DE8913761U1 - Endoscopic fibrin glue injection device - Google Patents

Description

Endoscopic fibrin glue injection device

The invention relates to an endoscopic fibrin glue injection device for injecting two-component fibrin glue, with a catheter by means of a Injection hollow needle that can be moved in the handle and on which two syringe coupling connections are formed.

Such fibrin glue injection devices are available on the market

known, which can be classified into two types. In one type, the hollow injection needle is connected to a tube that opens into a chamber in the handle, into which the channels of the two syringe coupling connections open. By operating the two Using syringes, the two fibrin glue components are simultaneously introduced into the chamber and from there into the tube, in which they are supposed to mix until they reach the hollow injection needle. On the one hand, however, thorough mixing of the two components is not guaranteed and On the other hand, there is a risk that the The mixture of components hardens until it reaches the hollow injection needle, thereby clogging the tube. The other device type therefore uses a double-barrelled hollow injection needle, the two lumens of which are each a tube connected to the syringe coupling connections, with the two tubes running next to each other in the catheter. However, the double-barreled injection needle must be relatively thick and a good mixing of the two adhesive components is also not possible. guaranteed because the components can only come together within the tissue to be treated after they exit the hollow injection needle.

The invention solves the problem of

To create an injection device of the type mentioned above and to design it in such a way that a thorough mixing of the two adhesive components is achieved without the risk of premature hardening of the adhesive.

I This is achieved according to the invention in that the single-barrel

I hollow injection needle is connected to a first tube,

i in which a second hose with smaller outer diameter

i - 5 as the inner diameter of the first hose coaxial in

I this runs to the handle, whereby the second

f hose opens out a short distance from the proximal end of the ! hollow injection needle and the hoses in the ^: handle are each connected to one of the syringe coupling connections r 10.

'■-rt ■

I In this way, the two adhesive components

each separately to the hollow injection needle and v there, before they enter the hollow injection needle, I 15 brought together and mixed thoroughly until they emerge from the ■'': hollow injection needle. This is therefore done L close to the hollow injection needle and in the hollow injection needle itself, whereby jt premature hardening of the fibrin glue is avoided and I? at the same time mixing of the components before they emerge from I 20 the hollow injection needle into the tissue to be treated

The single-barreled hollow injection needle can be sufficiently thin ;· _: so that no complications can arise when injecting the fibrin glue.

if: 25 In the device according to the invention, the inner tube

(directly to the assigned syringe coupling connection, whereas the outer hose in the handle is inserted into a hole

!' or chamber to which the second syringe : coupling connection is connected.

Although the outer tube can be fixed directly to the outer circumference of the hollow injection needle and the inner tube can freely open into the outer tube, it is preferred to fix the hollow injection needle to a sleeve fixed in the first tube, in which the second

! Hose ends.

The invention is explained using an embodiment which

at least schematically shown in the drawing. In the drawing:

FIG. 1 is a side view of the fibrin glue injection device and

FIG. 2 a partial longitudinal section in the area of ||

Injection needle in enlarged scale. I

The fibrin glue injection device shown has a T-shaped handle 2, which can be moved in a handle sleeve 10 via a sliding sleeve 9 attached to it, at the end of which facing away from the handle 2 a flexible tubular catheter 1 is fixed. In the distal end of the catheter 1 a hollow injection needle 3 can be moved by moving the sliding sleeve 9 in the handle sleeve 10. By pushing the sliding sleeve 9 into the handle sleeve 10 the hollow injection needle 3 can be pushed out of the distal end of the catheter 1. For this purpose the hollow injection needle 3 is extended by a sleeve 8, on which the distal end of a first tube 4 is fixed, the proximal end of which is anchored in the handle 2. The distal end of a second inner tube 5 opens freely into the sleeve 8, the outer diameter of which is smaller than the inner diameter of the outer tube 2 and which runs coaxially in the latter to the handle 2. Here, the inner tube 5 is connected to a first syringe coupling connection 6, whereas the outer tube opens into a transverse chamber 11, through which the first tube 4 runs and into which a second syringe coupling connection 7 opens.

The syringes (not shown) are filled with the fibrin glue components, which are then pumped into the respective associated tube 4, 5 after coupling the syringes with the syringe coupling connections 6 and 7 while simultaneously operating the syringe pistons and meet closely at a distance in front of the hollow injection needle 3 in the sleeve 8;

and are then mixed together until they exit the hollow injection needle 3.

Claims (2)

Expectations 1. Endoscopic fibrin glue injection device for Injecting two-component fibrin glue with a hollow injection needle that can be moved in a catheter by means of a handle and on which two syringe coupling connections are formed, characterized in that the hollow injection needle (3) is connected to a first tube (4) in which a second tube (5) with a smaller outer diameter than the inner diameter of the first tube (4) runs coaxially in the latter up to the handle (2), the second tube (5) opening out a short distance in front of the proximal end of the hollow injection needle (3) and the tubes in the handle (2) are each connected to one of the syringe coupling connections (6, 7). 2. Injection device according to claim 1, characterized characterized in that the hollow injection needle (3) is fixed to a sleeve (8) fastened in the first tube (4), in which the second tube (5) ends.