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Hypertension and nephrology

FEBRUARY 20, 2018

[Therapy of pathological phosphate metabolism in chronic kidney disease]

LADÁNYI Erzsébet, DEÁK György, TISLÉR András, SZABÓ András

[The Kidney Disease Improving Global Outcomes (KDIGO) clinical practice guideline update for Chronic Kidney Disease Mineral and Bone Disorder (CKD-MBD) was published in the summer of 2017 and has become a very important guidance of the complex therapy of patients with CKD. It is well known that, besides infections, cardiovascular diseases in close causal relationship with CKD-MBD are leading mortality factors of patients with CKD. Therefore the publication of the new international guideline is especially important. A Nationwide Professional Advisory Board summoned upon the initiative of the Hungarian team of Sanofi-Aventis had its assembly in September 2017 focusing on the current approaches of the therapy of calcium-phosphate metabolism in CKD patients in Hungary. Board members compared the differences between the 2009 and 2017 KDIGO guidelines and reviewed the 2011 Hungarian CKD-MBD recommendation and the relevant financing protocol. Board members assessed the applicability of the new guideline to current Hungarian practice. As compared to the previous 2009 guideline, although a number of issues were revised and modified in the light of new research and clinical results in the new 2017 guideline, most of the recommendations are still applicable tooure very day practice. It is a fundamental requirement to keep to the new guideline including the modified recommendations to optimize the long term life expectancy and quality of life of patients with CKD. The purpose of this article is to compare the 2009 and 2017 KDIGO guidelines in terms of calcium-phosphate metabolism and the treatment of hyperphosphataemia focusing on the new or modified guideline recommendations in order to assess the feasibility of their implementation in Hungarian practice. Based on available evidence and the new KDIGO guideline, board member sout lined the direction of changes of the Hungarian CKD-MBD protocol and the prescription rules of the related medications.]

Clinical Neuroscience

MARCH 30, 2017

Electrophysiological alterations and general toxic signs obtained by subacute administration of titanium dioxide nanoparticles to the airways of rats

HORVÁTH Tamara, PAPP András, KOVÁCS Dávid, KÁLOMISTA Ildikó, KOZMA Gábor, VEZÉR Tünde

Introduction and aims - Particles of titanium dioxide (TiO2) with typical size below 100 nm have gained a broad range of application by now, partly involving direct human exposure. Their known properties - high specific surface, mobility within the organism, induction of oxidative stress, release of inflammation mediators etc. - raise the possibility of nervous system damage but the available data regarding this are scarce and contradictory. Based on that, and the experiences with other metal oxide nanoparticles, the aim of the present study was to investigate certain general end nervous system toxic effects of TiO2 nanoparticles applied in the airways of rats. Materials and methods - Young adult Wistar rats (5 groups of 10 rats each) received, daily for 28 days, intratracheal instillations of titanium dioxide nanoparticles of ca. 10 nm diameter, suspended in 1% hydroxyethyl cellulose dissolved in phosphate-buffered saline, in the doses of 1, 3, and 10 mg/kg b. w. Vehicle controls received the suspension medium and there was also an untreated control group. During treatment, the rats’ body weight was measured, and their clinical state observed, daily. After the 28 days, spontaneous cortical activity, sensory evoked potentials and tail nerve action potential was recorded in urethane anesthesia, then the rats were dissected and tissue samples were taken for Ti level determination and biochemical measurements of some oxidative stress indicators. Results - The two higher doses reduced the rate of body weight gain significantly. Sensory evoked potentials and tail nerve action potential were significantly slowed, but the change in the spectrum of spontaneous cortical activity was not significant. Correlation of moderate strength was found between certain evoked potential parameters and brain Ti level and oxidative stress data. Conclusion - Our results underlined the possible neurotoxicity of TiO2 NPs but also the need for further investigations.

Clinical Neuroscience

JULY 30, 2015

[Treatment of post spondylodesis adjacent segment disease with minimally invasive, anterolateral surgery on lumbar spine: there is no need for dorsal operation?]

SCHWARCZ Attila, SZAKÁLY Péter, BÜKI András, DÓCZI Tamás

[Adjacent segment disease (ASD) occurs with a probability of 30% in the lumbar spine following spinal fusion surgery. Usually advanced degenerative changes happen cranially to the fused lumbar segment. Thus, secondary spinal instability, stenosis, spodylolisthesis, foraminal stenosis can lead to the recurrence of the pain not always amenable to conservative measures. A typical surgical solution to treat ASD consists of posterior revision surgery including decompression, change or extension of the instrumentation and fusion to the rostral level. It results in a larger operation with considerable risk of complications. We present a typical case of ASD treated surgically with a new minimally invasive way not yet performed in Hungary. We use anterolateral abdominal muscle splitting approach to reach the lumbar spine through the retroperitoneum. A discectomy is performed by retracting the psoas muscle dorsally. The intervertebral bony fusion is achieved by implanting a cage with large volume that is stuffed with autologous bone or tricalcium phosphate. A cage with large volume results in excellent annulus fibrosus tension, immediate stability and provides large surface for bony fusion. A stand-alone cage construct can be supplemented with lateral screw/rod/plate fixation. The advantage of the new technique for the treatment of ASD includes minimal blood loss, short operation time, significantly less postoperative pain and much less complication rate.]

LAM Extra for General Practicioners

FEBRUARY 18, 2014

[SECONDARY OSTEOPOROSIS IN GASTROINTESTINAL DISEASES]

FUSZEK Péter

[Gastrointestinal disease is often overlooked or simply forgotten as a cause of osteoporosis. In a number of gastrointestinal diseases, sometimes because of the medicines used for their treatment, malabsorption syndrome may occur. Malabsorption might lead to insufficient absorption of calcium, phosphate, magnesium, vitamin D, vitamin K and proteins, which can cause osteopenia, osteoporosis and osteomalacia. In this paper, we aim to review the gastroenterological diseases that can lead to osteoporosis and treatment strategies.]

Hypertension and nephrology

MARCH 22, 2013

[Paradigmal changes in renal replacement therapy. Dialysis and drug therapy of quality in chronic renal patients - Optimal and adequate opportunities of dialysis therapy]

KISS István, SZEGEDI János, FODOR Erzsébet, BARABÁS Noémi, REMPORT Ádám, AMBRUS Csaba, KULCSÁR Imre

[Researches over the past thirty years, many results have been related to acute and chronic renal failure pathophysiology, clinical characteristics and therapy. Can be more than just the uremic toxins and their characteristics of the regulation of salt and water balance, renal anemia treatment, uremic metabolic disorders, calcium phosphate and lipid metabolism dysfunction. Improve the quality of treatment and reduce mortality and options can be influenced by factors come to, therefore, execution and technique of dialysis therapy. We know the primary concern of the treatment period for reducing mortality. This is best for intermittent treatments increased (4.5-6 hours) treatment will help. Narrow scope is optional for the treatment several times a week treatment, the daily 8-hour long nightly therapy. The mortality of the patient significantly influenced by age, gender, co-morbidities, fluid balance and the CaxPO4. The technical side is the key factor influencing the dialysis fluid purity and membrane properties. The use of high-flux membranes is clearly improving the quality of treatment, the additional benefit of hemodiafiltration therapy, the mortality for those still controversial. For optimal dialysis adequacy, complexity may result in reducing mortality and improving the quality of life in chronic dialysis patients.]

Hypertension and nephrology

DECEMBER 08, 2012

[Terciary hyperparathyreosis or not? ? You cannot solve it alone: combined treatment in severe osteitis fibrosa cystica]

HERSZÉNYI Eszter, PATÓ Éva, SZALAY László, BÍRÓ Zsolt, György Andrea, DEÁK György

[Phosphate retention, consequential rise of the phosphaturic fibroblast growth factor-23 that decreases the level of calcitriol resulting in hypocalcemia facilitates the development of secondary hyperparathyroidism (sHPT) in chronic kidney disease (CKD). Hyperphosphatemia, hypocalcemia and low calcitriol level result in increasing secretion of parathormone (PTH). While sHPT occures frequently in CKD, the development of therapy-resistant and hypercalcemic tertiary hyperparathyroidism is rare due to current therapeutic approaches. We present the case of a 41 year old, treated schizophrenic, hemodialized male patient with severe osteitis fibrosa cystica, severe hyperparathyroidism (PTH 2500 pg/ml) - considered to be tertiary - and with repeated pathologic fractures. While hospitalized, the patient was under supervised, combined therapy with the vitamin D receptor activator paricalcitol and the calcimimetic cinacalcet that resulted in marked decrease of PTH level to 1589 pg/ml. However, after discharge from the hospital due to the lack of compliance he failed to take his medications and PTH had risen to the initial level. This case demonstrates that severe hyperparathyroidism thought to be therapy resistant responds well to a combination of paricalcitol and cinacalcet however, patient compliance is essential to therapeutic success.]

Clinical Neuroscience

NOVEMBER 20, 2012

[Clinical significance of the cardiovascular effects of fingolimod treatment in multiple sclerosis]

SZÉPLAKI Gábor, MERKELY Béla

[Fingolimod is a sphingosine-1 phosphate receptor modulator, which is effective in the treatment of severe relapsingremitting form of multiple sclerosis. Once daily oral use of fingolimod decreased the annualized relapse rate, inflammatory brain lesion activity and the rate of brain atrophy compared both to placebo and intramuscular administered interferon beta-1a. The drug targets the cardiovascular system as well via sphingosine- 1 phosphate receptors. After initiation of fingolimod therapy transient sinus bradycardia and slowing of the atrioventricular conduction develops. The onset of the effect is as early as 1 hour post administration, while heart rate and conduction normalized in 24 hours in most of the cases. According to the clinical trials symptomatic bradycardia developed in 0.5% of the cases, responding to the appropriate therapy. The incidence of Mobitz I type II atrioventricular blocks and blocks with 2:1 atrioventricular conduction was 0.2% and 0.1%, respectively. All of these cardiovascular events showed regression during observation and no higher degree atrioventricular blocks were detected at the approved therapeutic dose. Following the first dose effect, fingolimod had a moderate hypertensive effect on long-term. For the safety of fingolimod treatment detailed cardiovascular risk stratification of all patients, adequate patient monitoring after the first dose and competency in treating the possible side effects is necessary. In patients with increased cardiovascular risks, treatment should be considered only if anticipated benefits outweigh potential risks and extended monitoring is required.]

LAM KID

JULY 03, 2012

[Secondary osteoporosis in gastrointestinal diseases]

FUSZEK Péter

[Gastrointestinal disease is often overlooked or simply forgotten as a cause of osteoporosis. In a number of gastrointestinal diseases, sometimes because of the medicines used for their treatment, malabsorption syndrome may occur. Malabsorption might lead to insufficient absorption of calcium, phosphate, magnesium, vitamin D, vitamin K and proteins, which can cause osteopenia, osteoporosis and osteomalacia. In this paper, we aim to review the gastroenterological diseases that can lead to osteoporosis and treatment strategies.]

Hypertension and nephrology

FEBRUARY 20, 2012

[Guidelines and clinical practice: clinical audit of CKD-MBD in Hungarian dialyzed patients]

KISS István, KISS Zoltán, SZABÓ András, SZEGEDI János, BALLA József, LADÁNYI Erzsébet, CSIKY Botond, ÁRKOSSY Ottó, TÖRÖK Marietta, TÚRI Sándor, KULCSÁR Imre

[Patients suffering from chronic kidney disease reach the end-stage renal disease in ever growing numbers and this necessitates the start of their dialysis treatment. The alteration of bone and mineral metabolism together with the development of the consequent organ damages starts in early stages of the chronic kidney disease. The goal of our present trial was to survey the alterations or characteristics (laboratory results, concomitant diseases and treatment practice in Hungary) of the calcium (Ca) and phosphate (PO4) metabolisms [mineral-bone disorder occurring in chronic kidney disease (CKD-MBD) or formerly known as secunder hyperparathyreosis or renal ostedistrophy] in patients chronically treated with dialysis. We collected and analyzed data/results from 5334 chronically dialyzed patients. We categorized the patients into different groups according to the guidelines of CKD-MBD so basically by the level of serum calcium and parathormone (PTH) (se-Ca level is below or above 2.4 mmol/l; PHT level is below 65 pg/ml, between 65-150, 150-300, 300-500, 500-800 pg/ml or above 800 pg/ml) and then the characteristic variances were compared. The two most frequent primary causes of end-stage renal disease are hypertension (23%) and diabetes mellitus (22%). Serum calcium level was below the upper limit of the normal range (Ca <2.4 mmol/l) in the greatest proportion of our patients (n=4386), while the parathormone level was elevated (PTH >500 pg/ml) in large portion of patients (n=833). Likewise in a significant part of our patients (44.9%) the parathormone level was low (PTH <150 pg/ml). The concurrent pathological elevation of both the serum calcium and the parathormone levels was found in only a minority of the patients (n=150; 2.8%). All of the drugs influencing calcium-phosphate and parathormone levels were already accessible during the time of origin of the trial in Hungary, although the financial limitations significantly affected their prescription. This is one of the reasons why local treatment practice was not fully aligned with guidelines. On the other hand the application of native vitamin D had an especially low prevalence. To sum up, our results match the European practice on the whole, although we definitely need improvement in reaching the treatment targets and also the clinical treatment practice leading to it. We will prepare a proposal for further analysis and longterm extension of this trial.]