Abstract: To provide such a medical tube that a position of a distal end part thereof is easily detectable from an outside of a body of a patient, regardless of orientation of the distal end part inserted into the body. A medical tube including: a main body part having a tubular shape; at least one opening formed in a side face of a main body part; and a light transmitting part formed at one end of the main body part, the light transmitting part having a hemispherical face shape, the light transmitting part being configured to emit light from a light source.

Abstract: There is provided a bag for use in a microwave oven enables heat/pressure cooking, and a heat/pressure cooking method using the bag. The bag is formed by sealing a peripheral edge part of a pair of sheet members forming an upper surface and a lower surface, wherein the bag has a pressure releasing mechanism for making a part of the bag open to release pressure inside the bag to the outside so as to reduce the pressure when the pressure inside the bag rises and exceeds a predetermined value higher than atmospheric pressure, and the pressure releasing mechanism has a pressure keeping function for keeping the pressure inside the bag at least higher than atmospheric pressure even after the release of the pressure inside the bag.