Percentage of silver Nitrate used in Credes method
**Core Concept**
The Credé method is a procedure used to prevent gonococcal ophthalmia neonatorum, a serious eye infection that can occur in newborns. It involves the application of a silver nitrate solution to the eyes of the newborn to create an acidic environment that is unfavorable for the growth of gonococci. The concentration of silver nitrate in the Credé method is crucial for its effectiveness.
**Why the Correct Answer is Right**
The correct answer is 1% silver nitrate. This concentration is sufficient to create an acidic environment that inhibits the growth of gonococci, while also minimizing the risk of toxicity to the newborn's eyes. The 1% solution is typically prepared by dissolving 1 gram of silver nitrate in 100 milliliters of sterile water.
**Why Each Wrong Option is Incorrect**
* **Option A:** 0.1% silver nitrate is too dilute to be effective in preventing gonococcal ophthalmia neonatorum.
* **Option B:** 2% silver nitrate is too concentrated and may cause toxicity to the newborn's eyes.
* **Option C:** 0.5% silver nitrate is not a standard concentration used in the Credé method.
**Clinical Pearl / High-Yield Fact**
The Credé method should only be performed by trained healthcare professionals, as the application of silver nitrate can cause chemical conjunctivitis if not done properly.
**Correct Answer:** B. 2% silver nitrate