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.
1 Paroxysmal nocturnal dyspnea (PND) is severe shortness of breath while sleeping requiring the patient to rise up and seek more air as by opening a window. 2  It is seen in patients with left heart failure. 3  Platypnea is difficulty in breathing in the upright position, which improves when the patient lies down.