The pathognomonic feature of acute hypocalcaemia is tetany (typified by a Trousseau's sign) and is usually preceded by paraesthesia (peri-oral and acral), increased neuromuscular irritability (Chvostek
's sign) and muscle cramps.
's sign is prompted by tapping the facial nerve below the zygoma (about 1-2 inches anterior to the ear).
Hasta un 25% de los pacientes sanos presenta el signo de Chvostek
(espasmo muscular al estimular el tronco del facial) y un 29% de pacientes con hipocalcemia tienen este signo negativo, haciendolo poco sensible y especifico para el diagnostico de hipocalcemia.
sign was observed but not Trousseau sign.
On examination, both Chvostek
's and Trousseau's signs were present.
Physical examination was negative for Chvostek
and Trousseau's sign.
Urbano, "Sign of hypocalcemia: Chvostek
's and Trousseau's signs," Review of Clinical Signs: Hospital Physician, vol.
Symptoms occur due to neuromuscular irritability induced by hypomagnesemia and include muscular weakness, tremors, seizures, paresthesia, positive Chvostek
and/or Trousseau signs, tetany, and a characteristic down-beating nystagmus [13, 18].
He had no tetany, normal deep tendon reflexes, a negative Chvostek
sign, and no electrocardiogram (EKG) changes.
(i) Clinical signs are usually totally absent (chronic latent intracellular deficit) (ii) Neuromuscular: weakness; tremor; muscle fasciculation; dysphagia; positive Chvostek
's sign (facial twitching as a reaction to facial nerve tapping); positive Trousseau's sign (application of a pressure cuff to transiently occlude the brachial artery resulting in spasm of muscles of the hand and forearm) (iii) Cardiac: arrhythmias and ECG changes (iv) Central nervous system: depression, agitation, psychosis, nystagmus, and seizures Table 5: Etiology of magnesium deficiency .
's sign, Trousseau's sign, and signs of neuromuscular irritability were negative.
(13) Trismus with carpopedal spasm with positive Chvostek
's & Trosseau's signs was described in a case reported by Bhargava et al.