Author Question: Pulsus paradoxus may be seen on intra-arterial blood pressure monitoring when a. there is a ... (Read 80 times)

kellyjaisingh · **on:** Jun 25, 2018

Pulsus paradoxus may be seen on intra-arterial blood pressure monitoring when

a. there is a decrease of more than 10 mm Hg in the arterial waveform before inhalation.
b. there is a single, nonperfused beat.
c. the waveform demonstrates tall, tented T waves.
d. the pulse pressure is greater than 20 mm Hg on exhalation.

Question 2

Which of the following diagnostic criteria is indicative of ARDS?

a. Radiologic evidence of bibasilar atelectasis
b. PaO2/FiO2 ratio less than or equal to 200 mm Hg
c. Pulmonary artery wedge pressure greater than 18 mm Hg
d. Increased static and dynamic compliance

aloop · **Reply #1 on:** Jun 25, 2018

Answer to Question 1

A
Pulsus paradoxus is a decrease of more than 10 mm Hg in the arterial waveform that occurs during inhalation. It is caused by a fall in CO as a result of increased negative intrathoracic pressure during inhalation.

Answer to Question 2

B
The Berlin Definition of ARDS is as follows: timingwithin 1 week of known clinical insult or new or worsening respiratory symptoms; chest imagingbilateral opacities not fully explained by effusions, lobar or lung collapse, or nodules; origin of edemarespiratory failure not fully explained by cardiac failure or fluid overload; need objective assessment to exclude hydrostatic edema if no risk factor present; oxygenationmild (200 mg Hg less than PaO2/FiO2 less than or equal to 300 mm Hg with positive end-respiratory airway pressure (PEEP) or constant positive airway pressure greater than or equal to 5 cm H2O), moderate (100 mg Hg less than PaO2/FiO2 less than or equal to 200 mm Hg with PEEP greater than or equal to 5 cm H2O), or severe (PaO2/FiO2 less than or equal to 100 mm Hg with PEEP greater than or equal to 5 cm H2O). The mortality rate for ARDS is estimated to be 34 to 58.