method and system for retaining a cartridge in a holder. The present invention relates to a method and system for holding a drug cartridge (1001,216,300,402,502,552,704,724,744,764,784) in a cartridge holder (1002,1008,154,202,302,400,450,700,720,740,760,780). as an example, a retention element (1003,1007,150,200,250,304,320,330,340,410,454,702,722,742,762,782) for retaining a drug cartridge (1001,216,300,402,452,502,552,704,724,744,764,784) in a cartridge holder for less than one connector 602,700,760,700,760,700 to the drug cartridge (1001,216,300,402,452,502,552,704,724,744,764,784). the at least one connecting device (204) is in an outer wall of the retaining element (1003,1007,150,200,250,304,320,330,340,410,454,702,722,742,782). the retaining element (1003,1007,150,200,250,304,320,330,340,410,454,702,722,742,762,782) additionally includes at least one retaining device (129,208,210,252,2554,1006) extending from an inner wall of the retaining element (10003,1007,150,200,250,304,754,742,742,442). when the retention element (1003,1007,150,200,250,304,320,330,340,410,454,702,722,742,762,782) is attached to the cartridge holder (1002,1008,154,202,302,400,450,700,720,740,760,780), the retention element (1003,1007,100,742,742,752,752,752,752,742,752,742,752,700,702 cartridge (1002,1008,154,202,302,400,450,700,720,740,760,780).método e sistema para reter um cartucho em um suporte. a presente invenção refere-se a um método e a um sistema para reter um cartucho de fármaco (1001,216,300,402,502,552,704,724,744,764,784) em um suporte de cartucho (1002,1008,154,202,302,400,450,700,720,740,760,780). como exemplo, um elemento de retenção (1003,1007,150,200,250,304,320,330,340,410,454,702,722,742,762,782) para reter um cartucho de fármaco (1001,216,300,402,452,502,552,704,724,744,764,784) em um suporte de cartucho (1002,1008,154,202,302,400,450,700,720,740,760,780) inclui pelo menos um dispositivo de conexão (204) para se conector ao cartucho de fáramco (1001,216,300,402,452,5
