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Hair Counts (hair + count)

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Medical Sciences	100%

Selected Abstracts

Photoepilation Results of Axillary Hair in Dark-Skinned Patients by IPL: A Comparison Between Different Wavelength and Pulse Width

DERMATOLOGIC SURGERY, Issue 2 2006
JONG HEE LEE MD
BACKGROUND Recently, intense pulsed light (IPL) sources have been shown to provide long-term hair removal. OBJECTIVE This study examined the photoepilatory effects of different wavelengths and pulse width application in the same device and compared their efficiencies in Asian skin. METHODS Twenty-eight Korean women were treated using HR (600,950 nm filter) and 27 using HR-D (645,950 nm filter) in the axillar area. Four treatments were carried out at intervals of 4 to 6 weeks; follow-ups were conducted 8 months after the last treatment. Mean energy settings were 14.9±2.0 J/cm2 for HR and 17.1±0.6 J/cm2 for HR-D. Longer pulse widths were applied in case of HR-D treatment. Hair counts and photographic evaluation of skin sites were made at baseline and at the last follow-up. Final overall evaluations were performed by patients and clinicians. RESULTS Average clearances of 52.8% and 83.4% were achieved by HR and HR-D, respectively. No significant adverse effects were reported after HR-D treatment. One case each of hypopigmentation and hyperpigmentation was reported for HR. CONCLUSION An IPL source by removing 45 nm of the emitted spectra and applying longer pulse width was found to provide a safer and more effective means of photoepilation in Asian patients. [source]

Hair Removal Using a Long-Pulsed Nd:YAG Laser: Comparison at Fluences of 50, 80, and 100 J/cm2

DERMATOLOGIC SURGERY, Issue 5 2001
David J. Goldberg MD
Background. Unwanted hair is a widespread cosmetic problem. Many temporary methods of hair removal have proved unsatisfactory. A variety of laser systems with varying wavelengths, pulse durations, and energy fluences are currently utilized for hair removal. Optimal laser parameters continue to require further investigation. Objective. To evaluate the efficacy and safety of a long-pulse millisecond Nd:YAG hair removal laser utilizing fluences of either 50, 80, or 100 J/cm2. Methods. Fifteen subjects were treated with a contact cooled 50 msec Nd:YAG laser at fluences 30, 50, or 100 J/cm2. Reduction in hair regrowth was measured at 3 months after treatment by comparing the terminal hair count to the baseline values. Potential complications were also evaluated. Results. Average hair reduction at 3 months after treatment was 29%, 29%, and 27% in areas treated with a 50-msec Nd:YAG laser at fluences of 50, 80, and 100 J/cm2, respectively. Although short-term blistering was noted in two subjects, no hyperpimentation, hypopigmentation, or scarring was observed at 3 months after treatment. Conclusion. Long-pulse millisecond Nd:YAG laser hair removal with fluences of either 50, 80, or 100 J/cm2 leads to similar efficacy with no significant adverse effects. [source]

The lack of significant changes in scalp hair follicle density with advancing age

BRITISH JOURNAL OF DERMATOLOGY, Issue 4 2005
R. Sinclair
Summary Background, Age-related reduction in hair is seen in the axillary and pubic regions as well as the scalp; however, it has not been investigated qualitatively on the scalp. Horizontally sectioned scalp biopsy is an ideal tool to investigate the impact of advancing age on scalp hair follicle density and morphology. Objectives, To examine the effect of age and follicle miniaturization on total hair count in 1666 horizontally sectioned mid-scalp biopsies from 928 women aged between 13 and 84 years with hair loss. Methods Setting:, Specialist hair loss referral clinic in a teaching hospital. Design: Analysis of data set. Methods:, All scalp biopsies were 4 mm in diameter and taken from the crown. Miniaturization was assessed by calculating the ratio of terminal to vellus-like hairs (T/V) at the mid-isthmus level and considered significant if the ratio was , 4 : 1. Fibrosis was documented when present. Linear regression was used to examine the association between total hair count, age and miniaturization. Results, The average number of hair follicles per biopsy was 39·6 (SD ± 10·8). A highly significant negative association (P < 0·0001) was found between age and total follicle number, although the predictive value of age in total hair count was found to be small [root error mean square (R2) < 2%]. Controlling for T/V , 4 : 1, the association was weakened, but remained significant. The relationship unconfounded by T/V , 4 : 1 shows that for every additional year of ageing, 0·077 total hair follicles (0·22%) are lost per biopsy. Conclusions, Age and follicular miniaturization were found to be extremely weak predictors of total hair count in women with hair loss. [source]

Effects of Finasteride (1 mg) on Hair Transplant

DERMATOLOGIC SURGERY, Issue 10 2005
Matt Leavitt DO
Background. The improved scalp coverage achieved by hair transplant for men with androgenetic alopecia can be diminished by continued miniaturization and loss of preexisting, nontransplanted hairs. Objectives. To evaluate whether finasteride 1 mg, administered daily from 4 weeks before until 48 weeks after hair transplant, improves scalp hair and growth of nontransplanted hair in areas surrounding the transplant and to evaluate the safety and tolerability of finasteride for men undergoing hair transplant. Methods. In this randomized, double-blind, placebo-controlled study, 79 men with androgenetic alopecia (20,45 years of age) were assigned to treatment with finasteride 1 mg (n = 40) or placebo (n = 39) once daily from 4 weeks before until 48 weeks after hair transplant. Efficacy was evaluated by review of global photographs by an expert dermatologist and by macrophotography for scalp hair counts. Results. Treatment with finasteride resulted in significant improvements from baseline, compared with placebo, in scalp hair based on global photographic assessment (p < .01) and hair counts (p < .01) at week 48. Visible increases in superior/frontal scalp hair post-transplant were recorded for 94% and 67% of patients in the finasteride and placebo groups, respectively. Finasteride treatment was generally well tolerated. Conclusion. For men with androgenetic alopecia, therapy with finasteride 1 mg daily from 4 weeks before until 48 weeks after hair transplant improves scalp hair surrounding the hair transplant and increases hair density. [source]

Comparison of Long-Pulsed Diode and Long-Pulsed Alexandrite Lasers for Hair Removal: A Long-Term Clinical and Histologic Study

DERMATOLOGIC SURGERY, Issue 7 2001
Christiane Handrick MD
Background. Unwanted facial and body hair is a common problem, generating a high level of interest for treatment innovations. Advances in laser technology over the past several years has led to the development and distribution of numerous red and infrared lasers and light sources to address this issue. Despite the impressive clinical results that have been reported with the use of individual laser hair removal systems, long-term comparative studies have been scarce. Objective. To compare the clinical and histologic efficacy, side effect profile, and long-term hair reduction of long-pulsed diode and long-pulsed alexandrite laser systems. Methods. Twenty women with Fitzpatrick skin types I,IV and dark terminal hair underwent three monthly laser-assisted hair removal sessions with a long-pulsed alexandrite laser (755 nm, 2-msec pulse, 10 mm spot) and a long-pulsed diode laser (800 nm, 12.5 msec or 25 msec, 9 mm spot). Axillary areas were randomly assigned to receive treatment using each laser system at either 25 J/cm2 or 40 J/cm2. Follow-up manual hair counts and photographs of each area were obtained at each of the three treatment visits and at 1, 3, and 6 months after the final laser session. Histologic specimens were obtained at baseline, immediately after the initial laser treatment, and 1 and 6 months after the third treatment session. Results. After each laser treatment, hair counts were successively reduced and few patients found it necessary to shave the sparsely regrown hair. Optimal clinical response was achieved 1 month after the second laser treatment, regardless of the laser system or fluence used. Six months after the third and final treatment, prolonged clinical hair reduction was observed with no significant differences between the laser systems and fluences used. Histologic tissue changes supported the clinical responses observed with evidence of initial follicular injury followed by slow follicular regeneration. Side effects, including treatment pain and vesiculation, were rare after treatment with either laser system, but were observed more frequently with the long-pulsed diode system at the higher fluence of 40 J/cm2. Conclusion. Equivalent clinical and histologic responses were observed using a long-pulsed alexandrite and a long-pulsed diode laser for hair removal with minimal adverse sequelae. While long-term hair reduction can be obtained in most patients after a series of laser treatments, partial hair regrowth is typical within 6 months, suggesting the need for additional treatments to improve the rate of permanent hair removal. [source]

Long-term fine caliber hair removal with an electro-optic Q-switched Nd:YAG Laser,

LASERS IN SURGERY AND MEDICINE, Issue 8 2010
Abnoeal D. Bakus PhD
Abstract Background In spite of major advances in hair removal therapy, fine caliber hair remains a significant challenge for laser- and light-based devices. Objective Evaluate a novel Electro-Optic (EO) Q-switched Nd:YAG laser for pigmented fine caliber hair removal in the Standard Single and a double pulse (DP) mode. Methods Eleven patients underwent four laser treatments at monthly intervals. Bilateral anatomical regions received to one side the standard single pulse (SSP) while the other side the DP option. Blinded investigators conducted hair counts at 6 months post-treatment and after 24 months. Patients assessed hair loss and discomfort. Six patients rated their satisfaction at 6 months. Results At 6 months, investigators found a reduction of 50% in hair counts with the DP and 46% with standard pulse. Ninety percent in DP and 50% in SSP reported none to mild discomfort. Transient erythema and edema was observed with a lower severity rating with the DP. There were no other untoward effects. 83.3% of patients who completed the study at 6 months expressed satisfaction with the results. At 24 months hair loss was maintained at the same rate. Conclusion The EO Q-switched Nd:YAG laser is an effective option for the permanent treatment of unwanted fine hair and has a high-patient satisfaction rate. There is less therapeutic discomfort in the DP mode. Lasers Surg. Med. 42:706,711, 2010 © 2010 Wiley-Liss, Inc. [source]