All of the following are true about ‘secondary apnea’ in a neonate EXCEPT:
**Core Concept**
Secondary apnea in neonates refers to a type of apnea that occurs after the initial apneic event, often in response to the body's compensatory mechanisms to maintain blood pressure and oxygenation. This phenomenon is closely related to the autonomic nervous system's response to stress and hypoxia.
**Why the Correct Answer is Right**
Secondary apnea is often associated with an increase in the parasympathetic tone, which can lead to a decrease in respiratory rate and depth. This is mediated by the release of neurotransmitters such as acetylcholine, which stimulates the parasympathetic nervous system. In neonates, the autonomic nervous system is still maturing, making them more susceptible to fluctuations in respiratory control.
**Why Each Wrong Option is Incorrect**
**Option A:** Incorrect because it is a characteristic feature of secondary apnea. The initial apneic event triggers a cascade of physiological responses that can lead to secondary apnea.
**Option B:** Incorrect because it is a common cause of primary apnea, not secondary apnea. Primary apnea is often related to issues with respiratory control or lung function.
**Option C:** Incorrect because it is a potential consequence of secondary apnea, not a characteristic feature. Secondary apnea can lead to bradycardia and hypotension due to the body's compensatory mechanisms.
**Clinical Pearl / High-Yield Fact**
In neonates, secondary apnea is often a sign of underlying hypoxia or stress, and it can be a precursor to more severe respiratory distress. Early recognition and management of secondary apnea are crucial to prevent long-term neurological damage.
**Correct Answer: B. This is a characteristic feature of primary apnea, not secondary apnea.**