Question 1: During autopsy of a fetal death case, what is the correct order of examination to differentiate between live birth and stillbirth?
- A. Thorax > head > abdomen
- B. Abdomen > thorax > head
- C. Thorax > abdomen > head
- D. Head > thorax > abdomen (Correct Answer)
Explanation: ### Explanation: Order of Fetal Autopsy
The correct sequence for a fetal autopsy to determine live birth is **Head > Thorax > Abdomen**.
#### 1. Why "Head First"?
The primary goal in determining live birth is to assess the **Hydrostatic (Raygat’s) Test** and the **Stomach-Bowel (Breslau’s) Test**.
* If the **thorax** or **abdomen** is opened first, blood from the large vessels (like the superior vena cava or portal vein) can drain downwards due to gravity.
* Opening the **head first** allows the blood to drain from the cranial sinuses, effectively **decongesting the thoracic and abdominal organs**. This prevents artificial congestion and ensures that when the lungs and intestines are later tested for air, the results are not confounded by excessive blood volume or accidental trauma to the diaphragm.
#### 2. Analysis of Incorrect Options
* **Thorax > Head > Abdomen (A & C):** Opening the thorax first is the standard procedure in adult autopsies but is avoided in fetuses. Manipulating the chest before the head can cause blood to pool in the thoracic cavity, potentially obscuring signs of respiration or causing artifacts in the hydrostatic test.
* **Abdomen > Thorax > Head (B):** While the abdomen contains the stomach (Breslau’s test), opening it first does not provide the necessary decompression of the venous system that the cranial opening provides.
#### 3. High-Yield Clinical Pearls for INI-CET
* **Hydrostatic Test:** Based on the principle that lungs that have breathed will float in water. **False positives** occur in putrefaction (gas formation); **False negatives** occur in secondary atelectasis or pneumonia.
* **Wredin’s Test:** Presence of air in the **middle ear** indicates the infant lived long enough to perform swallowing/breathing actions.
* **Breslau’s Second Life Test:** If the stomach and intestines float, it indicates the child survived long enough to swallow air.
* **Spalding’s Sign:** An X-ray finding in *intrauterine* death showing overlapping of cranial bones due to liquefaction of the brain (occurs 4–7 days after death).