The discolouration that appears in the dependent areas of the body after death is called?

Appeared in: AIIMS Patna NO - 2020

Explanation

Livor mortis is the correct medical term for the postmortem discoloration caused by the gravitational pooling of blood in the body's dependent parts.
This process, also known as postmortem lividity or hypostasis, results in a purplish-red appearance of the skin.
It begins within 30 minutes to 2 hours after death and becomes fixed, meaning it won't blanch with pressure, after about 8-12 hours.
The image provided shows a classic example of livor mortis on the posterior aspect of the body.

Option A: Rigor mortis refers to the stiffening of muscles and joints after death, not discoloration. It is a result of chemical changes in the muscle fibers.
Option C: Algor mortis describes the process of the body cooling down to the ambient temperature after death. It does not involve any change in skin color.
Option D: 'Stiff mortis' is not a recognized medical or forensic term. It is likely a distractor created by combining the concept of 'stiffness' from rigor mortis with the word 'mortis'.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Postmortem Changes as background academic context rather than a clinical decision trigger.
Nurses, particularly in emergency, palliative, and critical care settings, must accurately identify and document postmortem changes as part of providing respectful postmortem care.
Understanding the stages of death helps the nurse provide clear and compassionate information to the deceased's family.
In forensic nursing, these signs are fundamental for estimating the time of death (postmortem interval), which can be crucial in legal investigations.

How to Approach the Question

First, identify the key concept in the question stem, which is 'discolouration' in 'dependent areas' after death.
Next, analyze the provided options, which are all terms related to postmortem changes.
Recall the definitions for each term: 'Algor' relates to temperature, 'Rigor' relates to stiffness/rigidity, and 'Livor' relates to a bluish color or lividity.
Match the key concept 'discolouration' with the corresponding term. Livor mortis is the only option that describes a change in color.
Eliminate 'Stiff mortis' as it is not a standard medical term.
Confirm your choice by relating it to the underlying physiological process: gravity pulling blood down to create the discoloration.

Concept Tested & Keywords

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E6 Nursing Fundamentals Taylor pp. 946-948, 951-953

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