Now something to craft for Christmas:
I really like Levemir and the NovoPen but sometimes the routine of the 12 hour regime goes over my head. I have that many images of shots in my head and the process of shooting is highly automated. Thus once in a year I can not tell if I have already applied my shot for the night or not. So I will set my alarm clock to 4am and will check if the BG has risen or not. If it has risen I will apply Levemir and correct with NovoLog. So the costs of this mishap are pretty high.
At the last Diabetes fair I have seen the HumaPen Memoir. This Pen can remember the last 16 doses. This way you can check the memory of the Pen if you are unsure about your shot. Sadly I found out that only insulin vials made by Lilly will fit into this pen. After a short inspection I was pretty convinced that this is not the last word here. I bought one HumaPen Memoir and the solution was simple:
a) if you remove the cap from the vial by Novo they will fit into the HumaPen without problems. I must admit that the removal is not that easy but with a sharp knife and some patience it can be done:
b) but fitting alone is not enough. The Lilly vials are an estimated Millimeter shorter than the Novo vials. This one Millimeter will cause the HumaPen to block the insulin stamp/foot. I think this is intentionally designed this way to prevent the use of other vials. Now the solution is to create one ring of metal that will make the HumaPen longer. Every Metal Fabrication Shop that is specialized on CNC Machining, Milling and Turning can create this ring for you. Here are the dimensions in metrical units (Millimeters):
c) you just insert the ring between the vial holder and the lower part of the pen. The final result will look like this:
Negative side effects: the ring will make the pen 2 Millimeters longer. The insulin stamp can not bridge this gap and therefore you will have up to 2 Millimeters of insulin left when the stamp reaches the end. Maybe this can be achieved with a ring that is smaller than 2 Millimeters but I will leave it up to you to find that out.
Disclaimer: please be aware that this is a modification that can violiate the guarantee of the HumaPen Memoir. Furthermore it is a modification that changes the way this Pen was designed to work. Therefore you will apply these modifications on your own risk.
So do not try this at home and happy shooting