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
ANS: B
Total cycle time (TCT) = 60/frequency = 60/20 = 3 seconds. (P-macron)aw = [(PIP − PEEP) ? (TI/TCT)] + PEEP = [(27 − 5) ? (0.75/3)] + 5 = (22 ? 0.25) + 5 = 7.75 cm H2O.
You might also like to view...
Which type of muscle tissue is found in the forearm?
A) Voluntary B) Involuntary C) Integumentary D) Contraction
Which of the following bacteria is a gram-negative facultative rod?
A) Streptococcus sanguis B) Porphyromonas gingivalis C) Aggregator actinomycetemcomitans D) Tannerella forythensis
Using an ICD-9-CM code book, select the appropriate code(s) for the diagnostic statements given in the following questions
Effusion of ankle and foot joint
Choose the best match for each item. Use an answer only once.
A. tissue thromboplastin B. moving wire probes C. INR D. Xa E. Coumadin F. POCT G. named the prothrombin time test H. CoaguChek S