Positive pressure ventilation is a technique used in respiratory therapy to help individuals breathe more effectively. This method involves delivering air or oxygen into the lungs at a higher pressure than atmospheric pressure, which helps to open up the airways and improve oxygenation. Positive pressure ventilation can be delivered through various methods, including mechanical ventilators, BiPAP machines, and CPAP machines. This technique is commonly used in medical settings to treat conditions such as acute respiratory failure, obstructive sleep apnea, and respiratory distress syndrome. Positive pressure ventilation can be life-saving in cases where a person is unable to breathe on their own or is experiencing difficulty breathing.