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Arq. gastroenterol ; 52(2): 124-128, Apr-Jun/2015. tab, graf
Article in English | LILACS | ID: lil-748170

ABSTRACT

Background Thyroid dysfunction has been reported in most chronic illnesses including severe liver disease. These defects in thyroid hormone metabolism result in the sick euthyroid syndrome, also known as low T3 syndrome. Objectives Our objective was to evaluate the thyroid function in patients with end stage liver disease prior and after deceased donor liver transplantation and to correlate thyroid hormonal changes with the MELD score (Model for End stage Liver Disease). Methods In a prospective study, serum levels of thyrotropin (thyroid stimulating hormone TSH), total thyroxine (tT4), free thyroxine (fT4) and triiodothyronine (T3) from 30 male adult patients with end stage liver disease were measured two to four hours before and 6 months after liver transplantation (LT). MELD was determined on the day of transplant. For this analysis, extra points were not added for patients with hepatocellular carcinoma. Results The patients had normal TSH and fT4 levels before LT and there was no change after the procedure. Total thyroxine and triiodothyronine were within the normal range before LT, except for four patients (13.3%) whose values were lower. Both hormones increased to normal values in all four patients after LT (P=0.02 and P<0.001, respectively). When the patients were divided into two groups (MELD <18 and MELD >18), it was observed that there was no change in the TSH, freeT4, and total T4 levels in both groups after LT. Although there was no significant variation in the level of T3 in MELD <18 group (P=0.055), there was an increase in the MELD >18 group after LT (P=0.003). Conclusion Patients with end stage liver disease subjected to liver transplantation had normal TSH and fT4 levels before and after LT. In a few patients with lower tT4 and T3 levels before LT, the level of these hormones increased to normal after LT. .


Contexto A disfunção tireoidiana tem sido relatada em associação com a maioria das doenças crônicas, incluindo a doença hepática terminal. Estes defeitos no metabolismo dos hormônios tireoidianos resultam na síndrome do doente eutireoideo ou, também conhecida como síndrome do T3 baixo. Objetivos Avaliar a função tireoidiana em pacientes com doença hepática avançada, antes e depois de serem submetidos ao transplante hepático cadavérico (THC) e, correlacionar as alterações hormonais da tireóide com o MELD. Métodos Em um estudo prospectivo, os níveis séricos de tireotropina (hormônio estimulante da tireóide TSH), tiroxina total (T4 total), tiroxina livre (T4 livre) e triiodotironina (T3) de 30 pacientes adultos do sexo masculino com doença hepática terminal foram dosados 2 e 4 horas antes e 6 meses após o THC. O valor do MELD foi determinado no dia do procedimento. Para esta análise, os pontos extras não foram adicionados para os pacientes com carcinoma hepatocelular. Resultados Os pacientes apresentaram níveis de TSH e T4 livre normais antes do THC e não houve nenhuma alteração após o procedimento. As dosagens de T4 total e T3 no início do estudo estavam dentro da faixa normal, exceto por quatro pacientes (13,3%), os quais apresentavam valores abaixo da referência. Ambos os hormônios apresentaram um aumento 6 meses após o THC (P=0,02 e P<0,001, respectivamente). Quando os pacientes foram divididos em dois grupos (MELD <18 e MELD >18) não observamos diferença nos níveis de TSH, T4 total e T4 livre entre os grupos após THC. Apesar de não haver variação nos níveis de T3 no grupo com MELD <18 (P=0,055), houve um aumento no grupo MELD >18 após THC (P=0,003). Conclusão Os pacientes com cirrose hepática submetidos a transplante hepático tinham valores normais de TSH e T4 livre antes e após o THC. Nos poucos pacientes que apresentavam valores baixos de T4 total e T3 antes do THC, houve normalização destes hormônios após o THC. .


Subject(s)
Adult , Female , Humans , Male , Middle Aged , End Stage Liver Disease/blood , Liver Transplantation , Thyroid Hormones/blood , Biomarkers/blood , End Stage Liver Disease/physiopathology , End Stage Liver Disease/surgery , Prospective Studies , Severity of Illness Index , Thyroid Gland/physiopathology , Thyrotropin/blood , Thyroxine/blood , Triiodothyronine/blood
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