Salbutamol Mechanism in Hyperkalemia
Nebulized salbutamol is primarily used to manage hyperkalemia, a condition characterized by elevated serum potassium levels.
Its mechanism involves the activation of beta-2 adrenergic receptors, which stimulates the sodium-potassium ATPase (Na+/K+-ATPase) pump located on cell membranes. This stimulation enhances the movement of potassium ions (K+) from the extracellular fluid into the intracellular fluid.
- Action: Beta-2 agonism stimulates the Na+/K+-ATPase pump.
- Effect: Facilitates intracellular shift of potassium (K+).
- Result: Decreases serum potassium concentration.
This acute reduction in serum K+ makes salbutamol a valuable tool in the emergency management of hyperkalemia.
Important Questions from Electrolyte Imbalance
- A patient presents with history of 'bones, stones and abdominal groans' – due to generalised aches and pains and renal calculus colic. Which is the most discriminatory blood investigation?
- Which one of the following is the most appropriate initial treatment for management of severe hypercalcemia ?
Which of the following are used in calculating the serum osmolality?
1. Serum sodium
2. Glucose
3. Calcium
4. Blood urea nitrogen
Select the correct answer using the code given below:
Which of the following are used in the management of hyperkalemia?
1. 10% calcium gluconate intravenously
2. Regular insulin and intravenous glucose
3. Nebulized ipratropium bromide
4. Intravenous sodium bicarbonate
Select the correct answer using the code given below:
Which of the following are adverse effects of loop-acting and thiazide diuretics?
1. Metabolic acidosis
2. Hypovolemia
3. Hyponatremia
4. Hypokalaemia
Select the correct answer using the code given below.
