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Biomedical subjects

Y Tourné

Publications and source records attributed to Y Tourné.

12 recordsLinked to original sources
PubMed2006

[Congenital club foot: treatment in childhood, outcome and problems in adulthood].

PURPOSE OF THE SYMPOSIUM: Treatment of idiopathic talipes varus, or congenital clubfoot, is designed to re-align the foot to alleviate pain and allow plantigrade weight bearing with adequate joint motion despite the subnormal radiographic presentation. This symposium was held to review current management practices for congenital clubfoot in children and to analyze outcome in adults in order to propose the most appropriate therapeutic solutions. MANAGEMENT OF CONGENITAL CLUBFOOT IN CHILDREN: Idiopathic talipes varus can be suspected from the fetal ultrasound. Parents should be given precise information concerning proposed treatment after birth. Deviations must be assessed in the newborn then revised regularly using objective scales during and after the end of treatment. This enables a better apprehension of the evolution in comparison with the severity of the initial deformation. Conservative treatment is proposed by many teams: a functional approach (rehabilitation and minimal use of orthetic material) or the Ponseti method (progressive correction using casts associated with percutaneous tenotomy of the calcaneal tendon) are currently preferred. If such methods are insufficient or unsuccessful, surgery may be performed as needed at about 8 to 11 months to achieve posteromedial release. Good results are obtained in 80% of patients who generally present minimal residual deformations (adduction of the forefoot, minimal calcaneal varus, residual medial rotation, limitation of dorsal flexion), which must be followed regularly through growth. The difficulty is to distinguish acceptable from non-acceptable deformation. At the end of the growth phase, severe articular sequelae are rare (stiff joint, recurrence of initial deformation, overcorrection) but difficult to correct surgically: osteotomy, tendon transfer, double arthrodesis, Ilizarov fixator. Gait analysis is essential to quantify function and obtain an objective assessment of the impact on higher joints, providing valuable guidance for surgical correction. OUTCOME IN ADULTHOOD: There have been very few studies evaluating the long-term functional outcome after treatment during childhood. According to two studies presented at this symposium (Brussels, Lausanne), results have been generally good but with subnormal radiographs irrespective of the type of treatment or how early treatment started in childhood. Hypoplasia of the talar dome is a constant finding and is correlated with limitation of dorsal flexion of the ankle joint. A small degree under-correction is often observed but well tolerated while overcorrection is generally less well tolerated. Functional outcome depends highly on preservation of subtalar joint motion. There have been no reports on the results of treatment of sequelae in adults. Most problems (pain, stiffness, osteoarthritis) are observed in the mid or rear foot. Indications for conservative surgery (osteotomy) of the mid or rear foot are rare compared with indications for combined arthrodesis. Talocrural decompensation is a turning point observed in the adult. Management at this point is difficult: fusion of the ankle worsens the situation by increasing the stress on the forefoot and aggravating the disability; implantation of an ankle prosthesis is technically difficult and remains to be fully developed. Treatment of the dorsal bunion of the great toe may require tendon transfer and/or fusion. CONCLUSION: A child born with clubfoot will never have a normal foot in adulthood. Sequelae present at the end of growth will intensify during adult life; under-correction is easier to treat in adulthood than overcorrection. The most difficult problems in adulthood are: neglected clubfoot, over correction, and degradation of the talocrural joint.

Adult↗
PubMed2005

[Posterior ankle impingement syndrome: a retrospective study in 21 cases treated surgically].

PURPOSE OF THE STUDY: The purpose of this work was to describe the posterior ankle impingement syndrome and to present a retrospective analysis of results after surgical treatment in 21 patients with a mean five years follow-up. MATERIAL AND METHODS: Twenty-one patients with a posterior ankle impingement syndrome underwent surgery between 1991 and 1999. There were 17 men and four women, mean age 33 years (18-45); 71% practiced sports, half at the competition level. For 71% of the patients, there was an acute fracture with nonunion of the posterior process of the talus; a microtrauma context was identified in 29%. The physical examination revealed pain at passive forced plantar flexion in 94% of patients with limping during exercise in 88%. Plain x-rays showed a long tail on the talus in 87% of the patients, a short tail in 9%, and a trigone bone in 4%. The posterior malleolus (or third tibial malleolus) was remodeled in 9%. Other examinations performed preoperatively completed the topographic analysis: 99Tc bone scintigraphy, computed tomography with 2D reconstruction and horizontal slices, MRI. The patients were placed in the ventral prone position for surgery via a para-achilles approach, medial in ten patients and lateral in eleven. Bone resection with combined arthrolysis of the subtalar and tibiotalar joints was performed in 20 patients (17 with nonunion of the posterior talar process, one with a trigone bone, two with malformed callus of the posterior malleolus). A soft tissue procedure was also performed in three patients (resection of a synovial cyst in one, tenosynovectomy of the long flexor of the great toe in two). RESULTS: All patients were reviewed clinically and radiographically (plain x-rays). The AOFAS score was determined. There were no cases of infection. Mean follow-up was five years (range 3-10). Results were excellent with a mean Kitaoka score of 90/100, varying with cause and type of procedure performed. Only one patient was dissatisfied (Kitaoka score 67/100); this patient presented residual dysesthesia in the territory of the posterior tibial nerve. In 90% of the patients, there was no sign of degeneration of the peritalar joints (two patients exhibited minimal remodeling of the posterior subtalar joint). 90% of the patients were satisfied or very satisfied. DISCUSSION: The posterior ankle impingement syndrome includes several pathological entities with similar clinical expression. It involves both bony and soft tissue elements in the posterior peritalar region. Repeated or acute forced plantar flexion is the main cause. Complementary explorations (bone scintigraphy, CT, MRI) besides standard radiography, are indispensable to obtain a definitive diagnosis and demonstrate the functional and mechanical impairment. Surgical treatment is simple via a posterior approach (posterolateral or posteromedial)) and in our hands has provided very good results without arthritic consequences at mid-term.

Adolescent↗
PubMed2003

[Evaluation of a long-distance data transmission network in foot and ankle surgery].

PURPOSE OF THE STUDY: This prospective work was designed to evaluate the concordance of the opinions of four experts interrogated via a long-distance inter-hospital data transmission system by an orthopedic surgeon seeking advise on foot and ankle surgery patients. MATERIAL AND METHODS: The surgeon requested advice concerning patients presenting difficult diagnostic or therapeutic situations. The requests were submitted via email to four experts working in regional referral centers. A standardized method defined by pathological categories was used for case description and imaging. RESULTS: Requests concerning 30 among 450 patients presenting surgical foot and ankle disorders were addressed to the experts. The surgical problem involved the forefoot (46%), the mid foot (16%), the hind foot (7%) and the ankle (31%). Mean delay to response was 11 days. The index of diagnostic agreement was 3.2/4 and the index of therapeutic agreement was 2.6/4. DISCUSSION: This study was designed to analyze the operating procedures involved (respective responsibility of the requesting surgeon and the regional experts, remuneration due to the different participants) and the potential patient benefit. The appropriateness of the email transmission system was also examined. For this type of study, email transmission was indicated because of the low cost, easy use, and image quality. This work illustrated the very good diagnostic and therapeutic concordance between experts in foot and ankle surgery and thus demonstrated the potential usefulness of long-distance expert systems. Furthermore, implication of several experts provided greater precision and complementary information facilitating management of difficult cases.

Adult↗
PubMed1997

Reconstruction of the lateral ankle ligaments using an inferior extensor retinaculum flap.

The aim of this study was to assess the results of 32 cases of chronic ankle instability. These were treated by ligament shortening and reinforced with an inferior extensor retinaculum flap. All patients complained of persistent functional instability unrelieved with proprioceptive exercises. Results were assessed clinically (pain, instability, recovery of sports activity, mobility) and radiologically (correction of laxity on stress x-rays). This enabled us to draw up a revision score on a scale of 100 points. We obtained a mean score of 86.7 points (45-100 points), and subjective results showed that 88% of the patients were satisfied with the surgery.

Adolescent↗
PubMed1997

[Biomechanical comparative study of three types of osteosynthesis in the treatment of supra and intercondylar fractures of the humerus in adults].

PURPOSE OF THE STUDY: Supra and intercondylar fractures are the most common fractures of the distal end of the humerus in adult. An osteosynthesis consisting of a plate is the treatment of choice. But location and type of plate always remain open for debate. The authors present the results of an in vitro biomechanical study, which compared the stiffness of three types of osteosynthesis commonly used in these fractures. MATERIAL AND METHODS: The devices were on one hand the premolded lateral plate of Lecestre and Dupont (Howmedica) used alone or in conjunction with a medial 1/3 tubular plate of the AO group, and on the other hand a posterior plate, of which we are developing a new model, the Lambda plate (Protek) "Y"-shaped, monoblock, flat and molded on the humerus during operation. The study compared these different methods of fixation on fresh human humeri. In a first part, the posterior plate was compared to the single lateral one; in a second part, the posterior plate was compared to the coupled lateral and medial plates. The three plates were made of identical material. Both studies used eight pairs of bones with supra and intercondylar fractures realized by sawing. Each bone of a pair was fixed with one of the two types of device. Each humerus underwent different loading forces; sagittal bending (anterior and posterior) and torsion. The displacements were recorded using a calibrated measuring device coupled to two displacement sensors. The stiffness was calculated on force/displacement curves. RESULTS: In anterior bending, the Lambda posterior fixation was significantly stiffer than the single lateral one (p < 0.05) (239 +/- 109 versus 129 +/- 65 N/mm), and was not significantly different of the bilateral fixation (229 +/- 93 versus 224 +/- 108 N/mm). In posterior bending, the mean stiffness of the Lambda fixation was not significantly different to that of the lateral fixation (91 +/- 27 versus 91 +/- 52 N/mm), and less than that of the bilateral one (130 +/- 39 versus 170 +/- 70 N/mm), but not significantly. In torsion the mean stiffness of the Lambda fixation was superior to that of the lateral one (146.75 +/- 50.66 versus 119.75 +/- 58.8 Nm/rad), and bilateral one (233.31 +/- 107.47 versus 212.31 +/- 113.55 Nm/rad), but again not significantly. DISCUSSION: The ideal osteosynthesis for the fractures of the humeral distal doesn't exist, because the bone undergoes antero-posterior and posteroanterior cyclical forces during elbow flexion. Therefore the best device should be placed on both sides of the bone, but anatomical reasons make this location impossible. According to our study, we think the "less worst" device is the posterior one using the Lambda plate. Its symmetrical design allows a best loading distribution on the two columns. Its thickness compensates for its posterior location and the short interval between two holes allows to put many screws (4 to 6) into the epiphysis. All supra and intercondylar fractures, comminuted or not, can be treated with this material. The single lateral device isn't still enough. Its stiffness mainly depends on the orientation of the oblique screw in the medial column. But the design of this column doesn't always allow for an optimal location of the screw, which is the reason of several failures. The bilateral device gives a stiffness, comparable to the posterior one, but doesn't allow as many screws as the Lambda plate in the epiphysis. Therefore, it can't be used in very distal fractures. CONCLUSION: In spite of the progress of the material and the accuracy of the indications, the treatment of supra and intercondylar fractures of the distal end of the humerus is always a difficult problem. The devices have to be as stable as possible to allow an early motion. The best one should be placed on both sides of the distal humerus, because of the sagittal cyclic forces it undergoes, but this location is anatomically impossible. Our study concludes that the device using the Lambda plate i

Biomechanical Phenomena↗
PubMed1995

[The value of combining multiple screwed plates in humeral shaft fractures].

The authors have reviewed 246 fresh fractures of the shaft of the humerus treated by primary plating over a period of 22 years. It has been customary to treat the majority of fractures of the shaft of the humerus by conservative means, with use of open reduction and fixation by a plate for complicated fractures with associated injuries, or in cases of nonunion. Over the period of review the authors have gradually increasing their use of primary plating as opposed to the traditional methods. They fell that the reliability of union, together with the early mobilisation and return of the arm to normal function, favours the use of this method. Their opinion is based on a careful analysis of their results.

Adolescent↗
PubMed1995

[Traumatic luxation of the peroneal tendons. Report of 36 cases].

Between January 1970 and September 1992 we operated on 35 patients with dislocation of the peroneal tendons; in 1 patient both sides were affected. Twelve cases were acute and 24 chronic; 83% were due to injuries at sport, 90% of which were in downhill skiers. In 25 cases the fibroperiosteal detachment and the lax tendon sheath were repaired using either the technique of Meary, or that devised by ourselves. Exner suture of the lesion of the main body of the sheath was carried out in 8 cases, and other procedures in the remainder. Ninety two percent of patients had a satisfactory result. The surgical procedure adopted must depend on the patterns of injury, but the majority of cases require fibroperiosteal release with transosseus reattachment of the sheath.

Acute Disease↗
PubMed1995

Iatrogenic hallux varus surgical procedure: a study of 14 cases.

Hallux varus occurs most frequently as a result of excessive surgical correction of musculoligamentous imbalance around the metatarsophalangeal (MTP) joint of the great toe (lateral release and medial capsuloligamentous tensioning). If untreated, the condition may lead to motion loss and degenerative arthritis. In this series, 14 cases of hallux varus were treated. Medial arthrolysis was done in each case. In five cases, reconstruction of the lateral ligament (with a 1.5-mm Ligapro suture), using a new technique, accompanied the medial release. Arthrodesis of the MTP was done in nine cases treated when there was already stiffness and arthrosis. According to a 100-point scoring system, the results were excellent in 56% and good in 44% of the MTP joint arthrodesis cases. Results were excellent in 100% of the mobilizing technique cases using Ligapro suture.

Adult↗
PubMed1995

[Tibiotarsal arthrodesis: value of external fixator associated with in situ cancellous bone graft. Initial results apropos of 18 cases].

Tibio-talar arthrodesis poses some problems and the most frequent are non-union and varus malalignment of the ankle joint. The aim of this report was to present a new technique of ankle joint arthrodesis. The principles of this procedure are as follows: firstly, the external fixation (A.L.J.) is framed, secondly, perpendicular cuts are made in the tibial plafond and talus through an anterior longitudinal approach; and thirdly, the gap is filled with cancellous bone graft which is taken preferably on the iliac crest. If the back-foot is not correctly lined up preoperatively, the external device is framed in two steps: the first step consists in putting the pins. Then perpendicular cuts are made, and the back-foot is correctly lined up using calcaneal pins. The second step consists in connecting tibial pins and foot pins using union-rods. The last step of the procedure is to fill the gap with cancellous bone graft. The external fixation device is removed after 45 days and a shortleg walking cast is put for 45 days. Between 1981 and 1992, 18 arthrodesis were performed on various diagnosis: 9 post-traumatic tibio-talar osteoarthritis, 4 residual neurologic diseases, 2 rheumatoid arthritis and 3 recent post-traumatic lesions. There were 17 patients (one bilateral case), 4 females and 13 males; the middle age at the time of operation was 44.5 years (20 to 60) and there were 10 right ankles and 8 left. The tibio-talar arthrodesis was performed alone in 14 cases, but it was associated with a talo-calcaneus arthrodesis in 4 cases. The after care was without complications except 3 pins infection which cured with antibiotics. All the cases had a good bony union within 3 to 6 months and the orientation of the backfoot was always satisfactory without varus malalignment. All the patients could put one's shoes without having recourse to orthopaedic shoes. In conclusion, this operative procedure seems to minimize the problems and pittfalls of the ankle arthrodesis.

Adult↗
PubMed1990

[Value of Illizarov's method in the treatment of long bone pseudarthrosis. Apropos of a A.S.A.M.I.F series of 87 cases].

This study is the outcome of multicenter endeavour compiling 87 cases of pseudoarthrosis managed according to principles set forth by G.A. Ilizarov. All clinical forms are described: simple pseudoarthrosis (non-infected and without loss of substance); septic pseudoarthrosis; pseudoarthrosis with loss of bone substance, both septic and aseptic. This method is used in the majority of cases. This method is used in the majority of cases after several consecutive unavailing attempts with conventional therapeutical procedures. Considering all situations, the lesions heal in over 90% of cases and the infection subsides with an equal rate of success. Such results are achieved within a period of 5 months. Sequelae or complications imputable to the method are few. Indications are specified, which depend upon the clinical form of the treated pseudoarthrosis, as well as upon the surgeon's personal skill.

Adolescent↗