The needle of an insulin pen is a necessary equipment for subcutaneous insulin injection. In principle, one needle should be replaced after each injection. However, in clinical practice, some patients may consider the economic situation or feel that this may be a waste. One needle is reused multiple times, and even replaced until the needle becomes blunt or bent. This situation can easily cause some adverse reactions, such as increased pain during injection Needle hole infection or even needle breakage under the skin.
So it is recommended to change the needle for each injection. If the needle is not replaced in a timely manner due to certain reasons, the maximum usage time of a needle should not exceed 3 days. In addition, before each subcutaneous injection, it is necessary to check whether the needle is unobstructed. Usually, after adjusting the insulin dosage to 1-2 units, press the injection button. If there is a small amount of insulin leakage from the needle, it indicates that the needle is unobstructed. If there is still no insulin leakage after exhaust, the needle should be checked in a timely manner. If there is a discount, it should be replaced in a timely manner