Abstract: A catheter set for forming catheter arrangements includes a capillary with a capillary tube and a capillary attachment joined to the capillary tube, a cannula with a cannula tube insertable into the capillary tube, a cannula attachment joined to the cannula tube and connectable to the capillary attachment, a catheter hose advanceable through the capillary tube, a catheter coupling for fastening to the catheter hose, and a fluid admission line with a hose and at least one fluid connector joined to the hose and which is connectable to the capillary attachment. A first catheter arrangement, which has the catheter hose and catheter coupling fastened to the catheter hose, is configured for dispensing anaesthetic via the catheter hose. A second catheter arrangement, which has the capillary and the fluid admission line, is connected to the capillary attachment by the fluid connector and configured for dispensing anaesthetic via the capillary tube.

Abstract: A catheter arrangement for use in peripheral regional anaesthesia includes a capillary with a capillary tube, a capillary attachment joined to the capillary tube, and a catheter hose which is pushed through the capillary attachment into the capillary tube. An end of the catheter hose protrudes from an end of the capillary tube by an axial length. A fixing device includes an actuation element and a clamping element mounted on the capillary attachment. The actuation element is mounted on the capillary attachment movably relative to the capillary attachment and operatively connected to the clamping element in a force-transmitting and/or movement-transmitting manner. The clamping element can be transferred between a clamping configuration, in which an axial mobility of the catheter hose is fixed, and an enabling configuration, in which the action is cancelled and the axial mobility of the catheter hose is enabled.