BD invented the Luer-Lock and sets the global standard for it. Lumafield scanned eight 10 mL syringes, four BD units and four generic units from an online marketplace, and measured the internal geometry that governs how a syringe seals and how consistently it delivers a dose. Surface inspection cannot tell you whether the geometry inside matches. A CT scan can.

What's inside

The brief walks through what CT resolves inside a fully assembled syringe, and what the measurements say about the process behind each one:

• A luer connector cross-section where the generic tip's bore widened toward the opening instead of tapering inward, with a visible gap showing the rubber stopper was not seated flush, on the exact tip geometry ISO 80369-7 exists to control
• Barrel wall thickness that ran 13 to 17 percent thinner on the generic units, with more than twice the variability at the top position, a direct signal of molding process inconsistency
• Barrel concentricity that climbed unit to unit on the generic syringes, from 0.069mm to 0.143mm, a pattern that points to a drifting process rather than a single bad unit, with every generic reading exceeding the highest BD reading
• Why an off-center bore applies asymmetric force on the plunger seal and changes the internal diameter that determines dose volume
• What unit-level dimensional inspection across every incoming shipment makes possible for a device maker or a procurement team qualifying suppliers