fig1 shows a schematically simplified blood circuit 100 which is inserted in a section of a blood or plasma treatment apparatus 200 by which the method according to the present invention takes place . the section of the blood or plasma treatment apparatus 200 encompasses in the embodiment as illustrated here a blood pump 3 by which the blood circuit 100 is filled with priming solution for its priming in addition to a control device 1 according to the present invention . the blood circuit 100 , which in fig1 is only illustrated in parts hereof , encompasses a return line 5 ( also denoted as venous line ) with a return connector 7 ( also denoted as venous patient connector ) for returning blood to the patient , who is not illustrated here , during the blood treatment . a calcium line 9 as an example of a line for adding a medical solution which is or can be fed out of the calcium solution container 11 with which it is connected by a calcium solution connector 13 or will be connected in case of need is in fluid connection with the return line 5 . the calcium solution connector 13 may be embodied as or comprise a spike . the calcium solution connector 13 may be embodied as or comprise a ventilation device . the calcium line 9 comprises a calcium drip chamber 15 and is inserted in or arranged at a calcium drip and level detector device 17 of the blood or plasma treatment apparatus 200 , in particular in the area of the calcium drip chamber 15 . the calcium line 9 is connected in unhindered fluid connection with the return line 5 at a connection point with a connection section 19 . another section of the calcium line 9 , which is arranged in or at a calcium pump 21 of the plasma or blood treatment apparatus 200 , is denoted as pump tube section 23 . the pump tube section 23 is in fig1 not inserted in the calcium pump 21 ; it rather hangs freely or loosely . its lumen is in this state not narrowed by the calcium pump 21 . the calcium solution which is stored in the calcium solution container 11 is only used in case of need . when priming the blood circuit 100 , the priming solution is anterogradely , i . e . in the direction of the arrows ra , through the return line 5 , conveyed along the return line 5 via the blood pump 3 of the blood or plasma treatment apparatus 100 . at the connection section 19 , it retrogradely enters the calcium line 9 and flows in the direction towards the calcium solution container 11 . the calcium line 9 is thus retrogradely filled in the direction of the arrows rr . filling the calcium line 9 takes place in retrograde direction according to the present invention , as described above , and along the arrows r r in fig1 . the opposite direction , denoted as anterograde direction , is illustrated in fig1 through the arrows r a . “ anterograde ” thus denotes in contrast hereto the flow direction of the calcium solution originating from the calcium solution container 11 to the connection section 19 . priming or filling the calcium line 9 thus takes place during priming of the rest of the blood circuit 100 or in the same step . it is carried out by utilization of the blood or plasma treatment apparatus 100 , in particular before the end or completion of the priming procedure of the blood circuit 100 . priming takes place using the priming solution , with which also the blood circuit 100 was primed , and it takes place in retrograde direction , as with the calcium line 9 . when the calcium line 9 is retrogradely filled or primed , it is possible that the priming solution flows within the calcium line 9 just by utilization of gravity or by utilization of the principle of communicating tubes or vessels . alternatively or supportively , the priming solution may be conveyed by use of a conveying pump — such as , for example , the blood pump 3 or a calcium pump 21 which conveys in reverse . the pump tube section 23 of the calcium line 9 is in some embodiments according to the present invention during or at the beginning of priming , which for example takes place by use of 0 . 9 % nacl solution , not connected with or inserted in the calcium pump 21 , at least not before priming of the calcium line 9 is also initially completed , disrupted or modified . this way , an unhindered flow of the liquid through the calcium line 9 is ensured . in doing so , the pump tube section 23 can be held at the calcium pump 21 , in particular a holding apparatus of the calcium pump 21 , by utilization of a clip , whereby or while the pump tube section 23 is not inserted in the calcium pump 21 . for the approach as described above for priming the calcium line 9 , escaping of air from the calcium line 9 is enabled , for example via the calcium solution connector 13 , or by utilization of an air separator which is not shown here and as is known from the state of the art , and / or by leaving the connection of the calcium line 9 with the calcium solution container 11 open . only in the case of need , for example if a hypercalcemy of the patient occurs , the calcium solution container 11 is then connected to the calcium line 9 by utilization of the calcium solution connector 13 . the calcium solution container 11 is only opened or started in the case of need . if a calcium substitution is not required , the calcium solution container stays untouched and can be used in a later occurring treatment session . a clamping device 25 may be closed during filling of the calcium line 9 . thus , reaching a predetermined detection level 27 ( illustrated with dashed line ) in the calcium drip chamber 15 can be accelerated . filling the calcium line 9 is automatically or manually stopped when the predetermined detection level 27 is reached . to ensure a desired after - priming level 31 ( see fig3 ), the calcium line 9 is filled with a predetermined volume of liquid . in the calcium drip chamber 15 , a level 29 is thus reached which is above the detection level 27 . this is shown in fig2 . fig3 shows that the pump tube section 23 meanwhile is inserted into the calcium pump 21 , it is not hanging any more — other than in the first and second method steps as shown in fig1 and fig2 . due to the insertion , the level 29 in the calcium drip chamber 15 ( see fig2 ) has dropped to the after - priming level 31 , a level which is always recognizable for the user and thus easy to monitor . this after - priming level 31 is above the predetermined detection level 27 . the user may thus check with one glance whether the calcium line 9 is available and sufficiently primed . 15 calcium drip chamber of the calcium drip and level detector device 17
the present invention relates to a method for priming a line for adding a medical solution , the line branching off a return line of an extracorporeal blood circuit , in particular a calcium line , a control device for controlling or regulating the method according to the present invention and a blood or plasma treatment apparatus with at least the control device according to the present invention . it further relates to a digital storage medium , a computer program product as well as a computer program .