Insulin syringe unit conversion: difference between revisions
Diff·revision 28 → 29·18:00, 11 Apr 2025
Difference between revision 28 and revision 29 of Insulin syringe unit conversion. 14 lines changed; the page grew by 780 bytes.
| Revision 28 — 21:56, 4 Apr 2025 ArchiveBot (talk) bot: flag bare reference 3,664 bytes ±0 | Revision 29 — 18:00, 11 Apr 2025 Ref_Desk_Ron (talk) add table 4,444 bytes +780 | ||
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| 13 | }} | 13 | }} |
| 14 | {{hatnote|For the syringe itself, see [[Insulin syringe]]. For dissolving a vial, see [[Reconstitution calculator]].}} | 14 | {{hatnote|For the syringe itself, see [[Insulin syringe]]. For dissolving a vial, see [[Reconstitution calculator]].}} |
| + | 15 | {{technical|date=January 2026|talk=Is the U-40 material needed at all?}} | |
| 15 | 16 | ||
| 16 | An '''insulin syringe unit''' is a graduation on a syringe barrel calibrated for insulin of a stated concentration. On the U-100 scale, which is the international standard for human insulin, 100 units correspond to exactly 1 millilitre, so one unit is 0.01 mL.{{r|iso8537}} The unit is therefore a '''volume''', and the mass of any substance it contains depends entirely on the concentration of the solution in the barrel. | 17 | An '''insulin syringe unit''' is a graduation on a syringe barrel calibrated for insulin of a stated concentration. On the U-100 scale, which is the international standard for human insulin, 100 units correspond to exactly 1 millilitre, so one unit is 0.01 mL.{{r|iso8537}} The unit is therefore a '''volume''', and the mass of any substance it contains depends entirely on the concentration of the solution in the barrel. |
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| 37 | 38 | ||
| 38 | A reader who transfers a "20 unit" figure from a U-100 context to a U-40 syringe delivers 0.5 mL instead of 0.2 mL. Reports of this error in the veterinary and human literature are consistent enough that colour-coded caps — orange for U-100, red for U-40 — are conventional.{{r|fdavet}} | 39 | A reader who transfers a "20 unit" figure from a U-100 context to a U-40 syringe delivers 0.5 mL instead of 0.2 mL. Reports of this error in the veterinary and human literature are consistent enough that colour-coded caps — orange for U-100, red for U-40 — are conventional.{{r|fdavet}} |
| + | 40 | ||
| + | 41 | == Mass per unit at common concentrations == | |
| + | 42 | Because a unit is a fixed volume, the mass it contains scales linearly with concentration. The table below is the whole of the arithmetic, on the U-100 scale. | |
| + | 43 | ||
| + | 44 | |+ Mass delivered per U-100 unit (0.01 mL) | |
| + | 45 | | Concentration | Per unit | 5 units | 10 units | 20 units | 40 units | | |
| + | 46 | |---|---|---|---|---|---| | |
| + | 47 | | 0.5 mg/mL | 5 µg | 25 µg | 50 µg | 100 µg | 200 µg | | |
| + | 48 | | 1 mg/mL | 10 µg | 50 µg | 100 µg | 200 µg | 400 µg | | |
| + | 49 | | 2.5 mg/mL | 25 µg | 125 µg | 250 µg | 500 µg | 1.0 mg | | |
| + | 50 | | 5 mg/mL | 50 µg | 250 µg | 500 µg | 1.0 mg | 2.0 mg | | |
| + | 51 | | 10 mg/mL | 100 µg | 500 µg | 1.0 mg | 2.0 mg | 4.0 mg | | |
| + | 52 | | 20 mg/mL | 200 µg | 1.0 mg | 2.0 mg | 4.0 mg | 8.0 mg | | |
| 39 | 53 | ||
| 40 | == References == | 54 | == References == |