DE556491C - Vessel for injection or aspiration - Google Patents

Description

Vessel for Injection or Aspiration The invention relates to an improvement those intended for the treatment of the human or animal body Vessels working under positive or negative pressure are suitable for injection or aspiration in particular for vessels with relative. moderately large volume, for example for bloodletting or for infusing large amounts of fluids.

According to the invention, for example, such a container has a Organ on, which is located between the valve and the cannula and is completely or partially closed needle and open valve in the case of the presence of The negative pressure in the vessel contracts or closes or at. Overpressure responds in an analogous manner.

In Figs. I to q. are different embodiments of the subject matter of the invention shown.

Fig. I shows a vessel G, which is closed with an elastic stopper P, in which a glass tube carrying the valve h is embedded in such a way that the valve can be opened by moving the glass tube. The injection or aspiration is carried out by an in storage condition. cannula K. closed with a sleeve H. The organ Z forming the subject of the invention is designed as an intermediate piece which is open on both sides and consists of elastic material and is connected as a connecting piece between the cannula and the valve. In Fig.2, which also shows the separated sleeve H, the cannula is rigidly connected to the valve. The organ Z is made of elastic material like a bag with only one connection opening and is attached to the side of the connection between the cannula and valve.

Fig. 3 shows an embodiment in which, as in Fig. 2, made of elastic Material-shaped organ Z is located in the vessel G, otherwise similar to Fig. 2 branching off from the connection line between cannula and valve.

Fig.q .-- shows an embodiment of the organ Z, which is like a check valve acts and through the position of the valve body that prevailing at the switch-on point State.

Before starting the aspiration, does the doctor want to convince himself whether - the vessel is evacuated, it opens before the one that closes the needle end is broken off Sleeve H the closure V seated in the plug P by bending. Is a sufficient one If there is a vacuum in the vessel G, it pulls the organ Z together. He sees it Doctor whether the vessel is OK. Fiat the doctor closed the valve h again, the front end of the sleeve H broken off, the needle inserted into the tissue without to open a blood vessel and then reopen valve Y ', the organ falls Z together again. He is now looking for the collapsed organ Z and with the the needle located in the tissue with its point, the blood vessel or another location at which e @ suspects an accumulation of fluid, at the moment where this point is reached and pierced and the aspiration begins, the organ take its normal form and indicate to the doctor that the needle is in place and the outflow is taking place. The collapse of the organ occurs immediately again when the needle tip is out of the vein, like that by a clumsy one Movement can occur, slipped back out, or when the vein is slowing down or less blood, or the pathological part of the body slower or less fluid than can be sucked in by the vessel. If this circumstance is eliminated, so the organ Z assumes its normal shape again. Under certain circumstances it can get through not just by going up and down completely or by taking intermediate positions a display but at the same time an automatic regulating organ.

In the case of the one with positive pressure and liquid, which is used for injection The vessel can be seen before the injection and before the sleeve H breaks off after opening of the valve V on the organ Z, whether the pressure is sufficient, and can during the injection by checking the tightness of the organ to monitor whether the fluid is in a vein enters the tissue or muscle, or finds an obstruction.

If one puts the organ Z directly in front of the valve V, so that it itself in the vessel G, it is used to test the vacuum or overpressure it is not necessary to open the valve V before breaking off the sleeve H. The latter can be removed immediately, and organ Z then shows the presence of the under- or overpressure.

You already have tubular organs between the aspiration vessel or Injection tube and needle attached. In these orders, the organ served either as a means of closing the filled aspiration vessel after aspiration or it was used to open or close the vessel z. B. by means of an internal Ball or an externally attached bracket. In the present case, the organ lies between the needle and the device used to open or close the vessel and is dimensioned so that it serves the functions previously described, which in the earlier arrangement of elastic organs neither strived for nor achieved became.

Claims (1)

PATENT CLAIM: Vessel for injection or aspiration by means of positive or negative pressure and with a manually operated valve located behind the cannula, characterized by a shape or position change between the cannula and valve, the presence and possibly the strength of that prevailing in the vessel. An organ that automatically indicates overpressure or underpressure when the cannula is completely or partially closed and the valve is open, for example consisting of an elastic, inflating or contracting substance or working like a check valve.