Assembly of the instrument

1) Open the hinged lock of the instrument holder.

2) Remove the screw needle together with its cannula housing from its protective packaging and place it in the two slots in the head of the instrument holder so that the cannula’s helical hub assumes the position against the back wall of the instrument holder (Fig. D and F). Pull back the handle of the screw needle so that its screw is entirely withdrawn into the cannula.

3) Swing the hinged lock up to the locked position, thereby locking the cannula hub against the back wall of the instrument holder. The instrument is now ready for use.