LIQUID CONTROLLING METHOD

• US 20150289793A1
• Filed: 09/03/2012
• Published: 10/15/2015
• Est. Priority Date: 09/03/2012
• Status: Active Grant

• Current Assignee: Shimadzu Corporation
• Original Assignee: Shimadzu Corporation
• Inventors: Kitamura, Keishi, Nishimoto, Takahiro, Hashizume, Nobuya
• Granted Patent: US 10,463,289 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: A61B 5/15003 for venous or arterial blood
• CPC Class Codes: A61B 5/150221 Valves
• CPC Class Codes: A61B 5/150229 Pumps for assisting the blood sampling
• CPC Class Codes: A61B 5/150236 Pistons, i.e. cylindrical bodies that sit inside the syringe barrel, typically with an air tight seal, and slide in the barrel to create a vacuum or to expel blood
• CPC Class Codes: A61B 5/150244 Rods for actuating or driving the piston, i.e. the cylindrical body that sits inside the syringe barrel, typically with an air tight seal, and slides in the barrel to create a vacuum or to expel blood
• CPC Class Codes: A61B 5/150992 Blood sampling from a fluid line external to a patient, such as a catheter line, combined with an infusion line; blood sampling from indwelling needle sets, e.g. sealable ports, luer couplings, valves tubing connectors and couplings A61M39/00
• CPC Class Codes: A61B 5/153 Devices specially adapted for taking samples of venous or arterial blood, e.g. with syringes
• CPC Class Codes: A61B 5/155 Devices specially adapted for continuous or multiple sampling, e.g. at predetermined intervals devices loaded with multiple lancets simultaneously A61B5/15146
• CPC Class Codes: A61B 5/157 Devices characterised by integrated means for measuring characteristics of blood
• CPC Class Codes: G01T 7/02 Collecting means for receiving or storing samples to be investigated and possibly directly transporting the samples to the measuring arrangement; particularly for investigating radioactive fluids sampling, preparing specimens for investigation in general G01N1/00, G01N1/02; shielded cells or rooms structurally combined with manipulatin devices G21F; measuring of chromatographically separated samples G01N30/00 - G01N30/96

Abstract

Upon blood collection with a disclosed blood collecting apparatus, a part of a flow path adjacent to a suction drain mechanism is filled with a liquid different from the blood. A gas is inserted in the flow path between the liquid with which the part of the flow path adjacent to the suction drain mechanism is filled and a target blood to be collected. The suction drain mechanism pushes and pulls the gas by pushing and pulling the liquid during a standby time between collection and next collection, thereby controlling movement of the target blood. The suction drain mechanism pushes and pulls the liquid and the gas during the standby time, whereby the target blood is continuously moved. This allows prevention of coagulation of the target blood in the flow path.

Claims

1. A liquid controlling method of controlling movement of a target liquid to be collected in a liquid collecting apparatus provided with a flow path having a given length and a suction drain device connected to the flow path for pushing and pulling a liquid, the method comprising:

filling a part of the flow path adjacent to the suction drain device rather than a target liquid to be collected with a fluid composed of at least either a liquid or a gas, and

pushing and pulling the fluid, with which the part of the flow path adjacent to the suction drain device is filled, during a standby time between collection and next collection using the suction drain device.

2. The liquid controlling method according to claim 1, wherein

the pushing and pulling the fluid, with which the part of the flow path adjacent to the suction drain device is filled, repeatedly causes control of reciprocating movement of the target liquid to be collected.

3. The liquid controlling method according to claim 1, wherein

the fluid is composed of both a liquid and a gas, and the method comprises:

filling the part of the flow path adjacent to the suction drain device with the liquid,

inserting the gas into the flow path between the liquid with which the part of the flow path adjacent to the suction drain device is filled and the target liquid to be collected, and

pushing and pulling the liquid with which the part of the flow path adjacent to the suction drain device is filled during the standby time using the suction drain device, causing the gas to be pushed and pulled.

4. The liquid controlling method according to claim 1, wherein

the fluid is composed of a gas, and the method comprises:

filling the part of the flow path adjacent to the suction drain device rather than the target liquid to be collected with the gas, and

pushing and pulling the gas with which the part of the flow path adjacent to the suction drain device is filled during the standby time using the suction drain device.

5. The liquid controlling method according to claim 1, wherein

the fluid is composed of a liquid, and the method comprises:

filling the part of the flow path adjacent to the suction drain device rather than the target liquid to be collected is filled with the liquid, and

pushing and pulling the liquid with which the part of the flow path adjacent to the suction drain device is filled during the standby time using the suction drain device.

6. The liquid controlling method according to claim 3, wherein

the liquid with which the part of the flow path adjacent to the suction drain device is filled differs from the target liquid to be collected, and

the liquid with which the part of the flow path adjacent to the suction drain device is filled is moved in the flow path, causing inside of the flow path to be cleaned.

7. The liquid controlling method according to claim 1, wherein

the target liquid to be collected is blood, and

the liquid collecting apparatus is an apparatus for collecting the blood.

8. The liquid controlling method according to claim 3, wherein

the gas has a volume in a range of 2 to 10 [μ

L].

9. The liquid controlling method according to claim 5, wherein

the liquid with which the part of the flow path adjacent to the suction drain device is filled differs from the target liquid to be collected, and

the liquid with which the part of the flow path adjacent to the suction drain device is filled is moved in the flow path, causing inside of the flow path to be cleaned.

10. The liquid controlling method according to claim 4, wherein

the gas has a volume in a range of 2 to 10 [μ

L].