Abstract
Background and objectives
Autologous arteriovenous fistula (AVF) is the best vascular access for hemodialysis. Distal forearm radiocephalic fistula is the best option, although the primary failure rate ranges from 20% to 50%. The main objective of the PHYSICALFAV trial was to evaluate the effect of preoperative isometric exercise on vascular caliber, percentage of distal arteriovenous fistula, and primary failure rate.
Design, setting, participants, and measurements
The PHYSICALFAV trial (NCT03213756) is an open-label, multicenter, prospective, randomized, controlled trial (RCT). A total of 138 patients were randomized 1:1 to the exercise group (exercises combining a handgrip device and an elastic band for 8 weeks) or the control group (no exercise) and followed up with periodic Doppler ultrasound (DU) examinations.
Results
After 8 weeks of preoperative isometric exercise, in the exercise group, significant increases were detected in venous caliber (2.80 ± 0.95 mm vs 3.52 ± 0.93 mm [p < 0.001]), arterial caliber (2.61 ± 0.82 mm vs 2.74 ± 0.80 mm [p = 0.008]), arterial peak systolic velocity (66.34 ± 19.2 cm/s vs 71.03 ± 21.5 cm/s [p 0.043]), and maximum strength (28.35 ± 9.16 kg vs 32.68 ± 10.8 kg [p < 0.001]). Distal radiocephalic fistulas were performed in 75% of the exercise group patients compared with 50.8% in the control group (p = 0.030). The global primary failure rate was very low in both groups (7% exercise group vs 14% control group [p = 0.373]).
Conclusion
Isometric preoperative exercise can improve vascular caliber and increase the possibility of performing distal arteriovenous fistula, with no significant differences in primary failure rate.
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Physicalfav Working Group
1 NEPHROLOGY DEPARTMENT. HOSPITAL UNIVERSITARIO GREGORIO MARAÑÓN. MADRID. SPAIN, 2 NEPHROLOGY DEPARTMENT. HOSPITAL UNIVERSITARIO INFANTA SOFÍA. MADRID. SPAIN, 3 VASCULAR SURGERY DEPARTMENT. HOSPITAL UNIVERSITARIO GREGORIO MARAÑÓN. MADRID. SPAIN, 4 VASCULAR SURGERY DEPARTMENT. HOSPITAL UNIVERSITARIO LA PAZ. MADRID. SPAIN, 5 NEPHROLOGY DEPARTMENT. HOSPITAL UNIVERSITARIO INFANTA LEONOR. MADRID. ESPAÑA, 6 NEPHROLOGY DEPARTMENT. HOSPITAL UNIVERSITARIO DEL SURESTE. ARGANDA DEL REY. MADRID. SPAIN. 7 CENTRO DE DIÁLISIS DIALCENTRO. MADRID. SPAIN, 8 NEPHROLOGY DEPARTMENT. HOSPITAL DEL VINALOPÓ. ALICANTE, 9 PREVENTIVE MEDICINE DEPARTMENT. HOSPITAL UNIVERSITARIO CLÍNICO SAN CARLOS. MADRID. SPAIN.
Funding
This is an investigator-initiated randomized controlled trial that was funded by a grant from the Spanish Society of Nephrology and ISCIII RETIC REDINREN RD016/009 FEDER funds.
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All authors contributed to the conception and design of the study. Materials were prepared by Inés Aragoncillo, Covadonga Hevia, Silvia Caldés, and Yésika Amezquita. Data were collected by Inés Aragoncillo, Soledad Manzano, Belen Ramirez, Yolanda Hernandez, Yésika Amezquita, Silvia Caldés, and the PHYSICALFAV working group members. Data were analyzed by Inés Aragoncillo, Marian Goicoechea, and Nicolas Macias. The first draft of the manuscript was written by Inés Aragoncillo, and all of the authors commented on the various versions of the manuscript. All authors read and approved the final version of the manuscript.
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The protocol was approved by the Regional Ethics Committee in May 2017.
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Aragoncillo Sauco, I., Hevia, C., Manzano Grossi, S. et al. Effect of preoperative exercise on vascular caliber and maturation of arteriovenous fistula: the physicalfav trial, a randomized controlled study. J Nephrol 34, 763–771 (2021). https://doi.org/10.1007/s40620-020-00907-w
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DOI: https://doi.org/10.1007/s40620-020-00907-w