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CHAPTER NINETEEN. Ultraviolet C

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The optimal wavelength used to kill bacteria in a wound bed using ultraviolet C is

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a. 124 nm.

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b. 324 nm.

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c. 254 nm.

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d. 424 nm.

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The amount of time it takes to kill bacteria in a wound bed using UVC is

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a. 30-180 s.

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b. 1-29 s.

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c. Determined using MED.

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d. 181-360 s.

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The photochemical reaction caused by the application in UVC causes what proteins in the DNA of bacteria to bind, leading to cell death?

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a. Adenine

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b. Thymine

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c. Guanine

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d. None of the above

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How far should the UVC source be held from the wound bed?

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a. The distance the UVC light source is held from the wound bed is irrelevant.

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b. The UVC light source should be held directly against the wound bed.

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c. 2.54 cm (1 inch) without any dressings in place.

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d. 2.54 cm (1 inch) with a transparent film covering the wound bed.

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Which of the following conditions has been reported as a contraindication or precaution for the use of ultraviolet C in the treatment of wounds?

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a. Hyperthyroidism

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b. Renal disease

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c. Photosensitivity

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d. All of the above have been reported

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According to the law of cosines, the ultraviolet source should be held

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a. At any angle to the wound bed, as the position of the light source is irrelevant.

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b. At a 90° angle to the wound bed.

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c. At a 30° angle to the wound bed.

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d. Directly parallel to the wound bed.

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