FIBEROPTIC PRESSURE SENSORS FOR MEDICAL USE (FABRY PEROT SENSOR) (+)

 

Fiber optic sensors have become increasingly important in medical applications due to their unique properties and advantages.

These sensors employ optical fibers to detect and measure various physiological parameters, offering significant benefits over traditional electronic sensors.At first, the only available method for continuously monitoring pressure in the circulatory system was the fluid-filled catheter method.

This method has several disadvantages, such as poor dynamic response causing damping or overshooting, movement artifacts, or the potential for obstruction.The key advantages of the fiberoptic sensors are as follows.

Small size and flexibility, Fiber optic sensors are thin, lightweight, and flexible, allowing for minimally invasive procedures and integration into small medical devices.

Electromagnetic interference immunity, they are immune to electromagnetic interference, making them safe for use during MRI, Radiofrequency procedures or electrocautery.

Biocompatibility, as Optical fibers can be sterilized using standard medical techniques and are chemically inert and nontoxic.

And, finally, Good dynamic response, minimizing the dumping or overshooting effects.Currently, this technology is used in multiple cardiovascular devices, for example in the Intraaortic balloon pump; in the transaortic microaxial pumps like Impella or Supira device; in the fractional flow reserve measurement; or in the IKOR device, a coronary microcatheter to measure coronary pressure and flow.

Learn more in this video:

 

 

Tag: fiberoptic, pressure, sensor, medical use, Fabry-Perot, interferometer, fluid-filled catheter, advantages, IABP, Impella, Supira, FFR, IKOR, light beam, membrane, diaphragm, photodetector, light source, coupler

 

 

 

IABP PHYSICS, HOW IT WORKS (+)

 

 

IABP PHYSICS: SCROLL COMPRESSOR, SOLENOID VALVE, SAFETY DISC, FIBEROPTIC SENSOR.

The intra-aortic balloon pump (IABP) operates by inflating and deflating a balloon synchronized with the cardiac cycle.
The balloon is connected to a catheter, which is linked to a compressor generating positive and negative pressure.
Helium is the preferred gas due to its low viscosity, facilitating rapid inflation and deflation.
Early IABP models used a piston compressor, but modern versions employ a scroll compressor, offering advantages such as improved efficiency, reduced noise, lower mechanical failure rates, and a more compact size.
The scroll compressor functions by creating two pressure zones—negative at the inlet and positive at the outlet—by moving an orbiting scroll within a fixed scroll.
The system transmits pressure through tubes to a plunger, which displaces helium, inflating and deflating the balloon.

Learn more in the following video:

IMPELLA RP AND RP FLEX FDA ALERT (+)

 

14 Feb 2025, FDA issued a recall about risk of guidewire tip, indwelling central venus line or other medical devices coming into contact with the Impella RP, potentially causing a damage.

Abiomed highlights potential risk of interaction between guidewire tips, central venous lines, or other devices and the inlet of the Impella pumps RP or RP flex during insertion, adjustment, or removal...

Full video:

 

 

Tags: impella RP, impella RP flex, FDA, Alert, guidewire, central venous line, fiberoptic sensor, Placement Signal Not Reliable, alarm, Pump stoppage, Impella Stopped, restart.

 

 

 

 

 

SUPIRA DEVICE (*)

 

The Supira System is an advanced percutaneous ventricular assist device (pVAD) developed to provide temporary mechanical circulatory support during high-risk percutaneous coronary interventions (HRPCI) and cardiogenic shock (CS) cases. Featuring a low-profile, high-flow catheter pump, it aims to minimize vascular complications while delivering full hemodynamic support.
Key features include:
10F insertion profile, expanding to 22F upon deployment
Dual sensor system for real-time aortic and ventricular pressure monitoring
Designed for ≤ 4-hour temporary use in severe coronary artery disease patients

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Tag: SUPIRA, SYSTEM, percutaneous ventricular assist device, Supira Medical, temporary mechanical circulatory support, high-risk percutaneous coronary interventions, cardiogenic shock,low-profile,high-flow, dual sensor, accurate monitoring, MOTOR, catheter, shaft, purge, console, driving, control.

 

 

IABP PHYSICS

 

IABP PHYSICS: SCROLL COMPRESSOR, SOLENOID VALVE, SAFETY DISC, FIBEROPTIC SENSOR.

The intra-aortic balloon pump (IABP) operates by inflating and deflating a balloon synchronized with the cardiac cycle.
The balloon is connected to a catheter, which is linked to a compressor generating positive and negative pressure.
Helium is the preferred gas due to its low viscosity, facilitating rapid inflation and deflation.
Early IABP models used a piston compressor, but modern versions employ a scroll compressor, offering advantages such as improved efficiency, reduced noise, lower mechanical failure rates, and a more compact size.
The scroll compressor functions by creating two pressure zones—negative at the inlet and positive at the outlet—by moving an orbiting scroll within a fixed scroll.
The system transmits pressure through tubes to a plunger, which displaces helium, inflating and deflating the balloon.

Learn more in the following video:

 

Tags: IABP, physics, physiology, balloon, catheter, compressor, synchronization, helium, plunger, disc, scroll compressor, solenoid valve, trigger, fiberoptic, pressure, sensor, fabry-perot, interferometer, reflection, membrane, diaphragm, light,beam, console, photodetector. 

 

 

 

 

IMPELLA COMPONENTS PART 2 (+)

 

Impella cp outlet area.

The outlet area is also referred to as the “pump housing” because this area contains the impeller.

It is located in the proximal portion of the cannula.

It consists of a cylindrical cage structure, designed with six windows and six metal struts.

This outlet cage is the region through wich blood is ejected into the aorta.

The measurements of the outlet area are as follows:

It area has a length of 3 mm

A diameter of 4.6 mm, which is equivalent to 14 french.

It features 6 windows for the ejected blood to exit, each with a width of 1.8 mm.

All of this results in an outlet area of approximately 0.5 cm².

… FULL VIDEO IN OUR YOUTUBE CHANNEL: 

 

TAGS: impella, outlet, pump housing, ejection, chamfered, shear stress, hemolysis, easyguide lumen, guidewire, monorail, fiberoptic, laser, pressure sensor, Fabry-Perot, miniaturization, EMI, struts, capsule, bump, visor