Luer-Lock Syringe – 3 mL (No Needle)

A 3 mL Luer-lock syringe is a standard disposable injection syringe with a 3-milliliter barrel and a threaded (Luer-lock) tip for attaching needles. These syringes are supplied sterile for single-patient use and are sold without a needle attached. (This allows the user to select and attach an appropriate needle gauge and length for the intended procedure.) The syringe consists of a clear plastic barrel (usually polypropylene) with graduated volume markings, a rubber-tipped plunger, and a female Luer-lock fitting at the tip. Major syringe makers (e.g. BD, Terumo, Nipro) describe the 3 mL Luer-lock syringe as a precision drug-delivery device for general use. For example, BD (Becton Dickinson) notes its 3 mL Luer-Lok™ syringe is “sterile, single-use” with a Luer-lock tip, emphasizing its accuracy and disposability.

Key Specifications:

• Capacity: 3 mL total volume (graduated typically in 0.1 mL increments, with major lines at 0.5 or 1.0 mL). The fine graduations allow accurate dosing of most common injectable medications.
• Tip (Fitting): Female Luer-lock (threaded) tip. This is a standardized 6% taper fitting (ISO 594-2 compliant) that twists and locks a compatible male Luer-lock needle hub onto the syringe for a secure, leak-free connection. (In contrast, a Luer-slip syringe uses a simple push-on tip without threads.) The positive lock minimizes the risk of needle detachment or leaks during injection or aspiration.
• Construction: Usually a two- or three-piece design – a transparent barrel marked in mL, a plunger rod, and a rubber or synthetic gasket at the plunger tip. High-quality medical-grade plastic (polypropylene or polyethylene) and synthetic elastomer ensure clarity and a smooth plunger seal. The barrel is clear so liquids and air bubbles are easily visible.
• Sterility & Packaging: Supplied individually sterile and meant for one-time use only. Common packaging is sealed foil/plastic blister packs or boxes (often 100 or 200 per case). After use, the syringe (with needle) must be disposed of in a proper sharps container. Reuse of syringes is strictly prohibited for safety and infection control.
• No Needle Included: “Without needle” means the syringe is shipped empty of needles. The user can attach any standard Luer-lock needle of the desired gauge/length. (This is useful for stocking flexibility or using specialized needles.)

Applications and Uses: Luer-lock 3 mL syringes are general-purpose devices used whenever ~1–3 mL injections or fluid withdrawals are needed. For example:

• Medication Injections: Common for intramuscular, subcutaneous, or intravenous injections of medications and vaccines (non-insulin drugs, antibiotics, pain medications, etc.). The 3 mL size can accommodate a typical single-dose volume, and the secure Luer-lock connection is ideal for more viscous drugs or pressure injections.
• IV Line Flushing/Medication: Flushing intravenous catheters or IV lines with saline or heparin lock solution; administering IV push medications. A syringe with a Luer-lock tip attaches firmly to IV ports or catheter hubs, preventing leakage.
• Blood Draws/Biological Samples: Drawing small blood samples or fluid aspirates. (Though dedicated vacutainer syringes and tubes are often used clinically, a plain syringe can fill or measure fluids.)
• Procedural Use: Drawing up contrast dye or other fluids for radiology, injecting local anesthetic (e.g. dental blocks, minor procedures), allergy shots (non-insulin), veterinary uses, or any task needing a sterile fluid handle.
• Laboratory Use: In research and lab settings, 3 mL Luer syringes are used to dispense reagents, load lab instruments, or inject solutions into analytical devices. They are “general-purpose syringes” widely used for drawing up and expelling liquids or suspensions. They can be fitted with needles, syringe filters, tubing, etc., for lab procedures.

A Luer-lock tip syringe may be chosen over a Luer-slip syringe when a tight, secure needle connection is desired (especially under pressure). For example, injecting thick medication or aspirating fluid quickly can create back-pressure; the threaded lock prevents the needle from accidentally popping off. Luer-lock syringes are often preferred in hospital IV, anesthesiology, and critical care settings for this reason.

Handling and Safety:

• Single-Use Only: As with all sterile syringes, each 3 mL syringe is intended for one patient one time. After administering medication or drawing fluids, do not reuse the syringe or plunger. Reuse risks severe infection and cross-contamination. Disposal should follow medical waste regulations – place the intact syringe (needle attached) into a sharps container immediately after use.
• Sterile Technique: Before use, verify that the packaging is intact. Use aseptic (clean) technique when preparing and handling the syringe to avoid contaminating the tip or barrel.
• Attaching Needles: To attach a compatible needle (Luer-lock male hub), align the needle’s plug with the syringe tip and twist clockwise until finger-tight. The screw-on Luer-lock design provides a “very tight fit bond”. Always ensure the needle is secure before drawing medication or injecting to prevent leaks. (Never twist a slip-tip needle into a Luer-lock syringe, as slip-tip needles are not threaded.)
• Graduated Markings: The barrel’s printed scale (in mL) allows precise measurement down to 0.1 mL. This aids accuracy for dosing. Take care to read the meniscus at eye level for accurate volume.
• Caution: Syringes should be handled carefully to avoid needlestick injuries. Do not recap needles after use. Dispose of needles and syringes together. Keep out of children’s reach.

Summary: A 3 mL Luer-lock syringe (no needle) is a versatile, sterile, general-purpose syringe broadly used in healthcare and lab contexts. Its defining feature is the threaded Luer-lock tip, which allows a secure needle attachment. With a 3 mL capacity and fine scale, it suits many non-insulin injections or fluid transfers. Renowned syringe manufacturers describe their 3 mL Luer-lock syringes as precision drug-delivery devices that are sterile, single-use and available without an attached needle (www.bd.com) (www.bd.com). In practice, clinicians use these syringes for everything from routine injections and IV flushes to aspirating samples. As with all medical syringes, proper sterile handling and disposal are crucial to ensure patient safety.

Manufacturer: Dynarex
Product number: 6988