DE2636812A1 - Throw away infusion cannula - has stop cock at end of plastic tube turnable by puncturing steel tube - Google Patents

Abstract

A throwaway infusion cannula for arterial and venous punctures consists of an outer plastics tube and an inner steel tube, ground to a point. Near the end of the plastics tube a stop cock ensures than no blood can emerge from the extension when the steel tube is extracted after completed puncture.

Description

Infusion cannula for art. and ven. Infusions with

Stopcock and central injection membrane 'plastic infusion cannulas consist of an outer flexible plastic tube, one that is ground to a point at the front Steel tube inside and are used as disposable infusion cannulas for the sake of simplicity, the savings and the prevention of infection germ-free in empty plastic containers Supplied ready-to-use.

The corresponding vessel is made with the pointed steel tube pierced. Once this steel tube of the infusion cannula has reached the vessel, it flows Blood through the lumen of the steel tube into the blood chamber attached at the end.

This is now the sign that the vessel has reached and the steel pipe can be slowly withdrawn from the flexible plastic tube above can.

At the same time, the plastic tube is carefully pushed further into the vessel introduced.

With the pulling out of the steel pipe, however, flows with the conventional Infusion cannulas follow the blood through the plastic tube and enter after total Remove the steel tube from the conical Record or Luer fitting.

Now comes the leaked blood of the patient with the skin of the other Person in contact, it can lead to a germ or virus transmission, which may lead to serum hepathitis.

In order to eliminate this mentioned danger to the health of the other, is the invention of the new infusion cannula shown in FIGS. 1 and 2 provided with a stopcock.

This shut-off valve not only guarantees absolute shut-off, but also at the same time the possibility of z. B. a circulation stabilizing To administer drug to the patient.

The embodiment of the invention is described below in connection with described in the attached figures: The pointed and sharply ground steel tube (1) is pierced intracutaneously up to the selected vessel. At the same time also has the flexible plastic tube (2) reaches the punctured vessel and has penetrated.

If the pierced vessel is fully reached, depending on the pressure, the Blood through the hollow steel needle (1) to the subsequently attached blood chamber (7).

(Steel tube with a sharpened sharp point (1) and then attached blood chamber (7) form a unit).

This is the sign that you can use the ground steel tube (1) connected blood chamber (7) can now carefully withdraw.

Does the tip of the steel tube (1) have the point (3) when it is withdrawn reached, the stopcock (5) by turning the steel pipe (1) and connected Blood chamber (7) by approx.

45 degrees to the right or left.

This ensures that the blood flowing back only up to the point (3) can penetrate and not as before, to point (6), where it is then with the skin of the treating person comes into contact and leads to the aforementioned damage to health can lead.

The rubber membrane (4) in the center of the stopcock (5) is used to administer additional medication to the patient in an ongoing infusion.

Once the steel tube (1) with the attached blood chamber (7) has been removed, so the record or Luer extension piece (6) from the stopcock (5) has an approximately right-angled Position to the longitudinal axis of the plastic pipe (2).

In this tap position, you can now carefully remove the extension piece of the infusion set in the cone (6) of the infusion cannula.

If you turn the tap (5) with the extension piece (6) and the one attached to it The end piece of the infusion set is back in its original position, that is in the longitudinal axis to the plastic pipe (2), the stopcock is open and the patient can be supplied.

In the case of therapy lasting several days or weeks, it is required that after stopping each infusion or after administering a another medication, leaves a liquid level in the plastic tube (2) and then close the stopcock.

Claims (3)

Claims 1. Infusion cannula for single use, consisting of an outer plastic tube and an inner, pointed steel tube, for art. and ven. Punctures, characterized in that at the end of the plastic tube a stopcock is located, which absolutely guarantees that if the puncture has taken place a corresponding vessel and removal of the steel tube, no blood from the attachment exit. 2.) Infusion cannula according to claim 1, characterized in that the stopcock can already be turned to the "closed" position by means of the steel pipe can. This possibility ensures that there is no direct contact with the practitioner must be done to the stopcock to turn it off. What also has the consequence that virus or germ transmissions and thus possible damage to health for the practitioner can be avoided. 3.) Infusion cannula according to claim 1, characterized in that there is a rubber membrane in the center of the stopcock, which is an additional Injection of a z. B. circulatory stabilizing drug in an ongoing Infusion also enables long-term therapy with proper care enables.