SELF CONSTRAINING RADIALLY EXPANDABLE MEDICAL DEVICES

摘要

The current invention comprises tubes that can be constrained and expanded by either axial or torsional strain. By torsionally displacing the tube in a direction counter to the biased helices and angularly displacing the lower angle helix to an angle equal to, but opposite, the starting angle, the tube is expanded diametrically with no significant change in length after expansion of the tube. These tubes find utility in medical and non medical applications.

主权项

1. A tubular construct comprising:
a first helical element having a first pitch angle; a second helical element having a second pitch angle; said second helical element being attached in part to the first helical element; wherein when a portion of the tubular construct is rotated, the first pitch angle and the second pitch angle change relative to each other.