| 摘要 |
A cannula (1) with a central axis (6), a proximal end (3), a distal end (4), a lumen (2) penetrating through said cannula (1) from said proximal end (3) to said distal end (4) and an overall length L; said cannula (1) comprising: A) a shaft portion (11) comprising a rear end (18) and a front end (19); B) a tip portion (14) coaxially extending from said front end (19) of said shaft portion (11) to said distal end (4) of said cannula (1) and including a cutting edge (12); C) a coupling portion (15) terminally arranged towards said proximal end (3) of said cannula (1) and extending to said rear end (18) of said shaft portion (11) suitable for being connected to a surgical tool or instrument; and D) a removable obturator (8) insertable in said lumen (2); wherein E) said shaft portion (11) has a diameter ds and said coupling portion (15) has a maximum diameter dc which is equal to or smaller than said diameter ds of said shaft portion (11); and F) said obturator (8) seals said lumen (2) at the distal end (4) of the cannula (1). A method for improved fracture fixation using the cannula (1 ), a method for intraoperative surgical decision making using the cannula (1) and a method for irrigation of bone tissue and subsequent injection of a bone cement using the cannula (1). |
