Axel Forsse1,2, Troels Halfeld Nielsen3,4, Simon Mølstrøm5, Jacob Hjelmborg6, Kasper Stokbro Nielsen7, Kevin Hebøll Nygaard3,4, Sibel Yilmaz3, Carl-Henrik Nordström3,4, Frantz Rom Poulsen3,4. 1. Department of Neurosurgery, Odense University Hospital, Sønder Boulevard 29, 5000, Odense, Denmark. aforsse@health.sdu.dk. 2. BRIDGE - Brain Research - Inter-Disciplinary Guided Excellence, Department of Clinical Research, University of Southern Denmark, Odense, Denmark. aforsse@health.sdu.dk. 3. Department of Neurosurgery, Odense University Hospital, Sønder Boulevard 29, 5000, Odense, Denmark. 4. BRIDGE - Brain Research - Inter-Disciplinary Guided Excellence, Department of Clinical Research, University of Southern Denmark, Odense, Denmark. 5. Department of Anesthesiology and Intensive Care, Odense University Hospital, Odense, Denmark. 6. Department of Biostatistics and Epidemiology, University of Southern Denmark, Odense, Denmark. 7. Department of Oral and Maxillofacial Surgery, Odense University Hospital, Odense, Denmark.
Abstract
BACKGROUND: Cerebral metabolic perturbations are common in aneurysmal subarachnoid hemorrhage (aSAH). Monitoring cerebral metabolism with intracerebral microdialysis (CMD) allows early detection of secondary injury and may guide decisions on neurocritical care interventions, affecting outcome. However, CMD is a regional measuring technique that is influenced by proximity to focal lesions. Continuous microdialysis of the cerebral venous drainage may provide information on global cerebral metabolism relevant for the care of aSAH patients. This observational study aimed to explore the feasibility of jugular bulb microdialysis (JBMD) in aSAH and describe the output characteristics in relation to conventional multimodal monitoring. METHODS: Patients with severe aSAH were included at admission or after in-house deterioration when local clinical guidelines prompted extended multimodal monitoring. Non-dominant frontal CMD, intracranial pressure (ICP), partial brain tissue oxygenation pressure (PbtO2), and cerebral perfusion pressure (CPP) were recorded every hour. The dominant jugular vein was accessed by retrograde insertion of a microdialysis catheter with the tip placed in the jugular bulb under ultrasound guidance. Glucose, lactate, pyruvate, lactate/pyruvate ratio, glycerol, and glutamate were studied for correlation to intracranial measurements. Modified Rankin scale was assessed at 6 months. RESULTS: Twelve adult aSAH patients were monitored during a mean 4.2 ± 2.6 days yielding 22,041 data points for analysis. No complications related to JBMD were observed. Moderate or strong significant monotonic CMD-to-JBMD correlations were observed most often for glucose (7 patients), followed by lactate (5 patients), and pyruvate, glycerol, and glutamate (3 patients). Moderate correlation for lactate/pyruvate ratio was only seen in one patient. Analysis of critical periods defined by ICP > 20, CPP < 65, or PbtO2 < 15 revealed a tendency toward stronger CMD-to-JBMD associations in patients with many or long critical periods. Possible time lags between CMD and JBMD measurements were only identified in 6 out of 60 patient variables. With the exception of pyruvate, a dichotomized outcome was associated with similar metabolite patterns in JBMD and CMD. A nonsignificant tendency toward greater differences between outcome groups was seen in JBMD. CONCLUSIONS: Continuous microdialysis monitoring of the cerebral drainage in the jugular bulb is feasible and safe. JBMD-to-CMD correlation is influenced by the type of metabolite measured, with glucose and lactate displaying the strongest associations. JBMD lactate correlated more often than CMD lactate to CPP, implying utility for detection of global cerebral metabolic perturbations. Studies comparing JBMD to other global measures of cerebral metabolism, e.g., PET CT or Xenon CT, are warranted.
BACKGROUND: Cerebral metabolic perturbations are common in aneurysmal subarachnoid hemorrhage (aSAH). Monitoring cerebral metabolism with intracerebral microdialysis (CMD) allows early detection of secondary injury and may guide decisions on neurocritical care interventions, affecting outcome. However, CMD is a regional measuring technique that is influenced by proximity to focal lesions. Continuous microdialysis of the cerebral venous drainage may provide information on global cerebral metabolism relevant for the care of aSAHpatients. This observational study aimed to explore the feasibility of jugular bulb microdialysis (JBMD) in aSAH and describe the output characteristics in relation to conventional multimodal monitoring. METHODS:Patients with severe aSAH were included at admission or after in-house deterioration when local clinical guidelines prompted extended multimodal monitoring. Non-dominant frontal CMD, intracranial pressure (ICP), partial brain tissue oxygenation pressure (PbtO2), and cerebral perfusion pressure (CPP) were recorded every hour. The dominant jugular vein was accessed by retrograde insertion of a microdialysis catheter with the tip placed in the jugular bulb under ultrasound guidance. Glucose, lactate, pyruvate, lactate/pyruvate ratio, glycerol, and glutamate were studied for correlation to intracranial measurements. Modified Rankin scale was assessed at 6 months. RESULTS: Twelve adult aSAHpatients were monitored during a mean 4.2 ± 2.6 days yielding 22,041 data points for analysis. No complications related to JBMD were observed. Moderate or strong significant monotonic CMD-to-JBMD correlations were observed most often for glucose (7 patients), followed by lactate (5 patients), and pyruvate, glycerol, and glutamate (3 patients). Moderate correlation for lactate/pyruvate ratio was only seen in one patient. Analysis of critical periods defined by ICP > 20, CPP < 65, or PbtO2 < 15 revealed a tendency toward stronger CMD-to-JBMD associations in patients with many or long critical periods. Possible time lags between CMD and JBMD measurements were only identified in 6 out of 60 patient variables. With the exception of pyruvate, a dichotomized outcome was associated with similar metabolite patterns in JBMD and CMD. A nonsignificant tendency toward greater differences between outcome groups was seen in JBMD. CONCLUSIONS: Continuous microdialysis monitoring of the cerebral drainage in the jugular bulb is feasible and safe. JBMD-to-CMD correlation is influenced by the type of metabolite measured, with glucose and lactate displaying the strongest associations. JBMD lactate correlated more often than CMDlactate to CPP, implying utility for detection of global cerebral metabolic perturbations. Studies comparing JBMD to other global measures of cerebral metabolism, e.g., PET CT or Xenon CT, are warranted.
Authors: Peter J Hutchinson; Ibrahim Jalloh; Adel Helmy; Keri L H Carpenter; Elham Rostami; Bo-Michael Bellander; Martyn G Boutelle; Jeff W Chen; Jan Claassen; Claire Dahyot-Fizelier; Per Enblad; Clare N Gallagher; Raimund Helbok; Lars Hillered; Peter D Le Roux; Sandra Magnoni; Halinder S Mangat; David K Menon; Carl-Henrik Nordström; Kristine H O'Phelan; Mauro Oddo; Jon Perez Barcena; Claudia Robertson; Elisabeth Ronne-Engström; Juan Sahuquillo; Martin Smith; Nino Stocchetti; Antonio Belli; T Adrian Carpenter; Jonathan P Coles; Marek Czosnyka; Nil Dizdar; J Clay Goodman; Arun K Gupta; Troels H Nielsen; Niklas Marklund; Ambroise Montcriol; Mark T O'Connell; Maria A Poca; Asita Sarrafzadeh; Richard J Shannon; Jane Skjøth-Rasmussen; Peter Smielewski; John F Stover; Ivan Timofeev; Paul Vespa; Elizabeth Zavala; Urban Ungerstedt Journal: Intensive Care Med Date: 2015-09 Impact factor: 17.440