Algor mortis (post-mortem cooling) follows which pattern in relation to ambient temperature, and at what rate does the body temperature typically fall?

Question

Accepted Answer

C. Body temperature falls at approximately 1–1.5°C per hour until it equilibrates with ambient temperature. ## Algor Mortis: Post-Mortem Cooling

**Key Point:** Algor mortis is the gradual loss of body heat after death. The body cools from normal temperature (37°C / 98.6°F) towards ambient temperature at a predictable rate.

### Cooling Rate & Factors

**High-Yield:** The standard cooling rate is **1–1.5°C per hour** (or ~2–2.7°F per hour) under normal conditions, until the body temperature equilibrates with the environment.

| Factor | Effect on Cooling Rate |
|--------|------------------------|
| Ambient temperature (cold) | Accelerates cooling |
| Ambient temperature (warm) | Slows cooling |
| Body mass (obese) | Slows cooling |
| Body mass (lean) | Accelerates cooling |
| Clothing / bedding | Slows cooling |
| Fever at time of death | Extends cooling time |
| Immersion in water | Accelerates cooling (25× faster) |

**Clinical Pearl:** Algor mortis is **not reliable** for precise time-of-death estimation because ambient temperature, body composition, and clothing significantly alter the rate. It is most useful as a **rough indicator** (e.g. a body still warm suggests death within a few hours).

**Mnemonic:** **1-1.5°C/hr** — Remember this as the standard cooling rate; then adjust mentally for ambient conditions.

Answer

A. Body temperature falls at approximately 2–3°C per hour regardless of ambient temperature

Answer

B. Body temperature falls at approximately 1–1.5°F per hour until it equilibrates with ambient temperature

Answer

D. Body temperature rises initially for 2–3 hours then falls at 0.5°C per hour

Algor mortis (post-mortem cooling) follows which pattern in relation to ambient temperature, and at what rate does the body temperature typically fall?

Explanation

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