Controlled delivery devices

Details Controlled delivery devices Controlled delivery devices

1992-09-03

1993-12-14

Page, Thurman K.

Drug, bio-affecting and body treating compositions

Preparations characterized by special physical form

Implant or insert

424400, 424423, 424438, 6048901, A61F 200

Patent

active

052700488

ABSTRACT:
A device for controllably delivering a material into an aqueous medium, the device comprising a soluble portion which is adapted, in use, to dissolve in an aqueous medium thereby to deliver into the aqueous medium a material which is retained in the device, the soluble portion comprising a soluble phosphate glass having a P.sub.2 O.sub.5 content of from 40 to 50 mole %, and constraining means which are located in the vicinity of the soluble portion and which are arranged, in use, to constrain a stationary liquid layer between the soluble portion and the constraining means. The invention also relates to a method of controllably dissolving a soluble phosphate glass in an aqueous medium.

REFERENCES:
patent: 3844285 (1974-10-01), Laby
patent: 4449981 (1984-05-01), Drake

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