scholarly journals Relationship between Rectal Temperature and Vaginal Temperature in Grazing Bos taurus Heifers

Animals ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 156 ◽  
Author(s):  
Angela Lees ◽  
Jim Lea ◽  
Hannah Salvin ◽  
Linda Cafe ◽  
Ian Colditz ◽  
...  
Keyword(s):  
Body Temperature ◽  
Rectal Temperature ◽  
Bos Taurus ◽  
Core Body Temperature ◽  
Strong Relationship ◽  
Reliable Estimate ◽  
Data Loggers ◽  
Core Body ◽  
The Relationship ◽  
Vaginal Temperature

This study evaluated the relationship between rectal temperature (TREC, °C) and vaginal temperature (TVAG, °C) in grazing Bos taurus heifers, to develop an understanding of the reliability of these measures as estimates of core body temperature. Nineteen Angus heifers (BW = 232.2 ± 6.91 kg) were implanted with intra-rectal and intra-vaginal data loggers. Rectal temperature and TVAG were simultaneously recorded at 20 s intervals over 18.5 h. Heifers were housed as a singular cohort on grazing pastures for the duration of the study. A strong linear relationship (R2 = 0.72, p < 0.0001) between the measurement sites was identified. The mean difference between TREC and TVAG was small, in which TVAG was on average 0.22 ± 0.01 °C lower than TREC. Individual twenty second TREC and TVAG data were used to determine the pooled mean TREC and TVAG and then to highlight the within measure variation over time. The coefficient of variation was, on average, lower (p < 0.001) for TVAG (0.38%) than TREC (0.44%), indicating that TVAG exhibited less variation. Overall, the results from the current study suggest that a strong relationship exists between TREC and TVAG, and that TVAG may be a more reliable estimate of core body temperature than TREC in grazing Bos taurus heifers.

Perioperative Core Body Temperatures Effect on Outcome after Colorectal Resections

2012 ◽  
Vol 78 (5) ◽  
pp. 607-612 ◽  
Author(s):  
Timothy M. Geiger ◽  
Sara Horst ◽  
Roberta Muldoon ◽  
Paul E. Wise ◽  
Jesse Enrenfeld ◽  
...  
Keyword(s):  
Body Temperature ◽  
Length Of Stay ◽  
Core Body Temperature ◽  
Perioperative Period ◽  
World Health ◽  
Higher Temperature ◽  
Health Organization ◽  
Core Body ◽  
The Relationship ◽  
Postop Complication

The World Health Organization has set a standard of maintaining a core body temperature above 36°C in the perioperative period. The purpose of this study was to examine the relationship between both intraoperative temperature (IOT) and immediate postop core body temperature as it relates to postop complications. A retrospective analysis of a prospective database of patients who underwent an elective segmental colectomy without a stoma, for 3 diagnoses was performed. Six postoperative outcomes were examined: length of stay (LOS), placement of a nasogastric tube, return to the operating room, placement of an interventional drain, diagnosed leak, and surgical site infection (SSI). Statistics were calculated using a two-sample Wilcoxon rank-sum (Mann-Whitney) test. Seventy-nine patients met the inclusion criteria and there were no preoperative differences between the groups (those with a postop complication vs without). LOS > 9 days (36.64°C vs 35.98°C; P = 0.011) and clinical leak (37.06°C vs 35.99°C; P = 0.005) both had a statistically higher average IOT than those who did not. Patients with SSI trended to a higher IOT (36.44°C vs 35.99°C; P = 0.062). When the last IOT recorded was compared with the six outcomes, again length of stay and leak both were statistically significant ( P = 0.018, P = 0.012) showing a higher temperature related to a higher complication rate. No other complications were related to IOT, nor did postop temperature relate to complication. In our data, relatively lower IOTs were protective for LOS and clinical leaks, with a trend of lower SSI rates. Further research is needed to fully endorse or refute the absolute recommendations for core body temperature.

Long-term measurement of body temperature in the southern hairy-nosed wombat (Lasiorhinus latifrons)

2017 ◽  
Vol 39 (1) ◽  
pp. 48 ◽  
Author(s):  
K. A. Descovich ◽  
S. Johnston ◽  
A. Lisle ◽  
V. Nicolson ◽  
T. Janssen ◽  
...  
Keyword(s):  
Body Temperature ◽  
Ambient Temperature ◽  
Core Body Temperature ◽  
Late Winter ◽  
Comprehensive Picture ◽  
Burrow Use ◽  
Core Body ◽  
The Relationship ◽  
Environmental Temperatures

The southern hairy-nosed wombat (Lasiorhinus latifrons) is a nocturnal, fossorial marsupial that has evolved a range of physiological and behavioural adaptations to its semiarid environment. This study describes long-term core body temperature (Tb) of L. latifrons in a population with opportunities for behavioural thermoregulation through burrow use. Tb was measured hourly in 12 captive L. latifrons using implanted dataloggers over a 9-month period from late winter to late autumn. Data were examined for daily patterns, seasonal changes, sex differences and the relationship with environmental conditions (ambient temperature, den temperature and relative humidity). Tb ranged from 30.9 to 38.8°C, and had a distinct nychthemeral rhythm, with peak temperatures occurring at night in line with nocturnal activity. Females had a higher mean Tb (34.9°C) than males (34.4°C). The relationship between external ambient temperature and body temperature was negative, with body temperature decreasing as ambient temperature increased. This study is an important step towards a comprehensive picture of thermoregulation in L. latifrons, which may become vulnerable in the future if environmental temperatures rise and water availability decreases.

Comparison of estimated core body temperature measured with the BioHarness and rectal temperature under several heat stress conditions

2016 ◽  
Vol 13 (8) ◽  
pp. 612-620 ◽  
Author(s):  
Yongsuk Seo ◽  
Travis DiLeo ◽  
Jeffrey B. Powell ◽  
Jung-Hyun Kim ◽  
Raymond J. Roberge ◽  
...  
Keyword(s):  
Heat Stress ◽  
Body Temperature ◽  
Rectal Temperature ◽  
Core Body Temperature ◽  
Stress Conditions ◽  
Core Body

Effects of intermittent cold exposure varying in intensity on core body temperature and resting heat production of beef cattle

2001 ◽  
Vol 81 (4) ◽  
pp. 459-465 ◽  
Author(s):  
R. D. Bergen ◽  
A. D. Kennedy ◽  
R. J. Christopherson
Keyword(s):  
Body Temperature ◽  
Beef Cattle ◽  
Heat Production ◽  
Cold Exposure ◽  
Core Body Temperature ◽  
Daily Maximum ◽  
Adaptation Period ◽  
Temperature Rhythms ◽  
Core Body ◽  
Vaginal Temperature

Crossbred beef heifers (n = 18) fed at 1.3× maintenance were exposed to summer daytime temperatures (20 ± 0.2°C) for 8 h (08:00 until 16:00) and to control (22°C), moderate (–6°C) or cold (–15°C) environments for 16 h daily (16:00 until 08:00) for a minimum 21-d adaptation period to investigate the effects of in tensity of intermittent cold exposure on vaginal temperature and resting heat production. Resting heat production was measured at the end of the adaptation period. Vaginal temperature was continuously monitored throughout the experiment using radiotelemetry. Vaginal temperature increased immediately after the onset of cold exposure in both moderate and cold treatments, peaked after 3 h, and returned to pre-exposure levels by the time the 16-h treatment ended. In contrast, vaginal temperatures of control heifers peaked only after feeding at 08:30. Treatment did not affect daily maximum (P= 0.60), mean (P = 0.72) or minimum (P = 0.34) vaginal temperatures, but heifers in both cold-exposed treatments spent more time (P = 0.03) with vaginal temperatures exceeding the daily mean vaginal temperature than control heifers. Compared to control heifers, the variability of vaginal temperature increased 1.8- and 2.2-fold in the moderate and cold treatments, respectively (P = 0.04), and did not change with time (P = 0.98 ). Resting heat production did not increase following 21 d of exposure to moderate and cold conditions. Results of this study indicate that intermittent cold exposure influenced circadian body temperature rhythms without increasing resting heat production. Key words: Beef cattle, thermoregulation, vaginal temperature, heat production.

Ozone toxicity in the mouse: comparison and modeling of responses in susceptible and resistant strains

1996 ◽  
Vol 80 (6) ◽  
pp. 2134-2142 ◽  
Author(s):  
W. P. Watkinson ◽  
J. W. Highfill ◽  
R. Slade ◽  
G. E. Hatch
Keyword(s):  
Body Temperature ◽  
Continuous Monitoring ◽  
Core Body Temperature ◽  
Strain Differences ◽  
Hypothermic Response ◽  
Resistant Strains ◽  
Ozone Toxicity ◽  
Core Body ◽  
The Relationship ◽  
Old Mice

Previous studies from this laboratory have demonstrated a concentration-related hypothermia and increases in bronchoalveolar lavage (BAL) fluid indexes of toxicity in the rat after exposure to environmentally relevant levels of ozone (O3). In similar studies with C57BL/6J (B6) and C3H/HeJ (C3) mice, other investigators have reported differential effects on BAL toxicity indexes between the two strains after O3 exposure. The present study investigated the relationship between the reported strain differences in BAL parameters in B6 and C3 mice exposed to O3 and the induced hypothermic response. Male 80-day-old mice (n = 94, 47/strain) were used for these studies. Subsets (n = 8/strain) of these animals were surgically implanted with radiotelemetry transmitters that permitted continuous monitoring of core body temperature and activity. All telemetry animals and an equal number of nontelemetry animals (n = 8/strain) were exposed to filtered air for 24 h followed by a 2-h exposure to 2 parts/million 16O3. With use of a similar protocol, groups of nontelemetry mice (n = 12/strain) were exposed to either filtered air or 2 parts/million 16O3 for 2 h. At 0 or 22 h postexposure, mice were anesthetized with halothane and intubated, and their lungs were lavaged with 37 degrees C saline. Although both strains of mice exhibited significant abrupt decreases in core body temperature on exposure to O3 and both recovered rapidly after cessation of the O3 exposure, the response of the C3 mice was more dynamic than that of the B6 mice. Similarly, both strains showed characteristic changes in biomarkers of O3 toxicity; however, the increases in BAL fluid protein and cells at 22 h postexposure were significantly greater and the percentage of neutrophils was significantly less in B6 mice than in C3 mice. It is possible that the strain differences in BAL constituents may be related to the differences in the hypothermic response.

The relationship between core body temperature and 3,4-methylenedioxymethamphetamine metabolism in rats: implications for neurotoxicity

2007 ◽  
Vol 197 (2) ◽  
pp. 263-278 ◽  
Author(s):  
Beatriz Goni-Allo ◽  
Brian Ó Mathúna ◽  
Mireia Segura ◽  
Elena Puerta ◽  
Berta Lasheras ◽  
...  
Keyword(s):  
Body Temperature ◽  
Core Body Temperature ◽  
Core Body ◽  
The Relationship

scholarly journals Continuous and non-invasive thermography of mouse skin accurately describes core body temperature patterns, but not absolute core temperature

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Vincent van der Vinne ◽  
Carina A. Pothecary ◽  
Sian L. Wilcox ◽  
Laura E. McKillop ◽  
Lindsay A. Benson ◽  
...  
Keyword(s):  
Body Temperature ◽  
Near Infrared ◽  
Core Body Temperature ◽  
Mouse Skin ◽  
Invasive Procedure ◽  
The Body ◽  
Physiological Parameter ◽  
Reliable Estimate ◽  
Non Invasive ◽  
Core Body

AbstractBody temperature is an important physiological parameter in many studies of laboratory mice. Continuous assessment of body temperature has traditionally required surgical implantation of a telemeter, but this invasive procedure adversely impacts animal welfare. Near-infrared thermography provides a non-invasive alternative by continuously measuring the highest temperature on the outside of the body (Tskin), but the reliability of these recordings as a proxy for continuous core body temperature (Tcore) measurements has not been assessed. Here, Tcore (30 s resolution) and Tskin (1 s resolution) were continuously measured for three days in mice exposed to ad libitum and restricted feeding conditions. We subsequently developed an algorithm that optimised the reliability of a Tskin-derived estimate of Tcore. This identified the average of the maximum Tskin per minute over a 30-min interval as the optimal way to estimate Tcore. Subsequent validation analyses did however demonstrate that this Tskin-derived proxy did not provide a reliable estimate of the absolute Tcore due to the high between-animal variability in the relationship between Tskin and Tcore. Conversely, validation showed that Tskin-derived estimates of Tcore reliably describe temporal patterns in physiologically-relevant Tcore changes and provide an excellent measure to perform within-animal comparisons of relative changes in Tcore.

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