caa a22 4500 465825907 CHVBK 20180323112149.0 cr unu---uuuuu 170327e19901001xx s 000 0 eng 10.1007/BF02842485 doi (NATIONALLICENCE)springer-10.1007/BF02842485 Placement of esophageal stethoscope by acoustic criteria does not consistently yield an optimal location for the monitoring of core temperature [Elektronische Daten] [Peter Freund, George Brengelmann] The esophageal stethoscope has evolved into a device for both acoustic and core temperature monitoring. To test whether routine placement according to acoustic criteria results in placement of the core temperature sensor in the region of contiguity between the esophagus and the heart, we determined the depth of placement electrocardiographically. All patients were undergoing nonthoracic elective operations requiring general anesthesia and tracheal intubation. First, we established that different observers selected the same esophageal depth within ±1 cm electrocardiographically, using the criterion of a symmetric biphasic P wave of maximal amplitude (7 patients). Then, in 30 more patients, we compared routine acoustic placements with the depths of the maximalamplitude biphasic P wave. Stethoscopes placed according to acoustic criteria were within ±3 cm of P-wave depths in 15 of 30 patients. In the remaining patients, measured discrepancies ranged up to 13.5 cm. We conclude that the prevailing stethoscope design, with a thermistor at the tip, below the acoustic window, does not ensure placement of the thermistor within the optimal region for monitoring of core temperature. A modification in design that would take advantage of the reliability of electrocardiographic positioning is suggested. Little, Brown and Company, 1990 Monitoring: temperature nationallicence Equipment: stethoscope, esophageal nationallicence Freund Peter Departments of Anesthesiology and Physiology and Biophysics, University of Washington, and Anesthesiology Service, Veterans Administration Medical Center, Seattle, WA aut Brengelmann George Departments of Anesthesiology and Physiology and Biophysics, University of Washington, and Anesthesiology Service, Veterans Administration Medical Center, Seattle, WA aut Journal of Clinical Monitoring Springer Netherlands 6/4(1990-10-01), 266-270 0748-1977 6:4<266 1990 6 10877 https://doi.org/10.1007/BF02842485 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02842485 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Freund Peter Departments of Anesthesiology and Physiology and Biophysics, University of Washington, and Anesthesiology Service, Veterans Administration Medical Center, Seattle, WA aut NATIONALLICENCE 700 1- Brengelmann George Departments of Anesthesiology and Physiology and Biophysics, University of Washington, and Anesthesiology Service, Veterans Administration Medical Center, Seattle, WA aut NATIONALLICENCE 773 0- Journal of Clinical Monitoring Springer Netherlands 6/4(1990-10-01), 266-270 0748-1977 6:4<266 1990 6 10877 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer