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T Planiol

Publications and source records attributed to T Planiol.

At least 37 records · Page 2Linked to original sources
PubMed1976

[Diagnosis of cerebrovascular disorders using stannous technetium pyrophosphate].

A total of 122 cases of various neurological diagnoses (among which 72 cerebral infarcts, 7 intracerebral hematomas and 38 intracranial tumors) had two separate brain scans, performed within 48 hours of each other after the administration of pertechnetate and technetium stannous pyrophosphate. The comparison of the resulting seans indicates that, in addition of an osseous accumulation, the pyrophosphate localizes greatly in ischemic cerebral lesions, especially those observed during the second week of evolution. It seems that the uptake of pyrophosphate reflects the area of anaerobic changes whereas the accumulation of pertechnetate depends on the disruption of the blood brain barrier. The scintigraphic diagnostic of cerebral infarctions is greatly improved.

Brain Neoplasms↗
PubMed1976

[Advances in gammaencephalography for the study of intercranial lesions].

Simultaneously to the development of new techniques such as the computerized axial tomography, the gamma-angioencephalography is progressing in the field of cerebral investigation in its original way, keeping on non invasing character. In view to analyze this evolution we shall examine first its technical possibilities, then the extractible data of the various techniques. Finally we will consider in which way we must bring most of our effort for the best utilization of the gamma-angioencephalography in the routine work, on one hand, and for progressing in the knowledge of the physiopathology of some lesions, specially vascular accidents, on the other hand. Technical modalities are multiple. Besides the standard technique (pertechnetate angiography with rapid sequential views, regional transit curves, early and late static views) it is possible to replace or to repete the injection: --changing the patient's position, --using another radiopharmaceutical labelled with technetium -or another isotope, or two tracers for two compartments; --carrying out a pharmacodynamic or CO2 test, --using radioxenon, and secondly a pure vascular tracer, to measure relative regional blood pool and relative regional blood flow. a) morphological ones (vascular tracks, regional blood pool, radioactive areas: number, form, homogeneity, outline), b) dynamic and quantitative ones (transit times, blood flow, extravascular diffusion, changes of these parameters when changing the radiopharmaceutic, or when using a test). Progresses can take place in three ways, very closely related to each other: a) In the methodology, to precise --relative merit of the different radiocompounds according to the various cerebral lesions, --methods for examination according to the clinical problems, --computing and date processing techniques. b) In the indications, to choose the best, the simplest, though the surest method for the daily clinical problems, and the best one to assemble special information escaping to the morphological radiological techniques. This choice needs frequent and close discussions between clinicians and nuclear specialists. c) In the signification of the data, to interprate correctly: --preferential uptakes in lesions or in compartments, --changes in the relative volumes of vascular bed and extravascular space in lesions, --vascular reactivity to an hemodynamic test, --accumulation or clearance of a diffusible tracer such as xenon. It is not always easy to reach a non equivocal interpretation of a whole group of data. It can be better to give a descriptive analysis which brings together elements for the diagnosis and physiopathological observations helpful for a therapeutic action and to follow up the disease at short and long term.

Blood Flow Velocity↗
PubMed1976

[Study of congenital cardiopathies with left-right shunt using gamma-angiocardiography].

Red blood cells labelled with radioactive Technetium were injected intravenously, and the passage of the tracer through the cardio-pulmonary system recorded using a scintillation camera coupled with a numerical dosimeter. The results are presented as serial analoque pictures taken at the rate of two per second, as numerical tracings which are later processed, and as flow charts from predetermined areas of interest: the chambers of the heart, the lung parenchyma, and the aorta. This study is concerned with 58 patients with a left-to-right shunt, and about 40 normal examinations were used as a baseline for comparison. In cases of left-to-right shunt, the finding on the tracings is of abnormally prolonged activity in the lungs after a normal passage through the right side. The intensity-duration curves highlight this finding, and show an early recirculation peak in the right side of the heart and a slowing of pulmonary emptying, which can be evaluated numerically from the ratio C2/C1. A correlation has been found between this value and the ratio of pulmonary to systemic flow as calculated by oximetry. The correlation is even closer if a comparison is made between the curves of pulmonary radioactivity and the dye dilution curves. In certain cases, the shunt can be localised to the atrial or ventricular level. There are many indications for this safe investigation: --the diagnosis and monitoring of the flow through a left-to-right shunt in a child; --confirmation of the closure of septal defects after surgery; --clarification of an infudibulo-pulmonary syndrome.

Adolescent↗
PubMed1975

[Intracerebral hematoma in gamma-angio-encephalography].

The radionuclide angiography, of gamma-angio-encephalography (gamma-A.E.G.), a non invasive method, is able to bring specific information for the diagnosis of intracerbral hematoma (I.C.H.). In 25 out of 32 verified cases of I.C.H. the rapid sequential imaging shows from the arterocapillary time a deeply seated avascular area, which is a quite different aspect from the defect observed in ischemic A.C.V., or malignant tumors. The transit curves confirm the regional of circulating blood pool.

Brain Neoplasms↗
PubMed1975

[Treatment by urokinase of myocardial infarction and threatened infarction. Randomised study of 120 cases].

Two randomized series of 60 cases of myocardial infarction or menace syndrome have been treated at the acute stage, one by Heparin alone, the other by the combination Urokinase-Heparin. The average dosage was 300 mg Heparin in the first series, of 2,700,000 CTA units of Urokinase combined with 240 mg of Heparin in the second series. After the first 24 hours, equal heparinization was performed in both series up to the third week. Significantly different results were obtained in the two series. They favour Urokinase and concern: -- the disappearance time of pain, -- the course of the arrhythmias and of cardiac failure, -- the regression or limitation of the necrosis q waves and the lesion areas on the electrocardiogram. Finally the 30th-day overall mortality was 13% in the Heparin series and 3% in the myocardial infarction on the way of constitution, or which have done so for less than 24 hours.

Adult↗