Takao Kato

Publications (2)0 Total impact

• Article: The utility of bispectral index monitoring for sedated patients treated with low-dose remifentanil.

  Takao Kato, Toshiya Koitabashi, Takashi Ouchi, Ryohei Serita
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  ABSTRACT: The aim of the present study was to determine the effect of low-dose remifentanil on the monitoring quality of the Bispectral index for mechanically ventilated patients. Twelve patients who underwent elective surgery and required mechanical ventilation post-operatively were enrolled in this study with written informed consent. Eligible patients were divided into two groups. Patients in the remifentanil group received low-dose remifentanil (0.05-0.125 μg/kg/min) and propofol (1-3 mg/kg/h). Patients in the control group received propofol (1-3 mg/kg/h). Levels of sedation were evaluated by both the Richmond Agitation Sedation Scale (RASS) and BIS monitor (A2000-XP, version 4.0, Aspect Medical Systems, Newton, USA). Monitoring quality was assessed by a correlation between RASS and BIS values. These values were assessed by single regression analysis and a P value of <0.05 was considered significant. There was a significant correlation between RASS and BIS values (P = 3 × 10(-12), R (2) = 0.67) in the remifentanil group, but not in the control group (P = 0.50, R (2) = 0.057). The administration of low-dose remifentanil makes BIS a more precise tool for sedated patients under mechanical ventilation in the ICU.
  International Journal of Clinical Monitoring and Computing 07/2012;
• Article: [Patient whose surgery was postponed due to complete atrioventricular block on arrival at operating theater].

  Azusa Kato, Toshiya Koitabashi, Takao Kato, Hideharu Agata, Takashi Ouchi, Ryohei Serita
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  ABSTRACT: An 86-year-old woman with low cardiac function was scheduled to undergo hip fracture surgery. Preoperative electrocardiogram showed complete left bundle brunch block, first degree atrioventricular block, left axis deviation and bigeminy. However, her electrocardiogram had changed to complete atrioventricular block on arrival at operating theater. ACC/AHA guideline on perioperative cardiovascular evaluation and care for non cardiac surgery indicates the assessment of both the urgency of the surgery and cardiac complications. Because complete atrioventricular block is classified to "active cardiac conditions", we decided to postpone the surgery for more detailed evaluation and treatment of cardiac conditions. In spite of the discontinuation of digoxin and carvegilol, complete atrioventricular block continued for a week, and the permanent pacemaker was inserted. The surgery was performed 2 weeks following the insertion of the pacemaker without any problems under combined general and lumbar epidural anesthesia.
  Masui. The Japanese journal of anesthesiology 06/2011; 60(6):706-9.