Lumbar Nerve Root Compression due to Leakage of Bone Cement after Vertebroplasty / 대한신경손상학회지

We experienced a 73-year-old male with lumbar nerve root compression due to leakage of bone cement after vertebroplasty. He was underwent vertebroplasty for acute osteoporotic L4 compression fracture at our hospital. After vertebroplasty, his back pain was improved but right leg pain was newly developed. Lumbar computed tomography scanning showed that bone cements were leaked along the L4 nerve root. The leaked cements around L4 nerve root were removed carefully via paraspinal muscle-splitting approach. After operation, severe right leg radiating pain was improved. We recommend proper entry point, high viscosity of polymethylmethacrylate and constant monitoring can reduce complication.

The Reference Values and Influencing Factors of TCD Measurements in 200 Normal Korean Adults

The clinical utility of transcranial doppler ultrasonography (TCD) in cerebrovascular disease has been extended recently. Although number of studies have been performed to define normal reference values of TCD measurements, they have some limitations to be used as reference values which include relatively small number of subjects, lack of data about some cerebral vessels and/or parameters. This study was aimed to obtain clinically useful reference values of TCD measurements with consideration of the influence of age and sex in Korean adults, particularly who are in stroke-prone age group. We measured flow velocities, pulsatility indecies, side-to-side differences and vasomotor reactivities of all intra-and extracranial cerebral arteries using TCD in 209 normal Korean adults (age, 23-78 years; 94 men and 115 women), and analyzed the influence of age and sex on those measurements. With advancing age, subjects showed significant reduction in velocity measurements and increase in pulsatility indecies of most examined arteries. Females showed hight velocities of middle cerebral, internal carotid, vertebral and basilar artery and lower pulsatility indecies of middle cerebral arteries compared with males. Asymmetry measurements including side-to-side differences and asymmetry index, and ,breath holding index testing vasomotor reactivity were also measured and the normal range of those parameters were calculated. Since present study included large number of subjects, and checked paramenters of TCD in both extra- as well as intracranial cerebral arteries, we are convinced that these results can be used as a reference data of TCD measurements in Korean adults.