Travell and Simons describe ___ factors that contribute to the formation and perpetuation of trigger points

Which of these is not a shadow-casting principle?

A) A large focal spot B) Long target—image receptor distance C) Short object—image receptor distance D) Parallel object—image receptor relationship

A patient-ventilator system check reveals the following information: peak inspiratory pressure (PIP) 27 cm H2O, positive end-expiratory pressure (PEEP) 5 cm H2O, plateau pressure (Pplateau) 14 cm H2O,

inspiratory time (TI) 0.75 second, and set frequency 20/minute. Calculate the mean airway pres-sure. a. 6.75 cm H2O b. 7.75 cm H2O c. 11.75 cm H2O d. 12.37 cm H2O