Abstract: A device for forming an inserting hole comprising at least two tubes having different outer diameters, and at least one of a guide wire and a sticking needle. A largest diameter tube has at its thick-walled end at least one longitudinal and approximately linear tearing line. The largest diameter tube, after being inserted into the body, can be torn using the tearing line and fixed to the skin of a patient by sewing a folded portion of the tube on the skin. The tube is not moved by the breathing or pressure since it is fixed to the skin. When the tearing line is formed by an ultrasonic cutter, width of the tearing line can be made narrow thereby preventing adhesion of bacteria to a cut portion and unexpected opening of the tearing line in the body.

Abstract: A device for removing a mucus from a uterocervical canal of an animal which comprises a tubular catheter made of a soft synthetic resin and a suction means for producing a sucking force in the inner cavity of the catheter and which is inserted in the catheter and movable lengthwise, said catheter being provided with 5 to 24 holes communicating with the inner cavity thereof, said holes distributing substantially uniformly in a portion between the tip of the catheter and a position at about 10 to 15 cm's distance from the tip of the catheter. The device has an excellent capability of removing a mucus from a cervical canal of a fertilized animal.