False-negative aspirations typically occur when a clinician has failed to develop adequate negative pressure with the thumb ring
A) True
B) False
B
Explanation: B) False-negative aspiration occurs when a bevel is in contact with a vessel wall. The negative pressure retracts the vessel wall into the lumen of the needle, blocking the flow of blood through the needle into the cartridge.
Health Professions
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If there is an accident or injury caused by carelessness, the person responsible may be considered to be legally guilty of:
A) Slander B) Malpractice C) Negligence D) Libel
Health Professions
The effects of sympathetic stimulation of the iris are:
A. vasoconstriction B. relaxation (for far vision) C. contraction of the circular muscle and pupil constriction D. contraction of the radial muscle and pupil dilation
Health Professions