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  • 1
    Electronic Resource
    Electronic Resource
    Anal sphincter function after intersphincteric resection and stapled ileal pouch-anal anastomosis (1991)
    Springer
    Diseases of the colon & rectum 34 (1991), S. 8-16 
    Details
    ISSN: 1530-0358
    Keywords: Ileoanal anastomosis ; Continence ; Anal pressure ; Internal sphincter relaxation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract This study was done to determine the effect of the direct ileal pouch-anal anastomosis upon pressure and sensory components of the anal canal and ileal pouch. These findings were related to postoperative continence. Thirty-three patients with ileal pouch-anal anastomosis (25 continent, eight with episodic minor incontinence) were studied 3±0.3 and 25±5 months after ileostomy takedown. The maximum resting pressure in the anal canal was significantly lower in patients with an imperfect result (35±5 mm Hg) than in continent patients (44±5 mm Hg) (P〈0.05). Postoperatively the maximum squeeze anal pressure was slightly greater in continent than in incontinent patients (99±8 mm Hg vs.87±7 mm Hg) (P〉0.05). The postoperative recto-(ileo-)anal inhibitory reflex was present in 27 percent. The linear correlation between strength of rectal (ileal) distension and depth resp. duration of internal sphincter relaxation as preoperatively observed disappeared postoperatively in every group of patients. Simultaneous measurements of pouch and anal pressure in patients with imperfect results revealed a reduced positive pouch anal pressure gradient compared to the continent group. This low pouch-anal pressure gradient is thought to be responsible for the increased incidence of soiling in some of our patients.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02050200
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  • 2
    Electronic Resource
    Electronic Resource
    Die intraluminäre Schienung problematischer intestinaler Anastomosen mit Biomaterialrohren (1989)
    Springer
    Langenbeck's archives of surgery 374 (1989), S. 32-38 
    Details
    ISSN: 1435-2451
    Keywords: Intestinal anastomoses ; Internal splinting ; Absorbable and non-absorbable biomaterial tubes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung In einem tierexperimentellen Grundlagenversuch wurde an 80 Ratten das Prinzip der inneren Schienung problematischer intestinaler Anastomosen mit Biomaterialrohren überprüft. Eine problematische Anastomose entstand durch Zweipunktadaptation des oberen Dünndarmes. Alle Tiere der Kontrollgruppe (n =10) ohne innere Schienung verstarben bis zum zweiten postoperativen Tag. In den Behandlungsgruppen I-IV (n = 70) wurde die Dünndarmanastomose durch intraluminär plazierte, resorbierbare (Polyglactin, Kollagen, B 111) bzw. nicht resorbierbare (Polyurethan) Biomaterialrohre gesichert. Signifikant geringere Insuffizienzraten in den Behandlungs gruppen belegen die prinzipielle Effektivität dieses Verfahrens.
    Notes: Summary We performed small intestinal dissection in 80 laboratory rats. A critical anastomosis was achieved by two point adaption of small intestine with single sutures. 10 control animals receiving no intestinal splinting died within two days of operation. The remaining 70 animals underwent intestinal internal splinting with tubes of different absorbable (Polyglactine, Collagen, and B 111) and non-absorbable (Polyurethane) biomaterials. Significantly smaller leakage rates in the therapy groups proved the principle of internal splinting of complicated anastomoses in this animal model to be effective.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01261933
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  • 3
    Electronic Resource
    Electronic Resource
    Beiträge zu den Eigenschaften von Titanaten mit Ilmenitstruktur. I. Aspekte eines Hochtemperaturphasenübergangs in NiTiO3 (1991)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 594 (1991), S. 167-178 
    Details
    ISSN: 0044-2313
    Keywords: Nickel titanate, NiTiO3 ; high temperature phase transition ; electrical conductivity ; X-ray ; DTA ; i.r. ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Contributions to the Properties of Titanates with Ilmenite Structure. I. Aspects of a High Temperature Phase Transition in NiTiO3NiTiO3 (Ilmenite structure) shows an anomalous increase of the electrical conductivity in the temperature range between 1 250°C and 1 290°C. The temperature dependence of the Seebeck coefficient is also found to be anomalous in this region. DTA experiments are consistent with a phase transition; the transition enthalpy was estimated to ΔuHm = 17 ± 3 kJmol-1.NiTiO3 powders and single crystals were quenched from 1 350°C and 1 200°C to room temperature; in principle no differences of the lattice parameters or atomic positions could be detected. The determination of the distribution of cations using x-ray powder methods failt because of strong texture effects. Structure refinements with single crystal methods suggest an ordered Ilmenite structure independent of the quenching temperature.The results are in agreement with a reversible order-disorder transition of higher order. It seems to be impossible to quench the high temperature phase by conventional methods.
    Notes: Nickeltitanat (NiTiO3, Ilmenit-Typ) zeigt im Temperaturbereich zwischen 1 250°C und 1 290°C einen anormalen Anstieg der elektrischen Leitfähigkeit bei gleichzeitiger deutlicher Abnahme der Aktivierungsenergie. Auch die Temperaturabhängigkeit des Seebeck-Koeffizienten verläuft im genannten Temperaturbereich anormal. DTA-Untersuchungen deuten auf einen Phasenübergang hin; die Umwandlungsenthalpie ΔuHm beträgt 17 ± 3 kJ mol-1.Von Temperaturen unterhalb und oberhalb des Anomaliebereiches abgeschreckte Proben (Pulver und Einkristalle) weisen keine signifikanten Unterschiede in den Gitterkonstanten oder Atomlagen auf. Die Bestimmung der Kationenverteilung mit Hilfe röntgenographischer Pulvermethoden scheiterte am Auftreten starker Textureffekte. Einkristalluntersuchungen zeigen unabhängig von der Abschrecktemperatur eine geordnete Ilmenitstruktur an.Aus den erhaltenen Daten wird auf einen enantiotropen Ordnungs-Unordnungsübergang höherer Ordnung geschlossen, wobei die Hochtemperaturphase als mit den verwendeten Methoden nicht abschreckbar zu betrachten ist.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19915940120
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