Pen mechanics when the cartridge is nearly empty — setting out what I have, and where I think it stops being reliable.
Trying to work out what would count as evidence on pen mechanics, before collecting any. This is the part I usually skip and it is the part that makes the rest useful.
If two explanations predict the same observation, observing it does not help. So: what observation would separate them?
The opening post is the version of this I will quote in future. One addition.
Pen confusion between compounds: if you are using multiple pens or alternating pens, confirming you have the correct pen before injection prevents administration errors. Check the label every time.
Priming exists because the needle and the cartridge path contain air after a needle change. Skipping it means the first fraction of the dose is not liquid.
If anyone can point at the primary source I would be grateful.
| Topic | Participants | Replies | Views | Activity |
|---|---|---|---|---|
|
Why a pen's dose steps are fixed and what that costs you — one year on
Asking directly, because I could not find a straight answer: Why a pen's dose steps are fixed and what that costs you — one year on Question about a metering device rather than about a syringe, because the…
|
+30 | 34 | 2.9k | 11mo |
|
A pen that felt like it delivered nothing: diagnosing it afterwards
On the subject in the title: A pen that felt like it delivered nothing: diagnosing it afterwards Working notes rather than a conclusion. Question about a metering device rather than about a syringe, because…
|
+35 | 39 | 584 | 6mo |
|
Priming a pen and whether the primed volume is wasted — one year on
Posting this under the heading it deserves: Priming a pen and whether the primed volume is wasted — one year on Everything below is what sits behind that. I would like to disagree carefully with the settled…
|
+3 | 7 | 5.4k | 22mo |
|
Why a pen's dose steps are fixed and what that costs you
The question in the title: Why a pen's dose steps are fixed and what that costs you I will give what I have already checked below so nobody repeats it. A question about a device rather than about a compound,…
|
4 | 2.5k | 23h | |
|
Coming back to: Pen dose counters: what a click does and does not guarantee
Pen dose counters: what a click does and does not guarantee — setting out what I have, and where I think it stops being reliable. Reading back through what has been written here about Pen dose counters, three…
|
4 | 105 | 5mo |
| Topic | Participants | Replies | Views | Activity |
|---|---|---|---|---|
|
Needle changes between doses on a reusable pen
Posting this under the heading it deserves: Needle changes between doses on a reusable pen Everything below is what sits behind that. The question about needle changes between doses that I actually want…
|
+34 | 38 | 1.5k | 10mo |
|
Drawing from a pen cartridge with a syringe: how the risk profile changes
Posting this under the heading it deserves: Drawing from a pen cartridge with a syringe: how the risk profile changes Everything below is what sits behind that. Question about a metering device rather than…
|
2 | 159 | 19mo | |
|
Travel coolers and how long they really hold
On the subject in the title: Travel coolers and how long they really hold Working notes rather than a conclusion. A narrow question about travel coolers, deliberately narrow, because the broad version has…
|
+78 | 84 | 14k | 12mo |
|
Revisiting: Drawing from a pen cartridge with a syringe: how the risk profile changes
Revisiting: Drawing from a pen cartridge with a syringe: how the risk profile changes Writing it up because I had to work it out twice and would rather nobody else did. Question about a metering device rather…
|
2 | 18k | 6h | |
|
Follow-up: The decimal-point error, and the habit that catches it
On the subject in the title: The decimal-point error, and the habit that catches it Working notes rather than a conclusion. A follow-up question about decimal-point error that I did not know to ask the first…
|
+118 | 131 | 50k | 7mo |