Electroporation is the formation of reversible pores in cell membranes without rupturing the membrane using a high electric field. Electroporation is an important technique for various biomedical applications including drug delivery, gene transfection and therapeutic treatments. A microfluidic device was developed to investigate electroporation using single and multiple pulses. The device contained integrated electrodes inside microchannels. Stained cells were introduced inside the microchannels and excitation pulses were applied. Sequences of images were captured using an integrated-camera on an optical microscope in the bright-field mode. Stained pixel data from the sequences of images were extracted through image processing to detect and quantify electroporation. Flow Index of EP (FIEP) was computed from the normalized (wrt initial) stained pixel data. Multiple pulses increased FIEP when increased energy was delivered, but reduced FIEP when the same amount of energy was delivered. Mean FIEP using 20 V excitation for 1 pulse of 1 ms was 0.256, 10 pulses of 1 ms was 0.329 and 1 pulse of 10 ms was 0.422. These experimental results show that a single pulse is more effective to induce higher FIEP compared to multiple pulses. FIEP enables quantitative and systematic study towards optimization of pulse parameters for electroporation-based applications.

Additional Metadata
Keywords Drug delivery, Electrical pulse, Electroporation, Flow Index of electroporation, Microchannel, Microfluidics
Persistent URL dx.doi.org/10.1117/12.917435
Conference Nanosensors, Biosensors, and Info-Tech Sensors and Systems 2012
Morshed, B.I. (Bashir I.), Shams, M, & Mussivand, T. (Tofy). (2012). Effectiveness of multiple pulses on flow index of electroporation. Presented at the Nanosensors, Biosensors, and Info-Tech Sensors and Systems 2012. doi:10.1117/12.917435