Final answer:
E) Edema is the condition that may affect the pressure at which arterial fluid must be injected to overcome the initial resistance.
Step-by-step explanation:
The condition that may affect the pressure at which arterial fluid must be injected to overcome the initial resistance is Edema.
Edema refers to the accumulation of fluid in the interstitial spaces, causing swelling. This increased fluid volume in the tissues increases the resistance to fluid flow, thereby requiring higher pressure to overcome the initial resistance and deliver the fluid adequately.
For example, if a patient has edema in their leg, the healthcare provider may need to use higher pressure when injecting arterial fluid into the leg for diagnostic or treatment purposes.