Abstract
To estimate the survival time after receiving injury, microspectrophotometry of the red cells in the bleeding area was investigated. In the absorption curves of the red cells, the peaks at the wave lengths of about 530 m& mu; and 410 m& mu; became indistinct, and the angle formed by the absorption cruve between the peaks at 410 my and 275 m& mu; and the horizontal axis tended to become larger with the lapse of time after bleeding. From these changes of the absorption curves, the survival time after receiving injury seems to be estimated more exactly by the microspectrophotometry of an amount of red cells in the bleeding area in injured tissue.
