Why use shadowless lights in the operating room?

Surgical shadowless lamps are used to illuminate the surgical site for optimal visualization of small, low-contrast objects at different depths in the incision and body control. Since the head, hands, and instruments of the surgeon may cause disturbing shadows to the surgical site, the surgical shadowless lamp should be designed to minimize shadows and minimize color distortion. In addition, the shadowless lamp must be able to work continuously for a long time without emitting excessive heat, which can cause discomfort to the surgeon and dry out the tissues in the surgical area.

Surgical shadowless lamps generally consist of a single or multiple lamp heads, which are attached to a cantilever and can move vertically or in a cycle, and the cantilever is usually attached to a fixed binder and can rotate around it. The shadowless lamp uses a sterilizable handle or a sterilized hoop (curved rail) for flexible positioning, and has an automatic brake and stop function to manipulate its positioning, maintaining a suitable space above and around the surgical site. The fixtures of shadowless lamps can be placed on fixed points on the ceiling or wall, or on the rails of the ceiling.

For shadowless lamps mounted on the ceiling, 1 or more transformers should be set up in the remote control box on the ceiling or wall to convert the input power supply voltage to the low voltage required by most bulbs. Most shadowless lamps have a dimming controller, and some products can also adjust the range of the light field to reduce the amount of light around the surgical site (reflections and flashes from sheets, gauze, or instruments can cause discomfort to the eyes).

Avoid shadows obscuring the surgeon's view.

Because there can be no light and shadow during the operation, it will affect the doctor's operation, and there will be no shadowless lamp.

There are shadows, and the sight is not good. The shadowless lamp can ensure that the light shines from all angles and has a good vision.

In order to avoid shadows getting in the way of surgery.

Because of the fear of ultraviolet light injury to the patient.

SurgeryShadowless lightsThe reasons for the absence of a shadow are as follows:

The surgical shadowless lamp is designed by using the principle of multi-point light source effect, that is, when there are multiple light sources illuminating an object, and the light of some light sources is blocked by the object and cannot illuminate the receiving surface to produce shadows, the light of other light sources will shine on the shadow area from another angle, thereby weakening and eliminating the shadow of this area, and finally forming a shadowless area.

Use. Shadowless lamps in the operating room are used to illuminate the surgical site in order to visualize small, contrasting incisions and at different depths in the body cavity.

Low objects. Since the operator's head, hands, and instruments may cast shadows on the surgical site, the surgical shadowless lamp should be designed to minimize shadows and minimize color distortion.

Shadowless lamps also need to be able to work continuously for long periods of time without emitting excessive heat, which can cause discomfort to the surgeon and can also make surgery difficult.

Tissue drying in the area.

A shadowless lamp is not actually "shadowless", it just diminutes the umbra so that it is not obvious. Shadows are formed when light hits an object. The shadows are different everywhere on Earth.

If you look closely at the shadows under the electric light, you will also notice that the shadows are particularly dark in the middle and slightly lighter around them. The particularly dark part in the middle of the shadow is called the umbra, and the dark part around it is called the penumbra. The occurrence of these phenomena is closely related to the linear propagation of light.

If you place a cylindrical tea tube on the table and light a candle next to it, the tea tube will cast a clear shadow. If two candles are lit next to the tea tube, two shadows will be formed that overlap but do not coincide. The part where the two shadows overlap is completely black, and this is the umbra; The place where there is only one candle next to the umbra is the half-light and half-dark penumbra.

If you light three or even four candles, the umbra will gradually shrink and the penumbra will appear in many layers. The same is true for objects that can produce shadows composed of umbra and penumbra under electric light. Obviously, the larger the area of the luminous object, the smaller the umbra.

If we light a circle of candles around the above-mentioned tea tube, the umbra disappears completely, and the penumbra is too faint to be seen. According to the above principle, scientists have made a shadowless lamp for surgery. It arranges the lamps with great luminous intensity into a circle on the lamp panel to form a large area of light source.

In this way, the light can be irradiated to the operating table from different angles, which not only ensures that the surgical field of vision has enough brightness, but also does not produce obvious umbra, so it is called a shadowless lamp.

The principle of shadowless lights in the operating room is to eliminate the visual impact of the umbra.

To put it simply, if we light a candle next to a cylinder, the umbra of the tube will be particularly obvious, but if we light another candle next to this candle, two shadows will be formed that overlap but do not coincide, and this part of the dark shadow is also called the umbra.

But if you order three, four, or five more on this basis, the umbra will slowly shrink, and if you wrap a candle around the cylinder, the umbra will disappear completely.

The shadowless lamp uses this principle to arrange the relatively large luminous intensity on the lamp plate to form a circle, which becomes a large-area light source, which can meet the needs of surgery.

The reasons for the absence of a shadow lamp during surgery are as follows:The surgical shadowless lamp is designed by using the principle of multi-point light source effect, that is, when there are multiple light sources illuminating an object, and the light of some light sources is blocked by the object and cannot illuminate the receiving surface to produce shadows, the light of other light sources will shine on the shadow area from another angle, thereby weakening and eliminating the shadow of this area, and finally forming a shadowless area.

Use. Shadowless lamps in the operating room are used to illuminate the surgical site in order to view small, low-contrast objects at different depths in the incisions and body cavities. Since the operator's head, hands and instruments may cast a shadow on the surgical site, the surgical lamp should be designed to eliminate the shadow as much as possible and minimize the color distortion as much as possible.

In addition, shadowless lamps need to be able to work continuously for long periods of time without emitting excessive heat, which can cause discomfort to the surgeon and dry out tissues in the surgical area.

The shadowless lamp of the hospital operation, how to make the orange pomace without a shadow. It is because there are more than n lamp head traces on the shadowless lamp, and the Yuanzhou quiet light is reflected many times, so that there is no dark place in the operating room.

In fact, the shadowless lamp is not without shadows, it illuminates the operating table through the lamps of the sleepy friends from different angles, so that the shadows are faint and almost invisible, creating a clear and clear operating environment.

The lighting equipment in the operating room is no stranger to everyone, and the hospital is very important for patients to purchase qualified shadowless lamps, and it can even be said that it is life-threatening. Surgical shadowless lamp is an important lighting tool in surgery, and some main performance indicators must meet the specified standards for qualified surgical shadowless lamps.

The following is the standard of two points of surgical shadowless lamp, first, the most important point is to have sufficient illumination, the illumination of surgical shadowless lamp has reached more than 150000lux, this illumination is close to the brightness under the sun in the case of sunny days in summer, and the actual illumination is generally 40000 100000lux is the most suitable, too bright will affect vision. Surgical shadowless lamps should provide sufficient illumination while avoiding glare from the beam on the surgical instruments. Glare will also affect vision and vision, easy to make the doctor's eyes tired, not conducive to the surgeon to carry out the operation, the illumination of the surgical shadowless lamp and the normal illumination in the operating room should not be too different, some illumination standards stipulate that the illuminance of the overall lighting should be one-tenth of the local illumination is the most suitable.

The overall illumination of the operating room should be above 1000lux.

Second, the shadowlessness of the surgical shadowless lamp should be high, and the shadowlessness is an important feature and performance index of the surgical shadowless lamp.

Any shadow formed in the field of view of the operation will hinder the doctor's observation, judgment and surgery, in addition to providing sufficient illumination, a good surgical shadowless lamp should also have a high shadowlessness to ensure that the surface of the surgical field and deep tissues have a certain luminosity.

In recent years, with the increasing improvement of living standards, people are also paying more attention to their physical health, operating room equipment such as surgical shadowless lamps are certainly in the attention, medical device manufacturers in order to meet the needs of hospitals and the pursuit of better products, the operating room equipment has been better improved and studied, in order to improve the quality of light, has developed and produced the use of hard glass as a reflective surface, can transmit infrared multi-layer dielectric film reflective lens, that is, cold light reflector, its illumination can reach more than 100000lux, The mirror surface of the cold light mirror is coated with multiple layers of high-purity zinc sulfide and magnesium fluoride coatings or titanium dioxide and silica coatings in a vacuum, and the coating is uniform and free of impurities.

In order to meet the needs of doctors, a photometric adjustment device is also set up on the high-illumination surgical shadowless lamp, and the illumination angle of the light can be changed according to the doctor's position and surgical scope.

Due to the straight line propagation of light, when light hits an opaque object, a shadow is formed behind the object. Shadows vary from place to place and at different times. For example, the shadow of the same person in the sun is long in the morning and evening, and short in the noon. 

By looking at it, we can see that the shadow of the object under the electric light is particularly dark in the middle and slightly lighter on the periphery. The darker part of the shadow is called the umbra, and the darker part of the shadow is called the penumbra. The occurrence of these phenomena is closely related to the principle of linear propagation of light.

The following experiment will reveal the mystery. 

We place an opaque cup on a horizontal table top and light a candle next to it, and a clear shadow is cast behind the cup. If two candles are lit next to the cup, two shadows will be formed that overlap but do not coincide, and the overlapping parts of the two shadows are completely black, and therefore completely black. The place where there is only one candle next to the umbra is the half-light and half-dark penumbra. If you light three or even four or more candles, the umbra will gradually shrink and the penumbra will appear many levels and gradually become darker.

The same is true for objects that can produce shadows composed of umbra and penumbra under electric light. Electric lamps emit light from a curved filament, and the light emitting point is not limited to one point. Light coming from one point obscures the object, while light coming from another point is not necessarily blocked.

Obviously, the larger the area of the luminaries, the smaller the umbra. If we light a circle of candles around the said cup, the umbra disappears and the penumbra is too faint to be seen. 

For this reason, the ceiling light in the operating room is composed of several lamps with great luminous intensity arranged in a circle on the lamp plate to form a large-area light source. In this way, the light can be irradiated onto the operating table from different angles, which not only ensures that the surgical field of view is sufficiently bright, but also does not produce obvious umbra and affect the operation. Hence the name "Shadowless Lamp".

There are multiple lights, and the light is shining from different angles, and in fact, there are shadows from every angle, but there is light, and the naked eye can't tell the difference between strong light and super bright light.

Right. Shadows are not formed when illuminated at large angles.

You say I'm copying, and I need proof.

Normal working conditions.

a) Ambient temperature: 5 40

b) The relative humidity is not more than 80%.

c) Atmospheric pressure range 860 1060hpa

d) Power supply voltage: AC 220V 22V, 50Hz 1 Hz

The outer surface of the appearance should be smooth, smooth and uniform, and the transition should be clear and free of obvious defects such as scratches, and the appearance of electroplating parts.

The grade shall meet the requirements of the bright class V specified in YY0076.

The structural connection of the shadowless lamp should be firm and not obviously loose, and the concentrating adjustment should be flexible.

The rotation of each rotating part of the shadowless lamp should be light, and the lamp body part can stably stay in the selected position, and the original position should not be changed without the action of external force.

The rotation range of the shadowless lamp should not be less than the value specified in Table 3, (the sub-lamp lamp should meet the parameters of the corresponding lamp in the table).

The starting force and thrust of each rotation and rotation mechanism of the shadowless lamp shall not be greater than the value specified in Table 4, (the child and mother lamps shall conform to the parameters of the corresponding lamps in the table).

The reverse coating layer of the shadowless lamp reflector is uniform and the structure is firm, and there should be no obvious pinholes, concave and convex, abrasions, water stains, spots and decoating.

The shadowless lamp translucent panel adopts a water ripple structure, which is made of PC material that is resistant to high temperature, anti-fracture and not easy to deform. (KL700-III and KL500-III are transparent flat structures).

Standard requirements for surgical shadowless lamps:

In fact, the essence of the surgical lamp is different from the ordinary lamp is to meet the special requirements of the operation. 1. Lighting brightness requirements for operating rooms, 2. Safe surgical lighting, 3. Requirements for no shadows, 4. Cold light requirements, 5. Requirements for detachable disinfection. Surgical lamps include two series: integral reflection surgical lamp and hole type surgical lamp, and the integral reflective surgical lamp is molecular mother lamp and single lamp; The eyelet surgical light is also available in two specifications: letter lamp and single lamp.

The operating lamp can provide a guarantee for the brightness of the operating room illumination, and the surgeon outside the operating room must be able to accurately distinguish the contour, color and movement, so the light intensity close to the daylight quality is required, the light intensity is at least 100,000 illumination, and the surgical lamp can provide the brightness of a single lamp up to 160,000 illumination, and the brightness of the surgical lamp can be adjusted steplessly, and in case of failure during the operation, the spare bulb can be automatically switched for a time of seconds, so the surgical lamp can provide safe surgical lighting. The surgical lamp can meet the requirements of shadow-free illumination through a multi-sided reflector, and the reflective surface is formed in one pass by industrial stamping, and the reflective rate is 95% higher.