Showing papers by "Leicester General Hospital published in 2004"

Detection of curcumin and its metabolites in hepatic tissue and portal blood of patients following oral administration.

Abstract: Studies in vitro and in animal models of colorectal and hepatocellular cancers suggest that curcumin is an effective chemopreventive agent. In this pilot trial, we investigated whether oral administration of curcumin results in concentrations of the agent in normal and malignant human liver tissue, which are sufficient to elicit pharmacological activity. In total, 12 patients with hepatic metastases from colorectal cancer received 450-3600 mg of curcumin daily, for 1 week prior to surgery. Levels of curcumin and its metabolites were measured by HPLC in portal and peripheral blood, bile and liver tissue. Curcumin was poorly available, following oral administration, with low nanomolar levels of the parent compound and its glucuronide and sulphate conjugates found in the peripheral or portal circulation. While curcumin was not found in liver tissue, trace levels of products of its metabolic reduction were detected. In patients who had received curcumin, levels of malondialdehyde-DNA (M(1)G) adduct, which reflect oxidative DNA changes, were not decreased in post-treatment normal and malignant liver tissue when compared to pretreatment samples. The results suggest that doses of curcumin required to furnish hepatic levels sufficient to exert pharmacological activity are probably not feasible in humans.

Trends in service use and treatment for mental disorders in adults throughout Great Britain.

Abstract: Background Trends in health treatments and outcomes in the general population may be used to monitor achievement of health targets.Aims To investigate changes in mental health services and treatment in Britain over a 7-year period.Method National surveys of psychiatric morbidity were completed in 1993 and 2000 in households throughout Great Britain. Standardised interviews were used to establish psychiatric case status and service and treatment utilisation in adults aged 16-64 years.Results Use of psychotropic medication doubled in those designated as psychiatric cases. In the non-case-status population antidepressant use rose from 0.16% in 1993 (95% CI 0.07-0.25) to 2.02% in 2000 (95% CI 1.69-2.35). However, the overall prevalence of neurotic and psychotic disorder hardly changed from 1993 to 2000. Use of specialised 'talking treatments' did not increase significantly, except in the non-case group.Conclusions Treatment with psychotropic medication alone is unlikely to improve the overall mental health of the nation. A policy based almost exclusively on treatment of identified cases should be augmented by preventive approaches.Declaration of interest None. Funding detailed in Acknowledgement.

A prospective study to determine the association between physical symptoms and depression in patients with advanced cancer.

Abstract: Depression is a common symptom in patients with advanced cancer and patients who are depressed may also have physical symptoms which are difficult to palliate and which improve as their depression is appropriately treated. This study was carried out to determine if there was an association between depression and physical symptoms in patients with advanced cancer and to establish whether a seven-item verbal rating scale asking patients to verbally rate the severity of physical symptoms together with low mood could be used to screen for depression. The scale was validated against a semi-structured clinical interview according to DSM IV criteria. Seventy-four patients participated with an age range of 28-92 years. All patients had an ECOG performance status of two or three. The prevalence of major depression in this study was found to be 27% (95% C.I. 17-37%). The mean score on the verbal rating scale was 28.77 (median score 29.5) (95% C.I., 26.23 - 31.31; range 0-65). A cut-off of > or = 30 gave a sensitivity of 65% and specificity of 59%, with positive and negative predictive values of 37% and 82% respectively. The verbal mood item alone had an optimal cut-off point of 3, with a sensitivity of 80% and specificity of 43%. Patients diagnosed as being depressed according to psychiatric interview rated each symptom higher than nondepressed patients. The verbal mood item and total verbal rating score correlated with a high significance (rs = 0.607, P < 0.01), implying a relationship between a patient's subjective mood state and other symptoms. Both using the verbal scale and asking patients to verbally rate their mood alone had poor efficacy as a screening tool. However, there is a close association between physical symptoms and the presence of depression in palliative care patients.

Predictive value of the duration of sciatica for lumbar discectomy: A PROSPECTIVE COHORT STUDY

Abstract: The optimum timing of lumbar discectomy for sciatica is imprecise. We have investigated a number of prognostic factors in relation to the outcome of radiculopathy after lumbar discectomy. We recruited 113 consecutive patients of whom 103 (91%) were followed up at one year. We found a significant association between the duration of radiculopathy and the changes in the Oswestry Disability Index score (p = 0.005) and the low back outcome score (p = 0.03). Improvement in pain was independent of all variables. Patients with an uncontained herniated disc had a shorter duration of symptoms and a better functional outcome than those with a contained herniation. Our study suggests that patients with sciatica for more than 12 months have a less favourable outcome. We detected no variation in the results for patients operated on in whom the duration of sciatica was less than 12 months.

A systematic approach to analyse health-related quality of life in multiple sclerosis: the GEDMA study.

Abstract: Objective: To describe aholistic and comprehensive approach to the assessment of sufferer’s perceptions of health-related quality of life (HRQoL) in acohort of multiple sclerosis (MS) patients. Methods: The GEDMA (Grupo de Enfermedades Desmielinizantes de Madrid, in Spanish) study is an ongoing longitudinal survey using quantitative and qualitative methodologies. The baseline cohort consisted of a large sample of MS patients recruited from 13 hospitals in Madrid, Spain. Using a standardized protocol we collected data concerning the sociodemographic and health status characteristics of patients, as well as implementing a modified Spanish version of the Functional Assessment of Multiple Sclerosis quality of life instrument. Primary caregivers were interviewed using a specific protocol combined with the Zarit Burden Interview. Results: The index cohort comprised 371 MS patients (68.7% female) of mean age 38.9 9/0.9 years. Age, sex and clinical form distribution were similar to other MS population-based surveys. There were 258 (69.5%) relapsing i/remitting (RR) MS patients and 113 (30.5%) progressive MS patients. More than one-third of the married patients with progressive MS and almost a quarter of the RRMS patients separated or divorced following a diagnosis of MS; 71.3% of the progressive MS patients as well as 65.8% of the RRMS patients were unemployed as aconsequence of the disease. Qualitative analysis showed that friendship and family relationships and occupational status were the most significant dimensions influenced by MS. On the other hand, the speech analysis of primary caregivers showed that emotional burden was related to patients’ physical disability. Furthermore, primary caregivers described the influence of MS on their own occupational status, their nonacceptance of the disease, a perception of alack of support by other members of the family as well as a‘ selfish and intransigent’ attitude of the patients themselves. Conclusions: The analysis of the GEDMA cohort provides valuable information that helps clarify the impact of MS on patients’ HRQoL. Multiple Sclerosis (2004) 10, 47i/54

Impact of a critical care outreach team on critical care readmissions and mortality.

Abstract: Aims: The aim of a critical care outreach team is to facilitate discharges from critical care beds, educate ward staff in the management of deteriorating patients, facilitate transfer to critical care and reduce readmission rates to critical care. Although intuitively a good idea, there are few data to support outreach in terms of reducing the readmission rate to critical care and subsequent patient mortality. This retrospective observational study attempted to determine the change in the critical care readmission rate, an indicator of the quality of critical care, critical care mortality and in-hospital mortality following the introduction of a critical care outreach team in a major teaching hospital. Methods: A retrospective review of 1380 discharges from critical care was undertaken and the readmissions identified (n = 176). Readmission rate, mortality and other demographic data were compared between the pre and postoutreach periods. Results: Critical care mortality, in-hospital mortality and 30-day mortality were all reduced in the postoutreach period amongst readmissions to critical care. There was also a decease in the overall mortality of all patients admitted to critical care. There were no apparent causative factors for this reduction in mortality before and following outreach. Conclusions: There are many confounding factors in assessing the impact of outreach teams in hospitals. This study tentatively concludes that outreach teams may have a favourable impact on mortality rate amongst readmissions to critical care, but more data is needed from multicentre trials.

A comparison of renal preservation by cold storage and machine perfusion using a porcine autotransplant model.

Abstract: BACKGROUND Pulsatile machine perfusion offers theoretical advantages as a method of preserving kidneys before transplantation. This may be particularly the case for organs taken from non-heart-beating donors (NHBD), but there is still a lack of data to support this view. The aim of this study was to compare the effectiveness of static cold storage in ice (CS) and hypothermic pulsatile machine perfusion (MP) as methods of renal transplant preservation. METHODS Groups of large white pigs (n=5) underwent left nephrectomy after warm ischemic times (WIT) of 0 or 30 min. Kidneys were preserved by CS or by cold (3degrees-8degreesC) MP for 24 hr. The left kidney was then autotransplanted into the right iliac fossa and an immediate right nephrectomy was performed. Renal function was assessed daily for 14 days. RESULTS Fourteen-day animal survival rates for 0 and 30 min WIT were four of five and one of five after both CS and MP. In the zero WIT groups, there was improved recovery of renal function after MP (area under the creatinine curve, 4,722+/-2,496 [MP] vs. 8,849+/-2,379 [CS]; P<0.05). MP did not improve renal function after 30 min of WIT (mean daily area under the creatinine curve, 1,077+/-145 [MP] vs. 1,049+/-265 [CS]). CONCLUSIONS In this model, MP improved 24-hr preservation of kidneys not subjected to warm ischemia (heart-beating donor model), but there was no evidence that MP was a better method of preservation than CS for kidneys exposed to 30 min of WIT (NHBD model).

Evaluation of the role of a specialist tracheostomy service. From critical care to outreach and beyond.

Abstract: The impact that a new specialist tracheostomy service, designed specifically for the care of patients with tracheostomies, was assessed in terms of type of tracheostomy tube used, time to first tube change, time to decannulation, and incidence of tracheostomy related complications in a teaching hospital with no on-site ear, nose, and throat facility. A total of 170 patients were studied. After service implementation, fewer patients (17.6%, n = 21) were discharged from the intensive treatment unit to the wards with tracheostomy tubes compared with the first group (39%, n = 20) (p = 0.006), and the number of tracheostomy related complications on the wards were significantly reduced (p = 0.031).

Distinguishing C1q nephropathy from lupus nephritis.

Abstract: Background 'Seronegative lupus nephritis' describes patients with renal histology typical of lupus nephritis who have no clinical or serological evidence of systemic lupus erythematosus (SLE). We report our experience in nine patients identified as having 'seronegative lupus nephritis' who met the diagnostic criteria for C1q nephropathy. Methods A retrospective review of clinical case notes and renal histology was carried out. Results We describe nine patients with C1q nephropathy in whom the diagnosis of 'seronegative lupus nephritis' was initially considered. All had renal histological features typical of lupus nephritis with 'wire loop' appearances on light microscopy, 'full house' immunoglobulin and complement deposition by immunoperoxidase, and electron-dense deposits in at least two glomerular locations. None of these nine patients developed clinical or serological evidence of SLE over a median follow-up of 6 years (range 0.1-9). There was no consistent evidence of a response to immunosuppressive therapy. In all cases, C1q staining was dominant on immunoperoxidase, and no tubuloreticular inclusions were seen. These appearances accord with previous descriptions of C1q nephropathy. Conclusions The implications of a diagnosis of lupus are considerable, and we propose that the term 'seronegative lupus nephritis' is unhelpful, and should be avoided when there is diagnostic uncertainty. The term C1q nephropathy should be preferred when these histological features are seen in the absence of overt lupus, when C1q deposition is dominant and when tubuloreticular bodies are absent. The clinical course in the cases reported here does not support the use of immunosuppressive therapy in C1q nephropathy.

Care of people dying with malignant and cardiorespiratory disease in general practice.

Abstract: SUMMARY Background: Provision of palliative care for people dying with malignant disease is a well-characterised aspect of general practice workload. The nature of end-of-life care of people with non-malignant disease is less well described. Aim: To compare the general practice care provided in the last year of life to people who died with malignant and with cardiorespiratory disease. Design: Case record review. Setting: Two Leicestershire general practices: one inner-city, one semi-rural; total practice population 26 000 people. Method: General practice review of the records of all people registered with the practices who died with malignant or cardiorespiratory disease between 1 August 2000 and 31 July 2002 to deter mine: cause and place of death, recorded comorbidity, palliative medication prescribed, number of consultations and continuity of care, receipt and duration of palliative care. Results: When compared with people who died with cardiorespiratory disease, those who died with malignant disease were more likely to have had a terminal phase of their illness identified and to have been prescribed more palliative drugs. Both groups consulted a similar number of times, experienced similar continuity of care, had similar comorbidity, and were equally likely to die at home. Conclusion: People who died with cardiorespiratory disease were less likely to be in receipt of formally identified terminal care and were likely to have had fewer drugs prescribed for palliation than people with malignant disease, yet they make similar demands of practices. They are likely to have unmet needs with respect to palliation of symptoms.

Risk factors and the prevalence of neurosis and psychosis in ethnic groups in Great Britain.

Abstract: Our aim was to examine whether variations in the prevalence of neurosis and psychosis between ethnic minorities throughout Great Britain are explained by social disadvantage. A total of 10,108 adult householders throughout Great Britain were assessed in a two-stage survey with the Revised Clinical Interview Schedule (CIS-R) and Psychosis Screening Questionnaire (PSQ). Respondents with a positive PSQ or who received a diagnosis of, or treatment for, psychosis were examined by a psychiatrist using the Schedules for Clinical Assessment in Neuropsychiatry (SCAN). Data on respondents’ preferred ethnic group were collapsed into four groups: Whites, African-Caribbean or Africans, south Asians and other. Ethnic grouping was strongly associated with: unemployment; lone parent status; lower social class; low perceived social support; poverty (indicated by lack of car ownership) and having a primary social support group of less than three close others. All these associations applied to the group Africans and Afro-Caribbeans, but only some applied to the other groups. No ethnic group had significantly increased rates of neurosis. Only the African-Caribbean group were at significantly increased risk of a psychotic disorder (odds ratio 4.55; 95% CI: 1.13, 18.30). After adjustment for risk factors, the odds of psychosis were lower (odds ratio 2.97; 95% CI: 0.66, 13.36). The excess of psychosis in Africans and Afro-Caribbeans in Great Britain appears to be partly explained by socio-economic disadvantage, but larger studies are needed to confirm this.

Prevalence of psychiatric disorder in Europe: the potential and reality of meta-analysis.

Abstract: Within the European Mental Health Status Project, over 200 psychiatric surveys concerning members of the European Union (plus Norway) were examined for their potential for meta-analysis with regard to prevalence of psychiatric disorders and basic demographic and social variables. The diversity of samples, methods, analysis and presentation was such that only data derived from GHQ-12 and CIDI studies could be used, and those relating to sex differentials only. The statistical program ‘Stata’ was used to compute odds ratios (with confidence intervals) for individual studies, and to produce fixed and random effects estimates of the pooled odds ratio for all studies together, and a measure of heterogeneity. Forrest Plots were also produced. Analysis of GHQ-12 data with a cut-off point of 4, indicating a current or recent ‘probable mental health problem’, showed, as expected, that women had higher prevalence rates than men. However, there was a relatively high heterogeneity score, suggesting that these studies may not be measuring the same thing. Analysis of CIDI results showed homogeneity for major depressive disorder within the last 12 months, with the risk for men about half of that for women. In terms of advancing epidemiological knowledge, the results are trivial, at most confirming what is already well known. However, the study shows the potential for pooled analysis, with much greater power in epidemiological investigation if consistency could be achieved in research. Various ways in which this might be done are discussed. It also shows the value of personal knowledge and personal networks in fields which are not well handled by electronic literature databases.

Tissue collection, transport and isolation procedures required to optimize human hepatocyte isolation from waste liver surgical resections. A multilaboratory study.

Abstract: Background: The European Center for Validation of Alternative Methods (ECVAM) has funded a prevalidation study in three laboratories (France, USA and UK) on the use of human hepatocyte cultures to predict cytochrome P-450 induction. Aims and Methods: As first stage of this prevalidation study, the purpose of the present work was to set criteria for optimization and harmonization of hepatocyte isolation from human tissue among laboratories to establish a routine procedure. This was achieved by combining and/or comparing the data generated by the two independent European laboratories (France and UK). Results: The results confirmed that surgical waste material is a valuable source for obtaining high quality hepatocytes under certain pre-, intra- and post-operative conditions: cell yield of viable hepatocytes was not significantly affected by age and sex of patients, nor indications for resection, steatosis or cholestasis. Cold ischeamia up to 5 hours did not influence viable cell yield allowing transport of material. Conclusion: The use of biopsy sizes between 50–100 g, cannulation with 2–4 cannulae, digestion with collagenase-containing digestion medium at a flow rate of 25 ml/cannula for 20 minutes, with cut surface being glued in order to reform Glisson's capsule, should optimize the total yield of viable human hepatocytes obtained per preparation of waste liver surgical resecitons.

A comparison of traditional open, minimal-incision donor nephrectomy and laparoscopic donor nephrectomy

Abstract: Laparoscopic donor nephrectomy (LDN) and minimal-incision donor nephrectomy (MILD) are less invasive procedures than the traditional open donor nephrectomy approach (ODN). This study compares donor and recipient outcome following those three different procedures. Sixty consecutive donor nephrectomies were studied (n = 20 in each group). Intra-operative variables, analgesic requirements, donor recovery, donor/recipient complications and allograft function were recorded prospectively. Operating and first warm ischaemia times were longer for LDN than for ODN and MILD (232+/-35 vs 121+/-24 vs 147+/-27 min, P < 0.001; 4+/-1 vs 2+/-2 vs 2+/-1 min, P < 0.01). Postoperative morphine requirements were significantly higher after ODN than after MILD and LDN (182+/-113 vs 86+/-48 vs 71+/-45 mg; P < 0.0001). There was no episode of delayed graft function in this study. Donors returned to work quicker after LDN than after ODN and MILD (6+/-2 vs 11+/-5 vs 10+/-7; P = 0.055). Donor and recipient complication rates and recipient allograft function were comparable. We concluded that MILD and LDN reduce postoperative pain and allow a faster recovery without compromising recipient outcome.

Accuracy of a 12-lead electrocardiogram in screening patients with suspected heart failure for open access echocardiography: a systematic review and meta-analysis.

Abstract: Aim: The aim of this study was to examine the usefulness of 12-lead electrocardiogram in screening patients with suspected heart failure for open access echocardiography. We carried out a systematic review and meta-analysis of published observational studies. Published studies were identified in the Medline and Embase databases, this was supplemented by key texts, personal reference collections and examining the cited references in the above sources. English language articles in which patients were referred from primary care with a presumptive diagnosis of heart failure to an open access echocardiography service were reviewed. We included studies that reported both electrocardiography findings and echocardiography as a reference standard. Primary outcome measures were sensitivity and specificity, metaanalysed simultaneously to produce a Summary Receiver Operating Characteristic (SROC) curve. Results: Four trials were identified which satisfied the inclusion criteria, including 1419 people with a potential diagnosis of heart failure referred for open access echocardiography. Estimates of sensitivity and specificity varied greatly in individual studies. The area under the SROC curve was 0.84 (95% CI: 0.33 to 1.00). Conclusion: A 12-lead electrocardiogram is an inadequate screening tool for identifying patients with suspected heart failure who require echocardiography. Further research is required to determine the usefulness of other screening strategies including B-type natriuretic peptide in screening patients with suspected heart failure who need referral for open access echocardiography.

Gefitinib (‘Iressa’, ZD1839) inhibits the growth response of bladder tumour cell lines to epidermal growth factor and induces TIMP2

Abstract: The effect of EGF stimulation and its inhibition with gefitinib ('Iressa', ZD1839), an epidermal growth factor receptor (EGFR) tyrosine kinase inhibitor, has been investigated in two EGFR-positive human bladder tumour cell lines, RT112 and RT4. The growth of RT112 cells in a medium containing 10% foetal bovine serum was inhibited by 50% with 10 microM gefitinib, whereas this dose completely inhibited RT4 cell growth. Cells were more sensitive to growth inhibition in the serum-free medium. Increased growth of cells in the serum-free medium was observed with 10 or 50 ng x ml(-1) EGF and the proliferative effect of EGF stimulation in both cell lines was inhibited in the presence of 1 microM, but not 0.1 microM gefitinib. Zymography of the conditioned medium from RT112 cells treated with EGF and gefitinib showed a decrease in matrix metalloproteinase 2 (MMP2) concentrations. Western blot analysis showed that tissue inhibitor of metalloproteinase 1(TIMP1) increased in the conditioned medium from RT112 cells treated with EGF, and this was partially inhibited with both 1 and 5 microM gefitinib. Conversely, TIMP2 decreased with EGF stimulation and this was reversed with gefitinib. Tissue inhibitor of metalloproteinase 1 had no effect on the growth of either cell line. These studies show alterations in the balance of MMPs and their inhibitors in EGF-stimulated bladder tumour cells, which are reversed by gefitinib, suggesting gefitinib should be investigated for its effect on human bladder tumours.

Effects of acute hyperglycaemia on anorectal motor and sensory function in diabetes mellitus.

Abstract: Aims To determine the effects of acute hyperglycaemia on anorectal motor and sensory function in patients with diabetes mellitus. Methods In eight patients with Type 1, and 10 patients with Type 2 diabetes anorectal motility and sensation were evaluated on separate days while the blood glucose concentration was stabilized at either 5 mmol/l or 12 mmol/l using a glucose clamp technique. Eight healthy subjects were studied under euglycaemic conditions. Anorectal motor and sensory function was evaluated using a sleeve/sidehole catheter, incorporating a barostat bag. Results In diabetic subjects hyperglycaemia was associated with reductions in maximal ( P < 0.05) and plateau ( P < 0.05) anal squeeze pressures and the rectal pressure/volume relationship (compliance) during barostat distension ( P < 0.01). Hyperglycaemia had no effect on the perception of rectal distension. Apart from a reduction in rectal compliance ( P < 0.01) and a trend ( P = 0.06) for an increased number of spontaneous anal sphincter relaxations, there were no differences between the patients studied during euglycaemia when compared with healthy subjects. Conclusions In patients with diabetes, acute hyperglycaemia inhibits external anal sphincter function and decreases rectal compliance, potentially increasing the risk of faecal incontinence.

Value of routine duodenal biopsy in diagnosing coeliac disease in patients with iron deficiency anaemia

Abstract: Background: Iron deficiency anaemia (IDA) is a recognised feature of coeliac disease in adults and can be its only presentation. Objective: To determine the yield of routine distal duodenal biopsies in diagnosing coeliac disease in adult and elderly patients with IDA whose endoscopy revealed no upper gastrointestinal cause of iron deficiency. Study design: Prospective study in a teaching hospital endoscopy unit. Method: Altogether 504 consecutive patients with IDA, aged 16–80 years, attending for endoscopy were included in this study. At least two distal duodenal biopsies were taken if endoscopy revealed no cause of iron deficiency. Result: In nine (1.8%) patients duodenal biopsies revealed typical histological features of coeliac disease. Of these, five patients were above 65 years old. Conclusion: In adult and elderly patients undergoing endoscopy for IDA, the endoscopist should take distal duodenal biopsies to exclude coeliac disease if no upper gastrointestinal cause of anaemia is found. Coeliac disease is not an uncommon cause of IDA in patients >65 years of age and a history of chronic diarrhoea increases diagnostic yield in this age group.

Social support for women with chronic pelvic pain: what is helpful from whom?

Abstract: Eight women with Chronic Pelvic Pain (CPP) were asked, by means of semi-structured interview, what had been helpful and unhelpful in terms of social support from their partners, families, friends, acquaintances, doctors, nurses and other women with CPP. Firstly, thematic analysis employing a pre-defined social support category system revealed that particular forms of tangible support were preferred from specific support providers but emotional and informational support was appreciated from the whole support network. Secondly, interpretative phenomenological analysis revealed three major additional themes: ‘Pain and Suffering’ described the trauma suffered by these patients and the anger and anxiety surrounding their experience; ‘Ideal Social Support’ revealed a picture of desired support consisting of enduring emotional and practical support which did not undermine individual autonomy; ‘Shortfalls in Social Support’ had subsidiary themes entitled ‘Lack of empathy’ and ‘Lack of engagement’. These themes we...

A prospective study of the predictive power of spiral computed tomographic angiography for defining renal vascular anatomy before live-donor nephrectomy.

Abstract: The advent of laparoscopic donor nephrectomy for renal transplantation has focused minds to an even greater degree on the vascular anatomy of the donor kidney. The authors from Leicester determined the accuracy of spiral CT imaging for donor venous anatomy and comparing it to the operative findings, either at open or laparoscopic donor nephrectomy. They found the technique to be an excellent way of assessing potential renal donors in terms of the gonadal and adrenal veins, but less so for predicting lumbar veins. OBJECTIVE To determine the accuracy of spiral computed tomography (CT) imaging of donor venous anatomy by comparing CT angiography (CTA) and operative findings, for both laparoscopic (LDN) and open donor nephrectomy. PATIENTS AND METHODS LDN presents unique surgical challenges, particularly with complex venous or arterial anatomy. The limitations of surgical access, poor visibility of the superior and posterior borders of the renal vein during LDN, and the variability of venous anatomy in this region, contribute to the difficulty of LDN, underlining the importance of imaging beforehand. Forty live donors (mean age 46 years, sd 11; 65% female) were assessed by CTA before donation. Scans were reported by the same radiologist. The number and diameter of ‘predicted’ renal arteries, veins and renal vein tributaries were documented. The donor kidney was removed by two consultant surgeons, and after back-table perfusion the same details were recorded and taken as the ‘reference’ findings. Tributaries of <1 mm diameter were not recorded. The right kidney was retrieved in seven patients; 25 of the 40 kidneys were retrieved by LDN and the other 15 by open surgery. RESULTS In all, 48 actual renal arteries were identified at nephrectomy; of these, 47 were predicted by CTA. Likewise, 41 actual renal veins were found at nephrectomy, 40 of which were predicted. The overall accuracy of spiral CTA in predicting the presence or absence of renal vein tributaries was 83% for gonadal and adrenal veins, and 75% for lumbar veins. There were seven false-negative lumbar veins found at nephrectomy; in these cases the CTA films were retrospectively examined, and five of these seven veins were identified. The predicted renal vein tributary diameter correlated poorly with the measured diameter at nephrectomy. CONCLUSIONS Assessing potential renal donors before surgery with spiral CTA provides an accurate prediction of the presence or absence of the gonadal and adrenal vein, but is less accurate for predicting lumbar veins. This is especially pertinent as the posterior lumbar tributaries have the most intra-individual variation, and are the most difficult to display and control at LDN. This highlights the need for meticulous dissection of the renal vein, particularly along its posterior wall.

Obtaining explicit consent for the use of archival tissue samples: practical issues

Abstract: Background:: Over the past few years, research ethics committees have increasingly demanded explicit consent before archival tissue samples can be used in research projects. Current UK guidance in this area requires an assessment of whether it is "practical" to obtain explicit consent. Ethics committees have little experience or evidence to help them to judge what is "practical" in this context. Methods:: We attempted to obtain general consent for research use of surplus tissue from renal transplant biopsies from the entire patient population of the renal transplant unit in Leicester. The nature of this patient population would be expected to facilitate this task. Results:: A total of 495 letters were sent. Attempts were made to contact non-responders when they attended the outpatient clinic. One year after the initiation of the project, the opinions of 26% of the patients had still not been ascertained. Conclusions:: The results confirm that the vast majority of patients are happy for "surplus" biopsy material to be used for research; the situation does not parallel the use of autopsy tissue. A requirement to obtain explicit consent for the study of archival tissue is likely, however, to block or at least seriously delay research, which is contrary to the public interest and specifically may harm the interests of the patients concerned. In the UK, the problem of tissue being used against the wishes of the donor has now been largely replaced by the problem of prohibition of tissue use against the wishes of the donor.