NUR 232 Week 6 Student view

Week Overview

ECV Deficit: Hypovolemia due to inadequate extracellular fluid volume leads to low blood pressure and reduced blood flow to organs.
Optimal ECV: Maintained equilibrium of extracellular fluid volume is necessary for proper cellular function and overall homeostasis.
ECV Excess: Hypervolemia with fluid overload can lead to conditions such as congestive heart failure and pulmonary edema.
Electrolyte Concentrations:
- Hypokalemia: K+ < 3.5 mEq/L (low potassium), can cause muscle weakness, cramps, and cardiac dysrhythmias.
- Optimal K+ Concentration: K+ = 3.5-5.0 mEq/L is essential for normal nerve and muscle function.
- Hyperkalemia: K+ > 5.0 mEq/L (high potassium) may lead to cardiac arrest if not addressed.
Osmolality Imbalances:
- Optimal Osmolality: 280-300 mosmol/kg is crucial for maintaining cell integrity.
- Too Dilute: Osm < 280 mosmol/kg can result in cellular swelling and potential rupture.
- Too Concentrated: Osm > 300 mosmol/kg can lead to cellular dehydration and dysfunction.

Risk Factors:

Vomiting, diarrhea, malabsorption, fever, inadequate/excessive fluid/electrolytes intake.
Certain medications (e.g., diuretics, steroids) and chronic medical conditions (e.g., kidney disease, heart failure).

Assessment: Measurement of intake and output is crucial to evaluate fluid status.
Adjustments: Special considerations for patients with specific health issues, such as renal disease, might necessitate individualized fluid management.
Parenteral Fluid Therapy: Indicated for patients unable to take oral intake due to surgery, severe vomiting, or coma.

Definition: The process of regulating body fluids' pH, bicarbonate concentration, and partial pressure of carbon dioxide, essential for various physiological processes.
Optimal Balance: Achieving a neutral or optimal pH level in the body fluids (approximately 7.35-7.45).
Imbalances:
- Acidosis: Excess acid in the body fluids, which can lead to reduced nervous system function and decreased heart contractility.
- Alkalosis: Deficiency of acid in the body fluids, potentially causing muscle twitching and arrhythmias.

Acid-Base Imbalances:
- Respiratory Problems:
  - Acidosis: Excess carbonic acid due to hypoventilation, often seen in lung disease.
  - Alkalosis: Depletion of carbonic acid due to hyperventilation, often during anxiety or panic attacks.
- Metabolic Problems:
  - Acidosis: Excess metabolic acid or loss of bicarbonate, can result from kidney failure or severe diarrhea.
  - Alkalosis: Gain of bicarbonate or loss of metabolic acid, often caused by excessive vomiting or diuretic use.

Respiratory Acidosis:
- Causes: COPD, hypoventilation, and drug overdose.
- Manifestations: Headache, confusion, decreased level of consciousness (LOC), and respiratory distress.
Metabolic Acidosis:
- Causes: Diabetic ketoacidosis, renal failure, and prolonged diarrhea.
Respiratory Alkalosis:
- Causes: Hyperventilation and panic attacks, resulting in lightheadedness and tingling in extremities.
Metabolic Alkalosis:
- Causes: Excessive vomiting and diuretic therapy, leading to muscle cramps and weakness.

Focus on supporting compensatory mechanisms for acid-base imbalances, which may include administering bicarbonate in acidosis or providing oxygen therapy in respiratory disorders.
Regular monitoring for complications, such as cardiac disturbances associated with electrolyte shifts, and implementing safety measures, such as fall precautions.
Patient Education: Emphasize the importance of recognizing early problems related to chronic conditions, including symptoms that warrant immediate medical attention.

Definition: The body’s local response to harmful stimuli such as injuries or infections, which is crucial for healing and immune defense.
Signs of Inflammation: Pain, warmth, swelling, and redness at the site of injury or infection.

Key elements include identifying inflammatory triggers (such as infections or injury), noting symptoms, and assessing recent injuries.
Symptoms: Common presentations in children may include swelling, pain, fatigue, and the duration of symptoms, which are vital for diagnosis.

Dehydration:
- Common in cases of gastroenteritis, leading to significant fluid loss via vomiting and diarrhea.
- Treatment: Focus on rehydration using oral rehydration therapy (ORT) or intravenous fluids in severe cases.

Constipation: Characterized by difficulties in stool passage and infrequent bowel movements, often requiring lifestyle modifications and potential laxative use.
Hirschsprung Disease: A congenital condition affecting bowel motility due to the absence of nerve cells in sections of the bowel.
- Symptoms: Include failure to pass meconium within the first 24-48 hours of life and abdominal distention; may manifest later in childhood as severe constipation and abdominal pain.
- Diagnostic Evaluation: Involves thorough history taking and may require a contrast enema.

Acute Appendicitis: The most common cause of emergency abdominal surgery in children, necessitating rapid assessment to avoid perforation.
- Manifestations: Right lower quadrant pain, fever, and abdominal rigidity. Early recognition of symptoms can reduce complications significantly.
- Complications: Can occur within 48 hours if not treated, with risks including perforation and subsequent peritonitis.
Therapeutic Management:
- Surgical removal (appendectomy) is necessary for definitive treatment.
- Preoperative care includes IV fluid administration, pain management, and antibiotic therapy.
- Postoperative management involves monitoring for complications, pain control, resuming normal diet as tolerated, and education for caregivers regarding follow-up care and signs of complications.