Patent ID: 11918410
Assignee: SMITHS MEDICAL ASD, INC.
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 2:
3. A needle, comprising:
a shaft extending along a longitudinal axis having an outer circumferential wall, a proximal end and a distal end including a sharp tip;
one continuous spiral groove formed spirally from at least adjacent the sharp tip to a predetermined distance away from the sharp tip, the one groove having two walls orthogonal to each other formed onto the outer circumferential wall such that the orthogonal walls each are formed at an angle (α) of approximately 5° to 25° tilted toward the proximal end of the shaft away from a 45° angle extending along the outer circumferential wall of the shaft, the angle (α) reflective of a desired insertion angle of the needle into a subject such that one of the walls of the one groove is adapted to be positioned to reflect in a reverse direction the ultrasound waves emitted from an ultrasound transducer toward the needle back to the transducer when the shaft is positioned substantially at the desired insertion angle for insertion into the subject;
wherein the angle (α) is preferably at 10° such that the one wall closer toward the proximal end of the shaft is at an angle of approximately 35° relative to the outside wall of the shaft and the other wall away from the proximal end remains orthogonal to the one wall.