The early diagnosis of metastatic pulmonary calcification is beneficial, as some patients may develop restrictive changes in respiratory function or in some cases lethal acute respiratory distress. The aim of the study was to evaluate whether scanning with ⁹⁹(m)Tc DPD might be useful in early diagnosis of pulmonary calcification in setting of chronic renal failure and hemodialysis and if presence of pulmonary calcification is associated with an abnormality in respiratory parameters. Forty-two patients with end-stage renal disease, who were treated by regular haemodialysis, were investigated. Twenty five (59.5%) out of forty two patients had increased lung uptake of ⁹⁹(m)Tc DPD at whole body scintigraphy-grade 2 group. These patients were on dialysis 149±26 months compared with 57±16 months in 17 patients with a normal lung uptake of ⁹⁹(m)Tc DPD at whole body scintigraphy- grade 1 group (p<0.01). In grade 2 group 22 patients (88%) had significantly lower (p<0.01) parameters of spirometry (FEF25-75, FEF75 FEF50, FEF25) compared to predicted values while in grade 1 group the parameters were significantly lower in only six patients (35.3%). There was statistically insignificant difference between these two groups regarding parathyroid hormone level (p>0.05). These observations confirm previous findings that scintigraphy with ⁹⁹(m)Tc DPD may be efficious in early diagnosis of pulmonary calcification in hemodialised patients as well as the fact that spirometry is useful in patients with confirmed pulmonary calcifications.

Uremic lung is different entity then oedema present in cardiovascular diseases or in adult respiratory distress syndrome as well. This state is one of the possible complications in patients with chronic renal failure (CRF) receiving regular hemodialysis (HD). There are several studies suggesting that in these patients in 30-40% cases pulmonary hypertension was developed. It is known that patients with primary pulmonary hypertension have peripheral airway obstruction The data also showed that primary as well secondary pulmonary hypertension are more often developed in females; even real reason is still unknown. The aim of the study was to estimate the ventilator function improvement in patients with CRF receiving regular HD related to sex differences. The study population consisted in 39 patients with CRF, with no cardiac and pulmonary diseases. These patients were treated by regular hemodialysis using bicarbonate or acetate mode, respectively. They were divided into two groups according to the sex. Spirometry parameters before and after onset of hemodialysis were recorded. The results were analyzed using Student t-test and presented as mean +/-SD. All p values <0,05 were considered significant. The result showed that ventilatory function in male patients is significantly improved, especially VC and FEV1, whereas in female patients improvement had not statistical significance. It can be concluded that one of the possible reasons for slight improvement of ventilator function in female patients is pulmonary hypertension.

Aim:Cardiovascular diseases are leading cause of death in patients with chronic renal failure. The aim of our study was to establish connection between levels of homocysteine and traditional and nontraditional risk factors for developing cardiovascular diseases in dialysis and pre dialysis patients.Methods:We included 33 pre dialysis (23 in stage three and 10 in stage four of chronic kidney disease) and 43 patients receiving hemodialysis longer than six months. Besides standard laboratory parameters, levels of homocysteine and blood pressure were measured in all patients. Glomerular filtration rate was measured in pre dialysis patients and dialysis quality parameters in dialysis patients.Results:Homocysteine levels were elevated in all patients (19±5.42mmol/l). The connection between homocysteine levels and other cardiovascular diseases risk factors was not established in pre dialysis patients. In patients treated with hemodialysis we found negative correlation between homocysteine levels and patients’ age (p<0.05) and positive correlation between homocysteine levels and length of dialysis (p<0.01) as well as between homocysteine and anemia parameters (erythrocytes, hemoglobin), (p<0.01). Homocysteine and LDL (and total cholesterol) were in negative correlation (p<0.01).Conclusion:Homocysteine, as one of nontraditional cardiovascular diseases risk factors, is elevated in all patients with chronic renal failure and it’s positive correlation with some other risk factors was found.

End-stage renal disease (ESRD) and its treatment modules affect almost all organs and organ systems including vascular endothelium. It is well known that disturbance of vasoactive substances (nitric oxide -NO and endothelin-1 -ET-1) production appears in these patients. There is a small number of studies which investigated serum levels of NO and ET-1 in ESRD patients treated with continuous ambulatory peritoneal dialysis (CAPD). Therefore our study aimed to measure serum levels of NO and ET-1 in this population. This study included 23 ESRD patients (10 males and 13 females) treated with CAPD, mean age 55.8 AE 15.8 years. Mean duration of CAPD treatment in this group of patients was 3.4 AE 14.7 years. Besides this group of patients (CAPD), we included a second group which consisted of 30 healthy controls [14 males, 16 females, mean age 51.8 (AE15.6) years]. Our results show significantly higher serum levels of NO in CAPD patients ( x AE SD ¼ 19.09 AE 6.9) in comparison to the control group ( x AE SD ¼ 9.5 AE 1.9) (p50.05). There was no significant difference in serum levels of ET-1 between CAPD patients ( x AE SD ¼ 7.3 AE 5.6) and the control group ( x AE SD ¼ 6.6 AE 4.2), (p40.05). From our results, we concluded that imbalance in production of vasoactive substances is present in CAPD patients. This imbalance can lead to disturbance in local blood flow control. These pathophysiological mechanisms can cause significant hemodynamic disturbance (hypertension) and atherosclerosis.

Introduction: Nitric oxide (NO) plays an important role in a wide range of physiologic and pathophysiological processes. A major mediator of endothelial function, NO regulates vasodilatory and antithrombotic actions in the vasculature and plays a role in reproductive functions, bronchodilation, bone formation, memory, insulin sensitivity, and gastrointestinal relaxation. Impaired NO bioactivity is strongly associated with endothelial dysfunction. NO, an L-arginine derivative, also exerts a variety of renal and extrarenal physiological and pathophysiological effects. It seems that NO synthetic pathway could have a key role in mediating the complex hemodynamic and hemostatic disorders associated to the progression of renal disease. It remains unclear whether endogenous NO production is increased or decreased in patients with chronic renal failure. The objective of this study was to present the effect of different dialysis treatment on NO serum concentration in patients with chronic renal failure. Patients and Methods: To evaluate endogenous NO production in these patients we studied plasma NO 2 and NO 3 levels (determined with the Griess method) in patients who underwent regular continuous ambulatory peritoneal dialysis or repeated haemodialysis and in healthy subjects. The study included 51 patients suffering from chronic renal failure and 30 healthy subjects. Results: Our results show that patients with chronic renal failure had a significantly higher NO serum concentration than controls. These values did not differ between patients on haemodialysis and those on continuous ambulatory peritoneal dialysis. NO serum concentration did not differ between female and male independently of the patient's treatment. Discussion and Conclusion: From obtained results we can concluded that uremia is associated with excessive systemic NO release independently of the patient's treatment. Alter (increase) NO synthesis may help to explain some pathological changes seen in uraemia such as bleeding tendency, a well-known complication of uremia and hemodialysis hypotension. Primljeno: 22. 3. 2008. 22. Stefanovic V, Nesic V, Stojimirovic B. Treatment of insulin oxide production by Human peritoneal mesothelail cell.

Higher levels of ET-1 in dialysis patients over healthy subjects is associated with lower parameters of lung function tests. A possible pathophysiological mechanism for deterioration of pulmonary function might be explained by progression of inflammation, pulmonary oedema also known as "uraemic lung" or/and the progression of pulmonary hypertension.

This is the first population model that accounts for the influence of fT and THDT on radioiodine kinetics. The model could be used for further investigations into the correlation between thyroidal exposure to I and the outcome of radioiodine therapy of benign thyroid disease as well as the development of dosing recommendations.

<zakljucak> Prezentovana dostignuca u istrazivanju mozdanih funkcija potvrdjuju ekspanziju uspesnih neuroradioloskih tehnika, ali su istovremeno i izazov da se razvijaju savrsenije tehnike kojima bi se mozdana aktivnost jos jasnije osvetlila.