Mineralocorticoid deficiency in hemorrhagic shock.
BACKGROUND
In the critically ill, mineralocorticoid deficiency (MD) is associated with greater disease severity, the development of acute renal insufficiency, and increased mortality. We hypothesized that severely injured trauma patients presenting with hemorrhagic shock would demonstrate a high degree of MD. We also hypothesized that MD in these patients would be associated with increased length of stay, hypotension, fluid requirements, and acute kidney injury (AKI).


METHODS
Thirty-two trauma patients in hemorrhagic shock on admission to the trauma bay (SBP <90 mm Hg × 2) were enrolled. Blood samples were obtained on ICU admission and 8, 16, 24, and 48 hours later. Plasma aldosterone (PA) and renin (PR) were assayed by radioimmunoassay. MD was defined as a ratio of PA/PR ≤2. Demographic data, injury severity score, ICU and hospital length of stay, fluid requirements, mean arterial pressure, serum sodium, hypotension, and risk for AKI were compared for patients with and without MD.


RESULTS
At ICU admission, 48% of patients met criteria for MD. Patients with MD were significantly more likely to experience hypotension (MAP ≤60 mm Hg) during the study period. MD patients required significantly more units of blood in 48 h than non-MD patients (13 [7-22] versus 5 [2-7], P = 0.015) and had increased crystalloid requirements (18L [14-23] versus 9L [6-10], P < 0.001). MD patients were at higher risk for AKI according to RIFLE and AKIN criteria.


CONCLUSIONS
MD is a common entity in trauma patients presenting in hemorrhagic shock. Patients with MD required a more aggressive resuscitative effort, were more likely to experience hypotension, and had a higher risk of AKI than non-MD patients. Future studies are needed to fully understand the impact of MD following trauma and the potential role for hormonal replacement therapy.
Penn State Hershey College of Medicine, Hershey, Pennsylvania, USA.
Nikolai S
NS
Tolstoy
Majid
M
Aized
Morgan P
MP
McMonagle
Daniel N
DN
Holena
Jose L
JL
Pascual
Seema S
SS
Sonnad
Carrie A
CA
Sims
D058186:Acute Kidney Injury / Q000209:etiology; D000328:Adult; D000077324:Crystalloid Solutions; D005260:Female; D006801:Humans; D007022:Hypotension / Q000209:etiology; D007552:Isotonic Solutions; D008297:Male; D008875:Middle Aged; D008901:Mineralocorticoids / Q000172:deficiency*; D012771:Shock, Hemorrhagic / Q000378:metabolism*; D014947:Wounds and Injuries / Q000378:metabolism
D000077324:Crystalloid Solutions; D007552:Isotonic Solutions; D008901:Mineralocorticoids