Abstract
Background
Perihematomal edema (PHE) can worsen patient outcomes after spontaneous intracerebral hemorrhage (ICH). Minimally invasive surgery (MIS) in combination with thrombolytic removal of hematoma has been proven to be a promising treatment strategy. However, preclinical studies have suggested that intraclot thrombolysis may exacerbate PHE after ICH. Herein, we investigated the effects of MIS and urokinase on PHE.
Methods
ICH patients were retrospectively identified from our institutional ICH database. Computerized volumetric analysis was applied to assess changes in both ICH and PHE volumes using computed tomographic (CT) scans of T1 (pre-MIS) and T2 (post-MIS) time points. Relative PHE (rPHE) was calculated as a ratio of PHE and T1 ICH volume.
Results
Data from 60 MIS plus urokinase (MIS + U), 20 MIS aspiration only (MO), and 30 control patients were analyzed. The ICH volume, PHE volume and rPHE on T2 CT in both MIS + U and MO groups significantly decreased as compared with the control group (ICH volume, 13.7 ± 5.7 ml, 17.0 ± 10.5 ml vs. 30.5 ± 10.3 ml, P < 0.01; PHE volume, 36.5 ± 18.9 ml, 32.2 ± 17.5 ml vs. 45.4 ± 16.0 ml, P < 0.01; rPHE, 0.9 ± 0.4, 0.8 ± 0.4 vs.1.4 ± 0.5, P < 0.01). Between the MIS + U and MO groups, the ICH volume, PHE volume and rPHE at T2 trended towards similarity, but was not significant (P = 0.09, P = 0.40, P = 0.43). Furthermore, we found a significant correlation between the percent of ICH removal and PHE reduction (r = 0.59, P < 0.01). There was no correlation between the cumulative dose of urokinase and either T2 PHE volume (r = 0.19; P = 0.16) or T2 rPHE (r = -0.12; P = 0.37).
Conclusions
Hematoma evacuation using MIS leads to a significant reduction in PHE. Furthermore, the use of urokinase does not exacerbate PHE, making its hypothesized proedematous effects unlikely when the thrombolytic is administered directly into the clot.
Abbreviations
- ICH:
-
Intracerebral hemorrhage
- CT:
-
Computed tomography
- PHE:
-
Perihematomal edema
- rPHE:
-
Relative perihematomal edema
- MIS:
-
Minimally invasive surgery
- IVH:
-
Intraventricular hemorrhage
- MO:
-
Minimally invasive surgery aspiration only
- MIS + U:
-
Minimally invasive surgery aspiration plus urokinase
- GCS:
-
Glasgow coma scale
- mRS:
-
Modified Rankin scale
- rt-PA:
-
Recombinant tissue-type plasminogen activator
- NICU:
-
Neurological intensive care unit
- CNS:
-
Central nervous system
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Acknowledgments
Research was supported by grants from the National Natural Science Foundation of China (No.81171089 and No. 30770751). Research was also supported by grants from the Key Clinical Program of the Ministry of Health of China (2010) and the Future Program of New Technology and New Business in Tongji Hospital (2012).
The authors would like to thank Dr. Austin Cape and Dr. Laura Darnieder for their careful reading and feedback in the preparation and revision of this manuscript.
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Lian, L., Xu, F., Hu, Q. et al. No exacerbation of perihematomal edema with intraclot urokinase in patients with spontaneous intracerebral hemorrhage. Acta Neurochir 156, 1735–1744 (2014). https://doi.org/10.1007/s00701-014-2130-9
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DOI: https://doi.org/10.1007/s00701-014-2130-9