Needles – Selection, Gauge and Length

Needles ( Parts of ) 

A hypodermic needle is composed of three parts

The hub which fits onto the tip of a syringe
The shaft which connects the hub
The bevel or slanted tip or eye of the needle (different bevels are required depending on use of needle).

Needle Size ( Gauge ) 

Needle size is measured in gauges (diameter of the needle)

The higher the gauge, the finer the needle and selection is made depending on the viscosity of the liquid to be injected. In our tribe viscosity is mostly a consequence of the carrier oil used, that is the Oil in which we suspend the Steroid Hormone itself. 

Different ” labs” use different Carrier Oils. 

Corn, cottonseed, peanut, or grape seed oil, castor  etc all have different levels of viscosity as such which needle you can use ” at a minimum” will be determined by the carrier oil being used by the supplier you choose. 

Needle Length

When performing an Intramuscluar Injection needles need to be long enough to ensure the drug is injected into the muscle and NOT delivered subcutaneuosly  

Typically a 25mm or 38mm ( 1 or 1/1/2″ ) long needle is used in our Tribe. 

Length depends on

Muscle mass

Patient’s weight

Amount of subcutaneous fat you have 

Always use the correct length and gauge of the needle 

The needle you use for the actual administration must be long enough to reach into your muscle and thick enough to allow the drug to pass through. 

Typically either a long green ( 21g x 1.5” ) or long blue ( 23g x 1.25” ) needle is used for most carrier Oils. 

I personally use a long orange ( 25g x 1.5″ ) when doing IM injections because I wish to minimize scar tissue formation over a multi-decade user protocol. But you will need to determine if your supplier’s formulation is suited to this gauge of needle, however ultimately you can only tell via testing it. 

Traditionally nurses have been taught to leave a few millimeters between the skin and the hub of the needle in case the needle breaks off during the injection. This practice is not evidence-based and with modern single-use needles, is no longer necessary.

Needles Damage from Multiple Use 

Ideally, you need two for each injection: one to draw up with and another for the actual injection.

Discard the used needle in your sharps box. 

Every single piece of equipment used in an injection must be considered lethally contaminated and disposed of safely into a specially designed sharps box

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