Laser Science (Parameters)

Treatment parameters for hair removal using long pulsed Nd YAG Laser

 

Colour of Skin

Fluence

Pulse width

Spot

 Fine Hair

 

 

 

Fair

30-40

10-20

6

Wheatish

25-35

10-20

6

Dark

20-30

10-20

6

 Coarse Hair

 

 

 

Fair

30-35

30-40

7-8

Wheatish

25-30

30-40

7-8

Dark

20-25

30-40

7-8

 

Treatment parameters for Vascular lesions using long pulsed Nd YAG Laser

 

Vessel size

Fluence

Pulse width

Spot

Large reticular veins (2-4mm)

130 -160

30-50

5-7

Small reticular veins (1-2 mm)  

130 - 170

20-40

3-5

Telangiectasia  - Spider vein  (≤ 1 mm)

160 - 180

10-15

2-3

 

Treatment parameters for Wart using long pulse Nd YAG laser

 

Administer a single laser shot in the center of the wart followed by laser shots around the circumference, ending with an additional single shot in the center of the wart. The patient should be followed up in 2-4 weeks as needed.

 

Fluence (j/cm2)

Pulse width (ms)

Spot size (mm)

120

15

4

 

Treatment parameters for different lesions using Erbium YAG Laser

 

Lesions

Energy

Pulse Width

Spot size

Pass/Session

S Keratosis

300-500

SP

2-3

3-10

Naevi

300-500

SP

2-3

3-5

Xanthelasma

500

SP

2-3

5-15

DPN

200-300

SP

2

2-3

 

Treatment parameters for different lesions using Co2 Laser

 

Lesions

Watt

Exposure Time

Super Pulse

Repeat Pulse

Off-Time

Verrucae

3-7

0.1 / con

on

on

0.1-1

Keratosis

3-5

0.01

on

on

0.1-0.5

Corn

3-5

0.05

x

on

0.02-0.03

Skin Tags

7-12

x

x

x

x

Naevi

3-5

0.01

on

on

0.02

Syringoma

5-7

0.01

on

on

0.02

 

Acne Scar reduction

 

Acne scar reduction can be obtained using Erbium YAG laser. The results can be better if we do subcission of bigger scars and do chemical peeling 3 or 4 times before the laser treatment. The procedure is done under local anaesthesia. First the shoulder of each scar is cut and then the whole area is treated. Finally feathering of the treated area is done. The procedure may be repeated after 6 months.
Oral isotretinoin is absolute contraindication for laser skin resurfacing. It damages the function of skin appendages – impair skin ability to reepithelisation

 

Treatment parameters for Acne scar reduction using Erbium YAG laser

 

Area

Energy

Pulse

Spot

Freqency

Pass

Session

Shoulder

500

SP

2

2

2-3

1

Whole

500

SP

3

3

2

2

Whole

500

SP

4

3

2

1

Feathering

300

SP

5

2

2

1