A nurse assesses a client after administering a prescribed beta blocker. Which assessment should the ...

The answer to question 1

ANS: D
Beta blockers block the stimulation of beta1-adrenergic receptors. They block the sympathetic (fight-or-flight) response and decrease the heart rate (HR). The beta blocker will decrease HR and blood pressure, increasing ventricular filling time. It usually does not have effects on beta2-adrenergic receptor sites. Cardiac output will drop because of decreased HR.

The answer to question 2

ANS: A
When a client experiences hypotension, baroreceptors in the aortic arch sense a pressure decrease in the vessels. The parasympathetic system responds by lessening the inhibitory effect on the sinoatrial node. This results in an increase in heart rate and respiratory rate. This tachycardia is an early response and is seen even when blood pressure is not critically low. An increased heart rate and respiratory rate will compensate for the low blood pressure and maintain oxygen saturations and perfusion. The client may not be able to compensate for long, and decreased oxygenation and cool, clammy skin will occur later.

The answer to question 3

ANS:
660 mL
A low tidal volume of 6 mL/kg is used to prevent lung injury.
242 pounds = 110 kg.
110 kg  6 mL/kg = 660 mL.