Spider et al (2003) had observed in its study that patient intubados in Units of Surgical Intensive Therapy and Center pressures had presented intra-cuff in level above of the necessary one for pressure of ' ' selo' ' ciclagem of the fan. For Martins et al (2000), the gauging of the pressure intra-cuff is not carried through routinely in Surgical Centers and Units of Intensive Therapy. Philip Jr (1990) affirms that the pipes of Lanz and Montgomery are not exempt of complications, being able to occur herniaes of cuff on the tip of the pipe for its high volume or dangerous increase of the inadvertent pressure for the balloon pilot (test ballonet) and for the proper patient, in its anatomical particularitities. Spider et al (2003) concludes in its work that the pressure intra-cuff is the factor most important in gnese of endotraqueais injuries. The pipes of Lanz and Montgomery, according to Willis (1998), are provided with devices that allow to the auto-regulation of the pressure intra-cuff. Penha et al (2004) points these pipes as safe with respect to patients with prognostic of drawn out intubao.

Fort (1996) agrees to Spider et al (2003) and Martins et al (2004) when affirm that the pressure intra-cuff was always above of necessary in patients in Units of Intensive Therapy and the Surgical Centers, and that the gauging of the pressure it is not routine in the studied hospitals. Philip Jr (1990) in the sample also the possibility of complications, exactly to if using these pipes, the pressure intra-cuff raised still can take the iatrogenias. The pipes of Montgomery and Lanz, therefore, are provided with devices special that control the auto-regulation of the pressure intra-cuff, are safe for patients who will possibly pass for drawn out intubao. The pressure intra-cuff of these devices still is ece of fish above of the necessary one for ' ' selar' ' the Surgical trachea in Units of Intensive Therapy and Centers, and its control is not routine in the hospitals.