What solution should be prepared on the sterile field for a tuboplasty?

In the context of a tuboplasty, the correct choice involves the use of indigo carmine. This dye is commonly utilized during gynecological procedures because it serves as a tracer that helps in visualizing the fallopian tubes. When performing a tuboplasty, it is essential to assess the patency of the tubes, and indigo carmine aids in this process by allowing the surgeon to visually confirm the flow of dye through the tubes.

While normal saline, Ringer's lactate, and physiological saline are all types of IV fluids that can be used in various surgical settings, they do not provide the necessary visual contrast that indigo carmine does. Saline solutions are typically used for hydration, irrigation, or diluting medications but lack the specific visual identification purpose served by indigo carmine in the context of assessing tubal patency. Thus, the unique properties of indigo carmine make it the appropriate choice for preparation on the sterile field for a tuboplasty.