A system and associated method is used for warming an endoscope, laparoscope, or other such instrument to minimize fogging. A flexible pad has a length, a width and a periphery for wrapping around the instrument and a plurality of separate chambers defined through partitions. Each of the separate chambers includes an activation disc and a mixture of water and sodium acetate to generate heat through an exothermic reaction initiated through manual manipulation of the disc for that chamber. The pad is preferably made from two plastic sheets of substantially equal size, with the chambers being formed by heat-sealing or otherwise bonding the periphery of the sheets and the partitions. At least some of the partitions establish lengthwise and/or widthwise fold lines in the pad. At least one of the partitions may include a gap to facilitate fluid transfer of the mixture. The disc is preferably made of perforated stainless steel. A housing may be provided to contain the pad in sleeve form, and an optional heat-conductive tube may be used to receive the instrument around which the pad is wrapped.

A preheating device for endoscopy includes a flexible bag, a plurality of first welded joint, and a mark member. The flexible bag is disposed with a saturated sodium acetate solution and a trigger. The flexible bag includes a closed circumference around the outer periphery thereof. The closed circumference includes a longer side and a shorter side next to each other. The plurality of the first welded joint is arranged into a folding line along a longitudinal direction, wherein every two adjacent first welded joints of the folding line forms a flowing space. The folding line is substantially parallel to the longer side. The first welded joint nearest to the shorter side is the last first welded joint, and the mark member is disposed on the flexible bag between the last first welded joint and the shorter side. The mark member is used for indicating a placement of an endoscopy.

A system and associated method are used for warming an endoscope, laparoscope, or other such instrument to minimize fogging. A flexible pad has a length, a width and a periphery for wrapping around the instrument. An activation disc and a mixture of water and sodium acetate are used to generate heat through an exothermic reaction initiated through manual manipulation of the disc. The disc may be exposed in a flexible tab in fluid communication with the pad. A housing includes an end bore to receive the instrument such that the instrument is surrounded by the folded or rolled pad within the housing. The housing may further include a slit or narrow opening enabling the tab and activation disc to extend therethrough and outside the housing for activation.