View clinical trials related to Hyperparathyroidism, Secondary.
Filter by:This study is designed to test whether calcium supplementation alone or calcium plus vitamin D reduces the incidence of fractures, reduces high parathyroid secretory activity, and halts bone loss in a population-based sample of women 55+ years of age. - A calcium supplement of 1400 mg/d will significantly reduce the cumulative incidence of spine and appendicular fractures over four years for independently living, rural women 55 years of age and older compared to similar women on their usual diets. - A calcium supplement of 1400 mg/d plus 1100 IU vitamin D/d will significantly reduce the cumulative incidence of spine and appendicular fractures compared to a calcium supplement only.
The purpose of this study is to evaluate the effects of cinacalcet (cinacalcet HCl or Sensipar®/Mimpara®) on cardiovascular events and death in chronic kidney disease (CKD) patients with secondary hyperparathyroidism (HPT) who are receiving dialysis.
The purpose of this study was to compare two different initial dosing schemes for the administration of paricalcitol in hemodialysis patients with secondary hyperparathyroidism: the already in use iPTH/80 scheme, and an iPTH/120 scheme, which corresponds to the immediately lower dose, based on current instructions on paricalcitol dose adjustment. We studied the effectiveness of the two dosing schemes in achieving a target iPTH level (150 – 300 pg/mL)
Obese persons are known to have elevated levels of parathyroid hormone (PTH) and low levels of vitamin D. These hormones are important in regulation of the body's calcium stores and bone health. We would like to investigate these abnormalities and the accuracy of our current diagnostic tests by comparing results of standard assays for vitamin D and PTH to more specific tests, in obese subjects at baseline and as vitamin D is replaced. We will also compare two standard vitamin D replacement regimens to determine if one is more effective. This is a pilot study with two parts: Part 1 will compare levels of PTH and vitamin D using two different assays in obese subjects who have normal vitamin D and those who do not. We plan to enroll 20 subjects who have normal vitamin D levels and 40 subjects who have vitamin D insufficiency. All subjects will fill out questionnaires about the amount of calcium and vitamin D in their diet, and their recent sunlight exposure. We will ask for blood samples so that we can measure levels of calcium, vitamin D, albumin, creatinine, glucose, insulin and the different forms of PTH. Subjects who have vitamin D insufficiency will then be randomized to receive Vitamin D2 or Vitamin D3 in standard doses for eight weeks, in an open label trial. At four and eight weeks, these subjects will fill out the above questionnaires and have the blood tests repeated. For safety purposes, urine calcium will also be monitored.
The majority of patients with moderate to severe chronic kidney disease (CKD) (stages 3 and 4) develop secondary hyperparathyroidism (2°HPT), but the optimal therapy to control hyperparathyroidism in this group is unknown. The National Kidney Foundation presented guidelines in 2003 recommending vitamin D supplementation for vitamin D insufficient patients and active vitamin D therapy in patients with sufficient levels. These guidelines are based on opinion since there are no significant trials to determine if vitamin D supplementation is effective in this population. The active vitamin D metabolites doxercalciferol, paricalcitol, and calcitriol have been shown to effectively suppress parathyroid hormone (PTH), but have not been compared with vitamin D supplementation with a calciferol (ergocalciferol or cholecalciferol). Beyond hyperparathyroidism, small studies suggest vitamin D replacement in vitamin D insufficient non-CKD subjects result in improved pain, feeling of well being, blood pressure and strength. In this proposed study we wish to directly compare the effectiveness of cholecalciferol versus doxercalciferol in suppressing elevated PTH levels in subjects with CKD not on dialysis who have vitamin D insufficiency in a three month study. Secondary endpoints will be change in muscle strength, blood pressure, renal function, and quality of life measures.
The purpose of this study is to evaluate the effects of cinacalcet on markers of bone turnover in patients with kidney disease who are receiving dialysis.
The purpose of this study is to evaluate the effects of Zemplar® Injection and Hectorol® Injection on intestinal calcium absorption in Chronic Kidney Disease Stage 5 subjects on hemodialysis.
The purpose of the study is to evaluate the effects of two phosphate binders, PhosLo and sevelamer, on heart calcification in dialysis patients. The study will use a non-invasive technique, electron beam computed tomography (CT) scanning, to measure calcium in the coronary arteries, the aortic valve, and the mitral valve.
Objectives include description of current practices; assessment over time of K/DOQI goals, clinical outcomes, health resource utilization(HRU) and patient reported outcomes (PRO) and the impact of Sensipar® on these parameters
Left ventricular hypertrophy (LVH) predicts mortality at start of dialysis. Prevention of of LVH is important. It is not known whether secondary hyperparathyroidism might induce LVH. In the present study patients are randomised to 1.25 dihydroxycholecalciferol or no treatment to study the effect on LVH.