What measures help reduce vasospasm during arterial access?

• A. Cold environment, rapid catheter manipulation, minimal anesthesia, and using force.
• B. Adequate warm environment, gentle and steady catheter advancement, adequate local anesthesia, and avoiding excessive force.
• C. Use of vasoactive drugs only; keep room temperature variable.
• D. Increase fluoroscopy time to monitor; apply ice to access site.

Answer: (B)

Vasospasm during arterial access is driven by pain, cold, and mechanical irritation of the vessel wall. Keeping the patient in a warm environment helps maintain the vessel in a relaxed, dilated state. Gentle and steady catheter advancement minimizes irritation of the artery, reducing the trigger for spasm. Adequate local anesthesia blocks pain and the associated sympathetic surge, further reducing the tendency for the vessel to constrict. Avoiding excessive force prevents abrupt, forceful contact with the arterial wall, which can provoke spasm.

In contrast, a cold environment, rushing or forceful manipulation, little anesthesia, or reliance on vasopressive strategies without addressing technique and comfort can increase the risk of spasm. Ice or cold application promotes vasoconstriction, while increased fluoroscopy time exposes the patient to more radiation without preventing spasm, and keeping room temperature variable does not provide a stable, favorable environment for the vessel.