System for drainage

System according to any of the previous claims, wherein the tip (5) comprises a fastening means (13), in particular a thread, adapted to connect the tip (5) with the distal end of the elongated member (7).

System according to any of the previous claims, wherein the head element (11) is tapered, in particular conically shaped.

System according to any of the previous claims, wherein the head element (11) comprises a first (14) and a second tapered (15) region, and wherein in particular

• the second tapered (15) region is tapered to adapt to a surface (17) of the tip,
• or
• wherein the head element (11) comprises a first (14) and a second tapered (15) region, wherein the first tapered region (14) is tapered to adapt to a surface (16) of the distal cannula body portion, and wherein in particular the second tapered (15) region is tapered to adapt to a surface (17) of the tip.

System according to any of the previous claims, wherein the opening (12) of the head element (11) comprises a first diameter (R1) configured to receive the tip (5) and a second diameter (R2) configured to clamp the distal end of the elongated member (7).

System according to any of the previous claims, wherein the cannula (1) comprises a ventilation opening (18) adapted to compensate for a pressure difference, such that the inside of the proximal cannula portion (3) is in fluid communication with the outside of the cannula (1).

System according to any of the claims, wherein the plug (6) comprises a filter material, in particular sintered polytetrafluoroethylene, to compensate for a pressure difference, such that the inside of the proximal cannula portion (3) is in fluid communication with the outside of the cannula (1).

System according to any of the claims, wherein the plug (6) comprises a first (23) and a second section (24), wherein the second section (24) is at least partially engaged into the proximal cannula portion (3) and comprises the proximal end of the elongated member (9) and is at least partially conically and/or cylindrically shaped.

Kit of parts, comprising

• a cannula (1), in particular for use in medical applications, with a distal cannula portion (2) and a proximal cannula portion (3), wherein the cannula (1) comprises a plurality of flexible filaments (4), such that the cannula (1) can be varied between a normal profile and a low-profile configuration, and a head element (11) arranged at the distal cannula portion (2), wherein the head element (11) comprises an opening (12),
• a mandrel (10), comprising a tip (5), a plug (6) and an elongated member (7), wherein the elongated member (7) comprises the tip (5) at its distal end (8) and the plug (6) at its proximal end (9) to form the mandrel (10), wherein the plug (6) is configured to be movable positioned at least partially into the proximal cannula portion (3), and
• wherein the opening (12) of the head element (11) is configured to partially receive the distal end (8) of the mandrel, such that positioning of the plug (6) at the proximal cannula portion (3) varies the cannula between the normal and the low-profile configuration.

Cannula, in particular for use in medical applications, with a distal cannula portion (2) and a proximal cannula portion (3), wherein the cannula comprises

• a plurality of flexible filaments (4), such that the cannula can be varied between a normal profile and a low-profile configuration, and a head element (11) arranged at the distal cannula portion (2), wherein the head element (11) comprises an opening (12) wherein the opening of the head element comprises a first diameter (R1) and a second diameter (R2).

Mandrel, for use in a cannula with a distal cannula portion and a proximal cannula portion and a plurality of flexible filaments (4), the mandrel comprising a tip (5), a plug (6) and an elongated member (7), wherein the elongated member (7) comprises the tip (5) at its distal end (8) and the plug (6) at its proximal end (9) to form a mandrel (10), wherein the plug (6) is configured to be movable positioned at least partially into the proximal cannula portion (3).