CATHETER, IN PARTICULAR FOR PERITONEAL DIALYSIS

摘要

Catheter, particularly intended for peritoneal dialysis, comprising a proximal end arranged for connection with a supply and removal arrangement for peritoneal dialysis liquid, and a distal end which is intended to be placed into the peritoneal cavity and provided with a plurality of holes (21, 22) as well as a tip opening (17). The tip is provided with an insert (18) consisting of a restriction (19) and a diffusor (20). The flow which passes out through the tip opening is thereby reduced to 20 % - 25 % of the total flow, while the outflow speed is kept low due to the diffusor. A restriction (26) may be positioned along the portion of the catheter provided with holes at about two-thirds the distance of the vented catheter region measured from the tip opening. The holes in the sidewall of the catheter may comprise different dimensions so that the holes (21) closest to the tip have a small diameter, while the holes (22) near the restriction (26) comprise a larger cross-sectional area. The holes (21) which are closest to the restriction seen from the tip again have the smaller cross-sectional area, followed by holes (22) with larger cross-sectional area. In this way, approximately the same outflow speed is obtained through the different holes as well as through the tip opening.