Why Is the Operating Room Cold?
Operating rooms are typically cooler than other areas of the hospital. This often leads patients and their families to ask why is the operating room so cold?
Over time, several explanations have been suggested. Some believe the cool temperature helps control infections, others think it is to keep the surgical team more comfortable, and a few point to other reasons. This article explains why the operating room feels cold and how the temperature affects both the surgical procedure and the patient’s health.
Why Does the Operating Room Feel Cold?
Operating rooms in hospitals often feel cooler than other departments. The temperature is usually kept between 20–23°C (68–73°F). Many people assume this is to prevent infections, but that is actually a common misconception.
In fact, keeping the operating room cold might increase the risk of surgical site infections. When a patient’s body temperature drops, their immune system becomes less effective at fighting off germs.
The Real Reason: Surgeon Comfort and Performance
The cool temperature in the operating room is mainly for the comfort of the surgeon and the surgical team. During a procedure, the team wears multiple layers of sterile clothing, masks, gloves, and sometimes protective equipment, which can cause them to overheat.
In addition, the bright, powerful lights used to enhance visibility of the surgical field generate significant heat. For this reason, it is very important to maintain an optimal temperature in the operating room, to prevent fatigue, loss of focus, and reduced performance among the surgical team.
Keeping the environment cool helps the team sweat less and stay focused without feeling overly hot. This is especially critical during long surgeries that last several hours. However, this same temperature that is ideal for the surgical team can make the patient feel cold.
Other Factors That Make the Patient Feel Cold
Besides the cool operating room environment, other factors can also make the patient feel cold. Fasting before surgery, wearing a thin surgical gown, the stress of undergoing a procedure, and even certain medications can lower body temperature or increase the sensation of cold.
In other words, the question of why the operating room is cold is not just about the room temperature; it involves a combination of physical and psychological factors.
How Anesthesia Disrupts Body Temperature Regulation
Although the cool temperature in the operating room is necessary for the comfort and performance of the surgical team, it can have significant effects on the patient’s body.
When a patient is under anesthesia, their body’s temperature regulation mechanisms are impaired. Peripheral blood vessels dilate, metabolism slows down, and the patient cannot generate heat by shivering. As a result, body temperature may drop by 1 to 2°C (about 2 to 4°F) during the first hour of anesthesia.
If this drop in body temperature (hypothermia) is not controlled, it not only causes shivering and discomfort after surgery but also leads to more serious consequences.
That is why carefully monitoring the patient’s body temperature during surgery is considered an important standard of care under general anesthesia.
The Hidden Dangers of Hypothermia
One of the most important consequences of hypothermia is an increased risk of surgical site infection. When body temperature drops, blood flow to the skin and tissues decreases, which reduces oxygen delivery to the surgical area. This weakens the body’s natural ability to fight germs and increases the likelihood of infection.
How Do They Keep the Patient Warm During Surgery?
Today, various warming devices are used in operating rooms, such as electric heating mats, specialized thermal blankets and insulating garments, to prevent the patient from feeling cold during surgery and to avoid the complications of hypothermia.
Warming systems are another method used to prevent hypothermia in the operating room. One of the most common devices is forced-air warming blankets, such as the Bair Hugger, which blows warm air directly over the patient’s body.
Another highly effective method for maintaining the patient’s body temperature is administering warmed intravenous fluids and blood products. Most fluids and blood products are stored in refrigerators and naturally have a low temperature. Warming them before infusion prevents the patient’s body temperature from dropping and helps maintain normal body temperature.
The Role of the Anesthesiologist
All of these methods are carried out under the close supervision of an anesthesiologist. They continuously monitor the patient’s core body temperature using special sensors and adjust the warming techniques accordingly. This continuous monitoring ensures that the efforts are both effective and safe.
Using these methods, even in a room kept at 20–23°C (68–73°F), the patient’s core body temperature is maintained within the normal range (approximately 36–37°C or 97–99°F). As a result, the patient not only avoids the complications of hypothermia but also experiences less severe shivering and discomfort after surgery.
Conclusion
With the help of this guide, we have found the answer to the question “Why is the operating room cold?” and learned that the operating room is kept cool mainly for the comfort and optimal performance of the surgical team. Nevertheless, using modern warming equipment and techniques, the patient’s core body temperature is maintained. The patient may feel a bit cold upon entering the operating room, but this sensation is temporary and is usually completely resolved once the necessary warming measures are started.