FR2923392A1 - POSITIVE PRESSURE DEVICE FOR THE SIMULTANEOUS ACID CHEMOTHERAPY OF 2 ALTERNATIVELY COMPRESSED COMPONENTS. - Google Patents

Abstract

It is a device in which the cooperation of a bag {5} filled with liquid and a compression element {4} will allow the nursing staff to avoid the phenomenon of aspiration of an implanted catheter, a phenomenon which manifests itself in the removal of a chemotherapy needle.

Description

It has been known for some time already the problems posed by the withdrawal of a chemotherapy needle, namely the suction phenomenon inside the dispensing catheter connected to the implanted chamber.

In fact, the volume of the needle inside the chamber disappears and is compensated by a suction phenomenon at the end portion of the catheter connected to it; this volume is still artificially increased because the Huber bevel needle, which is an angulated needle, has a tendency, by its shape, to cause deformation of the membrane of the implanted chamber. withdrawal. {2Figure 1} These two added values are therefore compensated by a suction at the end of the catheter connected to it {3 Figure 1}. However, the liquid thus absorbed, in fact blood, or one of its figured elements, has a tendency to coagulate inside the catheter during the time when the latter, still in place, is not used for another infusion. .

This coagulation may cause a partial or complete closure of the catheter which is very detrimental to the patient.

That is why we thought of a device allowing the final rinsing during the withdrawal of the needle and not just before this maneuver as do some currently used equipment. The goal is to compensate for the total volume sucked up, or even to continue a little, just after the removal of the needle, to be certain that nothing has been sucked during the period of time the withdrawal maneuver.

To do this we propose to protect the following embodiment: This is a material of an effective volume at least comparable or even slightly greater than that of the total aspirated volume detailed above which would be composed of a cylinder or a pipe or a rigid outer casing (6) of suitable diameter and a useful volume at least necessary to obtain the desired result 35 Inside this cylinder (6), there would be at least two dependent parts one the other as to the work to be done. {4.5}

The first part would be constituted by a flexible tube {4} or an element of rubber or plastic foam of indeterminate shape, placed inside the cylinder having a lateral crushing coefficient sufficient to allow to be compressed by a second element {5}, very flexible tube in this case, and thin but strong wall, of shape identical or not to the first part, but one end of which would be blocked tightly (so to form a sealed bag) {5 45 Figure 5} and whose second end could be connected to a connecting device {7} to a filling device such as the cone luer of a syringe 25 It is therefore through this set, cooperating with the interior of the cylinder, and whose side walls serve as support, which by filling the flexible bag, by means of a syringe for example, or another intermediate element, would come, by filling,. {5 Figure 3} compress and deform the tube or the foam element, which adjoins it {4 Figure 3} Said tube, or foam element, by crashing against the wall of the outer cylinder, thus allow to obtain the complete filling of the bag forming a liquid reservoir.

After closing the communication valve placed between the two elements, and once disconnected the filling syringe, the device can then be connected to the initial element namely the infusion device connected to the chemotherapy chamber. The communication valve then being returned to the open position, the tube placed inside the cylinder, or the compressed foam element, only asking to resume its natural initial shape, will therefore exert pressure on the filled bag. of liquid.

Gradually, depending on the judiciously calculated pressure of the tube, or the foam element, the bag will then empty into the chemotherapy tubing, and will therefore at least compensate for the depression created by the removal of the catheter. needle implanted in the chamber.

The goal will thus have been achieved to avoid a rise in the liquid in the terminal catheter since during the entire maneuver withdrawal of the needle there will have been injection of liquid in the chamber 30 35 40 45

Claims (1)

1. Material said positive pressure, designed to avoid the phenomenon of aspiration when removing a chemotherapy needle characterized by a pipe or rigid outer casing {6} serving to support an internal complex consisting of a first element {4} having a lateral crushing coefficient sufficient to be compressed by a second element {5} and return to its original position during the time required for the withdrawal maneuver of the chemotherapy needle, said second element being closed at one flexible bag end (Figure 5) which, having an external connecting device, {7} can be filled and emptied by cooperation with the first element (4) which abuts it at the time of removal of the chemotherapy needle . -2. Material according to Claim 1, characterized in that the first element {4} is a tube with a sufficiently thick and flexible wall to enable it to recover its initial shape after being squeezed by lateral compression. 3 Material according to Claim 1, characterized by the fact that the first element {4} is a rubber or plastic foam device having the same characteristics of crushing and recovering its initial form 4. Material according to claim 1 characterized in that the second element {5} } closed at one end, is a bag, very flexible and thin-walled, the resistance of which, during its filling, will deform the tube which adjoins it to occupy most of the volume of this last tube or cylinder of foam compressed inside the pipe or outer rigid shell. 5. Material according to claim 1 characterized in that all of this equipment is provided with a standardized connection device such as a syringe, a tap or an injection tubing for a chemotherapy treatment 40 45