Unveiling the Legacy of Dr. Kenneth Charles Appell: The Unsung Surgeon behind the Arteriovenous Fistula Revolution

Arteriovenous fistula (AVF) surgeries in chronic kidney disease patients for hemodialysis represent an introductory step into the vascular surgery field. These procedures serve as a cornerstone learning experience, allowing trainees to hone their skills in anastomosis creation. Radiocephalic fistula for hemodialysis is the most effective vascular access since it was developed at the Bronx Veterans Administration Hospital in New York by Charles Kenneth Appell in February 1965. Sadly, his contribution is not mentioned in most of the available literature.[1] The historical vignette elucidates certain facets of Dr. Appell's life story, as well as the chronological progression of radiocephalic fistula development. Delving into the history of AVF creation, especially considering the eponym of the Brescia–Cimino fistula, is paramount for understanding the progression of vascular access. Despite the continued use of glass cannulae by pioneers like Kolff, challenges such as thrombosis, heparin-induced bleeding, and vascular damage from repeated cannulation persisted.[2] Even with the introduction of AV shunts using polytetrafluoroethylene tubing, complications such as local bleeding, shunt occlusion, and phlebitis remained prevalent, often leading to failures within a few months. Addressing the persistent challenge of reliable vascular access, a crucial aspect of effective hemodialysis provision, Dr. Kenneth Charles Appell emerged as a groundbreaking but often overlooked figure [Figure 1]. Pioneering his innovative techniques at the Veterans Administration (VA) Hospital in Bronx, New York, Dr. Appell's contributions were instrumental in advancing vascular access. However, despite Dr. Appell's pioneering role, the procedure he developed is frequently credited to internists Dr. Michael J. Brescia and Dr. James E. Cimino, who managed the patients Dr. Appell operated on at the VA Hospital.[3] The eponym "Brescia–Cimino fistula," commonly used to refer to the technique, unfortunately, excludes Dr. Appell, failing to acknowledge his significant contributions.Figure 1: Dr Kenneth Charles AppellBorn into a German-Czech immigrant family in 1923, Ken grew up in Astoria, Queens, New York City. After flying in the Pacific for the US Navy during World War II, he attended Manhattan College and the Georgetown University School of Medicine; married Marcella Varmuza in 1955; and set up practices in various hospitals in New York City and Westchester County before moving his young family to Red Hook in 1967, establishing a private practice in Rhinebeck and becoming a surgeon at Northern Dutchess Hospital. What few know, however, Dr. Appell helped change the world of health care in a major way. In 1963, he was attached as a surgeon to the renal care unit of the Bronx VA Hospital, and while there revolutionized kidney dialysis by inventing a procedure known as the AVF, which made access to blood vessels vastly easier and safer than it had been up till then. The first 14 cases were published in a classic paper.[4] The radiocephalic AVF was not immediately successful. In February of 1965, 1 year before Appell's first documented success, his initial attempt resulted in insufficient blood flow in the fistula and thrombosis, due to the use of an insufficiently sized vein and the improper preparation of the patient before the procedure, causing hypovolemia and hypotension. Appell reattempted the procedure in 1966, using the cephalic vein on the radial aspect of the wrist to ensure adequate circulation through the fistula. The first successful iteration of the AVF involved administering local anesthesia, a 3-cm transverse incision in an area approximating the location of the radial pulse, and mobilizing the radial artery along with a nearby vein, using number 0 silk loops. Then, smaller longitudinal incisions, ranging from 0.3 to 0.5 cm, were made on both of the mobilized vessels, followed by a side-to-side anastomosis, using running number 0 arterial silk. Of the 16 patients under the care of the hemodialysis team at the Bronx VA Hospital, a radiocephalic fistula was successfully created in 13, and as of July 1966, these patients had received 800 (110 months-worth) total dialyses. By creating an upper extremity fistula, Appell managed to attain reliable vascular access and adequate blood flow without an external device or the use of anticoagulants [Figure 2]. The procedure gained widespread recognition after its publication in the New England Journal of Medicine with lead authors Brescia and Cimino [Figure 3] and failing to appreciate the surgical work of Dr. Appell.Figure 2: The first Radio- Cephalic arteriovenous fistulaFigure 3: James E Cimino, Kenneth C Appell, and Michael BresciaHowever, in 2007, he was honored by the Vascular Access Society of the United States, which lauded him for contributions to medical science that "have immeasurably benefited countless chronic kidney disease patients requiring hemodialysis." In the tapestry of medical advancement, Dr. Charles Appell emerges as a luminary whose brilliance illuminated the path toward improved patient outcomes and enhanced quality of care. Let us honor his memory by recognizing not only the achievements of the AVF but also the indomitable spirit of innovation and compassion that defined his legacy. Renowned surgeon Dr. Kenneth Charles Appell, peacefully passed away on June 14, 2023, at the age of 100, at his residence in Red Hook. Today, the AVF is widely accepted throughout the world as the lifeline for chronic kidney disease patients and remains the procedure of choice. This is truly a great milestone in the history of invention for managing end-stage renal diseases, and the vascular fraternity remains indebted to his contribution. Financial support and sponsorship Nil. Conflicts of interest There are no conflicts of interest.