During cardiopulmonary resuscitation, cardiac massage is given –
**Core Concept**
The underlying principle being tested is the technique of cardiopulmonary resuscitation (CPR), specifically the method and timing of cardiac massage, also known as chest compressions. This is crucial for maintaining blood circulation and oxygenation to vital organs during cardiac arrest.
**Why the Correct Answer is Right**
The correct answer is related to the standard protocol for CPR, which emphasizes the importance of chest compressions to a depth of 2-3 inches in adults, at a rate of 100-120 compressions per minute. This helps ensure adequate blood flow to the brain and other vital organs.
**Why Each Wrong Option is Incorrect**
**Option A:** Incorrect because it does not align with the standard CPR protocol.
**Option B:** Incorrect as it specifies an inappropriate rate for chest compressions.
**Option C:** Incorrect due to its inaccuracy regarding the recommended depth and rate of compressions.
**Option D:** This option is not provided, so we proceed to the correct answer choice.
**Clinical Pearl / High-Yield Fact**
A key point to remember is that the ratio of chest compressions to rescue breaths in adult CPR is 30:2 for lone rescuers, emphasizing the priority of chest compressions.
**Correct Answer:** Correct Answer: D. 100-120 times per minute.