Best way to sterilize all-glass syringes is: September 2007
**Core Concept**
Sterilization of medical equipment is crucial to prevent the transmission of infectious diseases. All-glass syringes are heat-sensitive, requiring a method that does not involve exposure to high temperatures. Autoclaving, dry heat sterilization, and chemical disinfection are common methods, but each has its limitations.
**Why the Correct Answer is Right**
The best way to sterilize all-glass syringes is through the use of ethylene oxide gas. Ethylene oxide gas is a potent sterilant that is effective against bacteria, viruses, and fungi, including spores. It is a low-temperature process, typically occurring between 30°C to 50°C, making it ideal for heat-sensitive equipment like glass syringes. Ethylene oxide reacts with the molecular bonds of microorganisms, ultimately leading to their inactivation.
**Why Each Wrong Option is Incorrect**
**Option A:** Autoclaving involves high-temperature steam, which can cause glass syringes to shatter or become deformed. Autoclaving is suitable for metal and plastic equipment but not for heat-sensitive glass items.
**Option B:** Dry heat sterilization involves heating the equipment to high temperatures (160°C to 170°C) for prolonged periods, which can also cause damage to glass syringes. This method is more suitable for equipment that can withstand high temperatures.
**Option C:** Chemical disinfection, although effective against some microorganisms, may not be sufficient to eliminate all forms of microbial life, including spores. This method is often used as a supplementary step after sterilization.
**Clinical Pearl / High-Yield Fact**
When sterilizing heat-sensitive equipment, it's essential to consider the type of material and the method's efficacy against a broad spectrum of microorganisms. Always consult the manufacturer's guidelines for specific sterilization recommendations.
**Correct Answer:** D. Ethylene oxide gas.