Electrolyte and Fluid Disturbances in Subarachnoid Hemorrhage and Traumatic Brain Injury
During the course of their acute illness patients with subarachnoid hemorrhage and severe traumatic brain injury often develop disturbances in their fluid balance and electrolyte homeostasis. These shifts are associated with worse outcome and increased morbidity.
The aim of this observational study is to systematically analyze the incidence, characteristics, potential diagnostic markers and predisposing factors of such disturbances. The investigators hypothesize that many disturbances cannot be classified with a standard diagnostic approach and that variable fluid management contributes to their pathophysiology.
Patients will be closely monitored clinically and the exact fluid and electrolyte balances will be recorded. Treatment decisions are within the bedside physicians responsibility. Baseline fluid management is standardised. No interventions are planned. The observation period equal the duration of ICU stay.
Traumatic Brain Injury
|Study Design:||Observational Model: Cohort
Time Perspective: Prospective
|Official Title:||Disturbances of the Sodium and Fluid Balance in Patients With Severe Traumatic Brain Injury and Non-traumatic Subarachnoid Hemorrhage. A Systematic Observational Study|
- Incidence of sodium-fluid disturbances [ Time Frame: 14 days ] [ Designated as safety issue: No ]
- Type of sodium abnormality [ Time Frame: 14 days ] [ Designated as safety issue: No ]
- Haemodynamic changes, 8hourly urine output, 8hourly fluid and sodium balance, changes in fluid management by treating doctors associated with sodium disturbances [ Time Frame: 14 days ] [ Designated as safety issue: No ]We measure all parameters for multivariate analysis to find common predictors for sodium and fluid balance disturbances in these patients
- Associated changes in natriuretic peptide levels [ Time Frame: 14 days ] [ Designated as safety issue: No ]
Biospecimen Retention: Samples With DNA
serum and urine samples
|Study Start Date:||January 2011|
|Study Completion Date:||January 2013|
|Primary Completion Date:||January 2013 (Final data collection date for primary outcome measure)|
Patients with non-traumatic subarachnoid hemorrhage
Patients with severe traumatic brain injury
Electrolyte disturbances and fluid shifts are common in patients with subarachnoid hemorrhage (SAH) or traumatic brain injury (TBI). They usually have a rapid onset with impact on morbidity (possibly mortality) and length of stay. So far the understanding of underlying pathophysiologies and the contribution of iatrogenic influences is not fully understood.
Only limited evidence and data on classification, management and outcome of patients exists.
To describe the incidence, characteristics and duration of sodium and fluid disturbances in patients with SAH or TBI.
To document exact fluid and electrolyte management To evaluate predisposing factors and potential predicting biomarkers such as natriuretic peptides, renin-aldosterone system.
Prospective systematic observational study with 50 patients in the SAH group and 50 patients in the TBI group.
8hourly clinical assessment, blood and urin samples. Defined trigger points for additional measurements.
Continuous fluid balance documentation Daily measurement of natriuretic peptides, aldosterone and renin
|Dep. of Intensive Care Medicine Bern University Hospital|
|Bern, Switzerland, 3010|
|Principal Investigator:||Jan Wiegand, MD||Dep. Intensive Care Medicine, University Hospitals Bern|
|Study Director:||Stephan Jakob, MD, PhD||Dep. Intensive Care Medicine, University Hospitals Bern|
|Study Chair:||Jukka Takala, MD PhD||Dep. Intensive Care Medicine, University Hospitals Bern|