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  • 2000-2004  (1)
  • 1995-1999  (5)
  • 1905-1909
  • Hip arthroplasty  (2)
  • Melanoma  (2)
  • elastic instability  (2)
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Material
Years
  • 2000-2004  (1)
  • 1995-1999  (5)
  • 1905-1909
Year
Keywords
  • 1
    Electronic Resource
    Electronic Resource
    Reliability of the Sentinel Node Procedure in Melanoma Patients: Analysis of Failures After Long-Term Follow-Up (2000)
    Springer
    Annals of surgical oncology 7 (2000), S. 461-468 
    Details
    ISSN: 1534-4681
    Keywords: Melanoma ; Sentinel node procedure ; Follow-up ; False-negative ; Success
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Background: The sentinel node (SN) concept assumes that early lymphatic metastases, if present, always are found first in the SN. The aim of this study was to determine the reliability ofthis procedure by establishing the success rate and number of failed procedures during a follow-up period of at least 2 years. Methods: From August 1993 to November 1996, 204 consecutive patients with stage I and II cutaneous melanoma underwent SN biopsy by a triple technique. Preoperatively, all patients underwent (dynamic) lymphoscintigraphy. A gamma probe and blue dye helped localize the SN(s) during surgery, and these nodes subsequently were excised. These lymph nodes were step-sectioned and examined by routine and immunohistochemical staining. If the SN contained tumor cells, a lymphadenectomy was performed at a later date. Results: The median follow-up time was 42 months. The success rate was 99%. Three patients developed a recurrence in the negative SN basin during follow-up, without simultaneous appearance of (locoregional) metastases. Conclusions: With a 99% success rate and a 1.5% rate of failed SN procedures (7% falsenegative rate) after a median follow-up of 3.5 years, we concluded that the combined triple technique approach of detecting the SN was a reliable method to accurately identify and retrieve the SN.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s10434-000-0461-7
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Localizing the sentinel node in cutaneous melanoma: Gamma probe detection versus blue dye (1997)
    Springer
    Annals of surgical oncology 4 (1997), S. 156-160 
    Details
    ISSN: 1534-4681
    Keywords: Melanoma ; Sentinel node ; Gamma detection probe ; Patent blue dye
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Background: Sentinel node (SN) biopsy can be used to select patients with melanoma for therapeutic lymphadenectomy. We investigated the value of two methods to locate the SN: patent blue dye (PBD) and gamma probe detection of99mTc-nanocolloid. Methods: One hundred ten patients with cutaneous melanoma were studied. Lymphoscintigraphy with99mTc-nanocolloid was performed to determine the position of the SN. Before operation, PBD was injected at the same site as the radiopharmaceutical. When a blue node was identified intraoperatively, its radioactivity level was measured with the probe. In the absence of blue coloration, the probe was used to trace the SN. Results: Scintigrams visualized a total of 219 SNs in 141 basins. Eight SNs were not explored. One SN was not found. The remaining 210 and 27 additional intraoperatively identified SNs were excised. From the total of 237 removed SNs, 200 (84%) were found using PBD only. All 37 nodes that were not found with the PBD were localized with the probe so that the probe combined with PBD identified 99.5% of all SNs. In 23 patients the SN contained tumor. In three patients the SN was false-negative for metastasis. Conclusion: The gamma probe together with PBD can identify more SNs (99.5%) than lymphatic mapping with PBD alone (84%).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02303799
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Shear rheology of polymer solutions near the critical condition for elastic instability (1997)
    Springer
    Rheologica acta 36 (1997), S. 97-109 
    Details
    ISSN: 1435-1528
    Keywords: Key words Polymer migration ; anomalous rheology ; Boger fluid ; normal stress ; elastic instability
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Abstract The use of constant viscosity, highly elastic polymer solutions, so called Boger fluids, has been remarkably successful in elucidating the behavior of polymeric materials under flowing conditions. However, the behavior of these fluids is still complicated by many different physical processes occurring within a narrow window of observation time and applied shear rate. In this study, we investigate the long-time shear behavior of an ideal Boger fluid: a well characterized, athermal, dilute, binary solution of high molecular weight polystyrene in oligomeric polystyrene. Rheological measurements show that under an applied steady shear flow, this family of polymer solutions undergoes a transient decay of normal stresses on a timescale much longer than the polymer molecule‘s relaxation time. Rheological and flow visualization results demonstrate that the observed phenomenon is not caused by polymer degradation, phase separation, viscous heating, or secondary flows from elastic instabilities. Although the timescale is much shorter than that associated with polymer migration in the same solutions (MacDonald and Muller, 1996), the appearance of this phenomenon only at the rates where migration has been observed suggests that it may be a prerequisite for observing migration. In addition, we note that through sufficient pre-shearing of the sample, the normal stress decrease suppresses the elastic instability. These results show that there is considerable uncertainty in choosing the appropriate measure of the fluid relaxation time for consistently modeling the critical condition for the elastic instability, the decay of normal stresses, and the migration of polymer species.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00366816
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    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Anatomic basis of the transgluteal approach to the hip-joint by anterior hemimyotomy of the gluteus medius (1997)
    Springer
    Surgical and radiologic anatomy 19 (1997), S. 61-67 
    Details
    ISSN: 1279-8517
    Keywords: Anatomy ; Hip arthroplasty ; Transgluteal approach
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The authors present a study of the intrinsic anatomy of the gluteus medius m. and of its innervation through the caudal branch of the superior gluteal n. The existence of an intramuscular tendon in the thickness of the gluteus medius was constantly prooved in 40 muscles. The relations of the intrinsic fibrous structure of the muscle and its innervation were studied. The authors deduce from that the topography of a gluteus medius incision, with respect to a safety area towards its innervation, which leads to an exposure of the acetabulum that is satisfying and gives opportunities of a sound repair after the surgery of the hip joint through the transgluteal approach. They propose the “anterior hemimyotomy of the gluteus medius m” designation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s00276-997-0061-3
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    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Anatomic basis of the transgluteal approach to the hip-joint by anterior hemimyotomy of the gluteus medius (1997)
    Springer
    Surgical and radiologic anatomy 19 (1997), S. 61-67 
    Details
    ISSN: 1279-8517
    Keywords: Anatomy ; Hip arthroplasty ; Transgluteal approach
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé Les auteurs présentent une étude de l'anatomie intrinsèque du m. moyen fessier (MF) et de son innervation par le rameau caudal du n. glutéal supérieur (NGS). 40 muscles ont été étudiés. L'existence d'une lame tendineuse dans l'épaisseur du MF a été constamment mise en évidence. Les rapports entre les éléments de l'architecture fibreuse intrinsèque du muscle et son innervation ont été étudiés. Les auteurs en déduisent la topographie d'une incision du MF respectant une zone de sécurité vis à vis de son innervation, procurant une exposition acétabulaire satisfaisante et des possibilités de réparation solide après chirurgie de l'articulation coxo-fémorale par voie d'abord transglutéale, et proposent la dénomination “hémimyotomie antérieure du MF”.
    Notes: Abstract The authors present a study of the intrinsic anatomy of the gluteus medius m. and of its innervation through the caudal branch of the superior gluteal n. The existence of an intramuscular tendon in the thickness of the gluteus medius was constantly prooved in 40 muscles. The relations of the intrinsic fibrous structure of the muscle and its innervation were studied. The authors deduce from that the topography of a gluteus medius incision, with respect to a safety area towards its innervation, which leads to an exposure of the acetabulum that is satisfying and gives opportunities of a sound repair after the surgery of the hip joint through the transgluteal approach. They propose the “anterior hemimyotomy of the gluteus medius m” designation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01628125
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Shear rheology of polymer solutions near the critical condition for elastic instability (1997)
    Springer
    Rheologica acta 36 (1997), S. 97-109 
    Details
    ISSN: 1435-1528
    Keywords: Polymer migration ; anomalous theology ; Boger fluid ; normal stress ; elastic instability
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Abstract The use of constant viscosity, highly elastic polymer solutions, so called Boger fluids, has been remarkably successful in elucidating the behavior of polymeric materials under flowing conditions. However, the behavior of these fluids is still complicated by many different physical processes occurring within a narrow window of observation time and applied shear rate. In this study, we investigate the long-time shear behavior of an ideal Boger fluid: a well characterized, athermal, dilute, binary solution of high molecular weight polystyrene in oligomeric polystyrene. Rheological measurements show that under an applied steady shear flow, this family of polymer solutions undergoes a transient decay of normal stresses on a timescale much longer than the polymer molecule's relaxation time. Rheological and flow visualization results demonstrate that the observed phenomenon is not caused by polymer degradation, phase separation, viscous heating, or secondary flows from elastic instabilities. Although the timescale is much shorter than that associated with polymer migration in the same solutions (MacDonald and Muller, 1996), the appearance of this phenomenon only at the rates where migration has been observed suggests that it may be a prerequisite for observing migration. In addition, we note that through sufficient preshearing of the sample, the normal stress decrease suppresses the elastic instability. These results show that there is considerable uncertainty in choosing the appropriate measure of the fluid relaxation time for consistently modeling the critical condition for the elastic instability, the decay of normal stresses, and the migration of polymer species.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00366816
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
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