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. 2020 Apr 8;11(5):2431-2446.
doi: 10.1364/BOE.387481. eCollection 2020 May 1.

Use of infrared thermography to detect early alterations of peripheral perfusion: evaluation in a porcine model

Mathieu Magnin  1   2 , Stephane Junot  1   3 , Martina Cardinali  1   3 , Jean Yves Ayoub  1   2 , Christian Paquet  1   2 , Vanessa Louzier  1   2 , Jeanne Marie Bonnet Garin  1   2 , Bernard Allaouchiche  1   4
Affiliations

Use of infrared thermography to detect early alterations of peripheral perfusion: evaluation in a porcine model

Mathieu Magnin et al. Biomed Opt Express. .

Abstract

This study aimed to evaluate the variations of infrared thermography according to rapid hemodynamic changes, by measuring the peripheral skin temperature in a porcine model. Eight healthy piglets were anesthetized and exposed to different levels of arterial pressure. Thermography was performed on the left forelimb to measure carpus and elbow skin temperature and their associated gradient with the core temperature. Changes in skin temperature in response to variations of blood pressure were observed. A negative correlation between arterial pressure and temperature gradients between peripheral and core temperature and a negative correlation between cardiac index and these temperature gradients were observed. Thermography may serve as a tool to detect early changes in peripheral perfusion.

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Conflict of interest statement

The authors declare that there are no conflicts of interest related to this article.

Figures

Fig. 1.
Fig. 1.
Study design (MAC: minimum alveolar concentration, MAP: mean arterial pressure).
Fig. 2.
Fig. 2.
Placement of the left foreleg during the study (white arrow: rope placed around the metacarpus to maintain the foreleg).
Fig. 3.
Fig. 3.
Analysis of a thermographic image (A circle of 20 cm2 was drawn on the elbow and a circle of 10 cm2 was drawn over the carpus for the measure of the mean temperature; Te: elbow mean temperature, Tca: carpus mean temperature).
Fig. 4.
Fig. 4.
Boxplots describing the course of (Tc – Te) (a), (Tc – Tca) (b), MAP (c), CI (d) and PPV (e) over time points. On the abscissa: Time points (A: Baseline, B: Bolus 1, C: Hypotension 1, D: Normotension 1, E: Hypertension 1, F: Normotension 2, G: Hypotension 2, H: Bolus 2, I: Hypertension 2, J: Hypotension 3). On ordinate: Tc: central temperature. Te: elbow temperature. Tca: carpus temperature; MAP: mean arterial pressure; CI: cardiac index; PPV: pulse pressure variation, * P < 0.05.
Fig. 5.
Fig. 5.
Representation of (Tc – Tca) and (Tc – Te) as a function of MAP (Tc: central temperature, Te: elbow temperature, Tca: carpus temperature, MAP: mean arterial pressure).
See this image and copyright information in PMC

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