Using an insulin pen offers a convenient and precise method for managing diabetes. These devices resemble a writing pen but contain an insulin cartridge and a disposable needle, allowing for easy self-administration of insulin doses. Before each injection, a process known as “priming” the insulin pen is necessary. Priming involves expelling a small amount of insulin from the pen to ensure it is ready for an accurate and effective dose.
Why Priming is Essential
Priming an insulin pen ensures accurate and safe insulin delivery. The primary reason for this step is to remove any air bubbles that may have accumulated within the insulin cartridge or needle. Air bubbles can form due to temperature changes, atmospheric pressure shifts, or pen movement. If these air bubbles are not expelled, they can take up space meant for insulin, leading to an under-delivery of the intended dose.
Beyond removing air, priming also confirms that the pen and its attached needle are functioning correctly. It verifies that the needle is properly attached, is not clogged, and that the pen’s internal mechanism is not jammed. Skipping this step can result in inconsistent dosages, delivering less insulin than prescribed, which can negatively impact blood sugar management. Unprimed pens might deliver up to 10% less insulin than properly primed ones, affecting precise blood sugar levels.
Priming Your Insulin Pen: A Step-by-Step Guide
Priming an insulin pen involves straightforward actions. Begin by attaching a new, sterile needle to the insulin pen. After securing the needle, remove both the outer and inner protective caps, discarding the inner cap while keeping the outer cap for safe needle disposal later.
Next, prepare the pen by dialing up a small test dose. Set the dose knob to 2 units of insulin, or 3 units if recommended by the manufacturer. Hold the pen upright with the needle pointing towards the ceiling.
With the pen oriented upward, firmly press the injection button all the way in until the dose counter returns to zero. As you press, observe the tip of the needle for a small drop, or stream, of insulin. The appearance of insulin confirms that air has been expelled and the needle is clear. If no insulin appears, repeat the priming process by dialing up 2 units and pressing the injection button again. Continue until a drop of insulin is visible at the needle tip, indicating the pen is primed and ready for your prescribed dose.
Troubleshooting Priming Issues
Occasionally, issues may arise when priming your insulin pen. A common problem is the absence of an insulin drop at the needle tip even after multiple priming attempts. This could indicate an air lock, a clogged needle, or a near-empty insulin cartridge. If insulin does not appear after repeating priming, remove the current needle, attach a new one, and re-attempt the process.
If a new needle does not resolve the issue, or if the pen’s dose knob is difficult to push, the pen itself might be faulty or jammed. This can be due to internal damage or a problem with the plunger. Avoid forcing the pen, as this can worsen the problem or lead to inaccurate dosing. Discard the problematic pen and use a new one. If persistent issues arise, consulting a healthcare professional is recommended to ensure proper insulin delivery.