Precision Stainless Steel Capillary Tubes for Medical Application Components
What Are Medical Puncture Needles?
Medical puncture needles are precision-engineered hollow needles used for vascular access, diagnostic sampling, therapeutic delivery, and minimally invasive procedures. Made from high-grade stainless steel (304, 316L, 420J2), these needles must meet exacting standards for sharpness, dimensional accuracy, patency, and biocompatibility.
As a stainless steel medical device OEM manufacturer, we produce a comprehensive range of puncture needles for global medical device companies, with full ISO 9001 quality management and EN 10204 3.1 material certification.
Types of Puncture Needles We Manufacture
Vascular Access Needles
| Type | Gauge | OD (mm) | Applications |
|---|---|---|---|
| IV Catheter Introduction Needle | 14G-24G | 2.108-0.711 | Peripheral IV access, blood transfusion |
| Central Line Introduction Needle | 16G-18G | 1.651-1.270 | Central venous access, CVC placement |
| Arterial Blood Sampling Needle | 20G-22G | 0.908-0.711 | ABG sampling, arterial pressure monitoring |
Spinal & Epidural Needles
| Type | Gauge | OD (mm) | Tip Design | Applications |
|---|---|---|---|---|
| Spinal (Whitacre) | 25G-27G | 0.508-0.406 | Pencil point, atraumatic | Spinal anesthesia |
| Spinal (Quincke) | 22G-25G | 0.711-0.508 | Bevel cutting | Spinal anesthesia, CSF sampling |
| Epidural | 16G-18G | 1.651-1.270 | Huber, cutting | Epidural anesthesia |
Biopsy Access Needles
| Type | OD (mm) | Wall (mm) | Applications |
|---|---|---|---|
| Bone Marrow Biopsy | 2.0-3.0 | 0.3-0.5 | Bone marrow aspiration, trephine biopsy |
| Liver Biopsy | 1.4-2.0 | 0.2-0.3 | Liver tissue sampling |
| Prostate Biopsy | 1.2-1.6 | 0.15-0.25 | Transrectal prostate sampling |
Material Selection
| Grade | Standard | Hardness | Best For |
|---|---|---|---|
| 304 | ASTM A269 | ≤92 HRB | General puncture needles, non-critical access |
| 316L | ASTM A269 | ≤95 HRB | Biocompatible needles, implantable access |
| 316LVM | ASTM F138 | ≤95 HRB | Implantable, fatigue-critical applications |
| 420J2 | ASTM A276 | 50-55 HRC | Hard tissue access (bone, teeth) |
Key Performance Requirements
| Parameter | Requirement | Test Method |
|---|---|---|
| Sharpness | Low insertion force, smooth tissue penetration | ASTM F1996 penetration test |
| Dimensional Accuracy | OD ±0.01mm, length ±0.1mm | Laser micrometer, optical measurement |
| Patency | No obstruction, consistent fluid flow | Flow rate test at specified pressure |
| Bending Strength | No permanent deformation under specified load | ASTM F1996 bending test |
| Breaking Force | ≥50N (varies by gauge) | Tensile testing per ISO 7197 |
| Surface Quality | Ra ≤0.2μm, no burrs, no scratches | Profilometer, visual inspection |
Manufacturing Process
- Tube Selection — Certified stainless steel capillary tube (304/316L/420J2)
- Precision Cutting — Laser cutting to exact length
- Bevel Grinding — Precision bevel (15°-30°) for sharp penetration
- Tip Forming — Pencil point, trocar, cutting, or blunt per specification
- Electropolishing — Ultra-smooth surface for reduced insertion force
- Passivation — Corrosion resistance enhancement
- Cleaning & Packaging — Ultrasonic cleaning, cleanroom packaging
- 100% Inspection — Dimensional, sharpness, patency, visual
OEM Services
- Custom gauge, length, and tip configuration
- Special bevel angles and multi-angle bevels
- Coated needles (PTFE, silicone)
- Needle assembly with hub, stylet, or catheter
- Private labeling and custom packaging
- Full documentation: MTR, CoC, ISO 9001
Request a Quote
Contact us with your puncture needle specifications — gauge, length, tip type, quantity — and receive a competitive OEM quote within 24 hours. Free samples available for testing.
Healsmed
Leading Stainless Steel Capillary Tube Factory. 1,400+ standard sizes IN STOCK & ready to ship worldwide! High precision, factory-direct price.
