Tandem hemodialysis and DFPP: Procedure, safety and cost-effectiveness in patients requiring chronic hemodialysis and lipid apheresis.

INTRODUCTION: Certain patients require simultaneous lipoprotein apheresis (LA) and intermittent hemodialysis (HD). Instead of undergoing 2 consecutive treatment sessions, a double filtration plasmapheresis (DFPP) and HD tandem procedure could be offered to reduce treatment times and costs. Our study evaluated the performance, safety and cost of this tandem procedure. MATERIAL AND METHODS: Three patients underwent 168 HD and DFPP tandem sessions in a tertiary center from August 2018 to November 2020, using a Fresenius 5008 generator for HD and an InfomedHF440 for DFPP. The system's efficacy was assessed by lipid subtraction performance for DFPP. Efficacy of 2 blood line connection configurations (parallel or sequential) was compared in terms of Kt/V and matched against an HD control session for each patient. Clinical and biological safety and the differential cost between tandem and consecutive procedures were evaluated. RESULTS: Throughout the tandem sessions, DFPP lasted 85 to 120 minutes, overlapping the 240-minute HD. Blood flow for HD and Kt/V were significantly lower during the tandem procedure with a parallel configuration compared to sequential or control paired HD. DFPP efficacy was comparable between all groups: over 60% reduction in cholesterol and over 50% for triglycerides. Symptomatic hypotension depended on the patients, not the procedure. The tandem procedure revealed an acceptable benefit-cost ratio. CONCLUSION: HD-DFPP tandem with a sequential blood line connecting system (derivation installed on the HD venous line) is effective and well-tolerated with a good cost-benefit ratio. Tandem reduces hospitalization and treatment session times and can be offered to patients requiring simultaneous HD and DFPP.

Protocol of comparison of the effects of single plasma exchange and double filtration plasmapheresis on peripheral lymphocyte phenotypes in patients with Chronic Inflammatory Demyelinating Polyradiculoneuropathy: a monocentric prospective study with single-case experimental design.

BACKGROUND: Chronic Inflammatory Demyelinating Polyradiculoneuropathy (CIDP), a rare disorder affecting young adults, causes gradual weakness of the limbs, areflexia and impaired sensory function. New CIDP phenotypes without pathogenic antibodies but with modified cell profiles have been described. Treatments include corticotherapy, intravenous immunoglobulins, and plasmapheresis but the latter's action mechanisms remain unclear. Plasmapheresis supposedly removes toxic agents like antibodies from plasma but it is uncertain whether it has an immune-modulating effect. Also, the refining mechanisms of the two main plasmapheresis techniques-single plasma exchange and double filtration plasmapheresis (DFPP) - are different and unclear. This study aims to compare the evolution of peripheral lymphocyte profiles in patients with CIDP according to their treatment (single centrifugation plasmapheresis or DFPP) to better grasp the action mechanisms of both techniques. METHOD: In this proof-of-concept, monocentric, prospective, Single-Case Experimental Design study, 5 patients are evaluated by alternating their treatment type (single plasma exchange or DFPP) for 6 courses of treatment after randomization to their first treatment type. Each course of treatment lasts 2-4 weeks. For single plasma exchange, 60 ml/kg plasma will be removed from the patient and replaced with albumin solutes, with a centrifugation method to avoid the immunological reaction caused by the membrane used with the filtration method. For DFPP, 60 ml/kg plasma will be removed from the patient with a plasma separator membrane, then processed via a fractionator membrane to remove molecules of a greater size than albumin before returning it to the patient. This technique requires no substitution solutes, only 20 g of albumin to replace what would normally be lost during a session. The primary outcome is the difference between the two plasmapheresis techniques in the variation of the TH1/TH17 ratio over the period D0H0-D0H3 and D0H0-D7. Secondary outcomes include the variation in lymphocyte subpopulations at each session and between therapeutic plasmapheresis techniques, the clinical evolution, tolerance and cost of treatments. DISCUSSION: Understanding the action mechanisms of single plasma exchange and DFPP will help us to offer the right treatment to each patient with CIPD according to efficacy, tolerance and cost. TRIAL REGISTRATION: ClinicalTrials.gov under the no. NCT04742374 and date of registration 10 December 2020.

Adalimumab and Infliximab in Crohn's disease - real life data from a national retrospective cohort study.

AIM: to compare the efficacy and safety of Adalimumab(ADA) and Infliximab(IFX), in a large Romanian population and to identify predictors of response. Methods We performed a national retrospective cohort study including 265 patients (136 ADA, 129 IFX) between 2008-2014. Binary logistic regression was performed with the statistical program Minitab. RESULTS: Patients were half women, with a median age of 36, a median disease duration of 2.5 years, 80% received Azathioprine. Mean therapy duration was 20 months in ADA group and 36 months in IFX group. Complete response to Adalimumab respectively Infliximab was recorded in 77%vs.65%, secondary loss of response in 18%vs.28%, statistically comparable. We failed to identify predictors of response. In 79.2%of patients with secondary loss of response to ADA, the dose was escalated, 12.5% were switched to Infliximab. In 70%of patients that lost response to IFX, the dose was increased, 30% were switched to Adalimumab. CONCLUSIONS: Adalimumab and Infliximab have similar efficacy, with a complete response rate of~70%. In case of secondary loss of response to IFX, the best solution is to switch to ADA, with 83% response rate, while in case of secondary loss of response to ADA, increasing the dose leads to 84 % response rate.

Contrast-enhanced ultrasound (CEUS) for the evaluation of focal liver lesions - a prospective multicenter study of its usefulness in clinical practice.

PURPOSE: To assess the value of contrast-enhanced ultrasound (CEUS) for differentiating malignant from benign focal liver lesions (FLLs) and for diagnosing different FLL types. MATERIAL AND METHODS: CEUS performed in 14 Romanian centers was prospectively collected between February 2011 and June 2012. The inclusion criteria were: age > 18 years; patients diagnosed with 1 - 3 de novo FLLs on B-mode ultrasound; reference method (computed tomography (CT), magnetic resonance imaging (MRI) or biopsy) available; patient's informed consent. FLL lesions were characterized during CEUS according to the European Federation of Societies for Ultrasound in Medicine and Biology guidelines. For statistical analysis, indeterminate FLLs at CEUS were rated as false classifications. RESULTS: A total number of 536 cases were included in the final analysis, 344 malignant lesions (64.2 %) and 192 benign lesions (35.8 %). The reference method was: CT/MRI - 379 cases (70.7 %), pathological exam - 150 cases (27.9 %) and aspiration of liver abscesses - 7 cases (1.4 %). CEUS was conclusive in 89.3 % and inconclusive in 10.7 % of cases. To differentiate between malignant and benign FLLs, CEUS had 85.7 % sensitivity, 85.9 % specificity, 91.6 % positive predictive value, 77.1 % negative predictive value and 85.8 % accuracy. The CEUS accuracy for differentiation between malignant and benign liver lesions was similar in tumors with diameter ≤ 2 cm and those with diameter > 2 cm. CONCLUSION: CEUS represents a useful method in clinical practice for differentiating between malignant and benign FLLs detected on standard ultrasonography, and the results of this study are in concordance with previous multicenter studies: DEGUM (Germany) and STIC (France).

Technical performance of colonoscopy -- multicenter study in university and non-university centers of Romania.

UNLABELLED: The aim of the paper was to evaluate the national availability of colonoscopy and the quality parameters of this procedure in our country. MATERIAL AND METHOD: During a 6 months period (01.07- 31.12.2009), we performed a prospective multicenter study in which 76 centers were invited to respond to a questionnaire regarding colonoscopy, 39 centers agreeing to participate. We assessed: the number of colonoscopies, the number of total colonoscopies and the causes of incomplete colonoscopies. RESULTS: During the study period, 16,083 colonoscopies were performed, 12,294 (76.4%) of them total colonoscopies. In 1,191 cases, stenosis was the cause of incomplete colonoscopy. If we consider this an objective reason for an incomplete colonoscopy, there were 12,294 total colonoscopies (82.4%). Comparing university centers with non-university ones, the proportion of total colonoscopies was 10,400/12,475 (83.4%) vs. 1,894/2,417 (78.4%) (p less then 0.0001). However, comparing the present study with previous ones, performed in 2003 and 2007, the proportion of total colonoscopies increased from 70.5% to 76.9% and 82.4% respectively (2003 vs. 2007 p less then 0.0001; 2007 vs. 2009 p less then 0.0001), while the quality difference between university and non-university hospitals persisted. CONCLUSIONS: the quality of colonoscopy in Romania increased in the last 5 years, while the quality difference between university and non-university hospitals persisted.

[Portal hypertension in liver cirrhosis]. / Actualitati în hipertensiunea portala din ciroza hepatica.

Portal hypertension is a dramatic complication in liver cirrhosis by efraction of the varices localized more frequently in the esophagus. It has been an actual subject due to physiopathological research (endotelin system, nitric system etc), diagnosis (echoendoscopy, color Doppler), and therapeutically progress. Propranolol, available at a low cost, is efficient and unanimously accepted in the prophylactic treatment of medium and large varices which have never bled as well as in the hemorrhage due to variceal efraction which stopped therapeutically or spontaneously. This drug diminishes the risk of rebleeding. Besides the pharmacological treatment, terlipresine, octreotid, sclerotherapy and bandlegation are used in active hemorrhage due to variceal efraction. If this fails other methods for haemostasis are used: portosystemic transjugular shunt, mechanical tamponade, selective surgery and ideally hepatic transplant. Except for the hepatic transplant, none of the mentioned methods can improve the rate of survival in-patients, which depends on the state of the hepatic failure.

[Spontaneous bacterial peritonitis- undervalued complication in liver cirrhosis]. / Peritonita bacteriana spontana--complicatie subevaluata în ciroza hepatica.

This complication described rather late and theoretically and practically under-evaluated occurs in long term evolution of ascitic hepatic cirrhosis. The positive diagnosis is indicated by the following elements: more than 250 polymorphonuclear count in ascitic fluid, under 1 g/dl protein concentration ascitic fluid, a positive culture for a unique bacterium. Treatment of SBP is made with third generation cephalosporins with immediate favorable evolution. Antibiotic prophylaxis appears to be effective in the prevention of the first SBP episode and long term norfloxacin administration appeared to be very effective in the prevention of the recurrence. The survivors of SBP episode should be recommended for a potential liver transplant.

[The examination of the digestive tract in patients with iron-deficiency anemia]. / Evaluarea necesitatii examinarii tractului digestiv la pacientii cu anemie feripriva.

According to literature the gastroenterologic consultations for iron-deficiency anemia are quite frequent. The aim was the evaluation of the part played by gastrointestinal examinations for the diagnosis of iron-deficiency anemia. There were 115 patients admitted in the Medical Clinic between 1998-1999, with iron-deficiency anemia in the absence of macroscopic bleeding who carried out upper or lower endoscopy. A digestive lesion which account for iron deficiency anemia was identified in 35% of the cases. In the upper digestive tract there were 60%, in decreasing order of frequency: peptic ulcer, gastric cancer, erosive gastritis, angiodysplasia. In the lower digestive tract were 35% of the cases (colorectal cancer, polyps, angiodysplasia and hemorrhoids). In 5% of the cases there were found synchronization of the digestive tract lesions. So the digestive tract examination is worth doing because it establishes the diagnosis in 35% of the cases with few symptoms. The digestive tract lesions are more frequent in the upper tract, but they are more severe in the lower digestive tract. The possibility of the synchronization of lesions proves the necessity of carrying out the complete examination of the whole digestive tract.

[The effect of light intensity and neostigmine on the electroretinogram of Drosophila melanogaster]. / Influenta intensitatii luminoase si a neostigminei asupra electroretinogramei la Drosophila melanogaster.

In this article is presented the influence upon the electroretinogram, of some external factors acting at different levels of the visual system in the fruit fly, Drosophila melanogaster. The experiments revealed the effects generated by the light intensity modification as well as by the injection of a neuropharmaceutic--the neostigmine. The increase of the light stimuli intensity induced the same change of the rate between the amplitudes of the main electroretinographic components as the neostigmine does. It was used the "flickering" excitation regime, utilizing a data acquisition system adapted to the principal experimental device.