{"title":"[A diagram to analyse airways patency abnormalities (author's transl)].","authors":"R Peslin, D Tenenbaum, P Petit, C Marchand","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>The factors contributing to airflow obstruction in chronic respiratory diseases are frequently investigated by measuring an index of airways patency : 1) at various lung volumes, which permits to detect and quantify the obstruction, 2) at different static recoil pressures (Pst) to recognize abnormalities not related to a loss of elastic recoil. A diagram has been developed which facilitates the analysis and permits a more quantitative evaluation of intrinsic and extrinsic factors : the index of airways patency (I) is plotted simultaneously against Pst and against lung volume (expressed in % of predicted TLC), the two abscissae being scaled in such a way that the normal ranges are coincident for the two curves. Then, the distance from the I(Pst) curve to the normal range may be used to estimate the abnormalities due to intrinsic factors, and the distance between the two curves to evaluate extrinsic obstruction. Taking maximum expiratory flows as the index of airways patency, examples are shown to illustrate the use of the diagram.</p>","PeriodicalId":75638,"journal":{"name":"Bulletin de physio-pathologie respiratoire","volume":"11 3","pages":"321-32"},"PeriodicalIF":0.0,"publicationDate":"1975-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12399425","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Proceedings: On-line measurement of extra vascular lung water in man with gamma-emitting tracers.","authors":"P Even, R L Nicolas, P Duroux, F Ruff","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":75638,"journal":{"name":"Bulletin de physio-pathologie respiratoire","volume":"11 2","pages":"135P-136P"},"PeriodicalIF":0.0,"publicationDate":"1975-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12276826","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Proceedings: The presence in conscious man of the vagal CO2 reflex described in dogs.","authors":"D Trenchard","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":75638,"journal":{"name":"Bulletin de physio-pathologie respiratoire","volume":"11 2","pages":"97P-98P"},"PeriodicalIF":0.0,"publicationDate":"1975-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12326855","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Proceedings: Regional lung function in the newborn infant assessed by means of 133Xe.","authors":"G Koch","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":75638,"journal":{"name":"Bulletin de physio-pathologie respiratoire","volume":"11 2","pages":"132P-134P"},"PeriodicalIF":0.0,"publicationDate":"1975-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12326897","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Proceedings: Localization and properties of receptors in the tracheo-bronchial tree.","authors":"G Sant'Ambrogio, G Miserocchi, J Mortola","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":75638,"journal":{"name":"Bulletin de physio-pathologie respiratoire","volume":"11 2","pages":"87P-88P"},"PeriodicalIF":0.0,"publicationDate":"1975-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12335075","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Proceddings: The effect of autotransplantation of one lung on the regulation of respiration in the dog.","authors":"A A Viljanen, S Mattila, B Sjövall","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":75638,"journal":{"name":"Bulletin de physio-pathologie respiratoire","volume":"11 2","pages":"93P-94P"},"PeriodicalIF":0.0,"publicationDate":"1975-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12276822","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A quantitative analysis of oxygen release due to changes in P50 and venous PO2.","authors":"K Rakusan, H Marcinek","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>It is almost impossible to estimate the amount of oxygen released from hemoglobin on the basis of the P50 values without calculation, because of the shape of the oxygen dissociation curve. For this reason, we prepared two tables : one indicating the saturation of hemoglobin with oxygen in the venous blood as influenced by venous Po2 and P50 (Table I) and the other, the oxygen release from the arterial blood as influenced by venous Po2 and P50 (Table II). Both tables are based o- the Hill's equation and normal entry data. Values of P50 vary from 20 to 45 torr, while the range for venous Po2 is 5-50 torr. The discussion on possible use of the tables follows.</p>","PeriodicalId":75638,"journal":{"name":"Bulletin de physio-pathologie respiratoire","volume":"11 2","pages":"269-76"},"PeriodicalIF":0.0,"publicationDate":"1975-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12326902","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Proceedings: Local anaesthesia of the airways.","authors":"B A Cross, A Guz, S K Jain","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":75638,"journal":{"name":"Bulletin de physio-pathologie respiratoire","volume":"11 2","pages":"95P-96P"},"PeriodicalIF":0.0,"publicationDate":"1975-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12335082","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}