All tests are used to detect live bih, except: NEET 14
**Question:** All tests are used to detect live bih, except: NEET 14
**Core Concept:** Biopsy is a procedure to obtain a tissue sample for microscopic examination. In this context, "live bih" refers to a biopsy that is still connected to the body and can maintain its normal physiological functions. Tests for detecting live bih aim to preserve the tissue's integrity and functionality while removing it for analysis.
**Why the Correct Answer is Right:**
The correct answer, **D** (dissection), refers to a method of obtaining tissue samples by manually cutting or slicing the tissue under a microscope. Dissection involves cutting the tissue, which disrupts its normal physiological functions and may lead to necrosis or damage, making it unsuitable for detecting live bih.
**Why Each Wrong Option is Incorrect:**
Option A (immersion) refers to the process of immersing the tissue in a fixative solution to preserve its structure for microscopic examination. This method does not involve cutting the tissue, so it can detect live bih. However, it may not preserve the tissue's normal physiological functions accurately.
Option B (incision and sectioning) involves cutting the tissue to obtain a section for microscopic examination. This method is similar to dissection (option D) and can lead to tissue damage, making it unsuitable for detecting live bih.
Option C (immersion and sectioning) combines immersion and sectioning (option B). Like option B, it involves cutting the tissue, which can cause damage and make it unsuitable for detecting live bih.
**Clinical Pearl:** In clinical practice, various biopsy techniques exist to obtain tissue samples for pathological examination. Detecting live bih requires preserving the tissue's physiological functions, which dissection (option D) fails to achieve. Other options, such as immersion and sectioning (options C and B), also result in tissue damage and are unsuitable for detecting live bih. When performing a biopsy, choosing the appropriate method based on the specific purpose of the examination is crucial to ensure accurate results and avoid tissue damage.