Povidone-iodine

Definition

Povidone-iodine is an antiseptic solution used to disinfect skin and surfaces by releasing iodine, which kills a broad spectrum of microorganisms. It is commonly used in medical settings for preoperative skin preparation and wound care.

5 Must Know Facts For Your Next Test

1. Povidone-iodine is effective against bacteria, viruses, fungi, and protozoa.
2. It works by releasing free iodine, which penetrates microbial cell walls and disrupts their metabolic functions.
3. The solution is often used in concentrations ranging from 5% to 10% for various antiseptic applications.
4. Povidone-iodine has a lower risk of causing skin irritation compared to elemental iodine.
5. Its effectiveness can be reduced in the presence of organic matter such as blood or pus.

Review Questions

• What types of microorganisms can povidone-iodine effectively kill?
• How does povidone-iodine disrupt microbial cells?
• Why might the presence of organic matter reduce the effectiveness of povidone-iodine?

Related terms

Antiseptic:

A substance that inhibits the growth and development of microorganisms on living tissues.

Iodophor: A complex of iodine with a solubilizing agent or carrier that releases free iodine when in solution.

Disinfectant: A chemical agent used to destroy or inhibit the growth of harmful organisms on inanimate objects.