What do systematic reviews say?

Straight vs coiled catheters

Straight showed no clear difference in technique failure compared with coiled catheters (moderate certainty).

• Catheter type, placement and insertion techniques for preventing catheter‐related infections in chronic peritoneal… 2019 · Cochrane Headline outcomes only
  RR 0.82 [0.51, 1.31]
  4 studies · 442 participants
  Moderate