Final answer:
The responsibility of the LPN in a coassignment with an RN for a client with hemophilia who requires a blood transfusion is to 1) monitor the client during the transfusion.
Step-by-step explanation:
The responsibility of the Licensed Practical Nurse (LPN) in the coassignment with a Registered Nurse (RN) for a client with hemophilia who requires a blood transfusion is to monitor the client during the transfusion. This involves closely observing the client for any signs of adverse reactions or complications during the transfusion process. The LPN will be responsible for assessing the client's vital signs, monitoring the flow rate of the transfusion, and promptly reporting any abnormal findings or concerns to the RN.