Device for the osteosynthesis of bones

Claim 1

Device for the fixed osteosynthesis of bones by the intra-marrowial method, having - a tube (2) made of a non-elastic, strong but pliable and biologically inert, sterilizable material, provided to be inserted into the marrow cavity of a bone (1), one end (2') being sealed, and the other end being open, and - a connection part (13), comprising - a fixation part (4) designed to be firmly inserted into the open end of the tube (2) for the fixation of the tube (2) in an access hole of the bone (1) to the marrow cavity and for a tight connection with the tube (2), and - a vent part (12) designed to be firmly inserted into the fixation part (4) and for a tight connection therewith, and comprising means (8) for connecting a line (14) for introducing a pressurized biologically inert, sterilizable or sterilized liquid (10) into the tube (2) and releasing it therefrom, and valve means (9) for opening and closing the liquid passage therethrough, preferably a returnable ball vent.

Claim 5

The device according to one or several of claims 1 to 4, characterized in that the fixation part (4) comprises an internal thread (5), and the vent part (12) comprises an external thread (6) fitting into the internal thread (5) of the fixation part (4), the vent part (12) preferably being provided with a slot groove (7) at its outer end.

Claim 6

The device according to one or several of claims 1 to 5, characterized in that the internal portion of the fixation part (4) and the outer portion of the vent part (12) are designed to form a bayonet joint for tight fixation of the vent part (12) in the fixation part (4).

Claim 7

The device according to one or several of claims 1 to 6, characterized in that the means (8) for connecting the liquid line (14) are an internal thread, a flange or a sleeve.

Claim 8

The device according to one or several of claims 1 to 7, characterized in that the tube (2) is made of or comprises polyethylene, polyurethane and/or polytetrafluoroethylene.

Claim 9

The device according to one or several of claims 1 to 8, characterized in that the fixation part (4) is made of a metal or a metal alloy.

Claim 10

The device according to one or several of claims 1 to 9, characterized in that it further comprises means for pressurizing and supplying and draining the liquid (10), designed to be connected via the line (14) to the vent part (12) of the connection part (13), for filling the tube (2) at a predeterminable pressure, preferably a pressure of 200 to 1000 kPa, and to be disconnected therefrom.

Claim 11

The device according to one or serveral of claims 2 to 10, characterized in that the biologically inert, sterilizable liquid (10) is water, a gelatine solution or a dextran solution, optionally comprising a radio-opaque material, preferably an iodine or an iodide solution.