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Biomedical subjects

J J Delouvrier

Publications and source records attributed to J J Delouvrier.

12 recordsLinked to original sources
PubMed1983

[Failure of surgery for lumbar spinal stenosis. Apropos of 38 cases verified by computed x-ray tomography].

The authors have reviewed 38 patients who had been operated on for lumbar spinal stenosis. All were studied by C.A.T. scanning. In 28 instances the results were satisfactory. In 22, the scan was normal but in 4 a central stenosis remained and in two a lateral stenosis. Despite the fact that the patients were asymptomatic, the authors consider that they may be subject to recurrence in future. The results were fair or poor with persistent neurological claudication or root impairment. In 8 instances the scanning was performed of the whole length of the lumbar spine and showed thick remaining central stenoses, two of them at a level higher than the level of the surgical procedure. These cases had not been diagnosed by pre-operative myelography. In two instances the root was still compressed despite total laminectomy and joint resection. In two instances the post-operative scan did not reveal the cause of the failure but the whole length of the lumbar spine had not been examined. It is concluded that total laminectomy and joint excision is the safer surgical procedure in cases of root impairment but the procedure may lead to instability in instances where the lumbar spine is still mobile. This may have to be treated by arthrodesis. Tomodensitometry is of considerable help but is not the only fact on which surgical procedures should be based.

Adult↗
PubMed1982

[Fischer's "one and a half" syndrome: associated paralysis of horizontal eye movements and anterior internuclear ophthalmoplegia: report of 5 cases (author's transl)].

Five cases of Fischer's "one and a half" syndrome are reported. A complex central ophthalmoplegia provokes paralysis of horizontal eye movements on the affected side in both eyes and an internuclear ophthalmoplegia on the same side. No horizontal movement, except in convergence, is possible in the eye on the affected side, the other eye exhibiting movement between the median line and abduction only. Three patients with this syndrome were examined by oculography. The outcome was fatal in one case, pathological examination demonstrating widespread damage to half the pontine protuberance. In another case scanner imaging showed a paramedian protuberential lesion. The syndrome is most frequently observed in multiple sclerosis and cerebrovascular accidents but may follow any lesion in this region. Physiopathological features of the disorder are discussed.

Adolescent↗
PubMed1982

[Orthopedic radiology of the lower limbs. The two-dimensional "Complete Angles Lengths" technique (author's transl)].

The "Complete Angles Lengths (CAL)" is a new technique enabling geometrical definition of the lower limbs (angles and/or lengths) by the use of different reference points. Normal equipment can be employed, with or without radio control, and with ampliphotography if necessary. Localised orthoradiographs are performed through a fine metallic grid that can be made by the radiologist. Magnetic bands containing the programme for calculation are introduced into a packed calculator, and results are obtained automatically after feeding the measurements taken from the films into the machine. If the mode of employ is respected, the precision of the CAL is equal to or greater than that obtained with conventional methods.

Electronic Data Processing↗
PubMed1981

[Static radiological measurements of lower limb deformities (author's transl)].

A new method is described which employs three angular components for complete definition of lower limb deformities. These three angles can be the three static angles observed in two large films, anteroposterior and profile, of the two lower limbs (flexion-recurvation, varus-valgus, axial rotation). A more precise definition of the deformity is the rotation of the oblique axis which transforms a normal lower limb (the other side if it is healthy) into a deformed one. In this concept, two angles determine the axis, another angle defining the rotation around this axis. The technique is described and the theory exposed, simple cases being able to be resolved by pure geometry, the matricial theory enabling data processing of other cases by means of a pocket calculator.

Biomechanical Phenomena↗
PubMed1981

[Lower limb length measurement. Precision orthoradiographic methods (author's transl)].

The precision of the Bell-Thompson method for measuring lower limb length can be considerably improved by three simple additional procedures: estimating the distance between the anatomical plane and the examination table; marking the diaphragm opening area on the film; automatically correcting errors due to projection conicity and obliqueness of the segment measured by means of a programmable pocket calculator.

Adult↗
PubMed1980

[Computer tomography changes in multiple sclerosis (author's transl)].

An attempt is made to evaluate the semiological data supplied by computer tomography, following its use on several occasions in 4 patients with multiple sclerosis. Three known signs in the encephalic forms are defined: cerebral atrophy, low density plates of sclerosis that do not take up the contrast medium, and those that do. These localized lesions are distinguished by their frequent multiplicity, often periventricular location, and absence of a mass effect. The semiological value of these signs involves discussion on the poor results of statistical evaluation, the significance of histology examination results, which are still being studied, and more particularly the variability, the best evidence of which seems to be the beginning and/or the changes occurring in contrast medium uptake. To this major diagnostic argument can be added the discovery of multilocular lesions which are sometimes present without clinical manifestations. Computer tomography is an essential procedure for establishing the differential diagnosis of multiple sclerosis, avoiding numerous valueless arteriographies, is a fundamental method for early positive diagnosis, and perhaps an element for establishing prognosis.

Adult↗
PubMed1980

[Determination of effective atomic number and electronic density by computed tomography with dual energies. Application to the thalamus (author's transl)].

The authors have studied seven thalamic hyperdense lesions of five patients in managing, at the same level, successively two scans with a computer tomograph at two different energies. After they recall their methodology of testing their C.T. and computations, they have found the effective atomic number and the electron density of these lesions. All (one Fahr disease and six old hemorrhages) have both high effective atomic number and electron density. They discuss the limits of this technic but they emphasize the great interest to see the chemical aspects of the structures observed in C.T.

Brain Diseases↗
PubMed1979

[Use of cerebral computer tomography for the diagnosis of multiple sclerosis].

The authors describe computer tomography findings in multiple sclerosis (MS)), and attempt an evaluation of the value of cerebral computer tomography for the diagnosis of this disease, especially those forms in which the clinical diagnosis is uncertain. A total of 33 patients, 15 men and 18 women, were studied. According to McAlpine's criteria, 21 patients had established MS, 2 were probably MS cases, and the other 10 were possible cases of the disease. The scanner used was an EMI 1010 apparatus giving 13 mm thick sections, with a matrix of 160 X 160. A contrast medium was injected systematically. Abnormal computer tomography results were noted in 28 of the 33 patients, including one or more low density areas in the white substance in 26 patients, taking up of the contrast medium after injection in 10 patients, and cerebral atrophy in 24 patients. Cases where only one of these anomalies was present are rare, and the various anomalies noted on computer tomography are usually associated in varying proportions. In most cases, the computer tomography findings were not related to any specific clinical picture. In cases of established MS, computer tomography can provide information on the extension and progression of the lesions at the time of examination. Out of the 12 cases in which clinical diagnosis was uncertain, 9 presented abnormal findings (low densities and/or taking up of contrast medium); the level of CSF gamma-globulins was normal in 4 of these 9 patients; visual evoked potentials were not altered in the 5 out of these 9 patients studied. In 3 patients with medullary signs, several low cerebral trunk and white substance of the cerebral hemispheres. When diagnosis is uncertain, cerebral computer tomography is the method of choice for demonstrating latent MS lesions of a certain type: it complements neurophysiological studies (visual, auditory, and somesthesic evoked potentials), used at the present time for the diagnosis of MS by exploration of the optic tracts and cerebral trunk.

Adult↗