A nurse in the emergency department is monitoring a client who is receiving dopamine to treat hypovolemic shock. Which of the following findings should the nurse identify as an indication for increasing the client's dopamine dosage?

Choice A reason: Aspirating the catheter to check for a brisk blood return is not typically recommended as a routine action when replacing the dressing of a PICC line used for TPN. This action is performed to verify patency and placement of the catheter, but it is not directly related to the dressing change procedure.

Choice B reason: Using sterile technique for the procedure is essential when replacing the dressing of a PICC line. Maintaining sterility is crucial to prevent infection, as the PICC line provides direct access to the central venous system. The nurse should use sterile gloves and follow aseptic protocols to minimize the risk of introducing pathogens at the catheter insertion site.

Choice C reason: Cleansing the insertion site with hydrogen peroxide is not recommended for PICC line care. Hydrogen peroxide can be damaging to the tissue and may delay healing. Instead, a chlorhexidine-based antiseptic is typically used to clean the skin around the insertion site during dressing changes to reduce microbial flora and prevent infection.

Choice D reason: Flushing the TPN port with 20 mL of 0.9% sodium chloride is a practice used to maintain catheter patency, but it is not part of the dressing change procedure. Flushing is usually done before and after administering medication or nutrition, not specifically during a dressing change.

Choice A reason: The fluctuation of fluid in the water-seal chamber does not necessarily mean that the lung is fully re-expanded. The water-seal chamber's fluid level fluctuates with the client's breathing because it reflects the changes in intrathoracic pressure.

Choice B reason: The statement "Your breathing pattern causes this" is correct. The fluctuation, also known as tidaling, in the water-seal chamber is normal and occurs in response to the client's breathing. When the client inhales, negative pressure in the chest cavity causes the fluid level to rise, and when the client exhales, the pressure becomes positive, causing the fluid level to fall.

Choice C reason: Suction pressure that is too high can cause continuous bubbling in the suction control chamber but does not directly cause the fluid in the water-seal chamber to rise and fall. The suction control chamber's bubbling should be steady and gentle when the suction is set correctly.

Choice D reason: Continuous bubbling in the water-seal chamber may indicate an air leak, which is a problem that needs to be addressed. However, normal fluctuation with breathing is not indicative of an air leak.