Masui. The Japanese journal of anesthesiology
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We described how modern neuroscience has elucidated what is sleep and its implication, and also reviewed histological and current trends in search of sleep mechanism from view of neurocirculatory or hormonary basis studies. We conclude that anesthesia and sleep share some neuronal structure in their action and mechanism of anesthesia could be elucidated through sleep study. In addition, anesthesia-related sleep disturbance must be settled to serve satisfied quality of life of patients and to save economic and medical resources.
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Obstetric anesthesia has made significant progress over the last 50 years. It is one of the major subspecialties in anesthesia in US. Society for Obstetric Anesthesia and Perinatology (SOAP) was founded in 1968. ⋯ It is encouraging, however, that the number of attendants in obstetric anesthesia sessions in JSA seems increasing. SOAP has played an important role in the education and progress of obstetric anesthesia in US. I hope that the joint symposium of SOAP, Bunben to Masui Kenkyukai, and JSA at 39th SOAP annual meeting will facilitate the progress of obstetric anesthesia in Japan.
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Case Reports
[Electromyographic activity increases the bispectral index up to 98 during anesthesia].
We report the patients who developed sudden unpredicted increases of bispectral index (BIS) value during sevoflurane and fentanyl anesthesia. After the epidural catheter placement, anesthesia was induced with propofol and fentanyl, and muscular relaxation was obtained by vecuronium for tracheal intubation. Anesthesia was maintained with 1-1.5% sevoflurane, intermittent administration of fentanyl and epidural infusion of ropivacaine. ⋯ At first, the BIS was decreased with small dose of supplemental anesthetics, but finally, it was up to 98 and the depth of anesthesia could not be assessed by BIS value. Because slight shivering was found in the patient immediately after emergence, electromyographic activity might have falsely elevated the BIS excessively. No clear recall or explicit memory during operation was observed after anesthesia, but anesthesiologists might better pay much more attentions to unpredictable changes of anesthetic depth during anesthesia.
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We report resistance to vecuronium bromide (Vb) induced muscle relaxation for general anesthesia in a patient with chronic renal failure (CRF) and secondary hyperparathyroidism (HPT). An 81-year-old man (body weight : 52 kg) diagnosed with bladder carcinoma was scheduled for a total cystectomy. In the operating room, standard monitors were applied except for a nerve stimulator. ⋯ The surgery was concluded uneventfully. Although the total amount of Vb administration was 14 mg in 3 hr anesthesia time, he was awake rapidly and extubated sooner than expected. We suspect that resistance to Vb has been caused in part by secondary HPT and it appears necessary to take care when administering Vb in CRF patients with secondary HPT, especially at the induction of general anesthesia.
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We experienced differential lung ventilation using laryngeal mask airway (LMA) and a bronchial blocker tube for a patient with unanticipated difficult intubation. A 27-year-old man was diagnosed as the left spontaneous pneumothorax and scheduled for bulla excision with video-assisted thoracic surgery. Because of failure in tracheal intubation of the usual double lumen tube, we inserted LMAProseal #4 and accomplished differential lung ventilation using a bronchial blocker tube through LMA. This method will be effective in differential lung ventilation of the patient with difficult airway.