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Biomedical subjects

N Venturoli

Publications and source records attributed to N Venturoli.

11 recordsLinked to original sources
PubMed2004

Increased prevalence of fatty liver in arterial hypertensive patients with normal liver enzymes: role of insulin resistance.

BACKGROUND: The conditions associated with fatty liver disease presenting with normal liver enzymes and the mechanism involved in its development remain to be fully elucidated. AIMS: The aim of the present study was to test the hypothesis that fatty liver with normal liver enzymes occurs more frequently in arterial hypertensive patients and to establish whether this condition is associated with insulin resistance. PATIENTS: A total of 55 non-obese, non-diabetic, non-heavy alcohol drinking patients with arterial hypertensive and normal liver enzymes and 55 sex and age matched healthy subjects were enrolled into the study. METHODS: Plasma metabolic parameters, body mass index, and the presence of fatty liver were investigated. Insulin resistance was estimated from plasma insulin and glucose as the homeostasis model assessment index. Stepwise logistic regression and multivariate regression analysis were used on the combined sample to identify variables independently associated with fatty liver and insulin resistance. RESULTS: Hypertensive patients had a significantly higher prevalence of fatty liver (30.9% v 12.7%; p<0.041), higher insulin resistance (mean 2.27 (SD 1.81) v 1.56 (0.70); p = 0.022), and slightly higher body mass index (24.9 (3.0) v 24.0 (2.2); p = 0.043) than controls. Multivariate logistic regression identified insulin resistance (odds ratio 1.66 (95% confidence interval (CI) 1.03-2.52)) and body mass index (OR 1.22 (95% CI 1.00-1.49)) as factors independently associated with fatty liver. Multivariate regression analysis showed insulin resistance to be predicted by alanine transaminase (p = 0.002), presence of arterial hypertension (p = 0.029), and body mass index (p = 0.048). CONCLUSION: The higher prevalence of non-alcoholic fatty liver in non-obese hypertensive patients with normal liver enzymes appears to be related to increases in insulin resistance and body weight.

Adult↗
PubMed2001

Hospital attitude survey on organ donation in the Emilia-Romagna region, Italy.

UNLABELLED: The role of hospital staff in the organ procurement process is crucial. Nevertheless, there is little literature about their attitudes toward donation. The Donor Action Hospital Attitude Survey (HAS) comprises a series of questions to assess hospital staff's attitudes, beliefs, and knowledge on organ donation and transplantation. Further analysis of the data will help identify any weak areas in the staff viewpoint and information, highlight potential needs for more education on specific issues, and establish a baseline to monitor future improvements. We used the Donor Action HAS in the Emilia-Romagna region, Italy. The aim of this paper is to assess and better understand the personnel's viewpoint in the 12 main hospitals of the region. The survey was carried out among hospital staff involved in organ donation. 1576 responses were collected (52 % of distributed questionnaires), of which 1024 came from nurses, 475 from physicians, and 77 from other backgrounds. Questions were subdivided into categories, and for every point an overall mark (maximum 3/3) was calculated. RESULTS: 1. Involvement in donation process during the past year: 1.24 /3, 2. Attitudes to organ donation (OD): 2.51 /3, 3. Skills / Self-confidence in donation practices: 1.36 /3, 4. Satisfaction with local transplant coordinator (TC) services: 2.31 /3. The attitude towards organ donation was positive, 1386 respondents support organ donation. A high percentage (93.6 % of respondents) is of the opinion that transplantation helps save other people's lives. Most uncertainty arises on the question whether donation helps families with grief. It is remarkable that only 53 % of those prepared to donate organs have informed the family of their wish. Many respondents do not feel comfortable performing key tasks close to donation. Major difficulties were observed in explaining to a family the concept of brain death (0.98 /3). Knowledge on the concept of brain-death was one of the most requested subjects for improvement. Emilia-Romagna is the region with one of the highest donation rates in Italy (29.9 pmp in 2000). Nevertheless, more profound knowledge of the local situation could help further improve donation.

Adult↗
PubMed2000

Organ donation and transplantation as health programs in Italy.

Organ and tissue donation and transplantation have a role in public health programs as organizational projects designed by public health departments to increase the quality and number of donations and transplantations. These programs serve as communication projects to inform public opinion on cerebral death, organ and tissue shortages, procurement and allocation rules, and the quality of life of transplanted patients. The health department of Emilia-Romagna created a regional law and a multimedia communication program for these purposes, resulting in a 95% increase of cadaver donor in 4 years. In 1995, regional activity reached the European mean level and afterwards surpassed it. In 1997, the bone bank was activated, followed in 1998 by the heart valve and vascular segment bank. The regional health department now considers transplant activities a primary goal; human and professional relations between intensive care units and the transplant reference center are considered crucial; cooperation among health departments, medical teams involved in organ procurement and transplant activities has been fostered, and the local coordination network has been active and efficient. The public information campaign has proven important in providing information both to professionals and citizens.

Health Care Rationing↗
PubMed2000

Reliability of ultrasound screening of liver and kidney donors: a retrospective study.

The reliability of abdominal ultrasound in screening liver and kidney donors was assessed by correlating ultrasound findings with the suitability of organs for transplantation as determined by direct examination of the organs. We evaluated 100 multiorgan donors (100 livers, 200 kidneys) during a 15-month period. Abdominal ultrasound showed the following results for liver and kidney, respectively: specificity, 95.6% and 98.9%; sensitivity, 62.5% and 66.6%; and accuracy, 93% and 97%. These results show that abdominal ultrasound is a valuable tool for determining suitability of organs for transplantation when the ultrasound findings are normal. When ultrasound findings are abnormal, further studies are necessary to determine the suitability of the organs for transplantation.

Adolescent↗
PubMed2000

[The transplant coordinator].

Spain was the first European country adopting a strategy of organ procurement based on a specific health professional named transplant coordinator, who was first established in Catalunya in the middle eighties. In principle, the transplant coordinator is a doctor with hospital experience who is involved full time in organ procurement. The transplant coordination activity is available without interruption, due to a team work. Transplant coordination is based on four main functions: clinical, research, training and communication, management. The principles of transplant coordination according to the Spanish model are reported in the recently approved Italian law on transplantation (law 91/1999), indicating the coordinator's specific functions: a) communication to the regional reference centre of the data concerning the possible organ donors, b) preparation of the documents needed, c) relationship with the donors' family, d) information and education of the population on transplantation issues.

Humans↗
PubMed1999

A comparison of pediatric and adult kidney donors for adult recipients.

The high demand for organs for transplantation has made it necessary to consider using even the oldest and youngest of potential donors in order to increase the organ supply. In this retrospective study, the outcome of kidney transplantation using cadaveric pediatric donors was compared with that of an adult control series. Graft procurement took place in two regions of Italy (Emilia-Romagna and Piemonte) over an 11-year period. A group of pediatric donors (< 15 years old, n = 30) was compared with an adult donor group (n = 67). All recipients were adults who received cyclosporin as immunosuppression. Actuarial patient and graft survival rates did not differ significantly between the two groups (patient survival 96% and 96% for pediatric donors versus 98% and 92% for adult donors at 1 and 5 years post-transplantation; graft survival 76% and 68% for pediatric donors versus 88% and 74% for adult donors 1 and 5 y post-transplantation). Complications were also evaluated, but no difference was found (the only exception being the creatinine level in the 5th year). Renal transplantation with cadaveric donors starting at 4 years of age gave results comparable to kidneys coming from adults. These data show that cadaveric pediatric donor kidneys may be used in adult recipients with good results. The ethical implications of the subject are extensively reviewed.

Adolescent↗
PubMed1997

What is the criterion for differentiating chronic hepatitis from compensated cirrhosis? A prospective study comparing ultrasonography and percutaneous liver biopsy.

BACKGROUND/AIMS/METHODS: The diagnosis of cirrhosis is currently based on percutaneous liver biopsy, although this procedure may give rise to false negative results. This prospective study blindly investigates the accuracy of an ultrasonographic score, derived from liver, spleen and portal vein features, in predicting the final diagnosis in 212 patients with compensated chronic liver disease undergoing percutaneous liver biopsy. RESULTS: Taking biopsy as the standard, the ultrasonographic score differed significantly between chronic hepatitis (39+/-33) and cirrhosis (100+/-35) (p<0.0001). Discriminant analysis with stepwise forward selection of the variables identified liver surface nodularity and portal flow velocity as independently associated with the diagnosis of cirrhosis (p<0.005), and a score based on these two variables correctly identified cirrhosis in 82.2% of cases. One or both of these abnormalities were also found in 27/32 patients who were diagnosed as having cirrhosis at ultrasound, but were not cirrhotic histologically. Eight of these 32 cases developed signs of decompensated liver disease and/or portal hypertension in the subsequent 6-month follow-up, thus supporting the diagnosis of cirrhosis. CONCLUSIONS: Our data suggest that ultrasound is accurate in predicting the final diagnosis in patients with compensated chronic liver disease and may identify cirrhosis even in the absence of a typical histopathological pattern. However, neither percutaneous liver biopsy nor ultrasonography can be assumed to be the definitive criterion for the diagnosis of compensated cirrhosis.

Adolescent↗
PubMed1995

Sonographic assessment of the distal end of the thoracic duct in healthy volunteers and in patients with portal hypertension.

OBJECTIVE: Our study assessed the feasibility of detecting and measuring by sonography the diameter of the thoracic duct in healthy subjects and in patients with cirrhosis and portal hypertension. We also evaluated the relationship of thoracic duct size with age and with clinical, endoscopic, and sonographic signs of portal hypertension. SUBJECTS AND METHODS: The left supraclavicular area of 24 patients with cirrhosis and 23 healthy subjects was examined with high-frequency probes using transverse and oblique scans to visualize the distal end of the thoracic duct. All patients with cirrhosis, diagnosed by liver biopsy or clinical and biochemical data, had endoscopic or sonographic signs of portal hypertension. The severity of the liver disease was determined by Child-Pugh's criteria; the diameter of portal vessels and the size of esophageal varices were also considered. RESULTS: The thoracic duct was visualized in 19 of 24 patients with cirrhosis and in 18 of 23 control subjects (percent of visualization was 79% and 78%, respectively). The diameter of the duct was larger in patients with cirrhosis than in healthy subjects (3.1 +/- 1.2 mm versus 1.9 +/- 0.5 mm; p < .0001), but no relationship was found among clinical, endoscopic, and sonographic signs of portal hypertension. A direct relationship between age and the size of the thoracic duct was found only among healthy subjects. CONCLUSION: This is the first report of the sonographic visualization of the distal end of the thoracic duct. Its diameter is small in healthy young subjects, whereas in patients with cirrhosis its increased diameter seems to be associated only with the presence of portal hypertension and not with its severity.

Humans↗
PubMedDate not supplied

[Pulmonary complications from monoclonal antibody (OKT3) immunosuppression in patients who have undergone an orthotopic liver transplant].

The authors investigated the incidence of pulmonary complications following immunosuppression with monoclonal antibodies (OKT3) in a series of 100 consecutive cases of orthotopic liver transplantation (OLT). Of 17 patients treated with OKT3 (16 for acute rejection and 1 for cyclosporine toxicity), 11 pulmonary infections were observed (65%), 9 of which (53%) with onset within a mean of 9 days after OKT3 administration. The infections were severe in all cases and lethal in 8 cases: the most common pathogens were Candida (4 cases) and Pseudomonas aeruginosa (3 cases). On the contrary, of 39 cases of rejection treated with steroids, infections were observed in 3 cases only (8%). The 53% incidence of pulmonary infections in OKT3 patients, significantly higher than in the extant patients (19%), confirms OKT3 treatment as a strong risk factor for severe pulmonary infections. Furthermore, the occurrence of pulmonary edema was directly related to OKT3 administration in 7 OKT3 patients (41%), whereas only 20 cases (24%) occurred in the extant OLT patients (p < 0.001). OKT3-related pulmonary edema was always observed in hyperhydrated patients at the time of drug administration and it seemed to be related to the vasoactive myocardiotoxic agents released by damaged T-cells.

Acute Disease↗