Pulsus paradoxus may be seen on intra-arterial blood pressure ...

[kellyjaisingh]

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]

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.

[kellyjaisingh]

Excellent

[sultansheikh]

TYSM