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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 71 (1993), S. 466-470 
    ISSN: 1432-1440
    Keywords: Doppler ultrasound ; Oximetry ; Peripheral vascular disease ; Diabetic foot ; Neuropathy ; Reactive hyperemia
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Necrotic ulcers of the feet are a dangerous complication of the diabetic foot syndrome. Besides peripheral vascular disease (PVD) peripheral neuropathy is an important factor in the pathogenesis of necroses. We examined whether the reserve of circulation during reactive hyperemia at the feet of patients with type I diabetes mellitus with abnormal blood flow (n =17) is decreased compared with diabetic (n =14) and nondiabetic (n = 20) controls. Further we analyzed whether there is a correlation with the oxygen supply of the foot. PVD was excluded by clinical check-up, oscillography, and Doppler ultrasound. The reserve of circulation of the foot was measured during reactive hyperemia and oxygen supply of the foot by oximetry. Abnormal blood flow of the foot was diagnosed by the pulsation index. On examination it was found that the reserve of circulation of diabetic feet with abnormal blood flow is about 52% less than in diabetic and about 50% less than in nondiabetic controls (P〈0.005). The decreased reserve of circulation correlates with the oxygen supply of the feet; this is about 21% less compared to diabetic feet with normal blood flow and about 16% less in comparison to nondiabetic feet. The present study shows that diabetic feet suffer from disturbed circulation although there is no evidence of PVD. This disturbed circulation is correlated with a decreased oxygen supply of the feet. Hypoxia during strain could be of great importance in the pathogenesis and treatment of necrotic ulcers of diabetic feet.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1433-0474
    Keywords: Schlüsselwörter Aortenisthmusstenose ; Subarachnoidalblutung ; Aortendissektion ; Aortenruptur ; Key words Aortic coarctation ; Subarachnoidal hemorrhage ; Aortic rupture ; Aortic dissection
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Of four male patients with delayed diagnosis of aortic coarctation at an age between 11 years and 14 years 9 months, three presented with life-threatening complications like subarachnoidal hemorrhage in one patient, rupture of the dilated ascending aorta followed by aortic dissecation in the other and rupture of a poststenotic aneurysm of the descending aorta with perforation into the esophagus in the third. All patients were operated successfully. Postoperatively, they had severe arterial hypertension requiring antihypertensive medication. Discussion: Lack of subjective symptoms in these patients is due to the development of extensive collateral circulation. Early diagnosis of aortic coarctation is critical to prevent complications. Surgical correction of asymptomatic coarctation should be performed in the second year of life.
    Notes: Zusammenfassung Wir berichten über 4 männliche Patienten im Alter zwischen 11 Jahren und 14 Jahren, 9 Monaten, bei denen verspätet die Diagnose einer Aortenisthmusstenose gestellt wurde. Drei der Patienten kamen primär mit einer lebensbedrohlichen Komplikation der zuvor nicht erkannten Aortenisthmusstenose zur stationären Aufnahme. Es handelte sich hierbei 1 mal um eine Subarachnoidalblutung durch ein rupturiertes zerebrales Aneurysma, bei 1 anderen Patienten um eine Aortenruptur bei aneurysmatischer Erweiterung der Aorta ascendens, die von einer Aortendissektion gefolgt wurde sowie bei 1 Patienten um die Ruptur eines poststenotischen Aneurysmas der Aorta descendens in den Ösophagus. Alle 4 Patienten konnten erfolgreich operiert werden. Der postoperative Verlauf war jedoch immer durch einen schwer einstellbaren Hypertonus gekennzeichnet. Diskussion: Die verspätete Diagnose dieser Aortenisthmusstenosen ist auf die fehlende Symptomatik zurückzuführen, die auf der Entwicklung eines meist ausgeprägten Kollateralkreislaufs beruht. Prognostisch entscheidend ist die frühzeitige Diagnose. Die Korrekturoperation der asymptomatischen Aortenisthmusstenose sollte im 2. Lebensjahr erfolgen.
    Type of Medium: Electronic Resource
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