Closed ostomy bag system

An ostomy bag system comprising:

• an ostomy bag (10) having an upper end, a lower end, and a first surface for laying adjacent a patient with an ostomy stoma, an ostomy opening (12) in the first surface near the upper end of the ostomy bag for communicating with the stoma to receive waste from the patient, the ostomy bag including a second surface that is opposite from the first surface and a discharge passage (14) at the lower end of the ostomy bag, having a first dimension, the discharge passage having a discharge opening (16) for discharging waste from the ostomy bag;
• a first slide fastener portion (18) on each of the first and second surfaces of the ostomy bag at the discharge passage (14), each for connecting to a mating second slide fastener portion;
• at least one nub (22) projecting from the discharge passage (14) for engaging a registration opening to position the first slide fastener portions (18) with the second slide fasteners;
• a vent opening (20) in the second surface of the ostomy bag at or above the ostomy opening (12);
• third slide fastener (21) for closing the vent opening and for being manually opened for opening the vent opening to vent gas from the ostomy bag or to admit flushing liquid into the ostomy bag;
• a waste collecting bag (30) having a receiving passage (34) with a waste receiving opening (36), the receiving passage being larger than the first dimension so that the discharge passage (14) extends into the receiving passage (34) when waste is to be discharged from the ostomy bag to the collecting bag;
• a second slide fastener portion (38) on each opposite inside surface of the receiving passage (34), each for mating with one of the first slide fastener portions (18) for connecting the ostomy and collecting bags to each other at their respective passages to facilitate discharging of waste from the ostomy bag to the collecting bag;
• the receiving passage (34) including at least one registration opening (32) for being engaged by the nub (22) to register the first and second slide fastener portions with each other;
• and
• a fourth slide fastener (40) extending across the receiving passage (34) and on inside surfaces of the receiving passage for closing the receiving passage after it has received waste and any flushing liquid from the ostomy bag so that the collecting bag can be closed for sanitary disposal.