A breakaway hemostasis hub (20) for a catheter or introducer sheath includes a splittable or separable housing (40), a seal (56) within the housing, an actuator (50) partially slidably disposed within the housing, a pair of spring retainer members (64) in the housing each adapted to receive at least one spring, and a pair of actuator retainer members (70) adapted to retain the seal, the actuator, and the spring retainer members in the housing. The actuator is operable to assume a closed position and an open position and includes a dilator member configured to dilate the seal when the actuator is in the open position. The hub is splittable or separable into two generally symmetrical sub-assemblies to facilitate cutting the catheter for retraction from the patient's body without displacing its payload.
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