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Consider two parallel straight wires carrying a current of 10 A and 20 A in the same direction and separated by a distance of 20 cm. Calculate the magnetic field at a point "P2", midway between the wires. Also, evaluate the magnetic field when the direction of the current is reversed in the second wire.
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A coaxial cable consists of a central copper conductor used for transmitting signals, followed by an insulator shield, a metallic braided mesh that prevents signal interference, and a plastic layer that encases the entire assembly.
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Vagus Nerve Stimulation as a Tool to Induce Plasticity in Pathways Relevant for Extinction Learning
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[Knotted Seldinger wire].

A Fiala1, B Glodny2, I H Lorenz3

  • 1Universitätsklinik für Anästhesie und Intensivmedizin, Medizinische Universität Innsbruck, Anichstr. 36, 6020, Innsbruck, Österreich. Anna.Fiala@reflex.at.

Der Anaesthesist
|December 15, 2015
PubMed
Summary
This summary is machine-generated.

A guidewire for central venous catheter placement became kinked and lodged in tissue after insertion via the left subclavian vein. Despite interventional radiology attempts, the guidewire was left in situ without detected venous thrombosis.

Keywords:
Central venous catheterDevice removalElasticitySubclavian veinTensile strength

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Area of Science:

  • Vascular surgery
  • Interventional radiology
  • Medical device complications

Background:

  • Central venous catheters are essential for various medical treatments.
  • The Seldinger technique is the standard method for guidewire insertion.
  • Complications during guidewire placement can necessitate alternative management strategies.

Observation:

  • A case report details a guidewire complication during central venous catheterization via the left subclavian vein using the landmark technique.
  • The guidewire kinked, perforated the vessel wall, and formed loops within adjacent tissue.
  • Multiple interventional radiology attempts to retrieve the impacted guidewire were unsuccessful.

Findings:

  • The guidewire could not be removed due to patient condition and procedural risks.
  • The decision was made to leave the guidewire in situ.
  • No evidence of local venous thrombosis was detected post-procedure.

Implications:

  • This case highlights potential risks associated with guidewire manipulation, even with experienced intervention.
  • It underscores the importance of careful technique and patient assessment in managing device-related complications.
  • Leaving retained guidewires in situ may be a viable option in select cases, warranting further investigation into long-term outcomes.