Two-Step Inflator Screw Mechanism for Precise Stent Pressure Control

The pressure application mechanism is divided into two distinct steps: a first step for initial balloon inflation to a first pressure level, and a second step for final inflation to a second pressure level. This segmentation allows each step to be controlled independently, ensuring precise pressure application required for biodegradable stent implantation while maintaining a relatively simple overall device structure.

The inflator employs a dynamic pressure control system where the pressure application profile changes between two distinct phases. The system transitions from a first pressure level to a second pressure level through controlled movement of the plunger, enabling adaptive pressure control that matches the specific requirements of biodegradable stent deployment without requiring overly complex mechanisms.

The inflation process is divided into two sequential steps with distinct pressure levels and rates. The first step inflates the balloon to an initial pressure level, and the second step completes the inflation to the final nominal pressure. This segmentation allows controlled, gradual pressure increase that prevents sudden pressure spikes while maintaining efficient overall procedure time.

The two-step pressure application mechanism provides a cushioning effect by gradually increasing pressure in two phases rather than applying full pressure immediately. This prevents sudden pressure shocks that could damage the biodegradable stent or balloon, ensuring safe and reliable implantation while still achieving the required nominal pressure efficiently.

The inflator incorporates a pressure sensor that continuously monitors the pressure within the balloon during both inflation steps. This feedback mechanism provides real-time pressure information to the control system, enabling precise pressure control while maintaining simple operator interaction. The system automatically adjusts pressure application based on sensor readings, ensuring accurate pressure monitoring without complicating the operation.

The pressure control system operates autonomously through programmed two-step inflation sequences. Once the operator initiates the process, the system automatically executes the first pressure level, transitions to the second pressure level, and maintains precise pressure control throughout. This self-service capability simplifies operator tasks while ensuring high measurement precision through integrated pressure sensing and control algorithms.