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Biomedical subjects

D Lefebvre

Publications and source records attributed to D Lefebvre.

69 records · Page 4Linked to original sources
PubMedDate not supplied

[Thromboembolic risks and surgery for varicose veins].

The authors carried out a study on 53 patients operated on for varices with the object of determining the risk of postoperative thromboembolism. They tried to answer three questions : 1) What is the magnitude of the risk of thromboembolism after this kind of surgery? 2) What is the value of the different methods of detection available? 3) What attitude should be adopted towards therapy, not of thromboembolism as a complication, but of the threat of thromboembolism?

Anticoagulants↗
PubMedDate not supplied

Bone mineral decrease in the leg with unilateral chronic occlusive arterial disease.

OBJECTIVE: The links between osteoporosis and arteriosclerosis have been established by numerous epidemiological studies. Could arteriosclerosis induce bone mineral loss via ischemia or other pathological process? We carried out a comparative study of bone mineral density in both legs of patients with unilateral arterial disease of the lower limbs. METHODS: We studied 25 patients, 22 men and 3 women, whose mean age was 62.3 years (range 35-88 years). These patients had unilateral lower limb arterial disease of at least 3 months duration with a systolic index at least 50% lower on the affected than on the healthy side. Bone mineral content (BMC) and bone mineral densities (BMD) of the femoral neck, femur, tibia, foot and ankle of the affected and the unaffected legs were measured by dual x-ray absorptiometry (Lunar DPXL) and the results compared. RESULTS: Bone mineral density was significantly lower in the femur (-3.7%, p = 0.04), the foot and the ankle (-3%, p = 0.05) of the affected leg. There was a non-significant decrease in BMD of the whole femoral neck (-1.2%) and the trochanter (-4.4%, p = 0.08) on the affected side. Tibial bone mineral density was identical in both legs. Bone mineral content was lower on the affected side (-5.3%, p = 0.05) whereas fat mass and muscle mass were the same in both legs. CONCLUSION: The ischemia resulting from arterial disease of the lower limbs appears to have a direct deleterious effect on bone mineralization.

Absorptiometry, Photon↗
PubMedDate not supplied

[Inter-related arterial and venous pathologies].

The authors concomitant arterial and venous disorders. On the same patient. They point out the obvious preeminence of arterial disease on venous ones, and discuss about the panel of therapy association usable. They underline the necessity of saving the venous capital.

Arteries↗
PubMedDate not supplied

[Structural and functional anatomical bases of deep venous insufficiency of the lower limbs].

The authors consider the Extent of the several anatomical structures which constitute the deep venous network, and the part they can take in the case of deep venous insufficiency. Congenital Vascular diseases are called back in mind when considering Embryology, and point out the extent of the deep venous state; such veins can gather in periarterial plexus, at the muscular Level, and in going past all along main arterial axes. Among all the critical points of these axes, we must keep the popliteal veins, the femoral crossing, and the iliocaval one and elsewhere, the important question of venous valves and communicating and perforating veins. The part of the lymphatic network must be pointed out, because of its extent in the stasis phenomenons.

Femoral Vein↗
PubMedDate not supplied

[Pelvic circulation in the pregnant woman].

The authors point out the fact that there are few publications on this subject. Besides variations related to functional and hormonal associated with pregnancy, temporary variations occur in the venous system and which take the form of the development of extra-intra pelvic anastomoses at several sites.

Female↗
PubMedDate not supplied

The organogenesis and anatomy of vascular malformation.

According to an embryological basis, the Authors analyze the development of the vascular system and try to establish a differentiation between angiodysplasias and abnormalities. They define the characteristics of each group and make an attempt at classification. The major characteristics of differentiation are the evolutional aspects and the presence of arteriovenous fistulas.

Arteriovenous Fistula↗
PubMedDate not supplied

[The anatomic basis of vascular malformations].

Basing themselves on anatomical and embryological considerations, the authors suggest a distinction between angiodysplasias and abnormalities. They define the characteristics proper to these varieties and establish the bases of therapeutic inferences. They briefly recall the lymphatic malformations. Practical and therapeutic inferences.

Blood Vessels↗
PubMedDate not supplied

[Intra- and extra-pelvic venous connections. Anatomical study].

Regarding to clinical diseases, the authors emphasize the important part of pelvic veins as collateral flows when iliac channels are occluded. They point out the three mains streams of this collateral network: the obturator veins, the gluteal veins, and the pudendal veins. Longitudinal anastomoses are connected each other by transversal veins such as Santorini plexus, and sacral veins; they allow venous supply from one side to the other when two levels or more are involved.

Female↗
PubMedDate not supplied

[Phlebology and gynecology].

The authors give the pattern of several situations where are added phlebological and gynecological diseases. They summarize the several treatments and the practical uses for this. Medicolegal viewpoints are also taken in account.

Contraceptives, Oral, Hormonal↗
PubMedDate not supplied

[The "rete venosum plantare" (the plantar venous network or Lejars' venous sole of the foot)].

Looking at the bibliography of the venous sole of the foot (Lejars), the authors point out the opposite convictions concerning this structure. For some ones, it doesn't exist, but fort the others, it is a very important network of tiny veins, such as it was described by Lejars himself. However, all this studies, are made upon cadavers, injected or not, and must be compared with results from living people by the mean of angiography, non invasive Vascular Assessment, or RMN, which take in account vasomotricity.

Foot↗