Patent ID: 9289319
Filing Date: 2016-03-22
CPC Classification: A61F,A61M

Claim Text:
1. A method for deployment of a stent comprising: delivering a scaffold crimped over a delivery balloon to a treatment site in a bodily lumen, wherein the delivery balloon is connected to an inflation system comprising a valve in a flow path of inflation fluid for flowing through the valve to inflate the delivery balloon, wherein the valve comprises a valve body that encloses a control chamber comprising a passageway for the fluid, the valve body having a distal end with a distal flow orifice for connection with a balloon catheter and a proximal end with a proximal flow orifice for connection with a catheter in fluid communication an inflation device; and flowing the fluid through the inflation system to inflate the delivery balloon and expand the scaffold, wherein the flow induces sliding of a slidable restrictor body positioned within the control chamber in response to the fluid flow toward a tubular valve seat positioned distal to the slidable restrictor body, wherein the slidable restrictor body comprises a distal wall with at least one opening and the tubular valve seat comprises a valve seat opening which allows the fluid to flow through the at least one opening into the valve seat opening and out the distal flow orifice to the balloon catheter, wherein as the distal wall of the slidable restrictor body approaches the tubular valve seat they cooperate to increase restriction to the fluid flow which controls a pressurization rate of the balloon to within a specified range and the at least one opening of the distal wall is positioned with respect to the valve seat opening to allow some fluid flow when the distal wall engages the tubular valve seat at the valve seat opening, wherein the sliding of the slidable restrictor body is opposed by a biasing force of a biasing element.