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Biomedical subjects

B Devauchelle

Publications and source records attributed to B Devauchelle.

At least 37 records · Page 2Linked to original sources
PubMed1995

[Computer-assisted design and manufacture of an orbital cavity prototype].

Based on the results obtained in two dimensions or extrapolated into three dimensions by current medical imaging techniques (CT scan, magnetic resonance imaging), it is possible, under certain conditions, to create hard complex anatomical specimens, of obvious value in cold surgery. Two successive approaches of design and manufacture of an orbital cavity prototype are presented, as a preliminary to industrial productions soon to be released onto the market.

Biomechanical Phenomena↗
PubMed1995

[Third dimension and craniofacial plastic surgery].

Via an inverse approach to that of the Renaissance painter's treatment of perspective, the third dimension must be obtained from flat radiological information in order to reconstitute (virtually and materially) the volumes which it analyses. These images are analysed mathematically by computer. The applications are and will be numerous, especially in cranio-maxillo-facial surgery. Surgical simulation, without claiming to assess their soft tissue repercussions, section and virtually reposition bone segments: symmetrization and correction of hypotrophy are easy to visualize; computer-assisted surgical teaching applications (endoscopic surgery) are discussed. Multimodal images superimpose information from various sources: operative views and pre-recorded images are available to the surgeon and guide him in his "surgical navigation". Prototyping of skeletal anatomical specimens (prior to tumour or soft tissue specimens) provides the therapist with a precise preoperative spatial configuration of the abnormalities to be corrected, and the reconstructions to be performed. These developments, and others to come, are the sole objective of 3D imaging, beautiful in itself, but ineffective alone.

Computer Simulation↗
PubMed1994

[Microsurgery and reconstruction in facial oncology].

The desire to improve the post-operative lives of throat cancer patients and the additional problem posed by trying to conceal visible facial scars are the main motivations of reconstructive surgery in facial cancer treatment. In this field, microsurgical techniques have found their place and are used to the upmost efficiency when the final result is taken into account. Even better, these techniques are used to attempt an accurate reconstruction of different structures destroyed by the tumor or drastic surgical intervention, by using other parts of the patient's body. Microsurgery is bringing us closer to the miracles of Cosmas and Damian, the legend that surrounds. Tagliacozzi, the figures of surrealistic pantings, and the universival myth of the mask... The relative youth of these techniques in the facial cancer field and the lack of effective medical treatments lead us to believe that its potential growth is quite large and promising. Four distinct chapters are used to illustrate the different microsurgical techniques in cutaneous tissue loss, mucous tissue loss, bony tissue loss and the repair of sequellas. But reality reminds us that tissue composition is much more complex and that even today, microsurgery offers only a crude replacement in relation to the structures that it seeks to reconstruct.

Bone Transplantation↗
PubMed1992

[Should microsurgical mandibular reconstruction be dissociated?].

Microsurgical transplant has the additional advantage over bone graft of being a composite tissue, resembling the defect it is intended to replace. This applies particularly to the mandible, as the mucocutaneous tissues are intimately applied over the bone. Regardless of the ingenuity of the transplant design and the different variations, none of the flaps used in this series of 37 microsurgical reconstructions was able to validly reconstruct bone and/or mucosa and/or skin in a single operative stage. It very rapidly became apparent that microsurgical reconstruction of the mandible needs to be divided into several stages in order to taken into account the mucosal defect. This choice of a more difficult alternative based on the lack of bone donor sites is compensated by the good tolerance of intestinal transfers to the buccal cavity.

Adult↗
PubMed1991

[Metoclopramide intolerance and oral manifestations].

Metoclopramide is a widely used product, which can accidentally cause acute dyskinesia, of which several forms may be observed, including dysarthria, tetany, spasmophilia, false cerebral vascular insult, trismus, hysteriform spell.... In all those cases, one should think of giving an antiemetic and of properly orienting history-taking, thus avoiding a longer stay in hospital that would not be justified. This is demonstrated by two patients recently admitted into the department of maxillofacial surgery and stomatology with maxillofacial signs related with the adverse effects of this kind of drug.

Adolescent↗
PubMed1990

[Neurovascular sequelae related to the removal of forearm fasciocutaneous free flaps with radial pedicle. Preliminary study].

The authors study the consequences of amputation of the radial artery in order to create a Chinese forearm graft on the blood supply and innervation of the upper limb. After a brief review of the anatomy, the haemodynamics of the upper limb are studied in detail. Preoperative assessment by Hallen's test is generally sufficient. Postoperatively, pulsed Doppler studies provide the most useful information. Compensatory development of the interosseous artery is always observed and, in seven out of nine cases, this is associated with a marked increase in the blood flow in all of the arteries of the upper limb, especially in the hand. Of all of the methods of investigation available, this examination is able to demonstrate the safety of forearm grafts in the very great majority of cases.

Arm↗
PubMed1989

[Myiasis: facial location. Apropos of a case of Dermatobia hominis infection].

Myiases constitute a parasitic disease always secondary to the presence of the larvae of certain insects, particularly diptera, in skin wounds ("cutaneous myiases") or in the body ("deep myiases") of man or vertebrates. Larvae or maggots are able to invade natural cavities and induce myiasis. They can invade the nasal fossae causing "nasomyiases", the eyes causing "ophthalmomyiases" and the ears causing "otomyiases". They can penetrate further, causing urinary tract "cystomyiases", vaginal or gastrointestinal myiases. They can invade the scalp or complicate surgical wounds "surgical myiases". These diseases are initially confused with other pathologies, but the discovery of a larva in one of these sites is a certain sign of myiases. When the diagnosis has been established, treatment is generally simple and cure is rapidly obtained.

Adult↗
PubMed1987

[Use of the free forearm flaps in cervicofacial surgery. Apropos of 5 cases and review of the literature].

The free fasciocutaneous forearm flap has been described only recently. Five cases of pharyngeal or oral repair with a forearm flap (FAF) are reported and used as a basis to discuss anatomical features and the technique used for removal of the flap. The relevant literature is reviewed. The FAF appears to be the flap of choice for reparative surgery of pharynx or mouth regions in oncology, the principal advantages of this flap being: fineness, flexibility and plasticity of the skin, reliability and lack of morbidity, and function effectiveness with respect to phonation and feeding. Indications for forearm and myocutaneous flaps in oncology of upper respiratory and digestive tracts are assessed critically, other indications for the forearm flap being cutaneous repair of cervicofacial lesions due to tumor or injury. The forearm flap is of pronounced value for cervicofacial repair surgery and constitutes a new step in the plastic conception of these repair procedures.

Adult↗
PubMed1987

[Respective indications for free and pedicle flaps of the latissimus dorsi in maxillofacial surgery].

Retrospective analysis of 41 cases of transfer of free and pedicle musculocutaneous flaps of latissimus dorsi for selected or obligatory maxillofacial indications resulted in the review and critical assessment of the different modes of utilization of these flaps. Experience acquired, and continuously updated by new scientific data or a new clinical case, justifies the use of this exceptional technic, which should not be extended to include those cases able to be treated by simpler, more reliable methods. Similarly the fact that this muscle can be transferred using a microsurgical technic cannot enlarge its use beyond that motivated by reasoned medical imperatives. Modalities of preparation of the flap are described and its multiple applications demonstrated using several examples: indications for latissimus dorsi flap in maxillofacial surgery and reasons for performance of micro-anastomotic transfer.

Female↗
PubMed1985

[Treatment of inveterate unilateral dislocations of the mandible by open repositioning of the condyle and meniscectomy].

A new method for treating inveterate forms of mandibular luxation is described, after a brief review of conventional therapeutic procedures. The route of approach chosen provides wide exposure of the temporo-mandibular joint, the endoarticular approach ensuring protection of pericondylar venous plexuses and of the internal mammary artery by allowing section of the external pterygoid tendon and the performance of a juxta-cervical capsulotomy. Excellent results were obtained in two patients with unilateral inveterate dislocation of the mandible operated upon using this procedure.

Adult↗
PubMed1985

[Prevention of bacterial endocarditis in heart patients during dental procedures].

Better understanding of the mechanisms of the development of subacute bacterial endocarditis following stomatological procedures in the patient with heart disease implies the more rational use of prophylactic measures. Preventive antibiotics, often given empirically, decrease the unavoidable bacteremia threshold and hence the threat of endocarditis. After reviewing the risks factors linked with the cardiac problem and with the stomatological procedure, the authors justify the choice of a simple prophylactic protocol, linked both to the microbial types encountered as well as to commonly used effective antibiotics.

Anti-Bacterial Agents↗
PubMed1985

[Posterior iliac donor sites. Should they be considered more often?].

Spongy bone grafts are characterised by their resistance to infection and their great osteogenic potential. These qualities are valuable in facio-maxillary surgery. The anterior superior iliac crest, the usual donor site for cortico-spongy bone grafts is unsuitable for the removal of large quantities of spongy bone. The posterior iliac crest, which is used by orthopaedic surgeons, is a rich donor site for spongy bone, which is not generally used by facio-maxillary surgeons. The abundance and quality of the bone obtained, the simplicity of the postoperative course and the relative absence of pain of this site make it a good indication. The change in the operative position should not constitute an obstacle to its use.

Bone Transplantation↗