🤔MEASUREMENT OF CORE BODY TEMPERATURE: FAQs
❓What’s the problem, if we place the temperature probe in upper 1/3rd or 2/3rd of the esophagus?
✔️Esophageal temperature should be taken from the lower third of the oesophagus; placed above this level, the probe may under-read due to cooling effect of inspired gases. It gives a good estimate of cerebral blood temperature.
❓What’s the advantage of nasopharyngeal temperature measurement over oesophageal measurement?
✔️The nasopharyngeal temperature probe is placed just behind the soft palate. The advantage is that it is more accessible compared to the oesophageal temperature measurement. The disadvantage is that it is less accurate in representating the core temperature.
❓What are the advantages of measurement of temperature @ Tympanic membrane?
✔️The tympanic membrane provides an accurate representation of hypothalamic temperature. It is less invasive, has a short response time and correlates well with oesophageal temperature. But it does not allow continuous measurements.
❓What is the best method for CONTINUOUS measurement of core temperature?
✔️Blood temperature measurement using a pulmonary artery flotation catheter
❓What are the factors reducing the accuracy of Rectal temperature measurement?
✔️Rectal temperature is influenced by heat generated from gut flora, the cooling effect of blood returning from the lower limbs and the insulation of the probe by faeces. It is normally about 0.5–1.0 ° C higher than core temperature and has a slow response time.
❓Can you say an e.g. of utilising the temperature gradients existing between different sites of the body for clinical advantage?
✔️The gradient between a skin temperature and a core temperature can be used as a marker of peripheral perfusion.