Facial photo rejuvenation using two different intense pulsed light (IPL) wavelength bands

Bjerring, Peter; Christiansen, Kåre; Troilius, Agneta; Dierickx, Christine

doi:10.1002/lsm.20000

Cited by 65 publications

(56 citation statements)

References 23 publications

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“…Using IPL, a better clearance was observed in patients treated for visible teleangiectatic vessels when compared to patients with diffuse erythema composed of much smaller vessels [1]. It is also reported that shorter wavelengths (530-750 nm) of IPL, which is comparable to our VSS yielded better vessel clearance than longer wavelengths (555-950 nm) of IPL, which comparable to our NIRSS.…”

Section: Effects Of Vessel Sizesupporting

confidence: 86%

“…The emission of an IPL shows a broadband spectrum of several hundreds of nanometer [1]. This would require the calculation of photon propagations for each single wavelength within the IPL spectrum, which may take significant amount of time to accomplish, even for one set of parameters.…”

Section: Photon Distribution In Ipl Spectramentioning

confidence: 99%

“…2b). These two spectra may represent the full bandwidth of IPL used in clinical practice [1][2][3][4][5][6]. It is obvious that the VSS spectrum Fig.…”

Section: Photon Distribution In Ipl Spectramentioning

confidence: 99%

“…The pulse duration was about 5 milliseconds using triple pulses [22]. Bjerring et al [1] show a table of pulse durations and radiant exposures when using IPL for different vessels sizes. For teleangiectasia, he recommends pulse durations of 15 to 30 milliseconds and a radiant exposure of 11.5 to 22 J/cm 2 , whereas for diffuse erythema (small vessels) a pulse duration of about 5 to 12 milliseconds and a radiant exposure of about 9 to 17 J/cm 2 .…”

Section: Effects Of Heatingmentioning

confidence: 99%

“…Broadband light emission of intense pulsed light (IPL) sources have been successfully used in dermatology for the treatment of various skin conditions including vascular disorders [1][2][3][4][5][6]. The mechanism of action of lasers in the treatment of vascular disorders is related to their selective absorption by hemoglobin within the blood vessels.…”

Section: Introductionmentioning

confidence: 99%

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The effects of intense pulsed light (IPL) on blood vessels investigated by mathematical modeling

et al. 2006

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Background and Objectives: Intense pulsed light (IPL) sources have been successfully used for coagulation of blood vessels in clinical practice. However, the broadband emission of IPL hampers the clinical evaluation of optimal light parameters. We describe a mathematical model in order to visualize the thermal effects of IPL on skin vessels, which was not available, so far. Study Design/Materials and Methods: One IPL spectrum was shifted towards the near infrared range (near IR shifted spectrum: NIRSS) and the other was heavily shifted toward the visible range (visible shifted spectrum: VSS). The broadband emission was separated in distinct wavelengths with the respective relative light intensity. For each wavelength, the light and heat diffusion equations were simultaneously solved with the finite element method. The thermal effects of all wavelengths at the given radiant exposure (15 or 30 J/cm 2 ) were added and the temperature in the vessels of varying diameters (60, 150, 300, 500 mm) was calculated for the entire pulse duration of 30 milliseconds. Results: VSS and NIRSS both provided homogeneous heating in the entire vessel. With the exception of the small vessels (60 mm), which showed only a moderate temperature increase, all vessels exhibited a temperature raise within the vessel sufficient for coagulation with each IPL parameter. The time interval for effective temperature raise in larger vessels (diameter > 60 mm) was clearly shorter than the pulse duration. In most instances, the vessel temperature was higher for VSS when compared to NIRSS. Conclusions: We presented a mathematical model capable of calculating the photon distribution and the thermal effects of the broadband IPL emission within cutaneous blood vessels.

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Section: Effects Of Vessel Sizesupporting

confidence: 86%

Section: Photon Distribution In Ipl Spectramentioning

confidence: 99%

“…2b). These two spectra may represent the full bandwidth of IPL used in clinical practice [1][2][3][4][5][6]. It is obvious that the VSS spectrum Fig.…”

Section: Photon Distribution In Ipl Spectramentioning

confidence: 99%

Section: Effects Of Heatingmentioning

confidence: 99%