Aakash Bharat
Pronouns: he/his/him
Research Mentor(s): Alvaro Rojas Pena
Co-Presenter:
Research Mentor School/College/Department: Department of Surgery-Transplantation / Medicine
Presentation Date: April 20
Presentation Type: Poster
Session: Session 2 – 11am – 11:50am
Room: League Ballroom
Authors: Aakash Bharat, Navid Shaikh, MS, Joseph Potkay, PhD, Robert Bartlett, MD, Alvaro Rojas-Pena, MD
Presenter: 11
Abstract
A Flow Control System for Gas Flow Control in Wearable Artificial Lung Aakash Bharat; Navid Shaikh, MS; Joseph Potkay, PhD; Robert Bartlett, MD; Alvaro Rojas-Pena, MD Institution: University of Michigan, Ann Arbor Background: Current artificial lung (AL) technologies can provide acute and chronic respiratory support, but none can adjust to the patient’s changing metabolic needs. AL technologies hold a potential to act as bridge to recovery in acute cases & as bridge of transplant in chronic cases of end stage lung disease. Our main project deals with a servo regulator, a portable controller that automatically adjusts carbon dioxide (CO2) removal in ALs. My work is about the development of a gas flow control system in an AL. Methods: We are developing a proportional-integral-derivative (PID) controller to maintain a target exhaust gas CO2 partial pressure by modulating gas flow level & gas concentration through the AL. One master microcontroller will control three identical gas flow controllers, each in controlling flow of the following gasses: O2, CO2, and N2. We have selected the Sensirion SFC5500 Series Flow Controller, which is capable of providing precise flow control up to 10 L/min. We have selected the Texas Instruments RM57L843 series microcontroller to be the master device for interfacing with the three flow controllers. Communication between the microcontroller & the flow controllers is being managed by a translator board which converts serial communication signals from the microcontroller into RS-485 signals. Results: The flow through the three individual flow controllers will be regulated to modulate the concentration of inlet gasses to match the defined target exhaust gas CO2 partial pressure in the outlet of the lung. The ability of the PID controller will be tested by varying the inlet blood partial CO2 level & outlet blood pCO2 level will be measured for individual changes. Conclusion: In conclusion, based on how the partial pressure of CO2 responds to the flow rates in the AL, the broader impact of this research would shed light on how ALs would serve as bridges to recovery and bridges to transplant.
Engineering
