Calculating Laser Treatment Parameters

Power

Power and energy are closely related. Power is the rate at which energy is delivered, not an amount of energy itself.

Formula:

Power = Energy / Time     1 Watt = 1 Joule / Second

Terapeutic Energy = Power (Watts) or Joules/sec x Time (sec)

Power Density

Power density or Irradiance refers to the amount of power delivered per unit area.

Power density indicates the degree of concentration of the laser output

It is expressed in Watts per square centimeter (W/cm2),or miliWatts per square centimeter (mW/cm2)

Some studies have concluded that the power density may be of even greater signifcance than the dose.

Example:  A laser’s output is 4 Watts, and it is illuminating a circle of 3 centimeter diameter

                First fnd the area of the circle, 3.14 x 1.5 x 1.5 = 7 cm2

                Then divide the power by the area, 4W / 7cm2 = 0.6 W/cm2

Formula: Irradiance (PD) =W/cm2

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donna@gigaalaser.com

Laser Physical Therapy Treatment Protocol Guidelines

Introduction

The guidelines listed here are very general guidelines. Many factors afect the selection of the appropriate dosage and treatment frequency for each condition and patient. 

Te healthcare practitioner must take into account the body mass of the patient, their age and general health, the depth of the injury, the tissue type, skin color, etc. 

Approaches to Treatment

1.Treat the site of the injury and / or pain

2. Treat using an Anatomical perspective

3. Treat using an Acupuncture perspective

Additional Treatment Approaches

1. Treat the pathway of the involved nerves

2. Treat the involved spinal level; ofen the Cervical spine area from C1 to C4 

3. Treat the auricular point(s) related to the condition.

General Treatment Guidelines

Follow all Safety guidelinesT

reatment must be administered directly to exposed skin.  

IMPORTANT: Do not treat through clothing or bandages (the treatment will not be efective)

Patient feedback is important to avoid any discomfort or pain.  Patients may report a number of sensations, such as localized feelings of “soothing warmth”, tingling, or an increase or decrease in symptoms during the laser therapy treatment or within a 24 hour period immediately following the treatment.

Ask the patient to immediately report any discomfort or pain (“feels too warm or hot”) during the laser therapy treatment.

Treatment Method Two OptionsOption

One:  NON – CONTACT METHOD: the Handpiece or Probe is held ½” away from the skin Option

Two:  CONTACT METHOD: the Handpiece or Probe is held directly on the skin

Position of the Handpiece or Probe

Position the handpiece perpendicular to the skin

Do not angle the handpiece to the skin, but follow the contour of the body and skin treatment area

EVLA treatment picture

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Ultrasound  image showing  the catheter and  the  laser fber inserted in the Saphenous vein




Duplex ultrasound  is performed  in  the upright posi-tion  to map  incompetent  sources of venous  refux and  then  to mark  the  skin  overlying the  incompetent  portion  of  the  great saphenous vein starting at the saphenofemoral junction




Duplex  control  is  used  to  guide  injection  of  7-  to 8-mL  aliquots of  the  following  solution: 10 mL  lidocaine 1% with epinephrine and 10 mL lidocaine 1% without epinephrine and additional 60 mL physiologic serum



To reduce the amount of blood inside the vein, patients are placed in a 15–20° head-down position (Trendelenburg position)



During  laser  irradiation,  the withdrawal of  the  laser fber is controlled to apply a constant linear endovenous energy density (in this case, a metric ruler)



At  the end of  the surgical procedure, venous com-pression  was  applied  for  24  h  by  irremovable  compression bandage

Radial fiber

Length: 3m 

Sterile packaging (ETO) 

NA 0.37 600μm

SMA 905 connector

Application: EVLA

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EVLA Mechanism of Action

EVLA  works  by  means  of  thermal  destruction  of venous tissues. Laser energy is delivered to the desired incompetent  segment  inside  the

vein  through  a  bare laser fber that has been passed through a sheath to thedesired location.

Several wavelengths have been proposed: 810, 940, 980, 1,064, and 1,320 nm, with 810, 940,  and  980  being  the most commonly  used. More recently,  use  of  a  1,470-  to  1,500-nm  diode  laser  has been  proposed. Wavelengths  of  1,470–1,500  nm  are preferentially absorbed by water.

When using laser light, heat is generated within the zone  of  optical  penetration  by  direct  absorption  of laser  energy.  Absorption  is  the

primary  event  that allows a  laser or other  light source  to cause a poten-tially  therapeutic  (or  damaging)  effect  on  a  tissue. Without absorption,  there  is no energy  transfer  to  the tissue  and  the  tissue  is  left  unaffected  by  the  light. Scattering  of  light  occurs  in  all  

biological  tissues: blood, vessel walls, and perivenous tissue. Due to fuc-tuations  in  the  refractive  index  of  these  media,  the propagation of light into the tissue is modifed and the scattering  affects  “where”  the  absorption will  occur, usually reducing the penetration of light into the tissue. 

Heating decreases with tissue depth as absorption and scattering  attenuate  the  incident  beam. Based  on  the absorption and effective scattering coeffcients of  the biological  tissue,  the  optical  extinction  (µeff)  can  be determined.

1064nm nail fungua laser treatment

Gigaa Laser is one of the leading manufacturer of medical diode laser system in China.

The 1064nm diode laser provide ideal solution for nail fungus treatment.

Treatment video link: https://www.youtube.com/watch?v=NjbfwCQ0XzA&feature=youtu.be

Welcome to contat donna@gigaalaser.com to get more info