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  • 1
    Electronic Resource
    Electronic Resource
    A safe and simple method to maintain a clear field of vision during laparoscopic cholecystectomy (1992)
    Springer
    Surgical endoscopy and other interventional techniques 6 (1992), S. 197-198 
    Details
    ISSN: 1432-2218
    Keywords: Laparoscopic cholecystectomy ; new Ushaped retractor ; Clear field
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary A clear field of vision during laparoscopic cholecystectomy was attained by using a newly designed retractor which elevates the abdominal wall and does not require high-pressure CO2 infusion into the peritoneal cavity. As the abdominal cavity is continuously ventilated, smoke from the cauterization is suctioned off through openings in the middle part of the retractor. There is no interference with placement of ports.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02210882
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    A newly designed single dissector useful for laparoscopic cholecystectomy (1992)
    Springer
    Surgical endoscopy and other interventional techniques 6 (1992), S. 144-146 
    Details
    ISSN: 1432-2218
    Keywords: Laparoscopic cholecystectomy ; A new single dissector
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary We developed a modified dissector capable of carrying out a one-hand operation involving three fundamental functions: grasping, sharp or blunt dissection, and dividing the tissues. With this single dissector, laparoscopic cholecystectomy can be rapidly and safely performed without changing the forceps or instruments through the trocar.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02309089
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    A prospective randomized trial comparing pneumoperitoneum and U-shaped retractor elevation for laparoscopic cholecystectomy (1993)
    Springer
    Surgical endoscopy and other interventional techniques 7 (1993), S. 311-314 
    Details
    ISSN: 1432-2218
    Keywords: Elevating method ; U-shaped retractor ; Laparoscopic cholecystectomy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Between April and August 1991, 83 Japanese patients with symptomatic gallstones underwent laparoscopic cholecystectomy in our clinics. A prospective randomized trial was carried out to examine the safety, efficacy, and complications of the two techniques, pneumoperitoneum vs an elevating method using a U-shaped retractor. Forty-two patients were randomly allocated to the pneumoperitoneum (P) group and 41 to the U-shaped retractor (U) group. These two groups were well matched with respect to age, sex, etiology, and the severity of the chronic cholecystitis. Laparoscopic resection was successful for 88.1% (37/42) in the P group and 100% (41/41) in the U group. In patients with a severe fibrotic gallbladder, the rate of success was significantly higher (P〈0.05) in the U group (100%, 6/6) than in the P group (11.8%, 1/6). In the moderately inflamed group, the operation time (mean±SD) was significantly (P〈0.01) less in the U group (58.7±22.7) than in theP group (87.3±18.3). With the U-shaped retractor the usual surgical instruments can be used, and a rapid and safer laparoscopic cholecystectomy can be carried out. We prefer this approach to a pneumoperitoneum for patients with an inflamed gallbladder as hospital stay and pain are minimal.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00725947
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    The computer modeling of multicomponent, semibatch emulsion copolymerization (1987)
    Stamford, Conn. [u.a.] : Wiley-Blackwell
    Polymer Engineering and Science 27 (1987), S. 470-482 
    Details
    ISSN: 0032-3888
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: A computer modeling concept was developed to deal with multicomponent emulsion copolymerization systems. Based on the model, a simulating program called NSBEC (n-component, semibatch emulsion copolymerization) was prepared., NSBEC is capable of carrying out a variety of operations involving any number of monomers with different modes of ingredient feed. In this paper, first the basic concept of the model is explained, then several applications to the actual experimental systems (e.g., acrylonitrile-vinylidene chloride, vinyl acetate-butyl acrylate, and methyl methacrylate-butyl acrylate) are discussed. Finally, the probable control of copolymer composition by means of the semibatch operation based on NSBEC is proposed. The authors expect that use of NSBEC can substantially reduce the number of experimental runs previously required to describe the system.
    Additional Material: 14 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pen.760270613
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    Paper (German National Licenses)
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