Patent ID: 9642992
Date: 2017-05-09
CPC Classifications: A61M,Y10T

Claim:
1. A method for manufacturing a safety catheter, which comprises: providing a flexible, multi-lumen shaft having an outer diameter, a distal tip and a proximal drain end with: providing the shaft with a distal hollow balloon portion defining a balloon interior and having at least one inflation port fluidically connecting the at least one inflation lumen to the balloon interior to permit the balloon portion to inflate outwardly to a diameter greater than the outer diameter of the shaft when filled with an inflation fluid provided through the at least one inflation lumen; fluidically connecting the drain lumen to at least one of the balloon interior and the at least one inflation lumen with a drainage port; coaxially placing a hollow stretch valve in the drain lumen to prevent fluid from passing through the drainage port in a steady state and to permit fluid to pass through the drainage port in a stretched state when the shaft is stretched, the stretch valve having: distal of the connection of the proximal valve end within the drain lumen, providing the shaft with a stretching extent that is relatively more stretchable than at least a portion of the shaft that is proximal of the stretching extent.