Blood leak detector
First Claim
1. In a detector, comprisinga hydraulic circuit for circulating a fluid, which is to be optically sensed, through a chamberan optical probe for testing the optical transmission of said fluid in said chambersaid optical probe being releasably and sealingly insertable into said chamber for optical coupling to said fluid,a guard means around said optical probe for mechanically protecting said probe against impact or force damage when the probe is being handled and to optically protect said probe against stray light when said probe is in use, the improvement wherein said guard means defines a body having an upper portion and a lower portion, said lower portion having a first slot means for allowing entry of said fluid, said upper portion defining a second slot means allowing exiting of said fluid, said second slot means further providing means for free escape of bubbles which may be contained in said fluid as it passes through said first slot means and said second slot means, and said guard means defining internal surfaces at an angle to the horizontal to facilitate movement of bubbles toward said first slot means.
0 Assignments
0 Petitions
Accused Products
Abstract
A detector of blood in dialyzing solution, which operates by measuring the optical density of the dialyzing solution, is prevented from improper indication arising from the presence of bubbles in the dialyzing solution, by shaping the fluid passages to channel the bubbles away from the optical sensing path.
51 Citations
5 Claims
-
1. In a detector, comprising
a hydraulic circuit for circulating a fluid, which is to be optically sensed, through a chamber an optical probe for testing the optical transmission of said fluid in said chamber said optical probe being releasably and sealingly insertable into said chamber for optical coupling to said fluid, a guard means around said optical probe for mechanically protecting said probe against impact or force damage when the probe is being handled and to optically protect said probe against stray light when said probe is in use, the improvement wherein said guard means defines a body having an upper portion and a lower portion, said lower portion having a first slot means for allowing entry of said fluid, said upper portion defining a second slot means allowing exiting of said fluid, said second slot means further providing means for free escape of bubbles which may be contained in said fluid as it passes through said first slot means and said second slot means, and said guard means defining internal surfaces at an angle to the horizontal to facilitate movement of bubbles toward said first slot means.
-
4. In a detector, comprising
a hydraulic circuit for circulating a fluid, which is to be optically sensed, through a chamber, an elongated optical probe for testing the optical transmission of said fluid in said chamber, said optical probe being releasably and sealingly insertable into said chamber for optical coupling to said fluid, a substantially cylindrical guard means concentrically surrounding said optical probe such that the longitudinal axis of the guard means coincides with that of the probe for mechanically protecting said probe against impact or force damage when the probe is being handled and to optically protect said probe against stray light when said probe is in use, and the improvement wherein said guard means defines a body having an upper portion and a lower portion, said lower portion having a first slot means extending substantially the entire length of said guard means parallel to the axis thereof for allowing entry of said fluid, said upper portion defining a second slot means allowing exiting of said fluid, said second slot means further providing means for free escape of bubbles which may be contained in said fluid as it passes through said first slot means and said second slot means, said guard means defining internal surfaces at an angle to the horizontal to facilitate movement of bubbles toward said first slot means, and the first and second slot means being parallel to the longitudinal guard means and probe axes.
Specification