Question

Which postmortem parameter is fixed by 8 hours?

Answer 1

Rigor mortis is the postmortem parameter that typically becomes fixed by 8 hours after death and is used in forensic medicine to help estimate the time of death.

Step-by-step explanation:

The postmortem parameter that typically becomes fixed by 8 hours after death is rigor mortis, which refers to the stiffening of the muscles due to biochemical changes that occur in the body post-death. This process begins within 2-6 hours after death, usually starting at the head and neck and moving down to the lower limbs, and is fully developed by approximately 8-12 hours, depending on a variety of factors such as the environment and the individual's muscle mass. It is an important consideration in forensic medicine and pathology as it can help estimate the time of death.

Answer 2

Algor mortis is the change which is an immediately sign of death. It involves the cooling of body. The body temperature decreases as the body after death looses the control over the circulation and exchange of gases and the control over the homeostasis. The temperature decreases until the body attains equilibrium with the external environmental temperature. The postmortem cooling or algor mortis gets fixed by 8- 10 hours after death. The temperature of the body after death can be used to determine the time since death. This can be measured by determining the temperature of the rectum which is proved to be most accurate or any other orifice such as nasal, ear and vaginal can also be used.