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. 2018 Aug 27;21(8):e25170. doi: 10.1002/jia2.25170

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© 2018 RTI International. Journal of the International AIDS Society published by John Wiley & Sons Ltd on behalf of the International AIDS Society

This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

PMC Copyright notice

Physical prototypes shown during FGDs. (a) TFPD implant in development, a reservoir device with a biodegradable polycaprolactone (PCL) membrane fabricated using a solvent casting technique. (b) Multiple sizes of TFPD implants in development. (c) Another type of TFPD implant in development, made using an extruded tube fabrication technique. The extruded tube prototype was only shown in 7/8 FGDs in Soshanguve; not available for Cape Town FGDs. (d) Implanon NXT^® contraceptive implant. (e) Model of Implanon NXT^® palpability under mock skin. Note that all TFPD prototypes shown during FGDs contained cellulose powder as placebo in place of active drug. Actual TFPD prototypes include a liquid excipient, resulting in a drug slurry paste within the implant instead of a white powder.