Six arterial anomalies at the base of the skull are reported. Five of these concern the course, o... more Six arterial anomalies at the base of the skull are reported. Five of these concern the course, or the filling, of the middle meningeal artery. After correlation with basic anatomical and embryological facts it appears that a satisfactory embryological explanation, based on regressions and reversal of flux, may be proposed. The same embryological phenomenon is finally applied to the aberrant course of the internal carotid artery, and shows how it must be considered as aberrant flow.
To the Editor: Reul J 1 indicates that detachable coils from MDS are not purely tungsten but also... more To the Editor: Reul J 1 indicates that detachable coils from MDS are not purely tungsten but also contain iron, in the view of spectroscopy. We analyzed the MDS system 2 and found no iron. After dissolution of the coil with acid, we performed ICP-MS (Inductively Coupled Plasma Mass Spectrometry) analysis in scanning mode over the 50-250 mlz range. A skip scan region was set from 75 to 85 m/z to avoid common background polyatomic ion interferences from argon (carrier gas). Tungsten was found in the dissolved coil solution but not in a control sample of 0.65% suprapure nitric acid (figure 1). Tungsten was strictly identified by its isotopic composition (180 m/z: 0.12%; 182 mlz: 26.31 %; 183 m/z: 14.28%; 184 m/z: 30.64% and 186 m/z: 28.64 %) in the dissolved coil solution. The estimated amount of tungsten (obtained from the spiral weight) was checked by comparing the signal of the 32 ppb dilution of the dissolved coil solution to those of a 10 ppb tungsten standard solution (tungsten 1 g/L, ref. 1.19805-0500, Merck) (figure 2). No iron was found in the dissolved coil solution by electrothermal atomic absorption spectrometry. Despite the interesting observation of Reul J 1 in animals, our analysis indicates that the MDS system is purely tungsten.
This study was designed in an attempt to identify the risk factors that could be significantly as... more This study was designed in an attempt to identify the risk factors that could be significantly associated with angiographic recurrences after selective endovascular treatment of aneurysms with inert platinum coils. A retrospective analysis of all patients with selective endovascular coil occlusion of intracranial aneurysms was prospectively collected from 1999 to 2003. There were 455 aneurysms treated with inert platinum coils and followed by digital subtraction angiography. Angiographic results were classified according Roy and Raymond's classification. Recurrences were subjectively divided into minor and major. The most significant predictors for angiographic recurrences were determined by ANOVAs logistic regression, Cochran-Mantel-Haenszel test, Fisher exact probability. Short-term (4.3±1.4 months) follow-up angiograms were available in 377 aneurysms, middle-term (14.1±4.0 months) in 327 and long-term (37.4±11.5 months) in 180. Recurrences were found in 26.8% of treated aneur...
Two arteries arising from the orbit, coursing through the superior orbital fissure to supply the ... more Two arteries arising from the orbit, coursing through the superior orbital fissure to supply the cavernous region and the tentorium, may be identified at angiography. The radiologic and anatomic appearances of these arteries are discussed on the basis of the embryologic development.
Over the last century, ectomycorrhizal plants have been produced in tree nurseries for purposes s... more Over the last century, ectomycorrhizal plants have been produced in tree nurseries for purposes such as the production of edible fungi and improving the outcome of afforestation programs. Independent evaluation of the mycorrhization methods used by such nurseries, and of the mycorrhizal quality of their products, is in the interests of both producers and customers (Vosátka, 2009). The Spanish authorities have increasingly been asking for the control of the quality of mycorrhized plants before granting funds for new plantations, especially truffle orchards. In fact, this has been of academic concern since the 1 st International Truffle Congress (Spoleto, Italy, 1968) through to the recent ICOM6 (Belo Horizonte, Brazil, 2009). Several protocols for evaluating the mycorrhizal quality of plants exist (Bencivenga et al., 1987; Abourouh, 1994; Fischer and Colinas, 1996; Miko and Gazo, 2007), but these are not strictly followed. Those charged with quality control largely rely on personal adaptations of these methods (Bach et al., 2010) or even completely different methods. A reproducible and inexpensive method for evaluating the mycorrhizal quality of plants is particularly
The purpose of this study was to compare the volumetric results of intracranial aneurysms obtaine... more The purpose of this study was to compare the volumetric results of intracranial aneurysms obtained by calculation of the volume of an ellipsoid with those obtained with 3D rotational angiography (3D-RA). First, the precision of 3D-RA in the assessment of volumetric measurement of intracranial aneurysm had to be established. The 3D-RA gave an overestimation of 4% to 5.5% of the actual volume of a spherical object. Then, 484 consecutive human intracranial aneurysms were studied with 3D-RA, allowing the determination of their volume. In the meantime, aneurysm dimensions (height and width) were measured on the 3D pictures generated by the 3D-RA. The aneurysm volumes were obtained by considering the aneurysm shape to be ellipsoidal, according to the formula: (formula in text). The calculated aneurysm volume (V(calc)) overestimated by 15 +/- 38% the volume given by 3D-RA. Taking into account a 10% margin of error, 227 (47%) aneurysms were overestimated by 44 +/- 34%, whereas 113 (23%) ane...
The traditional endovascular approach to a cerebral aneurysm is anterograde, with the embolizatio... more The traditional endovascular approach to a cerebral aneurysm is anterograde, with the embolization and balloon protection catheters introduced via the parent vessel. Unfortunately, this approach may be restrictive, because these catheters cannot always be navigated at an optimal angle into the arterial branch that needs balloon protection or the part of the aneurysm that needs coiling. The purpose of this study was to determine the efficacy of a retrograde approach. Twelve patients, seven women and five men, 28 to 65 years old (mean age, 45 years), were treated via the retrograde approach between March 1998 and February 1999. Three patients were treated for acutely ruptured aneurysms following subarachnoid hemorrhage. The rest had asymptomatic, unruptured aneurysms. We were able to accomplish endovascular treatment in 10 cases. In the other two, the attempted retrograde route of access could not be achieved. The treatment afforded complete embolization in nine of the 10 patients. Sy...
To establish that intra-arterial fibrinolysis of the ophthalmic artery can still be efficient 8 h... more To establish that intra-arterial fibrinolysis of the ophthalmic artery can still be efficient 8 hours or more after a central retinal artery occlusion. Nine to twenty hours (average 12.5 H) after a loss of vision due to a central retinal artery occlusion or the occlusion of its branches, 7 patients were treated by intra-arterial fibrinolysis. The vision of the affected eye was limited to light perception for four patients, to hand movement at 1 meter for two patients, and to 4/10 P2 for one patient. Under radiological guidance, 300.000 IU of urokinase was injected through a microcatheter placed in the ophthalmic artery (6 patients), or in the facial artery (1 patient); in this case the angiogram showed an occlusion of the internal carotid artery and a retrograde filling of the ophthalmic artery through the facial artery. We did not observed any complication. The 3 patients who had a vision better than light perception recovered a vision of 10/10 P2. For the others: two patients reco...
Annales d'oto-laryngologie et de chirurgie cervico faciale : bulletin de la Société d'oto-laryngologie des hôpitaux de Paris, 1994
Direct intratumoral embolization was used to treat five patients with vascularized tumors of the ... more Direct intratumoral embolization was used to treat five patients with vascularized tumors of the head and neck: 2 nasopharyngeal angiofibroma, 2 glomus jugulare tumors and 1 hemangiopericytoma. Embolization was performed by direct puncture and intratumoral injection of a plastic mixture under angiographic control. In 4 patients, embolization was performed preoperatively. Devascularization was induced in at least 90% of the volume of these tumors, thus facilitating subsequent surgical removal of the tumor. In 1 patient, embolization was performed with palliative intent. Good regression of symptoms was obtained.
Annales d'oto-laryngologie et de chirurgie cervico faciale : bulletin de la Société d'oto-laryngologie des hôpitaux de Paris, 1977
In this article, the authors stress three fundamental points in the diagnostic and therapeutic an... more In this article, the authors stress three fundamental points in the diagnostic and therapeutic angiographic study of tympano-jugular glomus tumours. The first basic concept is the need for complete right, left, internal carotid, vertebral and external carotid angiographic examination. The latter must be selective, regardless of the information provided by common carotid arteriography. This implies prior knowledge of the different arteries which may "supply" the gloumus tumour. The second basic point is the concept of vascular compartment, , often mutually independent and vascularised by a single pedicle. The juxtaposition of the different vascular compartments gives the exact size of the tumour. The third important point concerns embolisation carried out at the same time as diagnostic angiography. This is invariably indicated on a pre-operative basis, except in two circumstances: --when the glomus, tumour is small and situated close to the drum of the tympanum, its surgica...
Six arterial anomalies at the base of the skull are reported. Five of these concern the course, o... more Six arterial anomalies at the base of the skull are reported. Five of these concern the course, or the filling, of the middle meningeal artery. After correlation with basic anatomical and embryological facts it appears that a satisfactory embryological explanation, based on regressions and reversal of flux, may be proposed. The same embryological phenomenon is finally applied to the aberrant course of the internal carotid artery, and shows how it must be considered as aberrant flow.
To the Editor: Reul J 1 indicates that detachable coils from MDS are not purely tungsten but also... more To the Editor: Reul J 1 indicates that detachable coils from MDS are not purely tungsten but also contain iron, in the view of spectroscopy. We analyzed the MDS system 2 and found no iron. After dissolution of the coil with acid, we performed ICP-MS (Inductively Coupled Plasma Mass Spectrometry) analysis in scanning mode over the 50-250 mlz range. A skip scan region was set from 75 to 85 m/z to avoid common background polyatomic ion interferences from argon (carrier gas). Tungsten was found in the dissolved coil solution but not in a control sample of 0.65% suprapure nitric acid (figure 1). Tungsten was strictly identified by its isotopic composition (180 m/z: 0.12%; 182 mlz: 26.31 %; 183 m/z: 14.28%; 184 m/z: 30.64% and 186 m/z: 28.64 %) in the dissolved coil solution. The estimated amount of tungsten (obtained from the spiral weight) was checked by comparing the signal of the 32 ppb dilution of the dissolved coil solution to those of a 10 ppb tungsten standard solution (tungsten 1 g/L, ref. 1.19805-0500, Merck) (figure 2). No iron was found in the dissolved coil solution by electrothermal atomic absorption spectrometry. Despite the interesting observation of Reul J 1 in animals, our analysis indicates that the MDS system is purely tungsten.
This study was designed in an attempt to identify the risk factors that could be significantly as... more This study was designed in an attempt to identify the risk factors that could be significantly associated with angiographic recurrences after selective endovascular treatment of aneurysms with inert platinum coils. A retrospective analysis of all patients with selective endovascular coil occlusion of intracranial aneurysms was prospectively collected from 1999 to 2003. There were 455 aneurysms treated with inert platinum coils and followed by digital subtraction angiography. Angiographic results were classified according Roy and Raymond's classification. Recurrences were subjectively divided into minor and major. The most significant predictors for angiographic recurrences were determined by ANOVAs logistic regression, Cochran-Mantel-Haenszel test, Fisher exact probability. Short-term (4.3±1.4 months) follow-up angiograms were available in 377 aneurysms, middle-term (14.1±4.0 months) in 327 and long-term (37.4±11.5 months) in 180. Recurrences were found in 26.8% of treated aneur...
Two arteries arising from the orbit, coursing through the superior orbital fissure to supply the ... more Two arteries arising from the orbit, coursing through the superior orbital fissure to supply the cavernous region and the tentorium, may be identified at angiography. The radiologic and anatomic appearances of these arteries are discussed on the basis of the embryologic development.
Over the last century, ectomycorrhizal plants have been produced in tree nurseries for purposes s... more Over the last century, ectomycorrhizal plants have been produced in tree nurseries for purposes such as the production of edible fungi and improving the outcome of afforestation programs. Independent evaluation of the mycorrhization methods used by such nurseries, and of the mycorrhizal quality of their products, is in the interests of both producers and customers (Vosátka, 2009). The Spanish authorities have increasingly been asking for the control of the quality of mycorrhized plants before granting funds for new plantations, especially truffle orchards. In fact, this has been of academic concern since the 1 st International Truffle Congress (Spoleto, Italy, 1968) through to the recent ICOM6 (Belo Horizonte, Brazil, 2009). Several protocols for evaluating the mycorrhizal quality of plants exist (Bencivenga et al., 1987; Abourouh, 1994; Fischer and Colinas, 1996; Miko and Gazo, 2007), but these are not strictly followed. Those charged with quality control largely rely on personal adaptations of these methods (Bach et al., 2010) or even completely different methods. A reproducible and inexpensive method for evaluating the mycorrhizal quality of plants is particularly
The purpose of this study was to compare the volumetric results of intracranial aneurysms obtaine... more The purpose of this study was to compare the volumetric results of intracranial aneurysms obtained by calculation of the volume of an ellipsoid with those obtained with 3D rotational angiography (3D-RA). First, the precision of 3D-RA in the assessment of volumetric measurement of intracranial aneurysm had to be established. The 3D-RA gave an overestimation of 4% to 5.5% of the actual volume of a spherical object. Then, 484 consecutive human intracranial aneurysms were studied with 3D-RA, allowing the determination of their volume. In the meantime, aneurysm dimensions (height and width) were measured on the 3D pictures generated by the 3D-RA. The aneurysm volumes were obtained by considering the aneurysm shape to be ellipsoidal, according to the formula: (formula in text). The calculated aneurysm volume (V(calc)) overestimated by 15 +/- 38% the volume given by 3D-RA. Taking into account a 10% margin of error, 227 (47%) aneurysms were overestimated by 44 +/- 34%, whereas 113 (23%) ane...
The traditional endovascular approach to a cerebral aneurysm is anterograde, with the embolizatio... more The traditional endovascular approach to a cerebral aneurysm is anterograde, with the embolization and balloon protection catheters introduced via the parent vessel. Unfortunately, this approach may be restrictive, because these catheters cannot always be navigated at an optimal angle into the arterial branch that needs balloon protection or the part of the aneurysm that needs coiling. The purpose of this study was to determine the efficacy of a retrograde approach. Twelve patients, seven women and five men, 28 to 65 years old (mean age, 45 years), were treated via the retrograde approach between March 1998 and February 1999. Three patients were treated for acutely ruptured aneurysms following subarachnoid hemorrhage. The rest had asymptomatic, unruptured aneurysms. We were able to accomplish endovascular treatment in 10 cases. In the other two, the attempted retrograde route of access could not be achieved. The treatment afforded complete embolization in nine of the 10 patients. Sy...
To establish that intra-arterial fibrinolysis of the ophthalmic artery can still be efficient 8 h... more To establish that intra-arterial fibrinolysis of the ophthalmic artery can still be efficient 8 hours or more after a central retinal artery occlusion. Nine to twenty hours (average 12.5 H) after a loss of vision due to a central retinal artery occlusion or the occlusion of its branches, 7 patients were treated by intra-arterial fibrinolysis. The vision of the affected eye was limited to light perception for four patients, to hand movement at 1 meter for two patients, and to 4/10 P2 for one patient. Under radiological guidance, 300.000 IU of urokinase was injected through a microcatheter placed in the ophthalmic artery (6 patients), or in the facial artery (1 patient); in this case the angiogram showed an occlusion of the internal carotid artery and a retrograde filling of the ophthalmic artery through the facial artery. We did not observed any complication. The 3 patients who had a vision better than light perception recovered a vision of 10/10 P2. For the others: two patients reco...
Annales d'oto-laryngologie et de chirurgie cervico faciale : bulletin de la Société d'oto-laryngologie des hôpitaux de Paris, 1994
Direct intratumoral embolization was used to treat five patients with vascularized tumors of the ... more Direct intratumoral embolization was used to treat five patients with vascularized tumors of the head and neck: 2 nasopharyngeal angiofibroma, 2 glomus jugulare tumors and 1 hemangiopericytoma. Embolization was performed by direct puncture and intratumoral injection of a plastic mixture under angiographic control. In 4 patients, embolization was performed preoperatively. Devascularization was induced in at least 90% of the volume of these tumors, thus facilitating subsequent surgical removal of the tumor. In 1 patient, embolization was performed with palliative intent. Good regression of symptoms was obtained.
Annales d'oto-laryngologie et de chirurgie cervico faciale : bulletin de la Société d'oto-laryngologie des hôpitaux de Paris, 1977
In this article, the authors stress three fundamental points in the diagnostic and therapeutic an... more In this article, the authors stress three fundamental points in the diagnostic and therapeutic angiographic study of tympano-jugular glomus tumours. The first basic concept is the need for complete right, left, internal carotid, vertebral and external carotid angiographic examination. The latter must be selective, regardless of the information provided by common carotid arteriography. This implies prior knowledge of the different arteries which may "supply" the gloumus tumour. The second basic point is the concept of vascular compartment, , often mutually independent and vascularised by a single pedicle. The juxtaposition of the different vascular compartments gives the exact size of the tumour. The third important point concerns embolisation carried out at the same time as diagnostic angiography. This is invariably indicated on a pre-operative basis, except in two circumstances: --when the glomus, tumour is small and situated close to the drum of the tympanum, its surgica...
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