Deep Body Temperature Monitoring in Cardiac Surgery

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  • Tsuji Takayuki
    Tokyo Women's Medical College Hospital
  • SUMA Kozo
    Tokyo Women's Medical College Hospital
  • TOGAWA Tatsuo
    Institute for Medical and Dental Engineering, Tokyo Medical and Dental University
  • NEMOTO Tetsu
    Institute for Medical and Dental Engineering, Tokyo Medical and Dental University

Bibliographic Information

Other Title
  • 深部体温計と心臓外科
  • シンブ タイオンケイ ト シンゾウ ゲカ

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Description

Monitoring of core temperatures of the body is informative especially in cardiac surgery. Deep body temperatures (DBTs) during and after operation were studied in over 80 patients. Improved deep body thermistors were attached to the patient's forehead (F), chestwall (C), palm (P) and heel (H). DBTs of each sector were indicated by continuous recordings and digital displays. Central deep body temperatures (CDBTs) of F and C were found to keep steady but peripheral ones (PDBTs) of P and H were labile. CDBTs are usually higher than PDBTs. F-DBT is the highest and distinctive from others. During cardiopulmonary bypass (CPB), F-DBT showed the quickest responses to warming and cooling. After CPB, PDBTs promptly rose close to the level of CDBTs.All DBTs gradually, converged into narrow range and continued to rise up to 38-39°C.<BR>Early dissociation between CDBTs and PDBTs is the alarming sign of postop. hemodynamic crisis. There is no circulatory failure if CDBTs and PDBTs remain within narrow ranges in spite of low blood pressure.<BR>DBTs seem to reflect the blood flow in the core of the monitoring site. Continuous monitoring of DBTs is effective in early detection of hemodynamic disturbances.

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