Masui. The Japanese journal of anesthesiology
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The segmental spread of thoracic epidural analgesia was measured in 14 patients scheduled for elective surgery with ages ranging from 35 to 80 years. Epidural puncture was performed in the seventh or eighth thoracic intervertebral space using 17 gauge Tuohy needle with the patient in the left lateral position. ⋯ Fifteen minutes after injection of anesthetic, the spinal segments anesthetized were determined by absence of cold sensation. A statistically significant correlation was found between age and a segmental dose (ml.seg-1) (r = -0.72), and between age and a segmental dose corrected by height (ml.seg-1.m-1) (r = -0.65).
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A 64-year-old man was scheduled for transure thral resection of the prostate. The patient's medical history showed borderline diabetic state and two uncomplicated surgeries under spinal anesthesia. Spinal anesthesia was performed at the L 3/4 interspace using hyperbaric 0.24% dibucaine 2.2 ml, which was followed by general anesthesia because the anesthesia level had spread only to the lower left side of the body. ⋯ None of these are contraindication for spinal anesthesia. Many elderly patients particularly undergoing urological surgeries are likely to have such risk factors. Therefore at least dibucaine should be avoided for spinal anesthesia because of its high neurotoxicity compared with other local anesthetics.
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This report contains anesthesia-related mortality and morbidity in Japanese Society of Anesthesiologists Certified Training Hospitals (JSACTH) in the year 2000, as a part of the second series of annual studies started in 1999. JSA Committee on Operating Room Safety (CORS) sent confidential questionnaires to 794 JSACTH and received effective answers from 65.5% of hospitals. A total number of 941,217 anesthetics were documented. ⋯ Drug overdose or wrong choice (2.7%) as a human error occupied the 10th. In conclusion, the obtained incidences as to death, other critical incidents and their outcomes as well as the occurrence of principal causes in 2000 study were remarkably close to those in 1999 study. We expect that this second series of annual studies for five-years should reveal precise and definite direction for us to reduce anesthesia-related mortality and morbidity.
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In the period from April 1995 to March 2000, 11 parturient patients were diagnosed as having HELLP syndrome and underwent Caesarian section at our institution. All of the patients also had eclampsia or preeclampsia. Six of the operations were performed under general anesthesia and 5 were performed under regional anesthesia (one epidural and 4 spinal blocks). ⋯ No major complications occurred during the postoperative periods. Anesthetic management of a parturient patient with HELLP syndrome is modeled on the underlying preeclamptic condition. Determination of the appropriate anesthetic should be based on the patient's condition, condition of the fetus, and the urgency of the situation.
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Randomized Controlled Trial Clinical Trial
[Effect of nitrous oxide on the bispectral index during sevoflurane anesthesia].
We studied the effects of nitrous oxide on the relationship between end-tidal sevoflurane concentration and bispectral index (BIS) in patients undergoing abdominal surgery. Anesthesia was maintained with combination of epidural and sevoflurane anesthesia in air (control group; n = 15) or with 67% nitrous oxide (nitrous oxide group; n = 15). The end-tidal sevoflurane concentration was increased by 0.5% every 15 min to 3% and BIS values were recorded at each step. ⋯ Nitrous oxide with sevoflurane caused more reduction in BIS in comparison with sevoflurane alone. The sevoflurane concentration for BIS at 50 in the nitrous oxide group (0.9 +/- 0.4%) was significantly lower than that in the control group (1.2 +/- 0.4%). The results suggest that the hypnotic effect of sevoflurane was enhanced by the addition of nitrous oxide during abdominal surgery.