Surgical shadowless lamps are used to illuminate the surgical site to provide an optimal view of small, low-contrast objects at different depths in the cut off and body cavity. Because the operator's head, hands, and instruments can cause disturbing shadows to the surgical site, the surgical shadowless lamp should be planned to eliminate the shadow as much as possible and reduce color distortion to a low degree.

In addition, the shadowless lamp must continue to work for a long time without emitting excessive heat, because excessive heat can make the surgeon uncomfortable and also dry and dehydrate the tissues in the surgical area. The surgical shadowless lamp is a very important lighting source during the operation and is directly related to the success of the operation. In today's chapter, let's talk about the important points of choosing a surgical shadowless lamp.

We need to understand how the surgical shadowless lamp is used under general conditions, and in the preparation stage of surgery, the nursing (perhaps doctor) will move the surgical shadowless lamp to the general orientation of the surgical area. Then turn on the light, at this moment the doctor will generally stand under the surgical lamp, the back of the head is facing the lamp head, and then reach out and grasp the sterile handle in the center of the lamp head, look at the light spot formed by the convergence of light in the surgical area, and slowly adjust the orientation of the lamp head until the surgical field has a more satisfactory lighting environment.

After the initial surgery, the orientation of the general lamp will not change. However, when the cutting depth of the surgical field may change the orientation of the surgical field, it is necessary to adjust, and at this moment the doctor can fine-tune the orientation of the lamp head through the sterile handle, so as to obtain a clearer surgical field illumination. After a long procedure, the nurse (perhaps the physician) removes the lamp head outside the surgical area, removes the sterile handle, and sterilizes it.