Improved precision of radiographic measurements for distal radius fractures after a technique-teaching tutorial.

Background: For the management of distal radius fractures, surgical decision-making depends on radiographic measurements of indicators including radial inclination (RI), ulnar variance (UV) and radial tilt (RT). Evaluation of the inter- and intrarater reliability of surgeons' measurements of these criteria has been limited. Methods: Twelve physicians were invited to participate in this study. Anonymously, they measured RI, UV and RT on 30 digitally stored radiographs of distal radius fractures on 3 occasions, each at least 1 week apart, using online measuring tools. After taking the third set of measurements, the participants were given a tutorial by the senior author (G.J.) on a single technique to measure all 3 indicators. The participants then took 3 more sets of measurements using only the technique they had been taught. Intraclass correlation coefficients (ICCs) were used to evaluate interrater reliability each week. Multiple logistic regression was used to calculate the effect of the tutorial, controlling for week of study along with reader (participant) and patient variance. Results: The ICCs indicated that the participants' measurement precision improved promptly after the tutorial, and this improvement was sustained through subsequent readings. The odds of an "accurate" measurement (within 2° of the senior author's measurements for RI, 1 mm for UV and 4° for RT) was 1.7 times higher for RI, 2.7 times higher for UV and 2.3 times higher for RT after the tutorial; all of these results were statistically significant. Conclusion: Surgeons ought to be familiar with a method to reproducibly measure the indicators used in the published guidelines for surgical intervention. The tutorial on a single standardized technique for online measurement of RI, UV and RT in distal radius fractures improved measurement precision.

Contexte: Pour la prise en charge des fractures du radius distal, la prise de décisions chirurgicales dépend de la mesure de plusieurs indicateurs sur les images radiographiques : l'inclinaison radiale (IR), la variance ulnaire (VU) et l'inclinaison sagittale du radius (ISR). La fiabilité interévaluateurs et intra-évaluateur des mesures de ces critères par les chirurgiens a été peu étudiée. Méthodes: Nous avons invité 12 médecins à participer à l'étude. En tout anonymat, ils ont déterminé l'IR, la VU et l'ISR au moyen d'outils de mesure en ligne sur 30 radiographies numérisées de fractures du radius distal. Ils ont répété l'exercice à 3 reprises, à au moins 1 semaine d'intervalle. Après la troisième série, les participants ont suivi un tutoriel de l'auteur principal (G. J.) sur une technique qui peut à elle seule mesurer les 3 indicateurs. Les participants ont ensuite fait 3 autres séries de mesures en utilisant seulement cette technique. Nous avons évalué la fiabilité interévaluateurs pour chaque semaine à partir des coefficients de corrélation intraclasse (CCI). De plus, nous avons calculé l'effet du tutoriel par régression logistique multiple, en tenant compte de la semaine de l'étude et de la variation selon les lecteurs (participants) et les patients. Résultats: Les CCI indiquent que la précision des mesures s'est améliorée rapidement après le tutoriel; cette amélioration a d'ailleurs persisté tout au long des séries subséquentes. La probabilité d'une mesure « exacte ¼ (dont l'écart par rapport aux mesures de l'auteur principal est inférieur à 2° pour l'IR, à 1 mm pour la VU et à 4° pour l'ISR) était 1,7 fois plus grande pour l'IR, 2,7 fois plus grande pour la VU et 2,3 fois plus grande pour l'ISR après le tutoriel. Tous ces résultats sont statistiquement significatifs. Conclusion: Les chirurgiens doivent connaître une méthode de mesure reproductible des indicateurs utilisés dans les directives cliniques publiées pour guider l'intervention chirurgicale. Le tutoriel sur la technique normalisée de mesure en ligne de l'IR, de la VU et de l'ISR dans les cas de fracture du radius distal a amélioré la précision des mesures.

Spontaneous Spinal Subarachnoid Hemorrhage from a Ruptured Radiculopial Artery Aneurysm.

BACKGROUND: Spontaneous spinal subarachnoid hemorrhage is an uncommon entity and is even rarer when secondary to intraspinal ruptured aneurysm. The clinical presentation of these cases usually includes back pain and headache; however, we report a unique case in which the patient became acutely paraplegic. CASE DESCRIPTION: A 54-year-old woman initially presented with thunderclap headache and interscapular pain. There was no evidence of subarachnoid hemorrhage on noncontrast computed tomography of the head, but lumbar puncture revealed xanthochromia-positive cerebrospinal fluid. Subsequent computed tomography angiography identified a small right superior hypophyseal aneurysm. The patient then became acutely paraplegic during neurosurgical assessment in the emergency department. Urgent magnetic resonance imaging revealed extensive intradural hemorrhage in the cervicothoracic region, prompting emergent surgical decompression. At surgery, this hemorrhage was noted in a subarachnoid location, but no specific source was identified. Postoperative spinal digital subtraction angiography revealed an intraspinal aneurysm of the posterior spinal circulation involving the left T2 radiculopial artery, which was resected in a subsequent uneventful operation within the same hospital admission. CONCLUSIONS: This unique clinical case highlights a rare cause of spontaneous acute paralysis and further demonstrates the safety of obliterating an intraspinal aneurysm via operative resection.

Neurophysiological monitoring of displaced odontoid fracture reduction in a 3-year-old male.

INTRODUCTION: Odontoid fractures in young children are rare. Most authors advocate for closed reduction and external stabilization as first line treatment. Unlike adults, young children are much less amenable to an awake reduction for real-time assessment of neurological function. We used spinal cord monitoring, as used in spine surgery, to assess the function of the spinal cord during the closed reduction in our 31-month-old patient. CASE PRESENTATION: A 31-month-old male presented with a displaced odontoid fracture and ASIA C spinal cord injury. Given his age, closed reduction and halo application were completed under general anesthesia guided by neuromonitoring. A less-than-ideal reduction initially was accepted due to a decline in motor-evoked potentials. Subsequently, there was no change in neurological status. The reduction was repeated under anesthesia, with monitoring, a number of times until good correction was achieved. Ultimately, a surgical fusion was required due to ligamentous instability. The child achieved a very good neurological outcome and a stable spine. DISCUSSION: Neuromonitoring is an important adjunct to closed reductions when complete and reliable neurological assessment is not possible.

Spinal Instability Neoplastic Score (SINS): Reliability Among Spine Fellows and Resident Physicians in Orthopedic Surgery and Neurosurgery.

STUDY DESIGN: Reliability analysis. OBJECTIVES: The Spinal Instability Neoplastic Score (SINS) was developed for assessing patients with spinal neoplasia. It identifies patients who may benefit from surgical consultation or intervention. It also acts as a prognostic tool for surgical decision making. Reliability of SINS has been established for spine surgeons, radiologists, and radiation oncologists, but not yet among spine surgery trainees. The purpose of our study is to determine the reliability of SINS among spine residents and fellows, and its role as an educational tool. METHODS: Twenty-three residents and 2 spine fellows independently scored 30 de-identified spine tumor cases on 2 occasions, at least 6 weeks apart. Intraclass correlation coefficient (ICC) measured interobserver and intraobserver agreement for total SINS scores. Fleiss's kappa and Cohen's kappa analysis evaluated interobserver and intraobserver agreement of 6 component subscores (location, pain, bone lesion quality, spinal alignment, vertebral body collapse, and posterolateral involvement of spinal elements). RESULTS: Total SINS scores showed near perfect interobserver (0.990) and intraobserver (0.907) agreement. Fleiss's kappa statistics revealed near perfect agreement for location; substantial for pain; moderate for alignment, vertebral body collapse, and posterolateral involvement; and fair for bone quality (0.948, 0.739, 0.427, 0.550, 0.435, and 0.382). Cohen's kappa statistics revealed near perfect agreement for location and pain, substantial for alignment and vertebral body collapse, and moderate for bone quality and posterolateral involvement (0.954, 0.814, 0.610, 0.671, 0.576, and 0.561, respectively). CONCLUSIONS: The SINS is a reliable and valuable educational tool for spine fellows and residents learning to judge spinal instability.

Spinal dural arteriovenous fistula: a case series and review of imaging findings.

INTRODUCTION: Spinal dural arteriovenous fistulae (sdAVF) are rare lesions. Patients typically present with slowly progressive myelopathy that is often mistaken for degenerative cervical or lumbar stenosis. On spinal magnetic resonance imaging (MRI), multisegmental T2 hyperintensities along with associated flow voids are pathognomonic of sdAVF. However, diagnosis can be difficult. Definitive diagnosis and localization is achieved with complete spinal angiography. Treatment options include open surgical ligation, endovascular embolization or multimodality treatment. The purpose of this study is to present a series of cases to aid in the assessment, diagnosis and treatment of this unusual pathology. CASE PRESENTATION: We present 10 cases of sdAVF treated at our center over an 8-year period. Seventy percent of patients were male. The mean age of presentation was 62.6 years. The most common lesion was a dorsal dural AVF with single feeder. All patients underwent open surgical ligation, six having preoperative coil embolization of the radicular artery to allow for intraoperative localization of the fistula. Eight patients showed improvement following treatment as graded by the Nurick system. Two patients failed to improve. None of the patients worsened. One patient had a radiation burn from the spinal angiogram requiring secondary closure and one patient had a pseudomeningocele at the site of surgery that resolved. DISCUSSION: The successful treatment of sdAVF requires a detailed understanding of clinical presentation and imaging findings to allow for precise treatment. Owing to the rarity of the condition, clinicians must continue to share their experiences to advance our knowledge.