Hypertension and nephrology

[Article Reports]

VÁLYI Péter

OCTOBER 20, 2013

Hypertension and nephrology - 2013;17(03-04)

COMMENTS

0 comments

Further articles in this publication

Hypertension and nephrology

[The role of juxtaglomerular apparatus in regulation of renal hemodinamics]

ROSIVALL László

[The tubuloglomerular feedback mechanism (TGF) is one of the basic processes in the regulation of renal microcirculation. During the activation of TGF the macula densa senses the tubular fluid and ions loads and initiates a rather complex mechanism in juxtaglomerular apparatus resulting in a change of GFR and tubular load. During the activation of TGF there is humoral signaling in the interstitial extraglomerular area. The concentration of the mediator depends on the extraglomerular interstitial fluid movement through the fenestrated endothelium, which is determined by the actual pressures. A new and fast GFR regulation mechanism is described as a consequence.]

Hypertension and nephrology

[Therapeutic apheresis in pediatry]

TÚRI Sándor, BERECKI Csaba, HASZON Ibolya, PAPP Ferenc

[The possible mechanisms of therapeutic plasma mexchange: 1. the removal of circulatory plasma factor (anti Gbm disease, myasthenia gravis, Guillain Barré syndrome), 2. monoclonal antibody (Waldenström macroglobulinemia, myeloma protein), 3. circulatory immuncomplexes cryoglobulinaemia, myeloma protein, SLE), 4. alloantibody, 5. toxic factor, 6. replacement of a specific plasma factor, 7. a repear of the function of reticulo-endothelial system, 8. the removal of the inflammatory mediators, 9. the changes of the ratio of antigen-antibody which makes immuncomplexes more soluble, 10 stimulation of lymphocyte clones for supporting the cytotoxic therapy. Indications of emergency plasmapheresis: 1. Goodpasture syndrome with rapidly progressive glomerulonephritis and hemoptoe, 2. hyperviscosity syndrome, 3. TTP/HUS, 4. High level of factor VIII inhibitor, 5. respiratory insufficiency Guillain-Barré syndrome, 6. myasthenia gravis, 7. acute mushroom intoxication, or protein bound toxins. Further indications for plasmapheresis: 8. cryoglobulinemia, 9. other cases of rapidly progressive glomerulonephritis (when steroid+ cyclophosphamide are ineffective), 10. Wegener granulomatosis, 11. polyarteritis nodosa, 12. systemic lupus erythematosus (when steroid and cyclophosphamid therapy is not effective or associated with cerebral vasculitis, antiphospholipid syndrome combined with bleeding and thrombosis), 13. focal segmental glomerulosclerosis (resistant for therapy), 14. acute tubulointerstitial nephritis, 15. acute vascular rejection, 16. rheumatoid arthritis systemic type, 17. hypertrigliceridemia (≥25 mM), 18. thyreotoxic crisis, 19. acute necrotizing pancreatitis, 20. acute fulminant hepatitis, 21. paraquat intoxication, 22. snake bite (when antiserum is unavailable), 23. drug intoxication.]

Hypertension and nephrology

[Nutritional status of hemodialysis patients, and the role of dietician in the complex care of renal patients]

POLNER Kálmán, KOVÁCS Lívia, HARIS Ágnes

[In chronic renal failure severe cardiovascular complications develop, which are the cause of death in 50% of the patients. According to recent results, behind the accelerated atherosclerosis, malnutrition and inflammation, developing in patients with chronic renal failure, play significant role. Malnutrition and inflammation show close relationship to the serum albumin level, which is an independent predictor of mortality. Authors studied the nutritional parameters of 94 chronically hemodialysis patients. Patients had been dialysed for more than three months, for 3×4-4.5 hours weekly. Among them 36% had diabetes. According to BMI (body mass index) 42.5% of the patients was normally nourished (20-24 kg/m2), 11.7% of them had malnutrition, 28.7% was overweight, and 17.1% was mildly or moderately obese. Subjective Global Assessment (SGA), calculated by dietician, revealed, that 47.9% of the patients has normal nutritional condition, all the others had some degree of malnutrition. Serum albumin level showed close correlation with the nutritional status, also with an inflammatory marker, the CRP. Only 63.8% of the patients had higher than 40g/l serum albumin. Those, who had higher than 10 mg/l CRP value, had significantly lower serum albumin (38.7±3.4 g/l), comparing to the albumin of the patients, whose CRP was below 10 mg/l (40.5±3.9 g/l, p=0.04). Comparing anthropometrical data, there was no significant difference between diabetic and non-diabetic patients. Grouping patients by their ages, the malnutrition, defined by SGA scores and by serum albumin level, was significantly worse in patients older than 80 years, than in the younger than 50 years old subjects, which signals increased risk of mortality of the elderly patients. A case presentation demonstrates, that malnutrition can be diagnosed at early stage by appropriate nutritional assessment, and it can be corrected by timely and satisfactory energy- and nutrient-substitution, in severe cases by specially prepared nutritional supplements, and thereby the patient’s severe cardiovascular risk can be ameliorated. The successful treatment of hemodialysis patients requires change in medical practice, and close cooperation between physicians and dieticians.]

Hypertension and nephrology

[The prognostic role of placental growth factor in pregnancies complicated by hypertensive disorders]

GULLAI Nóra, MOLVAREC Attila, KAUKER Bea, RIGÓ János Jr.

[Placental growth factor (PlGF) is a member of the proangiogenic VEGF-family; it is mainly produced by throphoblast cells. During the last years numerous studies have shown that circulating PlGF-level in maternal plasma is decreased and its suluble receptor sFlt-1 shows increased expression. In the present study we examined the prognostic accuracy of Alere Triage® PlGF-Assay in hypertensive disorders of pregnancy and its relation with the length of pregnancy. 130 pregnant women were involved in this case-control study (PE: 23, HELLP-syndrome: 20, superimposed praeeclampsia: 17, chronic hypertension: 25, gestational hypertension: 18 and normal control: 27). Blood draw occured between the 22nd and 34th gestational week. PlGF levels were measured by the Alere Triage® PlGF Assay using samples from the maternal plasma. The plasma PlGF-levels of women whose pregnancies were complicated by hypertensive disorders were significantnormotoly lower compared to those who had uncomplicated pregnancies and the decrease were greater in those patients who delivered before the 35th gestational week. The PlGF-test was positive in 93,7% of those women who delivered before the 35th gestational week and in 90,5% of those who delivered before the 37. gestational week. The vast majority of preeclamptic (PE: 95,7%, SIPE: 82,4%) and HELLP-syndrome (95%) patients had positive PlGF tests, the 60% of the chronic hypertension and the 44,4% of the gestational hypertension patients have also shown positive results. The main conclusion of this study is that the PlGF levels using maternal plasma are lower in those pregnancies which are complicated by hypertension and show strong correlation with the severity of the hypertensive disorder. We perceived high sensitivity values in detecting preeclampsia, HELLP-syndrome and superimposed preeclampsia. In the future we may use this method to separate high risk women for hypertensive disorders and it may improve the perinatal outcome]

Hypertension and nephrology

[Recommendation on the Medical Investigation and Treatment of Kidney Stone Disease]

TISLÉR András, MÁTYUS János

All articles in the issue

Related contents

Lege Artis Medicinae

[Comment to the article titled “Exploratory study of outcomes of blood sample mass examinations by rank correlations”]

Clinical Neuroscience

Life threatening rare lymphomas presenting as longitudinally extensive transverse myelitis: a diagnostic challenge

TOLVAJ Balázs, HAHN Katalin, NAGY Zsuzsanna, VADVÁRI Árpád, CSOMOR Judit, GELPI Ellen, ILLÉS Zsolt, GARZULY Ferenc

Background and aims – Description of two cases of rare intravascular large B-cell lymphoma and secondary T-cell lymphoma diagnosed postmortem, that manifested clinically as longitudinally extensive transverse myelitis (LETM). We discuss causes of diagnostic difficulties, deceptive radiological and histological investigations, and outline diagnostic procedures based on our and previously reported cases. Case reports – Our first case, a 48-year-old female was admitted to the neurological department due to paraparesis. MRI suggested LETM, but the treatments were ineffective. She died after four weeks because of pneumonia and untreatable polyserositis. Pathological examination revealed intravascular large B-cell lymphoma (IVL). Our second case, a 61-year-old man presented with headache and paraparesis. MRI showed small bitemporal lesions and lesions suggesting LETM. Diagnostic investigations were unsuccessful, including tests for possible lymphoma (CSF flow cytometry and muscle biopsy for suspected IVL). Chest CT showed focal inflammation in a small area of the lung, and adrenal adenoma. Brain biopsy sample from the affected temporal area suggested T-cell mediated lymphocytic (paraneoplastic or viral) meningoencephalitis and excluded diffuse large B-cell lymphoma. The symptoms worsened, and the patient died in the sixth week of disease. The pathological examination of the presumed adenoma in the adrenal gland, the pancreatic tail and the lung lesions revealed peripheral T-cell lymphoma, as did the brain and spinal cord lesions. Even at histological examination, the T-cell lymphoma had the misleading appearance of inflammatory condition as did the MRI. Conclusion – Lymphoma can manifest as LETM. In cases of etiologically unclear atypical LETM in patients older than 40 years, a random skin biopsy (with subcutaneous adipose tissue) from the thigh and from the abdomen is strongly recommended as soon as possible. This may detect IVL and provide the possibility of prompt chemotherapy. In case of suspicion of lymphoma, parallel examination of the CSF by flow cytometry is also recommended. If skin biopsy is negative but lymphoma suspicion remains high, biopsy from other sites (bone marrow, lymph nodes or adrenal gland lesion) or from a simultaneously existing cerebral lesion is suggested, to exclude or prove diffuse large B-cell lymphoma, IVL, or a rare T-cell lymphoma.

Clinical Neuroscience

[Family planning in multiple sclerosis: conception, pregnancy, breastfeeding]

RÓZSA Csilla

[Family planning is an exceptionally important question in multiple sclerosis, as women of childbearing age are the ones most often affected. Although it is proven that pregnancy does not worsen the long-term prognosis of relapsing-remitting multiple sclerosis, many patients are still doubtful about having children. This question is further complicated by the fact that patients – and often even doctors – are not sufficiently informed about how the ever-increasing number of available disease-modifying treatments affect pregnancies. Breastfeeding is an even less clear topic. Patients usually look to their neurologists first for answers concerning these matters. It falls to the neurologist to rationally evaluate the risks and benefits of contraception, pregnancy, assisted reproduction, childbirth, breastfeeding and disease modifying treatments, to inform patients about these, and then together come to a decision about the best possible therapeutic approach, taking the patients’ individual family plans into consideration. Here we present a review of relevant literature adhering to international guidelines on the topics of conception, pregnancy and breastfeeding, with a special focus on the applicability of approved disease modifying treatments during pregnancy and breastfeeding. The goal of this article is to provide clinicians involved in the care of MS patients with up-to-date information that they can utilize in their day-to-day clinical practice. ]

Clinical Neuroscience

CANOMAD syndrome with respiratory failure

SALAMON András, DÉZSI Lívia, RADICS Bence, VARGA Tímea Edina, HORTOBÁGYI Tibor, TÖMÖSVÁRI Adrienn, VÉCSEI László, KLIVÉNYI Péter, RAJDA Cecília

CANOMAD (chronic ataxic neuropathy, ophthalmoplegia, M-protein agglutination, disialosyl antibodies) syndrome is a rare polyneuropathy. IgM paraproteins react with ganglioside-containing disialylated epitopes resulting in dorsal root ganglionopathy and B-lymphocyte infiltration of cranial and peripheral nerves. Clinical features include ataxia, slight muscle weakness, areflexia, sensory- and cranial nerve symptoms. Case studies have reported the efficacy of rituximab and intravenous immunoglobulin (IVIg) treatments. We present the case of a 57-year-old man, who had difficulty walking, with numbness and clumsiness in all limbs. He had areflexia, vibratory sensation loss and ataxia. Laboratory tests showed IgM monoclonal components and disialosyl antibodies in the serum. Nerve conduction studies indicated severe sensorimotor demyelinating polyneuroradiculopathy. Despite IVIg and rituximab treatments, the patient’s disease course gradually worsened and he died of respiratory failure. Neuropathological examination revealed dorsal column- and dorsal root atrophy with mixed mononuclear cell infiltration. This article aims to draw attention to this syndrome, and the use of early potent immunosuppressive treatment to improve patients’ quality of life.

Clinical Neuroscience

[Ulcerative carpal tunnel syndrome]

KAMONDI Anita, TEIXEIRA Jose Maria, SZIRMAI Imre

[The carpal tunnel syndrome is the most frequent compression-induced neuropathy. A severe but rare clinical manifestation of this disorder associates with ulceration, acral osteo-lysis and mutilation of the terminal phalanges of the second and third fingers. Recognition of this disorder is difficult, because various dermatological and internal diseases might lead to acral ulcerative lesions, and these patients are seldom referred to neurological and/or electrodiagnostic examination. In this article, we present three cases of this rare clinical form of carpal tunnel syndrome and discuss the electrodiagnostic findings. The early diagnosis is important since decompression of the median nerve in due time might prevent mutilation and could significantly improve the patients’ quality of life.]