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Hacke S, Krämer P, Steiner B. A Mobile Health Application to Enhance Self-Management Skills of Patients with Shoulder Impingement Syndrome During Rehabilitation. Stud Health Technol Inform 2022; 290:512-516. [PMID: 35673068 DOI: 10.3233/shti220129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Especially in chronic diseases, such as shoulder impingement syndrome (SIS), good self-management is important for patients to take personal responsibility for their treatment and make informed decisions in rehabilitation processes. Mobile apps integrating game design elements have great potential to increase patients self-management skills. A total of 21 functionalities for a self-management app were derived from semi-structured interviews with six patients and three therapists. Thereby, welcome messages, a personalized home-screen, and training plans are rated as particular useful. Ten of these functionalities could be implemented in a first prototype of SISco: your shoulder impingement syndrome companion. SISco provides possibilities for creating and executing training programs, learning about SIS, checking daily challenges, and making diary entries. Thereby, SISco motivates patients via progress bars, collecting XP, unlocking content and Dr. SISco the virtual therapist. Future work includes the implementation of further functionalities and the evaluation of SISco for usability and user acceptance.
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Affiliation(s)
- Sara Hacke
- Peter L. Reichertz Institute for Medical Informatics of TU Braunschweig and Hannover Medical School, Braunschweig, Germany
| | - Paul Krämer
- Peter L. Reichertz Institute for Medical Informatics of TU Braunschweig and Hannover Medical School, Braunschweig, Germany
| | - Bianca Steiner
- Peter L. Reichertz Institute for Medical Informatics of TU Braunschweig and Hannover Medical School, Braunschweig, Germany
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Baudoux L, Staebler A, Greif K, Beschorner C, Krämer B, Hoffmann S, Neis F, Andress J, Grube M, Pasternak J, Krämer P, Taran FA, Brucker S, Kommoss S. Histopathologisches Ultrastaging zur Identifikation positiver Sentinellymphknoten in der Therapie des Endometriumkarzinoms: Retrospektive Analyse an einem großen Kollektiv der Universitätsfrauenklinik Tübingen. Geburtshilfe Frauenheilkd 2020. [DOI: 10.1055/s-0040-1718121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
Affiliation(s)
- L Baudoux
- Institut für Frauengesundheit Tübingen
| | - A Staebler
- Institut für Pathologie, Universitätsklinikum Tübingen
| | - K Greif
- Institut für Pathologie, Universitätsklinikum Tübingen
| | - C Beschorner
- Institut für Pathologie, Universitätsklinikum Tübingen
| | - B Krämer
- Institut für Frauengesundheit Tübingen
| | | | - F Neis
- Institut für Frauengesundheit Tübingen
| | - J Andress
- Institut für Frauengesundheit Tübingen
| | - M Grube
- Institut für Frauengesundheit Tübingen
| | | | - P Krämer
- Institut für Frauengesundheit Tübingen
| | | | | | - S Kommoss
- Institut für Frauengesundheit Tübingen
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3
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Heitz F, Krämer P, Talhouk A, MA B, DS C, ES C, Scheunhage D, RF H, Senz J, Leung S, Hartkopf A, Krämer B, Brucker S, du Bois A, Harter P, FK K, Heublein S, Kommoss F, JN M, Singh N, Bosse T, Köbel M, MS A, Staebler A, Kommoss S. Anwendung der molekularen Risikostratifikation des Endometriums auf das endometrioide Ovarialkarzinom- eine retrospektive, internationale Multizenterstudie. Geburtshilfe Frauenheilkd 2020. [DOI: 10.1055/s-0040-1718219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
Affiliation(s)
- F Heitz
- Kliniken Essen-Mitte, Klinik für Gynäkologie und gynäkologische Onkologie
| | - P Krämer
- Tuebingen University Hospital, Department of Women’s Health
- University of British Columbia, Department of Obstetrics and Gynecology
| | - A Talhouk
- University of British Columbia, Department of Obstetrics and Gynecology
- BC Cancer, Vancouver General Hospital, and University of British Columbia, British Columbia’s Gynecological Cancer Research Team (OVCARE)
| | - Brett MA
- McMaster University, Department of Pathology and Molecular Medicine
| | - Chiu DS
- BC Cancer, Vancouver General Hospital, and University of British Columbia, British Columbia’s Gynecological Cancer Research Team (OVCARE)
- BC Cancer Research Centre, Department of Molecular Oncology
| | - Cairns ES
- University of British Columbia, Department of Obstetrics and Gynecology
| | - D Scheunhage
- Leiden University Medical Centre (LUMC), Department of Pathology
| | - Hammond RF
- Barts Health National Health Service Trust, Department of Pathology
| | - J Senz
- BC Cancer, Vancouver General Hospital, and University of British Columbia, British Columbia’s Gynecological Cancer Research Team (OVCARE)
- University of British Columbia, Department of Pathology and Laboratory Medicine
| | - S Leung
- BC Cancer, Vancouver General Hospital, and University of British Columbia, British Columbia’s Gynecological Cancer Research Team (OVCARE)
- University of British Columbia, Department of Pathology and Laboratory Medicine
| | - A Hartkopf
- Tuebingen University Hospital, Department of Women’s Health
| | - B Krämer
- Tuebingen University Hospital, Department of Women’s Health
| | - S Brucker
- Tuebingen University Hospital, Department of Women’s Health
| | - A du Bois
- Kliniken Essen-Mitte, Klinik für Gynäkologie und gynäkologische Onkologie
| | - P Harter
- Kliniken Essen-Mitte, Klinik für Gynäkologie und gynäkologische Onkologie
| | - Kommoss FK
- Heidelberg University Hospital, Institute of Pathology
| | - S Heublein
- Heidelberg University Hospital, Heidelberg and National Center for Tumor Diseases, Department of Obstetrics and Gynecology
| | - F Kommoss
- Medizin Campus Bodensee, Institute of Pathology
| | - McAlpine JN
- University of British Columbia, Department of Obstetrics and Gynecology
- BC Cancer Research Centre, Department of Molecular Oncology
| | - N Singh
- Barts Health National Health Service Trust, Department of Pathology
| | - T Bosse
- Leiden University Medical Centre (LUMC), Department of Pathology
| | - M Köbel
- Department of Pathology and Laboratory Medicine, University of Calgary
| | - Anglesio MS
- University of British Columbia, Department of Obstetrics and Gynecology
- BC Cancer, Vancouver General Hospital, and University of British Columbia, British Columbia’s Gynecological Cancer Research Team (OVCARE)
| | - A Staebler
- University Hospital Tuebingen, Institute of Pathology and Neuropathology
| | - S Kommoss
- Tuebingen University Hospital, Department of Women’s Health
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Grube M, Krämer P, Chiu D, Bosse T, Scheunhage D, Koebel M, Singh N, Manchanda R, Hammond R, Heitz F, Harter P, du Bois A, Ataseven B, Neudeck N, Beschorner C, Fischer A, Greif K, Krämer B, Brucker S, Talhouk A, Anglesio M, Staebler A, Kommoss S. Immunhistochemische Expression von L1CAM in endometrioiden Ovarialkarzinomen – Ein neuer prognostischer Marker? Geburtshilfe Frauenheilkd 2020. [DOI: 10.1055/s-0040-1718139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
Affiliation(s)
- M Grube
- Universitätsfrauenklinik Tübingen
| | - P Krämer
- Universitätsfrauenklinik Tübingen
| | - D Chiu
- Department of Obstetrics and Gynecology, University of British Columbia
| | - T Bosse
- Leiden University Medical Center
| | | | - M Koebel
- Department of Pathology and Laboratory Medicine, University of Calgary
| | - N Singh
- Dept of Cellular Pathology, BartsHealth NHS Trust
| | - R Manchanda
- Dept of Cellular Pathology, BartsHealth NHS Trust
| | - R Hammond
- Dept of Cellular Pathology, BartsHealth NHS Trust
| | | | | | | | | | - N Neudeck
- Institut für Pathologie, Universitätsklinikum Tübingen
| | - C Beschorner
- Institut für Pathologie, Universitätsklinikum Tübingen
| | - A Fischer
- Institut für Pathologie, Universitätsklinikum Tübingen
| | - K Greif
- Institut für Pathologie, Universitätsklinikum Tübingen
| | - B Krämer
- Universitätsfrauenklinik Tübingen
| | | | - A Talhouk
- Department of Obstetrics and Gynecology, University of British Columbia
| | - M Anglesio
- Department of Obstetrics and Gynecology, University of British Columbia
| | - A Staebler
- Institut für Pathologie, Universitätsklinikum Tübingen
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Bassing T, Krämer P, Nagel A, Cavallaro A. Echtzeit-Monitoring von Wartezeit, Terminplan und Befundfreigabezeit mithilfe eines RIS-basierten Dashboards. ROFO-FORTSCHR RONTG 2017. [DOI: 10.1055/s-0037-1600165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- T Bassing
- Universitätsklinikum Erlangen, Radiologisches Institut, Erlangen
| | - P Krämer
- Siemens Healthcare GmbH, Transformation and Advisory, Erlangen
| | - A Nagel
- Universitätsklinikum Erlangen, Radiologisches Institut
| | - A Cavallaro
- Universitätsklinikum Erlangen, Radiologisches Institut
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6
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Krone R, Dederer G, Kanstinger P, Krämer P, Schneider C, Schmalenbach I. Mobile demersal megafauna at common offshore wind turbine foundations in the German Bight (North Sea) two years after deployment - increased production rate of Cancer pagurus. Mar Environ Res 2017; 123:53-61. [PMID: 27936406 DOI: 10.1016/j.marenvres.2016.11.011] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2016] [Revised: 11/22/2016] [Accepted: 11/27/2016] [Indexed: 06/06/2023]
Abstract
Within the next decades the construction of thousands of different types of large wind turbine foundations in the North Sea will substantially increase the amount of habitat available to reef fauna. To gain first insights which effect these substantial changes in habitat structure and diversity might have on faunal stocks settling on hard substrata, we compared the mobile demersal megafauna associated with the common types of wind turbine foundations ('jacket', 'tripod' and 'monopile with scour protections of natural rock') in the southern German Bight, North Sea. Monopiles with scour protection were mostly colonized by typical reef fauna. They were inhabited by an average of about 5000 edible crabs Cancer pagurus (per foundation), which is more than twice as much as found at the foundation types without scour protection. Strong evidence was found that all three foundation types not only function as aggregation sites, but also as nursery grounds for C. pagurus. Assuming equal shares of the three foundation types in future wind farms, we project that about 27% of the local stock of C. pagurus might be produced on site. When, for example, comparing the existing fauna at 1000 ship wrecks and on the autochthonous soft substrate with those which probably will establish at the foundations of 5000 hypothetically realized wind turbines, it becomes clear that the German Bight in the future will provide new artificial reef habitats for another 320% crabs (C. pagurus) and 50% wrasse (Ctenolabrus rupestris) representing substrata-limited mobile demersal hard bottom species. Further research is urgently required in order to evaluate this overspill as it would be an important ecological effect of the recent offshore wind power development.
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Affiliation(s)
- R Krone
- Krone-Projekte, Unternehmen für Meereskunde, Umweltwissenschaften & Technik, Schleusenstraße 1-3, 27568 Bremerhaven, Germany; Hummerstation Helgoland, Division Biosciences, Alfred Wegener Institute for Polar and Marine Research, Am Handelshafen 12, 27570 Bremerhaven, Germany.
| | - G Dederer
- Bannholzstraße 9, 73579 Schechingen, Germany.
| | - P Kanstinger
- Octopus Science, Büro für Forschungstaucherarbeiten, Övelgönner Straße 25, 20257 Hamburg, Germany.
| | - P Krämer
- Department of Biology and Environmental Sciences, Animal Biodiversity and Evolutionary Biology, Carl von Ossietzky University Oldenburg, Carl von Ossietzky Straße 9-11, 26111 Oldenburg, Germany.
| | - C Schneider
- Octopod Research & Development GmbH, Kleine Bergstraße 30, 22767 Hamburg, Germany.
| | - I Schmalenbach
- Hummerstation Helgoland, Division Biosciences, Alfred Wegener Institute for Polar and Marine Research, Ostkaje 1118, 27498 Helgoland, Germany.
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7
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Krämer P, Aul A, Vock B, Frank C. [Emergency response management near the tracks of the public railway network: special aspects of missions connected with the German national railway system]. Anaesthesist 2010; 59:1021-8. [PMID: 20852836 DOI: 10.1007/s00101-010-1784-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Emergency response management and rescue operations concerning the railway network in Germany need special attention and implementation in several ways. The emergency response concerning the German national railway network managed by Deutsche Bahn AG is subject to various rules and regulations which have to be followed precisely. Only by following these rules and procedures is the safety of all emergency staff at the scene ensured. The German national railway network (Deutsche Bahn AG) provides its own emergency response control center, which specializes in managing its response to emergencies and dispatches an emergency response manager to the scene. This person serves as the primary Deutsche Bahn AG representative at the scene and is the only person who is allowed to earth the railway electrical power lines. This article will discuss different emergency situations concerning railway accidents and the emergency medical response to them based on a near collision with a high speed train during a rescue mission close to the railway track. Injury to personnel could only be avoided by chance and luck. The dangers and risks for rescue staff are specified. Furthermore, the article details practical guidelines for rescue operations around the German national railway track system.
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Affiliation(s)
- P Krämer
- Luftrettungszentrum Christoph 5, Ludwigshafen, Deutschland
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8
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9
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Frank C, Vetter SY, Krämer P, Reitzel T, Wentzensen A, Studier-Fischer S. [Outpatient surgery in hospital. An instrument for resource optimization?]. Unfallchirurg 2010; 113:422-4. [PMID: 20428839 DOI: 10.1007/s00113-010-1792-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The societies of western countries are facing enormous economic and social challenges. Despite a declining population size the number of elderly patients is growing and will lead to an increase in cases of trauma in the near future. In addition, the health care system will have to be financed by a reduced labor force. To realize the ambitious political goal of providing comprehensive medical care an economization of hospital treatment must be achieved. The bottleneck within the surgical specialties in case of efficient scheduling will be the capacity utilization of the operating theatres. Additional separate outpatient operating theatres adjacent to hospitals could be an efficient instrument for using resources and economizing medical procedures. Considering the socio-demographic alterations of our society an adequate discussion regarding the general medical conditions is essential.
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Affiliation(s)
- C Frank
- Klinik für Unfallchirurgie und Orthopädie, BG-Unfallklinik Ludwigshafen, Ludwig-Guttmann-Str. 13, 67071, Ludwigshafen.
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10
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Krämer P, Präve P, Schmidt‐Kastner UG. Standardization of bioreactors and peripheral equipment on the basis of food technology standards. FOOD BIOTECHNOL 2009. [DOI: 10.1080/08905439009549733] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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11
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Wortmann R, Glania C, Krämer P, Lukaszuk K, Matschiner R, Twieg R, You F. Highly transparent and birefringent chromophores for organic photorefractive materials. Chem Phys 1999. [DOI: 10.1016/s0301-0104(99)00087-7] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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12
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Voigt-Martin IG, Zhang ZX, Yan DH, Yakimanski A, Matschiner R, Krämer P, Glania C, Wortmann R, Detzer N, Schollmeyer D. Structural dependence of non-linear optical properties of 4-Dimethylamino-3-cyanobiphenyl. Colloid Polym Sci 1997. [DOI: 10.1007/s003960050048] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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13
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Krämer P, Wincierz U, Grübler G, Tschakert J, Voelter W, Mayer H. Rational approach to fractionation, isolation, and characterization of polysaccharides from the lichen Cetraria islandica. Arzneimittelforschung 1995; 45:726-31. [PMID: 7646581] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Polysaccharides, isolated from the lichen Cetraria islandica, have antimicrobial effectiveness. For pharmaceutical applications the two glucan components lichenan and isolichenan as well as the galactomannan component are of actual interest. Especially the a-glucan isolichenan ist used as an active ingredient in cough lozenges. The conditions for the extraction of the raw material, mainly pH and temperature, have a strong influence on the yield of lichenan, isolichenan, and galactomannan, and also on the amount of tannins in the extract. Target products and also by-products give higher extraction yields with increasing extraction temperatures. Hot water extraction with subsequent fractionation of the extracted polysaccharides by multiple freezing/thawing steps and water removal applying ethanol and ether permitted the isolation of the target polysaccharides in preparative quantities. Tannins were removed by reversed phase chromatography. IR and NMR spectroscopy were used for structural characterization of lichenan and isolichenan. After optimization of the hot water extraction process no significant lower extraction and fractionation yields have been obtained compared to the established tricky DMSO extraction procedure.
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Affiliation(s)
- P Krämer
- University of Stuttgart-Hohenheim, Maintal, Germany
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14
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Steinborn A, Gätje R, Krämer P, Kühnert M, Halberstadt E. [Cytokines in the diagnosis of amniotic infection syndrome]. Z Geburtshilfe Perinatol 1994; 198:1-5. [PMID: 8165834] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Accumulating evidence indicates an association between intraamniotic infection and raising concentrations of amniotic cytokines, resulting in preterm labor and preterm rupture of fetal membranes, because these cytokines are able to stimulate prostaglandin biosynthesis. Therefore the purpose of our study was to investigate if quantitative determination of Il-1 beta, Il-6, Il-8 and TNF-a in amniotic fluid may be a practicable method to diagnose intraamniotic infection. Since invasive amniocentesis doesn't allow repeated cytokine detection, in case of preterm rupture of fetal membranes, amniotic fluid also was obtained by placing a sterile gauze and cotton pad into the women's vagina, absorbing draining amniotic fluid for cytokine detection. Our results clearly indicate that Il-1 beta and TNF-a are not detectable in normal pregnancy, while Il-6 and Il-8 are produced in low, but constant levels. In contrast, in amniotic fluid of patients with intraamniotic infection high amounts of Il-6 and Il-8 were found, while Il-1 beta and TNF-a bioactivity became measurable, indicating that biosynthesis was activated. These results demonstrate, that infection associated cytokines detectable in amniotic fluid are highly sensitive markers for intraamniotic infection. In case of preterm rupture of fetal membranes recovery of amniotic fluid from a vaginal pad allows monitoring of cytokine bioactivity in daily intervals to control success of antibiotic treatment.
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Aschoff A, Krämer P, Benesch C, Klank A. Shunt-technology and overdrainage--a critical review of hydrostatic, programmable and variable-resistance-valves and flow-reducing devices. Eur J Pediatr Surg 1991; 1 Suppl 1:49-50. [PMID: 1807394] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- A Aschoff
- University of Heidelberg, Neurosurgical Department, Germany
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Abstract
This paper presents the development of a new heterogeneous enzyme immunoassay format for the detection of pesticides. It uses the technique of a flow injection system and is named flow injection immunoanalysis (FIIA). Results are demonstrated for the measurements of the herbicide atrazine, which belongs to the triazines, and the potential of this method compared with another immunoassay format (ELISA) is discussed.
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Affiliation(s)
- P Krämer
- GBF-Gesellschaft für Biotechnologische Forschung mbH, Abtl. Enzymtechnologie, Braunschweig, FRG
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17
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Wilhelm C, Krämer P, Lenartz-Weiler I. The energy distribution between the photosystems and light-induced changes in the stoichiometry of system I and II reaction centers in the chlorophyll b-containing alga Mantoniella squamata (Prasinophyceae). Photosynth Res 1989; 20:221-233. [PMID: 24424435 DOI: 10.1007/bf00034066] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/1988] [Accepted: 08/26/1988] [Indexed: 06/03/2023]
Abstract
The chlorophyll b-containing alga Mantoniella squamata was analyzed with respect to its capacity to balance the energy distribution from the light-harvesting antenna to photosystem I or photosystem II. It was shown, that this alga is unable to alter the absorption cross section of the two photosystems in terms of short-time regulations (state transitions). The energy absorbed by the LHC, which contains 60% of total photosynthetic pigments, is transferred to both photosystems without any preference. The stoichiometry of the two photosystems is found to be extremely unequal and variable during light adaptation. In high light, the molar ratio of P-680 per P-700 is found to be two, whereas under low light conditions this ratio accounts to nearly four. This very unbalanced stoichiometry of the reaction centers gives some new insights into the concept of the photosynthetic unit as well as in the importance of the regulation of the energy distribution. It is assumed that the high concentration of photosystem II can be understood as a mechanism to prevent the overexcitation of photosystem I. In addition, the changes im membrane protein pattern are not accompanied by variations in the ratio of appressed to nonappressed membranes as probed by ultrastructural analysis. It is suggested that the thylakoids are organized like a homogenous pigment bed. The lack of state transitions can be interpreted as a consequence of this unusual membrane morphology.
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Affiliation(s)
- C Wilhelm
- Institut für Allgemeine Botanik, Johannes-Gutenberg Universität Mainz, Saarstr. 21, D-6500, Mainz, FRG
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18
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Sievert H, Krämer P, Kober G, Bussmann WD, Kaltenbach M. Restenosis is a common feature of the angiographic follow-up after balloon valvoplasty of calcified aortic stenoses. Int J Cardiol 1989; 23:179-83. [PMID: 2722285 DOI: 10.1016/0167-5273(89)90246-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Balloon dilatation of calcified aortic stenosis was attempted in 12 patients, 6 men and 6 women, aged 38-82 years. Two patients underwent emergency surgery because of myocardial injury or pericardial tamponade. One patient with severe depressed left ventricular function in whom the procedure was attempted in cardiogenic shock died during the procedure. One patient experienced severe aortic insufficiency after dilatation. The remaining pressure gradient was higher than 50 mm Hg in another patient. Seven dilatations were considered to be successful with a remaining pressure gradient below 50 mm Hg and a mean gradient reduction of 53 mm Hg. In one of these 7 patients, who suffered from severe heart failure, valvoplasty had been carried out to make aortic valve replacement possible. The operation was performed 2 weeks later without complications. Five of 6 patients treated medically after successful valvoplasty had restenosis within 3 to 12 months. One of them exhibited a good result at 3 months but severe restenosis after one year. It is concluded that balloon valvoplasty of calcified aortic stenosis cannot be considered an alternative to surgery. If, however, left ventricular function improves after successful valvoplasty, valve replacement will then carry less risk.
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Affiliation(s)
- H Sievert
- Department of Cardiology, University of Frankfurt, F.R.G
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19
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Abstract
Balloon dilatation of the mitral valve was performed, trans-septum via the femoral vein or retrogradely via the femoral artery, in 20 patients, aged 31-65 years, with post-rheumatic mitral stenosis. Haemodynamically insignificant mitral regurgitation occurred in two patients. In one patient a permanent atrial septal defect was produced by the transseptal puncture. In a fourth patient severe mitral regurgitation occurred which required operation. There were no other serious complications. No dilatation was possible in three patients for technical reasons. Successful dilatation was achieved in 16 of the 20 patients. The end-diastolic transvalvular pressure gradient was reduced from 12 +/- 5 to 4 +/- 3 mm Hg. At follow-up, after 3-6 months (12 patients) or after 1-1.5 years (5 patients), in one instant after a second dilatation, a lasting good result was confirmed, the mean end-diastolic gradient being 4 +/- 3 mm Hg.
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Affiliation(s)
- H Sievert
- Abteilung für Kardiologie Universität, Frankfurt/Main
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20
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Sievert H, Kober G, Bussmann WD, Krämer P, Eckel L, Satter P, Kaltenbach M. [Long-term results of transluminal valvuloplasty in calcified aortic valve stenosis]. Dtsch Med Wochenschr 1988; 113:811-4. [PMID: 3371208 DOI: 10.1055/s-2008-1067727] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Transluminal valvuloplasty (TVP) was attempted in 11 patients, aged 38-82 years, with calcified aortic valve stenosis (AS). The transvalvular systolic pressure gradient was reduced from a mean of 91 +/- 28 to 44 +/-30 mm Hg. Two patients had needed an emergency with decompensated AS in cardiogenic shock, died during the operation, another died of the consequences of an endocarditis. One patient had an inadequate TVP: a renewed TVP was subsequently performed at another hospital, followed by an operation for severe aortic regurgitation produced by the second TVP. In four patients left-heart catheterization 3-12 months post-dilation demonstrated considerable restenosis. One patient was significantly improved clinically (but no angiography had as yet been performed) four months after the TVP. Doppler echocardiography in this patient, too, demonstrated renewed increase in transvalvular pressure gradient. The results demonstrate that, because of the high rate of recurrence, TVP is at present only rarely indicated for calcified AS.
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Affiliation(s)
- H Sievert
- Zentrum der Inneren Medizin, Abteilung für Kardiologie, Universitätsklinikum Frankfurt/Main
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Brinkmann UK, Krämer P, Presthus GT, Sawadogo B. Transmission in utero of microfilariae of Onchocerca volvulus. Bull World Health Organ 1976; 54:708-9. [PMID: 1088518 PMCID: PMC2366585] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Skin snips from newborn children and biopsy material from the umbilical cord and placenta of their mothers were examined. Microfilariae of O. volvulus were found in the skin of 2 out of 11 babies and in the umbilical cords of 2 out of 11 babies born to ten mothers infected with O. volvulus in Bawku Hospital, Ghana.
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