The surgical shadowless lamp is a very important lighting source in the surgical process, which is directly related to the effect of the surgery. In today's chapter, let's talk about the most important key points for choosing a surgical shadowless lamp.
First, we need to understand how the surgical shadowless lamp is used in general.
During the preparation stage for surgery, the nurse (or doctor) will move the surgical shadowless lamp to the approximate location of the surgery area. Then turn on the light. At this time, the doctor will usually stand under the surgical light, with the back of the head facing the light head, then reach out and hold the sterile handle in the middle of the light head, and watch the light converge (light spot) in the surgical area. Slowly adjust the position of the lamp head until the surgical field has a satisfactory lighting environment.
After starting the operation, the position of the general light does not change. However, when the depth of the incision in the surgical field or the position of the surgical field changes, it needs to be adjusted. At this time, the doctor can fine-tune the position of the lamp head through the sterile handle, so as to obtain clearer illumination of the surgical field.
Finally, after a long operation, the nurse (or doctor) removes the lamp head outside the operation area, removes the sterile handle, and disinfects it.
As can be seen from the above process, the main users of surgical shadowless lamps are doctors and nurses. Before and after each surgery, the nurse needs to move the surgical shadowless lamp over long distances. For doctors, during the operation, no matter whether they are the master or the assistant, they basically stand under the surgical shadowless lamp and have close contact with the surgical shadowless lamp for a long time.
So how to choose the right surgical shadowless lamp? We think generally the following four aspects can be considered:
Safety is always the most important indicator of medical devices, and there is no such thing. The security here refers not only to the product itself, but also to the security of the product for users and objects of use.
The safety of the product itself will not be described in detail here, because the current domestic and foreign standards involved in surgical shadowless lamps are very mature, and some domestic testing standards are slightly higher than European standards. Most manufacturers have high export standards for medical devices, so there are few product safety issues.
However, it is not uncommon that the installation is not in place due to the overly complex design, or that the training is not in place, causing problems during use.
For example, in the two most common cases, some halogen lamps suddenly flicker, go out, or dim in brightness during the operation, resulting in blurred and unclear surgical field.
It is due to the failure to replace the halogen lamp bulb in time, or because the connector is not installed in place; also, the cantilever assembly cannot be fixed, and drift occurs during the operation, resulting in the inaccurate positioning of the lamp head, mainly due to the cantilever assembly or installation and fixation The components are not installed properly.
It can be foreseen that if the surgical field is blurred or the surgical field is drifting during the operation, it will have a huge impact on the main doctor, and it may directly or indirectly cause the failure of the operation. Therefore, safety awareness requires us to always alert in our daily work.
2. Appropriate lighting environment
In addition to safety, the most important thing should be to provide a good lighting environment. After an operation, the doctor will stare at the surgical field attentively for more than 90% of the time, and other medical staff will also check the situation of the surgical field most of the time. A suitable lighting environment can allow medical staff to "see clearly and see for a long time".
"Seeing clearly" means being able to see clearly. For surgical operation, "seeing clearly" can be interpreted as the color is not distorted, the tissues and organs can be distinguished, and there is no shadow.
During the operation, it is a prerequisite for the color to remain unchanged for a long time. For example, red is red. If it is illuminated by a light source, the original red will be changed into another color, which will inevitably cause the doctor to make mistakes in judgment; When the incision is deep, organs and blood vessels are easy to stick together, and the colors are similar, so it is generally difficult to distinguish; also, in the case of deep incision, due to the occlusion of surgical instruments, a part of the shadow may be formed inside in the deep cavity, which obstructs the doctor's sight.
If you want to "see clearly", the surgical shadowless lamp can meet these requirements by maintaining a constant color rendering index, adjusting the color temperature, and having a high shadowless effect.
"Looking for a long time" means looking comfortable and looking for a long time. For the doctor, the light spot formed by the surgical field is relatively soft and does not flicker, which can effectively reduce visual fatigue and prolong the doctor's working time; in addition, the doctor is standing under the lamp for a long time, and there is a Part of the light that is directly irradiated on the back of the head. If the heat generated by the lamp is high and the light emitted is not shielded from infrared rays, the temperature of the doctor's head will increase, which will of course make the doctors uncomfortable, and may cause the temperature of the surgery field for the patient increase, which may cause serious loss of body fluids, causing danger.
However, the lighting environment depends on the light source in the final analysis. With the innovation of technology, surgical shadowless lamps have developed from halogen lamps and xenon lamps to the latest LED lamps. The changes in the light source have also improved the lighting environment. Due to space limitations, we can discuss this topic later.
3. Convenient, flexible and accurate operation
Before and after the operation, the lamp head needs to be able to move in and out of the surgical area quickly and easily; during the operation, the lamp head can flexibly adjust the angle and position according to the needs of the doctor, and it also needs to keep accurate during the long-term operation. position, without the aforementioned "drift".
Under normal circumstances, the lamp head part of the surgical shadowless lamp is relatively large in size and weight. Therefore, in order to achieve convenient, flexible and accurate operation, the design and requirements of the lamp head and cantilever assembly are very strict. The lamp head should reduce the volume and weight as much as possible under the premise of providing a suitable lighting environment, and the shape design should also reduce the impact on the laminar flow of purification as much as possible; the cantilever assembly should be safe to carry the lamp head on the premise to ensure its movement Convenience, swivel flexibility and precise positioning while taking up as little space as possible.
At present, the lamp head design of basically each brand is unique, and most of the cantilever components are imported mainstream brands to ensure their quality and function. In a future article, we can introduce it to you.
In addition to the above major aspects, some manufacturers have their own unique designs, which make the surgical shadowless lamp more convenient to use and have a longer lifespan. Since each brand has its own unique functions, and these icing on the cake are basically extensions of the above three important aspects, we will not introduce them here.