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size="5" Medical Lighting. Basic concepts

color="#0000FF"> illuminance, 1



They are lumens per m2 which receives a surface. LUX is the factor that determines the amount of light.

To take criterion in choosing a good look at how many lights should LUX are obtained and how far. This in turn will depend on the power of the lamp, the quality of optics and the greater or lesser concentration of the light beam.

Measures recommended:

For reading and recognitions. . . . . . . . . . . . . . . . from 500 to 3,000 lux / 0.5 m.

For small cures. . . . . . . . . . . . . . . . . . . . . . . . . lux/50 of 3,000 to 25,000 cm.

For minor or outpatient surgery. . . . . . . . . . . . . lux/80 of 25,000 to 80,000 cm.

For high surgery (Operating Room). . . . . . . . . . . . from 60,000 to 125,000 lux / 1 m.

2 nd increases in temperature-cold light



For any medical specialty is very important that the increase in temperature in the illuminated area is as small as possible. Clearly, the heat can be very harmful, facilitates any infectious process and produces dryness. Temperature increases are considered acceptable:

For small recognitions and cures. . . . . . . .12 º C with the focus to 60 cm.

For minor or outpatient surgery. . . . . . . . . . . . .12 º C with the focus to 80 cm.

For high surgery (Operating Room). . . . . . . . . . . .16 º C with the focus to 1 m.

It is also important to assess the increase in temperature to 10 cm. the focus, especially for surgical lamps, as their working position is often very close to the head surgeon.

What is the Light cold? It is one that does not provide heat. Not to be confused with the tone or color temperature of light (warm-white-blue). The term halogen lamp cold light may be used only for those luminaries that prevent the emission of heat through filters, fiber optics or an efficient cooling. The temperature control is the most technical and most determines the quality of a luminaire for medical use.

color="#0000FF"> 3 eighth apparent color OF LIGHT OR color temperature



It is the tone of light from a light source and is measured in degrees Kelvin (K).

The most appropriate tone for the medical examination is between 3,200 and 4,500 th K. In this interval gives a very white and clear tone that provides great fidelity to the colors. A shade above the 4,500 th K is "almost blue" and distorts the color of the tissues. A very warm tone, for example the 2,700 th K of an incandescent lamp, "yellow" skin tones or the area observed and, therefore, can also distort the diagnosis.

color="#0000FF"> 4 th performance chromatic



It is the ability to distinguish between different colors. It expresses the unity "Ra". It is a percentage of 0 to 100. The sun gets a factor Ra = 94%. Values between 80 and 90 can be considered good. Very good from 90.

Halogen lamps usually have very good colour reproduction. With proper filters can reach 99%. The color you get better performance with a lamp whose light beam moves in the wider range of wavelengths. Each color has a specific wavelength and the target is the sum of all.

color="#0000FF"> 5 th mobility of the luminaries



For the medical professional is essential to be able to concentrate on their work. All instrumental and aparataje has observed a perfect ergonomics to facilitate its work. In the case of luminaries, in addition to comfortably meet with the functions already discussed, the positioning of the same has to be simple, convenient, fast and accurate. Avoid systems articulation unreliable designs and "dirty". The articulated arm systems with steel springs offset by domestic steel tempered offer reliability difficult to overcome. Rozami systems and counterweight to work well but can not afford the same benefits.