[Experimental intracranial venous microsurgery. Bypass of the sagittal sinus for arterial or venous repair and preoperative measurement of the cerebral impedance in the dog].
By-passes of the sagittal sinus-which is 2,5 mm in diameter-were carried out with autogenous arterial or venous grafts, in 34 dogs, using the classical microtechniques (operative microscope, micro-instruments, micro-sutures...). Controls were done both 1 degree by angiography (direct sinography was the only convenient procedure to visualize the sinus and the by-pass) during survival, and 2 degrees by anatomical and histological examination after sacrifying the animals, on an average the 40th post-operative day (from the 10th to the 75th day). The early patency rate (within the first post-operative month) was 76 p. 100. All cases of early thromboses, which affected especially venous autografts, were related to technical insufficiencies. The late patency rate (after a one month follow-up) was only 64 p. 100, because of the secondary occlusion of some arterial autografts. All these late thromboses were related to an extensive fibrosis of the arterial wall.
D000818:Animals; D001158:Arteries / Q000637:transplantation; D001929:Brain Edema / Q000175:diagnosis; D002540:Cerebral Cortex / Q000502:physiology; D002560:Cerebrovascular Circulation; D002561:Cerebrovascular Disorders / Q000175:diagnosis; D004285:Dogs; D008866:Microsurgery / Q000379:methods*; D008991:Monitoring, Physiologic; D011183:Postoperative Complications; D013997:Time Factors; D014182:Transplantation, Autologous / Q000379:methods; D014680:Veins / Q000637:transplantation
Microchirurgie veineuse intracranienne expérimentale. Pontage du sinus sagittal par autogreffe artérielle ou veineuse et mesures peropératoires de l'impédance cérébrale, chez le chien