PubMed Health⌕ Search

Biomedical subjects

A Boulin

Publications and source records attributed to A Boulin.

At least 19 recordsLinked to original sources
PubMed2003

[Sphenoid bone: surgical techniques].

Many operative approaches to the sphenoid are possible. This is due to the anatomical characteristics of this bony structure, close to the facial cavities, covered by a meningeal lining and containing many vascular and nervous components. The choice of operative approach is guided by careful review of imaging data as well as limitations and risks of each approach. Sometimes, combined approaches in one or two stages are necessary. Only an adequate knowledge of each approach can allow the best surgical choice and limit the complications.

Craniotomy↗
PubMed2002

Thromboembolic events after endovascular treatment of unruptured intracranial aneurysms in two patients with antiphospholipid-antibody syndrome.

Antiphospholipid antibodies (APAs) are circulating immunoglobulins associated with a hypercoagulable state. The antiphospholipid syndrome combines APAs and clinical manifestations, including arterial or venous thromboses and/or recurrent spontaneous fetal loss. The main risk incurred by endovascular treatment of intracranial aneurysms is the occurrence of thromboembolic events. We report two cases of patients with antiphospholipid syndrome who developed thromboembolic complications after the endovascular treatment of unruptured intracranial aneurysms.

Adult↗
PubMed2002

[Imaging of skull base tumors in adults].

The skull base is divided into three parts: anterior, central and posterior. Numerous foramina are located in the skull base and transmit important neurovascular structures. Numerous types of tumor can be observed at the skull base. They are classified as anterior, central and posterior skull base tumors. They are also divided into three groups according to their origin: tumors arising from the skull base itself, intracranial tumors and extracranial tumors invading the skull base. Imaging is very important for diagnosis, treatment and follow-up of patients with skull base tumors. Magnetic resonance imaging is the most useful modality as it visualizes the lesion on different planes and permits the planning of therapy. Computed tomography depicts the osseous lesions more precisely and may be necessary before surgery. Catheter angiography is now in most cases replaced by magnetic resonance angiography. Interventional neuroradiology is necessary if the lesion is highly vascularized or if a vessel is encased in the tumor.

Adult↗
PubMed2001

Neuroimaging features of spontaneous intracranial hypotension.

We reviewed the cranial MRI and radionuclide cisternograms of four adults with postural headache indicating spontaneous intracranial hypotension (SIH). All four underwent clinical and radiological follow-up. MRI showed diffuse, thin meningeal enhancement; bilateral subdural fluid collections; and morphological abnormalities secondary to "sagging" of the brain. Radionuclide cisternography revealed direct or indirect signs of leakage of cerebrospinal fluid (CSF) along the spinal axis, and the symptoms resolved after the leak treated by epidural injection of blood at a level indicated by the cisternogram. The diffuse meningeal enhancement decreased but persisted on follow-up MRI, although the patients were asymptomatic. All morphologic abnormalities resolved during 3-5 months follow-up.

Adult↗
PubMed2001

Follow-up of intracranial aneurysms treated with detachable coils: comparison of gadolinium-enhanced 3D time-of-flight MR angiography and digital subtraction angiography.

PURPOSE: To compare three-dimensional (3D) time-of-flight magnetic resonance (MR) angiography with digital subtraction angiography (DSA) in the follow-up of intracranial aneurysms treated with selective endovascular placement of detachable coils. MATERIALS AND METHODS: Sixty-eight consecutive patients with intracranial aneurysms were included in the prospective study. The goal was to evaluate 3D time-of-flight MR angiography versus DSA for the detection of a residual aneurysm neck or residual flow inside the coil mesh. RESULTS: Eighty-one MR angiographic and 83 DSA examinations were performed; 15 patients were examined with both modalities twice. MR angiography was not possible in two patients. In another patient, the quality of MR angiography was not sufficient to assess the treated aneurysm. In 72 of the remaining 80 MR angiographic and DSA examinations, there was good correlation between the two modalities. In 54 cases, neither image type showed remnants or recurrence, but in 18, both showed residual aneurysm. In eight cases, the MR angiographic and DSA results differed. In one of these cases, MR angiography depicted residual aneurysm but DSA depicted an arterial loop. In seven cases, a small (<3-mm) remnant was not detected at MR angiography. CONCLUSION: Because very small aneurysm remnants or recurrences probably are not clinically important, MR angiography is an option for following up intracranial aneurysms treated with detachable coils and may partly replace DSA.

Adult↗
PubMed1999

Postoperative aneurysm remnants: endovascular treatment as an alternative to further surgery.

Because further surgery on postoperative aneurysm remnants can be difficult and lead to significant morbidity and mortality, endovascular treatment, using controlled detachable coils, was performed in three patients with such remnants. The endovascular approach was technically more difficult in these cases than in previously untreated patients. In one case, the "remodelling" technique was necessary. Given the successful outcome in these patients, endovascular treatment can be proposed as an alternative to another operation, when further surgery appears too risky or is refused by the patient.

Adult↗
PubMed1999

Giant-cell tumour involving the cranial vault: imaging and treatment.

A giant-cell tumour involving the cranial vault was diagnosed in a 37-year-old man who presented with a large swelling at the vertex. The role of imaging in the diagnosis and treatment of this tumour is described. On CT and MRI the appearances were nonspecific and the diagnosis was established by histological examination after removal of the tumour. A preoperative angiogram showed a tumour blush and before surgery, embolisation was performed via the percutaneous and transarterial routes.

Adult↗
PubMed1999

Percutaneous biopsy of the thoracic and lumbar spine: transpedicular approach under fluoroscopic guidance.

Eighteen patients with vertebral lesions located in the thoracic or lumbar spine underwent percutaneous biopsy performed via a transpedicular approach under fluoroscopic guidance. This technique led to an accurate diagnosis in 16 cases (89%). No complications were encountered. For percutaneous lumbar and thoracic vertebral biopsy, the transpedicular approach is a safe and accurate alternative to the posterolateral approach.

Adult↗
PubMed1998

Combined neurosurgical and neuroradiological treatment of a complex superior sagittal sinus dural fistula: technical note.

OBJECTIVE AND IMPORTANCE: Dural arteriovenous fistulas of the superior sagittal sinus (SSS) account for 8% of intracranial dural fistulas. Their association with a thrombosis of the posterior part of the SSS is rare. In such cases, the usual neurosurgical and endovascular approaches cannot provide a good technical solution for treatment of the lesion, and a combined neurosurgical and neuroradiological approach is therefore needed. CLINICAL PRESENTATION: A 68-year-old man presented with rapidly evolving dementia. Cerebral angiography revealed a dural arteriovenous fistula of the SSS associated with thrombosis of the posterior part of the SSS. Various endovascular and neurosurgical approaches failed to cure the fistula. INTERVENTION: A burr hole was drilled in the frontal region, in the neurosurgical room. The patient was then transferred to the angiographic room, and the SSS was occluded using free spirals. CONCLUSION: This procedure led to a complete anatomic cure of the fistula, and a slow clinical improvement was observed.

Aged↗
PubMed1998

Local intraarterial fibrinolysis of thromboemboli occurring during endovascular treatment of intracerebral aneurysm: a comparison of anatomic results and clinical outcome.

PURPOSE: We describe our therapeutic strategy and correlate the anatomic results and clinical outcomes in patients who received immediate fibrinolytic therapy for thromboembolic complications occurring during endovascular treatment of an intracerebral aneurysm. METHODS: The medical records and angiographic examinations of 19 patients were reviewed. All endovascular procedures were performed with the patients under general anesthesia and fully heparinized. Thirteen patients received an intravenous bolus injection of aspirin. Thromboemboli occurred during catheterization or insertion of embolic material (Guglielmi detachable coils or mechanical detachable spirals) or in the first hours after the intervention. Clot distribution was within the MCA territory in 14 patients, the ACA in three patients, and the basilar trunk in two patients. A continuous intraarterial injection of urokinase was administered immediately, either superselectively distal to the thrombus or selectively within or closely proximal to the thrombus. In nine cases, chemical lysis was combined with mechanical clot fragmentation. Initial anatomic recanalization as well as clinical outcome at 3 months were evaluated. RESULTS: Ten patients showed complete recanalization and nine patients showed partial recanalization. Fourteen patients had a good clinical recovery. One patient was moderately disabled and two were severely disabled according to their scores on the Glasgow outcome scale. Two patients died, one as a consequence of the preexisting subarachnoid hemorrhage and the other because of a large intracerebral hematoma that developed after fibrinolysis. Of the 14 patients with a good clinical outcome, nine exhibited complete recanalization and five partial recanalization. CONCLUSION: Pharmacological thrombolysis seems to be a safe and efficient therapy that facilitates the natural fibrinolytic process, increasing the rate of recanalization in thromboembolic events. Clot fragmentation and superselective drug infusion appear to improve the rate of recanalization. Complete recanalization increases the chance of a better clinical outcome; however, clinical outcome does not always correspond to recanalization and vice versa.

Adult↗
PubMed1997

The endovascular approach in the management of patients with multiple intracranial aneurysms.

To investigate the role of endovascular treatment we performed a retrospective study of our patients with multiple intracranial aneurysms seen in our institution between October 1992 and March 1995. This period was chosen to study a homogeneous group of patients since the appearance of controlled detachable coils, and to obtain the largest number of patients with angiographic follow-up of the aneurysms treated. We studied 53 patients with a total of 128 aneurysms, in 46 of whom we treated 67 aneurysms by the endovascular approach. Of these, 5 aneurysms in 3 patients were treated by occlusion of the parent vessel and 62 aneurysms in 43 patients with coils, 52 with Guglielmi detachable coils and 10 with mechanically detachable spirals. Complete occlusion was obtained in 58 aneurysms, and partial occlusion in 9. The therapy caused permanent neurological deficit in 3 cases (6.5%), and there was 1 case of rebleeding (incomplete occlusion of the aneurysm). No deaths occurred. All aneurysms were treated in 29 of the 53 patients. Endovascular procedures were used for 16 patients (30%), surgery was performed in 1 patient (2%) and the two were combined in 12 (23%). In 23 of 53 cases (43%), unruptured aneurysms were left untreated, usually because of their small size. In 1 patient with unruptured aneurysms, the endovascular approach failed and the patient refused surgery.

Adult↗
PubMed1997

Intracranial aneurysms: endovascular treatment with mechanical detachable spirals in 60 aneurysms.

PURPOSE: To evaluate preliminary results with endovascular treatment (EVT) of intracranial aneurysms with mechanical detachable spirals. MATERIALS AND METHODS: EVT with spirals was attempted in 57 patients with 60 aneurysms (47 berry, nine large, and four giant aneurysms). Thirty-seven patients had subarachnoid hemorrhage (three of whom were also treated for associated aneurysm), nine were asymptomatic, six had headache, three had mass effect, and two had neurologic deficits. RESULTS: EVT with the spirals was achieved in 55 (92%) of the 60 aneurysms. Of 42 treated berry aneurysms and 13 treated large and giant aneurysms, 33 berry and nine large and giant aneurysms underwent 3-month angiographic follow-up. Complete occlusion was attained in 23 berry and four large and giant aneurysms, subtotal occlusion (doubtful or obvious small neck remnant) was obtained in eight berry and four large and giant aneurysms, and incomplete occlusion was obtained in two berry aneurysms and one giant aneurysm. These results were obtained after one procedure in 21 patients, after two procedures in 19 patients, and after three procedures in two patients. Seven patients had complications that necessitated infusion of urokinase. Permanent neurologic deficits were found in three. There were no deaths. CONCLUSION: Good results were obtained with EVT of intracranial aneurysms with mechanical detachable spirals. These spirals are characterized by rapid detachment and low cost.

Adult↗
PubMed1996

Endovascular treatment of anterior communicating artery aneurysms using Guglielmi detachable coils.

The aim of this study was to evaluate endovascular treatment of anterior communicating artery aneurysms using Guglielmi detachable coils GDC. To obtain long-term follow-up, we selected patients treated between October 1992 and March 1994. Among the 251 berry aneurysms treated by detachable coils at our institution, 36 were located at the anterior communicating artery and treated with GDC. The most frequent clinical presentation in this group (86%) was subarachnoid haemorrhage (30 cases). There were 23 aneurysms which were completely and 6 were partially occluded. We did not treat 7 aneurysms. In 3 cases, no endovascular treatment was attempted either because the aneurysmal neck was not clearly distinct from the adjacent, or parent vessels (2 cases), or because the aneurysm sac was too small (1 case). In 4 cases, treatment failed because of atheroma of the cervical and intracranial vessels. Complications were, in the majority of cases, related to clotting (3 cases) with a good outcome in 2 cases and neurological sequelae in 1. In 1 case rupture of the aneurysm occurred during treatment. Endovascular packing was continued until complete occlusion of the aneurysm was achieved and no clinical complication was observed after the treatment. Two patients died as a result of complications of subarachnoid haemorrhage (vasospasm in one case, pulmonary complications in the other). Endovascular treatment using GDC is an efficient technique for treating anterior communicating artery aneurysms even in the acute phase of bleeding.

Adult↗
PubMed1996

Endovascular treatment of pericallosal artery aneurysms.

Recent technical developments have made endovascular treatment using controlled-detachable coils suitable for intracranial aneurysms. However, endovascular approach of the aneurysms of the pericallosal artery remains difficult because of their usual small size and their anatomical situation.

Adult↗