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Biomedical subjects

E Hata

Publications and source records attributed to E Hata.

52 records · Page 3Linked to original sources
PubMed1989

[Preoperative evaluation of digital subtraction pulmonary angiography in primary lung cancer].

The preoperative evaluation of the resectability for primary lung cancer was studied by using digital subtraction pulmonary angiography (DSA-PAG). Thirty operative cases with primary lung cancer performed DSA-PAG as preoperative test at random for 3 years from June 1985 were subjected in this study. The apparatus used is DSA device (Angiotoron) of a product of Siemens Co., Ltd. The findings obtained by DSA-PAG were retrospectively studied according to the surgical findings, operative modes and postoperative histopathological findings. Moreover, at the same time, usefulness of DSA-PAG was evaluated comparing its findings with preoperative enhanced CT interpretation. The useful findings were obtained in 10 cases of 30 cases (33%). Its contents were 2 cases with invasion of the left atrium, 2 cases with invasion of superior and inferior pulmonary vein, 5 cases with invasion of truncus pulmonary artery and 1 case with interlobar invasion. The findings in all cases were superior to those obtained by the enhanced CT. The decision of operative modes confirming invasion of tumor or metastatic lymph node is one of the important aims of the preoperative test. DSA-PAG can be carried out simply and safely on out-patient basis, additionally, favorable result can be especially obtained in invasion lesions of blood vessels of hilus regions. From the result, informations of regions unknown by preoperative CT were accurately obtained. As a rule, DSA-PAG should be performed by the preoperative routine test of primary lung cancer.

Adenocarcinoma↗
PubMed1989

[Surgical treatment of a case of multiple lung cysts infected with aspergillosis].

An 18-year-old male case in which multiple lung cysts with Aspergillus infection was diagnosed is reported. The case was recognized during the clinical course of bilateral pneumothorax, and chest X-ray showed cystic shadows in the middle field of the right lung. At first, bullectomy and partial cystectomy of the lung was performed, and Aspergillus fumigatus was cultured from the fluid in the cysts. The cysts were located in the right upper and middle lobe, so upper and middle lobectomy was performed in the second surgical operation. In this case, the check valve mechanism caused by the pneumothorax provided the conditions for Aspergillus infection. In cases of air-fluid levels shown by chest X-ray such as this, Aspergillus infection should be suspected.

Adolescent↗
PubMed1988

Detection of the mediastinal lymph nodes metastasis in lung cancer by endoscopic ultrasonography.

Mediastinal lymph nodes metastasis of lung cancer was analysed by endoscopic ultrasonography in 96 patients in whom histological diagnosis of the lymph nodes could be proven by thoracotomy. A Receiver Operating Characteristic (ROC) curve was drawn up for determining the criteria for metastatic lymph nodes by endoscopic ultrasonography. The ROC curve was evaluated by using four parameters: The long diameter, the short diameter, the long diameter plus the short diameter, and the product of the long diameter times the short diameter. The long plus short diameter and the long-times-short diameter showed the highest detectability of the metastasis of all histological types on the ROC curve. The reasonable criteria levels were found to be 18 mm and 75 mm2 by means of a moderate threshold. In this level, sensitivity were 77%, 76%; specificity 84%, 84%; and accuracy 82%, 82%, respectively. When examinations were done by histological types, the criteria level for the epidermoid carcinoma should be increased to more than that for the adenocarcinoma. And, sensitivity and specificity were better in the epidermoid carcinoma. Thus, these results suggest that endoscopic ultrasonography is clinically useful for the detection of lymph nodes metastasis in lung cancer.

Adenocarcinoma↗
PubMed1978

Reconstruction of the superior vena cava in a patient with a thymoma.

Surgical treatment was attempted in a 71-year-old man who had superior vena caval syndrome caused by incomplete obstruction of the superior vena cava with a thymoma. Using a temporary internal shunt, the superior vena cava was almost entirely resected together with the tumor and reconstructed by autogenous venous grafts. Patency of the reconstructed vein was proved by angiography one year after the operation. He has been asymptomatic for 15 months after surgery.

Aged↗
PubMedDate not supplied

Venous reconstruction using prosthetic grafts.

The effect of antiplatelet drugs on the fate of Teflon grafts placed at the superior vena cava were examined. Eighty adult mongrel dogs received dipyridamole, dipyridamole depot capsule, or cepharanthin after implantation of Teflon grafts to the superior vena cava. The incidence of graft obstruction was significantly decreased, suggesting that intimal hyperplasia was prevented by administration of antiplatelet drugs. Eighteen patients underwent various kinds of venous revascularization, including the superior caval, innominate, pulmonary, and femoral veins. The long-term outcome of prosthetic reconstruction of the superior vena cava was favorable.

Alkaloids↗