G. Ducrot’s research while affiliated with Centre d’Investigation Clinique des Hôpitaux Universitaires de Strasbourg and other places

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Publications (15)


Frattura del femore distale nell’adulto
  • Article

December 2013

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234 Reads

EMC - Tecniche Chirurgiche - Chirurgia Ortopedica

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G. Ducrot

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Le fratture del femore distale sono rare e gravi, con un significativo tasso di mortalità nelle persone anziane. La frequenza stimata è dello 0.4%. Il contesto tipico è di un trauma ad alta energia in un paziente giovane e di un incidente domestico in una persona anziana. In termini di incidenza, la predominanza è femminile e la popolazione interessata è sempre più anziana. Nella maggior parte dei casi la causa è un trauma indiretto su un ginocchio in flessione. Più raramente, si tratta di un trauma diretto da schiacciamento. La scomposizione è conseguente alle trazioni muscolari: accorciamento ed estensione del frammento distale. L’anatomia del femore distale spiega i tre tipi di fratture osservati: sovracondiloidea, unicondiloidea, sotto- e intercondiloidea. Tenuto conto di questa situazione anatomica, solo il trattamento chirurgico permette una stabilizzazione adeguata a opporsi alle forze statiche e dinamiche. Di fronte a pazienti costretti a letto e/o in caso di fratture non o poco scomposte in pazienti con stato di autonomia estremamente ridotto, il trattamento ortopedico deve restare un’eccezione. Dopo aver spiegato in dettaglio le vie di accesso e l’installazione, saranno descritte le tecniche chirurgiche (lama-placca, placca condiloidea, placca bloccata, inchiodamento endomidollare) insistendo sulle loro specificità. Sarà proposta una panoramica della letteratura recente con l’obiettivo di confrontare i risultati delle diverse tecniche.


Fracturas del extremo distal del fémur en el adulto

December 2013

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81 Reads

EMC - Técnicas Quirúrgicas - Ortopedia y Traumatología

Las fracturas del fémur distal son poco frecuentes y graves, con una mortalidad importante en ancianos. La frecuencia se estima en un 0,4%. El contexto habitual es un traumatismo de alta energía en el paciente joven y un accidente doméstico en la persona mayor. La proporción por sexos se modifica, con un predominio femenino conforme la población afectada es de mayor edad. El mecanismo más habitual es un traumatismo indirecto sobre una rodilla en flexión. Con menos frecuencia, se trata de un traumatismo directo por aplastamiento o atropello. El desplazamiento es secundario a las tracciones musculares: acortamiento y extensión del fragmento distal. La anatomía del fémur distal explica los tres tipos de fracturas que se observan: supracondílea, unicondílea, supra e intercondílea. Teniendo en cuenta esta situación anatómica, únicamente el tratamiento quirúrgico permite una estabilización suficiente que se oponga a las fuerzas estáticas y dinámicas. Por lo tanto, el tratamiento ortopédico conservador debe ser excepcional, reservado para pacientes postrados en la cama y/o para fracturas nada o poco desplazadas en pacientes con una autonomía extremadamente reducida. Inicialmente se detallarán las vías de acceso y las colocaciones y, posteriormente, se describirán las técnicas quirúrgicas (clavo-placa, placa condílea, placa de bloqueo, enclavado), insistiendo en las características específicas de cada una de ellas. Se ofrecerá una visión general de la literatura reciente con el objetivo de comparar los resultados de diferentes técnicas radioclínicas.


Résultats des ostéosynthèses par plaques des fractures de l’humérus distal du sujet de plus de 65 ans

November 2013

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43 Reads

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2 Citations

Revue de Chirurgie Orthopédique et Traumatologique

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G. Ducrot

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[...]

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Introduction Les fractures de l’extrémité distale de l’humérus du sujet âgé sont souvent complexes et difficiles à prendre en charge. Le but de cette étude est de rapporter les résultats d’une série multicentrique d’ostéosynthèses de fracture de la palette humérale du sujet âgé de type A-B et C de la classification de l’AO, pour identifier les bénéfices et pièges des différents types de montage. Patients et méthodes Deux études ont été menées : une étude multicentrique prospective qui a permis d’inclure 53 patients et une étude multicentrique rétrospective avec 289 patients, tous âgés de plus de 65 ans avec une fracture récente de la palette humérale. Les patients ont été évalués cliniquement (antécédents, état général, amplitudes articulaires, le Mayo Elbow Performance Score (MEPS), et radiologiquement (type de fracture, consolidation ou non de la fracture, présence d’un cal vicieux ou non, status du matériel). Résultats Les résultats cliniques et fonctionnels évalués à l’aide du MEPS sont relativement satisfaisants : avec une moyenne à 92 points pour les type A, 82 points pour les type B et 88 points pour les type C. Dans les deux séries, ce sont les fractures de type B qui ont été les plus difficiles à traiter et qui ont donné les moins bons résultats cliniques, fonctionnels et radiologiques. Les complications étaient surtout liées aux fractures de type C ; il s’agissait principalement de lésions neurologiques et de démontages/pseudarthrose. Discussion Bien qu’il s’agisse de fractures difficiles à traiter avec un taux de complication non négligeable, la récupération fonctionnelle s’est fait de façon assez satisfaisante. Il s’agit d’une chirurgie difficile dont l’une des composantes majeures reste le niveau d’ostéoporose des patients qu’il convient d’analyser finement pour poser éventuellement l’indication d’une arthorplastie totale de coude. Niveau de preuve IV.


Outcomes of distal humerus fractures in patients above 65 years of age treated by plate fixation

October 2013

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91 Reads

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49 Citations

Orthopaedics & Traumatology Surgery & Research

Distal humerus fractures in elderly patients are often complex fractures that are difficult to treat. The goal of this study was to report on the results of a multicentre series of internal fixation of AO type A, B and C distal humerus fractures in elderly patients and to identify the pros and cons of various fixation constructs. Two studies were performed. One was a prospective multicentre study with 53 patients and the other was a retrospective multicentre study with 289 patients, all above 65 years of age and with a recent distal humerus fracture. Patients were evaluated based on clinical criteria (history, health condition, joint range of motion, Mayo Elbow Performance Score) and radiological criteria (fracture type, union of fracture, presence of malunion, hardware condition). Based on the MEPS, the clinical and functional results were relatively satisfactory: average of 92 points for type A, 82 points for type B and 88 points for type C. In both series, type B fractures were the most difficult to treat and had less good clinical, functional and radiological outcomes. Most of the complications occurred with type C fractures; these consisted mainly of nerve injuries and fixation failure/non-union. Although these fractures are difficult to treat and have an appreciable number of complications, the functional recovery was fairly satisfactory. One of the most challenging aspects of surgical treatment is the existence of osteoporosis in these patients. This must be carefully analysed to determine if an indication exists for total elbow arthroplasty. LEVEL OF EVIDENCE: IV.


Ostéosynthèse mini-invasive des fractures fémorales inter-prothétiques de type B et C

September 2013

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17 Reads

Revue de Chirurgie Orthopédique et Traumatologique

Les fractures fémorales inter-prothétiques sont rares, et leur traitement est discuté notamment sur la longueur de l’ostéosynthèse. L’apport des plaques verrouillées par voie mini-invasive est peu connu et peut contribuer à améliorer le taux de succès de l’ostéosynthèse.


Minimally invasive fixation of type B and C interprosthetic femoral fractures

June 2013

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53 Reads

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42 Citations

Orthopaedics & Traumatology Surgery & Research

Introduction: Interprosthetic femoral fractures are rare and raise unresolved treatment issues such as the length of the fixation material that best prevents secondary fractures. Awareness of the advantages of locked-plate fixation via a minimally invasive approach remains limited, despite the potential of this method for improving success rates. Hypothesis: Femur-spanning (from the trochanters to the condyles) locked-plate fixation via a minimally invasive approach provides high healing rates with no secondary fractures. Materials and methods: From January 2004 to May 2011, all eight patients seen for interprosthetic fractures were treated with minimally invasive locked-plate fixation. Mean time since hip arthroplasty was 47.5 months and mean time since knee arthroplasty was 72.6 months. There were 12 standard primary prostheses and four revision prostheses; 11 prostheses were cemented and a single prosthesis showed femoral loosening. Classification about the hip prostheses was Vancouver B in one patient and Vancouver C in seven patients; about the knee prosthesis, the fracture was SoFCOT B in three patients and SOFCOT C in five patients, and a single fracture was SoFCOT D. Minimally invasive locking-plate fixation was performed in all eight patients, with installation on a traction table in seven patients. Results: Healing was obtained in all eight patients, after a mean of 14 weeks (range, 12-16 weeks). One patient had malalignment with more than 5° of varus. There were no general or infectious complications. One patient died, 32 months after surgery. The mean Parker-Palmer mobility score decreased from 6.2 pre-operatively to 2.5 at last follow-up. Early construct failure after 3 weeks in one patient required surgical revision. There was no change in implant fixation at last follow-up. No secondary fractures were recorded. Discussion: In patients with type B or C interprosthetic fractures, femur-spanning fixation not only avoids complications related to altered bone stock and presence of prosthetic material, but also decreases the risk of secondary fractures by eliminating stress riser zones. The minimally invasive option enhances healing by preserving the fracture haematoma. Thus, healing was obtained consistently in our patients, with no secondary fractures, although the construct failed in one patient. Level of evidence: Level IV.



Fractures du fémur distal : technique chirurgicale et revue de la littérature

May 2013

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91 Reads

Revue de Chirurgie Orthopédique et Traumatologique

Les fractures du fémur distal sont des fractures rares et graves. La fréquence est estimée à 0,4 % avec une épidémiologie qui évolue : la classique répartition bimodale persiste avec un pic de fréquence chez l’homme trentenaire et un pic chez la femme âgée, mais il apparaît une prédominance féminine et un vieillissement avec plus de 50 % des patients qui ont plus de 65 ans. Le mécanisme est le plus souvent un traumatisme indirect sur un genou en flexion, plus rarement un traumatisme direct par écrasement. L’anatomie du fémur distal explique les trois grands types de fracture. Compte tenu de ces considérations anatomiques, seul un traitement chirurgical est indiqué pour stabiliser la fracture. Le traitement orthopédique est exceptionnel. Le but de ce travail est de faire l’état de l’art actuel sur les différentes solutions chirurgicales pour la prise en charge de ces fractures en précisant les spécificités techniques. Les données radiocliniques et biomécaniques récentes de la littérature sont rapportées permettant la comparaison des montages.


Traitement des fractures de l’humérus distal par plaque verrouillée LCP DHP™ chez les sujets de plus de 65 ans

April 2013

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76 Reads

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2 Citations

Revue de Chirurgie Orthopédique et Traumatologique

Les fractures de la palette humérale sont délicates à traiter du fait de leur fréquente complexité. Face à une population âgée présentant un os fragile et porotique, la tenue du matériel est essentielle pour autoriser une mobilisation précoce, gage du résultat fonctionnel, et pour diminuer les complications mécaniques. Les implants verrouillés répondent à ce cahier des charges. Nous rapportons ici les résultats d’une série homogène de patients de plus de 65 ans présentant une fracture de l’humérus distal ostéosynthésée par plaque LCP DHP™ (Synthès®) dans l’objectif d’évaluer l’efficacité et les limites de ce traitement.


Distal femur fractures. Surgical techniques and a review of the literature

March 2013

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723 Reads

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205 Citations

Orthopaedics & Traumatology Surgery & Research

Fractures of the distal femur are rare and severe. The estimated frequency is 0.4% with an epidemiology that varies: there is a classic bimodal distribution, with a frequency peak for men in their 30s and a peak for elderly women; however, at present it is found predominantly in women and in the elderly with more than 50% of patients who are over 65. The most common mechanism is an indirect trauma on a bent knee, and more rarely direct trauma by crushing. The anatomy of the distal femur explains the three major types of fracture. Because of the anatomy of the distal femur, only surgical treatment is indicated to stabilize the fracture. A non-surgical treatment is a rare option. The aim of this report was to provide an update on the existing surgical solutions for the management of these fractures and describe details of the surgical technique applicable to these injuries. Recent radiological, clinical and biomechanical data published in the literature are reported to compare different surgical options.


Citations (6)


... A treatment algorithm was suggested for this classification based on the results of previously published studies regarding the surgical treatment of distal humeral fractures (Fig. 2). 2,6,7,11,13,14,20 The suggested treatment algorithm reflects the current approach to managing these fractures in our department. ...

Reference:

The Copenhagen Classification System for Distal Humeral Fractures is useful to identify patients who may require treatment with hemi- or total elbow arthroplasty
Outcomes of distal humerus fractures in patients above 65 years of age treated by plate fixation
  • Citing Article
  • October 2013

Orthopaedics & Traumatology Surgery & Research

... Leur prise en charge doit être rapide et demeure difficile en raison de leur complexité anatomique mais aussi en raison des exigences thérapeutiques que sont la restauration de l'interligne articulaire et l'autorisation d'une mobilisation immédiate du coude [4]. La difficulté réside aussi dans la commination osseuse et dans la qualité porotique de l'os notamment chez le sujet âgé [5,6]. La chirurgie est le traitement privilégié de ces lésions et l'ostéosynthèse de ces lésions exige une grande stabilité du montage pour limiter le risque de complications [7,8]. ...

Traitement des fractures de l’humérus distal par plaque verrouillée LCP DHP™ chez les sujets de plus de 65 ans
  • Citing Article
  • April 2013

Revue de Chirurgie Orthopédique et Traumatologique

... The longer plate with an attachment plate may have increased the number of cortices of purchase in the both proximal and distal fragments. Several studies supported the necessity for longer plates, reporting that sufficient fixation in the proximal and distal portions of the fracture site spanning the prosthesis might be mandatory [25,26]. The longer plate length is an important factor for stable fixation, as it increases the lever arm and the pull-out strength, preventing the failure of implant fixation such as pulled-out screws or cable breakage. ...

Minimally invasive fixation of type B and C interprosthetic femoral fractures
  • Citing Article
  • June 2013

Orthopaedics & Traumatology Surgery & Research

... Over time, the surgical management of femoral shaft fractures has evolved considerably [5]. Closed intramedullary interlocking nailing has emerged as the gold standard due to its biomechanical stability, minimally invasive nature, high union rates, and facilitation of early mobilization [6]. ...

Distal femur fractures. Surgical techniques and a review of the literature
  • Citing Article
  • March 2013

Orthopaedics & Traumatology Surgery & Research

... Depending on the absence or presence of posterior condylar comminution these fractures were further characterized into A and B [9]. Fractures of the humerus lateral condyle represent a unique and relatively uncommon (<2%) subset of elbow injuries, particularly in the elderly population [10]. The lateral condyle, a critical bony prominence, plays a crucial role in maintaining joint stability and facilitating the intricate movements of the upper extremity. ...

Treatment of distal humerus fractures with LCP DHP (TM) locking plates in patients older than 65 years
  • Citing Article
  • February 2013

Orthopaedics & Traumatology Surgery & Research

... Of the 873 TEAs included, 74,8% was implanted in female and 25,2% in male with a mean age at surgery of 62,8 years (range, 31-80). Concerning the indications, the most represented group was the rheumatoid arthritis (RA) (N = 610, 69,9%) [20][21][22][23][24][25] followed by post traumatic sequelae (PTS) (n = 106, 12,1%) [19,[26][27][28] and acute fractures (FR) (n = 105, 12,1%) [8,19,[29][30][31][32]. Tumours (K) (n = 21, 2,4%) [33], primary osteoarthritis (OA) (n = 18, 2,1%) [34], and haemophilia (HE) (n = 13, 2%) [35] were the least represented groups, with each group being described in only one article. ...

Complex distal humerus fracture in the elderly: Is primary total elbow arthroplasty a valid treatment alternative? A series of 20 cases
  • Citing Article
  • December 2012

Orthopaedics & Traumatology Surgery & Research