SODIUM

Electrolytes

Substances whose molecules dissociate into ions when placed in water.

Osmotically Active Particles

Substances that influence the movement of water in and out of cells.

Sodium (Na)

The major cation of extracellular fluid, most abundant extracellular cation.

Potassium (K)

An essential electrolyte that helps maintain proper cell function.

Chloride (Cl)

An electrolyte that helps maintain fluid balance and osmotic pressure.

Bicarbonate (HCO3-)

An ion that helps maintain pH balance in the body.

General Dietary Requirements for Electrolytes

Most electrolytes need to be consumed in small amounts; excessive intake leads to increased excretion via kidneys.

Na-K ATP-ase Pump

A pump that moves sodium out and potassium into cells to maintain cellular function.

Aldosterone

A hormone that regulates sodium reabsorption in the kidneys.

Hyponatremia

A condition characterized by low sodium levels in the blood.

Hypernatremia

A condition characterized by high sodium levels in the blood.

Clinical Symptoms of Hyponatremia

Symptoms may include nausea, vomiting, headache, seizures, and coma.

Clinical Symptoms of Hypernatremia

Symptoms may include altered mental status, lethargy, irritability, nausea, and vomiting.

Serum Sodium Reference Range

136-145 mEq/L or mmol/L.

Urine Sodium Reference Range

40-220 mEq/L in a 24-hour collection.

Dilution Factor in Sodium Testing

Urine specimen dilution is often required for accurate sodium level measurement.

Methods for Sodium Determination

Includes Emission Flame Photometry, Atomic Absorption Spectrophotometry, and Ion Selective Electrode.

Flame Emission Spectrophotometry (FES)

A method measuring the light emitted by sodium when excited by heat.

Atomic Absorption Spectrophotometry (AAS)

A method determining sodium concentration by light absorption.

Ion Selective Electrode

A device that allows selective measurement of specific ions in a solution.

Symptoms of Sodium Imbalance

Can significantly impact central nervous system and other bodily functions.

Renal Regulation of Sodium

The kidneys can conserve or excrete sodium based on blood volume and osmotic pressure.

Cation

Positively charged ion, important in physiological processes.

Anion

Negatively charged ion, important in maintaining charge balance in the body.

Extracellular Fluid

Fluid outside of cells, concentrated with sodium ions.

Intracellular Fluid

Fluid within cells, concentrated with potassium ions.

Plasma Osmolality

Measure of solute concentration in plasma, influenced by sodium levels.

Hyperlipidemia

High levels of lipids in the blood, which may affect sodium measurement.

Hypoadrenalism

Adrenal insufficiency that can lead to decreased aldosterone and sodium loss.

Diabetes Insipidus

Condition that causes excessive urination and can lead to hypernatremia.

Nephrotic Syndrome

Kidney disorder causing large amounts of protein loss and edema.

Hepatic Cirrhosis

Liver disease that affects fluid balance and may lead to hyponatremia.

Congestive Heart Failure

A condition that can cause fluid retention and changes in sodium balance.

Gastrointestinal Losses

Loss of sodium due to vomiting or diarrhea.

Sweating as a Cause of Sodium Loss

Excessive sweating can lead to loss of sodium and other electrolytes.

Water Balance

The balance of water intake and excretion which affects sodium levels.

Correction of Electrolyte Imbalance

May require intravenous fluids or oral rehydration solutions.

Pedialyte

A rehydration solution often given to children to replace lost electrolytes.

Intravenous Replacement Therapy

Therapy used to replace lost fluids and electrolytes in a clinical setting.

Dehydration Effects

Can manifest as dry mouth, fatigue, dizziness, and confusion.

Fluid Overload

Excessive fluid in the body, often seen in conditions like heart failure.

IV Therapy

A method for delivering fluids and necessary electrolytes directly into the bloodstream.

Respiratory Acidosis

A condition that can lead to renal compensation mechanisms affecting sodium.