Teeth are harder than bone

Which is the most beneficial medication treatment for a patient experiencing detrusor sphincter dyssynergia?

a. Alpha-blocker b. Beta-blocker c. Vasodilator d. Diuretic

What is the purpose of a tracheostomy tube obturator?

a. To minimize trauma to the tracheal muco-sal during insertion b. To provide a patent airway should the tube become obstructed c. To help ascertain the proper tube position by radiograph d. To provide a means to inflate and deflate the tube cuff