Which is not a feature of lungs in salt water drowning
**Core Concept**
Lungs in salt water drowning undergo significant changes due to the hypertonic nature of seawater. The high salt concentration in salt water leads to an influx of sodium and water into the lung tissues, causing pulmonary edema and inflammation.
**Why the Correct Answer is Right**
The correct answer is related to the pathophysiology of lung injury in salt water drowning. In salt water drowning, the high salt concentration disrupts the normal balance of fluids and electrolytes in the lungs. This disruption leads to an increase in permeability of the alveolar-capillary membrane, resulting in fluid and protein leakage into the alveoli. The sodium and water influx into the lung tissues causes pulmonary edema, which is a hallmark of salt water drowning.
**Why Each Wrong Option is Incorrect**
**Option A:** Congestion and edema are indeed features of lungs in salt water drowning due to the influx of sodium and water into the lung tissues.
**Option B:** Inflammation is a feature of lungs in salt water drowning due to the release of inflammatory mediators and the influx of neutrophils into the lung tissues.
**Option C:** Hyaline membrane formation is not a feature of lungs in salt water drowning. Hyaline membrane formation is typically seen in cases of fresh water drowning, where the low salt concentration leads to an outpouring of fluid and proteins into the alveoli.
**Clinical Pearl / High-Yield Fact**
In salt water drowning, the lungs may appear congested and edematous, but the airways are typically clear of debris, unlike in fresh water drowning where the airways may be filled with a hyaline membrane.
**Correct Answer: C. Hyaline membrane formation is not a feature of lungs in salt water drowning.**