What is the proper sequence to collect a urine sample from a catheter?

What is the proper sequence to collect a urine sample from a catheter?

• A. Unclamp the port, clean with an alcohol wipe, collect the sample, then unclamp the port
• B. Clamp port, clean port with alcohol wipe, obtain sample, unclamp port
• C. Clamp port, collect from the bag without cleaning, then unclamp port
• D. Disconnect the catheter and collect from the bag

Answer: (B)

The key idea is maintaining a sterile, closed system and using aseptic technique when drawing a urine sample from a catheter. Clamp the drainage port first to stop flow into the bag and create a controlled sampling site. Then clean the sampling port with an alcohol wipe to reduce contamination risk. After that, withdraw the urine using a sterile syringe from the port, and finally unclamp the system to restore drainage. This order protects the sample’s sterility and prevents backflow or contamination of the catheter and bag. Collecting from the bag bypasses a sterile site and introduces infection risk. Disconnecting the catheter breaks the closed system, also raising infection risk. Unclamping before cleaning would expose the sampling site to urine flow without proper aseptic preparation, compromising the sample's sterility.

The key idea is maintaining a sterile, closed system and using aseptic technique when drawing a urine sample from a catheter. Clamp the drainage port first to stop flow into the bag and create a controlled sampling site. Then clean the sampling port with an alcohol wipe to reduce contamination risk. After that, withdraw the urine using a sterile syringe from the port, and finally unclamp the system to restore drainage. This order protects the sample’s sterility and prevents backflow or contamination of the catheter and bag.

Collecting from the bag bypasses a sterile site and introduces infection risk. Disconnecting the catheter breaks the closed system, also raising infection risk. Unclamping before cleaning would expose the sampling site to urine flow without proper aseptic preparation, compromising the sample's sterility.