Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
(a) Image shows an arborizing catheter and single-port catheter. (b) Magnified image of distal ends of the catheters showing microneedle deflection in the arborizing catheter and the reflux-arresting step change for the respective catheters. (c) Measured angles for the arborizing catheter. Phi (φ) was defined as the angle along the axes of two adjacent needles. Theta (θ) was defined as the angle of deflection of each microneedle in reference to the axis of the cannula.
