304 316l Stainless Steel Flat Three Blade Puncture Needle

Product Description

304 / 316L Stainless Steel Flat-Position Three-Cutting-Edge Puncture Needle is a specialized surgical instrument designed for precise, low-trauma entry in delicate procedures where a traditional beveled needle is suboptimal. Its defining feature is a unique tip geometry: a flattened distal end ground with three sharp, radial cutting edges that converge at a central point, creating a "trocar-like" or "pyramid" tip when viewed from the side. This design, combined with the optional flat section ("flat position") on the shaft for orientation, allows for clean tissue separation with minimal deflection and reduced coring compared to a standard beveled cannula. Manufactured from corrosion-resistant 304 or 316L stainless steel, it is ideal for ophthalmic, dermatological, and other microsurgical applications requiring exceptional control and tissue preservation.

Product Processing

1. Material Selection & Tubing Preparation: Medical-grade 304 or 316L stainless steel tubing is precision-drawn to the required outer and inner diameter. The tube is cut to length and straightened.

2. Forming the Flat Section (if applicable): A specific segment of the needle shaft may be precision-ground or pressed to create a flat surface. This "flat" provides a visual and tactile reference for the surgeon to orient the cutting edges.

3. Three-Edge Tip Grinding (Core Process): The distal end is ground using a specialized CNC grinding process. The grinder creates three equally spaced longitudinal facets (cutting edges) that meet at a sharp central apex. The angles and symmetry of these edges are precisely controlled. This is distinct from a simple bevel; it's a true multi-faceted cutting point.

4. Honing & Deburring: The three cutting edges are carefully honed to razor sharpness. Any micro-burrs are removed to ensure clean cutting action.

5. Surface Finishing: The entire needle, especially the complex tip geometry, undergoes electropolishing. This achieves a mirror-smooth, passive surface that minimizes tissue drag and enhances corrosion resistance.

6. Hub Attachment & Marking (Optional): A Luer lock hub or other connector may be attached. The flat section (if present) is often marked (e.g., with a laser) to correlate with the orientation of the cutting edges.

7. 100% Inspection & Sterilization: Each needle is microscopically inspected for tip symmetry, edge sharpness, and dimensional accuracy. It is then cleaned, packaged, and sterilized (e.g., via Gamma irradiation or autoclaving for reusable versions).

Product Applications

• Ophthalmic Surgery (Primary Use): Clear Corneal Incisions in cataract surgery, anterior chamber paracentesis, and secondary port creation. The three-edge design creates a self-sealing, shelved incision with minimal tissue distortion.

• Minimally Invasive & Laparoscopic Surgery: For initial trocar-like punctures where a small, precise entry point is needed, potentially reducing the risk of visceral injury.

• Dermatology & Aesthetic Medicine: For precise intradermal injections or the creation of micro-channels in specialized treatments, where a multi-cutting-edge tip can provide more controlled penetration than a single bevel.

• Veterinary Microsurgery: Similar delicate procedures in small animal ophthalmology and surgery.

Product Technical Parameters (Detailed Table)