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

a. 124 nm.

b. 324 nm.

c. 254 nm.

d. 424 nm.

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

a. 30-180 s.

b. 1-29 s.

c. Determined using MED.

d. 181-360 s.

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

a. Adenine

b. Thymine

c. Guanine

d. None of the above

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

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

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

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

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

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

a. Hyperthyroidism

b. Renal disease

c. Photosensitivity

d. All of the above have been reported

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

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

b. At a 90° angle to the wound bed.

c. At a 30° angle to the wound bed.

d. Directly parallel to the wound bed.

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