Question:

How can one infer that a central venous catheter is placed arterially?
1. Absence of blood flow with blood draws
2. Pulsatile flow of bright red blood into a syringe
3. Pain with insertion of the catheter
4. Paresthesia
5. It is impossible





Answer:

The correct answer for the question "How can one infer that a central venous catheter is placed arterially?" is:

2. Pulsatile flow of bright red blood into a syringe



Explanation

1. Absence of blood flow with blood draws (While the absence of blood flow may suggest malposition, it does not indicate arterial placement.)

2. Pulsatile flow of bright red blood into a syringe (pulsatile flow of bright red blood suggests arterial placement.)

3. Pain with insertion of the catheter (… pain with insertion may indicate line malposition but does not suggest arterial placement.)

4. Paresthesia (…paresthesia does not suggest arterial placement.)

5. It is impossible (Pulsatile flow of bright red blood into a syringe may indicate arterial placement.)



From the manuscript:
Lipid Infusion Through Malpositioned Central Venous Catheter: Head Ultrasound Features
Radiology Case. 2009 Nov; 3(11):13-19


This article belongs to the Pediatric section.




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From the manuscript

Lipid Infusion Through Malpositioned Central Venous Catheter: Head Ultrasound Features

Free full text article: Lipid Infusion Through Malpositioned Central Venous Catheter: Head Ultrasound Features

Abstract
Properly placed central venous catheters have been effective in establishing prolonged access for total parenteral nutrition infusion in ill neonates. However, malposition of the catheter may lead to lethal complications. Malposition and infusion into the epidural venous plexus is most commonly diagnosed on the basis of radiographs and has been confirmed by lumbar puncture. Several studies describe catheter malposition and associated complications. None, however, demonstrate head ultrasound features. We present sonographic findings in a patient who received hyperalimentation for 15 days through a malpositioned lower extremity peripherally inserted central venous catheter.






References



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This article belongs to the Pediatric section.


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