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您的检索式：作者名="Hans Polzer"
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| 1 | Neurovascular complications due to the Hippocrates method for reducing anterior shoulder dislocations显示文摘In spite of the fact that the Hippocrates method hardly has been evaluated in a scientific manner and numerous associated iatrogenic complications have been reported, this method remains to be one of the most common techniques for reducing anterior shoulder dislocations. We report the case of a 69-year-old farmer under coumarin anticoagulant therapy who sustained acute first time anterior dislocation of his dominant right shoulder. By using the Hippocrates method with the patient under general anaesthesia, the brachial vein was injured and an increasing hematoma subsequently caused brachial plexus paresis by pressure. After surgery for decompression and vascular suturing, symptoms declined rapidly, but brachial plexus paresis still was not fully reversible after 3 mo of follow-up. The hazardousness of using the Hippocrates method can be explained by traction on the outstretched arm with force of the operator's body weight, direct trauma to the axillary region by the physician's heel, and the topographic relations of neurovascular structures and the dislocated humeral head. As there is a variety of alternative reduction techniques which have been evalu-ated scientifically and proofed to be safe, we strongly caution against the use of the Hippocrates method as a first line technique for reducing anterior shoulder dislocations, especially in elder patients with fragile vessels or under anticoagulant therapy, and recommend the scapular manipulation technique or the Milch technique, for example, as a first choice. | Markus Regauer Hans Polzer Wolf Mutschler | 2014 | World Journal of Orthopedics2014，5，1： | 7 |
| 2 | Development of an internally braced prosthesis for total talus replacement显示文摘Total loss of talus due to trauma or avascular necrosis,for example,still remains to be a major challenge in foot and ankle surgery with severely limited treatment options.Implantation of a custom made total talar prosthesis has shown promising results so far.Most important factors for long time success are degree of congruence of articular surfaces and ligamentous stability of the ankle.Therefore,our aim was to develop an optimized custom made prosthesis for total talus replacement providing a high level of primary stability.A custom made hemiprosthesis was developed using computed tomography and magnetic resonance imaging data of the affected and contralateral talus considering the principles and technology for the development of the S.T.A.R.prosthesis(Stryker).Additionally,four eyelets for fixation of artificial ligaments were added at the correspondent footprints of the most important ligaments.Two modifications can be provided according to the clinical requirements:A tri-articular hemiprosthesis or a bi-articular hemiprosthesis combined with the tibial component of the S.T.A.R.total ankle replacement system.A feasibility study was performed using a fresh frozen human cadaver.Maximum range of motion of the ankle was measured and ligamentous stability was evaluated by use of standard X-rays after application of varus,valgus or sagittal stress with 150 N.Correct implantation of the prosthesis was technically possible via an anterior approach to the ankle and using standard instruments.Malleolar osteotomies were not required.Maximum ankle dorsiflexion and plantarflexion were measured as 22-0-28 degrees.Maximum anterior displacement of the talus was 6 mm,maximum varus tilt 3 degrees and maximum valgus tilt 2 degrees.Application of an internally braced prosthesis for total talus replacement in humans is technically feasible and might be a reasonable procedure in carefully selected cases with no better alternatives left. | Markus Regauer Mirjam Lange Kevin Soldan Steffen Peyerl Sebastian Baumbach Wolfgang Bocker Hans Polzer | 2017 | World Journal of Orthopedics2017，8，3： | 4 |
| 3 | Hallux rigidus: Joint preserving alternatives to arthrodesis- a review of the literature显示文摘Hallux rigidus describes the osteoarthritis of the firstmetatarsophalangeal joint. It was first mentioned in 1887. Since then a multitude of terms have been introduced referring to the same disease. The main complaints are pain especially during movement and a limited range of motion. Radiographically the typical signs of osteoarthritis can be observed starting at the dorsal portion of the joint. Numerous classifications make the comparison of the different studies difficult. If non-operative treatment fails to resolve the symptoms operative treatment is indicated. The most studied procedure with reproducible results is the arthrodesis. Nevertheless, many patients refuse this treatment option, favouring a procedure preserving motion. Different motion preserving and joint sacrificing operations such as arthroplasty are available. In this review we focus on motion and joint preserving procedures. Numer-ous joint preserving osteotomies have been described. Most of them try to relocate the viable plantar cartilage more dorsally, to decompress the joint and to increase dorsiflexion of the first metatarsal bone. Multiple studies are available investigating these procedures. Most of them suffer from low quality, short follow up and small patient numbers. Consequently the grade of recommendation is low. Nonetheless, joint preserving procedures are appealing because if they fail to relief the symptoms an arthrodesis or arthroplasty can still be performed thereafter. | Hans Polzer Sigmund Polzer Mareen Brumann Wolf Mutschler Markus Regauer | 2014 | World Journal of Orthopedics2014，5，1： | 0 |
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