A nurse preparing to start a blood transfusion will use which type of tubing?
An air vent to let bubbles into the blood
One with a filter to ensure that clots do not enter the patient
An injection port to mix additional electrolytes into the blood
Two-way valves to allow the patient's blood to mix and warm the blood transfusing
The Correct Answer is B
A. An air vent allowing bubbles into the blood would be unsafe and can cause air embolism, so this option is incorrect.
B. Using tubing with a filter is standard practice for blood transfusions to prevent clots and debris from entering the patient’s bloodstream, making this the correct choice.
C. Mixing additional electrolytes into the blood is not a standard practice during transfusions, as it can cause complications; thus, this option is not appropriate.
D. Two-way valves are not typically used in blood transfusion setups; the goal is to keep the blood product separate from other fluids unless specifically indicated.
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Correct Answer is D
Explanation
A. An increase in heart rate does not directly affect hemoglobin levels; this option is incorrect.
B. A higher heart rate decreases diastolic filling time, as there is less time for the heart to fill between beats, which can lead to reduced stroke volume.
C. An increased heart rate does not inherently increase stroke volume; in fact, at very high rates, stroke volume can decrease due to reduced filling time.
D. The significant increase in heart rate to 164 beats/min can lead to decreased cardiac output due to compromised diastolic filling and reduced stroke volume.
Correct Answer is C
Explanation
A. Atelectasis can occur in anyone, not just those with chronic conditions; this statement is incorrect.
B. While hyperventilation may temporarily open alveoli, it is not a preventative measure for atelectasis.
C. Breathing exercises, such as incentive spirometry or deep breathing, are effective in preventing atelectasis by promoting lung expansion and alveolar ventilation.
D. A chest tube is typically used to remove air or fluid from the pleural space, not for the treatment of atelectasis, which is often managed with respiratory therapies.