Syringe dead space: difference between revisions
Diff·revision 39 → 40·21:19, 26 Jan 2026
Difference between revision 39 and revision 40 of Syringe dead space. 3 lines changed; the page grew by 495 bytes.
| Revision 39 — 11:44, 22 Jan 2026 TrialsTabitha (talk) fix unit 18,519 bytes +846 | Revision 40 — 21:19, 26 Jan 2026 ArchiveBot (talk) bot: sort category members 19,014 bytes +495 | ||
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| 126 | * '''Extended plunger tip.''' The plunger tip carries a projection that enters the hub. Values are intermediate and depend on the fit achieved. | 126 | * '''Extended plunger tip.''' The plunger tip carries a projection that enters the hub. Values are intermediate and depend on the fit achieved. |
| 127 | 127 | ||
| + | 128 | Trade-offs are documented. Permanently attached needles cannot be exchanged between withdrawal and injection, which is inconvenient when a wide-bore needle is wanted for withdrawal from a stoppered vial and a fine one for injection. Fine permanently attached needles are also slower to draw viscous liquids and are more easily bent or blunted by passage through an elastomeric closure, a route by which [[Multi-dose vial|stopper coring]] becomes more likely.{{r|who2015}} | |
| + | 129 | ||
| 128 | == Measurement and standards == | 130 | == Measurement and standards == |
| 129 | Dead space is not itself a specified parameter in the principal device standards. ISO 7886-1 specifies the graduated capacity, the tolerance on delivered volume, dimensional requirements, freedom from leakage and the force required to operate the plunger; ISO 8537 does the equivalent for insulin syringes; ISO 7864 covers needles and ISO 9626 the stainless-steel tubing from which they are made. None sets a maximum retained volume, and none requires it to be declared.{{r|iso7886,iso8537,iso7864,iso9626}} | 131 | Dead space is not itself a specified parameter in the principal device standards. ISO 7886-1 specifies the graduated capacity, the tolerance on delivered volume, dimensional requirements, freedom from leakage and the force required to operate the plunger; ISO 8537 does the equivalent for insulin syringes; ISO 7864 covers needles and ISO 9626 the stainless-steel tubing from which they are made. None sets a maximum retained volume, and none requires it to be declared.{{r|iso7886,iso8537,iso7864,iso9626}} |
| ⋮ | ⋮ | ||
| 157 | * [[Reconstitution calculator]] | 159 | * [[Reconstitution calculator]] |
| 158 | * [[Multi-dose vial]] | 160 | * [[Multi-dose vial]] |
| + | 161 | * [[Sharps disposal]] | |
| 159 | 162 | ||
| 160 | {{DEFAULTSORT:Syringe dead space}} | 163 | {{DEFAULTSORT:Syringe dead space}} |