What are common low-pressure alarm triggers and remedies?

• A. Leaks, disconnections, cuff leaks; remedy by repairing circuit, checking cuff seal, checking humidifier
• B. Obstruction by secretions
• C. Disconnections during vent changes
• D. Kinking tube causing high pressure

Answer: (A)

Low-pressure alarms come on when the delivered airway pressure falls because the circuit integrity is compromised or the seal isn’t holding. The most common culprits are leaks, disconnections, and cuff leaks. If there’s a leak in the circuit or at connections, or if the humidifier or its seal is faulty, air escapes and pressure drops, triggering the alarm. A leak around the endotracheal or tracheostomy tube cuff also lowers delivered pressure because gas leaks around the cuff. The practical remedies focus on restoring a tight, continuous circuit: repair or replace torn or loose tubing and tighten or reconnect all connections; verify the cuff seal by checking cuff pressure and ensuring the cuff is adequately inflated to the recommended range; and inspect the humidifier circuit for leaks or misassembly and correct as needed. Obstruction by secretions tends to raise pressure and trigger a high-pressure alarm, not a low one; while disconnections during vent changes can cause a drop in pressure, the typical, broadly applicable fixes center on repairing the circuit, confirming a proper cuff seal, and ensuring the humidifier isn’t leaking.