Biorheology. Supplement : the official journal of the International Society of Biorheology最新文献

The Aachen clinical hemorheology test profile: a proposal for the documentation of hemorheological data in clinical medicine. 亚琛临床血液流变学试验简介:临床医学血液流变学数据文件的建议。

Biorheology. Supplement : the official journal of the International Society of Biorheology Pub Date : 1984-01-01 DOI: 10.3233/bir-1984-23s108

H Schmid-Schönbein, P Teitel

{"title":"The Aachen clinical hemorheology test profile: a proposal for the documentation of hemorheological data in clinical medicine.","authors":"H Schmid-Schönbein, P Teitel","doi":"10.3233/bir-1984-23s108","DOIUrl":"https://doi.org/10.3233/bir-1984-23s108","url":null,"abstract":"The recent development of specific methods to measure directly the microrheological determinants of blood fluidity allows to complement or even substitute global measurements of whole blood apparent viscosity or filtrability through sieves containing restricted pores. While such differentiation is mandatory for practical and theoretical reasons, there is the danger of loosing coherence of measurements essential for correlating hemorheology to other sciences. In an attempt to document hemorheological data in a simple yet comprehensive fashion, a test profile for the display of normalized data from subtests on hematocrit, plasma viscosity, red cell \"rigidity\" and tendency to red cell aggregation is proposed. Using procedures developed in the behavioural sciences, stringend criteria for evaluating the validity, reliability, standardization, economy and usefulness of individual subtests for the blood viscosity determinants and a compounded hemorheology test profile are proposed. There is good evidence that abnormal hemorheological behaviour of red cell plasma mixtures manifest themselves exclusively in situations associated with grossly reduced in vivo driving pressures and thence shear stresses. In these situations, in which a low flow state is caused by general hemodynamic changes, there is a danger that the blood looses its normal fluidity and undergoes a reversible viscidation: We propose the hypothesis that in these situation abnormally blood poses a risk of a flow limitation (and even interruption) by rheological abnormalities described above. The test profile presented has been developed to supply a more valid experimental method for subjecting the above hypothesis to experimental tests in the clinical situation.","PeriodicalId":79205,"journal":{"name":"Biorheology. Supplement : the official journal of the International Society of Biorheology","volume":"1 ","pages":"49-62"},"PeriodicalIF":0.0,"publicationDate":"1984-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3233/bir-1984-23s108","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"17647687","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}

引用次数: 5

Assignment of hemorheological instruments in the angiologic ambulance: first results and experiences. 血管救护车中血液流变学仪器的分配:初步结果和经验。

Biorheology. Supplement : the official journal of the International Society of Biorheology Pub Date : 1984-01-01 DOI: 10.3233/bir-1984-23s110

H Kiesewetter, H Radtke, H G Roggenkamp, F Jung, J Blume, R Schneider

引用次数: 1

Transient hemorheology in an air-bearing viscosimeter. 空气轴承粘度计中的瞬时血液流变学。

Biorheology. Supplement : the official journal of the International Society of Biorheology Pub Date : 1984-01-01 DOI: 10.3233/bir-1984-23s112

J C Ravey, S Ikimoto, J F Stoltz

引用次数: 1

A new simple method for measuring red cell aggregation. 一种测量红细胞聚集的简便新方法。

Biorheology. Supplement : the official journal of the International Society of Biorheology Pub Date : 1984-01-01 DOI: 10.3233/bir-1984-23s137

E Ernst, I Magyarosy, C Roloff, H Drexel

引用次数: 4

Filtration pressure and red blood cell deformability: evaluation of a new device: erythrometre. 过滤压力和红细胞变形性:一种新设备:红细胞计的评价。

Biorheology. Supplement : the official journal of the International Society of Biorheology Pub Date : 1984-01-01 DOI: 10.3233/bir-1984-23s145

M Guéguen, J M Bidet, F Durand, F Driss, A Joffre, B Genetet

{"title":"Filtration pressure and red blood cell deformability: evaluation of a new device: erythrometre.","authors":"M Guéguen, J M Bidet, F Durand, F Driss, A Joffre, B Genetet","doi":"10.3233/bir-1984-23s145","DOIUrl":"https://doi.org/10.3233/bir-1984-23s145","url":null,"abstract":"The authors have tested a new device that records the filtration pressure of a suspension of red blood cells (R.B.C.) passing through a 3 micron pore diameter filter. As the flow rate is constant, the pressure increase allows to appreciate an index of the R.B.C. deformability. In order to test the performances of this new equipment, the authors have studied the influence of the variation of the following parameters. Haematocrit from 0.5 to 2%, Buffer composition; time elapsing from drawing to measurement: from hour 0 to hour 3. This analysis has been performed on donors; on packed red cells preserved in CPD, from D0 to D21 and on patients specimens and the results have been compared to the whole blood filtration according to the Reid and Dormandy method. The following parameters were simultaniously measured: Whole blood viscosity by means of a Low Shear 30 viscosimeter, Intraerythrocyte ATP by bioluminescence, Membrane lipid composition (cholesterol, phospholipids), Scanning electron microscopy. This new apparatus, measuring the filtration pressure seems to be a more sensitive and reproductible method allowing to approach the RBC deformability, and quite usefull in clinical haemorheology.","PeriodicalId":79205,"journal":{"name":"Biorheology. Supplement : the official journal of the International Society of Biorheology","volume":"1 ","pages":"261-5"},"PeriodicalIF":0.0,"publicationDate":"1984-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3233/bir-1984-23s145","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"17647865","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}

引用次数: 19

Respiratory mechanical impedances. Methodology and interpretation. 呼吸机械阻抗。方法论和解释。

Biorheology. Supplement : the official journal of the International Society of Biorheology Pub Date : 1984-01-01 DOI: 10.3233/bir-1984-23s132

R Peslin, C Duvivier, B Hannhart

{"title":"Respiratory mechanical impedances. Methodology and interpretation.","authors":"R Peslin, C Duvivier, B Hannhart","doi":"10.3233/bir-1984-23s132","DOIUrl":"https://doi.org/10.3233/bir-1984-23s132","url":null,"abstract":"A synthetic approach to lung and chest mechanics is to apply pressure variations to the respiratory system over a range of frequencies and to study the amplitude and phase relationships between applied pressure and resulting gas or tissue flow. Such impedance measurements may be performed in different ways, which are not equivalent: the most usual are to measure gas flow at the mouth while pressure is varied either at the same place (input impedance) or around the chest (transfer impedance). Transfer impedance measurements were performed in healthy subjects from 3 to 70 Hz and tentatively interpreted with a model featuring tissue elasticity, resistance and inertance, gas compressibility, and airway gas resistance and inertance. The pressure-flow ratio was minimum at 5-10 Hz and increased very fast above 50 Hz. The phase angle was nil around 7 Hz, of + 90 degrees at 30-40 Hz and close to 180 degrees at 70 Hz. The validity of the model is supported by the quality of the fit to the data up to 50 Hz, the values of the coefficients and the results of experiments where the subject's mechanical properties were varied.","PeriodicalId":79205,"journal":{"name":"Biorheology. Supplement : the official journal of the International Society of Biorheology","volume":"1 ","pages":"183-91"},"PeriodicalIF":0.0,"publicationDate":"1984-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3233/bir-1984-23s132","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"17647992","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}

引用次数: 5

Blood viscosity measurements in both extensional and shear flow by a falling ball viscometer. 用落球粘度计测量拉伸和剪切流动中的血液粘度。

Biorheology. Supplement : the official journal of the International Society of Biorheology Pub Date : 1984-01-01 DOI: 10.3233/bir-1984-23s114

J Doffin, R Perrault, G Garnaud

引用次数: 59

Methods to study rheological properties of blood during clotting. 方法:研究血液在凝血过程中的流变特性。

Biorheology. Supplement : the official journal of the International Society of Biorheology Pub Date : 1984-01-01 DOI: 10.3233/bir-1984-23s103

E Fukada, Y Sugiura, M Date, M Kaibara

引用次数: 11

Leucocyte removal prior to study of erythrocyte deformability. 红细胞变形性研究前的白细胞去除。

Biorheology. Supplement : the official journal of the International Society of Biorheology Pub Date : 1984-01-01 DOI: 10.3233/bir-1984-23s150

J Stuart, M W Kenny, M Meakin, G S Lucas, N M Caldwell

引用次数: 8

The Technicon Ektacytometer: automated exploration of erythrocyte function. Technicon细胞计数仪:红细胞功能的自动探测。

Biorheology. Supplement : the official journal of the International Society of Biorheology Pub Date : 1984-01-01 DOI: 10.3233/bir-1984-23s152

M P Nossal

{"title":"The Technicon Ektacytometer: automated exploration of erythrocyte function.","authors":"M P Nossal","doi":"10.3233/bir-1984-23s152","DOIUrl":"https://doi.org/10.3233/bir-1984-23s152","url":null,"abstract":"The Ektacytometer is a visco-diffractometric method to preferentially examine the functional properties of erythrocytes. The realization of this method in the form of an automated laboratory instrument, the Technicon Ektacytometer, is described. A suspension of RBC is submitted to a uniform shear stress. The resulting deformation of the cells is seen as an elongation of the diffraction image and expressed as the Elongation Index or EI. EI may be traced on an X-Y recorder as a function of stress, time and of suspending medium osmolality. The osmolality is varied automatically in the viscometer and automatically measured via its conductivity, resulting in an \"Osmoscan\". The Osmoscan is highly reproducible and requires only 150 microliter of blood and 5 minutes per sample. Its high sensitivity to small changes in erythrocyte properties permits the separation of factors affecting RBC deformability, and provides a measure of the osmotic fragility which correlates very well with the traditional test. Other applications are described, including mechanical fragility assays on whole cells, relaxation times of ghosts and the automatic variation of PO2. Possible future applications are suggested.","PeriodicalId":79205,"journal":{"name":"Biorheology. Supplement : the official journal of the International Society of Biorheology","volume":"1 ","pages":"291-5"},"PeriodicalIF":0.0,"publicationDate":"1984-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3233/bir-1984-23s152","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"17647766","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}

引用次数: 5