The Experts below are selected from a list of 360 Experts worldwide ranked by ideXlab platform
Tina S Alster - One of the best experts on this subject based on the ideXlab platform.
-
long pulsed 1064 nm nd yag laser assisted Hair Removal in all skin types
Dermatologic Surgery, 2004Co-Authors: Elizabeth L Tanzi, Tina S AlsterAbstract:BACKGROUND. Although there are several different laser systems available for the reduction of unwanted Hair, no single system has been shown to be superior in providing safe and effective Hair Removal in every skin type. The purpose of this study was to evaluate the safety and efficacy of a high-energy, long-pulsed, 1064-nm Nd:YAG laser with a contact cooling device for Hair Removal in skin phototypes I‐VI. METHODS. Thirty-six adult patients (skin phototypes I‐VI) with dark terminal facial or nonfacial Hair were treated with a longpulsed Nd:YAG laser (1064nm, 10-mm spot size, fluence of 30 to 60J/cm 2 ). The selected pulse duration was dependent on the skin type of the patient: Skin types I/II, III/IV, and V/VI received 10, 20, and 30 ms, respectively. Three consecutive laser treatments were delivered to 36 skin sites at 4- to 6-week intervals. Hair counts and photographic evaluations of skin sites were obtained at baseline, immediately before each treatment session, and at 1, 3, and 6 months after the final laser treatment. RESULTS. Peak Hair reduction was observed 1 month after the series of laser treatments with a mean Hair reduction ranging from 58% to 62% on facial sites and 66% to 69% on nonfacial sites. At 6 months after a series of three long-pulsed Nd:YAG laser treatments, a mean Hair reduction of 41% to 46% on the face and 48% to 53% on the body was found depending on the skin phototype. Adverse reactions included mild to moderate treatment pain, short-term erythema, and rare occurrences of transient pigmentary alteration without scarring. CONCLUSION. The long-pulsed 1064-nm Nd:YAG laser with contact cooling is a safe and effective method of Hair reduction in patients of all skin types. Side effects were limited and transient.
-
comparison of long pulsed diode and long pulsed alexandrite lasers for Hair Removal a long term clinical and histologic study
Dermatologic Surgery, 2001Co-Authors: Christiane Handrick, Tina S AlsterAbstract: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/cm 2 or 40 J/cm 2 . 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/cm 2 . 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.
-
laser assisted Hair Removal side effects of q switched nd yag long pulsed ruby and alexandrite lasers
Journal of The American Academy of Dermatology, 1999Co-Authors: Christopher A. Nanni, Tina S AlsterAbstract:Abstract Background: Laser-assisted Hair Removal has become popularized using wavelengths in both the red and infrared regions of the electromagnetic spectrum. These photoepilation devices target follicular melanin or an exogenous pigment placed within the follicle resulting in thermal damage to the Hair follicle and shaft. However, melanocytes and keratinocytes located within the superficial layers of the skin also absorb red and infrared laser radiation. This may result in unwanted epidermal injury during the Hair Removal process. Objective: The purpose of this study was to examine a large patient population to determine the frequency of side effects using 3 different Hair Removal laser systems with various wavelengths, pulse durations, and treatment protocols. Methods: A retrospective chart review and digital photographic analysis of the side effects resulting from 900 consecutive laser-assisted Hair Removal treatments delivered over a 24-month study period, by means of either a Q-switched Nd:YAG laser with pretreatment wax-epilation and topical carbon solution, a long-pulse ruby laser with a contact cooling tip, or a long-pulse alexandrite laser are reported. Results: Treatment pain, erythema, edema, hypopigmentation and hyperpigmentation, blistering, crusting, erosions, purpura, and folliculitis were observed. The majority of undesirable tissue effects occurred on tanned skin or in Fitzpatrick skin phototypes III and higher. The ruby and alexandrite laser systems resulted in the majority of side effects seen. The effects of seasonal variations, anatomic treatment location, and sun exposure were striking within the ruby and alexandrite laser groups. No infections, scarring, or long-term complications occurred. Conclusion: Laser-assisted Hair Removal is a safe procedure when patient characteristics such as skin type, anatomic location, and sun-exposed or tanned skin are considered during selection of laser treatment parameters. Lasers emitting wavelengths with high melanin absorption capabilities should be used in a conservative manner when treating patients with dark skin phototypes or suntans. No long-term complications, infections, or scarring occurred in this study population. (J Am Acad Dermatol 1999;41:165-71.)
-
long pulsed alexandrite laser assisted Hair Removal at 5 10 and 20 millisecond pulse durations
Lasers in Surgery and Medicine, 1999Co-Authors: Christopher A. Nanni, Tina S AlsterAbstract:Background Several laser systems with varying wavelengths, pulse durations, and energy fluences are currently utilized for Hair Removal. However, the ideal laser parameters and treatment candidates for photoepilation remain largely unknown. The medical literature lacks a wealth of experimental data to sufficiently document the long-term safety and efficacy of laser-assisted Hair Removal. This study examines the clinical efficacy and side effect profile of long-pulsed alexandrite laser-assisted Hair Removal utilizing laser pulse durations of either 5, 10, or 20 milliseconds (ms). Study Design/Methods Laser-assisted Hair Removal was performed on 36 subjects with a long-pulsed alexandrite laser. Areas of unwanted Hair growth on the face, back, and legs were divided linearly into four 1 cm2 or 2 cm2 quadrants. Experimental regions included a control quadrant and three additional quadrants, which were treated with the alexandrite laser using an average fluence of 18 J/cm2, with a 10 mm spot size at either a 5, 10, or 20 ms pulse duration. Hair counts and photographs were obtained before treatment, immediately following irradiation, 1 week and 1, 3, and 6 months postoperatively. Results All laser-treated quadrants displayed a significant delay in Hair regrowth compared to control nontreated quadrants at postoperative week 1 and months 1 and 3. Hair counts were reduced by 66% at 1 month, 27% at 3 months, and 4% at 6 months. No significant differences in clinical efficacy or side effect profiles were observed between treatment quadrants, yet a trend towards less post-treatment erythema and hyperpigmentation was noted with the 20 ms pulse duration. Conclusions Equivalent long-term Hair Removal for up to 6 months was achieved with the long-pulsed alexandrite laser at 5, 10, and 20 ms pulse durations at an average fluence of 18 J/cm2. Side effects were limited and transient. Lasers Surg. Med. 24:332–337, 1999. © 1999 Wiley-Liss, Inc.
-
a practical review of laser assisted Hair Removal using the q switched nd yag long pulsed ruby and long pulsed alexandrite lasers
Dermatologic Surgery, 1998Co-Authors: Christopher A. Nanni, Tina S AlsterAbstract:BACKGROUND. The recent development of numerous laser-assisted Hair Removal techniques has produced confusion in the field of cutaneous laser surgery. OBJECTIVES. A systematic review of the Hair Removal laser systems currently available is attempted. Appropriate patient selection, treatment protocols, and discussion of each system's advantages, disadvantages, and complications is provided. CONCLUSIONS. Techniques involving the use of selective Q-switched Nd:YAG and long-pulsed alexandrite and ruby laser systems provide a significant delay in Hair growth. With further technologic advances and understanding of proper treatment parameters and intervals, it is expected that permanent Hair Removal may eventually be possible. © 1998 by the American Society for Dermatologic Surgery, Inc. Dermatol Surg 1998;24: 1399-1405.
E. J. B. Furnee - One of the best experts on this subject based on the ideXlab platform.
-
The effect of Hair Removal after surgery for sacrococcygeal pilonidal sinus disease: a systematic review of the literature
Techniques in Coloproctology, 2018Co-Authors: A. A. Pronk, L. Eppink, N. Smakman, E. J. B. FurneeAbstract:Background It has been suggested that Removal of body Hair in the sacrococcygeal area prevents recurrence after surgery for sacrococcygeal pilonidal sinus disease (SPSD). The aim of this study was to review the literature regarding the effect of Hair depilation on the recurrence rate in patients surgically treated for SPSD. Methods A systematic search was performed in PubMed, EMBASE, and The Cochrane Library by using synonyms for SPSD. Title, abstract, and full text were screened by two independent reviewers. Data were systematically collected from all included studies by using a standardized data extraction form. Results The search and selection yielded 14 studies, involving 963 patients. The study design of the included studies was: retrospective cohort ( n = 7), prospective cohort ( n = 3), randomized controlled trial ( n = 2), and case–control ( n = 2).The mean length of follow-up was 37.0 (standard error of the mean: 35.0) months. The recurrence rate was 9.3% (34 out of 366 patients) in patients who had laser Hair Removal, 23.4% (36 out of 154 patients) in those who had razor shaving/cream depilation, and 19.7% (85 out of 431 patients) in those who had no Hair Removal after surgery for SPSD. Conclusions This systematic review showed a lower recurrence rate after laser Hair Removal compared to no Hair Removal and razor/cream depilation. Due to the small sample size and limited methodological quality of the included studies, a high-quality randomized controlled trial is required.
-
the effect of Hair Removal after surgery for sacrococcygeal pilonidal sinus disease a systematic review of the literature
Techniques in Coloproctology, 2018Co-Authors: A. A. Pronk, L. Eppink, N. Smakman, E. J. B. FurneeAbstract:It has been suggested that Removal of body Hair in the sacrococcygeal area prevents recurrence after surgery for sacrococcygeal pilonidal sinus disease (SPSD). The aim of this study was to review the literature regarding the effect of Hair depilation on the recurrence rate in patients surgically treated for SPSD. A systematic search was performed in PubMed, EMBASE, and The Cochrane Library by using synonyms for SPSD. Title, abstract, and full text were screened by two independent reviewers. Data were systematically collected from all included studies by using a standardized data extraction form. The search and selection yielded 14 studies, involving 963 patients. The study design of the included studies was: retrospective cohort (n = 7), prospective cohort (n = 3), randomized controlled trial (n = 2), and case–control (n = 2).The mean length of follow-up was 37.0 (standard error of the mean: 35.0) months. The recurrence rate was 9.3% (34 out of 366 patients) in patients who had laser Hair Removal, 23.4% (36 out of 154 patients) in those who had razor shaving/cream depilation, and 19.7% (85 out of 431 patients) in those who had no Hair Removal after surgery for SPSD. This systematic review showed a lower recurrence rate after laser Hair Removal compared to no Hair Removal and razor/cream depilation. Due to the small sample size and limited methodological quality of the included studies, a high-quality randomized controlled trial is required.
Christopher A. Nanni - One of the best experts on this subject based on the ideXlab platform.
-
laser assisted Hair Removal side effects of q switched nd yag long pulsed ruby and alexandrite lasers
Journal of The American Academy of Dermatology, 1999Co-Authors: Christopher A. Nanni, Tina S AlsterAbstract:Abstract Background: Laser-assisted Hair Removal has become popularized using wavelengths in both the red and infrared regions of the electromagnetic spectrum. These photoepilation devices target follicular melanin or an exogenous pigment placed within the follicle resulting in thermal damage to the Hair follicle and shaft. However, melanocytes and keratinocytes located within the superficial layers of the skin also absorb red and infrared laser radiation. This may result in unwanted epidermal injury during the Hair Removal process. Objective: The purpose of this study was to examine a large patient population to determine the frequency of side effects using 3 different Hair Removal laser systems with various wavelengths, pulse durations, and treatment protocols. Methods: A retrospective chart review and digital photographic analysis of the side effects resulting from 900 consecutive laser-assisted Hair Removal treatments delivered over a 24-month study period, by means of either a Q-switched Nd:YAG laser with pretreatment wax-epilation and topical carbon solution, a long-pulse ruby laser with a contact cooling tip, or a long-pulse alexandrite laser are reported. Results: Treatment pain, erythema, edema, hypopigmentation and hyperpigmentation, blistering, crusting, erosions, purpura, and folliculitis were observed. The majority of undesirable tissue effects occurred on tanned skin or in Fitzpatrick skin phototypes III and higher. The ruby and alexandrite laser systems resulted in the majority of side effects seen. The effects of seasonal variations, anatomic treatment location, and sun exposure were striking within the ruby and alexandrite laser groups. No infections, scarring, or long-term complications occurred. Conclusion: Laser-assisted Hair Removal is a safe procedure when patient characteristics such as skin type, anatomic location, and sun-exposed or tanned skin are considered during selection of laser treatment parameters. Lasers emitting wavelengths with high melanin absorption capabilities should be used in a conservative manner when treating patients with dark skin phototypes or suntans. No long-term complications, infections, or scarring occurred in this study population. (J Am Acad Dermatol 1999;41:165-71.)
-
long pulsed alexandrite laser assisted Hair Removal at 5 10 and 20 millisecond pulse durations
Lasers in Surgery and Medicine, 1999Co-Authors: Christopher A. Nanni, Tina S AlsterAbstract:Background Several laser systems with varying wavelengths, pulse durations, and energy fluences are currently utilized for Hair Removal. However, the ideal laser parameters and treatment candidates for photoepilation remain largely unknown. The medical literature lacks a wealth of experimental data to sufficiently document the long-term safety and efficacy of laser-assisted Hair Removal. This study examines the clinical efficacy and side effect profile of long-pulsed alexandrite laser-assisted Hair Removal utilizing laser pulse durations of either 5, 10, or 20 milliseconds (ms). Study Design/Methods Laser-assisted Hair Removal was performed on 36 subjects with a long-pulsed alexandrite laser. Areas of unwanted Hair growth on the face, back, and legs were divided linearly into four 1 cm2 or 2 cm2 quadrants. Experimental regions included a control quadrant and three additional quadrants, which were treated with the alexandrite laser using an average fluence of 18 J/cm2, with a 10 mm spot size at either a 5, 10, or 20 ms pulse duration. Hair counts and photographs were obtained before treatment, immediately following irradiation, 1 week and 1, 3, and 6 months postoperatively. Results All laser-treated quadrants displayed a significant delay in Hair regrowth compared to control nontreated quadrants at postoperative week 1 and months 1 and 3. Hair counts were reduced by 66% at 1 month, 27% at 3 months, and 4% at 6 months. No significant differences in clinical efficacy or side effect profiles were observed between treatment quadrants, yet a trend towards less post-treatment erythema and hyperpigmentation was noted with the 20 ms pulse duration. Conclusions Equivalent long-term Hair Removal for up to 6 months was achieved with the long-pulsed alexandrite laser at 5, 10, and 20 ms pulse durations at an average fluence of 18 J/cm2. Side effects were limited and transient. Lasers Surg. Med. 24:332–337, 1999. © 1999 Wiley-Liss, Inc.
-
a practical review of laser assisted Hair Removal using the q switched nd yag long pulsed ruby and long pulsed alexandrite lasers
Dermatologic Surgery, 1998Co-Authors: Christopher A. Nanni, Tina S AlsterAbstract:BACKGROUND. The recent development of numerous laser-assisted Hair Removal techniques has produced confusion in the field of cutaneous laser surgery. OBJECTIVES. A systematic review of the Hair Removal laser systems currently available is attempted. Appropriate patient selection, treatment protocols, and discussion of each system's advantages, disadvantages, and complications is provided. CONCLUSIONS. Techniques involving the use of selective Q-switched Nd:YAG and long-pulsed alexandrite and ruby laser systems provide a significant delay in Hair growth. With further technologic advances and understanding of proper treatment parameters and intervals, it is expected that permanent Hair Removal may eventually be possible. © 1998 by the American Society for Dermatologic Surgery, Inc. Dermatol Surg 1998;24: 1399-1405.
-
optimizing treatment parameters for Hair Removal using a topical carbon based solution and 1064 nm q switched neodymium yag laser energy
Archives of Dermatology, 1997Co-Authors: Christopher A. Nanni, Tina S AlsterAbstract:Objective: To determine the most effective treatment parameters for laser-assisted Hair Removal using a Q-switched neodymium:yttrium-aluminum-garnet (Nd: YAG) laser. Design: Prospective study to determine the effectiveness of Q-switched Nd:YAG laser—assisted Hair Removal under varying pretreatment protocols. Hair growth was assessed after laser treatment, and the results were compared with those of wax epilation at 4, 12, and 24 weeks. Setting: A private ambulatory laser facility and academic referral center. Intervention: Laser-assisted Hair Removal was performed under 4 different pretreatment conditions. Eighteen areas of unwanted body and facial Hair from 12 study subjects were divided into 4 quadrants. Wax epilation followed by application of a carbon-based solution and exposure to Q-switched Nd:YAG laser radiation was performed on 1 quadrant. A second quadrant was wax epilated and exposed to Q-switched Nd:YAG laser radiation without prior carbon solution application. A third quadrant was exposed to laser radiation alone, and a final quadrant was wax epilated to serve as the control. Follow-up evaluations at 1, 3, and 6 months consisted of photographic documentation, manual Hair counts, and patient Hair-density estimates. Main Outcome Measure: Percentage of Hair regrowth as assessed by objective Hair counts and patient subjective evaluations. Results: Mean percentage of Hair regrowth at 1 month was 39.9% for the wax-carbon-laser quadrant, 46.7% for the wax-laser quadrant, 66.1% for the laser-alone quadrant, and 77.9% for the wax control quadrant. The percentage of Hair regrowth approximately doubled by 3 months but was significantly delayed in all laser-treated quadrants regardless of pretreatment protocol. Full Hair regrowth in all anatomic locations was observed by month 6. Patient subjective evaluations of Hair density closely approximated Hair count data. No adverse effects or long-term complications were observed. Conclusions: A single Hair-Removal treatment with the Q-switched Nd:YAG laser is safe and effective in delaying Hair growth for up to 3 months. Although the combination of pretreatment wax epilation and topical carbon solution application was effective, laser irradiation alone, with or without wax epilation, also provided a significant delay in Hair growth. Arch Dermatol. 1997;133:1546-1549
A. A. Pronk - One of the best experts on this subject based on the ideXlab platform.
-
The effect of Hair Removal after surgery for sacrococcygeal pilonidal sinus disease: a systematic review of the literature
Techniques in Coloproctology, 2018Co-Authors: A. A. Pronk, L. Eppink, N. Smakman, E. J. B. FurneeAbstract:Background It has been suggested that Removal of body Hair in the sacrococcygeal area prevents recurrence after surgery for sacrococcygeal pilonidal sinus disease (SPSD). The aim of this study was to review the literature regarding the effect of Hair depilation on the recurrence rate in patients surgically treated for SPSD. Methods A systematic search was performed in PubMed, EMBASE, and The Cochrane Library by using synonyms for SPSD. Title, abstract, and full text were screened by two independent reviewers. Data were systematically collected from all included studies by using a standardized data extraction form. Results The search and selection yielded 14 studies, involving 963 patients. The study design of the included studies was: retrospective cohort ( n = 7), prospective cohort ( n = 3), randomized controlled trial ( n = 2), and case–control ( n = 2).The mean length of follow-up was 37.0 (standard error of the mean: 35.0) months. The recurrence rate was 9.3% (34 out of 366 patients) in patients who had laser Hair Removal, 23.4% (36 out of 154 patients) in those who had razor shaving/cream depilation, and 19.7% (85 out of 431 patients) in those who had no Hair Removal after surgery for SPSD. Conclusions This systematic review showed a lower recurrence rate after laser Hair Removal compared to no Hair Removal and razor/cream depilation. Due to the small sample size and limited methodological quality of the included studies, a high-quality randomized controlled trial is required.
-
the effect of Hair Removal after surgery for sacrococcygeal pilonidal sinus disease a systematic review of the literature
Techniques in Coloproctology, 2018Co-Authors: A. A. Pronk, L. Eppink, N. Smakman, E. J. B. FurneeAbstract:It has been suggested that Removal of body Hair in the sacrococcygeal area prevents recurrence after surgery for sacrococcygeal pilonidal sinus disease (SPSD). The aim of this study was to review the literature regarding the effect of Hair depilation on the recurrence rate in patients surgically treated for SPSD. A systematic search was performed in PubMed, EMBASE, and The Cochrane Library by using synonyms for SPSD. Title, abstract, and full text were screened by two independent reviewers. Data were systematically collected from all included studies by using a standardized data extraction form. The search and selection yielded 14 studies, involving 963 patients. The study design of the included studies was: retrospective cohort (n = 7), prospective cohort (n = 3), randomized controlled trial (n = 2), and case–control (n = 2).The mean length of follow-up was 37.0 (standard error of the mean: 35.0) months. The recurrence rate was 9.3% (34 out of 366 patients) in patients who had laser Hair Removal, 23.4% (36 out of 154 patients) in those who had razor shaving/cream depilation, and 19.7% (85 out of 431 patients) in those who had no Hair Removal after surgery for SPSD. This systematic review showed a lower recurrence rate after laser Hair Removal compared to no Hair Removal and razor/cream depilation. Due to the small sample size and limited methodological quality of the included studies, a high-quality randomized controlled trial is required.
R. Rox Anderson - One of the best experts on this subject based on the ideXlab platform.
-
Hair Removal with an 800-nm pulsed diode laser
Journal of the American Academy of Dermatology, 2000Co-Authors: Valeria B Campos, Christine C. Dierickx, William A. Farinelli, Woraphong Manuskiatti, Taiyuan D Lin, R. Rox AndersonAbstract:Abstract Background and Objective: Laser Hair Removal is a relatively new procedure. Our purpose was to study the efficacy and safety of a high-power, pulsed diode laser array for removing unwanted Hair. Methods: A total of 38 subjects were treated with a prototype of the 800-nm diode laser system. Fluences ranging from 10 to 40 J/cm 2 (mean, 33.4 J/cm 2 ) were used and 1 to 4 treatments (mean, 2.7) were performed. Evaluation of Hair loss was performed at least 4 months after the last treatment (mean, 8.7 months) by a blinded assessment of clinical photographs. Results: A total of 59% of the subjects had only sparse Hair regrowth at the final follow-up. Higher fluences and multiple treatments produced greater long-term efficacy. Transient pigmentary changes occurred in 29% of the subjects and were more common in darker skin types IV to VI ( P = .047). Conclusion: The 800-nm diode laser is an efficient and safe technique for Hair reduction. Adverse pigmentary effects occur, but are transient. (J Am Acad Dermatol 2000;43:442–7.)
-
ruby laser Hair Removal evaluation of long term efficacy and side effects
Lasers in Surgery and Medicine, 2000Co-Authors: Valeria B Campos, Christine C. Dierickx, William A. Farinelli, Woraphong Manuskiatti, Taiyuan D Lin, R. Rox AndersonAbstract:Background and Objective: Although several studies on laser-assisted Hair Removal have been published, data on long-term follow-up are few. The present study investigated the long-term efficacy and safety of normal-mode ruby laser pulses on Hair Removal. Study Design/Materials and Methods: The normal-mode ruby laser (Epilaser; 694 nm, 3 msec) was used to treat a wide range of body sites in 51 volunteers. The mean follow-up after the last treatment was 8.37 months. Results: Sixty-three percent of the patients had sparse regrowth. The mean fluence used was 46.5 J/cm 2 in patients who had sparse Hair regrowth and 39.3 J/cm 2 in patients who had moderate Hair regrowth (P = 0.0127). Transient pigmentary changes occurred most frequently in patients with skin type 4. Conclusion: The normal-mode ruby laser is an efficient and safe method for long-term Hair reduction, especially in fair-skinned individuals with dark Hair. Higher fluences produce greater long-term efficacy. Adverse effects are minimal and transient. Lasers Surg. Med. 26:177‐ 185, 2000. © 2000 Wiley-Liss, Inc.
-
Permanent Hair Removal by Normal-Mode Ruby Laser
Archives of dermatology, 1998Co-Authors: Christine C. Dierickx, Melanie Grossman, William A. Farinelli, R. Rox AndersonAbstract:Objective To assess the permanence of Hair Removal by normal-mode ruby laser treatment. Methods Hair Removal was measured for 2 years after a single treatment with normal-mode ruby laser pulses (694 nm, 270 microseconds, 6-mm beam diameter). Observations Six test areas on the thighs or backs of 13 volunteers were exposed to normal-mode ruby laser pulses at fluences of 30 to 60 J/cm 2 delivered to both shaved and wax-epilated skin. In addition, there was a shaved and wax-epilated control site. Terminal Hairs were manually counted before and after laser exposure. Transient alopecia occurred in all 13 participants after laser exposure, consistent with induction of telogen. Two years after laser exposure, 4 participants still had obvious, significant Hair loss at all laser-treated sites compared with the unexposed shaved and wax-epilated control sites. In all 4 participants, there was no significant change in Hair counts 6 months, 1 year, and 2 years after laser exposure. Laser-induced alopecia correlated histologically with miniaturized, velluslike Hair follicles. No scarring and no permanent pigmentary changes were observed. Conclusions Permanent, nonscarring alopecia can be induced by a single treatment with high-fluence ruby laser pulses. Miniaturization of the terminal Hair follicles seems to account for this response.
