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Medical Blades and Needles Sharpness Tester
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- Commodity name: Medical Blades and Needles Sharpness Tester
STX-601
Medical Blades and Needles Sharpness Tester - STX-601
Overview
The LabStone STX-601 is a precision laboratory instrument designed to objectively and quantitatively measure the sharpness and tip strength of surgical cutting instruments and needles. By replacing subjective "feel tests" with quantifiable force data, this tester is a critical component of quality assurance and regulatory compliance in medical device manufacturing.Why Sharpness Testing Matters (Clinical Significance)
The sharpness of medical instruments directly impacts patient outcomes, procedural success, and brand reputation. Objective sharpness testing provides measurable benefits across the healthcare value chain:Minimizing Patient Trauma & Discomfort: Extremely sharp blades and needles require less insertion or cutting force, which minimizes tissue damage, reduces patient pain, and promotes faster recovery.Ensuring Surgical Precision: Sharp instruments provide surgeons with superior tactile control, enabling accurate incisions and delicate maneuvers with minimal resistance.Enhancing Safety & Treatment Effectiveness: Poorly manufactured or dull needles can lead to complications, reduced therapeutic efficacy, and an increased risk of instrument failure or needlestick accidents during use.Objective, Data-Driven Quality Control: The STX-601 replaces subjective assessments (visual inspection or manual "feel") with precise, repeatable data (force in Newtons or grams), bringing scientific rigor to an otherwise difficult-to-quantify parameter.Function
Testing the sharpness and tip strength of medical blades and needles.
The primary purpose of a Medical Blades and Needles Sharpness Tester is to objectively and quantitatively measure the sharpness of surgical cutting instruments and needles. This process is a critical part of quality assurance in the manufacturing of medical devices.
Working Principle
The STX-601 medical blade and needle sharpness tester is a special device used for testing the sharpness and strength of various medical needles, including surgical suture needles and acupuncture needles. It uses the method of cutting medical suture lines to measure the sharpness of the needle edge, piercing aluminum foil to measure the sharpness of the needle tip, and pressing against a steel block to measure the strength of the medical needle. It consists of an intelligent controller, a force measuring mechanism, a large-screen LCD display, a printer, etc. The screen uses full Chinese display, and the cursor is controlled by the keyboard for options, operations, and settings. The operation is simple and convenient, with functions such as automatic positioning of cutting points and automatic speed adjustment. The test force curve of the needle is displayed in real time. Compliant.
Compliant Standards:
ISO 7864:2016 -Sterile hypodermic needles for single use -Requirements and test methods(sharpness and tip strength)
ASTM F2878-10(2018) -Standard Test Method for Hypodermic Needle Penetration Resistance
ISO 9626:2016 -Stainless steel needle tubing for the manufacture of medical devices(mechanical property reference)Product Features
- Ultra-High Precision: Force measurement error as low as 0.001 N with 0.5 accuracy grade and 50 Hz sampling speed, capturing even microscopic variations in cutting and penetration forces;
- Intelligent Automation: Automatic return, automatic positioning of blade/needle test points, and programmable speed adjustment ensure repeatable, operator-independent results;
- Real-Time Force Curve: Large LCD screen (320×240) displays the live force-displacement curve, allowing immediate visual assessment of sharpness and tip behavior;
- Multi-Mode Safety Protection: Multiple safety interlocks protect the operator and prevent damage to the high-precision force sensor during high-load compression tests;
- Group Testing & Statistics: Run multiple specimens and automatically calculate Max, Min, Average, and Standard Deviation. Results are printed via the built-in 57 mm micro-printer;
- Professional PC Software: Open database architecture allows unlimited storage, query, and customized report printing. Ideal for batch QC and audit trails;
- Versatile Speed Control: Stepless speed regulation from 0 to 350 mm/min adapts to different needle types, blade sizes, and international test protocols.
Technical Specifications
Name
Parameter
Name
Parameter
Measurement Range
10 N
Accuracy Grade
0.5 grade
Resolution
0.001N
Test Speed
0-350mm/min, stepless speed regulation
Sampling Speed
50 times/second
Computer Software
Yes
Printer
57mm miniature printer
Screen Size
320X240
Host Size
600mm×430mm×400mm
Host Net Weight
35 Kg
Power Supply
AC220V50Hz200W
Significance
The significance of sharpness testing for medical instruments is paramount, as it directly impacts patient safety, comfort, and the success of medical procedures.
Key significance points include:
Minimizing Patient Trauma and Discomfort: Extremely sharp blades and needles require less insertion or cutting force, which minimizes tissue damage, reduces patient pain, and helps ensure faster recovery.
Ensuring Surgical Precision: Sharp instruments provide surgeons and medical professionals with greater tactile control, enabling accurate incisions and delicate procedures with minimal resistance.
Enhancing Safety and Effectiveness: Poorly manufactured or dull needles can lead to complications, reduced treatment effectiveness, and increased risk of accidents or instrument failure during use.
Objective Measurement: The tester replaces subjective assessments (like visual inspection or "feel" tests) with quantifiable data (e.g., force in grams or Newtons), bringing precision to an otherwise difficult-to-measure parameter.Application Industries & Scenarios
Surgical Suture Needles
Edge Sharpness: Cut standardized suture lines to quantify the cutting force of taper-point, reverse-cutting, and blunt needles.Tip Penetration: Pierce aluminum foil to measure the initial puncture force of the needle tip.Tip Strength: Compress the needle tip against a steel block to determine resistance to bending or breakage during tissue penetration.Acupuncture & TCM Needles
Acupuncture Needle Sharpness: Evaluate the penetration force of filiform needles per YY 0166 and GB 2024.Shaft Integrity: Assess resistance to buckling under simulated insertion forces.Scalpels & Surgical Blades
Blade Edge Sharpness: Measure the cutting force of No. 10, 11, 15 scalpel blades against standardized media.Blade-Tang Strength: Evaluate the bond between blade and handle under lateral or axial load.Hypodermic & Injection Needles
Penetration Resistance: Test the force required to pierce synthetic membranes or biological simulants per ASTM F2878.Bevel Geometry Impact: Correlate tip grind angles with penetration force for process optimization.Medical Device R&D and QC
New Product Development: Compare sharpness of prototype needles with market-leading competitors.Incoming Inspection: Screen batches of purchased needles for consistent sharpness before assembly.Regulatory Submission: Generate ISO 7864-compliant test reports for CE marking and FDA 510(k) filings.Frequently Asked Questions (FAQ)
Q1: What is the difference between "sharpness" and "tip strength"?A: Sharpness refers to how easily the needle or blade penetrates or cuts material -measured by the cutting force (against suture lines) or penetration force (through foil). Tip strength is the maximum compressive force the tip can withstand before deforming or breaking -measured by pressing against a hardened steel block. Both are critical: a needle can be very sharp but too weak to penetrate tissue without bending.Q2: Which international standard should I reference?A: For hypodermic and suture needles, ISO 7864 is the primary international standard. For penetration resistance testing, ASTM F2878 is widely accepted, especially in North America. The STX-601 supports both methodologies and automatically calculates the required parameters.Q3: How does the automatic positioning feature work?A: The intelligent controller stores the coordinates of the test medium (suture line, foil, or steel block). After each test, the stage automatically returns to the home position and repositions for the next specimen, ensuring consistent contact point and eliminating manual alignment errors.Q4: Can this instrument test both needles and blades?A: Yes. With appropriate fixtures (included or optional), the same instrument tests suture needles, acupuncture needles, hypodermic needles, and surgical blades. The force range (0–10 N) and speed control (0–350 mm/min) are suitable for all these applications.Q5: What is the purpose of the real-time force curve?A: The live curve shows exactly how the force changes during cutting or penetration. This reveals not just the peak force, but also the force profile -whether the blade bites smoothly or jerks, whether the needle tip is symmetrical, and whether the cut is clean. This visual feedback is invaluable for R&D and failure analysis.Q6: Is the PC software required for basic operation?A: No. The instrument can operate fully standalone using the LCD screen and built-in printer for routine QC. The PC software is recommended for R&D, batch data management, and generating customized reports with statistical analysis.Q7: How often should the instrument be calibrated?A: We recommend calibration every 12 months or per your quality management system requirements. The instrument includes calibration weights and a self-diagnostic routine to verify sensor accuracy between formal calibrations.
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