syringe confusion - dead space etc.

crazyhaha

Member
I have been injecting 0.25 ml Test. Cypionate, IM in the glutes, every other day. I currently use a 1cc, 25g 5/8" leur lok syringe/needle.

I was originally taking it 2x a week, so I drew with a 21g and switched to the 25g to inject. Now, I don't switch.

But, it seems like I'm wasting meds as there is always some left between the syringe and needle.

I tried to order syringes with permanent needles, but I got "slip lock" needles.

I'm not stupid, but the syringe jargon is pissing me off. Can anyone point me in the right direction as to what kind of syringe I might be looking for.

Maybe when I have a chance I need to find a glossary of needle terminology and post it.

Thanks!
 
I have been injecting 0.25 ml Test. Cypionate, IM in the glutes, every other day. I currently use a 1cc, 25g 5/8" leur lok syringe/needle.

I was originally taking it 2x a week, so I drew with a 21g and switched to the 25g to inject. Now, I don't switch.

But, it seems like I'm wasting meds as there is always some left between the syringe and needle.

I tried to order syringes with permanent needles, but I got "slip lock" needles.

I'm not stupid, but the syringe jargon is pissing me off. Can anyone point me in the right direction as to what kind of syringe I might be looking for.

Maybe when I have a chance I need to find a glossary of needle terminology and post it.

Thanks!

Switch to fixed insulin syringes!



F722_4_2_new.webp A310_2_4.webp
 
The 27ga needles I have waste 7iu of test per use. Says so on the label. I use those to backfill 30ga insulin needles, but I noticed The insulin needle was always reading a little less than what I thought I put in. Those 30ga needles ware about 1iu each. I measured it out once, and 210mg/wk was actually 196/wk as far as what got injected with this daily dosing and backfilling technique. Not really a big problem, but I got curious. Blood tests reflected this compared to previous protocols best I could tell.
 
I noticed this too with my last set of syringes - a lot of dead space. .05 ml. I compared it to an earlier syringe/needle and the earlier design (BD Integra) had almost zero deadspace. Both BD brand. I wish there was a list of low deadspace needles. I don't know how to tell if a syringe/needle is low deadspace or not ???
 
I noticed this too with my last set of syringes - a lot of dead space. .05 ml. I compared it to an earlier syringe/needle and the earlier design (BD Integra) had almost zero deadspace. Both BD brand. I wish there was a list of low deadspace needles. I don't know how to tell if a syringe/needle is low deadspace or not ???


All insulin syringes with fixed needle are LDS and there are detachable LDS needles- plastic neck that fits within neck of standard syringe hub.
 

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This tool provides predictions based on statistical models and should NOT replace professional medical advice. Always consult with your healthcare provider before making any changes to your TRT protocol.

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Understanding Your Hormones

Estradiol (E2)

A form of estrogen produced from testosterone. Important for bone health, mood, and libido. Too high can cause side effects; too low can affect well-being.

DHT

Dihydrotestosterone is a potent androgen derived from testosterone. Affects hair growth, prostate health, and masculinization effects.

Free Testosterone

The biologically active form of testosterone not bound to proteins. Directly available for cellular uptake and biological effects.

Scientific Reference

Lakshman KM, Kaplan B, Travison TG, Basaria S, Knapp PE, Singh AB, LaValley MP, Mazer NA, Bhasin S. The effects of injected testosterone dose and age on the conversion of testosterone to estradiol and dihydrotestosterone in young and older men. J Clin Endocrinol Metab. 2010 Aug;95(8):3955-64.

DOI: 10.1210/jc.2010-0102 | PMID: 20534765 | PMCID: PMC2913038

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