Jeffrey M. Schwamb,Phillip J. Berman,John R. Prisco
申请号：
US15908029
公开号：
US20190262006A1
申请日:
2018.02.28
申请国别(地区):
US
年份:
2019
代理人:
摘要：
A surgical cutting instrument including an outer tubular member having a proximal section, an intermediate section and a central lumen. An inner tubular member is rotatably received within the central lumen and includes a distal end having a bur extending distally beyond, and exposed relative to, the distal section of the outer tubular member. The bur defines an aspiration pathway that is at least partially oriented at an angle with respect to a central axis of the bur. The aspiration pathway terminates at an opening that can be provided through a head of the bur or proximal to the head. Various embodiments of the disclosure have been shown to reduce clogging of the aspiration pathway during use, particularly during end on drilling. Various embodiments further include a sleeve for reducing lumen clogging as well as irrigation pathways that increase cooling of embodiments utilizing a distal bearing assembly.
