SU712094A1 - Device for intravascular introduction of liquid - Google Patents

Description

The invention relates to the field of medical equipment, namely to devices for intravascular administration of a liquid, for example, blood, blood substitutes and infusion solutions.

A device for intravascular injection of fluid, comprising a housing with nozzles for injected fluid and for separated gas, a float valve, a gas filter, needles for connecting the device to a vessel with infusion fluid and to a patient, a clamp and tubing [1].

A disadvantage of the known device is that when the liquid is introduced to the patient, constant monitoring is required to exclude the possibility of air entering the patient's blood vessel, which can lead to gas embolism.

The purpose of the invention is the prevention of thrombosis and simplification of maintenance.

This goal is achieved by the fact that the float valve is made on-off and can block in one case the opening of the nozzle for liquid, and in another case, the hole of the nozzle for detachable gas.

The drawing shows the proposed device, a longitudinal section.

A device for intravascular injection of fluid into the body consists of a housing 1, divided by a partition 2 into the upper 3 and lower 4 chambers. In the upper chamber there is a needle 5 for connecting 10 to containers with an infusion medium, a gas outlet pipe equipped with a bactericidal filter 7, and a float valve 8. The lower chamber is connected through a connecting tube 9 and a needle 10 to the patient's blood vessel 15. A clamp 11 is mounted on the connecting tube 9 to control the fluid flow rate. In the partition 2 there is a pipe 12 for the exit of fluid.

The device operates as follows.

After introducing the needle 5 into the container, the infusion fluid enters the upper chamber 3, while the clamp 11 is closed, and air 25 is discharged from the chamber through the nozzle 6.

At the time of filling, the float valve 8 is in the lower position, blocking the opening of the nozzle 12 for liquid exit. As the upper chamber is filled with liquid, the float valve 8 pops up and closes the hole of the nozzle 5 ka 6 for gas removal.

To fill the lower chamber, the liquid is pumped by pressing the lower semi-rigid part of the housing 1. At the same time, air from the lower chamber 4 enters 10 into the upper chamber 3 and through the hole of the pipe 6 for venting gas into the atmosphere, and the liquid through the hole of the pipe 12 enters the lower chamber 4, filling it to the required level. fifteen

In the process, the liquid through the opening of the pipe 12 drip or stream enters the lower chamber 4 and then to the patient. When the container is empty, air will flow into the upper chamber. 20 The liquid level in the upper chamber will decrease, the float valve will lower and close the opening of the fluid nozzle 12. Due to this, air does not enter the connecting tube 9, which eliminates 25 gas embolism.

The device can be connected to another capacity without disconnecting from the patient's circulatory system and without re-filling with infusion fluid. thirty

When you turn on other medical equipment, such as a cardiopulmonary bypass system, the proposed device constantly automatically bleeds incoming 35 air bubbles through the opening of the pipe 6 for gas outlet, which ensures uninterrupted operation of the system and eliminates thrombosis. In the case of using the proposed device in systems 40 of artificial circulation, the needle 5 can be replaced by a fitting for connection to the highway.

Claims (1)

(54) THE DEVICE FOR INTRAVASCULAR INTRODUCTION OF THE LIQUID is in the bottom polarity, blocking the opening of the nozzle 12 for the liquid to exit. As the upper chamber is filled with liquid, the float valve 8 floats up and closes the opening of the nozzle 5 to allow gas to escape. To fill the lower chamber, the liquid is pumped by pressing the lower semi-rigid part of the housing 1. At the same time, air from the lower chamber 4 enters the upper chamber 3 and through the opening of the nozzle 6 for venting gas to the atmosphere, and the liquid enters the lower chamber through the opening of the nozzle 12 4, fill it up to the required level. In the process, the liquid through the opening of the nozzle 12 drip or jet enters the lower chamber 4 and further to the patient. When the tank is empty, air will flow into the upper chamber. The fluid level in the upper chamber will decrease, the float valve will lower and close the opening of the nozzle 12 for the fluid. Due to this, the air does not get into the connecting tube 9, which excludes 25 gas emboli. The device can be connected to another container without disconnecting from the patient’s circulatory system and without being refilled with infusion fluid. When other medical equipment, such as the artificial blood circulation system, is switched on in the line, the proposed device continuously automatically blows 35 incoming air bubbles through the opening of the nozzle 6 to remove the gas, which ensures uninterrupted operation of the system and eliminates clot formation. If the proposed device is used in the artificial blood circulation system 40, the needle 5 may be replaced by a fitting for connection to the highway. Apparatus of the Invention A device for intravascular injection of a liquid, comprising a housing with nozzles for injecting liquid and for a separable gas, a float valve, a gas filter, needles for connecting the device to the ipfusion liquid vessel and to the patient, a clamp and a conduit pipe, which distinguishes Maintenance of two one bridges for pr 1. 1/10 so that, in order to prevent and simplify, the float valve is made one-dimensional and can, in tea, block the opening of the branch pipe for the other, the opening of the gas branch pipe. The source of information, e into account in the examination of t of France No. 2071039, cl. F 161 l. 1969.