Study on the Influence of Urine Flow on Accuracy of Urinary Bladder Temperature Monitoring in Critically Ill Patients

AbstractCore temperature (TCore) monitoring is essential in intensive care medicine. Bladder temperature is the standard of care in many institutions, but not possible in all patients. We therefore compared core temperature measured with a zero-heat flux thermometer (TZHF) and with a bladder catheter (TBladder) against blood temperature (TBlood) as a gold standard in 50 critically ill patients in a prospective, observational study. Every 30 min TBlood, TBladder and TZHF were documented simultaneously. Bland–Altman statistics were used for interpretation. 7018 pairs of measurements for the comparison of TBlood with TZHF and 7265 pairs of measurements for the comparison of TBlood with TBladder could be used. TBladder represented TBlood more accurate than TZHF. In the Bland Altman analyses the bias was smaller (0.05 °C vs. − 0.12 °C) and limits of agreement were narrower (0.64 °C to − 0.54 °C vs. 0.51 °C to – 0.76 °C), but not in clinically meaningful amounts. In conclusion the results for zero-heat-flux and bladder temperatures were virtually identical within about a tenth of a degree, although TZHF tended to underestimate TBlood. Therefore, either is suitable for clinical use.German Clinical Trials Register, DRKS00015482, Registered on 20th September 2018, http://apps.who.int/trialsearch/Trial2.aspx?TrialID=DRKS00015482.

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Urinary bladder temperature monitoring in extensively burned patients

Journal of Clinical Monitoring and Computing ◽

10.1007/bf01616921 ◽

1993 ◽

Vol 9 (2) ◽

pp. 99-100 ◽

Cited By ~ 2

Author(s):

Hitoshi Imaizumi ◽

Kazumasa Tsunoda ◽

Naohiro Ichimiya ◽

Tetsunori Okamoto ◽

Akiyoshi Namiki

Keyword(s):

Urinary Bladder ◽

Temperature Monitoring ◽

Bladder Temperature

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Temporal artery temperature measurements versus bladder temperature in critically ill patients, a prospective observational study

PLoS ONE ◽

10.1371/journal.pone.0241846 ◽

2020 ◽

Vol 15 (11) ◽

pp. e0241846

Author(s):

Eline G. M. Cox ◽

Willem Dieperink ◽

Renske Wiersema ◽

Frank Doesburg ◽

Ingeborg C. van der Meulen ◽

...

Keyword(s):

Clinical Practice ◽

Critically Ill ◽

Subgroup Analysis ◽

Critically Ill Patients ◽

A Priori ◽

Reference Method ◽

Temporal Artery ◽

Test Method ◽

Temperature Measurements ◽

Bladder Temperature

Purpose Accurate measurement of body temperature is important for the timely detection of fever or hypothermia in critically ill patients. In this prospective study, we evaluated whether the agreement between temperature measurements obtained with TAT (test method) and bladder catheter-derived temperature measurements (BT; reference method) is sufficient for clinical practice in critically ill patients. Methods Patients acutely admitted to the Intensive Care Unit were included. After BT was recorded TAT measurements were performed by two independent researchers (TAT1; TAT2). The agreement between TAT and BT was assessed using Bland-Altman plots. Clinical acceptable limits of agreement (LOA) were defined a priori (<0.5°C). Subgroup analysis was performed in patients receiving norepinephrine. Results In total, 90 critically ill patients (64 males; mean age 62 years) were included. The observed mean difference (TAT-BT; ±SD, 95% LOA) between TAT and BT was 0.12°C (-1.08°C to +1.32°C) for TAT1 and 0.14°C (-1.05°C to +1.33°C) for TAT2. 36% (TAT1) and 42% (TAT2) of all paired measurements failed to meet the acceptable LOA of 0.5°C. Subgroup analysis showed that when patients were receiving intravenous norepinephrine, the measurements of the test method deviated more from the reference method (p = NS). Conclusion The TAT is not sufficient for clinical practice in critically ill adults.

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