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Biomedical subjects

M Farah

Publications and source records attributed to M Farah.

23 records · Page 2Linked to original sources
PubMedDate not supplied

[Influence of age on several parameters of the Doppler signal at the carotid level (author's transl)].

Doppler recordings are an interesting method of exploration of the circulatory system and more information can be obtained than is generally accepted. This study demonstrates the influence of age on the Doppler signal treated in 3 different ways. This is done in order to obtain supplementary criteria if possible, which can be used to assess arterial aging and its possible pathological character. The results show the dispersion of the resistance index R after 50 years of age, many subjects having an increased index. The influence of various factors such as hypertension, smoking..., are analyzed. Particular attention is drawn to the morphological changes in the curve. Hard echos that are usually filtered are specifically analyzed. These represent the reflexion of ultrasounds on the arterial wall and it could be possible to obtain information on flow rate and vessel wall elasticity. Preliminary results show important variations of the signal with age. Doppler recordings from the carotid vessels can be used to follow, in an approximate manner, the rapid variations of cerebral blood perfusion. The during of circulatory disturbance was studied when the cerebral circulation was exposed to a particular situation requiring rapid adaptation: in this case the squatting-standing test. Large differences were observed according to age.

Adult↗
PubMedDate not supplied

Primary mediastinal liposarcoma: a case report and review of the literature.

A case of mediastinal liposarcoma (LPS) in a 49-year-old female is described. Primary LPS of the mediastinum are very rare tumors. They occur mainly in adults but may be encountered in children. They are characterized by their large size and their variable histologic subtypes, which correlate with the clinical behavior and the prognosis. The radiologic features are nonspecific but are suggestive of the diagnosis. A tissue biopsy is needed for the final diagnosis. The treatment of choice is surgical with wide margin resection. Chemotherapy and radiotherapy are ineffective modalities, used in unresectable or incompletely resected tumors. The prognosis depends on the histologic subtypes and completeness of surgical excision.

Female↗