Patent ID: 8768487

Claim:
A cannula for insertion through a biologic tissue, the cannula comprising: a shaft comprising proximal and distal end portions and a lumen extending therebetween; a tip having a proximal end portion, a distal tip end, and a lumen extending therebetween, the proximal end portion of the tip being secured to the distal tip end of the shaft, and a hub having proximal and distal end portions and a lumen extending therebetween, the distal end portion of the hub positioned at the proximal end portion of the shaft such that the lumen of the hub is in fluid communication with the lumen of the shaft, and the proximal end portion of the hub is configured to be coupled to an auxiliary device, the tip having a first distal tip opening at the distal tip end and a second opening communicating with the lumen of the tip, the second opening extending proximally relative to the distal tip end, wherein the second opening of the tip extending proximally is configured to permit fluid to be continuously drawn into the lumen of the tip even in the event the distal tip opening becomes obstructed.