GB1462009A – Blood leakage detector having photosensing operation
– Google Patents
GB1462009A – Blood leakage detector having photosensing operation
– Google Patents
Blood leakage detector having photosensing operation
Info
Publication number
GB1462009A
GB1462009A
GB796775A
GB796775A
GB1462009A
GB 1462009 A
GB1462009 A
GB 1462009A
GB 796775 A
GB796775 A
GB 796775A
GB 796775 A
GB796775 A
GB 796775A
GB 1462009 A
GB1462009 A
GB 1462009A
Authority
GB
United Kingdom
Prior art keywords
cells
photo
conduit
dialysate
passages
Prior art date
1974-03-22
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB796775A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Baxter International Inc
Original Assignee
Baxter Travenol Laboratories Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
1974-03-22
Filing date
1975-02-26
Publication date
1977-01-19
1975-02-26
Application filed by Baxter Travenol Laboratories Inc
filed
Critical
Baxter Travenol Laboratories Inc
1977-01-19
Publication of GB1462009A
publication
Critical
patent/GB1462009A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
Classifications
A—HUMAN NECESSITIES
A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
A61M1/14—Dialysis systems; Artificial kidneys; Blood oxygenators ; Reciprocating systems for treatment of body fluids, e.g. single needle systems for hemofiltration or pheresis
A61M1/16—Dialysis systems; Artificial kidneys; Blood oxygenators ; Reciprocating systems for treatment of body fluids, e.g. single needle systems for hemofiltration or pheresis with membranes
A61M1/1692—Detection of blood traces in dialysate
A—HUMAN NECESSITIES
A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
A61M2205/00—General characteristics of the apparatus
A61M2205/33—Controlling, regulating or measuring
A61M2205/3306—Optical measuring means
A61M2205/3313—Optical measuring means used specific wavelengths
Abstract
1462009 Blood leakage detector BAXTER TRAVENOL LABORATORIES Inc 26 Feb 1975 [22 March 1974] 7967/75 Heading G1A Such a detector comprises opaque thermally conductive block 12 with bore 13 closely receiving transparent flow conduit 11, passages 14 perpendicular to conduit 11 and 15, which is clear, which intersect at one end where light source 17 is mounted, photo-cells 20, 21 at their other ends and an alarm circuit responsive to the difference of light intensity reaching the photo-cells. Dialysate from an artificial kidney machine circulates through conduit 11. Lamp socket 16 is adjustably secured in bore 18 of aluminium block 12 by set screw 19. Photo-voltaic cells 20 and 21, such as silicone cells, are mounted ahead of identical filters 22, 23 of 550-560 nm corresponding to a secondary absorption peak of haemoglobin. Retaining plate 24 has apertures 27, 28 for cell leads. Light obstructing calibrating screw 25 has locknut 26. The effective lengths of passages 14, 15 are the same. The heating effect of the lamps or of the dialysate affects photo-cells 20, 21 equally. Lamp 17 is at the focus of the lens equivalent to conduit 11 and its contents. Illumination flux in a solid angle of 25C reaches photo-cells 20, 21. Bulb 17 provides a high output from 540-570 nm. In the alarm circuit of Fig. 3 comparator amplifier 33 gives 1V output when V x > reference voltage V B and 17V when V x
