally perform to have their treatments done at home than in a hospital; it's a familiar place, the patient can be more comfortable, travel isn’t necessary. It was assumed, however, that intravenous antibiotic treatment for cystic fibrosis patients would not be as safe at...

CF is an inherited disease that progresses throughout a patient’s life. Progression can occur when the thick and sticky mucus that accumulates within the body triggers inflammation and scarring in multiple different organs, thus leading to permanent damage. Unfortunately, many CF symptoms and...

In many respects, Josh Llewellyn-Jones is a normal 30-year-old guy. As with many men his age, he’s into physical stamina and setting personal records. Referred to as a “fitness fanatic”, Josh has recently completed a successful 24-hour fitness challenge. The only competitor was Josh. And, he...

What is pleurisy?The pleural membrane is a very thin membrane that surrounds your lungs. It has two layers:...

Cystic FibrosisCystic fibrosis is a disorder that is inherited and known to damage the lungs, the digestive system, and other vital organs of the body. Cystic fibrosis causes an impact on the cells that produce mucus, digestive juices, and sweat. These secreted fluids are usually thin and slippery,...