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Darius A. Przygoda, Ph.D. Medical Design Solutions, Inc. V.P. of Electrical Engineering, Partner Senior Medical Design Consultant Hardware & Embedded Firmware

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Work Experience (recent important projects)


Medical projects:

• Venous ulcer treatment device.
  Wearable electro-mechanical device intended for use in the treatment of venous ulcers. The device can communicate with a smart phone which acts as an electronic controller circuit providing control of the device, as well as monitoring and data acquisition during treatment.
  Defined system architecture, designed device hardware, developed firmware for wireless charging module and data storage system, created relevant documentation. Took part of supervision of required regulatory tests.
  

• Venous ablation system.
  The system consisted of stationary console (power generator), and disposable intelligent catheter with a handle.
  Defined system architecture, designed hardware and developed firmware for power delivery console and disposable catheter for treatment of dilated veins, created relevant documentation. Took part of supervision of required regulatory tests.
  Patent: Venous Disease Treatment (pending, US2015022849, co-inventor).
  

• Vascular pressure measurement device (FFR microcatheter) for measuring patient systemic pressure variation.
  The device consisted of the microcatheter with dual polymer capacitive pressure sensor, and data acquisition microcontroller based device communicating with the real time logging application running in PC environment.
  Defined system architecture, designed hardware and developed firmware for lock-in amplifier based measuring device.
  Patent: Systems and Methods for a Low-Profile Vascular Pressure Measurement Device, pending, A/N 13/840505, co-inventor).
  

• Wireless ECG system.
  The system consisted of constellation of battery powered wireless ECG sensors and one wireless-equipped dedicated stationary sensor. The stationary sensor was connected to the PC computer which collected and processed data coming from the wireless sensors.
  Defined system architecture, designed hardware and developed mixed language firmware (C and Python) for floating and stationary sensors.
  

• Wireless wearable vitals monitor.
  The device (called eShirt^®) was continuously monitoring patient's vitals (ECG, posture, respiration, temperature, etc.), and wirelessly transmitted them to the iPhone type smart phone. Processed data could be stored and/or transferred in real time to the monitoring web site.
  Defined system architecture, designed hardware, took part in firmware development.
  

• Epidural needle guidance system.
  Optical device allowing the surgeon to precisely define the moment of entering epidural space during lumbar puncture. Wireless device connected to the needle sent data via Bluetooth to the PC computer allowing for monitoring progress of the procedure.
  Defined system architecture, designed hardware and developed firmware for the wireless device for controlling insertion of an epidural needle.
  

• Gastric restrictor (implantable device).
  The Gastric Restrictor system consisted of implantable device remotely adjusting the gastric band (lap-band), external module for powering and controlling the implant, and the intelligent gastric band port.
  Designed hardware and took part of firmware development for the implantable wireless gastric restrictor band, designed hardware and developed firmware for intelligent gastric band port.
  

• Skin light therapy device “Roadrunner”.
  A device delivering light radiation of specified wavelength, intensity and modulation to calf and foot areas.
  Led and managed project from feasibility phase to prototype phase, actively participated in h/w and s/w design and development, supervised FDA required regulatory tests.
  

• Iontophoresis based drug administrating system.
  The device was designed for electromotive drug administration (non-invasive delivery of a medicine or other chemical through the skin).
  Managed technical aspects of the program, hardware design, software architecture design, and was a part of implementation process.
  

Commercial projects:

• Measurement System Rabbit 2.
  The system, designed for use in the small EE lab, consisted of:
  
  • Logic analyzer (8 input channels registering signals up to 100MHz).
  • Programmable pulse generator (8 individually programmed synchronized output channels, 10ns min pulse length).
  • Data logger (4 input channels, +/- 10V max input signal, touch screen, communication with PC computer via USB channel).
  Designed hardware, wrote microcontroller firmware, built and brought up prototypes.
  

• Diode and LED tester.
  The tester was designed to automatically analyze array of diodes (such as multi-color LED arrays or bridge rectifiers) and display configuration on the LCD graphic screen, and test characteristic of each of the diodes individually.
  Designed hardware, developed diode net analyzing algorithm, wrote microcontroller firmware, built and brought up prototype.
  

• Logic probe.
  A pen device for checking signal logic levels. The device worked up to 40MHz signal frequency, allowed for adjustment of low and high signal thresholds, had built-in pulse counter.
  Designed hardware, wrote microcontroller firmware, built and brought up prototype.