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Teste de tolerância à glicose - Conhecer Saúde
Home | Exames | T: | Teste de tolerância à glicose

Teste de tolerância à glicose

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O teste de tolerância à glicose é um exame feito ao sangue da mulher grávida, antes e após esta ingerir glicose diluída.


Qual o objectivo da realização do exame

Este exame é realizado no final do 1º trimestre, para determinar se houve desenvolvimento de diabetes durante a gravidez (diabetes gestacional), resistência à insulina e avaliar qual a velocidade a que o organismo remove o açúcar do sangue.


Factores de riscos para desenvolver diabetes gestacional

Em mulheres com factores de risco, o médico pode pedir o exame mais cedo.

- Diabetes na família
- Hipertensão arterial
- Edemas (inchaço)
- Obesidade.

Como se realiza o exame

Neste exame é colhido sangue à grávida em jejum e de seguia bebe glicose diluída. A concentração de glicose que a grávida ingere depende do exame prescrito.
O teste O' Sullivan é geralmente o primeiro a ser pedido. É colhido sangue em jejum, é fornecido 50g de glicose diluída para beber e colhido novamente sangue passado duas horas.

Se no teste anterior o valor da glicémia após os 120 minutos for superior a 140, o médico pode pedir o teste PTGO. Aqui a quantidade de glicose fornecida é de 100g. O sangue é colhido em jejum, passado 60, 120 e 180 minutos de beber a glicose.

Geralmente, a diabetes gestacional desaparece após a gravidez.

 

Referencias: Manual de Enfermagem: Exames Laboratoriais e Diagnósticos - Editora - Editora Nova Guanabara

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image , concluiu Curso Superior de Enfermagem em 1996 e a Licenciatura em Enfermagem em 2001. Fez em 2003 o Curso Inicial de Formadores e renovou em 2008. Editora do Conhecer Saúde.


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