Laser Hair Removal Using a 650-Microsecond Pulsed ND:YAG Laser: A Study of 298 Patients

Babar K. Rao, MD, Dermatology, New York, NY

Published in Global Dermatology Volume 1(1): 9-12

Unwanted hair causes significant stress in patients resulting in anxiety, depression and overall reduced quality of life [1]. Since their development in the 1960s, laser hair removal systems have continued to grow in popularity, as they are now one of the most common cosmetic procedures performed by dermatologists [2]. Unlike other hair removal techniques such as waxing, shaving, and electrolysis, laser hair removal is an efficient way to permanently reduce hair growth and has thus become the gold standard [3]. Laser, which stands for “light amplification stimulated emission of radiation” is a type of selective photothermolysis that targets light absorbing molecules or chromophores at a specific wavelength [4]. Melanin found in hair follicles is the chromophore that absorbs the energy emitted by laser and transforms it into heat that selectively damages hair follicles [5]. Today, there are a variety of laser hair removal systems used to target a variety of hair colors and skin types. Lasers utilizing shorter wavelengths such as the Ruby laser (694 nm) and Alexandrite laser (755 nm) have more superficial penetration into the epidermis and therefore have increased risk for epidermal melanin absorption and injury to the surrounding skin [6]. Subsequently, these lasers are typically avoided in patients with darker skin types (Fitzpatrick phototypes III-VI). Lasers with longer wavelengths, such as the Nd:YAG 1064 nm laser, provide deeper epidermal penetration to target follicular melanin with less absorption of surrounding skin. These lasers have been shown to be safe and effective for removal of hair in darker skin types [7].

In addition to selecting lasers with the appropriate wavelengths, determining the pulse duration and fluence (energy per square area) to optimize results and minimize side effects is also of utmost importance. High fluence and long pulse duration allows heat to diffuse to surrounding tissue and increases the risk for side effects such as scarring [8]. Pulse durations, in order to be effective should be shorter than or equal to the thermal relaxation time (TRT) of the hair shaft , which is estimated to be between 10 and 50 milliseconds [9]. As a result, most currently available laser hair removal systems use millisecond pulse widths.

Similarly, the majority of the studies that exist on Nd:YAG lasers exist on traditional long pulsed Nd:YAG lasers that deliver pulse widths of 3 to 30 milliseconds of fluence. These long pulsed Nd:YAG lasers are typically used with cooling systems to further reduce the incidence of epidermal damage. However, a 650 microsecond (μs) technique Nd:YAG laser has recently been found to have comparable results to longer pulse duration Nd:YAG lasers without skin cooling measures [10]. is study was conducted to evaluate the safety and patient satisfaction with laser hair removal using a novel portable and relatively inexpensive Nd:YAG laser with a short pulse of 650 μs.

Table of Contents

Hyperpigmentation

Photos Courtesy of Cheryl Burgess, MD.

Photos Courtesy of Jennifer Parker-Porter, MD.

Learn more about treating hyperpigmentation today.

Vascular Lesions

Photos Courtesy of Dr. Guilia Kasimova.

Photos Courtesy of Michael Gold, MD.

Learn more about treating vascular lesions today.

Rosacea / Redness

Photos Courtesy of Yelena Kipervas, DO.

Photos Courtesy of Dr. Nabil Fakih.

Learn more about treating rosacea and redness today.

Hair Removal

Photos Courtesy of Dr. Andrew Nnadi.

Photos Courtesy of Steik Spa.

Learn more about treating hair removal today.

PFB

Photos Courtesy of Dr. Michelle Henry.

Photos Courtesy of Wendy Roberts, MD.

Learn more about treating PFB today.

Scars

Photos Courtesy of Dr. William Watfa.

Photos Courtesy of Bradley Bloom, MD.

Learn more about treating scars today.

Autoimmune Disorders

Photos Courtesy of Dr. Passeron.

Photos Courtesy of Dr. Sakhiya.

Learn more about treating autoimmune disorders today.

Skin Rejuvenation

Photos Courtesy of Catie Cutler, LE.

Photos Courtesy of Chesahna Kindred, MD.

Learn more about skin rejuvenation today.

Acne

Photos Courtesy of Michael Gold, MD.

Photos Courtesy of Michael Gold, MD.

Learn more about treating acne today.

Staff Accountant / Junior Accountant

Aerolase Corporation, a leading aesthetic laser innovator, seeks a Staff Accountant / Junior Accountant. Having made the Inc. 5000 list as one of the world’s fastest growing private companies as well as annual best-in-class product awards, Aerolase has transformed the market with products that provide uniquely tolerable treatments to the patients and exceptionally high ROI for the practitioners. The company offers competitive and an exciting high-growth company culture.

Staff Accountant / Junior Accountant

• Provide support to the Controller and the management team
• Maintain day-to-day financial accounting functions, including A/P, A/R, expense tracking
• Support the month-end close process, ensuring accurate and timely monthly, quarterly, and year-end financial statements.
• Uploading annual budget and tracking actual to budget variances
• Use of financial reporting software
• Support external auditors and other required outside reporting requirements
• Participation in quarterly inventory reconciliations
• Assist team with projects such as policy creation, system implementation, client support etc.

• Some experience with and strong understanding of the monthly close process and technical accounting
• Detailed oriented, with ability to see the big picture
• Self-starter who can work independently and employ time management skills to meet deadlines.
• Knowledge of MS Excel (V-lookup, formulas, pivot tables).
• Strong interpersonal and communication skills
• Sound judgment and problem-solving skills

• Bachelor’s or master’s degree in Accounting a MUST, good understanding of GAAP
• 1-3 years’ experience in an accounting function (including internship)
• General Ledger/Operational Accounting experience
• Knowledge of Quickbooks or other reporting software a plus (more the better)
• Industry experience a plus

Senior Accountant

Aerolase Corporation, a leading aesthetic laser innovator, seeks a Senior Accountant. Having made the Inc. 5000 list as one of the world’s fastest growing private companies as well as annual best-in-class product awards, Aerolase has transformed the market with products that provide uniquely tolerable treatments to the patients and exceptionally high ROI for the practitioners. The company offers competitive and an exciting high-growth company culture.

Senior Accountant:

• Provide support to the Controller and the management team
• Own day-to-day financial accounting functions, including A/P, A/R, expense tracking
• Assist in establishing and maintaining policies & procedures in accordance with GAAP and Aerolase policy
• Key contributor to the month-end close process, ensuring accurate and timely monthly, quarterly, and year-end financial statements.
• Assist in the preparation of management reports – (cash management, various projections, month end reporting package)
• Involvement with the annual budget process
• Use of financial reporting software
• Support external auditors and other required outside reporting requirements
• Prepare and submit payroll
• Participation in quarterly inventory reconciliation to the perpetual
• Ad hoc projects

• Strong knowledge of the monthly close process and technical accounting

• Detailed oriented, with ability to see the big picture

• Experience in continuous improvement and accounting best practices

• Self-starter who can work independently and employ time management skills to meet deadlines.

• System savvy – ability to learn new financial software

• Intermediate knowledge of MS Excel (V-lookup, formulas, pivot tables).

• Global consolidations experience a plus

• Strong interpersonal and communication skills

• Sound judgment and problem-solving skills

• Bachelor’s or master’s degree in Accounting a MUST, good understanding of GAAP

• 3+ years’ experience working as a staff/senior accountant

• General Ledger/Operational Accounting experience a must

• Extensive knowledge of Quickbooks and other reporting software

• Prior involvement with system implementation

• Prior public accounting experience (any size firm) a plus

• Industry experience a plus

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