Optics: measuring and testing – Blood analysis
Reexamination Certificate
1998-11-15
2001-09-11
Font, Frank G. (Department: 2877)
Optics: measuring and testing
Blood analysis
C422S065000
Reexamination Certificate
active
06288778
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a procedure for examining and storing blood in bags. These bags are placed at the periphery of a circular disc. One or more discs may be placed one above the other, the discs inclined and then rotated so that the contents of the bags becomes thoroughly mixed. Each bag is allowed to pass a station, where a ray of light is directed towards a bag from below, the disc being provided with an aperture allowing the ray of light to reach the bag, pass the bag and then be received by a sensor after the ray of light has passed the bag. The light absorbed by the sensor is then conveyed to a computer for analysis.
SUMMARY OF THE INVENTION
The object of the invention is to provide a practical unit that can be placed in any health care center or hospital. The unit is in the nature of a parallel-epipedic cabinet. A number of circular discs are arranged in the cabinet, spaced from each other and parallel with each other. The discs have an axis of rotation that is substantially vertical, and runs through the center of the discs. The discs are caused to rotate by a shaft located parallel with the axis of rotation and situated external to the discs. The shaft external to the discs influences an endless belt, chain or the like and transmits rotation to the discs which are suitably journalled. An attachment means for bags is arranged along the periphery of the discs so that the bags can be arranged radially. The bag is secured at its outer end by a hook arrangement and the inner end of the bag is secured by a spring element which is placed over the front portion of the bag and secured to the disc on both sides of the bag. Beneath each bag, the disc is provided with an aperture so that a ray of light can pass through the disc and through the bag, and above the light-generating unit is a light sensor so that when a disc rotates, bags arranged on the disc will in turn pass said light source. The sensor takes care of the light obtained and supplies it to a computer which analyses the light obtained. The light rays are constant and when they pass the blood it is subjected to glare, this glare being produced by the thrombocytes. It should be noted here that the thrombocytes may assume different shapes and the glare may therefore differ depending on the condition of the thrombocytes.
Each bag should suitably be given a designation. The unit is provided on one side with a number of openable hatches in front of each disc. Using suitable automatic mechanisms, a specific bag containing a specific quality of blood can be ordered to an opening, and when this bag has arrived in front of an opening it is just a question of opening this and withdrawing the bag. It is extremely convenient to have a cabinet of the type described, with a plurality of discs arranged one above the above so that a very large number of bags can be stored on the discs and where the quality of the blood in the various bags can be determined. Thanks to this, an operator can immediately select a specific bag with specific blood quality. The cabinet thus provides a large storage unit for blood bags of different quality and a bag with the desired quality of blood can be obtained quickly and easily.
REFERENCES:
patent: 4125828 (1978-11-01), Resnick et al.
patent: 4250266 (1981-02-01), Wade
patent: 5345395 (1994-09-01), Griner
patent: 5551941 (1996-09-01), Howell
patent: 5723050 (1998-03-01), Unger et al.
Hvass Per
Jaremo Petter
Dennison, Scheiner Schultz & Wakeman
Font Frank G.
Gematron Medical AB
Punnoose Roy M.
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