Medida indirecta de la presión intracraneal perioperatoria. Utilidad de ecografía ocular y orbitaria

Abstract

AimsMeasurement of optic nerve diameter variations in lower limb trauma surgery. Comparation between patients under general or spinal anesthesia changes. MethodsProspective observational study in 50 patients undergoing lower limb trauma surgery under general (26) or spinal anesthesia (24). Data on filiation, surgical, anesthetic and optic nerve diameter were collected at three moments: before surgery, 10 minutes after dural puncture or anesthesia induction, and 10 minutes after motor blockade recovery. Descriptive statistical analysis and Spearman Index to study groups (general anesthesia and spinal anesthesia) correlation. Results25 males and 25 females were studied, 63,40 ± 16,36 years aged, 77 ± 10,66 kg weight, 93,20 ± 23,659 minutes of surgery duration. Ischemia was needed on 28 cases, for 58,15 ± 10,57 minutes of duration. Preoperative optic nerve measurements: 5,06 ± 0,89 mm (right eye) and 4,45 ± 0,7955 (left eye); intraoperative: 5,70 ± 0,77 mm (right eye) and 4,84 ± 0,75 (left eye); Postoperative: 4,91 ± 0,88 mm (right eye) and 4,46 ± 0,64 (left eye). Two both groups presented similar data. Bilateral statistic signification between groups in preoperative (p< 0.01) and postoperative data. ConclusionsOptic nerve diameter grows after spinal anesthesia and general anesthesia as well; to recover preoperative data in immediate postoperative period.