ACCESS NEEDLES AND STYLET ASSEMBLIES

摘要

Access needles and methods of using the needles are set forth in this disclosure. The needles can include a handle and a cannula having a proximal end operatively connected to the handle, a distal end, and a lumen extending through the body of the cannula. A protective sheath may surround the cannula. Further, a stylet may be removably disposed within the lumen of the cannula. The stylet includes a piercing tip at a distal end and a flexible body length extending proximally from the piercing tip to the handle. The flexible body of the stylet provides a path of fluid communication through the lumen of the cannula such that a contrast fluid can effectively pass through the lumen of the cannula. Methods of introducing cannulas to target locations within a body of a patient are also set forth in this disclosure.

主权项

1. An access needle comprising:
an elongate hollow cannula having a proximal end, a distal end, and a lumen extending therebetween; and a stylet removably disposed within the lumen of the cannula, the stylet comprising: a piercing tip at a distal end of the stylet; and a flexible body length extending proximally from the piercing tip toward the proximal end, whereby the flexible body of the stylet provides a path of fluid communication through the entire lumen of the cannula such that a contrast fluid can effectively pass through the lumen of the cannula.