HealthMap

Barium Toxicity and Respiratory Muscle Paralysis

• Direct Answer: Yes, acute barium toxicity can indeed cause flaccid paralysis of skeletal muscles, including the respiratory muscles.

Mechanism of Action

• Potassium Depletion: Barium poisoning famously causes severe hypokalemia (critically low blood potassium levels) because potassium shifts rapidly from the extracellular fluid into the intracellular space.
• Neuromuscular Blockade: Potassium is essential for maintaining the resting membrane potential of nerve and muscle cells. When potassium plummets, muscle cells become hyperpolarized and unresponsive to electrical stimuli, leading to profound muscle weakness and flaccid paralysis.
• Respiratory Failure: If the paralysis affects the diaphragm and intercostal muscles, it results in respiratory arrest, which is a life-threatening medical emergency requiring immediate intervention.