BLS Algorithm Flashcard 1
Rationale
D. Rationale: Chest compression rate must be between 100 and 120 per minute. A higher chance of survival is associated with chest compressions at this rate. (BLS Assessment: Do’s and Don’ts of High-Quality CPR)
Question
Your team leader wants you to increase the chest compression rate while performing high-quality CPR to a cardiac arrest patient. The recommended chest compression rate is between:
a. 60 and 90 compressions per minute
b. 80 and 90 compressions per minute
c. 90 and 110 compressions per minute
d. 100 and 120 compressions per minute
Answer
d. 100 and 120 compressions per minute
Rationale
C. Rationale: Chest compression depth between 2 and 2.4 inches is associated with improved outcomes. (BLS Assessment: Do’s and Don’ts of High-Quality CPR)
Question
The recommended depth of each chest compression in adult high-quality CPR is:
a. 1 to 1.5 inches
b. 1.4 to 2 inches
c. 2 to 2.4 inches
d. At least 3 inches
Answer
c. 2 to 2.4 inches
Rationale
D. Rationale: For adults, the recommended compression-to-ventilation ratio in CPR is 30:2. (BLS Assessment: Do’s and Don’ts of High-Quality CPR)
Question
You are performing single rescuer CPR for an out-of-hospital cardiac arrest patient with an acute myocardial infarction. The recommended ratio of chest compressions-to-ventilations is:
a. 2:1
b 10:1
c. 15:2
d. 30:2
Answer
d. 30:2
Rationale
D. Rationale: High-quality CPR involves adequate chest compression depth and rate, allowing full chest recoil after each compression, minimizing interruptions, and avoiding excessive ventilation. (BLS Assessment: Do’s and Don’ts of High-Quality CPR)
Question
Which of the following is a component of high-quality CPR?
a. Compression rate of > 120 per minute
b. Ventilating as fast as possible
c. Compressions at a depth of 1 to 1.5 inches
d. Allowing full chest recoil after each compression
Answer
d. Allowing full chest recoil after each compression
Rationale
D. Rationale: Inadequate compression depth increased to 70% when rescuers performed compressions at a rate of > 140/min.
Question
70% of rescuers provide inadequate compression depth at a compression rate of:
a. 100 compressions per minute
b. 120 compressions per minute
c. 130 compressions per minute
d. 140 compressions per minute
Answer
d. 140 compressions per minute
Rationale
C. Rationale: A switch between two rescuers performing chest compressions must be done in under 5 seconds.
Question
A switch between two rescuers performing chest compressions must be done in under how many seconds?
a. 2 seconds
b. 3 seconds
c. 5 seconds
d. 10 seconds
Answer
c. 5 seconds
Rationale
D. Rationale: Chest compressions should not be interrupted for ventilations if an advanced airway is in place.
Question
A team member should:
a. Minimize interruptions in the delivery of chest compressions
b. Interrupt chest compressions only for ventilation with an advanced airway in place
c. Interrupt chest compressions only for delivery of a shock
d. A and C
e. All of the above
Answer
d. A and C
Rationale
B. Rationale: The responder should recheck the patient’s pulse every 2 minutes, taking at least 5 seconds but no longer than 10 seconds to complete the pulse check.
Question
Avoiding interruptions in chest compressions is one of the key components of high-quality CPR. When rechecking for a pulse, the BLS provider must take no longer than:
a. 6 seconds
b. 10 seconds
c. 20 seconds
d. 30 seconds
Answer
b. 10 seconds
Rationale
B. Rationale: Chest compression rate should be 100–120/min. These chest compression rates have been associated with improved survival.
Question
Chest compression rate should be:
a. 90–100 per minute
b. 100–120 per minute
c. 120–140 per minute
d. 80–100 per minute
Answer
b. 100–120 per minute
Rationale
A. Rationale: Myocardial blood flow is made possible by a pressure gradient toward the myocardial vascular bed. The higher aortic pressure during diastole pushes the blood flow towards the coronary arteries if the left ventricular pressure is lower (again, during diastole).
Question
Coronary perfusion pressure measures myocardial blood flow, which is the goal when performing cardiopulmonary resuscitation. How is coronary perfusion pressure calculated?
a. Aortic pressure during diastole minus ventricular pressure during diastole
b. Pulmonary artery pressure during diastole minus left atrial pressure during diastole
c. Superior vena caval pressure during diastole minus right atrial pressure during diastole
d. Left atrial pressure during systole minus left ventricular pressure during systole
Answer
a. Aortic pressure during diastole minus ventricular pressure during diastole