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Revision surgery following CSF shunt insertion: how often could it be avoided?
Stefanie Kaestner1,2, Manuela Poetschke3, Uwe Kehler4
1Department of Neurosurgery, Klinikum Kassel, Moenchberg Str. 41-43, 34125, Kassel, Germany. Stefaniekaestner@aol.com.
Insights
Rates of avoidable cerebrospinal fluid (CSF) shunt revision surgery are high, with many occurring within 3 months of the initial surgery. This highlights a significant burden that may be preventable.
Area of Science:
- Neurosurgery
- Medical Economics
Background:
- Cerebrospinal fluid (CSF) shunt revision surgery imposes a substantial social and economic burden.
- Limited research exists on the avoidability of shunt revisions, and prior data primarily focus on pediatric populations.
Purpose of the Study:
- To classify and quantify avoidable versus unavoidable CSF shunt revisions in a mixed adult and pediatric cohort.
- To identify factors associated with avoidable shunt revisions.
Main Methods:
- Retrospective review of a prospectively maintained single-center database (2007-2016).
- Inclusion of all initial shunt implantations and subsequent revisions with at least 1-year follow-up.
- Classification of revision surgeries as avoidable or unavoidable by a panel of five expert neurosurgeons.
Main Results:
- Out of 210 revision surgeries, 96 (45.7%) were deemed avoidable and 114 (54.3%) unavoidable.
- Avoidable revisions occurred significantly earlier (mean 112 days) compared to unavoidable ones (mean 448 days).
- Surgeon experience correlated with revision rates, yet 12.5% of revisions were avoidable even among the most experienced surgeons.
Conclusions:
- A high percentage of CSF shunt revision surgeries are avoidable, even when performed by experienced surgeons.
- Avoidable revisions predominantly occur within the first three months post-index surgery, indicating a critical early window for intervention.
Background:
Cerebrospinal fluid (CSF) shunt revision surgery represents a huge social and economic burden. Few studies, however, have evaluated shunt revision surgeries in the context of their avoidability, and existing data are from paediatric populations. Using ratings from an expert panel, we classified avoidable and unavoidable shunt revisions in a mixed cohort of CSF-shunt patients.
Methods:
In a retrospective review of a prospectively maintained, single-centre database, we identified all shunt systems implanted for the first time over a 10-year period (2007-2016) and all subsequent revision surgeries with a follow-up of at least 1 year. A panel of five expert shunt surgeons classified each revision surgery as avoidable or unavoidable. Rates of each were calculated and correlated with clinical data.
Results:
Of 210 revision surgeries (314 patients, mean age, 49.9 years; mean follow-up, 4.2 years), the panel judged 114 as unavoidable (54.3%) and 96 (45.7%) as avoidable. Level of surgeon education correlated with these rates, but even in the most experienced hands, 12.5% of revisions were classified as avoidable. Avoidable revisions occurred significantly earlier than unavoidable interventions (mean; 112 and 448 days, respectively) after the index surgery.
Conclusion:
Rates of avoidable shunt revision surgery are alarmingly high, even in experienced hands. Avoidable revisions occur significantly earlier, predominantly within the first 3 months after the index surgery.
