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  • Electronic Resource  (3)
  • Cancer  (1)
  • Couette flow  (1)
  • Decompression  (1)
  • 1
    ISSN: 1432-1262
    Keywords: Keywords Peutz-Jeghers syndrome ; Hamartomatous polyps ; Intussusception ; Cancer
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  Peutz-Jeghers syndrome is an autosomal dominant inherited disorder characterized by hamartomatous polyps in the small bowel and mucocutaneous pigmentation. Patients with Peutz-Jeghers syndrome often present as surgical emergencies with complications of the polyps, such as intussusception, bowel obstruction, and bleeding. Recently an increased risk of malignancies has also been reported. This study was initiated to determine the clinical features of Peutz-Jeghers syndrome in Korean patients, with special attention to the development of malignancies. Thirty patients with Peutz-Jeghers syndrome were investigated; their median age was 23.5 years, and symptoms appeared at a median age of 12.5 years. Family history was positive in one-half of cases, and mucocutaneous pigmentation was observed in almost all patients (93%). The jejunoileum was the most frequent site of the polyps, and there were generally 10–100 polyps. Multiple laparotomies were performed in a substantial portion of the patients, due mainly to polyp-induced bowel obstruction, and the surgical interventions were begun at a relatively young age (average 21.4 years). Four cases of small-bowel cancer and one case of breast cancer were detected in probands, at a relatively young age (mean 36 years). Cancers of the small bowel, stomach, colon, breast and cervix were diagnosed in the first relatives of the probands. Close follow-up from an early age should thus be performed in patients with Peutz-Jeghers syndrome as they are at high risk of surgical emergency and development of malignancy.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    European journal of plastic surgery 22 (1999), S. 308-312 
    ISSN: 1435-0130
    Keywords: Key words Exophthalmos ; Protruding eyeball ; Decompression
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  The typical characteristics of Oriental faces are less prominent supraorbital ridges, a flat and broad nose, and thick, bulky upper eyelids. These characteristics make the eye appear protruded even when they are within the normal range or on the borderline of the exophthalmometric data. Prior to correction of the protruding eye, the patient’s medical and psychological status are investigated. The volume of the bony orbit is estimated using 3-D CT scan data and exophthalmometry before and after the operation. The surgical correction is planned to decompress the orbital contents with preservation of the visual axis. The lateral orbital wall is expanded without change of facial width. The medial wall and orbital floor are outfractured with preservation of continuity of the maxillary and ethmoid bone and sinus mucosa to prevent herniation of the orbital contents and disturbance of extraocular muscle dysfunction. Removal of the retrobulbar fat is mainly from the upper half of the orbit. In the past three years, orbital decompression has been performed in eight patients (12 eyes) for aesthetic reasons. The exophthalmometric data ranged from 17.5 mm to 19.5 mm, with an average of 18.3 mm before operation, this changed 2.0 to 7.0 mm with an average of 3.54 mm after operation. The postoperative complications were two cases of subconjunctival hemorrhage and one case of temporary diplopia. After follow-up of 14 months (4–38 months), there were no cosmetic or functional problems.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Rheologica acta 28 (1989), S. 13-24 
    ISSN: 1435-1528
    Keywords: One-modeGiesekus model ; mobility parameter ; Weissenberg number ; Couette flow ; Poiseuille flow
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Abstract Analytical solutions for the plane Couette flow and the plane Poiseuille flow of the one-mode Giesekus fluid without any retardation time have been obtained by considering the domain of definition for each of the two branch solutions which arise due to the presence of the quadratic stress terms in the constitutive equations. For each fixed value of the mobility parametera, the limiting value of the Weissenberg number for the upper branch solution, i.e., the physically realistic solution is determined in terms of the corresponding dimensionless shear stress for the plane Couette flow and in terms of the corresponding dimensionless pressure gradient for the plane Poiseuille flow. In the case of the plane Couette flow, it is shown that fora falling in the range 0≤a≤1/2 only the physically realistic solution exists while for 1/2〈a ≤1 a nonphysical solution coexists with the realistic one. In the case of the plane Poiseuille flow, it is shown that the non-physical solution cannot even exist around the center plane of the channel, and the effects of the mobility parameter and the dimensionless pressure gradient on the flow variables are investigated. Possible extensions of the present approach to other steady simple shear flows with and without the introduction of the retardation time are also discussed.
    Type of Medium: Electronic Resource
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