Containment bed isolator showing a patient in bed, a nurse in a half-suit, and the entry port on the supply trolley in use; (A) air supply unit, (B) supply trolley, (C) attachment sleeve, (D) half-suit, (E) supply air filter, (F) exhaust air filter. Source: P. C. Trexler, R. T. D. Emond, and B. Evans, "Negative-Pressure Plastic Isolator for Patients with Dangerous Infections," Brit. Med. J. 2 (1977): 559-61, 560.
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