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WithdrawnNCT01932255Updated May 13, 2015

CSF Leak Following Microvascular Decompression: the Benefit of Routine Postoperative Lumbar Tap

An observational study in Cranial Nerve Diseases, Facial Neuralgia and Trigeminal Neuralgia, sponsored by St. Olavs Hospital. Withdrawn. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2015-05-13.

Primary conditionTrigeminal NeuralgiaRegistry: Facial NeuralgiaReclassifiedWhy we changed it
Registry
Facial Neuralgia — the first condition term the registry derived for this study.
ClinicalTrials.gg
Trigeminal Neuralgia
Why
  1. The study's listed conditions name Trigeminal Neuralgia, a narrower term within Facial Neuralgia.
Confidence
High: the new condition is named in the study's own listed conditions. Of 351 hand-checked studies reclassified this way, 68% were exactly right and 84% in the right disease family; the registry's first term was right for 5% (measured 2026-10-21). How we classify →
Wrong?
Tell us the study's main condition →

Sponsored by St. Olavs Hospital · Observational

Why this study was withdrawn
inadequate data
Study type
Observational
Model
Case-control
Time perspective
Retrospective
Enrollment
0
Ages
18 Years and older
Sex
All
01

Study summary

Even at centers with very large experience, the risk of cerebrospinal fluid (CSF) leakage in surgery for microvascular decompression is reported up to 3%.

Prevention of leakage is important since meningitis may follow. Also, leakage usually means longer hospital stay and increased cost.

In case of detected leakage extra sutures may be applied, placement of a lumbar drain may be considered or a revision and improved closure may be attempted. With leakage in the subcutaneous tissue, but not through the skin, a local accumulation causing local symptoms may also occur. In addition to being burdensome and being associated with longer hospital stays with possible revision surgery, such complications are also very costly. The best way to reduce cost and burden, and to improve patient care, is to prevent CSF leakage.

The aim of this study is to determine if prophylactic lumbar tap is beneficial for prevention of cerebrospinal fluid leakage following microvascular decompression, by comparison of surgical approaches in 3 geographical areas in the Scandinavian health system.

Hypothesis: There is no difference in cerebrospinal fluid leakage between the group subject to prophylactic spinal tap versus the group without prophylactic spinal tap.

02

Conditions studied

  • Cranial Nerve Diseases
  • Facial Neuralgia
  • Trigeminal Neuralgia
  • Hemifacial Spasm

Keywords

  • microvascular decompression surgery
  • cerebrospinal fluid leakage
  • postoperative complications
03

In context

Trigeminal Neuralgia Reclassified

140 studies on the registry are indexed under Trigeminal Neuralgia; 44 are open to participants now.

Browse Trigeminal Neuralgia studies →

Lead sponsor

St. Olavs Hospital is the lead sponsor of 171 studies on the registry; 29 are open to participants now.

Compared within Trigeminal Neuralgia, this study's primary condition as ClinicalTrials.gg classifies it; the registry's first condition term is Facial Neuralgia. The counts are of registry records indexed under each term, refreshed daily. How we classify →

04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
No
Sampling method
Non-probability sample

Study population

The planned study is a retrospective review of medical charts in consecutive patients undergoing surgery for neurovascular conflict by microvascular decompression surgery. Patients will be identified from the operating protocols at the respective hospitals.

Inclusion criteria

  • microvascular decompression surgery for neurovascular conflict (hemifacial spasm, trigeminal neuralgia)
  • surgery between 1990 and 2013
  • Follow-up visit registered in medical charts > 30 days postoperatively (at either local hospital, treating neurologist or at neurosurgical clinic)

Exclusion criteria

Exclusion Criteria:

-

05

Study design

Observational model
Case-control
Time perspective
Retrospective
Enrollment
0 participants (actual)
Patient registry
No

Groups and cohorts

  • prophylactic spinal tap

    Microvascular decompression surgery approach at the Karolinska University Hospital, i.e. a small craniectomy (removal of bone without putting it back), and postoperatively serial prophylactic lumbar tap

    Procedure: prophylactic spinal tap

  • no prophylactic spinal tap

    Microvascular decompression surgery approach at St Olavs Hospital Trondheim University Hospital and the University Hospital of North Norway, i.e. not comprising a policy of preventing CSF leak by performing prophylactic lumbar taps or its equivalents

    Procedure: no prophylactic spinal tap

Interventions

  • Procedureprophylactic spinal tap
  • Procedureno prophylactic spinal tap
06

What researchers measure

Primary outcomes

  1. cerebrospinal fluid leakage

    Any leakage after 3rd postoperative day (since one hospital introduces iatrogenic leakage the first 3 days after surgery)

    Time frame: 30 days

Secondary outcomes

  1. overall complication risk

    Time frame: 30 days

  2. Specific complication risk

    risks associated with prophylactic treatment: meningitis, positional head-ache (need for epidural blood-patch)

    Time frame: 30 days

  3. days in hospital

    Time frame: 30 days

07

Study locations

No study locations are listed for this record.

08

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on May 13, 2015, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
09

Registry details

Key details

Study ID
NCT01932255
Lead sponsor
St. Olavs Hospital
Responsible party
Sponsor
First posted
Aug 30, 2013
Start date
Oct 2013
Primary completion
Jul 2014
Completion
Dec 2014
Last update
May 13, 2015

Study contacts

Asgeir S Jakola, MD PhD
study chair · St. Olavs Hospital

Oversight

Data monitoring committee
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is withdrawn, as verified in May 2015. You cannot join it, but the record below documents what was studied.

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