Abstract: A fluid flow controlling device having a working member capable of reciprocating in a tubular case. The working member comprises a pressure detecting portion to detect the pressure of a second fluid, which flows into the tubular case through a second inlet, and to move the working member forwards; and a valve element to decrease the opening of the first outlet in relation to the opening of the first inlet, through which the first fluid is led into the tubular case, in correspondence with the displacement of the working member. By the use of the above fluid flow controlling device, it becomes easy to control the quantity of the first fluid led into the tubular case in relation to that of the second fluid, and it becomes possible to sufficiently supplying the first fluid to the tubular case even when the second fluid is exhausted and cannot be supplied any more so long as the first fluid is not exhausted.

Abstract: An access port for use in a medical vessel comprises an inner frame (15) detachably mounted on an opening of a transparent hood (13) of the infant incubator. An outer frame (16) is slidably engaged to said inner frame (15). A flexible sheet (14) has one end connected to said inner frame (15) and another end connected to said outer frame (16). It is characterized in that a stopper (36) is carried by said outer frame (16).Another access port for use in a medical vessel comprising: a frame (52) having an opening (56); a horseshoe plate (58) pivotally supported on the frame (52) to open or close said opening (56); a lock mechanism (78) for locking said horseshoe plate (58) in situ which is closed; an inner side (66) provided on the horseshoe plate (58); a plurality of resilient pieces (72) mounted to said horseshoe plate (58) to close said inner side (66); and a holding means (74) provided on the horseshoe plate (58) to hold a member inserted through said plurality of resilient pieces (72).