Sterile gloves, cotton balls, povidone-iodine solution, sterile drapes, lubricant, a sterile collection bottle (often packaged together as a commercial set), and choice of catheter (balloon retention [Foley] catheters are not used in newborns).
Use the smallest catheter possible. Recommendations vary widely; it is best to follow your institution's guidelines if available.
Urethral catheters. Commercially available sizes: 3.5, 5.0, 6.5, and 8F.
3.5F for weight <1000 g.
5F for weight 1000–1800 g.
6.5F for weight 1800–4000 g.
8F for weight >4000 g.
National Association of Neonatal Nurses (NANN) recommendations. 3.5F for weight <1000 g; 5F for weight 1000–1800 g; 8F for weight >1800 g.
Feeding tubes. When used as an alternative, they may increase the risk of trauma or knotting (tubes are softer). 5F feeding tube is sometimes used (not preferred).
3.5F or 5F umbilical catheter. May be used as an alternative: 3.5F for weight <1000 g; 5F for weight >1000 g.