An insulin pen delivers a measured dose of insulin through a small needle injected just under the skin. Here's a detailed breakdown of how it works, incorporating information from the provided reference:
How an Insulin Pen Functions
Insulin pens are designed to be user-friendly, portable, and convenient for people who need to inject insulin regularly. They consist of several key components working together:
- Insulin Cartridge: A pre-filled cartridge or vial of insulin is housed inside the pen.
- Dose Selector: A dial or button allows the user to select the exact amount of insulin needed.
- Injection Button: This button, when pressed, delivers the selected insulin dose.
- Needle: A disposable needle is attached to the pen before each injection. This needle is very small and designed for subcutaneous (under the skin) injection.
Step-by-Step Injection Process
- Attach a New Needle: Before each injection, a new disposable needle is screwed onto the pen. This is crucial for hygiene and to ensure the needle is sharp, minimizing discomfort.
- Prime the Pen: The pen is primed by dialing a small dose and injecting it into the air to remove air bubbles and ensure proper insulin flow.
- Select the Dose: The dial on the pen is used to select the prescribed dose of insulin.
- Inject: The needle is inserted into a chosen injection site (typically in the abdomen, thigh, or upper arm).
- Press the Injection Button: The injection button is pressed to deliver the insulin dose.
- Hold and Withdraw: As mentioned in the reference, it's important to hold the injection button down for six to ten seconds after pressing to ensure all insulin is injected. Afterward, pull the needle out.
- Bleeding Management: If a small amount of bleeding occurs at the injection site, apply pressure with a clean alcohol wipe or cotton ball.
- Safely Dispose of the Needle: The needle must be carefully removed and disposed of in a sharps container.
Key Insights from the Reference
The reference video emphasizes the following essential aspects of insulin pen use:
- Holding Time: The importance of holding the injection button down for six to ten seconds is crucial to ensure the full dose of insulin is administered and not leaked out.
- Bleeding: Minor bleeding is common after injections and can be easily managed with pressure using a clean alcohol wipe or cotton ball.
Benefits of Insulin Pens
Insulin pens offer several advantages over using vials and syringes:
- Convenience: They are portable and easy to use on the go.
- Accuracy: They allow for precise dosing, which is essential for blood sugar control.
- Ease of Use: They are user-friendly, even for those with dexterity issues.
- Reduced Risk of Errors: Pre-filled cartridges minimize the risk of errors in dosage calculation.
| Feature | Description |
|---|---|
| Insulin Delivery | Delivers a precise dose of insulin via a disposable needle. |
| Dose Selection | Allows user to select a specific insulin dosage. |
| Injection | A button is pressed to deliver insulin after needle insertion. |
| Holding time | Hold button down for 6-10 seconds as per the reference for a full dose. |
| Bleeding | Managed with an alcohol wipe or cotton ball. |
| Portability | Compact and designed for easy carrying. |
