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Biomedical subjects

O Katoh

Publications and source records attributed to O Katoh.

At least 127 records · Page 7Linked to original sources
PubMed1987

Intrabronchial leiomyoma treated by localized resection via bronchotomy and bronchoplasty.

There have been no reports of intrabronchial leiomyomas treated by bronchotomy and bronchoplasty. Most intrabronchial leiomyomas have been treated by lobectomy or pneumonectomy because of their chronic infection or advanced parenchymal destruction. A leiomyoma of the left upper bronchus was diagnosed correctly by bronchoscopic biopsy, and successfully removed by localized resection via a bronchotomy and bronchoplasty. The site of excision was totally normal more than two years later. This conservative surgical procedure of an intrabronchial leiomyoma was useful for sparing lung parenchyma.

Bronchial Neoplasms↗
PubMed1987

Bronchoscopic and angiographic comparison of bronchial arterial lesions in patients with hemoptysis.

In seven patients with nonmalignant disease, we bronchoscopically observed various types of bronchial arterial lesions that may have caused hemorrhage. Five of the seven showed a bulging lesion, and the other two demonstrated an intrabronchial mass. We also examined these seven patients using selective bronchial arteriography. Herein we report our comparative study of the bronchoscopic findings and the bronchial arteriograms of these bronchial arterial lesions. The bulge observed in bronchoscopy corresponded either to an aneurysm or to a hypervascular area in the bronchial arteriogram. The mass lesions corresponded to a hypervascular area or a focal dilatation in the bronchial arteriogram. The intrabronchial lesions observed bronchoscopically either disappeared or were significantly diminished by bronchial arterial embolization for management of the hemorrhage. A histologic examination in two patients who underwent surgery revealed vascular lesions corresponding to the intrabronchial lesions in bronchoscopy. The results of this comparative study have important application in the bronchoscopic examination of bronchial arterial lesions in patients with hemoptysis.

Adult↗
PubMed1987

[Clinical studies on flomoxef in respiratory tract infections].

Flomoxef (FMOX, 6315-S) is a new oxacephem with a broad spectrum of antimicrobial activity. We used FMOX for treatment of 13 patients with respiratory tract infections including 4 cases of pneumonia, 5 of lung abscess and 4 of exacerbation of the chronic airway diseases. FMOX showed excellent in vitro antimicrobial activities against clinical isolates including 4 strains of Streptococcus pneumoniae, 2 strains of Haemophilus influenzae and each one strain of Escherichia coli and Klebsiella pneumoniae. Clinical responses were excellent in 3 cases, good in 7 and fair or poor in 3. No side effect was observed, but abnormal laboratory findings caused by FMOX administration were found in 2 cases; hypertransaminasemia and eosinophilia. However, neither of them was severe. From the above results, it is considered that FMOX will be useful for treatment of patients with respiratory tract infections.

Adult↗
PubMed1986

Pathogenesis of impending myocardial infarction and acute myocardial infarction: clinical and angiographic evaluation of coronary thrombosis as a precipitating factor.

In order to investigate the role of coronary thrombosis as a precipitating factor of acute myocardial infarction (AMI), we examined coronary angiographic findings in 89 patients with AMI taken within 24 hours of the onset and in 42 patients with prolonged angina attack of impending myocardial infarction (impending MI) taken within 50 hours of the last angina attack. Furthermore, in the patients with impending MI, the effects of intracoronary and intravenous thrombolytic therapy and anticoagulant therapy used to prevent impending MI from developing into AMI, were also studied. (1) In 72 of 89 patients (81%) with AMI, coronary thrombi were detected angiographically. The thrombi were detected most frequently (88%) in angiographs taken within 3 hours of onset. (2) In 23 of 42 patients with impending MI, coronary thrombi were detected angiographically. In 6 patients with coronary thrombi who underwent intracoronary thrombolysis during angina attack, occlusive coronary thrombi in ischemia-related vessels were the observed, and recanalization by thrombolysis with intracoronary urokinase infusion relieved chest pain and improved ECG changes. (3) The incidence of AMI in 42 patients with impending MI who were treated with intracoronary and intravenous thrombolytic therapy and anticoagulant therapy was significantly less than in the conventional therapy group (80 patients) (11.9% vs. 27.5%; p less than 0.05). In 4 of 5 patients with developing AMI, coronary thrombi were detected angiographically in the acute phase of impending MI. These results indicate that coronary thrombosis plays an important role not only in the precipitation of impending MI but also in the development of impending MI to AMI.

Angina Pectoris↗
PubMed1984

Effects of sublingual isosorbide dinitrate on left ventricular performance during exercise in patients with myocardial infarction.

In order to investigate left ventricular performance during exercise in patients with myocardial infarction and evaluate the effects of sublingual isosorbide dinitrate (ISDN) on left ventricular performance, we performed a symptom-limited multigraded exercise test using a bicycle ergometer in supine position. Thirty-seven patients with myocardial infarction were evaluated in order to clarify the hemodynamic responses to exercise with and without sublingual ISDN. Patients were subdivided into 3 groups according to the level of pulmonary capillary pressure (PCP) and cardiac index (CI) at peak exercise as follows: Group I (14 patients); PCP less than 18 mmHg, CI greater than or equal to 5.0 or CI less than 5.0 L/min/m2, Group II (11 patients); PCP greater than or equal to 18 mmHg, CI greater than or equal to 5.0 L/min/m2, Group III (12 patients); PCP greater than or equal to 18 mmHg, CI less than 5.0 L/min/m2. Exercise capacity without ISDN (control study) was correlated with left ventricular performance during exercise. Although left ventricular performance in patients who complained of dyspnea or chest pain at peak exercise was worse than those who complained of leg fatigue, we could not predict hemodynamics during exercise from the level of hemodynamic parameters at rest in each patient. Determinant factors of left ventricular performance during exercise were age, previous history of myocardial infarction, the severity of coronary artery lesion and the extent of left ventricular wall motion abnormality which was estimated by left ventriculogram as an index of infarct size. After sublingual ISDN (ISDN study), exercise capacity was improved. No patient terminated exercise because of chest pain and only one did because of dyspnea.(ABSTRACT TRUNCATED AT 250 WORDS)

Adult↗
PubMed1983

[A case of paraganglioma of the urinary bladder].

A very rare case of paraganglioma of the bladder is reported. The patient was a 51-year-old man. He was admitted to our hospital on June 18th, 1981, with the complaint of gross hematuria. He had no attack of hypertension and we could not find in him any parasympathetic symptom except hematuria. Upon urological examination, he was suspected to have stage B cancer of bladder. He received partial cystectomy with uneventful course during the operation on June 30th, 1981 and was discharged on the 15th postoperative day. The postoperative histological diagnosis was paraganglioma of the urinary bladder. He was confirmed to have normal levels of catecholamine and its metabolites in the urine after 4 months postoperatively. At present, he is asymptomatic.

Catecholamines↗