Search results for "Skin blood flow"

LASCA and PPG imaging for non-contact assessment of skin blood supply

2013

Laser speckle contrast analysis (LASCA) offers a non-contact, full-field, and real-time mapping of capillary blood flow and can be considered as an alternative method to Laser Doppler perfusion imaging (LDPI). Photoplethysmography (PPG) is well known technique for assessment of skin blood pulsations that can be related to blood flow. In recent years several studies have been done on development of non-contact PPG imaging (PPGI). LASCA and PPGI techniques are simpler and cheaper compared with LDPI. LASCA technique has been implemented in several commercial instruments. However, these systems are still too expensive and bulky to be widely available. Several optical techniques have found new i…

Untersuchungen �ber die Beurteilung der Hautdurchblutung durch zentrale und periphere Temperaturmessungen

1974

Zur Diagnose und Therapie eines Schockgeschehens sind neben zentralen Parametern auch Angaben uber die periphere Durchblutung notwendig. Das am einfachsten zu erreichende Capillargebiet ist das der Haut. Die Hautdurchblutung stellt den wichtigsten Regulator fur den Warmestrom dar, so das ein Zusammenhang zwischen Hauttemperatur und Hautdurchblutung zu erwarten ist. Vergleiche der tatsachlichen Hautdurchblutung gemessen durch Δλ mit verschiedenen Hauttemperaturen, integrierte Hauttemperatur und Burton-Indices liesen keinen Zusammenhang erkennen. Jedoch ist die Korrelation mit der Rectum-Zehen-Temperaturdifferenz ΔT statistisch hoch signifikant. Sie kann ohne technischen Aufwand als orientier…

Implementation of laser speckle contrast analysis as connection kit for mobile phone for assessment of skin blood flow

2014

Laser speckle contrast analysis (LASCA) offers a non-contact, full-field, and real-time mapping of capillary blood flow and can be considered as an alternative method to Laser Doppler perfusion imaging. LASCA technique has been implemented in several commercial instruments. However, these systems are still too expensive and bulky to be widely available. Several optical techniques have found new implementations as connection kits for mobile phones thus offering low cost screening devices. In this work we demonstrate simple implementation of LASCA imaging technique as connection kit for mobile phone for primary low-cost assessment of skin blood flow. Stabilized 650 nm and 532 nm laser diode m…

Autonomic Effects on the Skin

2009

Inflammation and impaired endothelium-dependant vasodilatation in non obese women with gestational diabetes mellitus: preliminary results

2013

International audience; BACKGROUND: To evaluate whether abnormal endothelial function, a common finding in gestational diabetes mellitus (GDM) pregnancies, can be explained by inflammatory cytokines. METHODS: Forearm skin blood flow (FSBF), into response to acetylcholine (Ach) (endothelium-dependent vasodilatation), were measured in 24 pregnant control subjects and 28 gestational diabetes mellitus (GDM) women, in the third trimester of gestation. A fasting glycemic and lipidic panel was obtained, and inflammatory cytokines (TNF-alpha and IL-6) and adiponectin were also determined. RESULTS: FSBF is significantly reduced in GDM group compared with control subjects (344.59 +/- 57.791 vs.176.38…

The Use of infrared thermography in the study of sport and exercise physiology

2016

Infrared thermography (IRT) is considered an upcoming, promising methodology in the field of exercise physiology. Skin temperature distribution derives from muscular activity, skin blood flow as well as perspiration patterns in specific body parts. This chapter aims to provide a general overview on the literature about the study of the skin temperature response to exercise assessed by means of IRT and its relationship with other thermoregulatory variables, exercise characteristics and performance factors.