FI64289C - INFUSIONSKATETERANORDNING - Google Patents

Description

1 64289

Infusion catheter device - Infusion catheter morning

By division separated from application 2421/74 Avdelad ur ansökningen 2421/74

The invention relates to an infusion catheter device comprising a dispenser having a side-opening connection piece for connection to an infusion container when the needle is in position. The object of the invention is to provide a catheter device enabling further injection, which can be completely and in a controlled manner filled with infusion fluid before insertion and with which the infusion can be started immediately when the injection has been found to be successful.

U.S. Pat. No. 3,459,184 discloses a catheter device provided with a '/ shaped' distributor for allowing the catheter to be pushed forward and connected to an infusion system. It is a device equipped with a massive needle which can easily be inserted into the vein itself, but the device, for example, cannot be pre-filled with infusion fluid.

A catheter is also known from German design protection 70 23 249, which is provided with a '/ shaped' distributor for the simultaneous delivery of most substances to the circulatory system. The purpose of this known device is to keep the dosing amount constant for a longer period of time. Both tubes of the manifold continue in the catheter and are arranged so that the larger tube surrounds the smaller one. In both tubes, the flowing liquid mixes in a larger diameter tube because the inner tube terminates before the outer tube.

U.S. Patent No. 3,495,594 also describes a catheter having a / shaped connector with tubes extending as 2,648,289 catheter channels. Here, however, the injection channel is at a second pressure adjacent to the lawful fluid delivery channel for inflating the bag.

L. Lachhein und G. Jaenecke, "Medizinische Klinik" 64, 1969, No. 29, pages 1317-1320, describes so-called double-bone catheters which are preferably used for hemodialysis of renal patients. This is a method using transparent double-knee ethylene tubing with an octagonal cross-section and a lute that allows the delivery of two single catheters.

The device according to the invention, on the other hand, is characterized in that the outer wall of the injection needle inside the catheter placed directly in the tube of the dispensing piece is provided with a longitudinally closing groove.

The infusion catheter thus consists of a flexible synthet. from a wave, such as PTFE, which has a needle inside the catheter. Jakokapp. The Leur swamps tube then surrounds the k. · .he'd ia ia • lobby reefs να · k · * -. -'iren ot; kk j (connecting piece) at an acute angle ends in a shark · pipe and is intended as a connecting piece.

With this laterally opening distributor connection, a very soft tube about 20 to 25 cm long can be connected to the connection piece and at the same time connected to the infusion catheter. At one end of this hose is a female Ix connection cone (e.g., a Luer or Luerlok cone) with which the hose can be connected to a replaceable container. This ensures that when working with the connection cone (for example, by connecting or replacing the storage tank?), The resulting pressure or tensile stresses cannot be transmitted, causing damage to the vessel walls. during contrast to conventional devices is not left in the vein.

The infusion channel in the straight tube of the manifold terminates before the orifice of the connector so that the infusion fluid flowing into the tube of the manifold through the connecting piece is directed directly into the infusion channel. The puncture passage further protrudes from the opposite end of the cannula to the needle tip and is preferably provided with a handle to allow safe removal of the vessel and catheter quickly, the opposite end of the catheter being formed of, for example, a soft rubber sealing plate sealing The sealing plate thus prevents the infusion solution from escaping.

If it is desired to administer a solution other than the solution fed to the catheter through the connector, such additional solution can be added simply through the device by inserting the injection needle through the sealing plate and injecting the liquid in the syringe directly into the tube.

In order to facilitate the withdrawal of the needle, the handle for the catheter and the dispenser can in principle be of any shape. However, it is particularly useful to provide the needle with a handle formed from a single-piece shaped ion stem. Such a handle, which is hollow and provided with an air-permeable membrane, may, for example, be in the shape of a curved-sided triangular prism, the cross section of which mainly corresponds to the shape of underlying equilateral triangles with large concave side surfaces and a narrower base surface. hollowed.

4 64289 The advantage of such a handle is that it ensures the anatomically correct use of the device when inserting the needle into the vein and at the same time indicates to the person using the device the position of the needle edge in the vein. At the same time, the handle can act as a blood-collecting container, which is easier to observe due to the balance-like concavities of its walls. Thanks to the air-permeable sealing membrane in the handle, there is no need to use a separate plug in the device.

In a preferred embodiment of the invention, a washer is provided on the lower side of the manifold adjacent the handle, terminating at approximately the point where the catheter protrudes from the straight tube of the manifold. Such a base plate, which is preferably at its widest at the end of the handle and tapers towards the other end, facilitates the attachment of the device to the arm by means of a patch or the like. In addition, the simple connection of the connecting hose to the storage container allows for a very flat device structure, whereby the position of the catheter in the patient's arm is improved and maintained.

Other advantageous structural details used in known catheter devices, such as X-ray transmissive PTFE catheters, needle size markings on the connection cone and so-called Luerlok systems, can also be used in the device according to the invention. The device can also be manufactured in conventional size classes and, in addition, special applications for certain vessels, such as Vena subclavia, Versa saphena magna or Vena femoralis, are possible.

The invention will be described in more detail with reference to the accompanying drawings 1-3, which illustrate an embodiment of the invention.

Figure 1 shows the device according to the invention seen obliquely from above.

5 64289

In Figure 1, reference numeral 1 denotes a PTFE infusion catheter, 2 a grooved needle with a groove inside the catheter, made of steel and bevelled. At the other end of the catheter is a plastic manifold with a thin plastic base plate 4 on the underside, which widens towards the handle 6. The handle 6 consists of a prism tapering towards the opposite end of the catheter, the cross-sectional area of which corresponds to equilateral triangles of the same shape. In this case, however, due to the concave shapes of the large side surfaces and the convex shapes of the lower base price, the sides of the triangle have inwardly or outwardly curved lines. The handle 6 is hollow and can be made of facetically concave synthetic glass. The opposite end of the hand-positioned catheter is provided with an air-permeable membrane 7. The handle can thus be used as a blood collection chamber from the opposite end 8 of the needle tip. The handle is particularly suitable for such a purpose because, thanks to the faceted surface groove, the visibility inside the handle is good and the air in the handle penetrates through the membrane 7. At the same time, the special design of the handle allows a good hand fit of the catheter device and the person using the device is aware of the position of the cannula and needle in the vein. When the infusion catheter 2 is inserted, the needle 1 is withdrawn from the catheter 2 and the distributor 3, whereby the latter straight tube is closed by means of a self-sealing rubber seal 5. Attached to the connecting piece 11 is a highly flexible plastic connecting hose with a Luer female cone 1C connected at one end, which is intended to be connected directly to the seasonal hose of the storage tank ρυ r.

Figure 2 is a rear view of the device of Figure 1.

Figure 3 shows a section through the cannula 1 and the needle 2. This figure shows a longitudinal groove 12 in the outer wall of the needle 1, the purpose of which is to guide the infusion fluid through the catheter end 8 into the handle 6 when making a straight puncture.

Claims (5)

6 64289 An infusion catheter device comprising a dispenser (3) having a side-opening connection piece (11) for connecting an infusion container thereto with a needle (2) in place, characterized in that the distributor (3) has a puncture needle ( 2) the outer wall is provided with a longitudinal groove (12). Device according to Claim 1, characterized in that the needle (2) supports a catheter (1) inside the distributor (3) which terminates in front of the mouth of the connecting piece (11). Device according to Claim 1 or 2, characterized in that the opposite end of the tip of the needle (2) is provided with a handle (6) which consists of a hollow polygonal shaped in one piece. Device according to one of Claims 1 to 3, characterized in that the opposite end of the tip of the needle (2) extends through a self-sealing sealing plate (5) which closes the corresponding end of the distributor (3). Device according to one of Claims 1 to 4, characterized in that the underside of the manifold (3) is provided with a flat base plate (4).