This is a quantitative study that aims to describe difficulties related to self-administration of insulin in patients with diabetes mellitus type 2 followed in tertiary service. We know that proper treatment is the main factor associated with the control of the disease and prevention of possible complications, in order to do that, the correct learning of proper handling technique and application of insulin are required. However, even in patients that use insulin for a long time, it is often the ignorance of these techniques, which contributes to an inappropriate application of the medicine and interferes with the effectiveness of the treatment. In addition to the technical ignorance of the use of insulin, other factors such as visual, motor and neurological deficits also represent major barriers to proper self-administration and should be investigated by the professional before the guidance of self-administration. For this reason, this work will enumerate these barriers in order to know the main failure and difficulty of patients in insulin therapy.
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