**Question:** Which of the following are signs of antemortem drowning

A. Cyanosis
B. Respiratory distress
C. Submersion injury
D. Pulse oximetry

**Core Concept:** Antemortem drowning refers to a situation where a person is submerged in water and experiences respiratory and circulatory compromise due to the lack of oxygen and carbon dioxide exchange. This can lead to specific clinical signs that are indicative of drowning.

**Why the Correct Answer is Right:**

Correct Answer: **C. Submersion injury**

Submersion injury is a sign of antemortem drowning as it refers to the physical trauma caused by being submerged in water, which could include skin abrasions, lacerations, or contusions. These injuries are often seen in cases of drowning due to the force exerted by the water and the body's reaction to the submersion.

**Why Each Wrong Option is Incorrect:**

Option A (Cyanosis): Cyanosis is a sign of hypoxia, not drowning. It refers to the bluish discoloration of the skin and mucous membranes due to decreased oxygenation. In drowning, cyanosis would not be present initially as the body compensates for the lack of oxygen by increasing blood flow to the skin, causing pallor.

Option B (Respiratory distress): Respiratory distress is a general term for difficulty breathing and is not specific to drowning. It may present in various clinical conditions, making it an unreliable indicator of drowning alone.

Option D (Pulse oximetry): Pulse oximetry is a monitoring tool that measures the oxygen saturation of the blood. While it cannot definitively confirm drowning, it is not a reliable sign of antemortem drowning.

**Clinical Pearl:** In antemortem drowning cases, the clinical signs to look for are submersion injury (C), respiratory distress (not specific), and cyanosis (not present initially). Pulse oximetry is not specific to drowning.