Calcium Imbalance Vocabulary

Overview of Calcium Homeostasis

  • Normal Calcium Range: The standard physiological range for calcium levels in the body is 8.58.5 to 10.510.5.
  • Primary Functions of Calcium:     * Muscle Contraction: Facilitates the necessary movements within the muscular system.     * Heart Function: Essential for the proper electrical and mechanical operation of the cardiac muscle.     * Nerve Transmission: Plays a critical role in the sending of signals throughout the nervous system.     * Bone Strength: Serves as a foundational component for skeletal integrity and density.

Hypocalcemia

  • Definition: Hypocalcemia is defined as a calcium level lower than 8.58.5.
  • Pathophysiology: In a state of low calcium, the nerves and muscles become over-excited. Specifically, low calcium causes the nerves to fire too much.
  • Causes of Hypocalcemia:     * Low Vitamin D levels.     * Kidney disease.     * Hypoparathyroidism.     * Pancreatitis.     * Poor nutrition.     * Multiple blood transfusions.
  • Symptoms and Clinical Presentation:     * Muscle spasms.     * Tetani (tetany).     * Twitching.     * Tingling sensations located specifically around the mouth and fingers.     * Hyperactive reflexes.
  • Severe Signs and Complications:     * Seizures.     * Laryngospasms.     * Dyswitneas (dysrhythmias).
  • Diagnostic Clinical Signs:     * shovedex sign: Performed by tapping the cheek, which results in a partial facial twitch.     * Tusa sign: Observed when applying a blood pressure cuff; it leads to "cough and flakes" and hand spams (spasms).
  • Electrocardiogram (ECG) Changes: A significant finding on an ECG for hypocalcemia is a longe (long) QT interval.
  • Nursing Interventions for Low Calcium:     * Administration of calcium supplements.     * Implementation of seizure precautions.     * Constant monitoring of the patient's airway.     * Continuous monitoring of the ECG.
  • High-Calcium Dietary Sources:     * Milk.     * Cheese.     * Yogurt.     * Green vegetables.

Hypercalcemia

  • Definition: Hypercalcemia (hyperglycemia was mentioned, but hypercalcemia is the subject) is defined as a calcium level above 10.510.5.
  • Pathophysiology: In states of high calcium, everything in the body becomes "low and slow." Excess calcium acts to slow down the nerves and muscle functions.
  • Causes of Hypercalcemia:     * Hyperparathyroidism.     * Cancer.     * Excessive intake of calcium.     * Excessive intake of Vitamin D.     * Prolonged periods of immobility.
  • Symptoms and Clinical Presentation:     * Weak muscles.     * Decreased reflexes.     * General fatigue.
  • Gastrointestinal (GI) Signs:     * Constipation.     * Nausea.
  • Renal and Cardiac Signs:     * Development of kidney stones.     * Heart dyslipneias (dysrhythmias).
  • Electrocardiogram (ECG) Changes: A characteristic finding for hypercalcemia is a shortness (shortened) QT interval.
  • Nursing Interventions for High Calcium:     * Increase fluid intake.     * Promote coherence mobility (encourage mobility).     * Monitor heart activity.     * Administer diuretics as ordered.

Memory Aids and Summary

  • Easy mammary trick for Hypocalcemia:     * Low calcium equals an over-excited nerve system.     * Watch for twitching, hyperactive reflexes, and tetani.     * Positive shovedex and Tusa (juzo) signs.
  • Easy mammary trick for Hypercalcemia:     * High calcium slows the body down.     * Watch for physical weakness, decreased reflexes, constipation, and the formation of kidney stones.
  • Key Distinction Summary:     * Hypocalcemia: Low calcium makes the nerves overexcited.     * Hypercalcemia: High calcium slows everything down.