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Cintilografia pulmonar - Conhecer Saúde
Home | Exames | C: | Cintilografia pulmonar

Cintilografia pulmonar

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image

A cintilografia pulmonar de ventilação/perfusão, é um exame realizado aos pulmões, com o objetivo de detetar possível obstrução, que impeça a passagem de ar ou do fluxo sanguíneo nestes provocando uma tromboembolia pulmonar.

Há dois tipos de cintilografia de acordo com a técnica usada, a de ventilação e a de perfusão. Ambas necessitam de administração de um radiofarmaco e são feitas numa sala de gama câmara.

A realização do teste não implica qualquer preparação, é um exame realizado com alguma urgência devido à necessidade de diagnóstico e tratamento. Todo o processo demora cerca de 45 minutos.


Realização do exame

O exame é realizado em duas partes seguidas, uma com inalação de aerossóis (cintilografia de ventilação) e outra com perfusão de marcadores (cintilografia de perfusão). A primeira serve para ver se o pulmão ventila, ou seja, se faz as trocas gasosas, e a outra mostra se há fluxo sanguíneo em todo o pulmão.

Na cintilografia de ventilação, a pessoa inala (respira) através de inalador próprio, marcadores radioativos gasosos, aerossóis ou micropartículas marcadas com tecnécio. O exame mostra se há zonas do pulmão que não estão a ventilar, onde não há entrada e saída de ar.

Na cintilografia de perfusão, é injetado aglomerados de albumina marcados com tecnécio-99 m no sangue. As possíveis zonas do pulmão, onde não chega o sangue, ficam mais claras (zona fria).


O resultado deste exame é feito através da comparação das zonas frias, que são as pouco reativas, da ventilação e da perfusão. Se a cintilografia de ventilação for normal e a de perfusão não, é sinal de tromboembolismo pulmonar.

 

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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