Gravity actuated intravenous infusion appts. - has flow control valve formed by float chamber with float activated by liquid dripping from dripping chamber

摘要

Gravity actuated intravenous infusion appts. is provided with a flow control valve comprising pointed tube assembly adapted for piercing the infusion bag ans supporting a dripping chamber below which is arranged a float valve comprising a float chamber and a float. Chamber is vented to atmos. and the float is lifted by liquid dripping into the chamber, the dripping of the liq. into the injection needle being rendered independent of the variation of blood pressure in the patient's vein. Flow rate is maintained at a constant value.