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2018 ; 22
(1
): 101
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Early versus standard initiation of renal replacement therapy in furosemide
stress test non-responsive acute kidney injury patients (the FST trial)
#MMPMID29673370
Lumlertgul N
; Peerapornratana S
; Trakarnvanich T
; Pongsittisak W
; Surasit K
; Chuasuwan A
; Tankee P
; Tiranathanagul K
; Praditpornsilpa K
; Tungsanga K
; Eiam-Ong S
; Kellum JA
; Srisawat N
Crit Care
2018[Apr]; 22
(1
): 101
PMID29673370
show ga
BACKGROUND: The timing of initiation of renal replacement therapy (RRT) in severe
acute kidney injury (AKI) remains controversial, with early initiation resulting
in unnecessary therapy for some patients while expectant therapy may delay RRT
for other patients. The furosemide stress test (FST) has been shown to predict
the need for RRT and therefore could be used to exclude low-risk patients from
enrollment in trials of RRT timing. We conducted this multicenter pilot study to
determine whether FST could be used to screen patients at high risk for RRT and
to determine the feasibility of incorporating FST into a trial of early
initiation of RRT. METHODS: FST was performed using intravenous furosemide
(1 mg/kg in furosemide-naive patients or 1.5 mg/kg in previous furosemide users).
FST-nonresponsive patients (urine output less than 200 mL in 2 h) were then
randomized to early (initiation within 6 h) or standard (initiation by urgent
indication) RRT. RESULTS: FST was completed in all patients (100%). Only 6/44
(13.6%) FST-responsive patients ultimately received RRT while 47/60 (78.3%)
nonresponders randomized to standard RRT either received RRT or died
(P? 0.001). Among 118 FST-nonresponsive patients, 98.3% in the early RRT arm
and 75% in the standard RRT arm received RRT. The adherence to the protocol was
94.8% and 100% in the early and standard RRT group, respectively. We observed no
differences in 28-day mortality (62.1 versus 58.3%, P?=?0.68), 7-day fluid
balance, or RRT dependence at day 28. However, hypophosphatemia occurred more
frequently in the early RRT arm (P?=?0.002). CONCLUSION: The furosemide stress
test appears to be feasible and effective in identifying patients for
randomization to different RRT initiation times. Our findings should guide
implementation of large-scale randomized controlled trials for the timing of RRT
initiation. TRIAL REGISTRATION: clinicaltrials.gov, NCT02730117 . Registered 6
April 2016.