Marja-Tellervo Mäkinen1, Anne Pesonen2, Irma Jousela2, Janne Päivärinta2, Satu Poikajärvi2, Anders Albäck3, Ulla-Stina Salminen4, Eero Pesonen2. 1. Division of Anaesthesiology, Department of Anaesthesiology, Intensive Care and Pain Medicine. Electronic address: makinentelle@gmail.com. 2. Division of Anaesthesiology, Department of Anaesthesiology, Intensive Care and Pain Medicine. 3. Abdominal Center, Department of Vascular Surgery, Meilahti Hospital, Helsinki, Finland. 4. Heart and Lung Center, Department of Cardiac Surgery, University of Helsinki and Helsinki University Hospital, Helsinki, Finland.
Abstract
OBJECTIVE: The aim of this study was to compare deep body temperature obtained using a novel noninvasive continuous zero-heat-flux temperature measurement system with core temperatures obtained using conventional methods. DESIGN: A prospective, observational study. SETTING: Operating room of a university hospital. PARTICIPANTS: The study comprised 15 patients undergoing vascular surgery of the lower extremities and 15 patients undergoing cardiac surgery with cardiopulmonary bypass. INTERVENTIONS: Zero-heat-flux thermometry on the forehead and standard core temperature measurements. MEASUREMENTS AND MAIN RESULTS: Body temperature was measured using a new thermometry system (SpotOn; 3M, St. Paul, MN) on the forehead and with conventional methods in the esophagus during vascular surgery (n = 15), and in the nasopharynx and pulmonary artery during cardiac surgery (n = 15). The agreement between SpotOn and the conventional methods was assessed using the Bland-Altman random-effects approach for repeated measures. The mean difference between SpotOn and the esophageal temperature during vascular surgery was+0.08°C (95% limit of agreement -0.25 to+0.40°C). During cardiac surgery, during off CPB, the mean difference between SpotOn and the pulmonary arterial temperature was -0.05°C (95% limits of agreement -0.56 to+0.47°C). Throughout cardiac surgery (on and off CPB), the mean difference between SpotOn and the nasopharyngeal temperature was -0.12°C (95% limits of agreement -0.94 to+0.71°C). Poor agreement between the SpotOn and nasopharyngeal temperatures was detected in hypothermia below approximately 32°C. CONCLUSIONS: According to this preliminary study, the deep body temperature measured using the zero-heat-flux system was in good agreement with standard core temperatures during lower extremity vascular and cardiac surgery. However, agreement was questionable during hypothermia below 32°C.
OBJECTIVE: The aim of this study was to compare deep body temperature obtained using a novel noninvasive continuous zero-heat-flux temperature measurement system with core temperatures obtained using conventional methods. DESIGN: A prospective, observational study. SETTING: Operating room of a university hospital. PARTICIPANTS: The study comprised 15 patients undergoing vascular surgery of the lower extremities and 15 patients undergoing cardiac surgery with cardiopulmonary bypass. INTERVENTIONS: Zero-heat-flux thermometry on the forehead and standard core temperature measurements. MEASUREMENTS AND MAIN RESULTS: Body temperature was measured using a new thermometry system (SpotOn; 3M, St. Paul, MN) on the forehead and with conventional methods in the esophagus during vascular surgery (n = 15), and in the nasopharynx and pulmonary artery during cardiac surgery (n = 15). The agreement between SpotOn and the conventional methods was assessed using the Bland-Altman random-effects approach for repeated measures. The mean difference between SpotOn and the esophageal temperature during vascular surgery was+0.08°C (95% limit of agreement -0.25 to+0.40°C). During cardiac surgery, during off CPB, the mean difference between SpotOn and the pulmonary arterial temperature was -0.05°C (95% limits of agreement -0.56 to+0.47°C). Throughout cardiac surgery (on and off CPB), the mean difference between SpotOn and the nasopharyngeal temperature was -0.12°C (95% limits of agreement -0.94 to+0.71°C). Poor agreement between the SpotOn and nasopharyngeal temperatures was detected in hypothermia below approximately 32°C. CONCLUSIONS: According to this preliminary study, the deep body temperature measured using the zero-heat-flux system was in good agreement with standard core temperatures during lower extremity vascular and cardiac surgery. However, agreement was questionable during hypothermia below 32°C.
Authors: Eero Pesonen; Marja Silvasti-Lundell; Tomi T Niemi; Riku Kivisaari; Juha Hernesniemi; Marja-Tellervo Mäkinen Journal: J Clin Monit Comput Date: 2019-02-15 Impact factor: 2.502
Authors: James M Jack; Helen Ellicott; Christopher I Jones; Stephen A Bremner; Ian Densham; C Mark Harper Journal: J Clin Monit Comput Date: 2019-01-08 Impact factor: 2.502
Authors: Alexander C Stahn; Andreas Werner; Oliver Opatz; Martina A Maggioni; Mathias Steinach; Victoria Weller von Ahlefeld; Alan Moore; Brian E Crucian; Scott M Smith; Sara R Zwart; Thomas Schlabs; Stefan Mendt; Tobias Trippel; Eberhard Koralewski; Jochim Koch; Alexander Choukèr; Günther Reitz; Peng Shang; Lothar Röcker; Karl A Kirsch; Hanns-Christian Gunga Journal: Sci Rep Date: 2017-11-23 Impact factor: 4.379