Advanced

Thermal responses to whole-body cooling in air with special reference to arteriovenous anastomoses in fingers

Vanggaard, Leif; Kuklane, Kalev LU ; Holmér, Ingvar LU and Smolander, Juhani (2012) In Clinical Physiology and Functional Imaging 32(6). p.463-469
Abstract
The arteriovenous anastomoses (AVAs) in the distal parts of the extremities play a significant role in the heat exchange with the environment. The aim of the study was to examine the thermal responses to whole-body cooling in air, and especially the behaviour of finger skin temperature (Tf, rich in AVAs). Eight young men sat in minimal clothing at 32°C air temperature (Ta), which was then lowered gradually to 13°C in 100 min. In the beginning of cooling, Tf was high and fluctuating, and then suddenly exhibited a rapid fall, while temperatures in other skin sites fell fairly linearly along decreasing Ta to the end of cooling. During the period from start to the rapid fall in Tf, rectal temperature decreased from 37.4°C (SD 0.2) to 37.2°C... (More)
The arteriovenous anastomoses (AVAs) in the distal parts of the extremities play a significant role in the heat exchange with the environment. The aim of the study was to examine the thermal responses to whole-body cooling in air, and especially the behaviour of finger skin temperature (Tf, rich in AVAs). Eight young men sat in minimal clothing at 32°C air temperature (Ta), which was then lowered gradually to 13°C in 100 min. In the beginning of cooling, Tf was high and fluctuating, and then suddenly exhibited a rapid fall, while temperatures in other skin sites fell fairly linearly along decreasing Ta to the end of cooling. During the period from start to the rapid fall in Tf, rectal temperature decreased from 37.4°C (SD 0.2) to 37.2°C (0.2), mean skin temperature (Tsk) from 34.6°C (05) to 31.2°C (2.0) and whole-body thermal sensation from ‘slightly warm/warm’ to ‘slightly cool/cold’. The start of the steep fall in Tf varied considerably between individuals in terms of time (2–75 min), Ta (16.7–32.0°C) and Tsk (28.8–34.7°C). On the other hand, the range of Tf at that point was narrower (32.1–35.8°C). The findings stress the importance of taking into account the distal skin temperatures in thermoregulatory studies in addition to the ordinarily used more proximal and central skin sites. Also, it might be advisable to start such experiments with relatively high and fluctuating Tf to guarantee that the thermal state of the subject is well defined. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
arteriovenous anastomoses, cold, gradual cooling, skin temperature, thermoregulation, thermal sensation
in
Clinical Physiology and Functional Imaging
volume
32
issue
6
pages
463 - 469
publisher
Wiley Online Library
external identifiers
  • wos:000309393700007
  • scopus:84867120177
ISSN
1475-0961
DOI
10.1111/j.1475-097X.2012.01151.x
language
English
LU publication?
yes
id
794e7b69-d851-494e-aef5-b47c2df40b23 (old id 3166251)
date added to LUP
2012-12-03 10:19:57
date last changed
2017-11-05 03:20:04
@article{794e7b69-d851-494e-aef5-b47c2df40b23,
  abstract     = {The arteriovenous anastomoses (AVAs) in the distal parts of the extremities play a significant role in the heat exchange with the environment. The aim of the study was to examine the thermal responses to whole-body cooling in air, and especially the behaviour of finger skin temperature (Tf, rich in AVAs). Eight young men sat in minimal clothing at 32°C air temperature (Ta), which was then lowered gradually to 13°C in 100 min. In the beginning of cooling, Tf was high and fluctuating, and then suddenly exhibited a rapid fall, while temperatures in other skin sites fell fairly linearly along decreasing Ta to the end of cooling. During the period from start to the rapid fall in Tf, rectal temperature decreased from 37.4°C (SD 0.2) to 37.2°C (0.2), mean skin temperature (Tsk) from 34.6°C (05) to 31.2°C (2.0) and whole-body thermal sensation from ‘slightly warm/warm’ to ‘slightly cool/cold’. The start of the steep fall in Tf varied considerably between individuals in terms of time (2–75 min), Ta (16.7–32.0°C) and Tsk (28.8–34.7°C). On the other hand, the range of Tf at that point was narrower (32.1–35.8°C). The findings stress the importance of taking into account the distal skin temperatures in thermoregulatory studies in addition to the ordinarily used more proximal and central skin sites. Also, it might be advisable to start such experiments with relatively high and fluctuating Tf to guarantee that the thermal state of the subject is well defined.},
  author       = {Vanggaard, Leif and Kuklane, Kalev and Holmér, Ingvar and Smolander, Juhani},
  issn         = {1475-0961},
  keyword      = {arteriovenous anastomoses,cold,gradual cooling,skin temperature,thermoregulation,thermal sensation},
  language     = {eng},
  number       = {6},
  pages        = {463--469},
  publisher    = {Wiley Online Library},
  series       = {Clinical Physiology and Functional Imaging},
  title        = {Thermal responses to whole-body cooling in air with special reference to arteriovenous anastomoses in fingers},
  url          = {http://dx.doi.org/10.1111/j.1475-097X.2012.01151.x},
  volume       = {32},
  year         = {2012},
}