An instrument (10) configured to prepare and safely place an intra-uterine device (30) in uterus (50) of a woman, the instrument (10) comprising a “T” shaped intra-uterine device (IUD) (30) with both arms (34) foldable away from a stem (33) of the IUD (30), a graduated tube (16), a push rod (17) inside the graduated tube (16), a dynamic stopper (20), a string management arrangement (110) whereby a string (31) of the IUD (30) is in one of a locked condition or an unlocked condition, a base (70), a cover (90), a carriage (140), an operating knob (150), and the graduated tube (16);
- the dynamic stopper (20) slidably resides in the base (70) and can slide by a sliding length (23), an operator end (6) of the graduated tube (16) is slided through the tubular channel (22) of the dynamic stopper (20), till the operator end (6) of the graduated tube (16) is disposed firmly in a larger diameter part (153) of the operating knob (150), the dynamic stopper (20) rides on the graduated tube (16), a hanging tubular construction (152) of the operating knob (150) resides in a travel slot (143) of the carrier (140), the push rod (17) resides inside the graduated tube (16) with a reversible collapsible fitment means (19) of the pushrod (17) pushed in a pushrod passageway (147) such that a collar (18) of the pushrod (17) sits in a seat (146) of the carrier (140);
- characterized by, the dynamic stopper (20) having a stretchable diameter (26A) of a circular channel (22A) with a slit (26B) on either side,
- the string (31) of the IUD (30) provided with an obstruction means (31A) which is one of an unopenably tight knot, a kink and a small bulge, and
- an inner chamfer (11B) at the IUD end (5) of the graduated tube (16) forming an inner edge (11A);
- the string management arrangement (110) comprising a barrier (160) located on the base (70) towards the operator end (6) and having an alternative hole (76A), an alternative plug (144A) integrally disposed on a front region (164) of an additional wall (163) of an extension (161) integrally disposed along on the carriage (140), the alternative plug (144A) located on the carriage (140) such that, when the carriage (140) is assembled on the base (70), the alternative plug (144A) it is axially aligned with the alternative hole (76A), the alternative plug (144A) tapered towards its end;
- the obstruction means (31A) of the at least one string (31), which is the unopenably tight knot, slipped through the alternative hole (76A) of the base (70) towards the operator side (6), the alternative plug (144A) tight fitted in the alternative hole (76A) while the at least one string (31) is taut, the obstruction means (31A) is thereby trapped towards the operator side (6), keeping the string in the locked condition;
- when the operating knob (150) is made to slide towards the IUD end (5), the graduated tube (16) travels towards the IUD end (5), the dynamic stopper (20) also travels by a sliding length (23) while the graduated tube (16) engulfs the arms (34) of the IUD (30) till the inner edge (11A) of the graduated tube (16) obstructs and stops the dome shaped ends (36) of the arms (34) at a position when the inner chamfer (11B) constrains the faces (36A) to butt mutually against each other, a further sliding of the operating knob (150) towards the IUD end (5) causes the carrier (140) to also move towards the IUD end (5), and consequently the pushrod (17) also correspondingly moves, the alternative plug (144A) now gets disengaged from the alternative hole (76A), the obstruction means (31A) is untrapped, the string (31) is also consequently untrapped from an in-between of the alternative plug (144A) and the alternative hole (76A), and the string (31) is in the unlocked or the released condition;
- and a forward and a backward movement of the operating knob (150) by a sliding force on a thumb surface (159), a single hand grips the instrument (10) as well as moves the knob (150) by a thumb of the same hand.