Vacuum blood sample collecting device
AssigneeTerumo Kabushiki Kaisha
InventorsFumiaki Inaba, Satoshi Inoue
Life of this patent
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Abstract
A blood sample collecting device includes a vacuum blood sampling chamber having a blood container disposed therein, and a vacuum pump for evacuating the vacuum blood sampling chamber to collect a blood sample into the blood container under a vacuum developed in the vacuum blood sampling chamber. The amount of collected blood in the blood container, and the vacuum in the vacuum blood sampling chamber is lowered below a preset pressure on the condition that a rate of increase in the measured amount of collected blood does not reach a predetermined normal rate of increase.
Claims17
A blood sample collecting device comprising:
- a vacuum blood sampling chamber having a blood container disposed thereon;
- a vacuum pump for evacuating the vacuum blood sampling chamber to collect a blood sample into the blood container under a vacuum developed in said vacuum blood sampling chamber;
- measuring means for measuring the amount of collected blood in said blood container;
- means coupled to said measuring means for determining a rate of increase in the measured amount of collected blood;
- and
- control means for lowering the vacuum in said vacuum blood sampling chamber below a preset pressure when said determined rate of increase in the measured amount of collected blood is less than a predetermined normal rate of increase.
A blood sample collecting device comprising:
- a vacuum blood sampling chamber having a blood container disposed therein;
- a vacuum pump for evacuating the vacuum blood sampling chamber to collect a blood sample into the blood container under a vacuum developed in said vacuum blood sampling chamber;
- a pressure sensor for detecting the pressure in said vacuum, blood sampling chamber;
- memory means for storing a preset pressure to be developed in said vacuum blood sampling chamber, said memory means comprising a nonvolatile memory capable in which said preset pressure can be rewritten;
- and
- control means responsive to the pressure detected by said pressure sensor and the preset pressure stored in said memory means for turning on and off said vacuum pump so that the pressure detected by said pressure sensor will coincide with the preset pressure stored in said memory means.
A blood sample collecting device comprising:
- a vacuum blood sampling chamber having a blood container disposed therein;
- a vacuum pump for evacuating the vacuum blood sampling chamber to collect a blood sample into the blood container under a vacuum developed in said vacuum blood sampling chamber;
- measuring means for measuring the amount of collected blood in said blood container;
- means coupled to said measuring means for determining a rate of increase in the measured amount of collected blood;
- and
- control means for controlling said rate of increase in the measured amount of collected blood during a blood collecting cycle.
Dependencies are inferred from the claim text.