Dynamic Compliance Tester
The patented1 DCT is a dynamic compliance tester and is used to characterize mechanical properties of synthetic or biological vessels.
The DCT uses a calibrated positive displacement mechanism along with pressure and linear voltage to displacement transducers to deliver known volumes and to measure pressures and changes in length. The DCT has a variable speed motor that turns a shaft on which an adjustable eccentric coupler is mounted. The coupler and crank arm assembly converts the rotational motion into linear motion which compresses the bellows. A linear voltage displacement transducer (LVDT) measures the stroke volume of the bellows. The DCT mounting plate and adapters allow for testing of tubes from 1.5mm ID to 50mm ID. This instrument allows for the verification of % radial compliance for testing under the FDA guidelines as well as ISO, AAMI and upcoming ASTM test methods. Determining the frequency response of a vessel or vessel containing a stent can be performed using the DCT by measuring the compliance under physiological conditions (72 bpm and 120/80mm Hg) then monitoring the changes in compliance and in pressure with varying frequencies. This will determine what the optimum testing frequency and pressures are.
1 US Patent # 4,972,721
Advantages of this Tester
• Highly versatile to accommodate a large range of sizes.
• Accurate frequency control.
• Adjustable pressure differentials.
• Ability to measure both radial and length compliance.
• Monitors change in compliance with change in frequency.
• Tests biological or synthetic materials.
• Measures the device and vessel combination.
Limited one year on tester and controller, three months on precision bellows.
Extended warranties available upon request.
• Overall Dimensions: 17”L x 19”W x 41”H
• Power Requirements: 115V AC
• Motor: 1/8 HP
• Dry Weight: 58 lbs.
• Number of Samples:1
• Length of Vessel: Min 3cm / Max 30cm
• Diameter of Vessel: Min 1.5mm / Max 50mm
• Speed: 0.83 to 30Hz
Comparison of Radial Expansion of Stents Within Mock Vessels Molded with a Target Bent Radius Versus Straight Mock Vessels Bent to a Target Radius Ramesh R1, Conti JC2,3, Strope ER1, Thompson M1, Price KS1, Murray D1, 1 Dynatek Dalta Scientific Instruments, 105 E...
Linear Elastic Mechanics of Mock Arteries: Empirical Versus Theoretically Predicted Pulsatile Stent Deflection Biomedical Science Instrumentation, 43, pp. 54-62, (2007) Ramesh Rajesh1, Conti JC2, Strope ER1 1 Dynatek dalta Scientific Instruments, 105 E Fourth St,...
Mock Vascular Compliance During Intravascular Product Testing J. C. CONTI, PH.D. Dynatek Dalta Scientific Instruments, 105 E. Fourth Street, Galena, MO 65656 One of the most interesting topics raised at all standards, regulatory agency, and contractor meetings is...