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  • 1
    Electronic Resource
    Electronic Resource
    Microsurgical anterior decompression and internal fixation with iliac bone graft and titanium plates for treatment of cervical intervertebral disc herniation (1995)
    Springer
    Acta neurochirurgica 134 (1995), S. 207-213 
    Details
    ISSN: 0942-0940
    Keywords: Anterior cervical surgery ; cervival disc disease ; fusion ; internal fixation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary 42 cervical interbody fusions with iliac bone graft and titanium plate fixation were performed between October 1991 and March 1994. The mean follow up period in this study was 10.7 months. In 32 cases fusion was done for 1 and in 10 cases for 2 segments. 2 different types of plates were used. In 25 cases micro-osteosynthesis plates and screws with 2.7 mm diameter were used, and in 17 cases cervical H-plates and screws with 3.5mm diameter. A favourable outcome was achieved in 31 of 42 cases (74%). Satisfactory pain relief was achieved in 90%. For radicular motor deficit good results were obtained in 84% and for cervical myelopathy in 54%. The 2 different types of plates showed a remarkable difference in the clinical outcome. The results were regarded favourable in 15 of 25 microplate fusions (60%) and in 16 of 17 H-plate fusions (94%). Compression of the bone graft was seen in 5 patients of the micro plate group, however, radiological signs for fusion were present in all 42 cases at follow up. Major surgical complications, damage to neural structures or neurological deterioration did not occur in this study. Plate fixation in cervical interbody fusions seems to be a safe procedure and may reduce graft related complications at the fusion site if the plates and screws are sufficiently well proportioned. A favourable impact upon the results for cervical interbody fusion might be expected and should be further investigated in a long term follow up study.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01417691
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  • 2
    Electronic Resource
    Electronic Resource
    Footdrop as an Initial Manifestation of an Intramedullary Metastatic Bronchial Carcinoma (1998)
    Springer
    Acta neurochirurgica 140 (1998), S. 1315-1316 
    Details
    ISSN: 0942-0940
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s007010050257
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  • 3
    Electronic Resource
    Electronic Resource
    Noncontiguous Spinal Metastases and Plasmocytomas Should be Operated on Through a Single Posterior Midline Approach, and Circumferential Decompression Should be Performed with Individualized Reconstruction (2000)
    Springer
    Acta neurochirurgica 142 (2000), S. 1219-1230 
    Details
    ISSN: 0942-0940
    Keywords: Keywords: Spinal neoplasm; epidural metastases; vertebrectomy; spinal instrumentation.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary  Background. In noncontiguous spinal metastatic disease, anterior or combined anterior-posterior surgery is an effective treatment. The objective of this study is to investigate whether circumferential decompression through a single-stage posterior midline approach with individualized spinal reconstruction can still achieve comparable results for functional improvement and for maintenance of spinal alignment in the absence of the risks associated with the more invasive transcavitary or combined approaches.  Method. Seventeen patients with noncontiguous spinal metastases and plasmocytomas at one or two adjacent levels were included in this series. Circumferential decompression was obtained with anterior reconstruction and posterior fixation in ten patients, and with posterior instrumentation alone in seven patients. Postoperatively the patients were prospectively followed, and their functional status and spinal alignment were periodically evaluated.  Findings. Fourteen patients died from progression of their underlying cancer. Their mean survival time was 8 months (range: 1 to 21 months). Three survivors were evaluated at 10, 4 and 3 months respectively. At one month after surgery, 14 patients (82%) showed neurological improvement. Of 10 preoperative nonambulators, seven regained walking capacity. Five patients who were ambulatory with assistance improved to full functional independence. Local tumour recurrence was recorded in one patient after subtotal vertebrectomy for a plasmocytoma at L5. No other tumour recurrences were noted. In one patient a partial loss of correction occurred at T6 – without functional deterioration, however. Spinal alignment was maintained in all other patients who became or remained ambulatory. No major intra-operative complications or peri-operative deaths occurred. CSF leakage was recorded as the most common complication in four patients.  Interpretation. Circumferential decompression and spinal reconstruction through a single-stage posterior midline approach is feasible and effective. The extent of surgery can be individualized by means of this technique to the patient's specific problem. In patients with limited life expectancy from metastatic neoplastic disease, the results compare favourably with the more invasive anterior or combined antero-posterior procedures.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s007010070018
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  • 4
    Electronic Resource
    Electronic Resource
    Metatarsalgie (2000)
    Springer
    Der Orthopäde 29 (2000), S. 470-478 
    Details
    ISSN: 1433-0431
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Die dorsale atraumatische Dislokation im Metatarsophalangealgelenk wurde erstmals 1937 von Branch publiziert [3]. Die allgemein anerkannte Ursache ist eine muskuläre Imbalance zwischen der Beuge- und Streckmuskulatur im MPT-Gelenk, da die Streckmuskulatur an der Grundphalanx der Zehe nicht ansetzt. Diese Imbalance ist ein Resultat der Überdehnung oder Ruptur der plantaren Platte bedingt durch Überlänge des Mittelfußknochens, Verdrängung durch einen gleichzeitig bestehenden Hallux valgus oder Hammerzehenfehlstellung bei zu kurzen Schuhen. Verschiedenste Methoden zur Korrektur des subluxierten oder dislozierten Metatarsophalangealgelenks wurden beschrieben. Man kann grundsätzlich zwischen simplen Weichteileingriffen mit postoperativ temporärer Bohrdrahttransfixation [4, 19], der Arthroplastik mit Resektion der Basis der Grundphalanx der Zehe [7] oder des Metatarsalköpfchens [5, 8, 9, 19] oder dem Gelenkersatz aus Silikon [6] unterscheiden. Helal verzeichnete 1975 teilweise Erfolge mit seiner subkapitalen extraartikulären Osteotomie [10]. Das Ziel dieser Arbeit ist es, die gängigen operativen Techniken zu vergleichen und ein Therapiekonzept vorzustellen.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001320050469
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  • 5
    Electronic Resource
    Electronic Resource
    Stenoses of the first segment of the vertebral artery: difficulties in angiographic diagnosis (1996)
    Springer
    Neuroradiology 38 (1996), S. 6-10 
    Details
    ISSN: 1432-1920
    Keywords: Vertebral artery ; Angiography ; Vertebrobasilar insufficiency
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Pathology at the origin of the vertebral artery may be the cause of incapacitating vertebrobasilar insufficiency (VBI). Preoperative diagnosis is made primarily on angiographic criteria. We compared intraoperative and angiographic findings in 30 patients and found important diagnostic discrepancies in patients with a caudal, ventral or dorsal origin of the vertebral artery. In their angiograms, vessel superimposition led us to over look 3 ostial stenoses and 10 stenoses due to kinking. Angiographic assessment of patients with VBI can be difficult. Adequate visualisation of the origin of the vertebral artery is mandatory for accurate diagnosis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00593205
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  • 6
    Electronic Resource
    Electronic Resource
    Stenoses of the first segment of the vertebral artery: difficulties in angiographic diagnosis (1995)
    Springer
    Neuroradiology 38 (1995), S. 6-10 
    Details
    ISSN: 1432-1920
    Keywords: Key words Vertebral artery ; Angiography ; Vertebrobasilar insufficiency
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Pathology at the origin of the vertebral artery may be the cause of incapacitating vertebrobasilar insufficiency (VBI). Preoperative diagnosis is made primarily on angiographic criteria. We compared intraoperative and angiographic findings in 30 patients and found important diagnostic discrepancies in patients with a caudal, ventral or dorsal origin of the vertebral artery. In their angiograms, vessel superimposition led us to over look 3 ostial stenoses and 10 stenoses due to kinking. Angiographic assessment of patients with VBI can be difficult. Adequate visualisation of the origin of the vertebral artery is mandatory for accurate diagnosis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00593205
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  • 7
    Electronic Resource
    Electronic Resource
    CT-unterstützte Definition von Einstichstelle und Penetrationswinkel für die perkutane lumbale Diskektomie (1996)
    Springer
    Der Radiologe 36 (1996), S. 700-704 
    Details
    ISSN: 1432-2102
    Keywords: Schlüsselwörter Computertomographie ; Lumbaler Bandscheibenvorfall ; Minimal-invasive Chirurgie ; Perkutane Diskektomie ; Wirbelsäule ; Key words CT ; Lumbar disk herniation ; Minimally invasive surgery ; Percutaneous diskectomy ; Spine
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary In 20 consecutive patients submitted to CT evaluation of a suspected disk protrusion at level L4-5, CT measurements to define entry point and penetration angle for percutaneous diskectomy were performed. It was shown that in order to reach the disk center, the entry point had to be more lateral than recommended by most authors. Body height, weight and body surface area were not significantly correlated to entry point position or penetration angle. In particular, the extension of the intervertebral facet joint determined the route of the probe to the disk center. Therefore CT-assisted planning of the instrument route prior to percutaneous lumbar diskectomy is helpful in defining the proper entry point and penetration angle for safe and effective instrument positioning.
    Notes: Zusammenfassung Aus den Daten von 20 aufeinanderfolgenden CT-Untersuchungen zur Abklärung eines Bandscheibenvorfalls in Höhe L4/5 wurden Messungen zur Bestimmung von Einstichstelle und Penetrationswinkel für eine perkutane Diskektomie durchgeführt. Es konnte gezeigt werden, daß die Einstichstelle weiter lateral definiert werden muß als von den meisten Autoren in der Literatur angegeben wird, um den Zielpunkt im Zentrum der Bandscheibe erreichen zu können. Dabei fand sich keine signifikante Korrelation zwischen Körpergröße, Gewicht oder Körperoberfläche und Position der Einstichstelle oder Penetrationswinkel. Der Weg der Punktionskanüle zum Zentrum der Bandscheibe wird vor allem durch die Ausdehnung der kleinen Wirbelgelenke (Articulationes zygapophyseales) bestimmt. Es erscheint daher vor Durchführung einer perkutanen Diskektomie eine CT-unterstützte Planung zur exakten Definition von Einstichstelle und Penetrationswinkel und zur sicheren effektiven Positionierung der Instrumente empfehlenswert.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001170050130
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  • 8
    Electronic Resource
    Electronic Resource
    Measurement of the breakup channels in nuclear muon capture by3He and4He (1996)
    Springer
    Hyperfine interactions 101-102 (1996), S. 423-427 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The rates of the breakup reactions λB(3He) and λB(4He) in nuclear muon capture by3He and4He have been measured. The measurements were performed on the muon beam of PSI with a multi-anode high-pressure ionization chamber filled with isotopically pure3He or4He at 120 bar. The chamber was used as a target and detector for both the incoming muons and for the charged reaction products (tritons, deuterons and protons) of the breakup reactions ΛB(3He) and ΛB(4He). Our statistics, about 5 × 105 of breakup events, provides a possibility to improve the precision of evaluated rates. The preliminary results: λB(3He)=720 ± 70 s−1, λB(4He)=415 ± 40 s−1 are compared to theoretical predictions and to previous experiments.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02227651
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  • 9
    Electronic Resource
    Electronic Resource
    Experiments with low-energy muons (1996)
    Springer
    Hyperfine interactions 101-102 (1996), S. 623-632 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Two experiments with low-energy muons are described: the determination of the stopping power of C, Si, Ti and Au for muons at energies down to 2 keV and the measurement of the diffusion times for pµ and dµ atoms in low-pressure (0.25–12 hPa) hydrogen gas. A pronounced Barkas effect was found for muons at the Bragg peak (about 10 keV): the stopping power for µ− in C, e.g., is about 30% lower than that for µ+. The mean kinetic energy of pµ atoms at the end of the cascade in 1 hPa hydrogen gas was determined to be (2.6 ± 0.6) eV (preliminary value).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02227675
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  • 10
    Electronic Resource
    Electronic Resource
    Insights on d μ t sticking from d μ d stripping and μ,3He capture (1999)
    Springer
    Hyperfine interactions 118 (1999), S. 197-202 
    Details
    ISSN: 1572-9540
    Keywords: muon catalyzed fusion ; sticking ; stripping
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Data from the recent PSI high statistics experiment on d μ d fusion are used to measure the stripping process in d μ d→ n+μ,3He and test current calculations of the stripping process. The PSI results in μ3He capture are also used to remove a troubling background from this measurement. Combination of these results with the old dμ t sticking analysis slightly raise and improve that result to ωs= (0.58± 0.04)% and indicate that theory and experiment can meet if theoretical stripping is increased only at the beginning of the track. This conclusion is in accord with the new stripping calculations where excited state stripping is increased significantly.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1012617510278
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