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  • 1
    Digitale Medien
    Digitale Medien
    Thermal Coronary Angiography for Intraoperative Patency Control of Arterial and Saphenous Vein Coronary Artery Bypass Grafts: Results in 370 Patients (1995)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of cardiac surgery 10 (1995), S. 0 
    Details
    ISSN: 1540-8191
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Medizin
    Notizen: Background and aim of the study: Early graft failure is often associated with technical failures and is therefore potentially avoidable. We used thermal coronary angiography (TCA) for intraoperative graft patency control in 370 patients undergoing routine coronary artery bypass graft surgery to determine whether consequent intraoperative bypass graft control may result in improved patency rates. Methods: The temperature differences generated in between the myocardium and the grafts by injecting cold cardioplegic solution into the proximal end of a vein graft or by warmer blood running through an internal thoracic artery (ITA) graft were detected using three different infrared camera systems. The resulting “heat pictures” were evaluated for anastomotic patency and to outline graft anatomy. Results: A total of 693 vein grafts were visualized. In 9.4% TCA failed to produce usable images. In the remaining 628 grafts, TCA revealed intraoperative patency in 98.8%. Out of 370 ITA grafts, only 14 could not be sufficiently visualized by TCA. Nineteen ITA occlusions (5.3%) were found: 5 intimal flaps; 11 suture imposed strictures; and 3 proximal ITA occlusions. All occluded grafts were subsequently revised or replaced. All sequential ITA as well as 15 right ITA grafts proved to have patent anastomoses. Conclusion: Using TCA an early graft dysfunction rate of 1% for vein grafts and 5.3% for ITA grafts could be demonstrated. Most occlusions were due to technical mistakes at the distal anastomosis. TCA outlines grafts and the attached coronaries by temperature differences without the need for a contrast agent. There is no interference with the surgical procedure. It is an ideal, noninvasive method to immediately document the success or failure of myocardial revascularization.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1540-8191.1995.tb01233.x
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  • 2
    Digitale Medien
    Digitale Medien
    Recanalization of Aged Venous Thrombotic Occlusions with the Aid of a Rheolytic System: An Experimental Study (1996)
    Springer
    CardioVascular & interventional radiology 19 (1996), S. 255-259 
    Details
    ISSN: 1432-086X
    Schlagwort(e): Key words: Venous thrombosis—Experimental study— Percutaneous transluminal thromboembolectomy
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract Purpose: The suitability of a rheolytic system for recanalization of aged venous thrombotic occlusions was tested in an animal experiment. Methods: The system consists of a flush-suction catheter and a high-pressure liquid pump. Thrombosis was experimentally induced in 13 venous segments of 10 adult goats. Results: After a mean period of 12 days, a complete thrombectomy using the flush-suction system was achieved in 12 cases. No complications such as perforation or dissection were observed. Conclusion: This system seems to be an appropriate device for percutaneous transluminal venous thrombectomy, even in older occlusions.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s002709900051
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