KDOQI Clinical Practice Guideline for Vascular Access: 2019 Update

....14.1 KDOQI suggests that the use of adjuvant far-infrared therapy to improve AVF primary patency be based on individual circumstances, feasibility, and the clinician’s best judgment and expertise. (Conditional Recommendation, Moderate Quality of Evidence)....

Clinical practice guideline on peri- and postoperative care of arteriovenous fistulas and grafts for haemodialysis in adults-2019

......1.3. We suggest any decision to apply far infrared therapy in adults with end-stage kidney disease during the first 3 months after arteriovenous fistula creation must balance a possible reduction in thrombosis against uncertain effects on maturation and bleeding. (2C)......

UK Kidney Association Clinical Practice Guideline on vascular access for haemodialysis

Far infrared therapy involves placing fistulas under an infrared lamp for part of each dialysis session, which increases fistula size and blood flow over time......First studied in Taiwan in 182 haemodialysis patients dialysing for at least 6 months via an established fistula, by the end of one year the treatment group exhibited greater fistula blood flow (by 71 ml/min) accompanied by greater unassisted patency (86 v 68%, p < 0.01).....It has also been studied as a method to improve maturation.....