The sentence is grammatically ambiguous because the pronoun "he" could refer to either the doctor or the nurse. Depending on who was running behind, you could continue it in two different ways:

1.  **If the doctor was late:** "...and he wanted her to start prepping the patient for the 10 o'clock surgery."
2.  **If the nurse was late:** "...to see if he needed to find a replacement for the morning shift."
