Signe de Chvostek

Cet article est une ébauche concernant la médecine.

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Schéma représentant les points de Chvostek

Le signe de Chvostek appelé également signe du facial, a longtemps été considéré comme propre à la spasmophilie, mais également significatif d’une carence en calcium, d'une carence en magnésium[1] ou de tétanie. Il se traduit par une contraction de la joue et de la partie médiane de la lèvre supérieure, en réponse à la percussion par le marteau à réflexes du médecin. La zone à percuter se situe sur le milieu de la ligne située entre le lobule de l’oreille et la commissure labiale (coin de la bouche).

Historique

Il a été décrit en 1876 par František Chvostek (de) , médecin tchéco-autrichien, puis indépendamment par Nathan Weiss en 1883.

Deux épreuves de sensibilisation peuvent mettre en évidence le signe de Chvostek dans les cas douteux : l'épreuve d'hyperventilation et le signe de Trousseau.

Références

  1. ↑ James J DiNicolantonio, James H O’Keefe et William Wilson, « Subclinical magnesium deficiency: a principal driver of cardiovascular disease and a public health crisis », Open Heart, vol. 5, no 1,‎ (ISSN 2053-3624, PMID 29387426, PMCID 5786912, DOI 10.1136/openhrt-2017-000668, lire en ligne, consulté le )

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