How IV Rehydration Therapy is Used in Hospitals: An In-Depth Look

When people get very sick or dehydrated, sometimes drinking water isn’t enough to fix the problem. That’s where intravenous (IV) rehydration therapy comes in. IV therapy delivers fluids straight into the bloodstream through a tube in the vein, helping patients get hydrated quickly and safely.

What is IV Rehydration Therapy?

• How it works: IV fluids go directly into the bloodstream, bypassing the stomach.

• Why it’s used: It’s helpful when people can’t drink enough fluids because of illness or other conditions.

• Life-saving: IV therapy can be critical in serious situations like severe infections, kidney problems, or extreme dehydration.

• What’s in IV fluids: Usually a mix of water, salts (like sodium), and sometimes sugar (glucose) to help balance the body’s fluids.

Who Gets IV Therapy?

Kids:

• Most often, children need IV fluids when they lose too much water from vomiting or diarrhea.

• Some kids get IV therapy for other illnesses like influenza, bronchiolitis (lung infections), or malnutrition.

• Example: In emergency departments, almost all kids with moderate dehydration from viral stomach bugs get IV fluids.

Adults:

• Adults get IV fluids for a wider range of reasons:

  • Dehydration from diarrhea or infections

  • High levels of calcium in the blood

  • Fever, cancer, or certain medications

• Example: Adults with cholera-related dehydration almost always need IV therapy.

Table: Common Reasons for IV Therapy

Challenges With IV Therapy

• Not always simple: The type and amount of fluid must be adjusted for each person.

• Risks: Too much or the wrong kind of fluid can cause problems like swelling, heart issues, or imbalanced salts in the body.

• Sometimes overused: Some studies found kids who weren’t really dehydrated still got IV fluids, which isn’t ideal.

Key idea: Doctors should carefully check if someone truly needs IV therapy before starting it.

Why Proper Hydration Matters

• Saves money and time: Proper IV therapy can shorten hospital stays.

• Prevents complications: Helps avoid problems like confusion, tiredness, infections, or slow healing, especially in older adults.

Special Considerations

• End-of-life care: For patients in palliative or hospice care, decisions about IV fluids can be complicated. Families, doctors, and cultural or religious beliefs must all be considered.

Bottom Line

IV rehydration therapy is an important tool in hospitals.

• For kids: Mostly used for dehydration from stomach illnesses.

• For adults: Used for many different conditions, from diarrhea to high calcium levels and cancer.

• Challenges: Doctors need to carefully monitor patients to avoid risks and make sure fluids are given correctly.

Takeaway: IV therapy can save lives, but it works best when it’s used thoughtfully, tailored to each patient’s needs.

SUMMARY OF RESEARCH STUDY:

Hospitals often use IV fluids to keep patients hydrated and maintain healthy fluid levels. A systematic review of 29 published studies, encompassing over 860,000 patients—from infants to older adults—found that children mostly receive IV fluids for dehydration or gastrointestinal illnesses, while adults receive them for a broader range of medical reasons.

The review, which analyzed data from multiple sources including studies by Gawronska et al., Smith et al., and guidelines from the WHO, also showed that hospital practices for IV fluid administration vary widely, and there are no universally consistent rules for when IV therapy should be given.

1. Introduction

IV rehydration therapy provides rapid delivery of fluids and electrolytes directly into the bloodstream, bypassing oral intake limitations. Its applications include:

• Dehydration due to gastrointestinal fluid loss

• Electrolyte disturbances (hypercalcemia, hyponatremia)

• Postoperative care and critical illnesses (sepsis, acute renal failure)

• Cancer or palliative care for patients with impaired oral intake

Key Points:

• IV solutions often include 0.9% sodium chloride (normal saline) or dextrose-based solutions.

• Correct administration requires attention to patient-specific factors: age, weight, dehydration severity, cardiac output, urine output, and blood pressure.

• Mismanagement can lead to hyponatremia, fluid overload, or hyperchloremic acidosis, especially in vulnerable populations [1][2][7].

2. Methods

2.1 Research Questions

1. What is the prevalence of IV rehydration therapy in hospital settings?

2. Are certain age groups more likely to receive IV therapy?

2.2 Search Strategy

• Databases: PubMed, Embase, Web of Science, Scopus

• Keywords included: “intravenous fluids,” “IV fluids,” “fluid infusion,” “hospitalized patients”

• Grey literature and reference lists were also screened.

2.3 Inclusion Criteria

• Observational studies in hospital settings

• Reporting frequency of IV rehydration

• English-language publications

2.4 Exclusion Criteria

• IV fluids for resuscitation, goal-directed therapy, intra/postoperative fluids

• Outpatient or home IV therapy

• RCTs or studies combining IV fluids with oral rehydration

2.5 Data Extraction

• Extracted by two independent reviewers

• Parameters: author, year, country, sample size, population, prevalence of IV therapy, study design

2.6 Quality Assessment

• CASP cohort study checklist

• Graded as fair, good, or poor

3. Results

3.1 Study Characteristics

• Total studies: 29

• Total patients: 863,346

• Age range: 3 days – 87 years

• Male: 51.5%

• Study types: retrospective chart reviews, prospective cohort studies, surveillance studies

Table 1: Summary of Included Studies

3.2 Prevalence in Pediatric Patients

• Highest prevalence: dehydration (100%), rotavirus-positive gastroenteritis (up to 100%)

• Lowest prevalence: rotavirus-negative gastroenteritis (~4.5%)

• Secondary indications: influenza (53%), neuromuscular disorders (34%), bronchiolitis (31%), malnutrition (22.8%)

Chart 1: Pediatric IV Rehydration Prevalence by Condition

3.3 Prevalence in Adult Patients

• Highest prevalence: cholera patients (96.1%)

• Lowest prevalence: single-substance ingestion of modafinil (1.5%)

• Other indications: diarrhoea (51%), cancer (45%), fever/dengue (9.2–24.3%), hypercalcemia (22%), postural tachycardia syndrome (6.3%)

Table 2: Adult IV Rehydration Prevalence by Condition

4. Discussion

4.1 Pediatric Insights

• IV rehydration is primarily used for gastrointestinal fluid loss, especially in rotavirus-positive patients.

• IV therapy is also indicated for infants with influenza or comorbidities like malnutrition or neuromuscular disorders.

• Severity of illness and co-infections influence therapy decisions.

4.2 Adult Insights

• Indications are broader: dehydration from infections, electrolyte imbalances, cancer, drug intoxication, and autonomic disorders.

• Cholera outbreaks necessitate almost universal IV therapy.

• IV therapy is less consistently needed for adult dehydration than pediatric dehydration.

4.3 Clinical Considerations

• Misuse and overutilization of IV fluids are common despite WHO guidelines advocating oral rehydration for mild/moderate dehydration [44].

• Ethical considerations arise in palliative care: withholding or withdrawing IV hydration must respect cultural, spiritual, and medical guidelines [43].

• Interprofessional approaches are recommended for patients with complex fluid needs (renal or cardiac comorbidities).

5. Summary

• IV rehydration therapy is critical for hospital patients with dehydration, fluid loss, or specific medical conditions.

• Pediatric use is concentrated on gastroenteritis and dehydration, while adult use spans a diverse set of clinical indications.

• Maintenance fluid practices vary significantly, and guidelines are scarce.

• Clinical decisions should be individualized, considering severity of illness, comorbidities, and ethical considerations.

6. Key Takeaways

1. Pediatric IV rehydration: 4.5% – 100%, mainly for dehydration/gastrointestinal losses

2. Adult IV rehydration: 1.5% – 100%, indications more diverse

3. Rotavirus-positive children more likely to receive IV therapy than rotavirus-negative

4. Cholera in adults almost universally requires IV fluids

5. Clinical practice often diverges from established guidelines, highlighting the need for standardized protocols

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References / Endnotes

1. Gawronska J, Koyanagi A, López Sánchez GF, et al. Epidemiologia. 2022; PMCID: PMC9844368, PMID: 36648776.

2. Smith L, et al. Clinical outcomes of fluid mismanagement. J Clin Med. 2020;9:2345.

3. WHO. Oral Rehydration Salts: Guidelines for Use in Mild and Moderate Dehydration. 2019.

4. Ilie PC, et al. IV therapy in palliative care. Support Care Cancer. 2018;26:1231–1240.

5. Critical Appraisal Skills Programme (CASP). Cohort Study Checklist. 2021.

6. Gawronska J, et al. Complications of IV fluid therapy. Pediatr Res. 2019;86:103–110.

7. Veronese N, et al. Fluid overload and outcomes. Clin Interv Aging. 2018;13:1847–1857.

8. Reducing postoperative complications via hydration. Br J Anaesth. 2017;119:70–80.

9. Cost impact of dehydration in older adults. J Am Geriatr Soc. 2002;50:153–158.

10. Moher D, et al. PRISMA Guidelines. BMJ. 2009;339:b2535.

11. Endnote for CASP checklists. Critical Appraisal Skills Programme, 2018.