Aerosolized Surfactant in Adults with Sepsis-Induced Acute Respiratory Distress Syndrome
Antonio Anzueto, M.D., Robert P. Baughman, M.D., Kalpalatha K. Guntupalli, M.D., John G. Weg, M.D., Herbert P. Wiedemann, M.D., Antoni Artigas Raventós, M.D., François Lemaire, M.D., Walker Long, M.D., David S. Zaccardelli, Pharm.D., Edward N. Pattishall, M.D., for The Exosurf Acute Respiratory Distress Syndrome Sepsis Study Group
Background Patients with acute respiratory distress syndrome(ARDS) have a deficiency of surfactant. Surfactant replacementimproves physiologic function in such patients, and preliminarydata suggest that it may improve survival.
Methods We conducted a prospective, multicenter, double-blind,randomized, placebo-controlled trial involving 725 patientswith sepsis-induced ARDS. Patients were stratified accordingto the risk of death at base line (indicated by their scoreon the Acute Physiologic and Chronic Health Evaluation [APACHEIII] index) and randomly assigned to receive either continuouslyadministered synthetic surfactant (13.5 mg of dipalmitoylphosphatidylcholineper milliliter; 364 patients) or placebo (0.45 percent saline;361 patients) in aerosolized form for up to five days.
Results The demographic and physiologic characteristics of thetwo treatment groups were similar at base line. The mean (±SD)age was 50±17 years in the surfactant group and 53±18years in the placebo group, and the mean APACHE III scores atrandomization were 70.4±25 and 70.5±25, respectively.Hemodynamic measures, measures of oxygenation, duration of mechanicalventilation, and length of stay in the intensive care unit didnot differ significantly in the two groups. Survival at 30 dayswas 60 percent for both groups. Survival was similar in thegroups when analyzed according to APACHE III score, cause ofdeath, time of onset and severity of ARDS, presence or absenceof documented sepsis, underlying disease, whether or not therewas a do-not-resuscitate order, and medical center. Increasedsecretions were significantly more frequent in the surfactantgroup; the rates of other complications were similar in thetwo groups.
Conclusions The continuous administration of aerosolized syntheticsurfactant to patients with sepsis-induced ARDS had no significanteffect on 30-day survival, length of stay in the intensive careunit, duration of mechanical ventilation, or physiologic function.
Source Information
From the University of Texas Health Science Center at San Antonio and the South Texas Veterans Health Care System, Audie L. Murphy Memorial Veterans Hospital Division, San Antonio (A.A.); the University of Ohio, Cincinnati (R.P.B.); Baylor College of Medicine, Houston (K.K.G.); the University of Michigan Medical Center, Ann Arbor (J.G.W.); the Cleveland Clinic, Cleveland (H.P. W.); Consorci Hospitalari del Parc Tavli, Sabadel, Spain (A.A.R.); Henri Mondor Hospital, Paris (F.L.); the University of North Carolina, Chapel Hill (W.L.); and Glaxo Wellcome, Research Triangle Park, N.C. (D.S.Z., E.N.P.).
Address reprint requests to Dr. Anzueto at the South Texas Veterans Health Care System, Audie L. Murphy Memorial Veterans Hospital Division, Pulmonary Disease Section (111E), 7400 Merton Minter Blvd., San Antonio, TX 78284.
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