Medical Valve Lifter Mechanism for Backflow Prevention

The valve applies preliminary anti-action by creating positive distal pressure during the withdrawal process to counteract the back pressure that would otherwise draw blood into the valve. The resilient gland member is pre-configured to expand and push fluid distally when the syringe is removed, preventing blood from being drawn proximally into the valve or catheter before the issue can occur.

The invention inverts the conventional approach by using the withdrawal action itself to generate the desired positive pressure. Instead of applying pressure during injection, the resilient gland member is designed to expand and push fluid distally specifically during syringe withdrawal, converting the withdrawal motion into a protective pressure mechanism that prevents backflow.

The resilient gland member performs self-service by automatically expanding and generating positive distal pressure in response to the syringe withdrawal itself, without requiring external control mechanisms. The material's inherent elasticity allows it to store energy during insertion and release it during withdrawal, creating a self-regulating pressure system that prevents backflow through its own mechanical response.

The invention employs parameter changes by utilizing the resilient gland member's change in physical state (compression to expansion) during the withdrawal process. The gland transitions from a compressed state during syringe insertion to an expanded state during withdrawal, automatically adjusting its volume and pressure output based on the operational phase to prevent backflow without complex control systems.