Patent ID: 8328748
Filing Date: 2012-12-11
Classification: A61B,A61M

Abstract:
1. A blood chamber for optically monitoring blood flowing through an extracorporeal tube, the blood chamber defining a flow path through an internal blood flow cavity which provides a viewing area for optical monitoring of the blood, the blood chamber comprising: an internal blood flow cavity disposed between two substantially parallel internal flat walls separated by a predetermined distance; a first port and channel in fluid communication with the internal blood flow cavity; a second port and channel in fluid communication with the internal blood flow cavity, the first port and channel and the second port and channel being in axial alignment along a first axis; a viewing area within the internal blood flow cavity defined by a pair of viewing lenses aligned with at least a portion of the respective flat walls defining the internal blood flow cavity, the viewing region being entirely offset from the first axis; external surfaces of the flat walls each including features configured to mate to complementary features on surfaces of an optical sensor assembly in order to enable attaching the sensor assembly and the blood chamber; and a flow guide structure in the internal blood flow cavity configured to redirect an entirety of the flow of blood in a direction substantially orthogonal to the first axis and into the viewing area, where the flow guide structure is symmetrical so as to similarly redirect the flow of blood whether the flow is from the first port to the second port or from the second port to the first port.