초록 ▼

An intravaginal contraceptive system for the pre-programmed, unattended delivery of an antifertility steroid is disclosed. The system comprises (a) an antifertility steroid, (b) a delivery module comprising a reservoir for storing the steroid in an amount for execution of the program, a rate control

An intravaginal contraceptive system for the pre-programmed, unattended delivery of an antifertility steroid is disclosed. The system comprises (a) an antifertility steroid, (b) a delivery module comprising a reservoir for storing the steroid in an amount for execution of the program, a rate controller which maintains the rate of steroid delivered in a contraceptive effective amount throughout the life of the system, an energy source for transferring steroid from the reservoir to the vagina, and a portal for releasing the steroid from the module to the vagina, (c) a platform which integrates the module into a unit sized, shaped and adapted for insertion and retention in a vagina, and (d) a contraceptive program which provides for the controlled release of steroid to produce an antifertility effect over a prolonged period of time.

대표청구항 ▼

An improved vaginal contraceptive system for delivering an antifertility steroid, comprising: (a) a body sized, shaped and adapted for easy insertion and comfortable retention in the vagina, said body comprising; (b) a shaped wall surrounding and forming a reservoir; (c) an antifertility steroid sel

An improved vaginal contraceptive system for delivering an antifertility steroid, comprising: (a) a body sized, shaped and adapted for easy insertion and comfortable retention in the vagina, said body comprising; (b) a shaped wall surrounding and forming a reservoir; (c) an antifertility steroid selected from the group consisting of progestational and estrogenic steroids in the reservoir; (d) a liquid carrier permeable to the passage of steroid and containing an amount of steroid for prolonged release in the reservoir; (e) the improvement comprising forming the wall of non-toxic, vaginally acceptable release rate controlling thermoplastic styrene butadiene block copolymer permeable to the passage of steroid; and, (f) wherein the system when in operation and placed in the vagina releases at a controlled rate a contraceptively effective amount of steroid over a prolonged period of time to produce the desired antifertility effect.