During needle advancement in the Seldinger technique, which finding confirms arterial entry?

Prepare for the Vascular Techniques Exam 3. Study with in-depth questions, hints, and explanations to fully understand vascular techniques. Bolster your knowledge and ensure success on your exam!

Multiple Choice

During needle advancement in the Seldinger technique, which finding confirms arterial entry?

Explanation:
During needle advancement, the critical sign is seeing a bright red, pulsatile blood flash into the needle hub. This flash indicates arterial entry because arterial blood is oxygenated and appears bright red, often spurting with each heartbeat. Venous blood, by contrast, is darker and typically flows non-pulsatile. So a flash of arterial blood is the best indicator that the needle has entered an artery and you can proceed with the next steps of the Seldinger technique.

During needle advancement, the critical sign is seeing a bright red, pulsatile blood flash into the needle hub. This flash indicates arterial entry because arterial blood is oxygenated and appears bright red, often spurting with each heartbeat. Venous blood, by contrast, is darker and typically flows non-pulsatile. So a flash of arterial blood is the best indicator that the needle has entered an artery and you can proceed with the next steps of the Seldinger technique.

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