[Use of vascularized bone grafts in surgery of the spine. Apropos of 6 cases]. / Utilisation de greffons osseux vascularisés en chirurgie du rachis. A propos de six cas.

The Authors report six cases in which a pedicle bone graft was placed by an anterior approach to stabilise a spine deformity. In two cases they used a fibula, in four others it was a cortico-cancellous iliac graft. One case was a neurofibromatosis spine deformity, the second was a Cooley disease, the third one was an hydatidosis, the three remaining cases were spondylolitheses. All patients had been initially operated on by a posterior approach. Fusion was obtained in all cases.

[Peripheral circulatory effects of sodium nitroprussate. Evaluation by plethysmography and capillaroscopy]. / Effets circulatoires périphériques du nitroprussiate de sodium. Appréciation par pléthysmographie et capillaroscopie.

Circulatory effects of intravenous injection of sodium nitroprusside are appreciated in 6 patients by monitoring systemic pressure, heart rate, digital systolic pressure, pulse plethysmography and nail-fold capillaroscopy. Low doses of nitroprusside (1.5 microg./kg/mn) enhance digital blood flow (+ 78.9%) and maximum height of the plethysmographic curve (+ 71.6%), without any significant modification of the systemic blood pressure (- 0.6%), heart rate (+ 6.3%) and digital pressure (- 1.15%). The peripheral resistances are strongly reduced. Nail fold capillaroscopy is unchanged. Higher doses, even with an adequate vascular filling, are potentially harmful for microcirculation.