US 9,810,604 B2
Sample injection device for flow-type analysis device, flow-type analysis device, and measurement method for hemoglobin component
Takuya Yotani, Tokyo (JP); Takayuki Oka, Tokyo (JP); and Hideki Muraki, Tokyo (JP)
Assigned to Sekisui Medical Co., Ltd., (JP)
Appl. No. 14/781,200
Filed by Sekisui Medical Co., Ltd., Tokyo (JP)
PCT Filed Mar. 27, 2014, PCT No. PCT/JP2014/058829
§ 371(c)(1), (2) Date Sep. 29, 2015,
PCT Pub. No. WO2014/157505, PCT Pub. Date Oct. 2, 2014.
Claims priority of application No. 2013-073455 (JP), filed on Mar. 29, 2013.
Prior Publication US 2016/0041072 A1, Feb. 11, 2016
Int. Cl. G01N 35/10 (2006.01); G01N 1/14 (2006.01); G01N 30/16 (2006.01); G01N 15/14 (2006.01); G01N 33/49 (2006.01); G01N 30/18 (2006.01); G01N 30/88 (2006.01)
CPC G01N 1/14 (2013.01) [G01N 15/1429 (2013.01); G01N 30/16 (2013.01); G01N 30/18 (2013.01); G01N 33/491 (2013.01); G01N 33/4915 (2013.01); G01N 35/1095 (2013.01); G01N 35/1016 (2013.01); G01N 2015/1486 (2013.01); G01N 2030/8822 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A sample injection system for flow-type analysis configured to inject a sample into a carrier-liquid channel, the system comprising:
a cylindrical needle which extends in a vertical direction and penetrates through portions of an upper wall and a lower wall of the carrier-liquid channel at a sample injection position;
ring-like sealing members that seal the penetrated portions of the upper and lower walls;
a vessel frame with an interior surface defining a volume therein, the vessel frame positioned below the lower wall;
a needle moving unit capable of causing the cylindrical needle to move in the vertical direction;
a measurement pump which is operatively connected with the cylindrical needle on an upper end of the cylindrical needle; and
a washing portion of a main body below the carrier-liquid channel,
wherein the cylindrical needle includes an inner hole therein and a horizontal hole between an outer surface of the cylindrical needle and the inner hole, the cylindrical needle closed below the horizontal hole,
wherein the needle moving unit is capable of causing the cylindrical needle to move in the vertical direction to at least a sample drawing position at which the horizontal hole is positioned below the lower wall and faces the interior surface of the vessel frame and a sample injection position at which the horizontal hole is positioned above the lower wall and faces the carrier-liquid channel,
wherein the washing portion of the main body is configured so that the cylindrical needle is positionable at a washing position set between the sample drawing position and the sample injection position such that the horizontal hole is positioned below the lower wall and above the vessel frame,
wherein the measurement pump is operatively connected to the cylindrical needle on the upper end of the cylindrical needle and is configured to perform a drawing operation when the cylindrical needle is positioned at the sample drawing position and a discharge operation when the cylindrical needle is positioned at the sample injection position, and
wherein the measurement pump is operatively connected to a washing liquid tank via a switching valve configured to draw the washing liquid from the washing liquid tank to the measurement pump at one position of the switching valve and to discharge the washing liquid to the cylindrical needle at another position of the switching valve.