[The biological effects of the CO2 laser studied in experimental intestinal resections]. / Studio degli effetti biologici del laser CO2 nelle resezioni intestinali sperimentali.

An histological and E.M. study has been performed on rat's intestinal tract resection to evaluate CO2 laser effects. Necrotic effect of laser is evident up to 120 micron. While the intestinal tissue results normal at 480 micron from resection line. Muscular and fibrous components appear more resistant to damage while E.M. presents a new organization of its components forming a new compact and continue tissue. This new organization may be involved in the protection of the subepithelial spaces, and may have an important role in intestinal anastomosis scar process.

[A histological and ultrastructural study of the effects of the argon laser scalpel on the kidney]. / Studio istologico ed ultrastrutturale degli effetti del bisturi laser ad argon sul rene.

The authors carried an histological and ultrastructural study on rat kidney following polar excision by argon laser. The involvement of the remainder portion of the kidney was evaluated analysing the depth of the damage induced by the laser radiation. Restitution ad integrum was found below 360 micron thickness with a different involvement of the various kidney components. Glomeruli showed a deep damage caused by intravascular photocoagulation. On the contrary, tubular and extracellular damage was less serious and the damaged area extended for only 240 micron from the section, probably for a lack of absorbance of the argon radiation by clear and water-rich tissues.