Masayuki Oshima

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BACKGROUND The effects of intravenous oxytocics on blood loss and uterine contraction during cesarean section were studied in 136 parturients. METHODS The subjects were randomized to receive either methylergometrine 0.2 mg bolus (MEM group; n = 34), oxytocin 10 IU over 30 seconds (OX 30 s group; n = 34), oxytocin 10 IU over 5 minutes (OX 5 m group; n =(More)
It is well known that pregnancy reduces anesthetic requirements in response to various noxious stimuli. However, there have been no detailed reports concerning functional changes in nerve fibers during pregnancy. Using a Neurometer, a recently available commercial quantitative sensory monitor, we measured current perception threshold (CPT) values for three(More)
Although it has been generally believed that parturients have delayed gastric emptying during anesthesia, the most recent reports suggest that gastric emptying is not delayed during pregnancy except during labor. Electrical slow waves in the stomach determine the frequency and the peristaltic nature of gastric contractions. In this study we performed(More)
During laparoscopic myomectomy, it is difficult to determine the actual blood loss volume because physiological saline is used for lavaging to detect the bleeding point or to ensure no active bleeding site. We attempted to estimate blood loss by measuring the waste irrigation fluid's hemoglobin (Hb) concentration using HemoCue (HemoCue, Angelholm, Sweden).(More)
Aggressive posterior retinopathy of prematurity (ROP) can, if left untreated, rapidly progress to total retinal detachment within 1–2 weeks. Early surgical intervention with vitrectomy has been attempted to treat and prevent further retinal detachment. We investigated the anesthetic management of 29 infants with aggressive posterior ROP undergoing early(More)
It is said that cerebral angiospasm affects very seriously the prognosis of the patient with ruptured aneurysm. Of 44 patients with ruptured aneurysm who died from cerebral ischemia due to cerebral angiospasm, we performed histopathological studies of brains of 18 patients without iatrogenic factors (radical surgical operation, prolonged artificial(More)
BACKGROUND Why pregnant women require smaller doses of anesthetic agents still remains speculative. One hypothesis proposes that pregnancy raises sensory perception thresholds, perhaps through a progesterone-mediated effect. This study was undertaken in order to quantify any changes in sensory perception thresholds after parturition and to correlate these(More)
The effects of intravenous oxytocin on thoracic epidural pressure during cesarean section were studied in 90 parturients (American Society of Anesthesiologists physical atatus class I or II) after obtaining informed consent. The subjects were randomized to either a control (control group; n=30), bolus (bolus group; n=30) or drip treatment group (drip group;(More)
BACKGROUND We experienced a rare malposition of a pulmonary artery catheter due to kinking in a 63-year-old male who was scheduled for an off-pump coronary artery by-pass graft. FINDINGS Given the difficulty to obtain stable pulmonary artery waveform, we discovered that the two waveforms of the distal and proximal ports of the pulmonary artery catheter(More)