INTRODUCTION The design of a surgical rotary vacuum shaver as a predecessor to the microdebrider has been attributed to Urban in 1968. His targeted use of this device to assist in the removal of acoustic neuromas did not find general use. Powered shavers were subsequently adopted in the field of orthopedic surgery and reintroduced successfully in the 1990s into otolaryngology for use in endosco...

Suction with a partial vacuum of -70 mm. Hg applied to normal skin of rabbits causes intracutaneous hemorrhage after an average time of 8 minutes. Inflammation produced by various agents, including turpentine, killed streptococci, staphylococci, pneumococci or meningococci, and filtrates from cultures of meningococci or typhoid bacilli, produces a series of changes that are almost uniform. Imme...

The consideration of the convective heat transfer in the suction and discharge region of a compressor is handled differently in the literature. Commonly used are correlations for a steady state turbulent flow through a pipe like Chrustalev et al. (1998), Xin et al. (2000), Link et al. (2007). Here it is a point of principle whether such an approach is justified. Subjects of the present work are...