Medical Dictionary Definitions A-Z List
Medical Dictionary Definitions A - Z - «H»:
Hemithorax: Half of the thorax or, more simply, one side of the chest. The plural is hemithoraxes or hemithoraces. A chest with no separation of the hemithoraces is called a buffalo chest....
Hemizygous: Having only a single copy of a gene instead of the customary two copies. All of the gene on the single X chromosome in the male are in the hemizygous state....
Hemochromatosis: Hemochromatosis (iron overload) is an inherited disorder in how the body absorbs and stores iron. The excess iron gives the skin a bronze color and damages the liver and other organs. Diabetes is also a part of the syndrome due to damage to
Hemodialysis: A medical procedure that uses a special
machine (a dialysis machine) to filter waste products from the
blood and to restore normal constituents to it. This shuffling of multiple substances is accomplished by virtue of the differences in the rates of their diffusion through a semiperm...
Hemodialysis catheter: See: Catheter, hemodialysis....
Hemoglobin: The oxygen-carrying pigment and predominant protein in the red blood cells. Hemoglobin forms an unstable, reversible bond with oxygen. In its oxygenated state it is called oxyhemoglobin and is bright red. In the reduced state it is called deoxyhemoglobin and is purple-blue.
Hemoglobin A: Normal adult hemoglobin, the main type of hemoglobin after infancy. The A stands for Adult....
Hemoglobin A1C: The main fraction of glycosylated hemoglobin (glycohemoglobin) which is hemoglobin to which glucose is bound. Hemoglobin A1C is tested to monitor the long-term control of diabetes mellitus.
The level of hemoglobin A1C is increased in the red blood cells of persons with poorly contro...
Hemoglobin E: Normal embryonic hemoglobin, the main type of hemoglobin found in the human embryo. The E stands for embryonic and also for epsilon, the chain unique to embryonic hemoglobin (which was originally known as Gower-2)....
Hemoglobin F: Normal fetal hemoglobin, the predominant type of hemoglobin in the fetus and newborn. The F stands for Fetal. ...
Hemoglobin normal values
Hemoglobin normal values: Hemoglobin is the oxygen-carrying pigment in the blood, the predominant protein in the red blood cells. In the routine laboratory test for hemoglobin (Hb), it is usually measured as total hemoglobin and the result is expressed as the
amount of hemoglobin in grams (gm) per ...
Hemoglobin S: The most common type of abnormal hemoglobin and the basis of sickle
cell trait and sickle cell anemia.
Hemoglobin S differs from normal adult hemoglobin (called hemoglobin A) only by a single amino acid substitution (a valine replacing a glutamine in the 6th position of the beta chai...
Hemoglobin, carbon monoxide
Hemoglobin, carbon monoxide: See: Carboxyhemoglobin....
Hemoglobin, glycosylated: Hemoglobin to which glucose is bound. Glycosylated hemoglobin is tested to monitor the long-term control of diabetes mellitus.
The level of glycosylated hemoglobin is increased in the red blood cells of persons with poorly controlled diabetes mellitus. Since the glucose ...
Hemoglobinuria: The presence of free hemoglobin in the urine, an abnormal finding, that may make the urine look dark.
Hemoglobin is the protein in the red blood cells which carries oxygen from the lungs to the tissues of the body and returns carbon dioxide from the tissues to the lungs. The iron con...