Presentation is loading. Please wait.

Presentation is loading. Please wait.

Infrared Radiation, Microwave, Ultraviolet Radiation.

Similar presentations

Presentation on theme: "Infrared Radiation, Microwave, Ultraviolet Radiation."— Presentation transcript:

1 Infrared Radiation, Microwave, Ultraviolet Radiation.

2 Infrared Infrared lamps emits electromagnetic radiation within frequency range  heat absorbed by the matter. IR is emitted by many sources (e.g. the sun).

3 Physical Characteristics
IR radiation has wave length of 770 nm to 1 mm. Part of EM spectrum lying between visible light and microwave. Divided into 3 bands: 1- IR-A: 770 to 1400 nm 2- IR-B: 1400 to 3000 nm 3- IR-C: 3000 to 106

4 Types of IR radiation (Used clinically)
Luminous (visible) Non luminous (invisible) IR lamps available emit radiation of wave length 780 and 1500 nm.

5 Physical Behavior of IRR:
Reflected Absorbed Transmitted Refracted Diffracted

6 Physiological Effects of IRR:
Metabolic effect: Increases metabolic activity. Circular effect: Increases blood flow superficially. Neurological effects: Increases nerve conduction velocity. Cellular effects: Increases elastic fibers in upper dermis. Increases ground substance. Alters composition of amino acid proteins.

7 Clinical (Therapeutic) Effects of IRR:
Pain Muscle spasm Joint stiffness Tissue healing Circulation Edema Skin lesion Others: before stretching, mobilization, traction, massage, exercises, E.S. , bile pigments.

8 Modes of Heat Transfer Dosage
Radiation (lamp to body) Convection and conduction ( through the body) Dosage Sensory report of the patient ِAdjusted by: Changing power output of the lamp Distance of lamp Angle of incidence

9 Time of Application 10 – 20 minutes.

10 Microwave E.M.R. between the radio waves and infrared.
Wavelength between 1 m and 1 cm. Frequency between 30MHz – 30GHz. Available since 1930 Effective method of heating (highly vascular tissue)

11 Production of M.W. High frequency oscillating current.
Magnetron to generate oscillating currents directly from high velocity electron motion. Coaxial cable. Antenna (emitter). Intensity control. Meter mean of switching. Can be continuous or pulsed.

12 Ultraviolet Radiations
Physical properties of U.V. radiations: Electromagnetic radiations. Frequency 7.5x1014 to over 1015. Wavelength 400nm to below 290nm. Lies between x-ray and visible light. Divided into three bands, A, B and C band. A and B bands reach the earth, whereas C band is filtered by the ozone layer Produce physiological effect by non thermal mechanism

13 Most significant source of U.V. is the sun.
Obeys inverse square and cosine law. Intensity is proportional to the power of lamp output. Deepest penetration with high intensity, long wavelength and lower frequency. U.V.A penetrate farthest U.V.B and U.V.C are less deep. Less deep penetration if skin is thick or dark.

14 Physiological Effects of U.V.R
1- Erythema production: Redness. Depends on the amount of U.V. Types of erythema. High dose  destructive.

15 Delayed pigmentation of the skin
2- Tanning: Delayed pigmentation of the skin Caused by: Increase production and upward migration of melanin granules Oxidation of premelanin in the skin Protective response of the body

16 3- Epidermal hyperplasia
Thickening of the superficial layer of skin. 72 hours after exposure. Persists for several weeks. Protective mechanism. 4- Vitamin D Synthesis Conversion of provitamin D to vitamin D. 5- Other Effects Bactericidal effect.

17 Erythemal Respons Suberythemal dose (SED) :
No change in 24h after exposure. Minimal erythema dose (MED) : Smallest dose  erythema (8h) Dissapears within 24 hours

18 First-degree erythema (E1) :
Definite redness with mild desquamation. Appears within 6 hours. Lasts for 1 – 3 days About 2.5 times MED Second degree erythema (E2) Intense erythema with edema, peeling and pigmentation. Appears within 2 hours or less. Like severe sun burn. About 5 times MED.

19 Third degree erythema (E3) :
Erythema with severe blistering, peeling and exudation. Dose about 10 times MED

20 Clinical Indications for U.V. radiation
Skin disorder Psoriasis and other dermatological conditions Non pulmonary T.B. Healing wounds

21 Application Technique
Determine patient’s sensitivity to U.V radiation Use the same lamp Dose response assessment Graded according to individual’s erythemal response

22 The End  Good Luck To You All 

Download ppt "Infrared Radiation, Microwave, Ultraviolet Radiation."

Similar presentations

Ads by Google