Real-time heart rate variability analysis as a means of hypercapnia detection.

We hypothesized that heart rate variability (HRV) can be used as a physiological monitor of exposures to hypercapnia. HRV was analyzed in 15 male subjects breathing air and then air plus 4%, 5% or 6% carbon dioxide (CO2). A progressive elevation in randomness of HRV best depicted as a divergence of data on Poincar é plots of self-similarity occurred as CO2 increased, and resolved when returning sd to ambient conditions.

Validation and analysis of a multi-site MIS Prospective Registry through sub-analysis of an MIS TLIF Subgroup.

Study Design: Retrospective analysis of multi-site, prospectively collected database.

Objective: To assess the validity and utility of a prospective spine registry by sub-analysis of patients treated with MIS TLIF.

Background: The MIS registry is a large-scale, multi-center series of prospectively collected clinical information on outcomes, complications, and adverse events for minimally invasive spine procedures for the treatment of degenerative lumbar conditions.

Advances in technology and surgical technique in spine surgery.

This comprehensive review article encompasses a broad variety of topics within the spinal literature and includes an update on the latest technology and techniques for the spine.

Thoracoscopic spinal fusion compared with posterior spinal fusion for the treatment of thoracic adolescent idiopathic scoliosis. Surgical technique.

Background: Posterior spinal fusion with segmental instrumentation is the gold standard for the surgical treatment of thoracic adolescent idiopathic scoliosis. More recently, anterior surgery and video-assisted thoracoscopic surgery with spinal instrumentation have become an option. The purpose of the present study was to compare the radiographic and clinical outcomes as well as pulmonary function in patients managed with either anterior thoracoscopic or posterior surgery.

Thoracoscopic spinal fusion compared with posterior spinal fusion for the treatment of thoracic adolescent idiopathic scoliosis.

Background: Posterior spinal fusion with segmental instrumentation is the gold standard for the surgical treatment of thoracic adolescent idiopathic scoliosis. More recently, anterior surgery and video-assisted thoracoscopic surgery with spinal instrumentation have become available. The purpose of the present study was to compare the radiographic and clinical outcomes as well as pulmonary function in patients managed with either anterior thoracoscopic or posterior surgery.

Complications of halo fixation of the cervical spine.

Halo fixators play an integral role in stabilizing the cervical spine. They are most widely used after upper cervical to midcervical spine fractures and dislocations and as a supplement to various surgical fixation techniques. Compared with supine cervical traction techniques, halo fixators allow early patient mobilization and shorten hospital stays.