Filter needles: Hi, just wondering how... - Pernicious Anaemi...

Pernicious Anaemia Society

32,623 members23,985 posts

Filter needles

weaverdee profile image
12 Replies

Hi, just wondering how many on here use a filter needle when drawing up from ampules, also , do you use glass or disposable syringes. My daughter intends to do sc injections starting in approx 2 weeks and we’re still a little confused about needles and syringes.

Do we need the same brand of needles and syringes or does one size fit all. Hope I’m making sense.

I read some posts about it being dangerous not to use a filter needles, yet others that say it’s not a problem because the needles are so fine.

Think I need help please.

Written by
weaverdee profile image
weaverdee
To view profiles and participate in discussions please or .
12 Replies
deniseinmilden profile image
deniseinmilden

Basic plastic 2ml disposable syringes and needles no bigger diameter than 23G for injecting.

The NHS recommends no finer needles than 23G in case you bend one. I can't recommend them but I use 26G needles carefully and find them much more comfortable, even if they are considered to be unsafe. Your insulin needles are 30G and that's considered OK: maybe diabetics (and dentists, who also use very fine needles, thank goodness, and nurse doing jabs with pre-loaded preparations like anticoagulants, etc) are more careful than people with B12 who might have neuropathy or the shakes? 😜

The higher the G (gauge) the finer the needle.

I inject IM (coz it's so easy) so I use 1" needles but if you are used to doing SC then go for that and you'll know how long you need them to be.

Because the B12 is water based you can use a fine needle for drawing up as well as for injecting so I don't bother to buy two sorts.

But DO change needles between drawing up and injecting in case you have touched the tip of the needle on the ampoule when drawing up - it is very easy to do and makes it scratchy when you try to insert it: not dangerous but not pleasant!

No, you definitely don't need filter needles - if (extremely unlikely) you did get some glass in you, your body would just store it or eject it, like it would fine shrapnel or bits of glass, etc, from a car accident for instance.

Well done for being sensible and questioning the scaremongering!

researcher21 profile image
researcher21 in reply todeniseinmilden

Is it possible to send a link as I wish to order some needles and feel nervous re the type and their sterility.

deniseinmilden profile image
deniseinmilden in reply toresearcher21

I'm working now so you will probably find them quicker if you look them up yourself at

Exchange Supplies

Or

Medisave

Either of these companies - and many others supply excellent needles.

Any problems try me again later, please!

Nackapan profile image
Nackapan

Thats interesting I've never heard of filter needles.

I use 30G 1/2 "to inject as I choose to do subcutaneous injections at home.

Most do IM as deniseinmilden describes.

Definitely use a different needle to withdraw b12. I've never not touched the inside of the ampoule yet!

I use an ampoule snapper now . For some reason I found that the hardest part when I started recently to self inject was to snap the top of the ampoule off. I cut myself once as it wasnt a clean break as it needed more strength than I thought .Thee Rotexmedica have a white line on that facing you and you snap back.

The sharps box I bought from the local pharmacy for £1.70 has a phone number on you ring when full and they collect it. Some chemists do take them.

Hope it goes well.

weaverdee profile image
weaverdee in reply toNackapan

Thanks very much for that. We will be doing subcutaneous injections too using either a 8mm or 4mm needle, would you mind telling me what size you use for the main injection and weather or not you pinch first please.

Nackapan profile image
Nackapan in reply toweaverdee

I use 30G 1/2" you can use 27G -30G ti inject the b12.

I squeeze a roll if putting in my stomach. I initially did on my thigh. I just hold it now I'm new to it as well. Thete are diagrams showing parts of the body suitable if tih Google.

weaverdee profile image
weaverdee in reply toNackapan

Thank you. Hope all goes very well for you too.

Nackapan profile image
Nackapan in reply toNackapan

You can get different lengths depending on your size. It needs to get in the subcutaneous fat.

Ryaan profile image
Ryaan

Never heard of filter needles, I’ve been on this site for 4 years and self inject from single use glass ampules, no ones ever mentioned them on here.

You don’t need filter syringes.

Just basic disposable syringes and needles are what even nurses and doctors use.

But I understand your concern if you’re newly starting to inject.

Good luck and don’t worry it’s all very simple and easy once you get started.

weaverdee profile image
weaverdee

Just realised you said you use 1/5” to inject sorry, all the same, pinch or no pinch first. Also, do you think 4mm or 8 mm too short for injecting

Achesandpains75 profile image
Achesandpains75

I have never needed to use any other than the injection needle.

I use subcutaneous injections in the abdomen fat layer because this has been shown to be a slower release method - which is potentially beneficial.

Since the needle required should be 1/2ins for this type of injection I am able to safely use gauge 29 or 30 (much thinner and absolutely pain free during insertion and withdrawal). Slight sting during first 0.1ml of injection but painfree if you take your time - I inject 0.1 ml portions at about 2-3 sec intervals.

This length of needle cannot reach the bottom of the opened phial so there is no risk if touching the bottom of the phial and blunting it.

The tip is diagonally shaped so I ensure the open side is away from the side of the phial to speed up filling of the syringe.

Good luck!

weaverdee profile image
weaverdee in reply toAchesandpains75

Thanks very much.

I am diabetic myself and do sc injections using a 4 mm needle these days and was told there was no need to pinch a fold of skin using these as they are so short and therefore will go into the fat ty tissue. I have had no problems with my insulin with these needles and wondering if you think they would be suitable in the same way for vitamin B injections.

The needles are 30g 4mm.

Many thanks.

Not what you're looking for?

You may also like...

Filter needles for self injecting

Hi Folks, I'm after a bit more advice - now I've decided to SI I'm nervous about using. The correct...
Ree2705 profile image

Filter and syringe help

Hey I've bought my b12 from online and have been injecting for the past month or so now once a...
Krealan profile image

Filter needles

I’m hearing people say that a special filter needle is needed to draw up the fluid, to prevent...

SI (needles)

Hi all, I've just purchased B12 ampules reading to start SI. My surgery does IM jabs, but I will...

What needles / syringes

Hi I've ordered the following but what needles / syringes do I need and where do I get them from...
HippyChick73 profile image

Moderation team

See all
Gambit62 profile image
Gambit62Administrator
Foggyme profile image
FoggymeAdministrator
taka profile image
takaAdministrator

Content on HealthUnlocked does not replace the relationship between you and doctors or other healthcare professionals nor the advice you receive from them.

Never delay seeking advice or dialling emergency services because of something that you have read on HealthUnlocked.