Editorial Technical Reference

Syringe Assembly

This page explains how Syringe Assembly is classified within Machinery and Equipment Manufacturing. Technical values and manufacturer relationships are research references; confirm the current specification and supplier evidence for each order.

Technical Definition & Core Assembly

A precision medical device component that holds and dispenses contrast media during medical imaging procedures.

Product Specifications

Technical details and manufacturing context for Syringe Assembly

Definition
The syringe assembly is a critical component of contrast media injectors used in medical imaging (CT, MRI, angiography). It consists of a syringe barrel, plunger, and associated seals that work together to accurately measure, contain, and deliver contrast agents under controlled pressure. This assembly ensures sterile, precise, and reliable injection of contrast media into patients' bloodstreams for enhanced diagnostic imaging. The assembly is designed to meet stringent medical standards, with materials such as medical-grade polycarbonate, stainless steel, and silicone rubber, ensuring biocompatibility and durability. Key parameters include nominal volumes ranging from 10 to 200 mL, a 6% Luer lock taper for secure catheter attachment, plunger forces between 15 and 40 N, and a leakage rate of ≤0.1 mL/min at 300 kPa internal pressure. Operating pressure ranges from 1.0 to 1.6 MPa, and the temperature range for storage and operation is 5 to 40 °C. Dimensional tolerances are ±0.1 mm, and sterilization methods include ethylene oxide (EO) and gamma irradiation. These specifications are reference values that must be verified for the specific model and application with the legal manufacturer or supplier. The assembly is intended for use in controlled medical environments, and proper handling and maintenance are essential to ensure performance and patient safety.
Working Principle
The syringe assembly operates by creating a sealed chamber (syringe barrel) where contrast media is loaded. A motor-driven plunger moves within the barrel, creating positive pressure to dispense the media through connected tubing to the patient. Precision sensors monitor volume and pressure, while seals prevent leakage and maintain sterility throughout the injection cycle. The plunger force and operating pressure are controlled to ensure accurate delivery, and the Luer lock connection provides a secure interface to the catheter. The assembly is designed to maintain a low leakage rate, ensuring that the contrast media is delivered precisely and safely.
Common Materials
Medical-grade polycarbonate, Stainless steel, Silicone rubber
Technical Parameters
ParameterTypical rangeNotes & selection driver
Nominal Volume10–200 mLCommon sizes for contrast media deliveryISO 7886-1
Luer Lock Connection6% taperEnsures secure attachment to catheterISO 594-1
Plunger Force15–40 NRequired to maintain steady flowISO 7886-1
Leakage Rate≤0.1 mL/minAt 300 kPa internal pressureISO 7886-1
Temperature Range5–40 °CStorage and operation
MaterialPC, PP, siliconeBiocompatible gradesISO 10993-1
Sterilization MethodEO, gammaMust not degrade materialISO 11135
Weight20–80 gDepends on volume and material
Tolerance on Dimensions±0.1 mmCritical for sealing and fitISO 2768-m

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM
  • Syringe Barrel Part
    Holds the contrast media and provides structural integrity
    Material: Medical-grade polycarbonate
  • Plunger Part
    Creates pressure to dispense contrast media through controlled movement
    Material: Stainless steel
  • Piston Seal Part
    Creates airtight seal between plunger and barrel to prevent leakage
    Material: Silicone rubber
  • Nozzle/Outlet Part
    Connection point for tubing that delivers contrast media to patient
    Material: Stainless steel
  • Sensors
    Monitor the delivered volume and the injection pressure.

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Syringe Assembly.

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Industrial Ecosystem & Supply Chain Structure

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: Up to 150 psi (10.3 bar) maximum working pressure
flow rate: 0.1 to 10 mL/sec typical, depending on syringe size and application
temperature: 15°C to 40°C (operating), -20°C to 50°C (storage)
slurry concentration: Not applicable - designed for homogeneous contrast media solutions only
Media Compatibility
✓ Iodinated contrast media (e.g., Iohexol, Iopamidol) ✓ Gadolinium-based contrast agents ✓ Sterile saline solutions for flushing
Unsuitable: Highly viscous suspensions or particulate-laden fluids exceeding 5 microns in particle size
Sizing Data Required
  • Required injection volume per procedure (mL)
  • Maximum injection flow rate requirement (mL/sec)
  • Compatibility with existing injection system connection interface (e.g., Luer lock type, diameter)

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Plunger seal leakage
Cause: Material degradation from chemical incompatibility with medication, or wear from repeated friction against barrel wall
Barrel cracking or fracture
Cause: Stress concentration from improper handling or assembly, or material fatigue from repeated autoclaving cycles
Maintenance Indicators
  • Visible fluid leakage past plunger seal during operation
  • Audible clicking or grinding noise when depressing plunger, indicating seal friction or barrel obstruction
Engineering Tips
  • Implement strict material compatibility verification for seals with all intended medications and sterilization methods
  • Establish controlled assembly procedures with torque-limited plunger insertion to prevent barrel stress and seal damage

Indicative industry ranges for design and RFQ preparation. Confirm the exact figures and applicable standard with the manufacturer before specifying.

Compliance & Manufacturing Standards

Applicable Standards
ISO 7886-1: Sterile hypodermic syringes for single use ANSI/AAMI/ISO 80369-7: Small-bore connectors for liquids and gases in healthcare applications ASTM D999-08: Standard Test Methods for Vibration Testing of Shipping Containers

Quoted from the published standard.

Manufacturing Precision
  • Plunger fit: +/-0.05mm clearance for smooth operation
  • Needle hub taper: +/-0.02mm for secure Luer lock connection
Quality Inspection
  • Dimensional verification with coordinate measuring machine (CMM)
  • Leak test under pressure (e.g., 300 kPa for 30 seconds)

Manufacturers of Syringe Assembly

2 companies list this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.

Shenzhen Lnkmed Medical Technology Co., Ltd.
Shenzhen, Guangdong, CN
Listed on the company's own website · profile compiled by CNFX from public sources
Listed there as: “MRI Contrast Injector Syringe”
View source page ↗ lnk-med.com · checked 2026-08-28
WEGO Medical
Hong Kong, CN
Listed on the company's own website · profile compiled by CNFX from public sources
Listed there as: “CT Injector syringe”
View source page ↗ wegomedical.com · checked 2026-09-04

Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

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Frequently Asked Questions

What are the common sizes for this syringe assembly?

The nominal volume ranges from 10 to 200 mL, as listed in the directory. However, the exact volume for a specific model must be confirmed with the legal manufacturer or supplier.

What standards apply to this syringe assembly?

The directory lists ISO 7886-1 for volume, plunger force, and leakage rate; ISO 594-1 for the Luer lock connection; ISO 10993-1 for biocompatibility; and ISO 11135 for sterilization methods. These are reference standards for verification, not proof of certification.

What materials are used in the syringe assembly?

The materials on file include medical-grade polycarbonate, stainless steel, and silicone rubber. These are typical materials, but the exact grades and suitability must be verified with the manufacturer.

How should the syringe assembly be sterilized?

The directory indicates that ethylene oxide (EO) and gamma irradiation are acceptable sterilization methods, as per ISO 11135. However, the specific sterilization method must be validated for the actual product.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification
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