Patent ID: 6126643
Filing Date: 2000-10-03
Classification: A61B

Abstract:
A blood collecting syringe comprisinga cylindrical barrel having a duct at a distal end for connection to a blood sampling system;a hollow deformable stopper defining a discard chamber therein and being slidably mounted in said barrel to move between a first position adjacent said distal end and a retracted position spaced therefrom to define a specimen collecting chamber therebetween;a valve in a distal end of said stopper to permit a flow of fluid into said stopper; anda plunger slidably mounted in said barrel and connected to said stopper, said plunger being movable between a first position compressing said stopper into a longitudinally collapsed state and a second position remote from said distal end of said barrel to move said stopper into said retracted position whereby upon movement of said plunger from said first position toward said second position thereof and expansion of said stopper from said collapsed state, fluid from a blood collecting system connected to a patient is drawn into said discard chamber in said stopper and upon movement of said stopper from said first position thereof fluid from the sampling system is drawn into said specimen collecting chamber.