Acute Venous Outflow Obstruction After Coil Embolization of Giant Cavernous Carotid Aneurysm: 2-Dimensional Operative Video
Bibliographic record
Abstract
BACKGROUND AND IMPORTANCE: Endovascular treatment of giant carotid cavernous aneurysms (GCCAs) may be associated with complications including rapid intrasaccular thrombosis, embolic ischemic stroke, and caroticocavernous fistula. CLINICAL PRESENTATION: A female in her 6th decade presented with a chronic, right partial abducens nerve palsy. Magnetic resononance angiography demonstrated a 25-mm right GCCA causing mass effect on the right cavernous sinus. Coil embolization of the aneurysm and parent vessel was performed after passing a balloon test occlusion. Final angiography demonstrated complete embolization of the aneurysm, however, absent ipsilateral cavernous sinus drainage, which was present previously. Intraprocedurally, the patient had ipsilateral proptosis and chemosis. Once extubated, urgent ophthalmology review documented preserved and symmetrical visual acuity with both pupils reactive to light. Intraocular pressure was 19-mm and 11-mm Hg in the right and left eye, respectively. The right eye had -2 abduction with otherwise intact extraocular movements. Acute management included a total of 16-mg IV dexamethasone on day 1, followed by a course of oral steroids and prophylactic low molecular weight heparin. Postprocedure computed tomography of the head demonstrated periorbital soft tissue edema and dilatation of the right superior ophthalmic vein, which peaked at 6 hours postprocedure. The patients' ocular findings and visual disturbances subsided within 36 hours postprocedure. The chronic partial abducens nerve palsy remained. CONCLUSION: Acute proptosis, chemosis, and visual disturbances may occur from mass effect on the cavernous sinus with venous outflow obstruction after GCCA embolization. This is thought to be secondary to increased mass effect from intrasaccular thrombosis and the large coil mass.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.001 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.002 | 0.001 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.002 | 0.001 |
| Insufficient payload (model declined to judge) | 0.002 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".