Cutaneous Photobiology

Hawk, J.L.M.; Young, Andrew; Ferguson, J.

doi:10.1002/9781444317633.ch29

Cited by 13 publications

(12 citation statements)

References 186 publications

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“…Although both UVA (320–400 nm) and B (280–320 nm) are harmful to the skin, it is the UVB component that is responsible for acute skin damage. [ 15 ]…”

Section: Xerosismentioning

confidence: 99%

High altitude dermatology

Singh

2017

Indian J Dermatol

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Approximately, 140 million people worldwide live permanently at high altitudes (HAs) and approximately another 40 million people travel to HA area (HAA) every year for reasons of occupation, sports or recreation. In India, whole of Ladakh region, part of Northwest Kashmir, Northern part of Sikkim and Tenga valley of Arunachal are considered inhabited areas of HAA. The low quantity of oxygen, high exposure of ultraviolet (UV) light, very low humidity, extreme subzero temperature in winter, high wind velocity, make this region difficult for lowlanders as well as for tourists. Acute mountain sickness, HA pulmonary edema, HA cerebral edema, and thromboembolic conditions are known to occur in HA. However, enough knowledge has not been shared on dermatoses peculiar to this region. Xerosis, UV-related skin disorders (tanning, photomelanosis, acute and chronic sunburn, polymorphic light eruption, chronic actinic dermatitis, actinic cheilitis, etc.), cold injuries (frostbite, chilblains, acrocyanosis, erythrocyanosis, etc.) nail changes (koilonychias), airborne contact dermatitis, insect bite reaction, and skin carcinoma (basal cell carcinomas, squamous cell carcinomas, and also rarely malignant melanoma) are the dermatoses seen in HAAs. Early diagnosis and knowledge of HA dermatoses may prevent serious consequences of disease and improve the quality of life for the visitors as well as for native of the place.

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“…Although both UVA (320–400 nm) and B (280–320 nm) are harmful to the skin, it is the UVB component that is responsible for acute skin damage. [ 15 ]…”

Section: Xerosismentioning

confidence: 99%

High altitude dermatology

Singh

2017

Indian J Dermatol

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“…The area adjacent to the Gulf of Suez, which represents an extension of Mediterranean coastal conditions, is arid and has an annual rainfall of 20–100 mm. The high inlands and the area along the Gulf of Aqaba are classified as hyper‐arid and have a cool winter (mean temperature in the coldest month is 0–10 °C) and hot summer with low relative humidity of 10–20% that rarely exceeds 50% 4 …”

Section: Introductionmentioning

confidence: 99%

Epidemiologic study of dermatologic disorders among children in South Sinai, Egypt

Yamamah¹,

Emam

Abdelhamid

et al. 2012

Int J Dermatology

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“…660 nm have been used as the gold-standard wavelength for H bO 2 measurement [19]; 740 nm wavelength is primary used for our sensor [22], [26]. For H bO 2 and H H b measurements, UV and visible violet to blue light (from about 200 to 500 nm) are not suitable due to skin absorption characteristics [25]. Approximatively, [500-530] nm, [545-570] nm and [585-800] nm wavelength ranges could be used for H bO 2 measurements while above 800 nm wavelengths could be used for H H b measurement due to their respective transparencies to those wavelengths and to that of the other investigated compound (H H b and H bO 2 respectively) [19].…”

Section: A Device Propertiesmentioning

confidence: 99%

“…With a closed loop system, the LED intensities and the signal amplification are adjusted according to the digitalized and filtered signal in order to maintain it within a satisfactory potential range. The Fitzpatrick scale is a common way of classifying the six main categories of human skin tones; used for dermatological purposes, it helps predicting skin response to UV light based on skin pigmentation (or melanin) level [25]. The Fitzpatrick scale is divided into six skin tones from very fair (1) to very dark (6) [13], [25].…”

Section: A Device Propertiesmentioning

confidence: 99%

A Self-Calibrated Tissue Viability Sensor for Free Flap Monitoring

Berthelot

Yang

2018

IEEE J. Biomed. Health Inform.

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In fasciocutaneous free flap surgery, close postoperative monitoring is crucial for detecting flap failure, as around 10% of cases require additional surgery due to compromised anastomosis. Different biochemical and biophysical techniques have been developed for continuous flap monitoring, however, they all have shortcoming in terms of reliability, elevated cost, potential risks to the patient, and inability to adapt to the patient's phenotype. A wearable wireless device based on near infrared spectroscopy has been developed for continuous blood flow and perfusion monitoring by quantifying tissue oxygen saturation (). This miniaturized and low-cost device is designed for postoperative monitoring of flap viability. With self-calibration, the device can adapt itself to the characteristics of the patients' skin such as tone and thickness. An extensive study was conducted with 32 volunteers. The experimental results show that the device can obtain reliable measurements across different phenotypes (age, sex, skin tone, and thickness). To assess its ability to detect flap failure, the sensor was tested in a pilot animal study. Free groin flaps were performed on 16 Sprague Dawley rats. Results demonstrate the accuracy of the sensor in assessing flap viability and identifying the origin of failure (venous or arterial thrombosis).

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Cutaneous Photobiology

Cited by 13 publications

References 186 publications

High altitude dermatology

High altitude dermatology

Epidemiologic study of dermatologic disorders among children in South Sinai, Egypt

A Self-Calibrated Tissue Viability Sensor for Free Flap Monitoring

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