Optimal needle length of automatic injectors.
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Biomedical subjects
Publications and source records attributed to Y Glovinsky.
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Time of useful consciousness (TUC) was determined in 17 subjects exposed twice to 25,000 ft (7,620 m) in an altitude chamber. The criterion for TUC determination was inability to add two-digit numbers correctly. Median values of TUC were 267.5 seconds (s) in the first exposure and 240 s in the second. The intraindividual variability between the two exposures was 40.6 s. The probability of remaining in "useful" consciousness as a function of time at 25,000 ft (7,620 m) was similar in both exposures. The need for a more scientific approach towards the determination of time of useful consciousness in simulated high altitudes is raised.
A case of an accidental exposure to a high intensity Q-switched infrared laser beam is described. A paramacular burn, splinter hemorrhages on the disc margin, and vitreous hemorrhage were the initial findings. Later, a paramacular pucker developed, causing reduction in visual acuity to 6/12. Microvascular accident on the disc margin is assumed to be the cause of a paracentral scotoma located fairly far from the image area.