Copyright © 2016 by the Society of Critical Care Medicine and Wolters Kluwer Health, Inc. All Rights Reserved. Online Case Report e1246 www.ccmjournal.orgDecember฀2016฀•฀Volume฀44฀•฀Number฀12 Objective:฀To฀describe฀a฀case฀of฀partial฀nephrogenic฀diabetes฀insipidus฀ in฀a฀burned฀patient฀after฀prolonged฀delivery฀of฀low฀inspired฀concentra- tions฀of฀sevofurane฀via฀an฀Anesthetic฀Conserving฀Device. Data Sources:฀Clinical฀observation. Study Selection:฀Case฀report. Data Extraction:฀Relevant฀clinical฀information. Data Synthesis:฀A฀34-year-old฀man฀was฀admitted฀with฀burns฀cov- ering฀52%฀of฀his฀total฀body฀surface฀area.฀Mechanical฀ventilation฀ was฀provided฀during฀sedation฀with฀continuous฀infusions฀of฀sufent- anil฀and฀midazolam.฀Sedation฀became฀increasingly฀diffcult,฀and฀in฀ order฀to฀limit฀administration฀of฀IV฀agents,฀sevofurane฀was฀added฀ to฀ the฀ inspiratory฀ gas฀ fow.฀ This฀ was฀ provided฀ using฀ an฀ Anes- thetic฀Conserving฀Device฀and฀continued฀for฀8฀days.฀The฀patient฀ rapidly฀developed฀polyuria฀and฀hypernatremia฀with฀an฀inappropri- ate฀decrease฀in฀urinary฀osmolality.฀Administration฀of฀desmopres- sin฀resulted฀in฀only฀a฀modest฀effect฀on฀renal฀concentrating฀ability.฀ After฀ cessation฀ of฀ sevofurane,฀ all฀ variables฀ returned฀ to฀ normal฀ within฀5฀days.฀The฀results฀of฀further฀investigations฀(cerebral฀com- puted฀tomographic฀scan,฀cerebral฀magnetic฀resonance฀imaging,฀ and฀serum฀arginine฀vasopressin฀concentration)฀were฀compatible฀ with฀ a฀ diagnosis฀ of฀ partial฀ nephrogenic฀ diabetes฀ insipidus.฀ The฀ temporal฀ sequence฀ of฀ clinical฀ fndings฀ in฀ relation฀ to฀ sevofurane฀ administration฀ suggests฀ that฀ the฀ sevofurane฀ was฀ the฀ probable฀ underlying฀cause. Conclusions:฀Clinicians฀should฀be฀aware฀of฀the฀possibility฀of฀sevo- furane-induced฀diabetes฀insipidus฀not฀only฀during฀general฀anes- thesia฀but฀also฀in฀the฀intensive฀care฀setting฀of฀sedation฀in฀critically฀ ill฀patients.฀This฀is฀especially฀important฀in฀patients,฀such฀as฀those฀ with฀severe฀burns,฀in฀whom฀preserved฀renal฀concentrating฀ability฀ is฀ important฀ to฀ ensure฀ compensation฀ for฀ extrarenal฀ fuid฀ losses.฀ (Crit Care Med฀2016;฀44:e1246–e1250) Key Words:฀ burns;฀ nephrogenic฀ diabetes฀ insipidus;฀ polyuria;฀ sevofurane T here has been increasing interest in the use of sevoflu- rane for ICU sedation since the introduction in 2005 of the Anaesthetic Conserving Device (ACD, AnaConDa, Sedana Medical, Uppsala, Sweden) (1, 2). ACD use with sevo- flurane seems to be an effective alternative to midazolam or propofol sedation regimens, allowing for decreased wake-up and extubation times (3), but data on long-term safety with the device are currently lacking. Apart from the potential for inducing malignant hyperthermia and initial fears of nephro- toxicity, sevoflurane has not been associated with serious side effects and has enjoyed an excellent safety profile in anesthetic practice. In particular, renal injury has not been reported in the ICU setting although plasma inorganic fluoride concentra- tions exceeding the classic nephrotoxic threshold of 50 μmol/L initially determined for methoxyflurane have been described (3, 4). In this case report, we present a patient from our burn ICU in whom prolonged sevoflurane sedation was associated with the onset of partial nephrogenic diabetes insipidus (NDI). CASE PRESENTATION In January 2015, a healthy 34-year-old Caucasian man (79 kg and 180 cm) was admitted to our burns centre after jumping from the second floor of his burning apartment. There was no significant past medical or surgical history, and he did not take any regular medicines or illicit drugs and had no known allergies. At the scene of the incident, the emergency services intubated his trachea following administration of IV seda- tion. Beforehand, he was able to move all limbs spontane- ously and had a documented Glasgow Coma Score of 15/15. Clinical examination revealed that second- and third-degree burn wounds distributed over his torso and upper limbs, with a total body surface area of 52%. Escharotomies of both upper limbs were later performed in our emergency depart- ment. There were no signs of smoke inhalation, and arterial Copyright฀©฀2016฀by฀the฀Society฀of฀Critical฀Care฀Medicine฀and฀Wolters Kluwer฀Health,฀Inc.฀All฀Rights฀Reserved. DOI: 10.1097/CCM.0000000000001956 All฀authors:฀Burns฀Unit,฀Queen฀Astrid฀Military฀Hospital,฀Brussels,฀Belgium. The฀authors฀have฀disclosed฀that฀they฀do฀not฀have฀any฀potential฀conficts฀ of฀interest. For฀information฀regarding฀this฀article,฀E-mail:฀Olivier.Pantet@chuv.ch Partial Nephrogenic Diabetes Insipidus in a Burned Patient Receiving Sevoflurane Sedation With an Anesthetic Conserving Device—A Case Report Marie Muyldermans, MD; Serge Jennes, MD; Stuart Morrison, MD; Olivier Soete, MD; Pierre-Michel François, MD; Elkana Keersebilck, MD; Thomas Rose, MD; Olivier Pantet, MD