316L Stainless Steel Biopsy Needle with Laser-etched Depth Scale and Slotted Design for Precise Tissue Sampling

Price Negotiable

Price: 0.5-20

MOQ: 100 pcs

Delivery Time: 5-8 working days

Brand: yue lin sen

Product Description

316L Stainless Steel Capillary Slotted Scale Puncture Biopsy Needle

The 304/316L Stainless Steel Capillary Tubing Slotted, Graduated Biopsy Puncture Needle is a precision medical instrument designed for accurate tissue sampling and fluid aspiration procedures. Manufactured from medical-grade stainless steel, it features longitudinal slots near the tip for efficient tissue capture and clear laser-etched depth graduations for precise insertion control.

Close-up view of stainless steel biopsy needle showing slot design and graduations

Biopsy needle tip detail showing precision slot machining

Complete biopsy needle assembly with hub and protective components

Medical professional using biopsy needle in clinical procedure

Manufacturing Process

Material Preparation: Selection and cutting of certified 304 or 316L stainless steel capillary tubing to precise specifications
Slot Machining: Precision micro-milling or laser cutting of longitudinal slots near the distal needle end
Tip Formation: Grinding and polishing to create sharp, beveled, or specialized trocar tips for optimal tissue penetration
Laser Graduation Marking: High-precision laser etching of depth markers in centimeter and millimeter increments
Surface Finishing: Electropolishing and passivation for smooth, biocompatible, corrosion-resistant surfaces
Hub Assembly: Attachment of Luer-Lock compatible hub with clear chamber for sample visualization
Stylet Fabrication: Manufacturing matching solid stylets that fit flush with needle tip for insertion
Cleaning & Sterilization: Ultrasonic cleaning, Ethylene Oxide or Gamma sterilization, and sterile barrier packaging

Clinical Applications

Fine-Needle Aspiration (FNA) Biopsy: Sampling of thyroid, lymph nodes, breast, salivary glands, and other masses
Core Needle Biopsy: Tissue core collection from liver, kidney, prostate, and lung using automated or manual biopsy guns
Therapeutic & Diagnostic Fluid Aspiration: Drainage of cysts, abscesses, and joint effusions (arthrocentesis)
Bone Marrow Biopsy & Aspiration: Specialized designs for iliac crest or sternal access procedures
Minimally Invasive Surgical Procedures: Precise tissue sampling during endoscopic or laparoscopic surgery

Technical Specifications

Parameter Category	Specification	Details & Options
Material	Tubing Material	304 or 316L Stainless Steel (Medical Grade). 316L offers superior corrosion resistance for prolonged contact with bodily fluids.
Design Features	Slot Configuration	Single Slot or Multiple Slots near the tip. Slot length typically 10-20mm for tissue entry and fluid inflow.
	Graduation Markings	Laser-etched depth scale in centimeter (cm) and/or millimeter (mm) increments along the shaft.
	Tip Design	Chiba Style (Long Bevel): Common for FNA. Trocar Point: For easier penetration of tougher tissues. Franseen or Westcott: For improved core retention.
Dimensional Specifications	Outer Diameter (Gauge)	Fine Needle Aspiration (FNA): 20G (0.90mm), 21G (0.82mm), 22G (0.71mm), 25G (0.50mm). Core Biopsy: 14G (2.11mm), 16G (1.65mm), 18G (1.27mm).
	Length	Common: 50 mm, 90 mm, 100 mm, 150 mm, 200 mm. Custom lengths available.
	Slot Dimensions	Length: 5-25 mm. Width: 0.3-1.0 mm (proportional to needle gauge).
Performance	Flow/Aspiration Efficiency	Slotted design improves sample yield by preventing tissue plugging and providing alternative inflow paths.
Surface Finish	Internal & External	Electropolished to smooth finish (Ra ≤ 0.4 µm) to minimize tissue drag and friction.
Hub & Connection	Hub Type	Clear or opaque hub with Standard Luer Lock (ISO 594) connection. May include side port for syringe attachment.
Sterility & Packaging	Sterilization	Ethylene Oxide (EtO) or Gamma Irradiation.
Quality & Standards	Biocompatibility	ISO 10993 compliant (Cytotoxicity, Sensitization, Irritation).