Dynamic optic nerve sheath diameter responses to short-term hyperventilation measured with sonography in patients under general anesthesia / 대한마취과학회지
Korean Journal of Anesthesiology
;
: 240-245, 2014.
Article
in English
| WPRIM
| ID: wpr-136238
ABSTRACT
BACKGROUND:
Rapid evaluation and management of intracranial pressure (ICP) can help to early detection of increased ICP and improve postoperative outcomes in neurocritically-ill patients. Sonographic measurement of optic nerve sheath diameter (ONSD) is a non-invasive method of evaluating increased intracranial pressure at the bedside. In the present study, we hypothesized that sonographic ONSD, as a surrogate of ICP change, can be dynamically changed in response to carbon dioxide change using short-term hyperventilation.METHODS:
Fourteen patients were enrolled. During general anesthesia, end-tidal carbon dioxide concentration (ETCO2) was decreased from 40 mmHg to 30 mmHg within 10 minutes. ONSD, which was monitored continuously in the single sonographic plane, was repeatedly measured at 1 and 5 minutes with ETCO2 40 mmHg (time-point 1 and 2) and measured again at 1 and 5 minutes with ETCO2 30 mmHg (time-point 3 and 4).RESULTS:
The mean +/- standard deviation of ONSD sequentially measured at four time-points were 5.0 +/- 0.5, 5.0 +/- 0.4, 3.8 +/- 0.6, and 4.0 +/- 0.4 mm, respectively. ONSD was significantly decreased at time-point 3 and 4, compared with 1 and 2 (P < 0.001).CONCLUSIONS:
The ONSD was rapidly changed in response to ETCO2. This finding may support that ONSD may be beneficial to close ICP monitoring in response to CO2 change.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Optic Nerve
/
Carbon Dioxide
/
Intracranial Pressure
/
Ultrasonography
/
Hyperventilation
/
Anesthesia, General
Type of study:
Diagnostic study
/
Screening study
Limits:
Humans
Language:
English
Journal:
Korean Journal of Anesthesiology
Year:
2014
Type:
Article
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