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  • 1
    ISSN: 1432-1238
    Keywords: Key words Infant ; Congenital heart disease ; ARDS ; Capillary leak ; Soluble l-selectin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Objective: In critical care patients at risk of developing the acute respiratory distress syndrome (ARDS), low soluble l-selectin (sCD62L) plasma concentrations have been shown to be associated with progression to ARDS and prolonged subsequent mechanical ventilation. This study aimed to determine the usefulness of sCD62L plasma concentrations to identify infants undergoing cardiovascular surgery who are at risk for postoperative pulmonary dysfunction and capillary leaks. Design: Serial measurements of sCD62L plasma concentrations in a cohort of infants with congenital heart disease before, during, and after surgery for 4 consecutive days. Setting and patients: Infants aged 3–337 days undergoing cardiovascular surgery with (N = 27) or without (N = 12) cardiopulmonary bypass in a tertiary care center. Results: sCD62L concentrations before surgery showed a strong correlation with the infant's age (r = 0.77, p 〈 0.001). During surgery, sCD62L levels dropped from 9.0 ± 0.7 to 5.6 ± 0.4 nmol/l (mean ± SEM; p 〈 0.001). The minimum sCD62L concentration during and after surgery did not differ between infants operated upon with or without cardiopulmonary bypass (p 〉 0.1) or in infants who did (N = 10) or did not (N = 29) develop capillary leak syndrome. Whereas capillary leak syndrome was associated with prolonged mechanical ventilation (p 〈 0.01), there was no relationship between sCD62L concentrations at baseline or at any time thereafter and number of hours on the ventilator (p 〉 0.1). Conclusion: sCD62L concentrations before or after surgery are not apt to identify infants at increased risk of prolonged mechanical ventilation.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Zeitschrift für Herz-, Thorax- und Gefässchirurgie 12 (1998), S. 189-192 
    ISSN: 0930-9225
    Keywords: Schlüsselwörter Echokardiographie – Chirurgie angeborener Herzfehler ; Key words Echocardiography – Surgery of congenital heart disease
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Purpose of this study was to evaluate the clinical utility of intraoperative echocardiography in the assessment of surgical repair of congenitally malformed hearts. In 235 of 508 patients who underwent cardiac surgery during a one year period transesophageal intraoperative echocardiography was performed. This was done to exclude residual ventricular septal defects or right ventricular outflow tract obstruction (n=84), to evaluate results of AV valve reconstruction (n=61), to assess ventricular function following arterial switch operation for complete transposition or in complex heart defects palliated by a Fontan-type procedure (n=50), to assess repair of left ventricular outflow obstruction (n=22) and for miscellaneous defects (n=18). Residual defects leading to immediate reoperation during the same surgical session were found in 4 patients (1.7%), minor residual defects not requiring reoperation were present in 6 patients (2.6%). In 2 patients with complete AV septal defect the left AV valves were only mildly regurgitant immediately after reconstruction but subsequent suture deshiscence required later reopoeration. Echocardiographic data were supplemented by direct pressure measurements in the ventricles and contrast injection into the left atrium. We conclude that intraoperative echocardiography can provide useful clinical informations, if its findings are interpreted in context with pressure measurements and contrast injections.
    Notes: Zusammenfassung Zweck dieser Studie war, den klinischen Nutzen der intraoperativen Echokardiographie bei Patienten mit angeborenen Herzfehlern zu untersuchen. Von 508 während des Zeitraumes eines Jahres durchgeführten Operationen bei angeborenen Herzfehlern wurde bei 235 (47%) eine intraoperative Echokardiographie durchgeführt. Die Indikationen waren Ausschluß von residuellen Ventrikelseptumdefekten und residuellen rechtsventrikulären Ausflußbahnobstruktionen (n=84), Evaluation von AV Klappenrekonstruktionen (n=61), vorwiegende Evaluation der Ventrikelfunktion nach arterieller Switchoperation bei kompletter Transposition oder bei Palliation komplexer Herzfehler durch eine Fontanoperation (n=50), Untersuchungen nach Operation einer linksventrikulären Ausflußbahnobstruktion (n=22), sowie sonstige Operationen (n=18). Residuelle Defekte, welche zu sofortiger Reoperation in der gleichen Sitzung Anlaß gaben, wurden bei 4 Patienten (1,7%) gefunden, unbedeutende residuelle Defekte, die keine Reoperation erforderlich machten bei 6 Patienten (2,6%). In 2 Fällen wurden bei korrigierten kompletten AV Septumdefekten unmittelbar postoperativ geringe Insuffizienzen der linken AV Klappe gesehen, welche später so an Schweregrad zunahmen, daß spätere Reoperationen notwendig wurden. Die durch die transösophageale Echokardiographie erhobenen Befunde wurden durch direkte blutige Druckmessungen und Kontrastinjektion in den linken Vorhof ergänzt. Wir schlußfolgern, daß die intraoperative Echokardiographie klinisch sinnvolle Informationen liefern kann, wenn die erhobenen Befunde im Kontext mit den oben aufgeführten anderen Messungen interpretiert werden.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    International Journal of Radiation Applications & Instrumentation. Part D, 12 (1986), S. 137-140 
    ISSN: 1359-0189
    Keywords: Lexan Plastic Track Detectors ; Ultraviolet Light Enhancement
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 98 (1994), S. 6790-6796 
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 79 (2001), S. 1730-1732 
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: An apertureless optical near-field scanning microscope system has been created by combining a commercially available atomic force microscope and an ellipsometer without any prior changes in design of the respective devices. In preliminary experiments, an optical resolution of about 20 nm (λ/32) has been achieved using the combined microscope. The intensity of the measured optical signal has been found to be a periodic function of the thickness of the sample. Moreover, the period of this function is dependent upon the local optical properties of the sample material. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Nuclear Tracks 5 (1981), S. 403 
    ISSN: 0191-278X
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Nuclear Tracks 5 (1981), S. 406-407 
    ISSN: 0191-278X
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Nuclear Instruments and Methods 77 (1970), S. 71-77 
    ISSN: 0029-554X
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Physics
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    International Journal of Radiation Applications & Instrumentation. Part D, 12 (1986), S. 428-430 
    ISSN: 1359-0189
    Keywords: Cosmic Rays ; Heavy Ions ; Plastic Track Detectors ; Trapped Radiation Belts
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Type of Medium: Electronic Resource
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  • 10
    ISSN: 1435-1285
    Keywords: Key words Large atrial septal defects – interventional occlusion – Amplatzer Septal Occluder – follow-up ; Schlüsselwörter Große Vorhofseptumdefekte – Interventioneller Verschluss – Amplatzer Septal Occluder – Nachbeobachtung
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Viele verschiedene Systeme für den Verschluss von Vorhofseptumdefekten (ASD) kamen in den letzten Jahren zum Einsatz, deren Gebrauch meist auf Defektgrößen bis 20mm Durchmesser limitiert war. Wir berichten über unsere klinische Erfahrung beim Verschluss von ASD mit einem Durchmesser größer 20 mm mit dem Amplatzer Septal Occluder (ASO).¶   Methode: Ein im Defekt platzierter Ballonocclusionskatheter wurde soweit inflatiert, dass eine Kerbe im Ballon als Grundlage für die echokardiografische als auch radiologische Bestimmung des gedehnten Durchmessers entsteht. Ein ASO¶2–4mm größer als der gedehnte Durchmesser wurde durch 9–12 French messende lange Schleusen implantiert. Im Unterschied zum Verschluss kleinerer Defekte wurde der ASO erst nach vollständiger Entwicklung des linksatrialen Schirmchens und des Verbindungsstents unter Ausnutzung der maximalen Auflagerungsfläche und Zentrierungseigenschaft in den Defekt gezogen, danach der rechtsatriale Schirm entfaltet und durch zügiges Vorschieben der Schleuse und des Implantationsdrahtes in Richtung Septum aktiv konfiguriert. Eine Implantation wurde nur durchgeführt, wenn der den Defekt umgebende Rand außer aortal, anterior minimal 7mm maß. Nach Implantation wurde mit einem extensiven „Minnesota wiggle” die mechanische Stabilität des ASO überprüft. Eine Freisetzung erfolgte nur, wenn kein oder nur minimaler Restshunt durch den zentralen Verbindungsstent im Farbdoppler zu erkennen war, ansonsten erfolgte eine konsequente Repositionierung.¶   Ergebnisse: Von 352 Patienten (P) mit interventionellem ASD-Verschluss mit einem ASO hatten 70 P (Alter 1,1–77,3 J) einen Defekt größer 20 mm (Median 22 mm (20–36), 25/75% Quartile = 20/26 mm). Der mittlere Shunt betrug Qp:Qs 2,1:1 (0,7–3,9:1), mittlere Durchleuchtungszeit 10,9 min (0–63). Ein vollständiger Verschluss war bei 85,7/93,1/100% der P nach 3 Monaten, ¶1 und 2 Jahren zu beobachten. Außer den 3 P mit chronischem Vorhofflimmern hatten nur 5P passagere Arrhythmien, 2 periprozedural und 3 innerhalb der ersten 3 Monate nach Verschluss, behandelt mit β-Blocker. Bei einem P kam es wegen eines ungenügend ausgebildeten posterioren Randes zur Akutembolisation des ASO mit nachfolgender chirurgischer Explantation und Defektverschluss. Trotz des „Überdimensionierens” des ASO kam es zu keiner Fehlkonfiguration des Implantats.¶   Schlussfolgerung: Der Verschluss von Vorhofseptumdefekten mit einem Durchmesser größer 20mm ist ohne höhere Komplikationsrate sicher und effektiv durchführbar, wenn man die modifizierten Implantationskriterien berücksichtigt. Passagere Arrhythmien stellen keine besondere Problematik dar.
    Notes: Summary Over the last few years, various devices for the interventional closure of atrial septal defects (ASD) up to a diameter of 20mm have been developed. We report our clinical experience in closing ASD with a diameter larger than 20mm diameter with the Amplatzer Septal Occluder (ASO).¶   Method: The stretched diameter of the ASD was measured by inflating a sizing balloon within the defect until an indentation in the circumference in the balloon could be observed. An ASO with a stent diameter 2–4mm larger than the indentation in the circumference of the balloon was chosen and implanted via 9–12 French sheaths. In contrast to the closure of smaller defects, pullback of the device onto the atrial septum was only performed when the connecting stent of the ASO was completely deployed in order to achieve maximal centering characteristics and optimal support of the retention skirt of the left atrial disc on the edges of the defect. Only then was the right atrial disc deployed and actively configured by advancing the sheath and the delivery cable against the atrial septum. Implantation was only attempted if the atrial septal rims (except the anterior rim around the aorta) measured more than 7mm by echocardiography to avoid injury or disturbance of sensitive intracardiac structures. After placement, the fixation of the device and the mechanical stability was proven by an extensive “Minnesota wiggle”. The ASO was released only when TEE showed no or a trivial residual color flow through the connecting stent; otherwise repositioning was performed.¶   Results: Out of 352 patients (P) with successful closure of interatrial defects, 70 P (age: 1.1–77.3 years) had stretched defects larger than 20mm diameter (median 22mm diameter (20–36), 25/75% quartiles=20/26mm). Mean shunt size was Qp:Qs 2.1:1 (0.7–3.9:1), mean fluoroscopy time 10.9min (0–63). Complete closure could be achieved in 85.7/93.1/100% after 3 months, ¶1 and 2 years, respectively. Besides 3P with persistent atrial fibrillation, only 5 P showed transient atrial tachyarrhythmias, 2 only periprocedural and 3 within the first 3months after implantation were treated with β-blocker. In one patient, an acute embolization of the device occurred because a diminished posterior rim was not visualized by a monoplane TEE probe necessitating surgical explantation and defect occlusion. Despite oversizing the device, no “mushrooming” misconfiguration were observed.¶   Conclusion: Transcatheter closure of large atrial septal defects with the Amplatzer Septal Occluder is feasible, safe and effective. Risk of complications do not seem to occur more frequently than after closure of smaller defects if one adheres to certain sizing and implantation measures. The incidence of transient atrial tachyarrhythmias seems to be low.
    Type of Medium: Electronic Resource
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