Use of subcutaneous transponders to monitor body temperature in laboratory rats

Pato, Alejandro Martín; Romero, Delfina M.; Holt, Carla S. Sosa; Nemirovsky, Sergio I.; Wolansky, Marcelo Javier

doi:10.1016/j.vascn.2021.107145

Cited by 2 publications

(1 citation statement)

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“…Although the aim of this work was not compare temperature in cats under different conditions (normal, hospitalized, sedated/anesthetized), it is clear that differences in temperature between individuals are connected to their health status. Hyperthermia can be produced in rats using neurotoxic agents, which affect central thermoregulation ( 57 ). Also, nociceptive stimuli can cause temperature changes, due to activation of the sympathetic adrenomedullary system [released catecholamines activate adrenoceptors in vascular smooth muscle, which alters blood flow, blood pressure, heart rate and respiratory rate and can alter both peripheral and core temperature ( 58 )].…”

Section: Discussionmentioning

confidence: 99%

Correlation of temperature-sensing microchip and rectal temperature measurements in cats

Goig,

Godino,

Tejedor

et al. 2024

Front. Vet. Sci.

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IntroductionRectal temperature (RT) is the reference standard for clinical evaluation of body temperature in mammals. However, the use of a rectal thermometer to measure temperature can cause stress and other problems, especially in cats. There is a need for clinical techniques that reduce both stress and defensive behavior as part of the provision of better medical care. Subcutaneous temperature-sensing identification microchips fulfil the current legal requirements and provide a reading of subcutaneous temperature (MT).MethodsThe clinical study tried to determine whether there is agreement between MT and RT in normal (n = 58), hospitalized (n = 26) and sedated/anesthetized (n = 36) cats. Three measurements were taken using both methods (MT and RT) in each cat. Correlation between MT and RT, and differences between MT and RT, were estimated for pairs of data-points from the same individual, and all data pairs in each group were considered overall.ResultsThere was a strong positive correlation between MT and RT (r = 0.7 to 1.0) (p < 0.0005). The mean differences (d) were always negative and although statistically significant, these d values are likely of no biological importance. The overall d was ‑0.1°C in normal cats (p < 0.0005), -0.1°C in hospitalized cats (p = 0.001) and -0.1°C in sedated/anesthetized cats (p = 0.001). The limits of agreement between MT and RT appear narrow enough for MT to be acceptable estimate of RT. The overall limits of agreement (95%) were ‑0.71°C and 0.53°C (in normal cats); ‑0.51°C and 0.34°C (in hospitalized cats) and ‑0.60°C and 0.42°C (in sedated/anesthetized cats).DiscussionMT may provide a good alternative to RT measurement in cats. However, this study was mostly performed in animals that were normothermic. Therefore, further studies in larger groups of cats under different conditions are needed to compare trends and assess variation with time.

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Section: Discussionmentioning

confidence: 99%