Rerouting in vascular access infections using a biosynthetic vascular graft (Omniflow® II)

Müller, Daniel; Kohler, Corinne; Weiss, Salome; Widmer, Matthias K. (2023). Rerouting in vascular access infections using a biosynthetic vascular graft (Omniflow® II). Gefässchirurgie, 28(8), pp. 581-587. Springer-Medizin-Verlag 10.1007/s00772-023-01060-x

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Background
Surgical treatment of infected arteriovenous grafts (AVG) while preserving the hemodialysis access remains a challenge. Partial graft excision (PGE) directly followed by interposition grafting (IG) is an established method but is associated with a high rate of local reinfection. This retrospective study investigated the technique of rerouting using a biosynthetic vascular graft (Omniflow® II).

Methods
This was a retrospective analysis of all patients at a tertiary referral center undergoing surgical treatment for AVG infections using PGE and IG with the rerouting technique using Omniflow® II between January 2009 and December 2018. Follow-up data were collected until May 2021.

Results
Fifteen patients (53% male, median age 62 years [range 49-81]) were identified for further analysis, thereof twelve received an Omniflow® II vascular graft. Eleven patients had positive local microbial cultures, with Staphylococcus aureus being the most frequently identified pathogen (9 cases). Mortality and reoperation rates within 30 days were both 0%. Median follow-up was 32 months (range 2–101 months) with a median follow-up index of 0.92 (range 0.18–1). During follow-up a surgical intervention for reinfection was necessary in 3 patients with Omniflow® II at a median of 304 days (range 298–485 days).

Conclusion
Partial graft excision and direct interposition grafting using a biosynthetic Omniflow® II vascular graft is a valid treatment option in selected patients with AVG infections when total graft excision can be avoided. Using a careful rerouting technique, while preserving clinically noninfected graft sections the risk of early reinfection can be minimized and the dialysis access maintained.

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