Publications by authors named "T Hirahata"

The standard method for qualitatively evaluating the dynamic response is to see if the gain of the amplitude spectrum curve approaches 1 (input signal = output signal) over the frequency band of the blood pressure waveform. In a previous report, Watanabe reported that Gardner's natural frequency and damping coefficient, which are widely used as evaluation methods, do not reflect the dynamic response of the circuit. Therefore, new parameters for evaluating the dynamic response of pressure monitoring circuits were desired.

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Study Objective: It remains unclear whether it is the hypotension prediction index itself or goal-directed haemodynamic therapy that mitigates intraoperative hypotension.

Design: A single centre randomised controlled trial.

Setting: Sapporo Medical University Hospital.

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Article Synopsis
  • The study compares the performance of the i-gel Plus and standard i-gel for fiberoptic tracheal intubation (FOI) in Thiel-embalmed cadavers, with 22 anesthesiologists participating as operators.
  • Results showed that the i-gel Plus allowed for a significantly shorter time to achieve FOI (30.3 seconds) compared to the standard i-gel (54.7 seconds).
  • Additionally, the i-gel Plus had a lower difficulty rating on the visual analog scale and required less upward angle of the fiberscope to visualize the vocal cords effectively.
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  • The study investigated early predictive parameters for maximum amplitude in the kaolin with heparinase assay (HKH) during cardiovascular surgeries involving cardiopulmonary bypass (CPB).
  • Data from 23 patients were analyzed, revealing strong correlations between the parameters K and angle with maximum amplitude, indicating their potential utility in predicting coagulation outcomes.
  • The findings highlight that K and angle, along with maximum amplitude, can provide valuable insights for making quick decisions about coagulation management in surgical settings.
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Genomic instability is considered a fundamental factor involved in any neoplastic disease. Consequently, the genetically unstable cells contribute to intratumoral genetic heterogeneity and phenotypic diversity of cancer. These genetic alterations can be detected by several diagnostic techniques of molecular biology and the detection of alteration in genomic integrity may serve as reliable genetic molecular markers for the early detection of cancer or cancer-related abnormal changes in the body cells.

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