Sterile Hypodermic Syringe (20 ML)

A 20 mL sterile hypodermic syringe is a large-capacity clinical device engineered for single-use medical applications. It is primarily utilized for administering precise large-volume medications, intravenous (IV) infusion pumps, post-surgical wound irrigation, and the aspiration of bodily fluids.

Key Technical Specifications

Nominal Capacity: 20 milliliters (often engineered with a safety overfill zone up to 22 mL).

Graduation Scale: Highly prominent, abrasion-resistant markers distributed at 1.0 mL intervals (with secondary increments at 0.2 mL on high-precision models) for accurate volume assessment.

Material Composition: The transparent barrel and structural plunger are molded from non-toxic, medical-grade virgin polypropylene.

Sterilization Standard: Individually blister-wrapped and treated with Ethylene Oxide (ETO) gas or Gamma radiation to guarantee a 100% pyrogen-free fluid pathway.

Tip Configuration:

BD Luer-Lok™ Tip: threaded, screw-on mechanism critical for high-pressure fluid transfers, preventing accidental needle or tubing detachment.

Luer Slip / Mount: A 6% conical friction-fit taper conforming to ISO:594 protocols, often positioned eccentrically (off-center) to allow close alignment with blood vessels during venipuncture.

Component Engineering (3-Piece Assembly)

The Barrel: A clear, impact-resistant outer cylinder outfitted with wide, textured finger flanges to ensure absolute manual stability during high-resistance fluid pushes.

The Plunger Rod: Designed with an integrated thumb-press ring and a structural retaining ring inside the barrel to prevent accidental pull-out during aspiration.

The Sealing Gasket: An inert, latex-free synthetic rubber piston treated with a microscopic layer of medical-grade silicone oil to provide a smooth, low-friction glide without fluid backflow.

Common Needle Pairings

Due to the mechanical resistance of moving a 20 mL fluid volume, these syringes are rarely paired with ultra-fine needles. Standard configurations include:

21G to 22G (1.25 to 1.5 Inch): The global default pairing for deep therapeutic injections or administering heavy volume anesthesia.

18G (1.5 Inch): Utilized specifically as a compounding/draw-up needle to rapidly pull medication out of rubber-stopper vials without clogging.

Without Needle: Frequently purchased standalone for direct integration into stopcocks, three-way valves, or IV lock extensions.