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Biomedical subjects

S Baux

Publications and source records attributed to S Baux.

At least 19 recordsLinked to original sources
PubMed1997

[Luno-triquetral angle and dislocation of the wrist].

The mediocarpal force, determined by the distal articular surface of both, lunate and triquetral bones, abuts against the double bolt, composed of the scaphoid and the radial styloid process. An important wrist trauma can rupture this bolt and cause a proximal and lateral translation of the distal carpal row. This situation may present under 3 forms: fracture of the scaphoid bone and midcarpal dissociation; fracture of the radial styloid process with scapholunate dissociation; scapholunate dissociation, associated with a dorsal radiotriquetral ligament rupture and medial translation of the lunotriquetral block. Experimental and clinical illustration of this process, discussion and treatment.

Carpal Bones↗
PubMed1996

[Painful extensor digitorum brevis].

A boxer suffered from a painful extensor digitorum brevis muscle. The pathology involved the proximal insertion on the lunate and caused a specific form of carpal instability. On excision of the muscle the pain disappeared.

Adult↗
PubMed1996

[Complications related to the existence of a lunotriquetral synostosis].

The authors report the observation of a patient, in whom coexisted a hypersolicitation of the wrists, a congenital lunatotriquetral fusion, a stress fracture of the hook of the hamate and a VISI, giving evidence of a medial carpal instability. They analyse the factors, which allow to understand the relations between these different elements. They caution against arthrodesis, advocated in the treatment of VISI.

Adult↗
PubMed1995

[Extravasation of paclitaxel (Taxol)].

Paclitaxel is a new antimitotic derived from yew-tree, used for the treatment of ovarian and breast cancers. The local toxicity of paclitaxel is still poorly known. We report one of the first observations of accidental subcutaneous extravastion of paclitaxel. Local epidermic necrosis was observed and evolution was good with local treatment only. Treatments of such extravasation are discussed.

Aged↗
PubMed1994

[Increased viability of skin flaps using naftidrofuryl. An experimental study in the Wistar rat].

The effect of a vasodilator (naftidrofuryl) was evaluated in an experimental study in rats concerning the viability of a skin flap. The reference flap is a dorsal skin flap deliberately shaped very long in order to obtain necrosis of its distal extremity. This necrosis is measurable and sufficiently reproducible. Using a comparative study between a control group of ten rats and a group of rats treated by intraperitoneal injections of naftidrofuryl for ten days, the authors demonstrated a significant difference between necrosis in the two groups. Naftidrofuryl treatment increases the length of the viable part of the skin flap in rats. This product achieves a kind of medicinal autonomy much easier than a surgical autonomy.

Animals↗
PubMed1994

[Reconstruction of the medial collateral ligament of the knee in rats using a free autogeneic transplant of fascia lata, ligament or tendon].

After resecting the lateral collateral ligament of the knee in 56 male mature rats, the authors replaced it by an autogenous transplant of the same size, made of fascia lata, ligament or patellar tendon. The authors then studied this transplant after an evolution of 2 days to 5 1/2 months. This lapse of time can be divided into three stages: an initial stage (first week), marked by transplant necrosis and acute inflammation--an early stage (from the second to the fourth week), which shows the migration of the cells from the host to the transplant and the rebuilding of collagen fibers. Tissues with a loose, extensible, but weak texture, such as the fascia lata, are totally colonized by the fibroblasts. Tissues with a dense, strong, but less extensible texture, as the patellar tendon, are soon destroyed and recolonized at the periphery, whereas their center is destroyed and recolonized by fibroblasts later and more irregularly--a late phase of consolidation (from the second to the fifth month), which shows the rebuilding of a dense collagen network and its reorientation. In fascia lata transplants, this new collagen is homogeneous and is made of parallel bundles. In tendon transplants, the network is not homogeneous. It has a persistent nodular aspect at the periphery and well-oriented bundles, separated by calcified or granulomatous foci at the center. In the case of ligament transplants, the new collagen network shows an intermediate aspect between the two described above. The weakest regular connective tissues are the best for ligamentoplasties, and tendons are the worst.

Animals↗
PubMed1993

[Trans-scaphoid-triquetrum-retrolunar fracture luxation. A case report].

The authors report an exceptional case of retrolunate dislocation of the carpus associated with a Schernberg type III scaphoid fracture and a transverse fracture of the triquetrum at the level of its median crest, avulsing all of the upper third of this bone. That describe the emergency treatment and the radiological and operative findings.

Adult↗
PubMed1993

[The frondiformis ligament and stabilization of the posterior tarsus].

The frondiformis ligament is a part of the retinaculum extensorum of the instep. Actuated by the tendons of the extensor digitorum longus, it takes a direct effect on the talus and the calcaneum, induces the valgus of the tarsus and contributes to the stability of the ankle and the foot.

Ankle↗
PubMed1992

[The posterior interosseous artery. Descriptive anatomy. Possibilities of clinical and orthopedic applications].

Study of 25 forearms of fresh cadavers, whose the arteries have been injected with colored latex. The posterior interosseous artery is known for its superficial branches, which allow to autonomise cutaneous dorsal flaps. Its way, along the ulna allows to imagine other possibilities by use of the constant branches of this artery, which supplies the proximal and the distal extremities of the bone. The proximal branch is the posterior recurrent radial artery, which supplies the posterolateral face of the proximal pars of the diaphysis, in touch of the insertions of the supinator muscle, and the lateral edge of the olecranon. The distal arteries shape 2 or 3 fascicles, which disperse on the extremity of the diaphysis and the cervical pars of the ulna. To realize a vascular pedicle with the posterior interosseous artery, two cases can be envisaged: use of the distal ulnar epiphysis and creating of a direct pedicle. use of the proximal ulnar epiphysis and creating of a recurrent pedicle.

Anastomosis, Surgical↗
PubMed1992

[The intermetatarsal transverse ligaments and their connections with the tarsometatarsal articulations].

The authors have performed 20 systematical dissections of the distal part of the foot, conserved in the Toulon's liquor and 3 dissections of fresh cadavers. The last ones have been submitted at different puttings in charge before and after the resection of the intermetatarsal transverse ligament. The intermetatarsal transverse ligament is supple, extensible, but very strong. It constitutes the area of convergence of all the neighbouring fibrous structures and of several tendons of the foot. It connects together the heads of the metatarsus. It renders them jointly liable and its action is reflected above. By its modulating of the convergence of the metatarsus and their necessary associated palmar inclination, by its limitation of their divergence in relation with their dorsal inclination, it modulates and it limits the amplitude of the tarsometatarsal joints. It is helped for that by the little intermetatarsal transverse ligaments, whose the presence has been always confirmed. The metatarsus varus, very frequently associated with the hall valgus, means the escape of the first ray from the effect of the transverse intermetatarsal ligament.

Biomechanical Phenomena↗
PubMed1992

[Extension of the fingers. III. Morphologic and structural study].

The volar fascicles of the interosseous muscles possess two separate components: the proximal and glenoidal one, the distal and aponeurotic other. The armature of the dorsal aponeurosis is constituted the deep, the central and the collateral expansions of the extensor digitorum muscles, and the interosseous muscles, whom are added the lumbrical muscles. The deep expansions are constant and are fixed respectively at the basis of the first phalanx. The central and the collateral expansions constitute equally the central and the collateral, then terminal tendons, which are respectively fixed at the basis of the second and at the third phalanx. The unitive structures: dossiere, triangular and retinacular ligaments are intricate with this of the armature and render jointly the whole. All the concerned fascicles have the mechanical and histological characteristics of the tendon.

Biomechanical Phenomena↗
PubMed1992

[Extension of the fingers. IV. Morphologic and structural study].

The putting in tension of the dorsal aponeurosis of the digits induces its retraction and the nearness of its insertions on the basis of the 3 phalanges. It depends on the extensor digitorum, interosseous and lumbrical muscles. The aponeurosis is not a single driving belt, but set off in itself 3 types of reaction: 1) The gliding on the sides of the pyramid, which constitute the proximal epiphyses of the phalanges. It suppresses the central dorsal-ward tensions. 2) The displacement of the axes of insertion and rotation of retinacular ligaments inducing collateral volar-ward tractions. 3) The modifications of the way of the structures of transmission: at one time the lengthening of the way is induced by the interactions of the fibers; at other times a shortening is suppressed by the extension of the close proximal joint. Analysis of the different fibrous and fascicular interactions and translations.

Biomechanical Phenomena↗
PubMed1992

[Extension of the fingers. V. Anatomic approach to lesions of the extensor apparatus].

The physiopathology of the main deformities of the fingers, induced by the injury of the dorsal aponeurosis of the fingers, is caused by an imbalance of forces: proximally between extrinsic and intrinsic muscles; distally between central and collateral structures. The ulna Claw, caused by the whole paralysis of the intrinsic muscles, can be corrected by an interosseous tenodesis on the basis of the finger. The boutoniere is induced by the exaggeration of the action of the collateral structures with respect to this of the central structures. The swan neck is induced by the exaggeration of action of the central structures with respect to this of the collateral structures. The surgical treatment consist to give back those structures their normal lengthening and way, or else to create new detours or shortenings, allowing to give back the balance. So, any structures, spared by the traumatism, will not injure by the surgeon.

Finger Injuries↗
PubMed1992

[Experimental carpal displacement induced by ligamental lesions].

Ligamentous lesions were created experimentally in 40 fresh cadaver wrists. The precise localization of traumatic rupture of the ligaments and the subsequent carpal imbalance were defined by the comparison between the experimental results and the clinical displacements. The displacements may be permanent, sequential or induced by external forces. Lesions of capsular ligaments cause the displacement. There are 3 functional units; the distal scaphoid complex; the palmar ligaments which form a "belt", consisting of the lateral external ligament, the radiocarpal ligaments an the radiate ligament; the medial ligaments, which also form a "belt" consisting of the palmar triquetral ligaments on each side of the triquetrum. The sprains are caused by a lesion of a functional unit. The lateral sprain is characterized by a lesion of the distal scaphoid complex. The scaphoid moves into a horizontal position, causing a dorsal deviation of the lunate and a scapholunate diastasis. The central sprain is induced by a rupture of the palmar "belt", causing an anteroposterior radiocarpal or mediocarpal drawer movement. The medial sprain is induced by the rupture, of different extents, of the medial ligaments. On examination, there is either a click or a palmar deviation of the lunate, sometimes with a lunotriquetral diastasis. The dislocations of the wrist are caused by lesion of several ligamentous units.

Biomechanical Phenomena↗