Gettler’s test is used to diagnose death due to: Delhi 06; NEET 14
**Core Concept**
Gettler's test is a chemical test used to differentiate between death due to drowning in saltwater and freshwater. It measures the chloride ion concentration in the blood and cerebrospinal fluid (CSF) to determine the cause of death.
**Why the Correct Answer is Right**
The test relies on the principle that chloride ions tend to move from areas of high concentration (such as seawater) to areas of low concentration (such as blood and CSF) in the body. When a person dies from drowning in saltwater, the chloride ions from the water enter the body and accumulate in the blood and CSF, resulting in a higher chloride ion concentration. This is in contrast to death due to freshwater drowning, where the chloride ions are diluted. Gettler's test measures the chloride ion concentration in the blood and CSF to determine whether the death was due to saltwater or freshwater drowning.
**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because Gettler's test is specifically designed to differentiate between saltwater and freshwater drowning, not other causes of death.
* **Option B:** This option is incorrect because Gettler's test does not measure the chloride ion concentration in the lungs, but rather in the blood and CSF.
* **Option C:** This option is incorrect because Gettler's test is not used to diagnose death due to carbon monoxide poisoning or other causes of asphyxiation.
**Clinical Pearl / High-Yield Fact**
Gettler's test is an important diagnostic tool in cases of suspected drowning, but it should be interpreted in conjunction with other clinical findings and autopsy results. It is also essential to note that Gettler's test is not foolproof and can be influenced by various factors, such as the time elapsed since death and the presence of other medical conditions.
**Correct Answer:** D.