Patent ID: 7435237
Filing Date: 2008-10-14
Classification: A61M

Abstract:
1. A medical system, comprising: a syringe system comprising: a housing having a first compartment and a second compartment, the first and second compartments capable of being in fluid communication; and a plunger having a plunger base disposed within the housing, the plunger adapted to apply pressure to fluid in the housing; and a membrane disposed between the first compartment and the second compartment, the membrane limiting fluid communication between the first compartment and the second compartment, the membrane breakable to allow contents of the first compartment to mix in the housing with contents of the second compartment; wherein the first and second compartments are arranged in series relative to an outlet of the housing; and wherein the membrane includes an annular region with reduced thickness relative to a thickness of a central region of the membrane, the annular region comprising a first region of reduced thickness configured to preferentially fail and a second region of reduced thickness which is thicker than the first region of reduced thickness, the first region of reduced thickness extending around a first portion of a perimeter of the membrane and the second region of reduced thickness extending around a second portion of the perimeter of the membrane.