Which statement regarding the use of cuff blood pressures is true?

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If the arterial line becomes unreliable or dislodged,a cuff pressure can be used as a reserve system.In the normotensive,normovolemic patient,little difference exists between the arm cuff blood pressure and the intravascular catheter pressure,and differences of 5 to 10 mm Hg do not generally alter clinical management.The situation is different if the patient has a low cardiac output (CO)or is in shock.The concern is that the cuff pressure may be unreliable because of peripheral vasoconstriction,and an arterial line is generally required.It is usual practice to compare a cuff pressure after the arterial line is inserted.

Which Statement Regarding the Use of Cuff Blood Pressures Is