An implantable MEMS micropump system for drug delivery in small animals

作者：Gensler Heidi; Sheybani Roya; Li Po Ying; Lo Mann Ronalee; Meng Ellis^*

来源：Biomedical Microdevices, 2012, 14(3): 483-496.

DOI：10.1007/s10544-011-9625-4

• Drug delivery
• Electrochemical bellows actuator
• Implants
• Micropump

We present the first implantable drug delivery system for controlled timing and location of dosing in small animals. Current implantable drug delivery devices do not provide control over these factors nor are they feasible for implantation in research animals as small as mice. Our system utilizes an integrated electrolysis micropump, is refillable, has an inert drug reservoir for broad drug compatibility, and is capable of adjustment to the delivery regimen while implanted. Electrochemical impedance spectroscopy (EIS) was used for characterization of electrodes on glass substrate and a flexible Parylene substrate. Benchtop testing of the electrolysis actuator resulted in flow rates from 1 mu L/min to 34 mu L/min on glass substrate and up to 6.8 mu L/min on Parylene substrate. The fully integrated system generated a flow rate of 4.72 +/- 0.35 mu L/min under applied constant current of 1.0 mA while maintaining a power consumption of only similar to 3 mW. Finally, we demonstrated application of the system for anti-cancer drug delivery in mice.

• 出版日期2012-6