The seldinger technique
Figure 9.1. A needle or cannula is inserted in the vessel.
Figure 9.2. Blood is aspirated.
Figure 9.3. The syringe is removed.
Figure 9.4. A guidewire is inserted through the needle or cannula.
Figure 9.5. The guidewire is inserted through the needle or cannula into the vessel, the needle/cannula is then removed leaving the guidewire in the vessel.
Figure 9.6. The invasive line is inserted over the guidewire into the vessel.
Figure 9.7. The invasive line is positioned in its position in the vessel.
Figure 9.8. The guidewire is removed. Watch for bleeding in arterial lines and air embolism for central lines.
Figure 9.9. The invasive line is fixed in its final position. This is usually done with a suture.