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ha·lo vest(hā'lō vest)
The screws attaching the halo to the skull must be kept clean to reduce the risk of infection. Hygiene consists of cleaning each pin two to three times a day as prescribed by a physician. The patient should be instructed on how to use a mirror to inspect the sites for signs of infection, e.g., redness of the skin, or purulent drainage from around the pins. If the vest becomes wet, it should be dried with a hairdryer set on its lowest temperature setting. The shoulders and thorax should be inspected for signs of irritation from the vest. Additional padding may be required around pressure-sensitive areas.