Connector for dialysis port

Abstract

A connector for connecting a dialysate port of a dialyzer with a dialysate-carrying line and a dialyzer. The connector has a recess with a shift element on the end which accommodates the dialyzer port. The shift element is accommodated in the recess and is displaceable between a first position and a second position perpendicular to the direction of the lumen on the first end. The shift element does not pass through the lumen in the first position. In the second position, the lumen is constricted so that the connector with the shift element can be placed on the dialysate port and the connector locked on the dialysate port by means of an undercut thereon.

1 . A dialyzer in combination with a connecting device comprising:
 a dialyzer having a dialysate port; and   a connector configured to connect said dialysate port of said dialyzer to a dialysate-carrying line, said connector having a first lumen and a second lumen passing therethrough, a first end of the connector surrounding the first lumen and configured to accommodate the dialysate port in the first lumen, a second end of the connector surrounding the second lumen and configured for being connected to the dialysate-carrying line, said connector first end having a recess with a shift element accommodated in the recess such that the shift element is displaceable between a first position and a second position perpendicular to the direction of the first lumen in the connector first end, said shift element in the first position not penetrating through the first lumen of the connector first end and in the second position, said shift element narrowing the first lumen so that the connector with the shift element is placed on the dialysate port in the first position and in the second position the connector can be locked on the dialysate port by means of an undercut on said port.   
   
   
       2 . The connector according to  claim 1 , wherein the connector includes not only the shift element but also a base body which is composed of two interconnected essentially cylindrical sleeves, the first sleeve being the first end and the second sleeve being the second end. 
   
   
       3 . The connector according to  claim 2 , wherein an outside diameter of the first sleeve is greater than an outside diameter of the second sleeve. 
   
   
       4 . The connector according to  claim 2 , wherein the first lumen in the first sleeve has a larger diameter than the second lumen in the second sleeve. 
   
   
       5 . The connector according to  claim 2 , wherein the connector is provided with a stop for the dialyzer port in the connecting area of the two sleeves. 
   
   
       6 . The connector according to  claim 5 , wherein a sealing element for sealing the connector with respect to the dialyzer port is provided on the inside wall of the first sleeve near the stop. 
   
   
       7 . The connector according to  claim 1 , wherein a constriction area in at least one of the lumens is provided between the first end and the second end. 
   
   
       8 . The connector according to  claim 1 , wherein the recess consists of two opposite recesses. 
   
   
       9 . The connector according to  claim 8 , wherein the shift element has a first opening which does not constrict the first lumen in the first end in the first position and has a second opening which is connected to the first opening in the direction of shifting and which constricts the first lumen in the first end in the direction of the recesses in the second position. 
   
   
       10 . The connector according to  claim 9 , wherein the first opening has a round shape and the second opening has an elongated shape so that the overall shape is that of a keyhole. 
   
   
       11 . The connector according to  claim 10 , wherein the first opening has catch projections which can engage with complementary recesses on the first end of the connector for engaging the shift element in the first position. 
   
   
       12 . The connector according to  claim 11 , wherein the complementary recesses are additionally provided symmetrically on the first end of the connector on the opposite side of the first lumen in the direction of shifting. 
   
   
       13 . The connector according to  claim 10 , wherein the second opening is provided with an expanded opening area perpendicular to the direction of shifting for accommodating the dialyzer port for engagement of the shift element in the second position. 
   
   
       14 . The connector according to  claim 10 , wherein the elongated border of the second opening has a wall thickness that tapers with a slope toward the opening and has a form-fitting engagement with a corresponding slope on the undercut of the dialyzer port. 
   
   
       15 . A dialyzer in combination with a connecting device comprising:
 a dialyzer having a dialysate port configured to be coupled to a Hansen coupling; and   a connector configured to connect said dialysate port of said dialyzer to a dialysate-carrying line, said connector having a first lumen and a second lumen passing therethrough, a first end of the connector surrounding the first lumen and configured to accommodate the dialysate port in the first lumen, a second end of the connector surrounding the second lumen and configured for being connected to the dialysate-carrying line, said connector first end having a recess with a shift element accommodated in the recess such that the shift element is displaceable between a first position and a second position perpendicular to the direction of the first lumen in the connector first end, said shift element in the first position not penetrating through the first lumen of the connector first end and, in the second position, said shift element narrowing the first lumen so that the connector with the shift element is placed on the dialysate port in the first position and in the second position the connector can be locked on the dialysate port by means of an undercut on said port, said dialysate port when receiving said connector remaining in said same configuration in which said port is coupled to a Hansen coupling.   
   
   
       16 . The combination according to  claim 15 , wherein the connector includes not only the shift element but also a base body which is composed of two interconnected essentially cylindrical sleeves, the first sleeve being the first end and the second sleeve being the second end, an outside diameter of the first sleeve is greater than an outside diameter of the second sleeve. 
   
   
       17 . The combination according to  claim 15 , wherein the recess includes two opposite recesses and the shift element has a first opening which does not constrict the first lumen in the first end in the first position and has a second opening which is connected to the first opening in the direction of shifting and which constricts the first lumen in the first end in the direction of the recesses in the second position. 
   
   
       18 . The combination according to  claim 17 , wherein the first opening has a round shape and the second opening has an elongated shape so that the overall shape is that of a keyhole, said first opening having catch projections which can engage with complementary recesses on the first end of the connector for engaging the shift element in the first position. 
   
   
       19 . The combination according to  claim 18 , wherein the second opening is provided with an expanded opening area perpendicular to the direction of shifting for accommodating the dialyzer port for engagement of the shift element in the second position. 
   
   
       20 . The combination according to  claim 18 , wherein the elongated border of the second opening has a wall thickness that tapers with a slope toward said opening and has a form-fitting engagement with a corresponding slope on the undercut of the dialyzer port.