Hemostasis Valve, Catheter Sheath, and Method for Sealing Interventional Instrument

Abstract

This disclosure provides a hemostasis valve, a catheter sheath, and a method for sealing an interventional instrument. The hemostasis valve includes a housing defining a through-region; a sealing membrane disposed in the through-region and having a tubular structure with a lumen configured as an instrument passage; a driving chamber defined between an outer periphery of the sealing membrane and an inner wall of the through-region for filling fluid; and a balancing chamber communicated with the driving chamber and located outside the driving chamber and in the housing. The hemostasis valve includes an energy storage mechanism linked in motion with the fluid, the fluid is linked in motion with the energy storage mechanism via the balancing chamber, the energy storage mechanism is configured for storing or releasing energy when state of the sealing membrane is changed and driving the sealing membrane to close the instrument passage when releasing energy.

Dependencies are inferred from the claim text.