Bls Exam 4t2y4u

Take the free BLS Pretest provided below in order to prepare you for our official BLS online exam. The practice exam consists of 10 multiple-choice questions that are derived from the BLS provider manual and adhere to the latest AHA and ECC guidelines. Correct answers & explanations will be shown once the practice test is submitted. 1. Signs of airway obstruction include which of the following? Poor air exchange

Inability to speak

High-pitched noise while inhaling

All of the above

Answer Explanation Poor airway exchange results in impaired ventilation and may be a sign of airway obstruction. High pitched noise while inhaling, called stridor, is a sign of upper airway impairment and may represent a partial airway obstruction. Speech requires movement of air across the vocal cords. An airway obstruction will prevent this air movement and therefore speech. All of the above represent signs of possible airway obstruction.

2. The compression to ventilation ratio for the lone rescuer giving R to victims of ANY age is: 15:2

30:2

30:1

10:1

Answer Explanation 10:1 is not a correct compression to ventilation ratio and will result in inadequate perfusion. 30:1 is not a correct ratio and will result in inadequate ventilation. 30:2 is the AHA expert consensus for the correct ratio of compressions to ventilations. 15:2 is not the correct ratio for compressions to ventilations in single rescuer R. 3. In an adult with an advanced airway in place during 2-rescuer R, breaths should be istered how often? Every 10 to 12 seconds ( 5 to 6 breaths per minute)

Every 4 to 5 seconds ( 12 to 15 breaths per minute)

Every 6 to 8 seconds ( 8 to 10 breaths per minute)

Every 2 to 3 seconds ( 20 to 30 breaths per minute)

Answer Explanation Twenty to thirty breaths per minute will result in hyperventilation which impedes return of spontaneous circulation. One breath every 4 to 5 seconds will result in hyperventilation and is faster than the AHA guidelines recommend. One breath every 6 to 8 seconds results in 8 to 10 breaths per minute, and is the correct ventilation rate for an adult victim with an advanced airway. One breath every 10 to 12 seconds is slower than AHA guidelines recommend. 4. The 5 links in the adult Chain of Survival include all of the following EXCEPT: Advanced airway placement

Integrated Post-Cardiac Arrest Care

Rapid Defibrillation

Early R

Answer Explanation Early R provides vital oxygen to the brain and vital organs increasing the likelihood of recovery. Rapid defibrillation increases the chance of effectively restoring a normal heart rhythm. Advanced airway placement is not part of the BLS adult chain of survival. Post cardiac arrest care reduces the possibility of long-term impairment and increases the chance of a victim making a full recovery. 5. The initial Basic Life (BLS) steps for adults are: Assess the victim, activate EMS and get AED, check pulse, start R Assess the victim, start R, give 2 rescue breaths, defibrillate

Assess the victim, give 2 rescue breaths, defibrillate, start R

Check pulse, give rescue breaths, assess the victim, defibrillate

Answer Explanation The 2010 AHA guidelines recommend starting R before initiating rescue breathing. Assessing the victim, activating EMS, rapid use of an AED, checking pulse, and beginning R is the correct sequence of events for BLS. The 2010 AHA guidelines recommend initiating R prior to giving rescue breaths, and this sequence does not activate EMS. This sequence fails to activate EMS. 6. How often should rescuers switch roles when performing 2-rescuer R? After every 5 cycles of R

After every 10 cycles of R

After every 2 cycles of R

After every cycle of R

Answer Explanation

Changing roles after every cycle of R will create too many interruptions and impair successful resuscitation. Changing roles after every 2 cycles of R will create frequent interruptions in perfusion and is not consistent with AHA recommendations. Changing roles after every 5 cycles of R is the currently recommended frequency to promote high quality R. R is physically demanding and waiting to switch roles every 10 cycles will likely fatigue the rescuer performing chest compressions resulting in lower quality R. 7. The proper steps for operating an AED are: Power on the AED, attach electrode pads, shock the patient, analyze the rhythm Check pulse, attach electrode pads, analyze rhythm, shock patient

Power on the AED, attach electode pads, analyze the rhythm, clear the patient, deliver shock Attach electrode pads, check pulse, shock patient, analyze rhythm

Answer Explanation The patient must be analyzed before the AED will advise a shock

This represents the correct steps for operating an AED. The rhythm must be analyzed before the AED will advise a shock. A pulse check should have been done prior to attaching the AED and is not part of AED operation. This sequence does not begin with powering on the AED. 8. The 2010 AHA Guidelines for R recommended BLS sequence of steps are: Chest compressions, Airway, Breathing

None of the above

Airway, Breathing, Check Pulse

Airway, Breathing, Chest Compressions

Answer Explanation The 2010 guidelines recommend beginning with chest compressions to perfuse the brain, heart and other organs as soon as possible. The AHA no longer recommends beginning with “Airway” as it delays initiation of chest compressions. The AHA changed from “A, B, C” to “C, A, B” in 2010 to emphasize the importance of early chest compressions in successful resuscitation.

None of the above is incorrect. 9. Where should you attempt to perform a pulse check in a child from 1 year of age to puberty? Brachial artery

Carotid or Femoral artery

Temporal artery

Ulnar artery

Answer Explanation The brachial artery located on the upper arm is used in infants below 1 year old. The ulnar artery is not used to perform pulse checks in BLS. The temporal artery is not used to perform pulse checks in BLS. The carotid and femoral arteries are used to perform pulse checks in BLS on children from 1 year of age to puberty. 10. The critical characteristics of high-quality R include which of the following? Minimize interruptions

Push hard and fast

All of the above

Starting chest compressions within 10 seconds of recognition of cardiac arrest Answer Explanation Minimizing interruption of circulation by quickly recognizing cardiac arrest and beginning R is an important characteristic of high-quality R and is emphasized by the AHA guidelines. Pushing hard enough to compress the heart and squeeze blood out, and fast enough to raise blood pressure is a vital characteristic of highquality R and is emphasized in the 2010 AHA guidelines. Minimizing interruptions in R keeps blood pressure high enough to perfuse vital organs including the heart and brain and is critical to improving outcomes in cardiac arrest.