Paramedic Recert EMS Care | 23-MCIT-F3-4114 | Fluid Resuscitation starts with the introduction to the topic.

The chapter discusses how to effectively manage  fluid and electrolyte imbalances under medical emergency settings. The lessons delve into fluid/IV/IO therapies, Blood related procedures,  and recent advances in this field. The other aspects covered are Pre-Hospital use of mean arterial pressure and tailored approaches to fluid resuscitation.

The lessons covered are

• Lesson 1: Fluids and Electrolytes
• Lesson 2: Advances in Fluid Resuscitation
• Lesson 3: Fluid Resuscitation in Specific Medical Emergencies
• Lesson 4: Fluid Resuscitation in Trauma Cases
• Lesson 5: Potential Complications & Special Patient Populations

Excerpt from  Paramedic Recert EMS Care | 23-MCIT-F3-4114 | Fluid Resuscitation 

Isotonic Solutions

IV solutions are categorized by tonicity: isotonic, hypotonic, and hypertonic. Isotonic solutions have the same sodium concentration as cells and expand the intravascular compartment without altering cell shape. Examples include normal saline and LR. Hypotonic solutions have lower sodium concentration and can cause cells to swell. D5W is an example. Hypertonic solutions have higher sodium concentration and draw water out of cells. Examples include 3% saline, blood products, and albumin. Care must be taken to avoid fluid overloading when administering isotonic solutions.

Hypotonic Solutions

Hypotonic solutions have lower sodium concentration than cells, causing cells to swell. They hydrate cells but deplete the vascular compartment. They are used in conditions like hyperglycemia and may cause fluid shifts leading to cardiovascular collapse and increased intracranial pressure. Administering hypotonic solutions to patients with burns, trauma, or liver disease is hazardous due to potential fluid shifts. An example is 0.45% sodium chloride, rarely used prehospitally but in interfacility transports for fluid replenishment in patients with normal sodium levels.

Hypertonic Solutions

Hypertonic solutions have higher osmolarity than serum, pulling fluid into the intravascular compartment. They stabilize blood pressure, increase urine output, and reduce edema but may cause cellular collapse due to increased extracellular osmotic pressure. These solutions are rarely used prehospitally but are common in interfacility transports. Careful monitoring is necessary to prevent fluid overloading, especially in patients with heart or kidney issues. They are contraindicated in diabetic ketoacidosis or cellular dehydration. An example is 3% sodium chloride, used for severe traumatic brain injuries to reduce intracranial pressure temporarily.

Oxygen-Carrying Solutions

Whole blood is the optimal choice for blood loss replacement due to its hemoglobin content, which carries oxygen. O-negative blood may be used outside hospitals for specific incidents but is impractical prehospitally due to storage requirements. Synthetic blood substitutes, under research and field testing, offer potential benefits by expanding volume and delivering oxygen to cells, promising improved treatment for significant blood loss.