Blackened, decomposing tissue that is devoid of blood circulation is known as

UPPSC 2017

Medical & Surgical Nursing

Easy

Appeared in: UPPSC 2017

Explanation

Gangrene is the medical term for tissue death (necrosis) that occurs when a part of the body loses its blood supply.
This lack of blood flow (ischemia) deprives the tissue of oxygen and nutrients, causing it to die and decompose.
The breakdown of red blood cells in the necrotic tissue releases iron sulfide, which gives the tissue its characteristic black color.
The process often involves putrefaction due to bacterial overgrowth, especially in wet gangrene.

Option A: Contraction is the physiological process of muscle shortening or tissue tightening. It does not involve tissue death or decomposition.
Option B: Atrophy is the decrease in size or wasting away of body tissue. While it can result from poor circulation, it does not describe the blackened, decomposing state of gangrene.
Option D: Erythema is redness of the skin caused by increased blood flow (hyperemia). This is the opposite of the condition described, which is a lack of blood circulation.

Clinical Relevance

Nursing practice connection: Knowing Tissue Necrosis and Gangrene helps nurses interpret findings accurately and avoid errors in routine assessment, medication administration, and patient teaching.
Early recognition of ischemia is critical to prevent gangrene. Nurses use the '6 Ps' to assess for acute limb ischemia: Pain, Pallor (paleness), Pulselessness, Paresthesia (numbness/tingling), Paralysis, and Poikilothermia (coldness).
Patients with diabetes, peripheral artery disease (PAD), and severe injuries are at high risk for developing gangrene. Meticulous foot care and blood sugar control are vital preventive measures for diabetic patients.
What if? If the tissue was red, swollen, and warm to the touch, the correct term would be cellulitis or erythema, indicating inflammation and increased blood flow, which requires a different treatment approach (antibiotics) compared to gangrene (debridement, revascularization, or amputation).

How to Approach the Question

First, break down the question stem to identify the key descriptors: 'blackened', 'decomposing', and 'devoid of blood circulation'.
Next, evaluate each option against these key descriptors.
Recall the definition of 'Contraction' (muscle shortening) and 'Atrophy' (tissue wasting) and rule them out as they don't match 'blackened' or 'decomposing'.
Consider 'Erythema'. Recall that this means redness due to increased blood flow, which is the opposite of 'devoid of blood circulation'. Rule it out.
Finally, confirm that 'Gangrene' is the precise medical term for tissue death and decomposition resulting from a lack of blood supply, which perfectly matches all the descriptors in the question.

Concept Tested & Keywords

Concept Tested: Tissue Necrosis and Gangrene
Stem keywords: blackened tissue, decomposing tissue, devoid of blood circulation
Lead-in keywords: is known as

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