Science: Health: Immunization
stripes on hypodermic needles   (+8)  [vote for, against]
stripes on hypodermic needles could be used to accurately approximate depth, which I read makes a difference.

I haven't seen a needle with a ruling on it, yet I have read a study saying they researched the difference between a 1/4 inch and a 1/2 inch penetration depth and could now refer the new 1/4 inch for approval.

It seems like practitioners, and particularly developing world medical people could benefit from putting depth lines on hypodermic needles.

Who knows, perhaps it moves the efficacy 5% That is big when you consider an entire country.
-- beanangel, May 07 2018

Depth stop for punctures. https://www.ted.com..._moments_in_surgery
[2 fries shy of a happy meal, May 08 2018]

Prior art http://medent.usyd....20annulirostris.htm
[spidermother, May 11 2018]

What is this "inch" you refer to ?

// when you consider an entire country. //

Giving an entire country an injection sounds like a challenge, although it is possible to give an entire country an enema once the national anus has been located. In the case of france, this is comparatively easy.
-- 8th of 7, May 07 2018


This is not, in fact, an entirely stupid idea. It also eschews the use of "at". Hence [+].
-- MaxwellBuchanan, May 07 2018


What would you propose as the material of choice for the marks?

8th, doesn’t it occur to you that with 1/4” markings, there would be fewer gradations than with 1 mm markings, causing the injectee to panic less as it plunges ever deeper?

Oh, what am I saying, of course you have. Must remember with whom I am talking.
-- RayfordSteele, May 07 2018


Doesn't sound dispractical. Could be a confeasible nonunilantiintelligent idea.
-- doctorremulac3, May 07 2018


Depth markings on other types of needles such as biopsy needles appears to be known (from a quick Google search).

I couldn't find anything for normal hypodermic needles. However, I think what might be more practical would be a depth stop rather than depth markings.
-- xaviergisz, May 07 2018


<looks at the steel ruler I bought last year, one side metric, other side inches> Yep. there are still people who are on feet and inches.

[+] for two explicable and good ideas
-- not_morrison_rm, May 08 2018


//what might be more practical would be a depth stop// Actually, that's a good point. If a needle is meant to penetrate to a depth of 8mm, why not use an 8mm long needle?
-- MaxwellBuchanan, May 08 2018


(+) Depth stop after puncturing skin or bone is a huge problem.

Cool TED talk by the guy who figured out the solution. [link]

It was hard to find. You'd think it would be at least one of the hits for the word 'needle'.
-- 2 fries shy of a happy meal, May 08 2018


simple[+] The downside is that the most painless jab is a fast one, and it takes experience to learn that. A doctor trained to slowly push in to the right mark will be giving painful shots his whole career.
-- Voice, May 11 2018


//what might be more practical would be a depth stop//

What about a needle whose length is adjustable? Just dial or otherwise adjust it to the appropriate measurement and jab away without having to think about it.
-- doctorremulac3, May 11 2018


//jab away without having to think about it //

But that's what medics do anyway ...
-- 8th of 7, May 11 2018


Everyone is different. There still has to be some individual patient referencing to know what the marks mean.
-- wjt, May 11 2018



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