{"id":1757,"date":"2025-10-15T11:00:14","date_gmt":"2025-10-15T14:00:14","guid":{"rendered":"https:\/\/lam.unitedforclinicalnutrition.com\/pt-br\/?p=1757"},"modified":"2025-10-15T10:46:16","modified_gmt":"2025-10-15T13:46:16","slug":"relevancia-da-alta-proteina-no-paciente-critico","status":"publish","type":"post","link":"https:\/\/lam.unitedforclinicalnutrition.com\/pt-br\/relevancia-da-alta-proteina-no-paciente-critico\/","title":{"rendered":"Entenda a Relev\u00e2ncia da Prote\u00edna no Paciente Cr\u00edtico"},"content":{"rendered":"<p>Prote\u00ednas s\u00e3o macronutrientes essenciais para a sobreviv\u00eancia e manuten\u00e7\u00e3o da sa\u00fade, principalmente para o paciente cr\u00edtico. A seguir, entenda a import\u00e2ncia da oferta de doses adequadas de prote\u00ednas para esse tipo de paciente.<\/p>\n<h2>Quais s\u00e3o as condi\u00e7\u00f5es cl\u00ednicas do paciente cr\u00edtico?<\/h2>\n<p>O paciente cr\u00edtico \u00e9 aquele com instabilidade ou risco de instabilidade de sistemas vitais, (cardiovasculares, respirat\u00f3rios, neurol\u00f3gicos, renais ou metab\u00f3licos), necessitando de suporte em UTIs ou unidades de cuidado intermedi\u00e1rio (UCI) (1).<\/p>\n<p>Esses pacientes enfrentam <strong>estresse catab\u00f3lico, aumento do gasto energ\u00e9tico e perda de massa muscular,<\/strong> impactando desfechos cl\u00ednicos (2, 3, 4).<\/p>\n<p>O estado catab\u00f3lico \u00e9 agravado pela <strong>resposta inflamat\u00f3ria sist\u00eamica<\/strong>, que aumenta o risco de morbidade infecciosa, disfun\u00e7\u00f5es org\u00e2nicas m\u00faltiplas, e altera o balan\u00e7o metab\u00f3lico.<\/p>\n<p>A inflama\u00e7\u00e3o desencadeia a intensifica\u00e7\u00e3o da prote\u00f3lise, resultando na destrui\u00e7\u00e3o de prote\u00ednas musculares (como actina e miosina), exacerbando ainda mais a perda de massa muscular e de peso (5). Assim, muitos pacientes cr\u00edticos apresentam <strong>desnutri\u00e7\u00e3o<\/strong> e <strong>fraqueza muscular adquirida na UTI<\/strong> (6, 7).<\/p>\n<p>Inicialmente, com a administra\u00e7\u00e3o de prote\u00edna, o corpo resiste \u00e0 s\u00edntese proteica devido ao catabolismo elevado, o que agrava a condi\u00e7\u00e3o cl\u00ednica dos pacientes. Ap\u00f3s 10 a 30 dias, pode ocorrer um aumento na s\u00edntese proteica (5).<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-2120\" src=\"https:\/\/lam.unitedforclinicalnutrition.com\/pt-br\/wp-content\/uploads\/sites\/3\/2022\/04\/lam206-imagem-1.png\" alt=\"\" width=\"482\" height=\"330\" srcset=\"https:\/\/lam.unitedforclinicalnutrition.com\/pt-br\/wp-content\/uploads\/sites\/3\/2022\/04\/lam206-imagem-1.png 482w, https:\/\/lam.unitedforclinicalnutrition.com\/pt-br\/wp-content\/uploads\/sites\/3\/2022\/04\/lam206-imagem-1-300x205.png 300w\" sizes=\"auto, (max-width: 482px) 100vw, 482px\" \/><\/p>\n<p>&nbsp;<\/p>\n<h2>Import\u00e2ncia e recomenda\u00e7\u00f5es de prote\u00edna para o paciente cr\u00edtico<\/h2>\n<p>Diante do quadro descrito anteriormente, o apoio nutricional para o paciente cr\u00edtico \u00e9 crucial. A prote\u00edna melhora os desfechos cl\u00ednicos ao atenuar as perdas proteicas durante a doen\u00e7a grave, e auxiliar na recupera\u00e7\u00e3o em fases posteriores (8). O organismo utiliza as prote\u00ednas diet\u00e9ticas para melhorar o balan\u00e7o nitrogenado (que passa de negativo a positivo com o aumento da oferta proteica) (9).<\/p>\n<p>A via de administra\u00e7\u00e3o, sua qualidade e a absor\u00e7\u00e3o interferem na entrega do nutriente \u00e0 musculatura (10). Quando o sistema gastrointestinal n\u00e3o est\u00e1 funcionando, a nutri\u00e7\u00e3o parenteral torna-se uma alternativa necess\u00e1ria. Os hidrolisados \u200b\u200bde amino\u00e1cidos s\u00e3o um componente essencial da NP e apresentam uma composi\u00e7\u00e3o balanceada com amino\u00e1cidos essenciais e n\u00e3o essenciais (5).<\/p>\n<p>As necessidades nutricionais variam de acordo com o estado do paciente, mas a prioridade na terapia nutricional deve ser a ingest\u00e3o proteica (11).<\/p>\n<h5><strong>Qual o melhor tipo de prote\u00edna para o paciente cr\u00edtico?<\/strong><\/h5>\n<p>As fontes de prote\u00edna variam em efici\u00eancia, sendo a <strong>prote\u00edna do soro do leite <\/strong>frequentemente considerada a melhor op\u00e7\u00e3o, por seu alto teor do amino\u00e1cido <strong>leucina<\/strong>, essencial para anabolismo e reparo tecidual (5).<\/p>\n<p>Ademais, ela cont\u00e9m todos os amino\u00e1cidos essenciais em maiores concentra\u00e7\u00f5es do que as fontes vegetais e \u00e9 rica em outros amino\u00e1cidos de cadeia ramificada (BCAAs) (isoleucina, valina), fundamentais para o crescimento muscular (5).<\/p>\n<p>Ela tamb\u00e9m \u00e9 rica em <strong>ciste\u00edna e metionina<\/strong>, amino\u00e1cidos sulfurados que favorecem a fun\u00e7\u00e3o imunol\u00f3gica. Sua digest\u00e3o e absor\u00e7\u00e3o s\u00e3o mais r\u00e1pidas em compara\u00e7\u00e3o com a case\u00edna, que coagula no est\u00f4mago, retardando a absor\u00e7\u00e3o e o aumento de amino\u00e1cidos plasm\u00e1ticos (5).<\/p>\n<p>No contexto da nutri\u00e7\u00e3o parenteral, deve-se atentar para que todos esses amino\u00e1cidos sejam fornecidos de quantidade adequada e equilibrada aos pacientes de UTI.<\/p>\n<h5><strong>Quais as doses recomendadas?<\/strong><\/h5>\n<p>A ingest\u00e3o proteica recomendada para pacientes cr\u00edticos varia conforme a orienta\u00e7\u00e3o de diferentes sociedades. A Sociedade Europeia de Nutri\u00e7\u00e3o Cl\u00ednica e Metabolismo (ESPEN) sugere uma ingest\u00e3o de <strong>1,3 g\/kg\/dia<\/strong> de prote\u00edna ap\u00f3s a primeira semana de doen\u00e7a cr\u00edtica (3).<\/p>\n<p>J\u00e1 a Sociedade Americana de Nutri\u00e7\u00e3o Parenteral e Enteral (ASPEN) estabelece uma faixa mais ampla, de <strong>1,2 a 2,0 g\/kg\/dia<\/strong> (A).<\/p>\n<h5><strong>Aten\u00e7\u00e3o ao excesso de prote\u00ednas<\/strong><\/h5>\n<p>Durante a primeira semana de doen\u00e7a cr\u00edtica, o excesso cal\u00f3rico, incluindo uma ingest\u00e3o proteica muito alta, pode prejudicar respostas adaptativas importantes, como a autofagia (12).<\/p>\n<p>Estudos indicam que ingest\u00f5es proteicas superiores a 1,3 g\/kg\/dia, especialmente se acompanhadas de superalimenta\u00e7\u00e3o, podem ter efeitos negativos. Em uma pesquisa com mais de 20.000 pacientes, a ingest\u00e3o proteica de 0,8\u20131,2 g\/kg\/dia, do 5\u00ba ao 11\u00ba dia de interna\u00e7\u00e3o foi associada a um menor risco de morte hospitalar em compara\u00e7\u00e3o a ingest\u00f5es muito baixas (&lt; 0,8 g\/kg\/d) ou muito altas (&gt; 1,2 g\/kg\/d) (13).<\/p>\n<p>Al\u00e9m disso, um grande estudo multic\u00eantrico sobre prote\u00ednas (EFFORT) n\u00e3o conseguiu confirmar benef\u00edcios com a maior ingest\u00e3o proteica (1,6 g\/kg\/dia). Pelo contr\u00e1rio, pacientes com les\u00e3o renal aguda (LRA) e altos escores de fal\u00eancia de \u00f3rg\u00e3os apresentaram aumento da mortalidade em 60 dias quando receberam uma dose proteica maior (14).<\/p>\n<h2>Conclus\u00e3o<\/h2>\n<p>Em suma, a ingest\u00e3o proteica no paciente cr\u00edtico deve ser cuidadosamente monitorada. Sua ingest\u00e3o desempenha um papel crucial na recupera\u00e7\u00e3o e na melhoria dos desfechos cl\u00ednicos. A chave est\u00e1 em ajustar a quantidade de prote\u00edna, evitando tanto a defici\u00eancia nutricional quanto a sobrecarga, garantindo a melhor recupera\u00e7\u00e3o poss\u00edvel para esses pacientes.<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p><strong>Refer\u00eancias:<\/strong><\/p>\n<p>1 &#8211; Conselho Federal de Medicina. Resolu\u00e7\u00e3o CFM n\u00b0 2.271\/2020. Dispon\u00edvel em: https:\/\/sistemas.cfm.org.br\/normas\/visualizar\/resolucoes\/BR\/2020\/2271. Acesso em: 29 nov. 2021.<\/p>\n<p>2 &#8211; Santos VDD, Ara\u00fajo IS. Impact of protein intake and nutritional status on the clinical outcome of critically ill patients. Rev Bras Ter Intensiva. 2019;31(2):210-216.<\/p>\n<p>3 &#8211; Santana MM, Vieira LL, Dias DA, Braga CC, Costa RM. Inadequa\u00e7\u00e3o cal\u00f3rica e proteica e fatores associados em pacientes graves. Rev Nutr. 2016;29(5):645-654.<\/p>\n<p>4 &#8211; Lee JC, Williams GW, Kozar RA, Kao LS, Mueck KM, Emerald AD, et al. Multitargeted feeding strategies improve nutrition outcome and are associated with reduced pneumonia in a level 1 trauma intensive care unit. JPEN J Parenter Enteral Nutr. 2017 Mar 1:148607117699561. [Epub ahead of print].<\/p>\n<p>5 &#8211; Singer P. Protein metabolism and requirements in the ICU. Clin Nutr ESPEN. 2020;38:3-8. doi: 10.1016\/j.clnesp.2020.03.026.<\/p>\n<p>6 &#8211; Patkova A, Joskova V, Havel E, Kovarik M, Kucharova M, Zadak Z, Hronek M. Energy, protein, carbohydrate, and lipid intakes and their effects on morbidity and mortality in critically ill adult patients: a systematic review. Adv Nutr. 2017;8(4):624-634.<\/p>\n<p>7 &#8211; Hermans G, Van den Berghe G. Clinical review: intensive care unit acquired weakness. Crit Care. 2015;19(1):274. Dispon\u00edvel em: https:\/\/www.ncbi.nlm.nih.gov\/pmc\/articles\/PMC4526175\/. Acesso em: 26 dez. 2021.<\/p>\n<p>8 &#8211; Lee ZY, Dresen E, Lew CCH, Bels J, Hill A, Hasan MS, et al. The effects of higher versus lower protein delivery in critically ill patients: an updated systematic review and meta-analysis of randomized controlled trials with trial sequential analysis. Crit Care. 2024;28(1):15. doi: 10.1186\/s13054-023-04783-1.<\/p>\n<p>9 &#8211; Liebau F, Norberg A, Rooyackers O. Does feeding induce maximal stimulation of protein balance? Curr Opin Clin Nutr Metab Care. 2016;19(2):120-124.<\/p>\n<p>10 &#8211; Churchward-Venne TA, Burd NA, Phillips SM. Nutritional regulation of muscle protein synthesis with resistance exercise: strategies to enhance anabolism. Nutr Metab (Lond). 2012;9(1):40.<\/p>\n<p>11 &#8211; Campos AC, Matsuba CS, Aanholt DP, Nunes DS, Toledo DO, Rocha EE, et al. Diretrizes Brasileira de Terapia Nutricional. BRASPEN J. 2018;33(Supl 1):1-46.<\/p>\n<p>12 &#8211; Castro S, Tom\u00e9 A, Granja C, Macedo A, Binnie A. High vs low protein intake in chronic critical illness: A systematic review and meta-analysis. Clin Nutr ESPEN. 2025;65:249-255. doi: 10.1016\/j.clnesp.2024.12.003.<\/p>\n<p>13 &#8211; Hartl WH, Kopper P, Bender A. Protein intake and outcome of critically ill patients: analysis of a large international database using piece-wise exponential additive mixed models. Crit Care. 2022 Dec 1;26.<\/p>\n<p>14 &#8211; Heyland DK, Patel J, Compher C, et al. The effect of higher protein dosing in critically ill patients with high nutritional risk (EFFORT Protein): an international, multicentre, pragmatic, registry-based randomised trial. Lancet. 2023;401(10376):568. doi: 10.1016\/s0140-6736(22)02469-2.<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Prote\u00ednas s\u00e3o macronutrientes essenciais para a sobreviv\u00eancia e manuten\u00e7\u00e3o da sa\u00fade, principalmente para o paciente cr\u00edtico. A seguir, entenda a import\u00e2ncia da oferta de doses adequadas de prote\u00ednas para esse tipo de paciente. Quais s\u00e3o as condi\u00e7\u00f5es cl\u00ednicas do paciente cr\u00edtico? O paciente cr\u00edtico \u00e9 aquele com instabilidade ou risco de instabilidade de sistemas vitais, [&hellip;]<\/p>\n","protected":false},"author":67,"featured_media":2121,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[47,4],"tags":[183,310,333,119,166,148,306,67,146,90,332,243,143],"class_list":["post-1757","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-artigo-4","category-nutricao-clinica","tag-aspen","tag-balanco-nitrogenado","tag-bcaa","tag-braspen","tag-catabolismo","tag-espen","tag-leucina","tag-nutricao-parenteral","tag-pacientes-criticos","tag-proteina","tag-proteina-em-uti","tag-suporte-nutricional","tag-terapia-nutricional"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Veja a relev\u00e2ncia da prote\u00edna no paciente 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