Control of balloon inflation rate during deployment of scaffold

A method for deployment of a stent, the method comprising:

• injecting an inflation fluid from a fluid source into a hub of a catheter in fluid communication with a delivery balloon via an inflation lumen, the injecting causes the delivery balloon to be inflated by inflation fluid traveling through the inflation lumen, wherein a pressure of the inflation fluid in the inflation lumen and delivery balloon increases as the inflation fluid is injected;
• controlling a rate of fluid pressure increase with a pressure attenuator comprising a chamber filled with the inflation fluid from the inflation lumen, wherein controlling the rate of fluid pressure increase includes allowing a movable containing wall of the chamber to move from a starting position to a final position in response to accumulation of inflation fluid in the chamber and an increase in the pressure of the inflation fluid, and wherein the fluid communication between the hub of the catheter and the delivery balloon via the inflation lumen is present when the movable containing wall is at the starting position and the final position;
• and
• causing fluid pressure of the inflation fluid in the delivery balloon to increase after the movable containing wall is at the final position and with continued injection of inflation fluid into the hub.