Search PubMed⌕ Search

Biomedical subjects

T J Neale

Publications and source records attributed to T J Neale.

At least 55 records · Page 3Linked to original sources

Netilmicin in the treatment of clinical peritonitis in chronic renal failure patients managed by continuous ambulatory peritoneal dialysis.

The efficacy and systemic absorption of netilmicin following intraperitoneal instillation were studied during ten episodes of clinical peritonitis in chronic renal failure patients managed by CAPD. Episodes were unselected for sensitivity of microorganism in vitro to netilmicin. Five subjects studied as inpatients had sequential dialysate and frequent plasma samples assayed for netilimicin up to 110 hours of therapy. Five patients who managed their peritonitis at home had dialysate and plasma netilmicin levels estimated at two and six days. In a dose of 10 mg/l, netilmicin was curative in the majority of patients (70%). Toxic blood levels were not found. Experience with netilmicin compared favourably with that observed in eight consecutive episodes of outpatient peritonitis managed with intraperitoneal cefamandole, the first line treatment for CAPD peritonitis in our unit (75% cure). No side effects were recorded with either agent. We conclude that netilmicin can be used effectively in the majority of microbiologically undifferentiated episodes of CAPD peritonitis, including in the home setting.

Absorption↗

Production of monoclonal antibody probes specific for nonbasement membrane glomerular capillary wall antigens in the rat.

To examine the characteristics of discontinuously represented antigens within the rat glomerular capillary wall, we have developed monoclonal antibodies against basement membrane-depleted glomerular plasma membrane preparations. These reagents exhibited granular binding patterns on normal rat glomeruli when examined by indirect immunofluorescence. By limited purification of the primary immunogen and the use of this material for the initial screening by micro-ELISA, the production and selection of monoclonal antibodies (McAbs) of the desired specificity was enhanced. Intrasplenic immunisation was usefully employed to reduce the time interval from immunisation to fusion without lessening the percentage of positive hybridomas generated. The potentiality for in situ immune responses to discretely arrayed non-basement membrane glomerular capillary wall antigens which produce granular immunofluorescence is further exemplified by these studies.

Animals↗

The immunochemical characterisation of circulating immune complex constituents in Candida albicans osteomyelitis by isoelectric focusing, immunoblot, and immunoprint.

Circulating immune complexes present in the serum of a patient with systemic lupus erythematosus, end-stage renal failure, and thoracic vertebral Candida albicans osteomyelitis were sequentially analysed by isoelectric focusing, immunoblotting, and immunoprinting. Candida antigens (including mannoproteins), Clq and C3 complement components, and specific anti-Candida antibody were detected within polyethylene glycol precipitated complexes. An antigen of 47K molecular weight was amongst those demonstrated by polyacrylamide gel electrophoresis to be present within the complexes. It has been proposed elsewhere that a serologic response to a 47K protein is predictive of recovery from Candida albicans infection. Free antibody had specificity for Candida antigens ranging in molecular weight from 18K to more than 100K including a 47K component. The analytical techniques employed allowed rapid and precise identification of the components of one particular immune complex system and will be widely applicable to the dissection of other diverse systems.

Adult↗

Candida albicans vertebral osteomyelitis in chronic renal failure.

Invasive candidal infections are encountered with increasing frequency in compromised hosts but bone infection is uncommon. A woman with systemic lupus erythematosus and end-stage renal failure managed by continuous ambulatory peritoneal dialysis developed a painful thoracic kyphosis and a lytic lesion in the vertebral bodies of T10 and T11. Blood cultures were sterile but bone biopsy material contained Candida albicans which also grew on culture. Circulating immune complexes were measured in high levels and contained candida antigens and specific anti-candida antibody as determined by isoelectric focusing, immunoblotting and immunoprinting techniques. Pain persisted after anti-fungal therapy had sterilized the lesion necessitating surgical excision of affected vertebrae, kyphosis correction and iliac crest bone grafting. The titres of circulating immune complexes and anti-candidal precipitins closely paralleled the clinical course.

Adult↗

Endstage renal failure due to polycystic kidney disease managed by continuous ambulatory peritoneal dialysis.

Over a five and one half year period, four of nine patients with endstage renal failure due to polycystic kidney disease managed by continuous ambulatory peritoneal dialysis (CAPD) developed peritonitis following intestinal perforation. Two patients had colonic perforation associated with diverticular disease, one necrosis of the terminal ileum, and one acute appendicitis. Two of the patients died subsequent to these complications. The survivors had early transfer to haemodialysis. In contrast, over the same period, only two of 125 patients with renal failure due to other causes and managed by CAPD had acute intestinal perforation. In both cases this was associated with acute appendicitis. Both patients survived. All episodes of peritonitis in CAPD patients with polycystic kidneys demand very close monitoring, cessation of CAPD, and early surgical intervention. CAPD is relatively contraindicated in such patients.

Female↗

Pulmonary function in chronic renal failure patients managed by continuous ambulatory peritoneal dialysis.

The influence of intraperitoneal fluid on pulmonary function was studied in 20 unselected continuous ambulatory peritoneal dialysis (CAPD) patients, all but one of whom had at least one cardiorespiratory disorder. Measurements of pulmonary function were made with the abdomen empty and following the instillation of 2 1 of dialysis fluid (full). Functional residual capacity fell with the peritoneal cavity full, due to decreases in residual volume, and expiratory reserve volume, but there was a corresponding increase in inspiratory capacity. The vital capacity remained unchanged and the total lung capacity fell only slightly. The FEV1, diffusing capacity, and distribution of ventilation were unaltered. These findings can be attributed to an increase in intra-abdominal pressure resulting in elevation of the diaphragm and increased diaphragmatic contractility. We conclude that the instillation of 21 of dialysis fluid in CAPD patients with cardiorespiratory disease does not result in a clinically significant deterioration in these aspects of pulmonary function.

Adult↗

Continuous ambulatory peritoneal dialysis and acute appendicitis.

Peritonitis in patients on continuous ambulatory peritoneal dialysis while usually due to contamination of the dialysis line by skin organisms may also be due to intra-abdominal pathology. Three cases are described in whom peritonitis was due to acute appendicitis. The recognition of an intra-abdominal source of infection in patients on CAPD is discussed, and surgical management stressed.

Acute Disease↗

Exercise capacity in chronic renal failure patients managed by continuous ambulatory peritoneal dialysis.

Exercise capacity is documented to be poor in patients with end stage renal failure undergoing regular hemodialysis, but there is little information about exercise capacity in patients on continuous ambulatory peritoneal dialysis (CAPD). We studied a group of 18 patients undergoing CAPD, with a variety of cardiorespiratory disorders, using a progressive load treadmill exercise test. The influence of intraperitoneal fluid on work capacity was also assessed. The mean maximum oxygen uptake (VO2max) of the CAPD patients was reduced considerably (14.6 ml kg-1 min-1) compared with matched control subjects (33.6 ml kg-1 min-1). This corresponded to the difficulty experienced by these patients in carrying out daily activities. There was no significant change in VO2max or in maximum heart rate with the peritoneal cavity full. We conclude that physical fitness is poor in CAPD patients and that the infusion of dialysis fluid into the peritoneal cavity does not affect physical work capacity further.

Adult↗

An immunopathologic study of a 330-kD protein defined by monoclonal antibodies and reactive with anti-RTE alpha 5 antibodies and kidney eluates from active Heymann nephritis.

There is evidence indicating that the glomerular Ig deposits of Heymann's nephritis (HN)--a model of epimembranous glomerulonephritis--may be formed at least in part in situ by binding of free circulating antibody with brush border (BB) antigen expressed by glomerular epithelial cells. In this work, we provide evidence that a 330-kD protein defined by seven monoclonal antibodies is responsible for HN. 1) Ig eluted from glomeruli of rats with HN induced classically with crude BB preparation bind specifically the 330-kD antigen; 2) passive immunization with monoclonal antibodies induces epimembranous glomerular Ig deposits; 3) active immunization with the 330-kD antigen induces proteinuric glomerulonephritis; 4) the 330-kD antigen was present in the nephritogenic preparation purified by Edgington, Glassock, and Dixon, because it was identified by the corresponding heterologous antisera. These results, obtained by a completely different approach, confirm and extend those of Kerjaschki and Farquhar and provide a link with the classical studies on HN.

Animals↗

Tubular antigen-associated renal disease in New Zealand white rabbits.

Rabbits immunized with autologous renal tubular antigen (Fx1A) developed tubulointerstitial nephritis whereas sheep anti-Fx1A antibody administered i.v. produced glomerulonephritis (GN). This lesion showed heavy granular glomerular deposition of immunoglobulin and subepithelial electron dense deposits, early proteinuria, leucocyte independence and a temporal pattern of quantitated glomerular antibody binding distinct from that reported to occur in passive Heymann's nephritis in rats. Isoelectric focusing followed by immunoblotting of deoxycholate-soluble Fx1A antigens with the heterologous and autologous antibodies, indicated species differences in epitope recognition which could account for dissociation between the two models.

Animals↗

Parathyroid surgery in chronic renal failure.

In hyperparathyroidism associated with endstage renal failure, either subtotal, or total parathyroidectomy with autotransplantation have been advocated as potentially curative for those patients non-responsive to medical therapy. Seventeen such patients managed by the Wellington renal unit were reviewed as to indications for, and responses to, surgery. Itch, psychiatric symptoms, joint ache, muscular weakness, gritty eyes and thirst were the major symptoms for which surgery was recommended. Hypercalcaemia (universal in women) and deterioration in bone radiology were additional indications for operation. All showed remarkable postoperative improvement. Symptomatic hypocalcaemia was significant in 41%. This observation has led to intensified pre- and postoperative vitamin D and calcium therapy. Postoperative radiologic improvement at three months was apparent in 80% of patients. We advocate subtotal parathyroidectomy as the effective surgical treatment of choice for uraemic hyperparathyroidism.

Adult↗

T lymphocyte participation in antibody-induced experimental glomerulonephritis.

Macrophage accumulation is a feature of some aggressive forms of human and experimental glomerulonephritis (GN). Both antibody Fc components and T cells may cause macrophage accumulation; however, there has been no previous demonstration of T cells at the site of injury in GN, although some indirect evidence of their possible participation has been reported. Specific monoclonal anti-rat T lymphocyte antibodies W3/13, W3/25, and Ox8 were used to demonstrate T cells within the glomeruli of rats with an augmented autologous anti-GBM GN, by indirect immunofluorescence. The injury in this model has been shown to be mediated by macrophages. The T cell infiltrate consisted mainly of T helper cells, was maximal 24 hr after induction of the disease and clearly preceded the peak influx of macrophages and glomerular damage. Suppression of T cell function using cyclosporin prevented T cell accumulation and the subsequent macrophage-induced injury. Glomerular T cells were not seen in passively induced GN. These studies support a role for cell-mediated immunity in attracting macrophages and initiating injury in experimental anti-GBM antibody-induced GN.

Animals↗

Comparison of blood gas and pH values obtained from arteriovenous fistulae and femoral arteries in chronic renal failure patients managed by hemodialysis.

The validity of obtaining blood directly from arteriovenous (a-v) fistula for blood gas and pH measurements in patients undergoing hemodialysis was examined. In such patients, blood samples were taken simultaneously from both the arterial and venous lines within the a-v fistula and from a femoral artery. We conclude that for clinical application sampling from either the arterial or venous line within an a-v fistula cannot be used for accurate determination of arterial blood gas and pH values. Possible reasons for the differences observed between the values obtained from the alternative sampling sites are suggested. If blood gas and pH measurements are required during hemodialysis, direct arterial puncture must be made to obtain an accurate result for clinical use. However, for sequential comparative studies of acid-base metabolism or respiratory function while on dialysis, repetitive fistula sampling appears valid.

Adult↗

Subclavian vein catheterisation for haemodialysis.

Immediate access to the circulation for haemodialysis may be necessary in patients with acute renal failure or when end stage renal disease presents acutely. Vascular access may be required in patients treated by continuous ambulatory peritoneal dialysis if that technique is interrupted or, following failure of an arteriovenous fistula in patients on maintenance haemodialysis. Haemodialysis via a catheter in the subclavian vein meets these needs. Our experience with 67 patients over two years confirmed the safety and reliability of this means of access. Benefits included easy, rapid catheter placement, full patient mobility, allowing outpatient dialysis where appropriate, and the sparing of peripheral vessels for future access. With careful attention to technique by experienced personnel complications are largely preventable.

Acute Kidney Injury↗

Acute renal failure following near drowning in salt water.

Two young men swallowed and inhaled salt water, suffered cold exposure and an undertermined degree of body trauma, in separate incidents. Severe acute oliguric renal failure followed in both, requiring dialytic therapy. Single needle subclavian intermittent haemodialysis allowed ambulatory outpatient management. The risk of acute renal failure following even brief sea water immersion is emphasised and the value of ambulant subclavian haemodialysis in the management of acute renal failure illustrated.

Acute Kidney Injury↗