Novel modified vertical diffusion cell for testing of in vitro drug release (IVRT) of topical patches

István Sebe; László Zsidai; Romána Zelkó

doi:10.1016/j.ohx.2022.e00293

Novel modified vertical diffusion cell for testing of in vitro drug release (IVRT) of topical patches

HardwareX. 2022 Mar 11:11:e00293. doi: 10.1016/j.ohx.2022.e00293. eCollection 2022 Apr.

Authors

István Sebe¹, László Zsidai², Romána Zelkó¹

Affiliations

¹ University Pharmacy, Department of Pharmacy Administration, Semmelweis University, Hőgyes Endre Street 7-9, 1092 Budapest, Hungary.
² Faculty of Mechanical Engineering, Szent István University, Páter Károly Street 1, Gödöllő H-2100, Hungary.

Abstract

The vertical diffusion cell is an in vitro laboratory device for the study of drug release and permeation of semi-solid topical formulations and topical patches. Both static and dynamic versions of the diffusion cell are used in practice, the operation of which can be automated. The device is available at a reasonable cost for smaller, mainly transdermal patches, the amount of sampling fluid is replenished at the same time as the sample, in the same amount as the amount sampled without automation of the system, and simultaneous replenishment of acceptor fluid by hydrostatic pressure helps keeping the acceptor chamber bubble-free.

Keywords: Franz cell; In vitro release test; Quality control; Semi-solid formulation; Transdermal patch; Vertical diffusion cell.