How long does the pupil dilate after death?

summary

Mydriasis, which proved to be one of the manifestations of brain death, mydriasis, the disappearance of light reflection, after death, mydriasis fixed, often used as an important test content to judge death, specifically, it means that the pupil diameter is more than five mm, with a flashlight light on the eyes, the pupil size will not change. How long does the pupil dilate after death? Next, I'd like to share my views with you.

How long does the pupil dilate after death?

In some clinical cases, the pupil begins to dilate before the person is completely dead. For example, the patient is seriously poisoned, or is in a severe coma, or is close to brain death and enters a vegetative state. At this time, the infrastructure that controls the pupil begins to relax, and the pupil will gradually dilate

At the same time, not all death, will occur pupil dilation, in some cases, such as morphine or heroin overdose poisoning, will also appear needle like pupil, after death, pupil is usually a state of narrowing. In short, in practice, pupil size is a routine measurement.

If the pupil size is abnormal, it will usually prompt Faye that some problems may need special attention. If in clinical practice, pupil dilation, then that is to declare death, that person has died. So after people die, their pupils will dilate.

matters needing attention

It is worth noting that atropine can make the pupil dilate, so the patients feel photophobia and difficult to see, but it is a normal phenomenon. During the period of dilation, we should avoid the strong light stimulation, especially the strong sunlight stimulation. As mydriasis is to relax the ciliary muscle regulation, so do not use the eyes close during mydriasis.