Monitoring of the infrared radiation emitted from skin layers during CO2 laser resurfacing: a possible basis for a depth navigation device.

CO2 laser resurfacing is very accurate, but it is not free of complications such as scarring. The objectives of the present study were to evaluate the pattern of the infrared (IR) radiation emitted from skin layers and to use this pattern to distinguish between these layers during resurfacing. A CO2-resurfacing laser (Sharplan SilkTouch) was used for the de-epithelialisation of skin. A silver halide optical fibre delivered the radiation emitted from the skin during resurfacing to an IR photonic detector. Time-dependent curves of the signals emitted from the skin layers were statistically evaluated and showed significant differences between the epidermis and the dermal layers. Similar results were obtained during in-vivo and ex-vivo measurements. The difference between the skin layers emission may be used for depth navigation during laser resurfacing.

Walk-through injuries: glass door facial injuries.

During 1998, 13 patients were treated in the Tel-Aviv Sourasky Medical Center for complex facial soft-tissue injuries caused by passing through large, clear glass doors. All epidemiological details were gathered and analyzed. Of 1,100 soft-tissue facial injury admissions in 1 year, 13 patients had a substantial soft-tissue facial injury after passing through a glass barrier. Nine were injured during leisure time activity, five in a shopping mall, and four in their residence. Interestingly, the authors found a common pattern of facial injuries in all patients. It consisted of large, irregular, composite skin and soft-tissue flaps as well as large, tom, irregular skin lacerations. The nose was injured predominantly, and the injury was particularly complex. Their recommended management of these injuries is a thorough and careful evaluation of flap viability. Surgical management of avulsed, viable flaps includes margin debridement and repositioning. If the flap is narrow enough, it can be debrided and the margins adapted primarily. If viability of part of the flap is in doubt, that part should be debrided and used as a composite graft. When this graft dies, a full-thickness graft is taken from another facial site. The cosmesis of such a graft is better than using the debrided, thin segment as a skin graft that is too thin. The authors emphasize that there is a need to encourage authorities to reinforce regulations relating to injury prevention from architectural glass. The first is to use special glazing, either tempered glass, laminated glass, or both. The other method of improving safety is by indicating glass using decorations or warning stickers, or by making it partly translucent. Unless these regulations are obeyed, fatal or complex trauma may occur.