Views: 0 Author: Site Editor Publish Time: 2025-11-05 Origin: Site
In the evolving field of drug delivery, FPS (Fixed Prefilled Syringe) Injection Pen represents a new generation of precision-engineered devices designed for single-use, high-viscosity, and biologic formulations. Unlike conventional injection pens that rely on detachable cartridges, the FPS system integrates a 1 mL slim glass syringe with a pre-mounted needle directly into the pen body — revolutionizing both mechanical performance and user experience.
Traditional injection pens use a replaceable cartridge housed inside the pen body. The pen’s internal mechanism pushes a plunger rod to drive the rubber stopper inside the cartridge, expelling the medication.
By contrast, the FPS injection pen replaces this setup with a prefilled, fixed 1 mL glass syringe — meaning the drug is pre-loaded, sealed, and sterilized as part of the device itself.
Key advantages include:
Reduced component complexity: No need for separate cartridge loading.
Enhanced sterility assurance: The syringe remains sealed from filling to injection, minimizing contamination risks.
Higher assembly precision: Fewer moving parts lead to greater mechanical stability and repeatability in dosing.
Unlike reusable pens that use replaceable needles, the FPS design integrates a thin, fixed needle directly on the syringe tip. This structure eliminates variability caused by different needle connections, ensuring consistent penetration depth, reduced injection force, and smoother drug flow.
From a clinical standpoint, it also reduces needle-handling errors and supports closed-system drug delivery, a critical feature for sensitive peptide or biologic medications.
The built-in slender 1 mL glass syringe offers both chemical compatibility and visual accuracy:
Superior drug stability: Borosilicate glass provides excellent resistance to drug adsorption and oxygen permeability.
Visual clarity: The transparent barrel allows direct observation of the drug solution, air bubbles, and flow behavior.
Dimensional precision: Each syringe is manufactured to tight ISO 11040 tolerances, ensuring seamless fit with the pen’s driving mechanism.
The slender form factor also allows fine control over injection speed and makes the device compact, lightweight, and user-friendly.
The FPS system achieves smoother plunger movement because the syringe and stopper are factory-paired and pre-lubricated under controlled conditions. The drive mechanism — often spring-assisted or manually triggered — delivers the medication with high force stability and low friction variance, resulting in a consistent injection flow across all batches.
This performance stability is especially valuable for high-value biologics, peptides, or GLP-1 analogs, where dose accuracy and smooth delivery are crucial for therapeutic efficacy.
| Aspect | Conventional Pen | FPS Pen (1 mL Glass Syringe Built-in) |
|---|---|---|
| Cartridge | Replaceable | Integrated, prefilled |
| Needle | Detachable | Built-in |
| Drug Compatibility | Moderate | Excellent (glass + coated stopper) |
| Assembly | Multi-step | Single-use, ready-to-inject |
| Sterility | Open system | Closed sterile system |
| Injection Experience | Variable | Consistent and smoother |
For pharmaceutical partners, FPS pens simplify the filling, assembly, and sterilization processes, while ensuring regulatory compliance with ISO 11608 and ISO 11040. For patients, the system offers greater convenience, safety, and confidence in every injection.
The FPS injection pen with built-in 1 mL slim glass syringe and fixed needle represents a leap forward in drug delivery technology, uniting industrial precision with clinical usability.
By eliminating the cartridge–needle interface and integrating the entire delivery path within a single sealed system, it achieves the highest standards of accuracy, sterility, and patient comfort — setting a new benchmark for next-generation injectable therapies.
