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| − | Cartridges are sealed plastic containers that hold insulin for refillable [[insulin pen]]s. Most contain 3ml (300U normally) of insulin. Cartridges are made to fit only certain types of pens; if you have a [[Novo Nordisk]] pen, neither [[Eli Lilly]] nor [[Aventis]] insulin cartridges will fit it. [[Analog]], r-DNA/GE/GM and some [[CP Pharma]] bovine and porcine insulins are available in cartridge form. In Europe, 3 |
+ | Cartridges are sealed plastic containers that hold insulin for refillable [[insulin pen]]s. Most contain 3ml (300U normally) of insulin. Cartridges are made to fit only certain types of pens; if you have a [[Novo Nordisk]] pen, neither [[Eli Lilly]] nor [[Aventis]] insulin cartridges will fit it. [[Analog]], [[r-DNA/GE/GM]], and some [[CP Pharma]] [[bovine]] and [[porcine]] insulins are available in cartridge form. In Europe, 3 ml cartridges are more commonly sold than vials. |
| − | Plastic cartridges (at least according to Novo Nordisk) are actually made of glass, and coated with plastic, to avoid interaction between the insulin and the plasticizer chemicals. So essentially they are small vials. |
+ | Plastic cartridges (at least according to Novo Nordisk) are actually made of glass, and coated with plastic, to avoid interaction between the insulin and the plasticizer chemicals. So essentially they are small vials. Like a vial, you can extract insulin from them using a [[syringe]] for its greater dosage precision, though you need to remember two special rules: |
* Inject an approximately equal volume of air before drawing insulin, to equalize pressure |
* Inject an approximately equal volume of air before drawing insulin, to equalize pressure |
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* Don't replace a cartridge in a pen after using a syringe on it. |
* Don't replace a cartridge in a pen after using a syringe on it. |
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| − | [[Lente]] insulins and [[PZI]] insulins of any origin are not available in any types of cartridges because the insulins can't be resuspended for use |
+ | [[Lente]] insulins and [[PZI]] insulins of any origin are not available in any types of cartridges because the insulins can't be properly [[rolling insulin|resuspended]] for use in them. |
Revision as of 07:49, 29 December 2005
Cartridges are sealed plastic containers that hold insulin for refillable insulin pens. Most contain 3ml (300U normally) of insulin. Cartridges are made to fit only certain types of pens; if you have a Novo Nordisk pen, neither Eli Lilly nor Aventis insulin cartridges will fit it. Analog, r-DNA/GE/GM, and some CP Pharma bovine and porcine insulins are available in cartridge form. In Europe, 3 ml cartridges are more commonly sold than vials.
Plastic cartridges (at least according to Novo Nordisk) are actually made of glass, and coated with plastic, to avoid interaction between the insulin and the plasticizer chemicals. So essentially they are small vials. Like a vial, you can extract insulin from them using a syringe for its greater dosage precision, though you need to remember two special rules:
- Inject an approximately equal volume of air before drawing insulin, to equalize pressure
- Don't replace a cartridge in a pen after using a syringe on it.
Lente insulins and PZI insulins of any origin are not available in any types of cartridges because the insulins can't be properly resuspended for use in them.