A surgical procedure designed to flatten the cornea and thereby correct nearsightedness (myopia). It is called a radial keratotomy because the radial incisions in the cornea resemble the spokes in a bicycle wheel.
A disorder that is due to severe jaundice in the newborn, with deposition of the pigment bilirubin in the brain that causes damage to the brain, potentially leading to athetoid cerebral palsy, hearing loss, vision problems, or mental retardation. Also known as bilirubin encephalopathy.
- Kernig sign
A sign indicating the presence of meningitis (inflammation of the meninges covering the brain and spinal cord). The test for Kernig sign is done by having the person lie flat on the back, flex the thigh so that it is at a right angle to the trunk, and completely extend the leg at the knee […]
- Keshan disease
A condition caused by deficiency of the essential mineral selenium. Keshan disease is a potentially fatal form of cardiomyopathy (disease of the heart muscle). It was first observed in Keshan province in China, and it has since been found in other areas where the selenium level in the soil is low. Treatment involves selenium supplementation.
A feature of uncontrolled diabetes mellitus characterized by a combination of ketosis and acidosis. Ketosis is the accumulation of substances called keytones and ketone bodies in the blood. Acidosis is increased acidity of the blood. Symptoms of ketoacidosis include slow, deep breathing with a fruity odor to the breath; confusion; frequent urination (polyuria); poor appetite; […]
- Ketogenic diet
A diet devised as a treatment for severe seizure disorders that do not respond to conventional medication. The ketogenic diet is comprised almost entirely of fats and protein. All portion must be precisely weighed and timed. Because this diet can cause the buildup of ketone bodies in the blood, it is highly risky and should […]