Related Experiment Video
Updated: Sep 29, 2025
Microvascular Decompression: Salient Surgical Principles and Technical Nuances
Published on: July 5, 2011
Case Series in the Utility of Invasive Blood Pressure Monitoring in Microvascular Decompression
Risheng Xu1, Sumil K Nair1, Josh Materi1
1Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA.
Background:
The utility of arterial lines in microvascular decompression (MVD) is not well described.
Objective:
To examine the safety and costs of arterial lines compared with noninvasive blood pressure (NIBP) monitoring in MVDs.
Methods:
We retrospectively reviewed patients undergoing MVD from 2012 to 2020. Patients were grouped by procedure date from 2012 to 2014 and 2015 to 2020, reflecting our institution's decreasing trend in arterial line placement around 2014 to 2015. Patient features, intraoperative characteristics, and postoperative complications were collected for all cases. Statistical differences were evaluated using chi-squared analyses and t-tests.
Results:
Eight hundred fifty-eight patients underwent MVDs, with 204 between 2012 and 2014 and 654 between 2015 and 2020. Over time, the frequency of arterial line placement decreased from 64.2% to 30.1%, P < .001. Arterial lines involved 11 additional minutes of preincision time, P < .001. Patients with arterial lines required both increased doses and costs of vasoactive medications intraoperatively. Patients receiving arterial lines demonstrated no significant differences in complications compared with patients with NIBP monitoring. On average, patients with arterial lines incurred $802 increased costs per case compared with NIBP monitoring.
Conclusion:
NIBP monitoring in MVDs provides neurologically and hemodynamically safe outcomes compared with invasive blood pressure monitoring. For patients without significant cardiopulmonary risk factors, NIBP monitoring may be a cost-effective alternative in MVDs.
Insights
Arterial lines in microvascular decompression (MVD) surgery are not associated with improved patient outcomes but increase costs and procedure time. Noninvasive blood pressure (NIBP) monitoring is a safe and cost-effective alternative for most MVD patients.
Area of Science:
- Neurosurgery
- Anesthesiology
- Health Economics
Background:
- The role of arterial lines in microvascular decompression (MVD) surgery remains unclear.
- Assessing the safety and economic impact of arterial lines versus noninvasive blood pressure (NIBP) monitoring in MVD is crucial.
Purpose of the Study:
- To compare the safety and costs of arterial lines with NIBP monitoring during MVD procedures.
- To evaluate the impact of arterial line use on intraoperative resource utilization and patient outcomes.
Main Methods:
- Retrospective review of 858 MVD patients from 2012-2020, categorized into early (2012-2014) and late (2015-2020) periods.
- Analysis of patient demographics, intraoperative data, and postoperative complications.
- Statistical comparison using chi-squared tests and t-tests to evaluate differences between arterial line and NIBP monitoring groups.
Main Results:
- Arterial line placement decreased from 64.2% to 30.1% over the study period (P < .001).
- Arterial lines added 11 minutes to preincision time (P < .001) and increased intraoperative vasoactive medication costs.
- No significant difference in postoperative complications was observed between arterial line and NIBP monitoring groups.
- Arterial line use incurred an average additional cost of $802 per case.
Conclusions:
- Noninvasive blood pressure monitoring is a safe and effective alternative to invasive arterial lines in MVD.
- NIBP monitoring offers a cost-effective approach for MVD patients, particularly those without significant cardiopulmonary risk factors.
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