IV Fluids and Nutrition Lecture Notes

Lecture Notes on IV Fluids and Nutrition

Introduction

  • Instructor expresses apologies for being sick but intends to proceed with the lecture.

  • Noting that if they lose their voice, another instructor, Kaylee, will assist.

  • Lecture focuses on IV fluids and nutrition as part of Unit 3.

Reminders and Due Dates

  • Exam 2: Focus on Units 1, 2, and 3, scheduled to open on Monday and close on Wednesday, February 28. Exam will include dosage calculation questions.

  • Information Literacy Assignment: Due on February 15.

  • Doctoral Exam: Scheduled for week thirteen (March 20).

  • Medication Application Assignment: To be completed during clinical experiences.

Overview of IV Fluids

  • The lecture covers IV solutions, starting with fluids and nutrition.

  • Depicts IV solutions as categorized into three types: crystalloids, colloids, and Total Parenteral Nutrition (TPN).

  • Importance of understanding body fluid composition:

    • Intracellular Fluid: Approximately two-thirds of total body fluid located within cells.

    • Extracellular Fluid: One-third, including plasma and interstitial fluid.

Fluid Spacing in Nursing

  • First Spacing: Normal distribution of fluid, within intracellular and extracellular spaces.

  • Second Spacing: Abnormal accumulation known as edema (e.g., fluid in the hands or legs).

  • Third Spacing: Fluid accumulation in areas such as the peritoneal cavity or pleura; indicates abnormal fluid location and may require intervention.

Basic Principles of Fluid Movement

  • Osmosis: Movement of water across a membrane, flows from areas of low solute concentration to higher concentration.

  • Osmolality: Concentration of blood and fluids; essential in explaining how IV fluids interact with the body.

  • Tonicity: Refers to solution concentration relative to blood plasma.

Types of IV Solutions

1. Crystalloid Solutions

  • Isotonic Solutions:

    • Tonicity equivalent to normal plasma; maintains fluid balance (e.g., 0.9% Sodium Chloride (NS)).

    • Used for large fluid losses, such as in vomiting and blood loss.

  • Hypotonic Solutions:

    • Greater concentration of water relative to solutes; causes cells to swell (e.g., 0.45% NS).

    • Used when cells are dehydrated.

  • Hypertonic Solutions:

    • Higher solute concentration than plasma; draws water out of cells (e.g., 3% NS, 5% NS).

    • Reserved for severe conditions like cerebral edema.

2. Colloid Solutions

  • Larger molecules that remain in the vascular system longer compared to crystalloids (e.g., albumin, dextran).

  • Indicated for conditions like massive hemorrhage or shock.

  • Operate as true volume expanders; able to maintain hemodynamics with less volume.

3. Total Parenteral Nutrition (TPN)

  • TPN provides complete nutritional support to patients unable to take any oral feeds.

  • Requires administration via central line due to high caloric density and osmolality.

  • Can contain amino acids, glucose, fats, vitamins, and minerals.

IV Fluid Administration Overview

  • Large Volume Infusion: Continuous administration over time; e.g., 1200 mL over 8 hours.

  • Intermittent Infusion: Smaller amounts given separately; e.g., antibiotics.

  • Bolus Infusion: Rapid administration of fluids for emergency treatments.

Complications Associated with IV Fluids

TPN Complications

  • Metabolic Complications: Hyperglycemia, fluid overload, and refeeding syndrome.

  • Electrolyte Imbalances: Frequent monitoring essential due to rapid changes in metabolic needs.

  • Mechanical Complications: Catheter occlusion, thrombolytics as a potential treatment option.

Blood Transfusion Reactions

  • Proper protocol involves monitoring vital signs and assessing any signs of reaction.

  • Transfusion Types: Whole blood, packed red blood cells, platelets, fresh frozen plasma, etc.

  • Adverse Reactions:

    • Mild Allergic Reaction: Flushing, itching, rash. Manage with antihistamines.

    • Severe Allergic Reaction (Anaphylaxis): Immediate cessation of transfusion, initiating code protocol, IV fluids, and epinephrine.

    • Nonhemolytic Febrile Reaction: Associated with donor white blood cells; managed with antipyretics.

    • Acute Hemolytic Reaction: Due to ABO incompatibility; immediate action required, risk of renal failure and shock.

    • Septic Reaction: Caused by contaminations; requires stop of transfusion and management of sepsis.

Key Points for Safe Practice in IV Administration

  • Always double-check patient and product compatibility prior to administration.

  • Maintain sterile technique to minimize risks of infection and complications.

  • Recognize and treat reactions promptly: Stop transfusion, notify provider, assess and document.

Wrap-up Activities

  • Lecture closes with plans for future participation in interactive activities involving blood types and further applications of the knowledge covered.