Changes in tracheal, oesophageal and rectal temperature over 60 minutes anaesthesia in non-heated dogs, spontaneously breathing or mechanically ventilated

Novak L, Burova J, Stankova L, Rado M (2021): Changes in tracheal, oesophageal and rectal temperature over 60 minutes anaesthesia in non-heated dogs, spontaneously breathing or mechanically ventilated. Vet Med-Czech 66, 287–291.

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The objective of this prospective randomised clinical study was to determine the differences in the tracheal, oesophageal and rectal temperature in spontaneously breathing or mechanically ventilated dogs. A total of thirty dogs were allocated to the SPO-group breathing spontaneously (n = 15) or the MEC-group ventilated mechanically (n = 15). Anaesthesia was established using a medetomidine-butorphanol-propofol-isoflurane combination. The tracheal (T-Tra), oesophageal (T-Oes), rectal (T-Rec), inspired gas (T-Gas), room (T-Room) temperatures, respiratory frequency (fR), heart rate (HR), mean arterial pressure (MAP) and end-tidal carbon dioxide concentration (ETCO2) were measured after connecting to a re-breathing system (baseline) and subsequently in 10-minute intervals for 60 minutes. The data were analysed using ANOVA and Steel-Dwass tests (P < 0.05). In the SPO-group, the T-Tra, was significantly lower at T30, T40, T50, T60, the T-Oes and T-Rec at T40, T50, T60, compared to the baseline. In the MEC-group, the T-Tra and T-Oes was significantly lower at T30, T40, T50, T60, the T-Rec at T40, T50, T60, compared to the baseline. In the SPO-group, the fR was significantly lower for all the times and the ETCO2 higher at T10, T20, T30, T40, T50 compared to the MEC-group. No other differences were detected. During anaesthesia, there is a comparable decrease in body temperatures, regardless of whether the dogs are breathing spontaneously or ventilated mechanically.

Armstrong SR, Roberts BK, Aronsohn M. Perioperative hypothermia. J Vet Emerg Crit Car. 2005 Mar 10;15(1):32-7.
Brandt S, Oguz R, Huttner H, Waglechner G, Chiari A, Greif R, Kurz A, Kimberger O. Resistive-polymer versus forced-air warming: Comparable efficacy in orthopedic patients. Anesth Analg. 2010 Mar 1;110(3):834-8.
Grimm KA. Perioperative thermoregulation and heat balance. In: Grimm KA, Lamont LA, Tranquilli WJ, Greene SA, Robertson SA, editors. Veterinary anesthesia and analgesia. The fifth edition of Lumb and Jones. 5th ed. Ames, USA: Wiley Blackwell; 2015. p. 372-9.
Hayes JK, Collette DJ, Peters JL, Smith KW. Monitoring body-core temperature from the trachea: Comparison between pulmonary artery, tympanic, esophageal, and rectal temperatures. J Clin Monit. 1996 May;12(3):261-9.
Hofmeister EH, Brainard BM, Braun C, Figueiredo JP. Effect of a heat and moisture exchanger on heat loss in isoflurane-anesthetized dogs undergoing single-limb orthopedic procedures. J Am Vet Med Assoc. 2011 Dec 15;239(12):1561-5.
Murrell JC, Hellebrekers LJ. Medetomidine and dexmedetomidine: A review of cardiovascular effects and antinociceptive properties in the dog. Vet Anaesth Analg. 2005 May;32(3):117-27.
Redondo JI, Suesta P, Serra I, Soler C, Soler G, Gil L, Gomez-Villamandos RJ. Retrospective study of the prevalence of postanaesthetic hypothermia in dogs. Vet Rec. 2012 Oct 13;171(15): [5].
Schauvliege S. Patient monitoring and monitoring equipment. In: Duke-Novakovski T, de Vries M, Seymour CH, editors. BSAVA manual of canine and feline anaesthesia and analgesia. 3rd ed. Quedgeley, Gloucester, UK: BSAVA; 2016. p. 77-96.
Sinclair MD. A review of the physiological effects of alpha2-agonists related to the clinical use of medetomidine in small animal practice. Can Vet J. 2003 Nov;44(11):885-97.
Solway J. Airway heat and water fluxes and the tracheobronchial circulation. Eur Respir J Suppl. 1990 Dec;3(Suppl 12):608-17.
Stepaniuk K, Brock N. Hypothermia and thermoregulation during anesthesia for the dental and oral surgery patient. J Vet Dent. 2008 Dec;25(4):279-83. Erratum in: J Vet Dent. 2009 Spring;26(1):8.
Yuksek A, Baki ED, Saritaa TB, Sivaci R. A comparison of the effects of lung protective ventilation and conventional ventilation on thermoregulation during anaesthesia. Turk J Anaesthesiol Reanim. 2019 Jun;47(3):173-8.
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