The nurse is attempting to determine the ventricular rate and rhythm of a patient's telemetry strip. What should the nurse examine to determine this part of the analysis?
RR Interval
QT interval
PP interval
PR interval
The Correct Answer is A
A. RR Interval:
The RR interval is the time between two consecutive R waves on an electrocardiogram (ECG) strip. It is primarily used to determine the ventricular rate and rhythm of the heart. A regular RR interval suggests a regular heart rhythm, while irregular intervals may indicate arrhythmias or other cardiac abnormalities. Calculating the RR interval can help determine the heart rate (ventricular rate) by dividing 60 seconds by the RR interval in seconds (e.g., if the RR interval is 0.8 seconds, the heart rate would be approximately 75 beats per minute).
B. QT Interval:
The QT interval represents the time from the start of the Q wave to the end of the T wave on an ECG. It reflects the time it takes for the ventricles to depolarize and repolarize. Prolongation or shortening of the QT interval can indicate certain cardiac conditions or medication effects, including an increased risk of arrhythmias such as torsades de pointes. However, it is not directly used to determine ventricular rate and rhythm as the RR interval is.
C. PP Interval:
The PP interval is the time between two consecutive P waves on an ECG strip. It is primarily used to assess the atrial rate and rhythm. Regular PP intervals indicate a regular atrial rhythm, while irregular intervals may suggest atrial arrhythmias such as atrial fibrillation or atrial flutter. The PP interval is not directly used to determine ventricular rate and rhythm.
D. PR Interval:
The PR interval is the time from the start of the P wave to the start of the QRS complex on an ECG strip. It represents the time it takes for the electrical impulse to travel from the atria to the ventricles. A normal PR interval is typically between 0.12 to 0.20 seconds. Prolongation or shortening of the PR interval can indicate certain cardiac conduction abnormalities.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. When the client states he is ready to start the infusion:
While it's important to consider the client's readiness and cooperation, the timing of the infusion should not solely depend on the client's statement. The priority is to start the infusion promptly after receiving the packed red blood cells (PRBCs) from the blood bank to ensure their safety and effectiveness.
B. As soon as the nurse can prepare the client and the administration set:
This choice is the correct answer. After receiving the unit of PRBCs from the blood bank at 1130, the nurse should begin the infusion as soon as possible after preparing the client (ensuring the correct patient, verifying the blood type compatibility, obtaining informed consent, etc.) and the administration set (priming the IV tubing, checking for any leaks, etc.). Prompt administration helps prevent delays that could compromise the quality of the blood product.
C. 2 hours after obtaining blood from the blood bank:
Waiting for 2 hours before starting the infusion is too long and could exceed the recommended timeframe for administering PRBCs after obtaining them from the blood bank. Delaying the infusion for such an extended period could impact the viability and safety of the blood product.
D. When the client has finished eating lunch:
The timing of the client's meal is not a factor in determining when to start the infusion of PRBCs. While it's generally important for the client to have adequate nutrition and hydration, the priority is to administer the blood product promptly after preparation to ensure its efficacy and safety, rather than waiting for unrelated factors such as meal times.
Correct Answer is ["1712.32"]
Explanation
To calculate the client's total intake for the 8-hour shift, we need to convert all the volumes to milliliters (mL) and then add them together. Here are the given volumes and their conversions:
1,000 mL 0.9% sodium chloride IV (no conversion needed)
One 6-oz cup of coffee:
6 oz * 29.5735 (conversion factor for oz to mL) = approximately 177.44 mL
6 oz of water:
6 oz * 29.5735 = approximately 177.44 mL
One 180-mL bowl of soup (no conversion needed)
3 oz of flavored gelatin:
3 oz * 29.5735 = approximately 88.72 mL
3 oz of ice cream:
3 oz * 29.5735 = approximately 88.72 mL
Now, let's add up all the volumes:
1,000 mL (IV fluid) + 177.44 mL (coffee) + 177.44 mL (water) + 180 mL (soup) + 88.72 mL (gelatin) + 88.72 mL (ice cream) = 1,712.32 mL
Therefore, the nurse should document the client's total intake for the shift as approximately 1,712.32 mL.
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