Truck Driving School Costs. The average length of PTDI-certified courses is four to six weeks, though courses may be as short as two weeks or as long as 12 weeks or more. The average cost of PTDI-certified courses is about $4,200, though the cost of truck driving school may be as low as $1,500 and as high as $10,000.
Orthopnea is the opposite of platypnea, shortness of breath that worsens when sitting or standing up.
Mixed apnea. â¢ A of the event, followed by a gradual increase in effort which eventually breaks the apnea. Hypopnea: â¢ Partial airway collapse causing shallow breathing (airflow reduced by at least 30-50%) during sleep, lasting 10 seconds or longer, usually associated with a fall in blood oxygen saturation.