An inspiratory muscle trainer uses which of the following to vary inspiratory pressures?

An inspiratory muscle trainer uses which of the following to vary inspiratory pressures?
 A) adjusting magnetic attraction against a diaphragm
  B) changing the size of an orifice
  C) adjusting pressure on a single-stage reducing valve
  D) changing the position of a needle valve

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Q. 2  Risk factors for necrotizing enterocolitis (NEC) include
 A) overfeeding
  B) formula feeding
  C) hyperbilirubinemia
  D) breast feeding

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Q. 3  Which of the following devices are similar in the way pressure is delivered?
  I. Mercury Medical, Inc, Resistex PEP valve
  II. DHD Healthcare, Inc, Acapella
  III. Flutter valve
  IV. DHD Healthcare, Inc, Coach
 A) I and III
  B) I and IV
  C) II and III
  D) II and IV

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Q. 4  Administration of an antacid containing magnesium to a neonate can result in
 A) hypomagnesemia
  B) hypotonia
  C) hyponatremia
  D) hyperkalemia

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Q. 5  What should you instruct the patient to do following 10 to 20 breaths when using a positive expiratory pressure (PEP) therapy device?
 A) rest before the next repetition of breaths
  B) take in a deep breath and hold it
  C) sit down
  D) cough