Surgical tools used in testing efficacy of UV radiation exposure. (A) Needle holder, (C) forceps, (D) suture, and (E) stab scalpel. The needle holder had an area of concern (B) where the two halves overlapped. The stab scalpel had an area of concern (F) in regard to UV radiation penetration at the point where the blade was inserted into the plastic portion of the stab scalpel. The suture also had an area of concern (G) where the needle and monofilament were swaged together.