Sympathetic skin vasoconstriction--further evaluation using laser Doppler techniques

F Holmlund, Carolin Freccero, S Bornmyr, J Castenfors, A-M Johansson, J Nordquist, Göran Sundkvist, H Svensson, Per Wollmer

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskriftPeer review

6 Citeringar (SciVal)

Sammanfattning

The aim of this study was to quantify the reflex sympathetic vasoconstriction in skin at different depths. Twenty healthy subjects were studied. Finger skin blood flow was measured using laser Doppler perfusion imaging (LDPI) and laser Doppler perfusion monitoring (LDPM). In LDPM, a probe with fibres separated 0.25 mm (deep) and 0.14 mm (superficial) from the illuminating fibre was used. Local heating (40 degrees C) was achieved with a Peltier element, and reflex vasoconstriction induced by immersion of the contra-lateral hand and forearm for 3 min in water at 15 degrees C. The change in skin blood flow was measured and a vasoconstriction index (VAC: cooling/before cooling) calculated. VAC indices of LDPI, LDPM-0.25 and LDPM-0.14 were 0.60, 0.59 and 0.60, respectively. The two components of the LDPM perfusion value, blood cell velocity and concentration, were studied separately. Their contributions in LDPM-0.25 were roughly the same, whereas the velocity component dominated in LDPM-0.14, although their relative responses in the two channels were similar. We conclude that sympathetic skin vasoconstriction does not significantly differ in two compartments, as probed with fibres separated by 0.25 and 0.14 mm. Blood cell velocity is influenced in a proportional way, as is concentration.
Originalspråkengelska
Sidor (från-till)287-291
TidskriftClinical Physiology
Volym21
Utgåva3
DOI
StatusPublished - 2001

Bibliografisk information

The information about affiliations in this record was updated in December 2015.
The record was previously connected to the following departments: Reconstructive Surgery (013240300), Diabetes Epidemiology and Neuropathy (013241560), Clinical Physiology and Nuclear Medicine Unit (013242320)

Ämnesklassifikation (UKÄ)

  • Radiologi och bildbehandling
  • Kirurgi
  • Endokrinologi och diabetes

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