UCL University College London Eprints
UCL Eprints collects the work of UCL researchers and makes it freely available over the web, helping the worldwide scholarly community to discover UCL research. Institutional repositories like UCL Eprints complement the traditional academic publishing and scholarly communications processes. They raise the visibility of research and help to maximise its impact. UCL researchers are encouraged to deposit a copy of each journal article, conference paper, working paper, and any other research output, in the UCL Eprints at the earliest opportunity, ensuring that their research reaches as wide an audience as possible.
Clinical features and outcome of patients with thin and ultrathin glomerular membranes. - Goel, S; Davenport, A; Goode, NP; Shires, M; Hall, CL; Harrison, PR; Maciver, AG
There is considerable disagreement regarding the natural history of renal disease associated with thin glomerular basement membranes (TGBM). We followed 43 patients (19 male), mean age 41.6 years (range 19-73) for a mean of 88 months (48-140). TGBM was recognized in adults when glomerular basement membrane thickness, measured from multiple sites in electronmicrographs of renal biopsy tissue as the harmonic mean, was < 320 nm. At presentation, 95% had microscopic haematuria, 12% macroscopic haematuria, 14% loin pain, 28% proteinuria, and 14% hypertension. There was no difference in GBM width between the sexes (male 258 nm vs. female 251 nm) but...
Aortic valve disease in patients with Wegener's granulomatosis. - Davenport, A; Goodfellow, J; Goel, S; Maciver, AG; Walker, P
Wegener's granulomatosis usually affects the upper and lower respiratory tract as well as the kidney. Cardiac involvement is rare, although electrocardiographic abnormalities, coronary artery vasculitis, cardiac arrhythmias, and myocardial infarction have been described. We report two cases of aortic valve disease associated with Wegener's granulomatosis that were progressive despite clinical remission of Wegener's disease in both patients. One patient has undergone successful valve replacement and the other is currently awaiting surgery. Aortic valve histopathology showed myxoid degeneration that was most likely due to previously active vasculitis affecting the vessels of the aortic wall and valvular necrosis with subsequent progressive degeneration...
Measurement of malondialdehyde as a marker of oxygen free radical production during renal allograft transplantation and the effect on early graft function - Davenport, A; Hopton, M; Bolton, C
We prospectively measured malondialdehyde (MDA), a marker of free radical oxygen damage during 44 renal transplant operations. When corrected for intra-operative changes in plasma volume, there was a significant increase in the ratio of MDA to total cholesterol (x10 3), from a median of 0.32 (0.24-0.44) (interquartile range) to 0.39 (0.31-0.50) at 30 minutes following reperfusion, p < 0.01 and to 0.36 (0.31-0.51) after 60 minutes, p < 0.01; whereas there was no intra-operative increase in MDA in 10 patients undergoing routine elective surgery, who acted as controls. The change in MDA/cholesterol ratio at both 30 and 60 minutes following...
Effect of renal replacement therapy on patients with combined acute renal and fulminant hepatic failure. - Davenport, A; Will, EJ; Davison, AM
The mortality of patients with combined acute hepatic and renal failure remains high. Previous studies have reported both patient morbidity and mortality directly attributable to the use of extracorporeal circuits used to treat renal failure. We investigated the effect of various modes of renal replacement therapy in 30 consecutive patients referred with both fulminant hepatic and acute renal failure. Cardiac output decreased during the first hour of 30 intermittent machine haemofiltration treatments, by 15 +/- 3%, as did tissue oxygen delivery, 16 +/- 3% and tissue oxygen uptake, 13 +/- 4%, whereas there was no significant change during 30 continuous...
Effect of aluminum mobilization on hemoglobin during the first six months after transplantation. - Davenport, A; Newton, KE; Toothill, C; Will, EJ; Davison, AM
We prospectively monitored 38 patients for the first six months following successful renal cadaver allograft transplantation. Hemoglobin increased from a mean of 8.2 +/- 0.3 g/dl to 13.4 +/- 0.3 g/dl (SEM), P < 0.001, plasma aluminum decreased from 1.3 +/- 0.2 mumol/liter to 0.46 +/- 0.04 mumol/liter, P < 0.001, and urinary aluminum excretion which peaked at one week post-transplant, 5.5 +/- 1.3 mumol/24 hr decreased to 1.8 +/- 0.3 mumol/24 hr, P < 0.001. Prior to transplantation 22 patients had been prescribed aluminum-containing phosphate binders. Following transplantation this group had persistently greater plasma aluminum and urinary aluminum concentrations...