Time filter

Source Type

Olivieri F.,Marche Polytechnic University | Galeazzi R.,National Diagnostics | Giavarina D.,Clinical Chemistry and Hematology Laboratory | Testa R.,Center on Diabetes | And 8 more authors.
Mechanisms of Ageing and Development | Year: 2012

High sensitive cardiac Troponin T (hs-cTnT) represents an important tool in acute myocardial infarction (AMI) diagnosis. Even though the hs-cTnT evaluation is relevant for AMI diagnosis in elderly patients characterized by clinical and instrumental atypical presentation, the overall reliability in elderly patients is unknown. We aimed at: (1) defining the hs-cTnT 99th percentile value in an aged healthy reference population and (2) testing hs-cTnT diagnostic accuracy in elderly patients with a suspected AMI.294 healthy subjects (50-105 years old) and 299 elderly patients (75-96 years old) with suspected AMI at presentation, were enrolled. Conventional cTnT, hs-cTnT, NT-proBNP and creatinine levels were determined in all participants.Our main results are: (1) a significant hs-cTnT age-related increase was observed in an healthy reference population ranging 50-105 years old; (2) hs-cTnT levels showed an age-related multimodal distribution in the healthy reference population: 16. ng/L corresponds to the 99th percentile in subjects ranging 50-75 years old, whereas 70.6. ng/L corresponds to the 99th percentile in subjects ≥75 years old; (3) 86.8. ng/L resulted the hs-cTnT cut-off value with the highest efficiency in AMI diagnosis of geriatric patients.Our data suggest that the hs-cTnT cut-off value must be age-tailored to improve the AMI diagnostic accuracy. © 2012 Elsevier Ireland Ltd.


Buoro S.,Clinical Chemistry Laboratory | Appassiti Esposito S.,Clinical Chemistry Laboratory | Vavassori M.,Clinical Chemistry Laboratory | Mecca T.,Clinical Chemistry Laboratory | And 8 more authors.
Journal of Laboratory Automation | Year: 2016

Flow cytometry is widely used in many laboratories for automated nucleated cell counts and their differentiation in body fluids. The implementation of new reflex testing rules on these automated instruments could open new frontiers in laboratory workflow, improving characterization of body fluids and clinical diagnosis and decreasing costs. Ascitic (150) and pleural (33) fluids were collected and assessed by XE-5000 and optical microscopy. Cell counts performed with the methods showed a Pearson’s correlation of 0.98 (p < 0.0001), Passing–Bablok regression y = 0.99x + 2.44, and bias of 32.3. In ascitic fluids, the best diagnostic performance was found for polymorphonuclear and neutrophil counts on XE-5000, which exhibited areas under the curve (AUCs) 0.98 (p < 0.0001) and 0.99 (p < 0.0001), respectively. In pleural fluids the best diagnostic performance was found for polymorphonuclear percent parameter, which displayed 0.97 (p < 0.0001). Specific reflex test rules based on these parameters were characterized by 92% diagnostic concordance, 1.00 sensitivity, and 0.84 specificity with optical microscopy. The application of a set of reflex testing rules may improve the diagnostic performance of XE-5000, increasing its reliability for routine automated cell count in body fluids. We acknowledge that further studies should be planned to validate our findings according to clinical data. © 2015, 2015 Society for Laboratory Automation and Screening.


Castellani C.,Cystic Fibrosis Center | Picci L.,University of Padua | Tridello G.,Cystic Fibrosis Center | Casati E.,Cystic Fibrosis Center | And 4 more authors.
Genetics in Medicine | Year: 2016

Purpose:We evaluated the effects of cystic fibrosis (CF) carrier screening on birth prevalence trends and newborn screening (NBS) efficiency by comparing two Italian regions; carrier screening was performed in one region (eastern region (ER)) and not in the other (western region (WR)).Methods:Annual births of infants with CF, NBS false-positive results, NBS uncertain diagnoses (borderline sweat chloride (BSC)), carrier tests performed, and carriers detected were monitored during the 1993-2013 period.Measurements and main results:A total of 259 newborns with CF were detected. In the ER, 150 carrier couples were found. Mean annual percentage of birth prevalence decrease was 9% per 10,000 (P = 0.002) and was greater in the ER (15%, P = 0.0008; WR 1%, P = ns). The WR estimated birth prevalence was 1/3,589 in 1993 and 1/3,870 in 2013; in the ER it was 1/2,730 in 1993 and 1/14,200 in 2013. The ER birth prevalence correlated inversely with the number of carrier couples (P = 0.0032). The ratio between CF cases and NBS-positive results significantly decreased in the ER (1.6%, P = 0.0001) but not in the WR. The ratio between prevalence of BSC and of CF cases increased in the ER (P = 0.008) but not in the WR (P = 0.1).Conclusion:Carrier screening was connected with a decrease in birth prevalence of CF. Poorer NBS performance was observed in the carrier screening area. © American College of Medical Genetics and Genomics.


Castellani C.,Cystic Fibrosis Center | Tridello G.,Cystic Fibrosis Center | Tamanini A.,Clinical Chemistry and Hematology Laboratory | Assael B.M.,Cystic Fibrosis Center
Archives of Disease in Childhood | Year: 2016

Newborns with raised immunotrypsinogen levels who have non-pathological sweat chloride values and carry two cystic fibrosis transmembrane regulator (CFTR) mutations of which at least one is not acknowledged to be cystic fibrosis (CF)-causing are at risk of developing clinical manifestations consistent with CFTR-related disorders or even CF. It is not known whether newborns with similar genotypes and normal immunoreactive trypsinogen (IRT) may share the same risk. This study found that newborns with these characteristics and normal IRT have lower sweat chloride values than those with raised IRT (p = 0.007). © 2015 BMJ Publishing Group Ltd & Royal College of Paediatrics and Child Health.


PubMed | University of Padua, Cystic Fibrosis Center, Clinical Chemistry and Hematology Laboratory and ULSS 12 Veneziana Ospedale SS.Giovanni e Paolo Venezia
Type: Journal Article | Journal: Genetics in medicine : official journal of the American College of Medical Genetics | Year: 2016

We evaluated the effects of cystic fibrosis (CF) carrier screening on birth prevalence trends and newborn screening (NBS) efficiency by comparing two Italian regions; carrier screening was performed in one region (eastern region (ER)) and not in the other (western region (WR)).Annual births of infants with CF, NBS false-positive results, NBS uncertain diagnoses (borderline sweat chloride (BSC)), carrier tests performed, and carriers detected were monitored during the 1993-2013 period.A total of 259 newborns with CF were detected. In the ER, 150 carrier couples were found. Mean annual percentage of birth prevalence decrease was 9% per 10,000 (P = 0.002) and was greater in the ER (15%, P = 0.0008; WR 1%, P = ns). The WR estimated birth prevalence was 1/3,589 in 1993 and 1/3,870 in 2013; in the ER it was 1/2,730 in 1993 and 1/14,200 in 2013. The ER birth prevalence correlated inversely with the number of carrier couples (P = 0.0032). The ratio between CF cases and NBS-positive results significantly decreased in the ER (1.6%, P = 0.0001) but not in the WR. The ratio between prevalence of BSC and of CF cases increased in the ER (P = 0.008) but not in the WR (P = 0.1).Carrier screening was connected with a decrease in birth prevalence of CF. Poorer NBS performance was observed in the carrier screening area.


PubMed | Clinical Chemistry Laboratory, Pathology Laboratory, Microbiology Laboratory and Clinical Chemistry and Hematology Laboratory
Type: Journal Article | Journal: Journal of laboratory automation | Year: 2016

Flow cytometry is widely used in many laboratories for automated nucleated cell counts and their differentiation in body fluids. The implementation of new reflex testing rules on these automated instruments could open new frontiers in laboratory workflow, improving characterization of body fluids and clinical diagnosis and decreasing costs. Ascitic (150) and pleural (33) fluids were collected and assessed by XE-5000 and optical microscopy. Cell counts performed with the methods showed a Pearsons correlation of 0.98 (p < 0.0001), Passing-Bablok regression y = 0.99x + 2.44, and bias of 32.3. In ascitic fluids, the best diagnostic performance was found for polymorphonuclear and neutrophil counts on XE-5000, which exhibited areas under the curve (AUCs) 0.98 (p < 0.0001) and 0.99 (p < 0.0001), respectively. In pleural fluids the best diagnostic performance was found for polymorphonuclear percent parameter, which displayed 0.97 (p < 0.0001). Specific reflex test rules based on these parameters were characterized by 92% diagnostic concordance, 1.00 sensitivity, and 0.84 specificity with optical microscopy. The application of a set of reflex testing rules may improve the diagnostic performance of XE-5000, increasing its reliability for routine automated cell count in body fluids. We acknowledge that further studies should be planned to validate our findings according to clinical data.

Loading Clinical Chemistry and Hematology Laboratory collaborators
Loading Clinical Chemistry and Hematology Laboratory collaborators