The Tokai journal of experimental and clinical medicine
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Tokai J. Exp. Clin. Med. · Dec 2010
The efficacy of an oxygen mask with reservoir bag in patients with respiratory failure.
Oxygen masks with reservoir bags (OMR) are widely used for oxygen therapy in patients with severe respiratory failure. The purpose of the present study was to determine whether OMRs are effectively used in clinical practice. ⋯ Fixing an OMR very tightly to the face is mandatory for its effective use. It should also be kept in mind that there are limitations to the efficacy of OMR, even when they are used with such careful management.
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Tokai J. Exp. Clin. Med. · Dec 2010
Case ReportsA case of juvenile primary pulmonary malignant fibrous histiocytoma.
An 18-year-old female presented with an abnormal shadow of a 22-mm nodule in the left anterior segment of the upper lung lobe (S3) on chest X-ray and computed tomography (CT). Thoracoscopic partial lobectomy was performed, when a frozen section suggested spindle cell sarcoma of extrapulmonary origin, including malignant fibrous histiocytoma (MFH). ⋯ Primary pulmonary MFH is usually treated by total resection, however, in the current case we performed a partial lobectomy with clear margins and a watchful follow-up without any additional aggressive treatment. No relapse has been observed for 3 years after the surgery.
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Tokai J. Exp. Clin. Med. · Sep 2010
A questionnaire survey on operability of syringe pumps for prefilled syringes.
Some types of syringe pumps currently available for use of prefilled syringes (PFS) require setting for syringe size which varies from manufacturer to manufacturer. We conducted a questionnaire survey for 10 nurses at the emergency critical care center of this hospital on the operating procedures of two different types of syringe pump (i.e., from turning on the power to PFS setting, PFS mounting, flow rate setting, and start of drug infusion), in terms of (1) manipulation time, (2) accuracy of task performance, and (3) operability. The syringe pumps used were: type A, TE-331S0N (Terumo Corporation), and type B, CSP-100S (Daiken Medical Co., Ltd.). ⋯ As for accuracy of task performance, 90% of nurses performed manipulations accurately with type A; whereas with type B, 90% of nurses were close to failing or actually failed to follow the procedures appropriately, and only 10% followed accurately. Thus, type A proved superior in 4 of the 5 points of issue except "easy to set flow rate". In conclusion, the results indicate the importance of standardizing the syringe size and other specifications through the cooperation of pharmaceutical companies and medical device manufacturers to cope with the future spread of PFS.
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Tokai J. Exp. Clin. Med. · Apr 2010
Suprathreshold 0.2 Hz repetitive transcranial magnetic stimulation (rTMS) over the prefrontal area.
This study was designed to evaluate the effects of suprathreshold 0.2 Hz repetitive transcranial magnetic stimulation (rTMS) to the prefrontal area and motor cortex on the cerebral cortex excitability. ⋯ These results suggest that suprathreshold 0.2 Hz rTMS of Fz induces a significant suppression of excitability in the primary motor cortex.
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Tokai J. Exp. Clin. Med. · Jul 2009
An in vitro method to measure permeability of gases through a cuff membrane of tracheal tube in conditions relevant to its clinical uses.
The cuff pressure on a tracheal tube while being used in a clinical setting is affected by various physiological conditions. Hence, it is difficult to accurately assess the tracheal tube cuff membrane permeability for gases. We developed an experimental system that enabled accurate assessment of the transition and permeability of gases through a cuff membrane. ⋯ As a result, the study condition of Experiment II (the cuff was inflated with a gas mixture of 50% nitrous oxide and 50% oxygen) was the most appropriate in which the intracuff was inflated with the same gas mixure because of no concentration gradient between intra- and extra-cuff space. In the schematic diagram of the intracuff pressure changes during anesthesia with nitrous oxide, because of concentration gradient of the gas mixture, gases flow from pulmonary side into the cuff and in the latter phase gases pass through the cuff membrane. Our in vitro experimental system was revealed to be useful in accurately assessing the gas permeability through the cuff membrane of a tracheal tube in conditions relevant to clinical uses.