J.Jpn. Surg. Soc.. 56(1): 93-110, 1955
STUDIES ON THE PULMONARY CIRCULATION IN THE SURGICAL FIELD
Part 2 : A CLINICAL STUDY ON THE PULMONARY CIRCULATION OF THE SURGICAL PULMONARY DISEASE BEFORE AND AFTER OPERATION: CONCERNING THE LOW OXYGEN BREATHING TEST
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2nd Surgical Department, Tokyo University (Director: Prof. S. KIMOTO) Yusaku ANAZAWA |
1. Normal values of the pulmonary circulation have been investigated. It was noted that the pulmonary arterial blood pressure higher than 17 mmHg was pathologic. Normal mean value of pulmonary blood flow was 5.12 litres per minute. 10% oxygen breathing resulted in the rise of pulmonary arterial blood pressure, decrease of pulmonary blood flow and increase of pulmonary vascular resistance.
2. Almost all the values in the patient of pulmonary tuberculosis for pulmonary resetcion were within normal limit, however, pulmonary vascular resistance was slightly raised, effective pulmonary blood flow was decreased. By low oxygen breathing the rise in pulmonary arterial blood pressure and the increase of pulmonary blood flow were observed.
3. At the 10th post-operative day, the patient of pulmonary tuberculosis undergone segmental pulmonary resection and lobectomy showed a slight pulmonary hypertention and hypoxia. Especially when the lung was not suffciently re-expanded, remarkable circulatory disturbances was recognized.
By low oxygen breathing, pulmonary hypertension was augmented and pulmonray blood flow was reduced.
4. The patients of lung cancer, gangren and bronchiectasia showed raised pulmonary arterial blood pressure, increased pulmonary blood flow and increased pulmonary vascular resistance. There were many cases that were noted remarkable pulmonary disturbance on accout of hypoxia. These changes of pulmonary circulaton was augmented by the low oxygen breathing test.
5. As a effect of pulmonary resection in these patients, the improvement of pulmonary circulatory disturbance has been noted. However, it was shown that low oxygen breathing interfered the pulmonary circulation markedly. That is, reserved power of pulmonary circulation reduced in these cases.
(author's abstact)
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