A client with acute respiratory distress syndrome (ARDS) shows no improvement despite increases in concentration in oxygen administered. What intervention should the nurse attempt which may improve ventilation-perfusion matching?

D. A drop in oxygen saturation may indicate inadequate oxygenation, which could be due to airway obstruction or retained secretions.

A. While audible expiratory wheezes may indicate airway obstruction or secretions, they do not necessarily indicate the need for suctioning in a patient receiving mechanical ventilation.

B. An elevated respiratory rate may suggest increased work of breathing, which could be due to retained secretions or airway obstruction. However, an elevated respiratory rate alone may not always indicate the need for suctioning.

C. The timing of the last suctioning episode is an important consideration when determining the need for suctioning. However, it should not be the sole indicator for when to suction.

B This maneuver, called the Valsalva maneuver, can sometimes help to restore normal heart rhythm in cases of SVT. It involves blowing forcefully into a syringe or performing a similar action that increases intra-abdominal pressure, which can stimulate the vagus nerve and help to slow down the heart rate.

A Defibrillation is a treatment used for life-threatening cardiac arrhythmias, particularly ventricular fibrillation or pulseless ventricular tachycardia. It involves delivering a therapeutic dose of electrical energy to the heart with a device called a defibrillator.

C Drawing troponin levels may be appropriate if there is suspicion of myocardial infarction as the cause of chest palpitations or if there are other symptoms suggestive of acute coronary syndrome. However, in the context of SVT presenting with chest palpitations and a racing heart, the priority is to address the arrhythmia first

D Amiodarone is an antiarrhythmic medication used to treat various types of cardiac arrhythmias, including ventricular and supraventricular arrhythmias. While it can be effective in certain cases of SVT, it is not typically the first-line treatment or the immediate next step in managing SVT in the emergency department.