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  • 1.
    Leijon-Sundqvist, Katarina
    et al.
    Luleå University of Technology, Department of Health Sciences, Medical Science.
    Lehto, Niklas
    Luleå University of Technology, Department of Health Sciences, Medical Science.
    Juntti, Ulla
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Operation, Maintenance and Acoustics. Performance in Cold AB, Luleå.
    Karp, Kjell
    Heart Centre, Clinical Physiology, Department of Surgical and Perioperative Sciences, Umeå University.
    Andersson, Staffan
    Luleå University of Technology, Department of Health Sciences, Medical Science.
    Tegner, Yelverton
    Luleå University of Technology, Department of Health Sciences, Medical Science.
    Thermal response after cold-water provocation of hands in healthy young men2015In: Thermology International, ISSN 1560-604X, Vol. 25, no 2, p. 48-53Article in journal (Refereed)
    Abstract [en]

    The thermal response in hands provoked by cold water was investigated with infrared thermography. In 26 healthy young men, the response of hand skin temperature to cold water provocation was measured twice on consecutive days. An infrared thermographic camera was used and data were processed in real time. The software divides each hand into 18 predefined regions of interest (ROI). The average temperature in each ROI was stored every 10th second. Baseline hand skin temperature was recorded for two minutes. The bare hands were then immersed for 30 seconds in water at 10°C × 0.5°C and carefully dried. Thereafter, the cooled and final hand skin temperature was measured. The baseline showed a higher average temperature of 0.3°C on day 2 and the 95% limits of agreement (LOA) were - 5.2-5.8, the cooled average temperatures showed no significant difference between the two days (LOA: - 4.8-4.6) and the average final hand skin temperature was 0.8°C higher on day 2 (LOA: - 5.2-6.4). In conclusion, there was variability between the two measurements, small differences in the temperature response to the reaction to cold-water provocation - probably due to Day 1 stress factor.

  • 2.
    Leijon-Sundqvist, Katarina
    et al.
    Luleå University of Technology, Department of Health Sciences, Medical Science.
    Lehto, Niklas
    Luleå University of Technology, Department of Health Sciences, Medical Science.
    Juntti, Ulla
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Operation, Maintenance and Acoustics.
    Karp, Kjell
    Umeå university.
    Tegner, Yelverton
    Luleå University of Technology, Department of Health Sciences, Medical Science.
    Cold-water provocation of hands: An evaluation of different provocations2015In: Thermology International, ISSN 1560-604X, Vol. 25, no 3, p. 122-123Article in journal (Refereed)
  • 3.
    Leijon-Sundqvist, Katarina
    et al.
    Luleå University of Technology, Department of Health Sciences, Medical Science.
    Tegner, Yelverton
    Luleå University of Technology, Department of Health Sciences, Medical Science.
    Juntti, Ulla
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Operation, Maintenance and Acoustics. Performance in Cold AB, Luleå.
    Karp, Kjell
    Division of Clinical Physiology, Department of Surgical and Perioperative Sciences, Umeå University.
    Lehto, Niklas
    Luleå University of Technology, Department of Health Sciences, Medical Science.
    Hand skin temperature: are there warm and cold rewarming patterns after cold stress test?2016In: Thermology International, ISSN 1560-604X, Vol. 26, no 3, p. 81-87Article in journal (Refereed)
    Abstract [en]

    In 116 thermographic measurements of 66 healthy male participants, 44 of whom were measured at least twice, hand skin temperature distributions before and after a cold stress test (CST) were examined to identify any typical characteristics of hand skin rewarming. On each hand, measurements from 18 regions of interest recorded every 10 s were used to calculate the surface average temperature. Temperatures at baseline (Tb), directly after cooling (Tc), and after 15 min of rewarming (Tf) were used for comparison and the averages of each finger, palm, and hand were analyzed. Using fits of normal distribution for the measured data, final hand skin temperatures were divided into two groups, A and B, with a calculated boundary at 25.4 °C. Digital analyses of all thermograms were performed to describe the process, and each group's rewarming patterns were observed. Group A was considered to demonstrate warm rewarming, since the whole hands reached a Tf approximately equal to the Tb. By contrast, Group B demonstrated cold rewarming and had whole hand Tf less than Tb. The predictive value of Tc was lower than that of Tb in Group A, whereas the opposite occurred in Group B. Altogether, the findings suggest different hand skin temperature rewarming patterns in healthy males.

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