The electrolysis by the use of direct current induces tissue necrosis around both electrodes.The tissue around the positive electrode becomes severely acidotic, the pH of which reaches 2 to 3,while, the negative electrodes produces marked alkalosis in the tissues.Experimental studies on mongrel dogs demonstrated the acute tissue necrosis of 0.1〜1.5cm in diameter, when 20 mA was employed for 60 minutes. Tissue impedance was approximately 500 ohms.As electrode materials, 90% platinum with 10% iridium was used. The diameter of platinum needle was 0.65mm. This approach was carried out in patients with skin or lymphnode malignant metastases. Electrodes were stitched into skin metastatic lesions or into metastatic lymphnodes. The use of direct current of 20 mA changed these lesions into dark gray tissue in colour. Histological examinations revealed neoplasma ghost findings without any malignancy.In ten clinical cases, two cases demonstrated CR, four cases were PR, 2 cases were NC and the rest was PD.Authors conclude this kind of treatment is promissing for the therapy of malignant neoplasma in the near future.
Cotton surgical gowns are used at many operating rooms. However, it is argued that the quality of cotton is critical for the emission of airborne particles and the bacterial permeability.We have studied the airborne particles and bacteria refered to the washing and sterilizing cycles up to 20 times. The results obtained are summarized as follows.1. The airborne particles increased according to the cycle up to 10 times and reached a plateau level after that.2. The number of bacteria dispersed from cotton surgical gowns was correlated with the number of airborne bacteria of scrub attires (r=0.893,p<0.01). Also, that was correlated with the relative humidity and temperature of the operating room (r=0.791,p<0.01).3. Redudction rate of the airborne bacteria from cotton gowns increased depending on the number of the washing and sterilizing cycles up to 15 times and then reached a plateau level thereafter.4. The number of bacteria adhered on gown surface was decreased by the washing and sterilizing cycles.
Airbone particles and airbone bacteria were checked and the number of organisms on the surface of the floor and wall in the operating room were counted every year for the eight years since the openning.Numbers of airbone particle and airbone bacteria for the latter half of the eight years were fewer than those for the first half of the period, because of additional several counterplans to maintain the iperating envitonment to be clean. Number of bacteria on the surface of floor in the operating room showed the same tendency.Necessity of environmental assessment in the operating room and permitted grade of contamination of the operating room were disscussed.