Search Results

You are looking at 1 - 5 of 5 items for

  • Author: Bianca Grigorescu x
Clear All Modify Search
Open access

Bianca-Liana Grigorescu, Raluca Ştefania Fodor, Adrian Dan Cioc, Mihaly Veres, Monica Orlandea, Bogdan Lăzescu and Emoke Almasy

Abstract

Clostridium difficile, an anaerobic, spore-forming, toxin-forming, gram-positive bacillus present in the bacterial flora of the colon is the principal cause of nosocomial diarrhoea in adults.

Aim: Assessment of favouring factors of Clostridium difficile infections as well as the interactions between them, in critically ill hospitalized patients undergoing complex medical and surgical treatments.

Material and Methods: A retrospective case-control study involving eighty patients admitted in the Intensive Care Unit (ICU) of the County Clinical Emergency Hospital Tîrgu-Mureş was conducted between January and October 2014. Patients aged eighteen years and over, who had undergone complex medical and surgical treatment, were divided into two subgroups. Group 1 included patients who developed diarrhoea but were not diagnosed as having a Clostridium difficile infection (CDI). Group 2 included patients who developed diarrhoea due to CDI as indicated by a positive culture and the expression of exotoxin. The assessed parameters were age, length of stay (LOS), antibiotic spectrum, association with proton pump inhibitors (PPI) or H2-receptor antagonists, immunological status, the presence or lack of gastrointestinal tract surgery.

Results: The mean age was 64.6 years with an average LOS of 10 days. Fifty-six percent of patients came to the ICU from internal medicine wards and forty-three percent from surgical wards. 20.5% of them were immunosuppressed. Co-association of ceftriaxone and pantoprazole significantly increased the risk of CDI compared to co-administration of any other antibiotic or pantoprazole (p=0.01). The odds ratio for Pantoprazole together with any antibiotic versus antibiotic therapy alone was significantly higher (p=0.018) with a sevenfold increase in the risk of positive exotoxin increase.

Conclusions: Antibiotic use is associated with “no risk to develop CDI” in the first five days of administration. PPIs associated therapy increased the risk of CDI in first seventy-two hours regardless of the antibiotic type, and contributes to an active expression of CD exotoxin.

Open access

Anca Meda Georgescu, Bianca Liana Grigorescu, Ioana Raluca Chirteș, Alexander A. Vitin and Raluca Ștefania Fodor

Abstract

Sepsis is an injurious systemic host response to infection, which can often lead to septic shock and death. Recently, the immune-pathogenesis and genomics of sepsis have become a research topic focusing on the establishment of diagnostic and prognostic biomarkers. As yet, none have been identified as having the necessary specificity to be used independently of other factors in this respect. However the accumulation of current evidence regarding genetic variations, especially the single nucleotide polymorphisms (SNPs) of cytokines and other innate immunity determinants, partially explains the susceptibility and individual differences of patients with regard to the evolution of sepsis. This article outlines the role of genetic variation of some serum proteins which have the potential to be used as biomarker values in evaluating sepsis susceptibility and the progression of the condition.

Open access

Grigorescu Bianca, Fodor Raluca, Mihaly Veres, Monica Orlandea, Judita Badea, Katalin Hlavathy and Adrian Cioc

Abstract

Introduction: NGAL (Neutrophil Gelatinase Associated Lipocalin) is a biomarker recently introduced into clinical practice for the early diagnosis of acute kidney injury (AKI). The aim of this study was to correlate the plasmatic NGAL value determined at admission with clinical progression and severity of AKI in critically ill patients.

Material and method: Thirty two consecutive critically ill adult patients at risk of developing AKI (trauma, sepsis), admitted in Intensive Care Unit of the Clinical County Emergency Hospital Mures, between January to March 2015 were enrolled in the study. For each patient included in the study plasma NGAL levels were determined on admission, and these were correlated with the degree of AKI development (according to AKIN criteria) at 48 hours and 5 days post admission. The discriminatory power of NGAL, creatinine, creatinine clearance and corrected creatinine (depending on water balance) were determined using the ROC (receiver-operating characteristic) and likelihood ratios.

Results: ROC curve analysis showed a better discriminatory capacity in terms of early diagnosis of AKI for NGAL (AUC=0.81 for NGAL, AUC=0.59 for creatinine, AUC=0.62 for corrected creatinine, AUC=0.29 for creatinine clearance). The value of likelihood ratio was also significantly higher for NGAL (3.01±2.73 for NGAL, 1.27±1.14 for creatinine, 1.78±1.81 for corrected creatinine, and 0.48±0.33 for creatinine clearance).

Conclusions: NGAL biomarker has a better discrimination capacity for early prediction of acute kidney injury compared to previously used markers.

Open access

Grigorescu Bianca-Liana, Fodor Raluca Ştefania, Scridon Alina, Perian Marcel, Badea Iudita, Cioc Adrian Dan, Cotoi Ovidiu Simion, Copotoiu Sanda-Maria and Azamfirei Leonard

Abstract

Objective: The assessment of systemic reperfusion injury and the contractile force of the peripheral muscles post-acute ischemia of the hind limbs in healthy versus diabetic ischemic preconditioned rats.

Method: The study included 16 Wistar rats divided into two groups: the control group and the diabetic ischemic preconditioned group. Acute ischemia was induced, followed by reperfusion. The assessment of reperfusion injury used biochemical, histopathological and functional determinations (peak tetanic tension-PTT, specific tension-ST).

Results: Ischemia-reperfusion injury was more severe in control group regarding creatine-kinase (CK) (CK1=470.13 IU/L versus CK2=230.88 IU/L, p=0.0001) and myoglobin (390.25 ng/mL versus 47.99 ng/mL, p=0.025). Cytolysis enzymes were significantly increased in diabetic preconditioned rats (Alanine aminotransferase ALAT1=46 IU/L, ALAT2=167.8 IU/L, p=0.02; Aspartate aminotransferase ASAT1=106 IU/L, ASAT2=237.5 IU/L, p=0.016). Functional assessment (PTT and ST) highlighted roughly equal values. A paradoxical response occurred in diabetic rats (the contractile force increased during the period of the stimulation). Histopathological findings showed that rhabdomyolysis was more severe in the control group, while inflammatory systemic response due to reperfusion injury was less expressed in diabetic ischemic preconditioned rats.

Conclusions: Ischemic preconditioning reduces the severity of reperfusion injury and allows the preservation of contractile muscle function in diabetic rats.

Open access

Ioan Țilea, Daniela Saveta Popa, Timea Szakács Xantus, Daniela Primejdie, Bianca Grigorescu, Brîndușa Țilea, Andreea Elena Bocicor and Andreea Varga

Abstract

A high-throughput liquid chromatography method with detection by tandem mass spectrometry (LC-MS/MS) was developed and validated for the quantification of apixaban in human plasma. The separation was performed on a Gemini-NX column under isocratic conditions using a 33:67 (v/v) mixture of acetonitrile and 1 mM ammonium formate in water at 40 ºC with a flow rate of 0.5 mL/min. The detection of apixaban was performed in multiple reaction monitoring mode (m/z 417.2 from m/z 460.2) with electrospray positive ionization. A single-step protein precipitation with methanol was used for plasma sample preparation. The method was validated with respect to selectivity, linearity (r > 0.994), intra-day and inter-day precision (CV < 14.4 %) and accuracy (bias < 9.5 %) over the range of 9.70 - 970.00 ng/mL plasma. The lower limit of quantification (LLOQ) was 9.70 ng/mL and the recovery was between 97.4 - 104.5 %. The method is fast, efficient, requires the processing of a small volume of plasma (50 μL), a short run-time (1 min) for chromatographic analysis, and a simple and rapid preparation of samples. It is very well suited for clinical therapeutic drug monitoring and pharmacokinetic studies.