Malignant hyperthermia (MH) is a rare neuromuscular hereditary disorder, triggered in susceptible individuals by exposure to inhalational agents or succinylcholine and manifested as a hypermetabolic state. We report the case of a 22 years old male patient anesthetized with Desflurane in whom MH was suspected because of unexplained increased levels of End-Tidal carbon dioxide. Dantrolene was administered with good response. Respiratory acidosis and hyperkalemia were also detected but could be easily controlled. The postoperative period was uneventful with the exception of a superficial venous thrombosis at the dantrolene's injection site. The patient was discharged eight days after the episode without sequela. Successful management of a malignant hyperthemia episode must include: early suspicion, asking for help and early treatment with dantrolene. ResumenLa Hipertermia Maligna es un trastorno neuromuscular hereditario infrecuente, manifestado por un estado hipermetabólico desencadenado en individuos susceptibles por la exposición a anestésicos halogenados o Succinilcolina. Se reporta el caso de un hombre de 22 años anestesiado con Desflurano, en quien el diagnóstico de Hipertermia Maligna se sospechó por la presencia de elevación inexplicada del CO 2 espirado, que respondió a la suspensión del Desflurano y administración de Dantroleno. Se observó además hiperkalemia y acidosis respiratoria, que fueron fácilmente compensadas. La evolución postoperatoria fue satisfactoria, a excepción de una trombosis venosa superficial en el sitio de inyección del Dantroleno. El paciente fue dado de alta al 8 avo día postoperatorio, sin secuelas. Las claves del manejo exitoso de un episodio de hipertermia maligna están en: Sospecha precoz, solicitar ayuda e inició rápido del tratamiento con Dantroleno.
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