22 can slide through holes 40 a and 40 b 0059 fig7 shows an isolated sleeve 22 having slots 45 a and 45 b 45 b is not shown but positioned directly opposite to slot 45 a on the other side of sleeve 22 and opening 23 radially extending connecting members 42 a and 42 b respectively slide through slots 45 a and 45 b 0060 fig8 shows a cartridge injection device 1 including a housing 10 having a proximal and a distal end the distal end of housing 10 has at least one hole and for example two holes 40 a and 40 b partially separating the two parts of the distal end as best seen in fig1 needle 12 is attached to the distal end the housing 10 can be made from a suitably rigid material such as glass plastic metal and the like the needle 12 is hollow and double ended wherein its distal end remaining outside housing 10 has a point capable of piercing the skin of a subject and its proximal end remaining within housing 10 is capable of piercing septum cap 17 and septum plunger 30 of the cartridge or tube 11 on the proximal end of housing 10 is a flange 28 to assist in injection the removal of device 1 from the subject following injection is assisted by extension of sleeve 22 a sleeve 22 surrounds needle 12 so that.