Citrate detector for blood processing system
First Claim
1. A citrate detector for use in combination with a blood processing system and a replacement fluid flow conduit of a disposable set, the citrate detector comprising:
- a light source configured to emit an infrared light having a wavelength of approximately 6,353.24 nm, which is absorbed by citrate, but at least partially transmitted by the replacement fluid flow conduit of the disposable set; and
a light detector configured to receive at least a portion of the light from the light source and generate a signal indicative of the presence or absence of citrate in the replacement fluid flow conduit based, at least in part, on the amount of light received from the light source.
1 Assignment
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Accused Products
Abstract
A citrate detector is provided for use in combination with a blood processing system and replacement fluid tubing or conduit of a disposable set. The citrate detector comprises a light source and a light detector. The light source is configured to emit a light having a wavelength absorbed by citrate, but at least partially transmitted by the replacement fluid conduit of the disposable set. The light detector is configured to receive at least a portion of the light from the light source and generate a signal indicative of the presence or absence of citrate in the replacement fluid conduit based, at least in part, on the amount of light received from the light source. A blood processing system incorporating such a citrate detector may include a flow detector for determining whether fluid is present in the conduit prior to checking for the presence of citrate.
66 Citations
20 Claims
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1. A citrate detector for use in combination with a blood processing system and a replacement fluid flow conduit of a disposable set, the citrate detector comprising:
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a light source configured to emit an infrared light having a wavelength of approximately 6,353.24 nm, which is absorbed by citrate, but at least partially transmitted by the replacement fluid flow conduit of the disposable set; and a light detector configured to receive at least a portion of the light from the light source and generate a signal indicative of the presence or absence of citrate in the replacement fluid flow conduit based, at least in part, on the amount of light received from the light source. - View Dependent Claims (2, 3, 4, 5)
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6. A blood processing system for use in combination with a replacement fluid flow conduit of a disposable set and comprising:
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a citrate detector including a light source configured to emit an infrared light having a wavelength of approximately 6,353.24 nm, which is absorbed by citrate, but at least partially transmitted by the replacement fluid flow conduit of the disposable set, a light detector configured to receive at least a portion of the light from the light source and generate a signal indicative of the presence or absence of citrate in the replacement fluid flow conduit based, at least in part, on the amount of light received from the light source; and a controller configured to receive the signal from the light detector and determine whether citrate is present in the replacement fluid flow conduit based, at least in part, on the signal. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method of monitoring fluid within a blood processing system having a replacement fluid flow conduit, the method comprising:
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directing infrared light into the replacement fluid flow conduit, the light having a wavelength of approximately 6,353.24 nm, which is absorbed by citrate, but at least partially transmitted by the replacement fluid flow conduit; detecting light exiting or reflected by the replacement fluid flow conduit; and determining whether citrate is present in the replacement fluid flow conduit based, at least in part, on the light exiting the replacement fluid flow conduit. - View Dependent Claims (18, 19, 20)
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Specification