Intravenous Fluids in Hospitalized Patients: A Review of Best Practices

Area of Science:

• Internal Medicine
• Nephrology
• Critical Care Medicine

Background:

• Intravenous (IV) fluid administration is a common intervention in hospitalized patients.
• The choice of IV fluid impacts patient outcomes and can lead to adverse events.
• Understanding the appropriate use of different IV fluid types is crucial for clinical practice.

Purpose of the Study:

• To review the appropriate use of various intravenous fluid types in hospitalized patients.
• To compare the benefits and risks of balanced crystalloids versus normal saline.
• To outline indications for specific IV fluid formulations like hypertonic saline and hypotonic fluids.

Main Methods:

• Literature review and synthesis of current evidence on IV fluid therapy.
• Analysis of clinical scenarios and fluid selection criteria.
• Discussion of adverse events associated with specific fluid types, such as normal saline.

Main Results:

• Balanced crystalloids generally offer advantages over normal saline for routine fluid resuscitation, though outcome differences are often small.
• Excessive normal saline can lead to metabolic acidosis and kidney injury.
• Specific indications exist for normal saline (e.g., sodium/chloride deficits), hypertonic saline (severe hyponatremia), and hypotonic fluids (free water deficits).
• Intravenous albumin is reserved for specific cirrhosis-related scenarios and not recommended for routine volume resuscitation over crystalloids.

Conclusions:

• Careful selection and administration of IV fluids are essential for optimizing patient outcomes and preventing harm.
• Balanced crystalloids are often preferred, but fluid choice should be tailored to the patient's specific condition and electrolyte status.
• Close monitoring of patient response is critical to guide ongoing IV fluid therapy.