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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Diseases of the colon & rectum 43 (2000), S. 771-774 
    ISSN: 1530-0358
    Keywords: Anastomosis ; Colectomy ; Diverticulitis ; Laparoscopic sigmoid resection
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract PURPOSE: Operating room time and anastomosis-related morbidity of laparoscopic-assisted sigmoid resection with anastomosis performed in an open fashion through a horizontal suprapubic incision or laparoscopically after re-establishing pneumoperitoneum were compared. METHODS: A randomized trial was performed on patients with recurrent uncomplicated diverticulitis of the sigmoid colon during a 14-month period. Inclusion criteria were persistence of symptoms despite medical treatment and two previous admissions. Exclusion criteria included complicated diverticulitis, suspected cancer, and previous extensive abdominal surgery. Because skin incisions were similar and patients were randomly assigned in the operating room, the trial was performed as double blind. RESULTS: There were no deaths. Two patients were excluded before randomization. Three patients were not treated as allocated because of conversion to open surgery. Aside from previous abdominal-surgery rates, 16 patients with laparoscopic-assisted sigmoid resections after re-establishing pneumoperitoneum and 15 patients with laparoscopic-assisted sigmoid resections with anastomosis performed in an open fashion through a horizontal suprapubic incision were well-matched for age, gender, weight, American Society of Anesthesiology class, previous admissions, skin-incision length, size of circular stapler, and mobilization of splenic flexure. There were no significant differences in morbidity rates (3/16vs. 3/15), complete doughnuts (16/16vs. 15/15), blood loss (300vs. 200 ml), flatus (4vs. 4 days), solid-food resumption (5vs. 6 days), stay (8.5vs. 9 days) in laparoscopic-assisted sigmoid resection after re-establishing pneumoperitoneum and laparoscopic-assisted sigmoid resection with anastomosis performed in an open fashion through a horizontal suprapubic incision groups, respectively. Patients with laparoscopic-assisted sigmoid resection after re-establishing pneumoperitoneum had statistically longer operating room time (295vs. 190 minutes;P〈0.01). Median follow-up was 12 and 10 months in 10 patients with laparoscopic-assisted sigmoid resection after reestablishing pneumoperitoneum and 11 patients with laparoscopic-assisted sigmoid resection with anastomosis performed in an open fashion through a horizontal suprapubic incision, respectively. One patient with laparoscopic-assisted sigmoid resection with anastomosis performed in an open fashion through a horizontal suprapubic incision had an anastomotic stenosis endoscopically dilated. CONCLUSIONS: Nonrestoration of pneumoperitoneum after laparoscopic-assisted sigmoid resection allows a decrease in operating room time and a similar outcome.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    Journal of Morphology 197 (1988), S. 209-219 
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: Two groups of external excretory pores associated with glandular units (AU and LPU) were observed on the labrum, one pair laterally and three pairs posteriorly. Each external pore leads to an underlying conical, flask-shaped epidermal chamber. The wide base of this chamber is perforated by an internal pore that delivers secretions from the excretory duct of a glandular unit. The chambers serve to protect the internal pores from turbulence in the outside environment. Expulsion of secretions from the chambers is probably brought about by contraction of labral striated muscles, which synchronizes opening of the AU and LPU pores. A complex funnel-shaped structure forms the internal end of the excretory duct between each chamber and the corresponding pole of accumulation for the secretory product of a glandular unit. This structure, composed of an epidermal syncytium lined by a sleeve of several aligned auxiliary cells, probably ensures a tight connection between the epidermal chamber and the syncytium. The dorsalmost glandular units (LDU) have no pores in the vicinity of their poles of accumulation. Instead they secrete through cuticular ducts delimited by aligned auxiliary cells. External pores for these canals have not yet been located. The secretions of lateral pores may be mucopolysaccharides that play an essential role in agglutination of food particles soon after capture, while the secretions of posterior pores may contain glycoproteins that mix with food only after ingestion into the buccal cavity and probably start the process of digestion.
    Additional Material: 18 Ill.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: These investigations concern two freshwater calanoid copepods Hemidiaptomus ingens and Mixodiaptomus kupelwieseri. The first aspect of the research relates to the processes involved in the formation and the differentiation of the ooplasmic organelles at the time of primary vitellogenesis. During this phase, a number of complex associations develop in the ooplasm. They consist chiefly of nuage-like structures, corresponding to extruded nuclear material, and vesicular formations, some arising from the nuclear envelope and the others neoformed in the ooplasm. These associations represent centers of maturation for ribosomes and synthesis for reticulum membranes. Annulate lamellae may be observed near these associations. Biogenesis of the reticulum always precedes the differentiation of the Golgi apparatus. Indeed, the dictyo-somes develop in characteristic complexes including endoplasmic reticulum cisternae and numerous vesicles resulting from intensive blebbing from cisternae. The second aspect of this research concerns yolk synthesis and accumulation of hyaloplasmic inclusions. A preliminary synthesis of yolk occurs early in these complexes and becomes more important after achievement of Golgi apparatus biogenesis. However, the most important yolk storage results from exogenous molecules and consists of complex globules, which develop into the ooplasm during secondary vitellogenesis. Formation of these globules is associated with the accumulation of two categories of inclusions in the hyaloplasm, i.e., lipid droplets and clusters of glycogen particles. At the end of vitellogenesis, a new type of endogenous material develops into small cisternae localized in the cortical ooplasm. © 1993 Wiley-Liss, Inc.
    Additional Material: 31 Ill.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    Journal of Morphology 197 (1988), S. 21-32 
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: In Centropages typicus the labrum contains two symmetric gland clusters on the right and left sides. Each cluster comprises two principal elements: a vast unit (AU) located in the anterior, distal area and a dozen smaller units (LPU) in the lateral, posterior area. All these glandular units empty through several pores situated on the labrum. In addition, other secretory units (LDU) are observed in a more dorsal and posterior zone at the level of the perioesophageal nerve ring, and hence outside the labrum itself; these LDU probably secrete through the dorsal side of the stomodeum. All the glandular units (i.e., AU, LPU, and LDU) are organized in syncytia. They have the typical ultrastructural features of a secretory system (rough endoplasmic reticulum, numerous dictyosomes, and secretory granules, the latter amassed at one pole), and several stages of activity may be characterized. The biochemical composition of the products synthesized by rough endoplasmic reticulum and Golgi apparatus is probably very complex. Mucopolysaccharides and glycoproteins both appear to be contained in a single type of grain. The mucopolysaccharides would cause agglutination of food particles carried up to the stomodeum by water currents. The glycoproteins would consist of different enzymes functioning in a preliminary digestive phase occurring before the aliments enter the midgut.
    Additional Material: 21 Ill.
    Type of Medium: Electronic Resource
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