mostly this apparatus is use for sticky material and control release drugs
Yes in dissolution study many time flow through dissolution is use because of from this apparatus we provide time to time fresh dissolution media to our drug , also sampling for analysis of drug dissolution is easier compare to type I & type II apparatus and also this apparatus used as fully automated
flow through dissolution study is used for the controlled release dosage forms,since apparatus are fully automated easy to handle,and analyse with minimum errors
Flow through dissolution apparatus is mostly used for poorly solubel . Mainly for soft gelatin capsules,extent release tablet, microspheres etc.All these have stability problem ,to maintain its solubility & stability we use these apparatus.