Anesthesiology
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Drug shortages are a frequent challenge in current clinical practice. Certain drugs, (e.g., protamine) lack alternatives and inadequate supplies can limit access to services. Conventional protamine dosing uses heparin ratio-based calculations for heparin reversal following CPB and may result in excess protamine utilization, and potential harm due to its intrinsic anticoagulation. We hypothesized that a fixed 250-mg protamine dose would be comparable, as measured by the activated clotting time, to a 1:1 (1 mg for every 100 U) protamine to heparin ratio-based strategy for heparin reversal and that protamine would be conserved. ⋯ A 1: 1 heparin ratio-based protamine dosing strategy compared to a fixed 250-mg dose resulted in the administration of a larger total dose of protamine no difference in either the initial ACT or the amount postoperative chest-tube bleeding.
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The incidence of central venous catheter-related thrombosis and the long-term effects of thrombosis on catheterized veins in neonates is unknown. We therefore determined the incidence of central venous thrombosis, identified associated risk factors, and evaluated outcomes at 6 months. ⋯ Covert central venous thrombosis is frequent in neonates who have central venous catheters, and complications are most common in patients who have large intravascular thrombi. Neonates with large intravascular thrombi should be followed, and considered for anticoagulation.
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Few studies have assessed the dose ratio of calcium gluconate to calcium chloride or defined the time course of change in serum ionized calcium concentration after intravenous injection. ⋯ NCT05973747 (bioequivalence), NCT05027048, and NCT03867383 (trials included in pharmacokinetic assessment).