In the past, it was believed that lower temperatures reduced the risk of infection. However, subsequent research has demonstrated the exact opposite. In a cold environment, a patient's body temperature drops, leading to a decrease in blood flow to the tissues. When blood circulation decreases, the body struggles more to fight off infection.
The truth we know today is that the primary reason for keeping operating rooms cool is for the comfort of the surgeon and their team. This is because doctors are required to wear thick sterile gowns, masks, gloves, goggles, and sometimes even lead vests during operations. Underneath these layers, the intense heat radiated by the surgical lamps significantly increases the sensation of warmth.
Therefore, if the room is not kept cool, it can result in a temperature that could potentially distract the team in the middle of the operation.