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Medical applications: Thickness  Measurement of Balloon Catheter

               Catheter baloons come is various shapes and sizes. They are one of the basic tool for many medical procedure, like angioplasty. Baloons are manufactured from  polymer tubes with original wall thickness of 0.12mm to 0.5mm. Single wall thickness of the balloon, radially expanded in the mold during manufacturing, is 0.012 to 0.050mm.  The wall thickness has certain profile along the length of the baloon. This ensures the correct distribution of pressure.For example, angioplasty balloon has thinner wall in the center to have increased pressure in that area.  The thickness of the baloon wall needs to be measured  at different points: MProbe 40 MSP system makes it easy. The measurements are non-contact and are  done in a small spot – 0.040 to 0.008mm – depending of the diameter of the balloon. Thickness  measurement of the  baloons in inflated state  gives the best contrast. But thickness measurement of deflated balloon is also possible. Measurement results are precise and instant. 

Why use MProbe 40 MSP?

  • small spot  is required for balloon wall  measurement. Typically, ~10 μm  to  40 μm spot size is used dependindg on balloon diameter and material. MProbe MSP system has up to 4 objectives and calibration can be stored for different configurations.
  • Image of the measurement site and the reticle indicating the exact location of measurement makes it easy to navigate to desired location.
  • Results can be displayed directly on the image.
  • Vis system (400-1000 nm) or VisHR system (700nm -1100nm) wavelength range can be used for these measurements. The selection depends on the wall thickness and material.
  • Quick and easy measurement can be performed by technician
  • MProbe MSP is affordable,  non-contact optical measurement system it  can be customized for automated measurements 

MPROBE 40 VIS-MSP:  measurement of catheter balloon wall thickness

 Raw reflectance spectrum of the catheter balloon wall using Visible (Red) and VisHR (blue) systems.Interference fringes in the spectrum indicate a good signal in both cases.

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