{
  "schemaVersion": 2,
  "eyebrow": "Pediatric emergency medicine",
  "title": "Pediatric Dehydration Rehydration",
  "summary": "Select oral rehydration for most children with mild-to-moderate dehydration, use nasogastric ORS when drinking fails, and reserve isotonic intravenous fluid for shock, deterioration, altered mental status, ileus, or failed enteral therapy.",
  "seoDescription": "Point-of-care pediatric dehydration strategy: select oral, nasogastric, or IV rehydration; manage shock; replace ongoing losses; and reassess response.",
  "clinicalQuestion": "How should clinicians select and monitor oral, nasogastric, or intravenous rehydration for dehydrated children?",
  "specialty": "Pediatrics",
  "audience": "U.S. physicians and medical trainees",
  "tags": [
    "pediatric dehydration",
    "oral rehydration solution",
    "acute gastroenteritis",
    "nasogastric rehydration",
    "intravenous fluids",
    "pediatric shock"
  ],
  "keyTakeaways": [
    "Use oral rehydration solution (ORS) as first-line therapy for mild-to-moderate dehydration when the child can safely take enteral fluids. [1][20]",
    "Give isotonic intravenous fluid for severe dehydration, shock, altered mental status, ileus, or failure of oral rehydration; transition to ORS when perfusion and mental status recover. [20]",
    "For clinical dehydration from gastroenteritis, administer 50 mL/kg of ORS plus maintenance over 4 hours; administer it in frequent small volumes and reassess clinically. [14]",
    "If a child cannot drink or persistently vomits ORS, use nasogastric ORS before defaulting to intravenous fluids when there is no shock or other enteral contraindication. [14][16]",
    "Treat suspected or confirmed shock with 0.9% sodium chloride 10 mL/kg as a rapid intravenous infusion, repeating 10 mL/kg if shock persists. [14]"
  ],
  "sections": [
    {
      "id": "choose-route-by-severity",
      "eyebrow": "Initial decision",
      "heading": "Choose the rehydration route from perfusion, mentation, and enteral tolerance",
      "intro": "Route selection should be made before calculating a replacement regimen.",
      "paragraphs": [
        "Use ORS for infants and children with mild-to-moderate dehydration who can protect the airway and tolerate enteral administration. ORS is recommended until clinical dehydration resolves; after correction, continue maintenance fluids and replace stool losses with ORS until vomiting and diarrhea stop. [1][20]",
        "Use isotonic intravenous fluid—lactated Ringer's solution or 0.9% sodium chloride—when severe dehydration, shock, altered mental status, ileus, or failed ORS therapy is present. Continue intravenous resuscitation until pulse, perfusion, and mental status normalize and the child is awake without aspiration risk; then replace the remaining deficit enterally with ORS. [20]",
        "For a child with clinical dehydration who cannot drink sufficient ORS or vomits persistently, administer ORS through a nasogastric tube if shock is absent. Escalate to intravenous therapy when vomiting persists despite oral or nasogastric ORS, when clinical deterioration occurs despite ORS, or when shock is suspected or confirmed. [14][16]"
      ],
      "bullets": [
        "Do not use enteral rehydration as the sole initial strategy in shock, altered mental status, ileus, or an aspiration-risk state. [20]",
        "Do not continue an ineffective ORS trial in a child with red-flag deterioration; switch to intravenous fluid therapy. [14]",
        "Reintroduce oral rehydration early during intravenous therapy; if tolerated, stop intravenous fluids and complete rehydration enterally. [14]"
      ],
      "subsections": [],
      "table": {
        "caption": "Route selection for pediatric dehydration. [14][20]",
        "columns": [
          "Clinical branch",
          "Preferred route",
          "Immediate action and reassessment"
        ],
        "rows": [
          [
            "Mild-to-moderate dehydration; safe enteral intake",
            "Oral ORS",
            "Give ORS until clinical dehydration corrects; reassess clinically during therapy. [14][20]"
          ],
          [
            "Cannot drink enough ORS or persistent vomiting without shock",
            "Nasogastric ORS",
            "Use nasogastric ORS; move to IV fluid if ORS is persistently vomited or deterioration occurs. [14][16]"
          ],
          [
            "Severe dehydration, shock, altered mental status, ileus, or failed ORS",
            "Isotonic IV fluid",
            "Continue until pulse, perfusion, and mental status normalize; then complete remaining deficit with ORS when safe. [20]"
          ]
        ]
      }
    },
    {
      "id": "oral-rehydration-protocol",
      "eyebrow": "Enteral treatment",
      "heading": "Deliver oral rehydration over 4 hours and replace ongoing losses",
      "intro": "Use a commercially prepared glucose-electrolyte ORS rather than nonstandard fluids.",
      "paragraphs": [
        "For a child with clinical dehydration due to gastroenteritis, give 50 mL/kg of ORS plus maintenance volume over 4 hours. Administer frequent small amounts rather than large boluses, and reassess clinically during the rehydration interval. [14][16]",
        "A physiologically appropriate ORS contains 70 to 90 mEq/L sodium and no more than 25 g/L glucose. Do not substitute fruit juice or carbonated beverages for ORS during active rehydration; these fluids are specifically excluded from the recommended supplementation options. [24][16]",
        "Continue breastfeeding and other milk feeds after rehydration. For children at increased risk of recurrent dehydration—including those younger than 1 year, particularly younger than 6 months; those with low birth weight; more than five watery stools in 24 hours; or more than two vomiting episodes in 24 hours—consider 5 mL/kg ORS after each large watery stool. [14]"
      ],
      "bullets": [
        "Measure weight before treatment when feasible, and obtain complete vital signs before initiating an ORS pathway. [18]",
        "Use frequent small oral volumes by spoon, syringe, or caregiver-administered dosing when this improves acceptance. [19]",
        "If enteral intake remains inadequate after a structured oral trial, use nasogastric ORS or intravenous fluid according to clinical severity. [14][16]"
      ],
      "subsections": [
        {
          "heading": "When vomiting limits oral rehydration",
          "paragraphs": [
            "Consider a single oral ondansetron dose of 0.2 mg/kg when vomiting is a barrier to ORS in the emergency setting. The purpose is to enable enteral rehydration, not to replace reassessment for shock, altered mental status, or failure of fluid intake. [19]"
          ],
          "bullets": []
        }
      ],
      "table": {
        "caption": "Practical ORS regimen and post-rehydration replacement. [14][16][24]",
        "columns": [
          "Situation",
          "ORS action",
          "What changes management"
        ],
        "rows": [
          [
            "Clinical dehydration from gastroenteritis",
            "50 mL/kg plus maintenance over 4 hours, in frequent small amounts. [14][16]",
            "Regular clinical reassessment determines whether enteral therapy is succeeding or IV escalation is needed. [14]"
          ],
          [
            "Child cannot drink sufficient ORS",
            "Administer ORS through a nasogastric tube. [14][16]",
            "Persistent vomiting of oral or nasogastric ORS warrants IV therapy. [14]"
          ],
          [
            "After rehydration with high risk of recurrent losses",
            "Consider 5 mL/kg ORS after every large watery stool. [14]",
            "Use this strategy particularly in infants, low-birth-weight children, and children with frequent stool or emesis losses. [14]"
          ]
        ]
      }
    },
    {
      "id": "shock-and-intravenous-management",
      "eyebrow": "Resuscitation",
      "heading": "Resuscitate shock with isotonic fluid, then transition promptly to enteral therapy",
      "intro": "In shock, restore circulation before deficit completion.",
      "paragraphs": [
        "For suspected or confirmed shock associated with gastroenteritis, give 0.9% sodium chloride 10 mL/kg as a rapid intravenous infusion. If shock persists after the first infusion, immediately repeat 0.9% sodium chloride 10 mL/kg and reassess the response. [14]",
        "In severe dehydration, continue intravenous rehydration until pulse, peripheral perfusion, and mental status normalize and the child awakens without aspiration risk or ileus. At that point, use ORS to replace the remaining deficit rather than continuing intravenous fluid solely for completion of rehydration. [20]",
        "Obtain serum sodium, potassium, creatinine, blood urea, and glucose in hospitalized children when electrolyte or renal complications may affect fluid planning. Electrolyte testing helps classify dehydration as isotonic, hyponatremic, or hypernatremic, a distinction that changes fluid planning. [4][8]"
      ],
      "bullets": [
        "Use isotonic IV solutions for severe dehydration, shock, altered mental status, failed ORS, or ileus. [20]",
        "Reassess pulse, perfusion, mental status, ability to drink, aspiration risk, and evidence of ileus after each resuscitative step. [20]",
        "During IV therapy, attempt early gradual ORS; discontinue IV fluid and complete rehydration orally when tolerated. [14]"
      ],
      "subsections": [
        {
          "heading": "Hypernatremic dehydration",
          "paragraphs": [
            "Hypernatremic dehydration requires a fluid plan that avoids rapid sodium correction. Initial parenteral hydration uses isotonic fluid, followed by a slightly hypotonic solution for slow correction; sodium-free glucose solution should not be used to rapidly lower serum sodium. [10]"
          ],
          "bullets": [
            "Use serum sodium to identify hypernatremic, isotonic, or hyponatremic dehydration before finalizing replacement strategy in hospitalized children. [8]"
          ]
        }
      ],
      "table": {
        "caption": "Intravenous escalation and transition checkpoints. [14][20]",
        "columns": [
          "Finding",
          "Fluid action",
          "Endpoint or next action"
        ],
        "rows": [
          [
            "Suspected or confirmed shock",
            "0.9% sodium chloride 10 mL/kg rapid IV infusion. [14]",
            "If shock remains, immediately repeat 10 mL/kg of 0.9% sodium chloride. [14]"
          ],
          [
            "Severe dehydration with altered mental status, ileus, or failed ORS",
            "Use isotonic IV fluid. [20]",
            "Continue until pulse, perfusion, and mental status normalize and enteral safety is restored. [20]"
          ],
          [
            "Stable during IV therapy and tolerating ORS",
            "Introduce ORS early and gradually. [14]",
            "Stop IV fluid and complete rehydration enterally if ORS is tolerated. [14]"
          ]
        ]
      }
    },
    {
      "id": "monitor-response-and-disposition",
      "eyebrow": "Reassessment",
      "heading": "Use response to rehydration to determine escalation, discharge, and ongoing replacement",
      "intro": "The therapeutic response is a serial clinical assessment, not a one-time route choice.",
      "paragraphs": [
        "Monitor the response to ORS by repeated clinical assessment. Deterioration despite appropriately delivered ORS, inability to retain oral or nasogastric ORS, or evolution of shock should trigger intravenous fluid therapy rather than extending an unsuccessful enteral trial. [14][16]",
        "After clinical rehydration, maintain fluid intake and replace continuing stool losses with ORS until diarrhea and vomiting resolve. Continue breastfeeding and other milk feeds; children at high risk for recurrent dehydration may receive 5 mL/kg ORS after each large watery stool. [20][14]",
        "Use a bedside glucose measurement as part of an emergency department ORS assessment pathway. In a child with ketonemia, an initial intravenous hydration course may be needed to permit later oral rehydration tolerance. [19][20]"
      ],
      "bullets": [
        "Discharge planning requires a child who is clinically rehydrated and able to continue ORS and usual feeds outside the monitored setting. [14][20]",
        "Provide a specific ongoing-loss plan rather than advising unrestricted free-water intake: ORS is the recommended replacement fluid for ongoing stool losses. [20]",
        "For children requiring hospitalization or IV therapy, include sodium, potassium, creatinine, blood urea, and glucose when results will direct fluid planning or identify complications. [4][8]"
      ],
      "subsections": [],
      "table": {
        "caption": "Response-based monitoring after rehydration begins. [14][20]",
        "columns": [
          "Reassessment finding",
          "Interpretation",
          "Next step"
        ],
        "rows": [
          [
            "Pulse, perfusion, and mental status normalize; child awakens and has no aspiration risk or ileus",
            "IV resuscitation endpoint reached. [20]",
            "Complete remaining deficit with ORS and maintain enteral fluids. [20]"
          ],
          [
            "Persistent vomiting of oral or nasogastric ORS",
            "Enteral rehydration has failed. [14]",
            "Use intravenous fluid therapy. [14]"
          ],
          [
            "Clinical deterioration despite ORS",
            "Higher-acuity dehydration or another process must be assumed. [14]",
            "Escalate to IV therapy and reassess for shock. [14]"
          ],
          [
            "Ongoing watery stool losses after rehydration",
            "Risk of recurrent volume depletion. [20]",
            "Replace losses with ORS; consider 5 mL/kg after each large watery stool in high-risk children. [14][20]"
          ]
        ]
      }
    }
  ],
  "faq": [
    {
      "question": "When should nasogastric ORS be used instead of intravenous fluid?",
      "answer": "Use nasogastric ORS when a clinically dehydrated child cannot drink adequate ORS or persistently vomits but does not have shock. Escalate to IV fluid if nasogastric ORS is persistently vomited or the child deteriorates. [14][16]"
    },
    {
      "question": "Which IV fluid should be used when pediatric dehydration requires parenteral treatment?",
      "answer": "Use isotonic fluid—0.9% sodium chloride or lactated Ringer's solution—for severe dehydration, shock, altered mental status, ileus, or ORS failure. For gastroenteritis-associated shock, NICE specifies rapid 0.9% sodium chloride 10 mL/kg, repeated once immediately if shock persists. [14][20]"
    }
  ],
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  ],
  "editorialNote": "Prepared from cited clinical literature using Astra's research workflow. Verify recommendations against current guidance and patient-specific factors.",
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      "authors": "www.thelancet.com",
      "host": "www.thelancet.com",
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    {
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      "url": "https://www.nejm.org/doi/full/10.1056/NEJMoa055119",
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      "host": "www.nejm.org",
      "snippet": "Although oral-rehydration therapy is recommended for children with mild-to-moderate dehydration, it remains underused. Clinicians who provide",
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    {
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      "authors": "www.sciencedirect.com",
      "host": "www.sciencedirect.com",
      "snippet": "Title: Dehydration Syndromes: Oral Rehydration and Fluid Replacement - ScienceDirect\n# Dehydration Syndromes: Oral Rehydration and Fluid Replacement. Dehydration caused by diarrhea remains a major source of morbidity and mortality worldwide. Laboratory studies are helpful in categorizing the dehydra",
      "score": 0.7135319
    },
    {
      "number": 9,
      "title": "Comparison of ultrarapid and rapid intravenous hydration in pediatric patients with dehydration - ScienceDirect",
      "detail": "www.sciencedirect.com",
      "url": "https://www.sciencedirect.com/science/article/abs/pii/S0735675708007158",
      "authors": "www.sciencedirect.com",
      "host": "www.sciencedirect.com",
      "snippet": "Title: Comparison of ultrarapid and rapid intravenous hydration in pediatric patients with dehydration - ScienceDirect\nThe purpose of this study is to test the efficacy of ultrarapidly infused vs rapidly infused intravenous (IV) hydration in pediatric patients with acute gastroenteritis and moderate",
      "score": 0.6991933
    },
    {
      "number": 10,
      "title": "Oral Rehydration Therapy - an overview",
      "detail": "www.sciencedirect.com",
      "url": "https://www.sciencedirect.com/topics/neuroscience/oral-rehydration-therapy",
      "authors": "www.sciencedirect.com",
      "host": "www.sciencedirect.com",
      "snippet": "Oral rehydration therapy is currently the treatment of choice for children with mild to moderate dehydration due to diarrheal diseases.4,19 Considering the potential of life-threatening hyponatremia in dehydrated children rehydrated parenterally using hypotonic saline solutions, the accelerated intr",
      "score": 0.63234437
    },
    {
      "number": 11,
      "title": "Re: Nasogastric Rehydration In Acute Gastroenteritis - Yiu - 2003",
      "detail": "onlinelibrary.wiley.com",
      "url": "https://onlinelibrary.wiley.com/doi/full/10.1046/j.1440-1754.2003.t01-5-00121.x",
      "authors": "onlinelibrary.wiley.com",
      "host": "onlinelibrary.wiley.com",
      "snippet": "Enteral fluid therapy was successful in the majority of our patients (88%). Only nine children received intravenous fluid for dehydration alone.",
      "score": 0.41179726
    },
    {
      "number": 12,
      "title": "Cochrane review: Oral versus intravenous rehydration for treating ...",
      "detail": "onlinelibrary.wiley.com",
      "url": "https://onlinelibrary.wiley.com/doi/abs/10.1002/ebch.121",
      "authors": "onlinelibrary.wiley.com",
      "host": "onlinelibrary.wiley.com",
      "snippet": "Dehydration associated with gastroenteritis is a serious complication. Oral rehydration is an effective and inexpensive treatment, but some",
      "score": 0.3996482
    },
    {
      "number": 13,
      "title": "Recommendations for research | Diarrhoea and vomiting caused by gastroenteritis in under 5s: diagnosis and management  | Guidance | NICE",
      "detail": "www.nice.org.uk",
      "url": "https://www.nice.org.uk/guidance/cg84/chapter/Recommendations-for-research",
      "authors": "www.nice.org.uk",
      "host": "www.nice.org.uk",
      "snippet": "Most children with clinical dehydration should be treated with oral rehydration therapy, but some require intravenous fluid therapy because they are shocked or they cannot tolerate oral rehydration therapy. Rehydration with oral rehydration therapy is usually carried out over a period of 4 hours. Re",
      "score": 0.8703443
    },
    {
      "number": 14,
      "title": "Recommendations | Diarrhoea and vomiting caused by gastroenteritis in under 5s: diagnosis and management  | Guidance | NICE",
      "detail": "www.nice.org.uk",
      "url": "https://www.nice.org.uk/guidance/cg84/chapter/Recommendations",
      "authors": "www.nice.org.uk",
      "host": "www.nice.org.uk",
      "snippet": "monitor the response to oral rehydration therapy by regular clinical assessment.\n\n#### 1.3.3 Intravenous fluid therapy\n\n##### 1.3.3.1\n\nUse intravenous fluid therapy for clinical dehydration if:\n\nshock is suspected or confirmed\n\na child with red flag symptoms or signs (see table 1) shows clinical evi",
      "score": 0.8252664
    },
    {
      "number": 15,
      "title": "[PDF] Diarrhoea and vomiting: full guideline - NICE",
      "detail": "www.nice.org.uk",
      "url": "https://www.nice.org.uk/guidance/cg84/documents/diarrhoea-and-vomiting-in-children-under-5-full-guideline2",
      "authors": "www.nice.org.uk",
      "host": "www.nice.org.uk",
      "snippet": "secondary care in methods of rehydration therapy used in treating children presenting with dehydration. The GDG identified a single clinical question comparing the effectiveness and safety of oral rehydration therapy (ORT) against intra-venous therapy (IVT) in children with dehydration. The GDG thou",
      "score": 0.77994305
    },
    {
      "number": 16,
      "title": "[PDF] Diarrhoea and vomiting caused by gastroenteritis in under 5s - NICE",
      "detail": "www.nice.org.uk",
      "url": "https://www.nice.org.uk/guidance/cg84/resources/diarrhoea-and-vomiting-caused-by-gastroenteritis-in-under-5s-diagnosis-and-management-pdf-975688889029",
      "authors": "www.nice.org.uk",
      "host": "www.nice.org.uk",
      "snippet": "Page 27 of 32 Why the recommendation for research was made Most children with clinical dehydration should be treated with oral rehydration therapy, but some require intravenous fluid therapy because they are shocked or they cannot tolerate oral rehydration therapy. Rehydration with oral rehydration ",
      "score": 0.77792513
    },
    {
      "number": 17,
      "title": "Pediatric hydration therapy: Historical review and a new approach",
      "detail": "www.kidney-international.org",
      "url": "https://www.kidney-international.org/article/S0085-2538(15)50472-9/fulltext",
      "authors": "www.kidney-international.org",
      "host": "www.kidney-international.org",
      "snippet": "(2) In patients with moderate dehydration, oral rehydration therapy (25 to 50mL/kg over 6 to 12 hours) should be sufficient. However, if intravenous rehydration",
      "score": 0.7348247
    },
    {
      "number": 18,
      "title": "Pediatric Oral Rehydration Therapy (ORT) | Pediatric Emergency Medicine",
      "detail": "www.acep.org",
      "url": "https://www.acep.org/pediatrics/resources/resource-articles/pediatric-oral-rehydration-therapy-ort",
      "authors": "www.acep.org",
      "host": "www.acep.org",
      "snippet": "References\n\n National Guideline Clearinghouse. (2004). Evidence based clinical practice guideline for children with acute gastroenteritis (AGE). Retrieved April 29, 2004.\n Newberry, L. (Ed.). (2003). Sheehy's emergency nursing: principles and practice (5th ed.). St. Louis: Mosby.\n ]The University of",
      "score": 0.6654328
    },
    {
      "number": 19,
      "title": "Oral Rehydration Therapy | Pediatric Emergency Medicine",
      "detail": "www.acep.org",
      "url": "https://www.acep.org/pediatrics/resources/resource-articles/oral-rehydration-therapy",
      "authors": "www.acep.org",
      "host": "www.acep.org",
      "snippet": "1. American Academy of Pediatrics. Practice parameter: The management of acute gastroenteritis in young children. Pediatrics, 1996; 97: 424-436.\n2. Baker SS, Davis AM. Hypocaloric oral therapy during an episode of diarrhea and vomiting can lead to severe malnutrition. J Ped Gastro and Nutrition, 199",
      "score": 0.6504012
    },
    {
      "number": 20,
      "title": "Infectious Diarrhea - IDSA",
      "detail": "www.idsociety.org",
      "url": "https://www.idsociety.org/practice-guideline/infectious-diarrhea",
      "authors": "www.idsociety.org",
      "host": "www.idsociety.org",
      "snippet": "4. In severe dehydration, intravenous rehydration should be continued until pulse, perfusion, and mental status normalize and the patient awakens, has no risk factors for aspiration, and has no evidence of ileus (strong, low). The remaining deficit can be replaced by using ORS (weak, low). Infants, ",
      "score": 0.5366292
    },
    {
      "number": 21,
      "title": "Oral versus intravenous rehydration for treating dehydration due to ...",
      "detail": "www.cochranelibrary.com",
      "url": "https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD004390.pub2/references",
      "authors": "www.cochranelibrary.com",
      "host": "www.cochranelibrary.com",
      "snippet": "Oral fluid therapy of Apache children ... Reduced osmolarity oral rehydration solution for treating dehydration due to diarrhoea in children: systematic review.",
      "score": 0.5194
    },
    {
      "number": 22,
      "title": "Diarrhea and Oral Rehydration Therapy - ACEP",
      "detail": "www.acep.org",
      "url": "https://www.acep.org/pediatrics/resources/resource-articles/diarrhea-and-oral-rehydration-therapy",
      "authors": "www.acep.org",
      "host": "www.acep.org",
      "snippet": "Pediatric Oral Rehydration Therapy (ORT) · Vomiting, Diarrhea, Dehydration Treatment in the Pediatric ED at Edward Hospital Naperville, Ill.",
      "score": 0.44087905
    },
    {
      "number": 23,
      "title": "Index of Suspicion | Pediatrics In Review - AAP Publications",
      "detail": "publications.aap.org",
      "url": "https://publications.aap.org/pediatricsinreview/article/22/12/413/36467/Index-of-Suspicion",
      "authors": "publications.aap.org",
      "host": "publications.aap.org",
      "snippet": "dehydration, electrolytes, glucose, Laboratory testing reveals mild hyponatremia (sodium, A bedside glucose level is 69 mg/dL. Blood analysis",
      "score": 0.49626526
    },
    {
      "number": 24,
      "title": "Dehydration (Chapter 353) | Pediatric Care Online - AAP Publications",
      "detail": "publications.aap.org",
      "url": "https://publications.aap.org/pediatriccare/book/348/chapter/5788423/Dehydration-Chapter-353",
      "authors": "publications.aap.org",
      "host": "publications.aap.org",
      "snippet": "A physiologically appropriate ORS contains 70 to 90 mEq/L sodium and not more than 25 g/L of glucose. In addition, an ORS typically contains 20 mEq/L of",
      "score": 0.47753036
    }
  ],
  "publishedAt": "2026-09-15T22:22:55.103981+00:00",
  "updatedAt": "2026-09-15T22:22:55.103981+00:00",
  "readingMinutes": 5,
  "slug": "pediatric-dehydration-rehydration"
}