MARK SYKES / SCIENCE PHOTO LIBRARY MARK SYKES / SCIENCE PHOTO LIBRARY
Insulin pen. This is Innolet a pre-filled injection device used by diabetics. It features a dial for metering out the correct dose of insulin. The dial on this device is larger than on others and is for use by those with limited dexterity, for example patients with arthritis. Once all the insulin in the cartridge has been used the device can be thrown away.
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