Inclusion Criteria:

- Be undergoing a bladder invasive procedure with or without planned urinary catheter on Mayo Clinic Gonda 7 Outpatient Procedure Center.

Exclusion Criteria:

• Are unable to grant informed consent or comply with study procedure.
• Allergy or known sensitivity to magnesium or Renacidin.
• Expected or high risk of bladder extravasation.
• Ongoing atrial fibrillation prior to surgery.
• Are undergoing emergency surgery.
• Are pregnant.
• Known hypermagnesemia.
• Patients with neuromuscular weakness (e.g., Myasthenia gravis) due to magnesium's muscle weakening effect.
• Patients with myocardial compromise or cardiac conduction defects because of magnesium's anti-inotropic effects.
• Patients with renal insufficiency, glomerular filtration rate less than 30, since Magnesium is eliminated by the kidneys resulting in exaggerated rise in serum magnesium.
• Patients with concomitant use of a calcium channel blocker since magnesium sulfate could act synergistically to suppress muscular contractility.