Endovascular trapping of direct carotid-cavernous fistula

Application of the Willis Covered Stent in the Treatment of Carotid-Cavernous Fistula: A Single-Center Experience

BACKGROUND

The purpose of the present study was to describe our single-institutional experience of treating direct carotid-cavernous fistulas (DCCFs) with Willis covered stents (WCSs).

METHODS

Of a total of 31 DCCFs, 10 were treated with WCSs (Microport, Shanghai, China) at West China Hospital from January 2015 to December 2016. The indications for treatment, perioperative findings, and postoperative and follow-up results were collected and analyzed.

RESULTS

All 10 patients had successful deployment of WCSs. Complete exclusion of the fistula was achieved in 6 patients immediately after deployment of 1 stent. Endoleak was observed in 4 patients (patients 2, 4, 5, and 9). Thus, repeat dilation of the stent with greater pressure was performed, which resolved the endoleak in 2 patients (patients 2 and 9). The endoleak of the other 2 patients persisted after repeat dilation of the balloon. Hence, a second stent was deployed in these 2 patients (patients 4 and 5), which eliminated the endoleak in patient 4. However, patient 5 continued to have a minimal endoleak. Nine patients had fistulas successfully occluded by WCSs during the follow-up period. One patient experienced recurrence of a DCCF at the 10-day follow-up point. We chose coil embolization to address this DCCF. No stenosis of the internal carotid artery or DCCF recurrence, except that in the abovementioned patient, was observed.

CONCLUSIONS

WCS was proved to be an alternative treatment method for complex DCCFs through reconstruction and preservation of the internal carotid artery. Our study also confirmed the safety, efficacy, and midterm durability of WCSs for complex DCCFs without any serious delayed complications.

Vasospasm in the setting of traumatic bilateral carotid-cavernous fistulas and its effect on treatment

Background:

Direct, Type A, cavernous-carotid fistulas (CCFs) are predominantly caused by head trauma, especially when basilar skull fractures are present. Transarterial endovascular treatment of direct CCFs is the preferred method of treatment. Bilateral CCFs are estimated to be present in 1–2% of the cases. The treatment of bilateral CCFs is difficult often requiring a combination of endovascular and open surgical approaches.

Case Description:

We present a case of traumatic bilateral CCFs presenting with vasospasm of the anterior circulation seen on the initial angiogram on day 1 and our treatment paradigm.

Conclusion:

This case illustrates the challenges in managing bilateral CCFs as well as the changes in collateral circulation because of cerebral vasospasm which affected our treatment paradigm.

Reconstruction of the Internal Carotid Artery After Treatment of Complex Traumatic Direct Carotid-Cavernous Fistulas With the Willis Covered Stent

BACKGROUND:

Endovascular treatment of complex traumatic direct carotid-cavernous fistulas (TDCCFs) is a challenge.

OBJECTIVE:

To evaluate the long-term efficacy of the Willis covered stent in endovascular treatment of complex TDCCFs, focusing on reconstruction and preservation of the internal carotid artery.

METHODS:

During the past 8 years, 25 patients with 27 TDCCFs who previously had unsuccessful treatment of fistulas with detachable balloons received endovascular treatment with Willis covered stents. The efficacy, complications, in-stent stenosis, angiographic, and clinical follow-up results were evaluated retrospectively between 6 and 88 months (mean, 43.8 months) after the stent placement.

RESULTS:

The technical success rate of stenting placement was 100%. Forty-four Willis covered stents were implanted into the target artery of 27 TDCCFs. Complete exclusion was achieved in 16 patients with 17 TDCCFs immediately after the stent placement, with transient endoleaks in 10 TDCCFs. Redilation was performed in 6 TDCCFs, and additional stents were implanted in the other 4 TDCCFs for endoleak exclusion. The initial angiographic results showed complete exclusion of fistulas with preservation of the internal carotid artery in 24 patients with 26 TDCCFs. One patient in whom complete occlusion initially was achieved subsequently experienced a delayed endoleak, which required placement of an additional stent. The angiographic follow-up results (mean, 30.3 months) demonstrated complete exclusion in all 27 TDCCFs, with patency of internal carotid artery in 23 patients. The clinical follow-up demonstrated a full recovery in 23 patients and improvement in 2 patients.

CONCLUSION:

The use of Willis covered stents was confirmed to be effective, safe, and a curative approach for endovascular treatment of complex TDCCFs and internal carotid artery reconstruction.

Endovascular treatment of carotid cavernous sinus fistula: A systematic review

Carotid cavernous sinus fistulas are abnormal communications between the carotid system and the cavernous sinus. Several classification schemes have described carotid cavernous sinus fistulas according to etiology, hemodynamic features, or the angiographic arterial architecture. Increased pressure within the cavernous sinus appears to be the main factor in pathophysiology. The clinical features are related to size, exact location, and duration of the fistula, adequacy and route of venous drainage and the presence of arterial/venous collaterals. Noninvasive imaging (computed tomography, magnetic resonance, computed tomography angiography, magnetic resonance angiography, Doppler) is often used in the initial work-up of a possible carotid cavernous sinus fistulas. Cerebral angiography is the gold standard for the definitive diagnosis, classification, and planning of treatment for these lesions. The endovascular approach has evolved as the mainstay therapy for definitive treatment in situations including clinical emergencies. Conservative treatment, surgery and radiosurgery constitute other management options for these lesions.