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Find 2,724 clinical trials for rheumatoid arthritis near Phoenix, Arizona. Connect with research centers in your area.
Showing 2001-2020 of 2,724 trials
NCT02483702
Blood transfusions are required for patients undergoing a craniosynostosis repair due to the significant amount of blood loss. Irradiated or non-irradiated transfusions have many risks involved including elevated potassium levels and graft versus host disease (TA-GVHD). Irradiated blood is able to destroy the leukocytes responsible for TA-GVHD, but it adversely causes elevated extracellular potassium due to hemolysis of the RBC's. When this blood is transfused, it may introduce too much extracellular potassium (\> 6.5 meq/L) into the patient causing interference with the heart's conduction system significantly increasing the risk for hemodynamic changes, cardiac arrhythmias, and cardiac arrest. Hyperkalemia from rapid transfusions occurs much more frequently than TA-GVHD; however, both complications are under-reported. The study aims to evaluate the risk of irradiated versus non-irradiated blood in patients under the age of 6 months undergoing a craniosynostosis repair. This will be done by comparing the levels of extracellular potassium pre-transfusion, during transfusion, immediately after transfusion, and 30 minutes after the completion of transfusion. The investigators hypothesize that the patients who receive irradiated blood will have an increased extracellular potassium level compared to those who receive non-irradiated blood.
NCT00975000
Hyperparathyroidism (HPT) is common in people with a kidney transplant. Patients with HPT often have high parathyroid hormone (PTH) levels and may have large parathyroid glands in the neck. Patients with HPT can develop bone disease (osteodystrophy). This bone disease can cause bone pain, fractures, and poor formation of red blood cells. Other problems from HPT may include increases in blood levels of calcium (hypercalcemia) and low blood levels of phosphorus (hypophosphatemia). The high calcium levels may cause calcium to deposit in body tissues. Calcium deposits can cause arthritis (joint pain and swelling), muscle inflammation, itching, gangrene (death of soft tissue), heart and lung problems or kidney transplant dysfunction (worsening of kidney transplant function). The purpose of this study is to evaluate the effects of cinacalcet (Sensipar/Mimpara) on high calcium levels in the blood in patients with HPT after a kidney transplant.