Glossary entry (derived from question below)
English term or phrase:
priming a pen
English answer:
eject the air from a pen
English term
India
Your project is in safe hands
Native in: Hindi 
Works in: English to Hindi, Hindi to English
priming a pen
Please see the following examples:
Prime the pen after each cartridge change.
Priming prevents the injection of air and makes sure the correct amount of study medication is delivered.
Thanks in anticipation.
Aug 17, 2016 13:27: Sven Petersson Created KOG entry
Non-PRO (1): Yvonne Gallagher
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Responses
Sweden
Medical Translator
Native in: Swedish 
, English
Works in: English to Swedish, Danish to Swedish, German to Swedish, and 13 more.
eject the air from a pen
| agree |
Jörgen Slet
: With pumps and injectors, priming should be "filling with liquid". But it's basically the same thing
11 hrs
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Thank you very much!
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| agree |
Michael Barnett
: Good as well. Exact procedure explained in Dave's answer.
18 hrs
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Thank you very much!
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| agree |
Cilian O'Tuama
: get the air out
21 hrs
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Thank you very much!
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| agree |
Piyush Ojha
1 day 17 hrs
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Thank you very much!
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| agree |
acetran
2 days 3 hrs
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Thank you very much!
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worked for int. orgs (IMF, OAS, IDB)
Native in: English
Works in: Spanish to English, German to English
getting the pen ready/preparing the pen before the injection
Prime the pen before each injection: This releases a small amount of insulin into the pen to help get rid of air bubbles that may be in the pen. Air bubbles can ...
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Note added at 22 mins (2016-08-12 03:16:49 GMT)
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and that's the way you do it
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Note added at 24 mins (2016-08-12 03:18:20 GMT)
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An insulin pen is used to inject insulin for the treatment of diabetes. Insulin is a hormone produced by the pancreas. It is composed of an insulin cartridge (integrated or bought separately) and a dial to measure the dose, and is used with disposable pen needles to deliver the dose. It was introduced and marketed as Novopen by the Danish company Novo Nordisk in 1985.
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Note added at 26 mins (2016-08-12 03:20:19 GMT)
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http://www.wikihow.com/Use-an-Insulin-Pen
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Note added at 30 mins (2016-08-12 03:24:20 GMT)
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What Are Insulin Pens?
Highlights
Insulin pens come in two basic forms: disposable and reusable.
Unlike vials of insulin, insulin pens do not require constant refrigeration.
Some pens expel excess insulin through the needle in such a way that it will not enter your skin. Others have an option to reset your pen to zero units and start over.
Managing diabetes often requires taking insulin shots throughout the day. There are many insulin-delivery systems—including insulin pens—that make giving insulin shots much easier. If you currently use an insulin vial and syringe to deliver your insulin, switching to an insulin pen may increase both your compliance to your insulin routine and the ease of taking your insulin shots.
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Part 2 of 4: Uses
How Do Insulin Pens Work?
Insulin pens come in two basic forms: disposable and reusable. The disposable insulin pens contain a prefilled cartridge and are thrown away when they are empty. Reusable pens require that you replace the insulin cartridge each time it is emptied. These pens do not eliminate your need to poke yourself with a needle; they simply make measuring and delivering your insulin easier. Insulin pens hold between 21 and 80 units of insulin at a time and can deliver insulin in increments of one-half unit, or one unit, or two units. The maximum dose that can be delivered at one time varies between pens.
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Note added at 39 mins (2016-08-12 03:33:48 GMT)
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"priming" in the broadest sense = prepare
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Note added at 40 mins (2016-08-12 03:34:40 GMT)
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make sure everyting is right before executing
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Note added at 41 mins (2016-08-12 03:35:15 GMT)
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everthing
| agree |
Yasutomo Kanazawa
: Yes, prime here means to prepare.
1 hr
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| agree |
Yvonne Gallagher
5 hrs
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| neutral |
British Diana
: I thinbk this is too vague. The Asker and later the reader need(s) exact instructions
6 hrs
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| neutral |
Jörgen Slet
: too vague here
12 hrs
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| agree |
Michael Barnett
: Normally you turn the dial on the pen to specify the amount of insulin to inject and then press the button to release the spring that injects the insulin. Priming consists of injecting into air for the first dose of each new cartridge to expel the air.
19 hrs
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| agree |
Phong Le
21 hrs
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| disagree |
Cilian O'Tuama
: too vague, as others have also said
22 hrs
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| agree |
philgoddard
1 day 7 hrs
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| agree |
acetran
2 days 5 hrs
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Discussion
I remember reading a thriller in which the murderer disposed of his victim by deliberately allowing air to be injected into a vein, so I suppose not properly priming an intravenous injection could be fatal. (Medical professionals, please correct me if this is not so.)