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  1. Article ; Online: Peranale Blutung: 3 Kasuistiken für Hausärzte.

    Ommer, Andreas

    MMW Fortschritte der Medizin

    2022  Volume 164, Issue 3, Page(s) 67–71

    Title translation Management of peranal bleeding in a primary care setting.
    MeSH term(s) Gastrointestinal Hemorrhage ; Humans ; Primary Health Care
    Language German
    Publishing date 2022-02-11
    Publishing country Germany
    Document type Journal Article ; Review
    ZDB-ID 1478211-x
    ISSN 1613-3560 ; 1438-3276
    ISSN (online) 1613-3560
    ISSN 1438-3276
    DOI 10.1007/s15006-022-0770-x
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  2. Article: Hämorrhoiden, Fissur, Fistel, Abszess - häufige Krankheitsbilder in der täglichen Routine einer proktologischen Praxis

    Ommer, Andreas

    Gyn

    2022  Volume 27, Issue 2, Page(s) 106

    Language German
    Document type Article
    ZDB-ID 2017599-1
    ISSN 1432-2870
    Database Current Contents Medicine

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  3. Book ; Online ; E-Book: Chirurgische Proktologie

    Mölle, Bernward / Ommer, Andreas H. / Lange, Jochen / Girona, Josef

    2018  

    Author's details Bernward Mölle, Andreas Ommer, Jochen Lange, Josef Girona (Hrsg.)
    Keywords Medicine ; Dermatology ; Gastroenterology ; Proctology ; Rectum/Surgery ; Minimally invasive surgery ; Urology
    Subject code 617.555
    Language German
    Size 1 Online-Ressource (XIV, 482 Seiten)
    Edition 3., vollständig neu bearbeitete Auflage
    Publisher Springer
    Publishing place Berlin
    Publishing country Germany
    Document type Book ; Online ; E-Book
    Remark Zugriff für angemeldete ZB MED-Nutzerinnen und -Nutzer
    HBZ-ID HT019631369
    ISBN 978-3-662-54682-6 ; 9783662546819 ; 3-662-54682-5 ; 3662546817
    DOI 10.1007/978-3-662-54682-6
    Database ZB MED Catalogue: Medicine, Health, Nutrition, Environment, Agriculture

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  4. Article ; Online: Komplikationsmanagement in der Fissur- und Fistelchirurgie.

    Ommer, Andreas

    Der Chirurg; Zeitschrift fur alle Gebiete der operativen Medizen

    2015  Volume 86, Issue 8, Page(s) 734–740

    Abstract: Background: Fistula-in-ano and anal fissures are common proctological diseases. In most cases of anal fissures conservative treatment provides good clinical results, whereas for fistula-in-ano operative treatment is the only option.: Objective: The ... ...

    Title translation Management of complications of fissure and fistula surgery.
    Abstract Background: Fistula-in-ano and anal fissures are common proctological diseases. In most cases of anal fissures conservative treatment provides good clinical results, whereas for fistula-in-ano operative treatment is the only option.
    Objective: The most important and for the patient most stressful long-term complication is postoperative incontinence, especially as the deliberate severance of the anal sphincter musculature is part of the treatment for many patients. In this article the causes and treatment options are discussed.
    Results: The therapy of choice for patients with persisting symptoms caused by an anal fissure is fissurectomy. Incontinence disorders develop due to severance of parts of the internal sphincter or resection of the anoderm. In patients with anal fistulas the occurrence of incontinence disorders depends on the anatomical relationship of the fistula to the sphincter, the surgical procedure and also on pre-existing damage, e.g. from childbirth or other sphincter trauma and scar formation, notably in patients with multiple surgical interventions. Severance of the sphincter muscles in proximal transsphincteric and suprasphincteric fistulas in particular bears a high risk of postoperative incontinence. Data from the literature regarding postoperative fecal incontinence vary enormously due to different follow-up intervals and also variable definitions of the term fecal incontinence.
    Conclusion: Options for the treatment of postoperative fecal incontinence are limited. Treatment of postoperative incontinence should first be conservative. Surgical repair of damaged sphincter muscles is often of limited success and sacral nerve stimulation might be an option in selected patients. Especially in patients with fissure-in-ano the indications for surgery should be strictly adhered to. For fistula-in-ano the least invasive and most sphincter-preserving procedure should be selected.
    MeSH term(s) Endosonography ; Fecal Incontinence/etiology ; Fecal Incontinence/prevention & control ; Fissure in Ano/surgery ; Follow-Up Studies ; Guideline Adherence ; Humans ; Postoperative Complications/etiology ; Postoperative Complications/prevention & control ; Postoperative Complications/therapy ; Rectal Fistula/surgery ; Recurrence ; Risk Factors
    Language German
    Publishing date 2015-08
    Publishing country Germany
    Document type English Abstract ; Journal Article ; Review
    ZDB-ID 1521-0
    ISSN 1433-0385 ; 0009-4722
    ISSN (online) 1433-0385
    ISSN 0009-4722
    DOI 10.1007/s00104-015-0001-4
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article: Der anale Schmerz

    Ommer, Andreas

    Der Allgemeinarzt

    2016  Volume 38, Issue 17, Page(s) 56

    Language German
    Document type Article
    ZDB-ID 603653-3
    ISSN 0172-7249
    Database Current Contents Medicine

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  6. Article ; Online: The Management of Pilonidal Sinus.

    Iesalnieks, Igors / Ommer, Andreas

    Deutsches Arzteblatt international

    2019  Volume 116, Issue 1-2, Page(s) 12–21

    Abstract: Background: Pilonidal disease is an acute or chronic infection in the subcutaneous fatty tissue, mainly in the natal cleft. Its incidence in Germany in 2012 was 48 cases per 100 000 persons per year.: Methods: This review is based on pertinent ... ...

    Abstract Background: Pilonidal disease is an acute or chronic infection in the subcutaneous fatty tissue, mainly in the natal cleft. Its incidence in Germany in 2012 was 48 cases per 100 000 persons per year.
    Methods: This review is based on pertinent publications retrieved by a selective literature search.
    Results: The numerous minimally invasive techniques that are available for the treatment of pilonidal disease have the advantages of being relatively atraumatic and of enabling the patient to continue working almost without interruption. They are suitable for small lesions that have not been previously surgically treated. These techniques are associated with a higher recurrence rate than excisional methods (level of evidence [LoE]: Ib). It is not yet clear whether minimally invasive techniques employing laser or endoscopic technology can reduce the recurrence rate. In systematic meta-analyses, the duration of wound healing was shorter after off-midline techniques (the Karydakis procedure, the Limberg procedure, and others) than after excision with open wound treatment; the off-midline techniques should, therefore, be preferred for patients who have undergone previous surgery and for those with large lesions (LoE: Ia). Excision with midline suturing should not be performed (LoE: Ia). Postoperative permanent shaving cannot be recommended either (LoE: IV).
    Conclusion: Further randomized trials are needed to clarify the role of newer techniques in the treatment of pilonidal disease.
    MeSH term(s) Humans ; Pilonidal Sinus/therapy ; Randomized Controlled Trials as Topic ; Treatment Outcome
    Language English
    Publishing date 2019-02-14
    Publishing country Germany
    Document type Journal Article ; Review
    ZDB-ID 2406159-1
    ISSN 1866-0452 ; 1866-0452
    ISSN (online) 1866-0452
    ISSN 1866-0452
    DOI 10.3238/arztebl.2019.0012
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  7. Book ; Online: Retrieval-Augmented Diffusion Models

    Blattmann, Andreas / Rombach, Robin / Oktay, Kaan / Ommer, Björn

    2022  

    Abstract: Generative image synthesis with diffusion models has recently achieved excellent visual quality in several tasks such as text-based or class-conditional image synthesis. Much of this success is due to a dramatic increase in the computational capacity ... ...

    Abstract Generative image synthesis with diffusion models has recently achieved excellent visual quality in several tasks such as text-based or class-conditional image synthesis. Much of this success is due to a dramatic increase in the computational capacity invested in training these models. This work presents an alternative approach: inspired by its successful application in natural language processing, we propose to complement the diffusion model with a retrieval-based approach and to introduce an explicit memory in the form of an external database. During training, our diffusion model is trained with similar visual features retrieved via CLIP and from the neighborhood of each training instance. By leveraging CLIP's joint image-text embedding space, our model achieves highly competitive performance on tasks for which it has not been explicitly trained, such as class-conditional or text-image synthesis, and can be conditioned on both text and image embeddings. Moreover, we can apply our approach to unconditional generation, where it achieves state-of-the-art performance. Our approach incurs low computational and memory overheads and is easy to implement. We discuss its relationship to concurrent work and will publish code and pretrained models soon.

    Comment: Technical Report
    Keywords Computer Science - Computer Vision and Pattern Recognition
    Subject code 004
    Publishing date 2022-04-25
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  8. Book ; Online: Text-Guided Synthesis of Artistic Images with Retrieval-Augmented Diffusion Models

    Rombach, Robin / Blattmann, Andreas / Ommer, Björn

    2022  

    Abstract: Novel architectures have recently improved generative image synthesis leading to excellent visual quality in various tasks. Of particular note is the field of ``AI-Art'', which has seen unprecedented growth with the emergence of powerful multimodal ... ...

    Abstract Novel architectures have recently improved generative image synthesis leading to excellent visual quality in various tasks. Of particular note is the field of ``AI-Art'', which has seen unprecedented growth with the emergence of powerful multimodal models such as CLIP. By combining speech and image synthesis models, so-called ``prompt-engineering'' has become established, in which carefully selected and composed sentences are used to achieve a certain visual style in the synthesized image. In this note, we present an alternative approach based on retrieval-augmented diffusion models (RDMs). In RDMs, a set of nearest neighbors is retrieved from an external database during training for each training instance, and the diffusion model is conditioned on these informative samples. During inference (sampling), we replace the retrieval database with a more specialized database that contains, for example, only images of a particular visual style. This provides a novel way to prompt a general trained model after training and thereby specify a particular visual style. As shown by our experiments, this approach is superior to specifying the visual style within the text prompt. We open-source code and model weights at https://github.com/CompVis/latent-diffusion .

    Comment: 4 pages
    Keywords Computer Science - Computer Vision and Pattern Recognition
    Subject code 004
    Publishing date 2022-07-26
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  9. Article ; Online: Wundheilungsstörungen nach Exzision und offener Behandlung eines Sinus pilonidalis.

    Petersen, Sven / Ommer, Andreas / Iesalnieks, Igors / Doll, Dietrich

    Zentralblatt fur Chirurgie

    2020  Volume 146, Issue 4, Page(s) 417–426

    Abstract: Introduction: Pilonidalis sinus disease is a mostly chronic selective infection of the hairy skin in the area of skin wrinkles, mainly in the area of the natal cleft. Open treatment is still the most common recommended therapy. Nevertheless, there may ... ...

    Title translation Wound Healing Disorders after Excision and Open Treatment for Pilonidal Sinus.
    Abstract Introduction: Pilonidalis sinus disease is a mostly chronic selective infection of the hairy skin in the area of skin wrinkles, mainly in the area of the natal cleft. Open treatment is still the most common recommended therapy. Nevertheless, there may be healing disorders within the framework of open wound treatment, which can significantly complicate the course.
    Methods: The following is an overview of wound healing disorders after excision of pilonidalis sinus. Healing time and frequency are determined on the basis of current data and the causes of the healing disorder are evaluated. In addition, possible treatment options are presented and treatment recommendations are made.
    Results: The evaluation of published data on wound healing period showed that the wound usually heals after a mean of two months. The results of the German forces cohort study show by way of example that almost all wounds have healed in the period up to three months. However, a small percentage of non-healing wounds remain. The frequency of significantly delayed wound healing is given in the literature as 2 - 5%. The influencing factors for wound healing after sinus pilonidalis excision are not only the size and symmetry of the excision wound but also other details of open wound treatment. In addition to intensification of the previous open wound treatment, the new excision and refreshment of the wound are mentioned as treatment options in the event of a lack of wound healing. Furthermore, changes in strategy for plastic-reconstructive procedures or other surface treatment are also recommended.
    Conclusion: The excision wound of pilonidalis sinus should be healed after three to four months at the latest, after which the wound can be regarded as a wound with significantly delayed healing or as a wound healing disorder. Around this time, the findings should be re-evaluated and, if necessary, a change in the treatment concept should be made.
    MeSH term(s) Cohort Studies ; Humans ; Pilonidal Sinus/surgery ; Reconstructive Surgical Procedures ; Recurrence ; Treatment Outcome ; Wound Healing
    Language German
    Publishing date 2020-12-17
    Publishing country Germany
    Document type Journal Article ; Review
    ZDB-ID 200935-3
    ISSN 1438-9592 ; 0044-409X
    ISSN (online) 1438-9592
    ISSN 0044-409X
    DOI 10.1055/a-1301-2051
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  10. Book ; Thesis: Die postnatale Entwicklung des cholinergen Systems in Kernkomplexen der Medulla oblongata der Ratte

    Ommer, Andreas H.

    1989  

    Author's details vorgelegt von Andreas Heinrich Ommer
    Size 96 Bl. : Ill.
    Document type Book ; Thesis
    Thesis / German Habilitation thesis Essen, Univ., Diss., 1991
    HBZ-ID HT003753854
    Database Catalogue ZB MED Medicine, Health

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    Shelf markLoan statusLocation
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