The role of reduction in operative treatment of spondylolytic spondylolisthesis.

Isthmic spondylolisthesis is a frequently encountered spinal disorder (3-5% of the population). The latest developments in spondylo-implantology have increased interest in operative treatment of slip. The reduction of slip, however, remains controversial and is broadly discussed.

Operative treatment of hangman's fractures of C2. Posterior direct pars screw repair or anterior plate-cage stabilization?

Background And Purpose: Feasibility study and evaluation of complications of two different C1-C2 motion-sparing surgical methods for hangman's fracture of C2.

Material And Methods: From 2001 till 2005, seventeen patients were operated on because of unstable type II (according to Effendi) hangman's fractures. The patients were treated either with transoral C2-C3 discectomy with plate-cage stabilization or with posterior direct pars screw repair.

The process of subsidence after cervical stabilizations by cage alone, cage with plate and plate-cage. A biomechanical comparative study.

Background And Purpose: Clinical observations show that subsidence of cervical interbody implants takes place in the early postoperative period. Additional plating or use of a plate-cage is thought to be helpful to avoid excessive subsidence. We performed a biomechanical comparative study to assess the process of subsidence after the use of three different cervical stabilization methods.

Early cerebral hemodynamic alternations in patients operated on the first, second and third day after aneurysmal subarachnoid hemorrhage.

Surgery timing after aneurysmal subarachnoid hemorrhage (SAH) may influence the risk of vasospasm after early surgical procedure and is correlated with SAH extensiveness. A group consisting of 127 patients with aneurysmal SAH was studied. The changes of mean flow velocity (MFV) were measured in middle cerebral artery (MCA) and in anterior cerebral artery (ACA) by transcranial Doppler sonography (TCD) in three groups of patients divided according to the surgery timing (on the first, second and third day after SAH).

Cervical spine stabilization by plate-cage. Clinical evaluation.

Background And Purpose: Cervical plate-cages have recently been introduced to clinical practice. Clinical and radiographic results of D-Fun-CE plate-cage stabilization were studied.

Material And Methods: 34 patients were treated surgically with the mean follow-up of 25 months.

[Complications of a transpedicular stabilization of thoraco-lumbar burst fractures].

Complications of transpedicular stabilizations of thoraco-lumbar burst fractures are presented on the basis of literature review and own experiences. Unstable thoraco-lumbar burst fractures create the most difficult biomechanical conditions for a stabilizer. A literature review was done to estimate the effectiveness of vertebral body height restoration and its maintenance, the effectiveness of transpedicular grafting, the fusion rate and the implant-related complications rate.

[Importance of early operative decompression of spinal cord after cervical spine injuries].

Background And Purpose: There is no standard timing of the spinal cord decompression. Experimental animal models and clinical investigations on Methylprednisolone (NASCIS-2 and -3) indicate that the time up to 8 hours is the optimal therapeutic window for the early spinal cord decompression. We accepted this time window in our practice.

[Subsidence and its effects on the anterior plate stabilization in the course of cervical interbody spondylodesis. Part II. Clinical evaluation. Study design].

Study Design: Subsidence is a common phenomenon in the process of interbody fusion. The paper presents a retrospective clinical and radiological evaluation of subsidence in a group of 23 patients after cervical corpectomy with mesh cage and plate stabilization. Subsidence magnitude and its impact on the stabilizing system and on the clinical and radiological outcome were estimated.

[Subsidence and its effect on the anterior plate stabilization in the course of cervical spondylodesis. Part I: definition and review of literature].

A definition of subsidence in terms of spinal biomechanics is presented in the paper. Subsidence is defined as sinking of a body with a higher elasticity modulus (e.g.

The relation between cerebral blood flow velocities as measured by TCD and the incidence of delayed ischemic deficits. A prospective study after subarachnoid hemorrhage.

Patients (n = 127) with aneurysmal subarachnoid hemorrhage (SAH) were examined by transcranial Doppler ultrasonography (TCD) in a prospective study to follow the time course of the posthemorrhagic blood flow velocity in both the middle cerebral artery (MCA) and in the anterior cerebral artery (ACA). Results were analysed to reveal their relationship and predictive use with respect to the occurrence of delayed ischemic deficits. Mean flow velocities (MFV) higher than 120 cm sec(-1) in MCA and 90 cm sec(-1) in ACA were interpreted as indicative for significant vasospasm.