{"id":17473,"date":"2026-04-09T11:30:31","date_gmt":"2026-04-09T11:30:31","guid":{"rendered":"https:\/\/atlasemhematologia.com.br\/blog\/?p=17473"},"modified":"2026-04-06T11:32:04","modified_gmt":"2026-04-06T11:32:04","slug":"o-hemograma-na-purpura-trombocitopenica-imunologica-pti-abordagem-laboratorial","status":"publish","type":"post","link":"https:\/\/atlasemhematologia.com.br\/blog\/o-hemograma-na-purpura-trombocitopenica-imunologica-pti-abordagem-laboratorial\/","title":{"rendered":"O hemograma na p\u00farpura trombocitop\u00eanica imunol\u00f3gica (PTI): abordagem laboratorial"},"content":{"rendered":"\n<p>A p\u00farpura trombocitop\u00eanica imunol\u00f3gica (PTI) consiste em uma doen\u00e7a hematol\u00f3gica de natureza autoimune, caracterizada pela destrui\u00e7\u00e3o perif\u00e9rica de plaquetas mediada por autoanticorpos e outros mecanismos imunes. Como consequ\u00eancia, observa-se redu\u00e7\u00e3o significativa da contagem plaquet\u00e1ria, o que aumenta o risco de manifesta\u00e7\u00f5es hemorr\u00e1gicas.<\/p>\n\n\n\n<p>Nesse contexto, o hemograma destaca-se como exame inicial fundamental na investiga\u00e7\u00e3o laboratorial. Al\u00e9m disso, sua interpreta\u00e7\u00e3o adequada permite n\u00e3o apenas a identifica\u00e7\u00e3o da trombocitopenia, mas tamb\u00e9m a exclus\u00e3o de outras condi\u00e7\u00f5es hematol\u00f3gicas relevantes. Portanto, compreender o papel do hemograma na PTI \u00e9 essencial para a pr\u00e1tica laboratorial.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"600\" height=\"361\" src=\"https:\/\/atlasemhematologia.com.br\/blog\/wp-content\/uploads\/2026\/04\/image-4.png\" alt=\"\" class=\"wp-image-17474\" srcset=\"https:\/\/atlasemhematologia.com.br\/blog\/wp-content\/uploads\/2026\/04\/image-4.png 600w, https:\/\/atlasemhematologia.com.br\/blog\/wp-content\/uploads\/2026\/04\/image-4-300x181.png 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Altera\u00e7\u00f5es caracter\u00edsticas no hemograma<\/strong><\/h2>\n\n\n\n<p>O principal achado no hemograma de pacientes com PTI \u00e9 a trombocitopenia isolada. Ou seja, h\u00e1 redu\u00e7\u00e3o significativa no n\u00famero de plaquetas, enquanto os demais par\u00e2metros hematol\u00f3gicos permanecem, em geral, dentro da normalidade.<\/p>\n\n\n\n<p>Al\u00e9m disso, \u00edndices plaquet\u00e1rios podem apresentar altera\u00e7\u00f5es relevantes. Frequentemente, observa-se aumento do volume plaquet\u00e1rio m\u00e9dio (VPM) e da amplitude de distribui\u00e7\u00e3o plaquet\u00e1ria (PDW), o que reflete uma resposta compensat\u00f3ria da medula \u00f3ssea frente \u00e0 destrui\u00e7\u00e3o perif\u00e9rica.<\/p>\n\n\n\n<p>No esfrega\u00e7o de sangue perif\u00e9rico, por sua vez, \u00e9 comum a presen\u00e7a de macroplaquetas. Esse achado refor\u00e7a a hip\u00f3tese de produ\u00e7\u00e3o medular aumentada, sendo um dado importante na an\u00e1lise morfol\u00f3gica laboratorial.<\/p>\n\n\n\n<p>Entretanto, em casos de sangramento significativo, pode ocorrer anemia secund\u00e1ria, o que deve ser cuidadosamente avaliado na interpreta\u00e7\u00e3o global do hemograma.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Import\u00e2ncia do hemograma no diagn\u00f3stico diferencial<\/strong><\/h2>\n\n\n\n<p>Embora o hemograma seja essencial, \u00e9 importante destacar que a PTI n\u00e3o possui um teste diagn\u00f3stico espec\u00edfico. Dessa forma, o diagn\u00f3stico \u00e9, sobretudo, de exclus\u00e3o.<\/p>\n\n\n\n<p>Nesse sentido, o hemograma exerce papel central ao auxiliar na diferencia\u00e7\u00e3o entre PTI e outras causas de trombocitopenia, como leucemias, infec\u00e7\u00f5es, doen\u00e7as autoimunes e dist\u00farbios medulares.<\/p>\n\n\n\n<p>A aus\u00eancia de altera\u00e7\u00f5es em leuc\u00f3citos e hemoglobina, associada \u00e0 trombocitopenia isolada, favorece o diagn\u00f3stico de PTI. Por outro lado, altera\u00e7\u00f5es adicionais no hemograma podem indicar outras patologias, exigindo investiga\u00e7\u00e3o complementar.<\/p>\n\n\n\n<p>Assim, a an\u00e1lise criteriosa dos par\u00e2metros hematol\u00f3gicos permite direcionar a conduta diagn\u00f3stica de forma mais assertiva no laborat\u00f3rio.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/eventos.atlasemhematologia.com.br\/listadeesperatimeblogatlas\"><img decoding=\"async\" width=\"1030\" height=\"276\" src=\"https:\/\/atlasemhematologia.com.br\/blog\/wp-content\/uploads\/2026\/03\/BANNER-BLOG-ATLAS-1030x276.png\" alt=\"\" class=\"wp-image-17314\" srcset=\"https:\/\/atlasemhematologia.com.br\/blog\/wp-content\/uploads\/2026\/03\/BANNER-BLOG-ATLAS-1030x276.png 1030w, https:\/\/atlasemhematologia.com.br\/blog\/wp-content\/uploads\/2026\/03\/BANNER-BLOG-ATLAS-300x80.png 300w, https:\/\/atlasemhematologia.com.br\/blog\/wp-content\/uploads\/2026\/03\/BANNER-BLOG-ATLAS-768x206.png 768w, https:\/\/atlasemhematologia.com.br\/blog\/wp-content\/uploads\/2026\/03\/BANNER-BLOG-ATLAS-1536x411.png 1536w, https:\/\/atlasemhematologia.com.br\/blog\/wp-content\/uploads\/2026\/03\/BANNER-BLOG-ATLAS-2048x549.png 2048w\" sizes=\"(max-width: 1030px) 100vw, 1030px\" \/><\/a><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Aplica\u00e7\u00e3o do hemograma no monitoramento laboratorial<\/strong><\/h2>\n\n\n\n<p>Al\u00e9m do diagn\u00f3stico, o hemograma possui papel fundamental no acompanhamento dos pacientes com PTI. A contagem plaquet\u00e1ria \u00e9 utilizada como principal par\u00e2metro para avaliar a evolu\u00e7\u00e3o cl\u00ednica e a resposta ao tratamento.<\/p>\n\n\n\n<p>A frequ\u00eancia de realiza\u00e7\u00e3o do exame varia conforme a gravidade da trombocitopenia. Em situa\u00e7\u00f5es cr\u00edticas, com plaquetas muito reduzidas, o monitoramento deve ser frequente. \u00c0 medida que ocorre estabiliza\u00e7\u00e3o dos n\u00edveis plaquet\u00e1rios, os intervalos entre os exames podem ser ampliados.<\/p>\n\n\n\n<p>Dessa forma, o hemograma torna-se uma ferramenta indispens\u00e1vel na pr\u00e1tica laboratorial, permitindo acompanhamento din\u00e2mico e seguro do paciente.<\/p>\n\n\n\n<p><strong>Refer\u00eancias:<\/strong><\/p>\n\n\n\n<p>ALVES, Ana Klara Rodrigues et al. P\u00farpura trombocitop\u00eanica idiop\u00e1tica: uma doen\u00e7a subdiagnosticada. <strong>Revista Sustinere<\/strong>, v. 9, n. 1, p. 50-64, 2021.<\/p>\n\n\n\n<p>DAS DORES QUEIROZ, M\u00e1rilsi et al. P\u00farpura trombocitop\u00eanica idiop\u00e1tica em crian\u00e7as: uma revis\u00e3o narrativa. <strong>Research, Society and Development<\/strong>, v. 11, n. 2, p. e35711225734-e35711225734, 2022.<\/p>\n\n\n\n<p>PADOVANI, T\u00e2nia Regina et al. P\u00farpura trombocitop\u00eanica idiop\u00e1tica na gravidez. <strong>Revista da faculdade de ci\u00eancias m\u00e9dicas de Sorocaba<\/strong>, v. 14, n. 1, p. 22-23, 2012.<\/p>\n\n\n\n<p>DA CONCEI\u00c7\u00c3O, Maria F\u00e1tima. P\u00daRPURA TROMBOCITOP\u00caNICA IDIOP\u00c1TICA.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>A p\u00farpura trombocitop\u00eanica imunol\u00f3gica (PTI) consiste em uma doen\u00e7a hematol\u00f3gica de natureza autoimune, caracterizada pela destrui\u00e7\u00e3o perif\u00e9rica de plaquetas mediada por autoanticorpos e outros mecanismos imunes. Como consequ\u00eancia, observa-se redu\u00e7\u00e3o significativa da contagem plaquet\u00e1ria, o que aumenta o risco de manifesta\u00e7\u00f5es hemorr\u00e1gicas. Nesse contexto, o hemograma destaca-se como exame inicial fundamental na investiga\u00e7\u00e3o laboratorial. Al\u00e9m [&hellip;]<\/p>\n","protected":false},"author":6,"featured_media":17475,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"pagelayer_contact_templates":[],"_pagelayer_content":"","footnotes":""},"categories":[12],"tags":[],"class_list":["post-17473","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-hemostasia"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>O hemograma na p\u00farpura trombocitop\u00eanica imunol\u00f3gica (PTI): abordagem laboratorial - Blog - Atlas em Hematologia<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/atlasemhematologia.com.br\/blog\/o-hemograma-na-purpura-trombocitopenica-imunologica-pti-abordagem-laboratorial\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"O hemograma na p\u00farpura trombocitop\u00eanica imunol\u00f3gica (PTI): abordagem laboratorial - Blog - Atlas em Hematologia\" \/>\n<meta property=\"og:description\" content=\"A p\u00farpura trombocitop\u00eanica imunol\u00f3gica (PTI) consiste em uma doen\u00e7a hematol\u00f3gica de natureza autoimune, caracterizada pela destrui\u00e7\u00e3o perif\u00e9rica de plaquetas mediada por autoanticorpos e outros mecanismos imunes. 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