| 摘要 |
<p>Disclosed is an automatic cut-off drip chamber with a negative pressure conduction device, including an automatic cut-off drip chamber (1-1) and a negative pressure conduction device (1-2); a sealing arcuate latex film sheet (1-1-5) arranged in the automatic cut-off drip chamber (1-1) drops when the liquid drug is used up to block the flow of the drug liquid in the infusion tube, so that negative pressure is produced in the infusion tube and a negative pressure arcuate latex film sheet (1-2-4) arranged in the negative pressure conduction device (1-2) is made to indent, and gas flow or negative pressure is produced in a negative pressure cavity (1-2-3-4) where the negative pressure arcuate latex film sheet (1-2-4) is located, so that a signal is transmitted to an alarm-monitoring device. The drip chamber makes use of liquid properties and the principles of gravity, pressure and negative pressure, providing the disposable intravenous transfusion system drip chamber and combined device thereof with the functions of automatic cut-off and negative pressure conduction, thereby precluding the phenomenon of air intake and blood reflux due to the drug liquid level sharply decreasing in the infusion tube during intravenous infusion, while providing negative pressure support for an external monitoring system.</p> |
