{"id":2000,"date":"2026-08-12T14:30:56","date_gmt":"2026-08-12T17:30:56","guid":{"rendered":"https:\/\/lam.unitedforclinicalnutrition.com\/pt-br\/?p=2000"},"modified":"2026-08-12T15:50:00","modified_gmt":"2026-08-12T18:50:00","slug":"hipofosfatemia-sindrome-realiamentacao","status":"publish","type":"post","link":"https:\/\/lam.unitedforclinicalnutrition.com\/pt-br\/hipofosfatemia-sindrome-realiamentacao\/","title":{"rendered":"Hipofosfatemia e a s\u00edndrome da realimenta\u00e7\u00e3o: o que voc\u00ea sabe sobre essa rela\u00e7\u00e3o?"},"content":{"rendered":"<p>Quando se trata de reintrodu\u00e7\u00e3o alimentar em pacientes desnutridos, a nutri\u00e7\u00e3o pode, paradoxalmente, ser perigosa. A s\u00edndrome da realimenta\u00e7\u00e3o (SR) \u00e9 um exemplo emblem\u00e1tico: silenciosa, potencialmente fatal e frequentemente subestimada.<\/p>\n<p>Sua rela\u00e7\u00e3o com a hipofosfatemia \u00e9 t\u00e3o estreita que este dist\u00farbio eletrol\u00edtico se tornou um de seus principais marcadores. A seguir, entenda a conex\u00e3o intr\u00ednseca entre s\u00edndrome de realimenta\u00e7\u00e3o e hipofosfatemia.<\/p>\n<h2>O que \u00e9 a s\u00edndrome de realimenta\u00e7\u00e3o?<\/h2>\n<p>A s\u00edndrome de realimenta\u00e7\u00e3o \u00e9 um conjunto de <strong>sinais e sintomas potencialmente fatais causados \u200b\u200bpor dist\u00farbios metab\u00f3licos e eletrol\u00edticos<\/strong>, como hipofosfatemia (1).<\/p>\n<p>Esses dist\u00farbios surgem com a<strong> reintrodu\u00e7\u00e3o de nutri\u00e7\u00e3o em indiv\u00edduos que passaram por um per\u00edodo significativo de desnutri\u00e7\u00e3o<\/strong> (1).<\/p>\n<p>A verdadeira incid\u00eancia de SR \u00e9 desconhecida, devido \u00e0 falta de consenso em rela\u00e7\u00e3o \u00e0 sua defini\u00e7\u00e3o. Entretanto, as incid\u00eancias relatadas variam de 0,43% a 18% em pacientes hospitalizados (2). Em estudo com pacientes sob nutri\u00e7\u00e3o parenteral, 23 a 48% desenvolveram SR, a depender dos crit\u00e9rios diagn\u00f3sticos utilizados (3).<\/p>\n<p>Os sintomas geralmente se manifestam entre <strong>2 a 5 dias ap\u00f3s o in\u00edcio da realimenta\u00e7\u00e3o<\/strong> e variam de ausentes a graves, com risco de morte, a depender do grau de desnutri\u00e7\u00e3o e das comorbidades. Todos os \u00f3rg\u00e3os podem ser afetados, com manifesta\u00e7\u00f5es card\u00edacas, respirat\u00f3rias, hematol\u00f3gicas, gastrointestinais, neurol\u00f3gicas e musculoesquel\u00e9ticas, podendo evoluir para \u00f3bito (4).<\/p>\n<h2>Quando h\u00e1 risco de s\u00edndrome de realimenta\u00e7\u00e3o?<\/h2>\n<p>Segundo consenso da Sociedade Australiana de Nutri\u00e7\u00e3o Parenteral e Enteral (2025), considera-se risco de SR quando o paciente apresenta pelo menos dois dos seguintes fatores (1):<\/p>\n<ul>\n<li>Perda de peso n\u00e3o intencional superior a 10% do peso corporal nos \u00faltimos 3 meses OU diagn\u00f3stico de desnutri\u00e7\u00e3o moderada a grave com base na Avalia\u00e7\u00e3o Global Subjetiva ou na Avalia\u00e7\u00e3o Global Subjetiva Gerada pelo Paciente<\/li>\n<li>Jejum ou ingest\u00e3o nutricional limitada por \u22657 dias<\/li>\n<li>Consumo problem\u00e1tico de \u00e1lcool<\/li>\n<li>Perdas gastrointestinais<\/li>\n<\/ul>\n<h2>Hipofosfatemia e s\u00edndrome de realimenta\u00e7\u00e3o: mecanismos fisiopatol\u00f3gicos<\/h2>\n<p>A fisiopatologia da SR est\u00e1 ligada \u00e0 mudan\u00e7a das vias metab\u00f3licas catab\u00f3licas para anab\u00f3licas ap\u00f3s o rein\u00edcio da alimenta\u00e7\u00e3o em indiv\u00edduos subnutridos (4).<\/p>\n<p>Durante o jejum prolongado, minerais intracelulares como f\u00f3sforo, pot\u00e1ssio e magn\u00e9sio tornam-se severamente depletados (4).<\/p>\n<p>Com a reintrodu\u00e7\u00e3o nutricional, eleva-se a insulina e reduz-se a secre\u00e7\u00e3o do glucagon. Por conta disso, <strong>a s\u00edntese de glicog\u00eanio, gordura e prote\u00ednas volta a ser estimulada. Isso exige uma grande quantidade de nutrientes como o f\u00f3sforo<\/strong>, o magn\u00e9sio e a tiamina (5).<\/p>\n<p>O pico de insulina estimula o consumo intracelular de f\u00f3sforo, pot\u00e1ssio e magn\u00e9sio e toda essa cascata de processos <strong>reduz a concentra\u00e7\u00e3o dos minerais no sangue<\/strong>, caracterizando, quando falamos do f\u00f3sforo, a hipofosfatemia (n\u00edveis abaixo de 0,65 mmol\/L) (6, 7).<\/p>\n<p>Como o f\u00f3sforo \u00e9 essencial para a produ\u00e7\u00e3o de energia, sua queda compromete a gera\u00e7\u00e3o de ATP e 2,3-difosfoglicerato, afetando o funcionamento card\u00edaco, respirat\u00f3rio e a libera\u00e7\u00e3o de oxig\u00eanio para os tecidos (4).<\/p>\n<h2>Quais as manifesta\u00e7\u00f5es cl\u00ednicas da hipofosfatemia?<\/h2>\n<ul>\n<li>Comprometimento card\u00edaco e respirat\u00f3rio (taquicardia, taquipneia);<\/li>\n<li>Sintomas neurol\u00f3gicos (confus\u00e3o, letargia, coma, parestesia, convuls\u00f5es);<\/li>\n<li>Dist\u00farbios hematol\u00f3gicos (hem\u00f3lise, trombocitopenia, disfun\u00e7\u00e3o leucocit\u00e1ria);<\/li>\n<li>Hip\u00f3xia por libera\u00e7\u00e3o prejudicada de oxig\u00eanio;<\/li>\n<li>Fraqueza muscular, rabdomi\u00f3lise, mialgia (4).<\/li>\n<\/ul>\n<h2>Como diagnosticar a s\u00edndrome de realimenta\u00e7\u00e3o?<\/h2>\n<p>Os crit\u00e9rios diagn\u00f3sticos variam na literatura (1). Segundo as diretrizes da ASPEN (2020), a defini\u00e7\u00e3o cl\u00ednica envolve a queda de <strong>10\u201320%, 20\u201330% ou mais de 30% nos n\u00edveis s\u00e9ricos de f\u00f3sforo, pot\u00e1ssio e\/ou magn\u00e9sio<\/strong>, conforme a gravidade; e\/ou <strong>disfun\u00e7\u00e3o org\u00e2nica decorrente dessas altera\u00e7\u00f5es<\/strong>, ocorrendo dentro de 5 dias ap\u00f3s o in\u00edcio da realimenta\u00e7\u00e3o (8).<\/p>\n<p>A hipofosfatemia \u00e9 considerada um marcador-chave. Contudo, seu uso isolado pode levar \u00e0 superestima\u00e7\u00e3o do diagn\u00f3stico (1, 2).<\/p>\n<p>Mais recentemente, especialistas sugeriram que o diagn\u00f3stico exija (1):<\/p>\n<ul>\n<li>Ingest\u00e3o nutricional adequada (\u226550% das necessidades estimadas)<\/li>\n<li>Desequil\u00edbrios eletrol\u00edticos ap\u00f3s o in\u00edcio da ingest\u00e3o nutricional<\/li>\n<li>Sintomas cl\u00ednicos ap\u00f3s o in\u00edcio da ingest\u00e3o nutricional<\/li>\n<\/ul>\n<h2>Preven\u00e7\u00e3o e manejo da s\u00edndrome de realimenta\u00e7\u00e3o<\/h2>\n<p><strong>Tiamina<\/strong>: suplementar antes do in\u00edcio da ingest\u00e3o nutricional e durante os primeiros 7 a 10 dias para mitigar o risco de SR (1).<\/p>\n<p><strong>Multivitam\u00ednicos<\/strong>: suplementar 10 dias a partir do in\u00edcio do suporte nutricional (1).<\/p>\n<p><strong>Aporte energ\u00e9tico<\/strong>: para pacientes com risco de SR, iniciar a alimenta\u00e7\u00e3o com \u2265 50% das necessidades energ\u00e9ticas estimadas. Os pacientes devem atingir as necessidades energ\u00e9ticas desejadas dentro de 24 a 72 horas ap\u00f3s o in\u00edcio do suporte nutricional, desde que haja monitoramento (1).<\/p>\n<p><strong>Em casos de dist\u00farbio eletrol\u00edtico grave<\/strong> (redu\u00e7\u00e3o &gt; 30% em rela\u00e7\u00e3o ao valor basal e fora da faixa normal): aguardar a estabiliza\u00e7\u00e3o dos n\u00edveis antes de prosseguir em dire\u00e7\u00e3o ao fornecimento nutricional desejado (1).<\/p>\n<p><strong>Doses profil\u00e1ticas de eletrol\u00edticos<\/strong>: n\u00e3o h\u00e1 recomenda\u00e7\u00f5es se os n\u00edveis de eletr\u00f3litos pr\u00e9-alimenta\u00e7\u00e3o estiverem normais, mas deve ser considerada a crit\u00e9rio da equipe m\u00e9dica respons\u00e1vel (1).<\/p>\n<p><strong>Monitoramento<\/strong>: O dist\u00farbio eletrol\u00edtico associado \u00e0 s\u00edndrome de realimenta\u00e7\u00e3o tem maior probabilidade de ocorrer dentro de 72 horas ap\u00f3s o aumento do fornecimento de nutri\u00e7\u00e3o. Recomenda-se que os eletr\u00f3litos s\u00e9ricos sejam monitorados e repostos at\u00e9 que a equipe m\u00e9dica respons\u00e1vel considere est\u00e1vel (1).<\/p>\n<p>Em resumo, a s\u00edndrome de realimenta\u00e7\u00e3o representa um risco real e preven\u00edvel, especialmente em pacientes desnutridos. A hipofosfatemia, como sinal de alerta, refor\u00e7a a import\u00e2ncia de estrat\u00e9gias de preven\u00e7\u00e3o e monitoramento criterioso para garantir uma transi\u00e7\u00e3o alimentar segura e eficaz.<\/p>\n<h2>Refer\u00eancias<\/h2>\n<ol>\n<li>Matthews-Rensch K, Blackwood K, Lawlis D, Breik L, McLean C, Nguyen T, Phillips S, Small K, Stewart T, Thatcher A, Venkat L, Brodie E, Cleeve B, Diamond L, Ng MY, Small A, Viner Smith E, Asrani V. The Australasian Society of Parenteral and Enteral Nutrition: Consensus statements on refeeding syndrome. Nutr Diet. 2025 Apr;82(2):128-142.<\/li>\n<li>StatPearls [Internet]. Refeeding Syndrome. Treasure Island (FL): StatPearls Publishing; 2023.<\/li>\n<li>Wong GJY, Pang JGT, Li YY, Lew CCH. Refeeding Hypophosphatemia in Patients Receiving Parenteral Nutrition: Prevalence, Risk Factors, and Predicting Its Occurrence. Nutr Clin Pract. 2021 Jun;36(3):679-688.<\/li>\n<li>Ponzo V, Pellegrini M, Cioffi I, Scaglione L, Bo S. The Refeeding Syndrome: a neglected but potentially serious condition for inpatients. A narrative review. Intern Emerg Med. 2021 Jan;16(1):49-60.<\/li>\n<li>Veldscholte K, Veen MAN, Eveleens RD, de Jonge RCJ, Vanhorebeek I, Gunst J, et al. Early hypophosphatemia in critically ill children and the effect of parenteral nutrition: A secondary analysis of the PEPaNIC RCT. Clin Nutr. 2022;41(11):2500-2508.<\/li>\n<li>Fuentebella J, Kerner JA. Refeeding syndrome. Pediatr Clin. 2009;56(5):1201e10.<\/li>\n<li>van Zanten AR. Changing paradigms in metabolic support and nutrition therapy during critical illness. Curr Opin Crit Care. 2018;24(4):223-227.<\/li>\n<li>da Silva JSV, Seres DS, Sabino K, Adams SC, Berdahl GJ, Citty SW, et al. ASPEN Consensus Recommendations for Refeeding Syndrome. Nutr Clin Pract. 2020 Apr;35(2):178\u2013195.<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"<p>Quando se trata de reintrodu\u00e7\u00e3o alimentar em pacientes desnutridos, a nutri\u00e7\u00e3o pode, paradoxalmente, ser perigosa. A s\u00edndrome da realimenta\u00e7\u00e3o (SR) \u00e9 um exemplo emblem\u00e1tico: silenciosa, potencialmente fatal e frequentemente subestimada. Sua rela\u00e7\u00e3o com a hipofosfatemia \u00e9 t\u00e3o estreita que este dist\u00farbio eletrol\u00edtico se tornou um de seus principais marcadores. A seguir, entenda a conex\u00e3o intr\u00ednseca [&hellip;]<\/p>\n","protected":false},"author":5902,"featured_media":2144,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":"","_members_access_role":[],"_members_access_error":""},"categories":[47],"tags":[183,70,348,220,219,346,67,350,349,347,243,143],"class_list":["post-2000","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-artigo-4","tag-aspen","tag-desnutricao","tag-disturbios-eletroliticos","tag-fosforo","tag-hipofosfatemia","tag-indrome-de-realimentacao","tag-nutricao-parenteral","tag-paciente","tag-realimentacao","tag-reposicao-nutricional","tag-suporte-nutricional","tag-terapia-nutricional"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>S\u00edndrome de Realimenta\u00e7\u00e3o e Hipofosfatemia: 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