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Etymology: Gk, hypo, under, L, calx, calcium, haima, blood, tetanos, convulsive tension
a disease caused by an abnormally low level of calcium in the blood. It is characterized by hyperexcitability of the neuromuscular system and results in carpopedal spasms. A common cause is a deficiency of parathyroid hormone secretion.
Tetany due to low serum calcium and high serum phosphate levels. This may be due to lack of vitamin D, factors that interfere with calcium absorption such as steatorrhea or infantile diarrhea, or defective renal excretion of phosphorus.
See also: tetany
emanating from hypocalcemia; state of decreased blood calcium level.
continuous tonic spasm of a muscle; steady contraction of a muscle without distinct twitching. It is manifested clinically by rigidity of limbs, pricking of ears, flaring of nostrils. In extreme tetany as in tetanus, the rigidity is lead-pipe in nature in that the resistance to bending is constant. In less severe tetany, e.g. an upper motor neuron lesion, there is resistance at first but as soon as this is overcome the limb flexes easily.
see lactation tetany (2).
tetany produced by forced inspiration and expiration continued for a considerable time.
see puerperal tetany (below).
see lactation tetany.
tetany elicited by the application of electrical and mechanical stimulation.
a product of experimental nutrition but see also lactation tetany.
see calf hypomagnesemic tetany.
parathyroid tetany, parathyroprival tetany
tetany due to removal or hypofunctioning of the parathyroid glands.
lush grass or cereal crop pastures, in the early spring when they have grown rapidly and their magnesium content is low. The weather is also inclined to be inclement with a high wind-chill factor and there is little or no shelter for the recently calved cows.
a syndrome of hypocalcemia in bitches, usually of small breeds, typically 2 to 3 weeks after whelping, caused by the loss of extracellular calcium in lactation. Affected bitchs show restlessness, panting and severe muscular spasms, all of which are relieved by the administration of intravenous calcium. Also occurs infrequently in queens. Called also lactational or puerperal tetany.
see Scottie cramp.