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34.5 MB (34.0 compressed)
4256 x 2832 pixels
36.1 x 23.9 cm ⏐ 14.2 x 9.4 in (300dpi)
JOHN COLE / SCIENCE PHOTO LIBRARY JOHN COLE / SCIENCE PHOTO LIBRARY
Community nursing. Close-up of a pulse oximeter on the finger of an 84-year-old man in his home. Pulse oximeters are used to measure a person's pulse rate and blood oxygen levels.
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