View clinical trials related to Hemodialysis Complication.
Filter by:Hemodynamic trends will be assessed using the device, in 100 dialysis sessions in 30 patients, who are prone to develop hypotensive episode during dialysis. Sitting blood pressures will be measured immediately prior to each hemodynamic measurement: before initiation of dialysis, every each hour and in the beginning of hypotension episode, just before the end and 10 min after the end of the treatment. Gender, age, height, weight, electrode location and blood pressure data will be entered into the device. The device will measure and calculate hemodynamic parameters on each heart beat during 60 s and provides the averaged parameters. Technology for hemodynamic measurements: The device (NICaS, NI Medical) is a noninvasive regional bioimpedance cardiac measurement and analysis system (FDA 510k clearance no. K080941, 12 June 2009). The US Food and Drug Administration indication for use of the device states 'NICaS is intended to monitor and display hemodynamic parameters in males and females with known or suspected cardiac disorders needing cardiac assessment'. SV will be measured by applying an alternating electrical current of 1.4mA at 30 kHz frequency through the patient's body via two pairs of tetrapolar sensors, one pair placed on the wrist of the nonaccess arm above the radial pulse and the other pair on the contralateral ankle above the posterior tibial pulse (Figure 1). Figure 1 : Sensor location SV is calculated by Frinerman's formula: SV¼(dR/R) - q - (L2/Ri) - (ab)/b - KW - HF [2-4], where dR is the impedance change in the arterial system as a result of intraarterial expansion during systole, R is basal resistance, q is blood electrical resistance, L is the patient's height, Ri is basal resistance corrected for gender and age, KWis the correction of weight according to ideal values, HF is a hydration factor that takes into account the ratio between R and body mass index (BMI), which is correlated to body water volume, ab is the electrocardiogram (ECG) R-R wave interval and b is the diastolic time interval. SV is automatically calculated every 20 s and is the average of three measurements obtained consecutively during 60 s of monitoring. The SV index is calculated as SV/body surface area using the Du Bois formula [11]. Heart rate is calculated from a one channel ECG and cardiac (output) index¼SV index - heart rate/1000. Using an oscillometric method, sitting systolic and diastolic blood pressure measurements were made automatically by the dialysis machine. Mean arterial pressure [2 - (diastolicsystolic)/3], cardiac power index [CPI; mean arterial pressure (MAP) -cardiac index - 0.0022 w/m2; normal range 0.45-0.85w/m2] [12, 13] and total peripheral resistance (MAP/ cardiac index - 80 dyn - s/cm5 - m2; normal range 1600-3000 dyn - s/cm5- m2) [13] will be calculated. As the device measures pulsatile flow and is blinded to constant flow, fluid removal during dialysis has no impact on measurement accuracy. This was recently validated by correlating SV to ECG measurements during hemodialysis treatments. Good correlation was maintained during treatment. Further, NICaS performance immunity to fluid reduction was demonstrated by the maintenance of correlation to ECG results throughout dialysis treatments [9]. The results are drawn on hemodynamic graphs showing the MAP (y-axis) as a function of cardiac index (x-axis); curves of total peripheral resistance index (TPRI) and CPI are displayed. Ranges for the normal population are depicted by a dotted octagon.
Protein-energy wasting (PEW), a hypercatabolic state characterized by loss of muscle mass and fuel reserves, is highly prevalent in hemodialysis patients. Nutritional status and body composition are closely linked to morbidity, mortality and quality of life. Lean tissue mass (LTM) appears to be the best read-out for the association between nutritional status and outcomes. Intradialytic parenteral nutrition (IDPN) is occasionally used with the aim to reduce loss of LTM, but its efficacy has not been established. The goal of this study is to study the effect of IDPN on changes in LTM in hemodialysis patients.
The main objective of this investigation is to assess if an intradialysis virtual reality exercise program during the last two hours of the hemodialysis session results in greater hemodynamic stability than exercise performed during the first two hours of the hemodialysis session. The secondary aims are to assess the impact of intradialysis virtual reality exercise during the last two hours of the hemodialysis session on dialysis efficacy, postdialysis molecules rebound, adherence to exercise, functional capacity, physical activity level, health-related quality of life, cognitive function, morbidity, frailty and dependency. We will also analyze the reliability of muscle strength assessment of lower limb muscles with a handheld dynamometer during hemodialysis.