Incidencia del síndrome de baja triiodotironina en pacientes con shock séptico / Incidence of low-triiodothyronine syndrome in patients with septic shock

RESUMEN Objetivo: Se ha visto asociación entre los bajos niveles de hormonas tiroideas y malos resultados clínicos. Esta situación metabólica designada bajo el término de enfermedad eutiroidea, ha sido interpretada como un estado de adaptación a diferentes procesos patológicos, caracterizada por la disminución plasmática de triiodotironina T3. El presente estudio busca determinar la incidencia de este trastorno en los pacientes con shock séptico y su relación con otros índices de gravedad, y resultados clínicos. Métodos: Estudio de corte prospectivo analítico, evaluó a los pacientes que ingresaron con shock séptico a la unidad de terapia intensiva, durante el periodo abril 2018 - julio 2019. Se registraron variables asociadas al shock séptico, y el perfil tiroideo al momento del diagnóstico de shock séptico, a los 7, 14 y 21 días. Resultados: Se analizaron 27 pacientes que cumplieron con los criterios de inclusión. La incidencia de alteración del eje tiroideo fue del 96,3%s, con una mortalidad a los 28 días de 36,7%. Los pacientes sin alteración hormonal no presentaron desenlaces negativos. Entre los que presentaron baja triiodotironina, 42,3% recupero la función tiroidea dentro de los 28 días, con mortalidad del 0%. No recuperaron función tiroidea (57,7%), con una mortalidad del 66,7%. Comparativamente se observó que aquellos que presentaron alteración del eje y no normalizaron la función, requirieron más dosis de vasoactivos, y deterioro del clearence de lactato. Conclusión: Los pacientes con shock séptico presentan una alta incidencia de alteración del eje tiroideo y esta disfunción se asoció a mayor mortalidad.

ABSTRACT Objective: Low levels of thyroid hormones have been associated with poor clinical outcomes. This metabolic situation, designated euthyroid sick syndrome, has been interpreted as a state of adaptation to different pathological processes, characterized by the decrease in plasma triiodothyronine. The present study seeks to determine the incidence of this disorder in patients with septic shock and its relationship with other severity indices and clinical outcomes. Methods: This prospective analytical study evaluated patients admitted to the intensive care unit with septic shock between April 2018 and July 2019. Variables associated with septic shock and thyroid profile were recorded at the time of the septic shock diagnosis and 7, 14, and 21 days later. Results: A total of 27 patients who met the inclusion criteria were analyzed. The incidence of an altered thyroid axis was 96.3%, with a mortality at 28 days of 36.7%. Patients without hormonal alteration did not present negative outcomes. Among those with low triiodothyronine, 42.3% recovered their thyroid function within 28 days, in whom mortality was 0%; 57.7% did not recover their thyroid function, in whom mortality was 66.7%. Those whose thyroid axis was altered and who did not normalize its function required more doses of vasoactives and had deteriorated lactate clearance. Conclusion: Patients with septic shock have a high incidence of alteration of the thyroid axis, and this dysfunction is associated with higher mortality.

Disfunción tiroidea en adultos infectados por el virus de inmunodeficiencia humana

Los pacientes con infección por el virus de inmunodeficiencia humana (HIV) tienen una mayor prevalencia de disfunción tiroidea cuando se los compara con la población general. Las manifestaciones más frecuentemente observadas son: el síndrome del eutiroideo enfermo, la enfermedad de Graves y el hipotiroidismo subclínico. La relación entre el uso de la terapia antirretroviral y el incremento en la prevalencia de alteraciones tiroideas fue demostrada en varias series de pacientes. La enfermedad de Graves se reconoce claramente como una consecuencia del síndrome de restitución inmune. Además, existen estudios que sugieren una relación entre hipotiroidismo y el uso de inhibidores nucleósidos de la transcriptasa reversa, en particular estavudina y el inhibidor no nucleósido de la transcriptasa reversa efavirenz. Nuevos estudios podrán aportar evidencia adicional sobre la necesidad de evaluaciones rutinarias de la función tiroidea en pacientes infectados por HIV.

Patients infected with human immunodeficiency virus (HIV) have a higher prevalence of thyroid dysfunction when compared with the general population. The most frequently observed manifestations are euthyroid sick syndrome, Graves´ disease and subclinical hypothyroidism. The relationship between the use of highly active antiretroviral therapy and the increased prevalence of thyroid dysfunction has been demonstrated in several series of patients. Grave’s disease is recognized as a consequence of immune restitution syndrome. Besides, several studies have suggested an association between hypothyroidism and the use of nucleoside reverse transcriptase inhibitors, particularly stavudine and non-nucleoside reverse transcriptase inhibitors such as efavirenz. Further studies could provide additional evidence of the need for routine assessment of thyroid function in HIV-infected patients.

Alta prevalencia de disfunción tiroidea en pacientes psiquiátricos hospitalizados / High prevalence of thyroid dysfunction among psychiatric inpatients

Background: Thyroid dysfunction is frecuent in psychiatric outpatients and in the general Chilean population but there is no information about the prevalence of thyroid diseases in Chilean psychiatric inpatients. Aim: To retrospectively assess the frequency of thyroidal diseases in psychiatric inpatients. Material and Methods: Clinical charts and thyroid assessment of 241 psychiatric inpatients (147 women, mean age 33±16 years) attended in a University Psychiatric Clinic, were reviewed. Psychiatric diagnosis at discharge was made according to DSM IV criteria and endocrine diagnosis was made based on international criteria. Results: Forty nine patients (20.7%) had thyroid abnormalities. Forty four patients had hypothyroidism (18.3%) and five had hyperthyroidism (2.35%). No specific associations were found between gender or psychiatric diagnosis and endocrine abnormalities. Conclusions: In this sample, the prevalence of thyroid abnormalities was similar to other reports in psychiatric inpatiens and higher than in the general population in Chile.