• Maddalena Alessandra Wu, Riccardo Colombo, Gian Marco Podda, and Marco Cicardi.
• Department of Biomedical and Clinical Sciences "Luigi Sacco", ASST Fatebenefratelli Sacco, Luigi Sacco Hospital, University of Milan, Via Giovanni Battista Grassi, 74, 20157, Milan, Italy. maddalena.wu@unimi.it.
• Intern Emerg Med. 2019 Aug 1; 14 (5): 723-730.

AbstractIdiopathic systemic capillary leak syndrome (ISCLS) presents with recurrent potentially life-threatening episodes of hypovolemic shock associated with severe hemoconcentration and hypoproteinemia. Timely recognition is of paramount importance because ISCLS, despite resembling other kinds of hypovolemic shock, requires a peculiar approach, to prevent life-threatening iatrogenic damage. Due to the rarity of this condition with only scattered cases described worldwide, evidence-based recommendations are still lacking. Here, we summarize our 40 years' experience in treating shock in ISCLS patients to derive a therapeutic algorithm. Records from 12 ISCLS patients (mean follow-up is 6 years, with a mean age at symptoms' onset of 51.5 years) were informative for treatment modalities and outcome of 66 episodes of shock. Episodes are divided in three phases and treatment recommendations are the following: prodromal symptoms-signs (growing malaise, oligo-anuria, orthostatic dizziness) last 6-12 h and patients should maintain rigorous bed rest. The acute shock phase lasts 24-36 h. Patients should be admitted to ICU, placed on restrictive infusion of fluids favoring cautious boluses of high-molecular-weight plasma expanders when SAP < 70 mmHg; monitored for cerebral/cardiac perfusion, myocardial edema and signs of compartment syndrome. The post-acute (recovery) phase may last from 48 h to 1 week. Monitor for cardiac overload to prevent cardiac failure; in case of persistent renal failure, hemodialysis may be necessary; consider albumin infusion. Complications listed by frequency in our patients were acute renal failure, compartment syndrome and neuropathy, rhabdomyolysis, myocardial edema, pericardial-pleural-abdominal effusion, cerebral involvement, acute pulmonary edema and deep vein thrombosis.

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