Valve-equipped hand switch and chemical liquid introduction system
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United States of America Patent
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Feb 18, 2014
Grant Date -
Jul 18, 2013
app pub date -
Jul 26, 2010
filing date -
Jul 26, 2010
priority date (Note) -
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Abstract
In a valve-equipped hand switch and a chemical liquid introduction system, a contrast medium in a syringe is delivered to a patient line through a first port, a main passage around a spacer portion, and a second port. Furthermore, a pressure (about 300 psi) of the contrast medium delivered by a chemical liquid introduction device is transmitted as a reaction force through a third plunger from a handle portion of an operation piston held by an operator. As such, the operator can directly feel the pressure of the introduced contrast medium, which gives a sense of ease to the operator during operation.
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