Contributions of Turkish neurosurgeons on the studies about autonomic nervous system dysfunction following experimental subarachnoid hemorrhage

Spontaneous subarachnoid hemorrhage accounts for around 5% of all cases of stroke. Pathophysiologic autonomic nervous system changes have been frequently observed following SAH, In this paper, the interest of Turkish neurosurgeons in studies of autonomic nervous system dysfunction following experimental subarachnoid hemorrhage studies was analyzed. The searched terms experimental subarachnoid hemorrhage, autonomic nervous system was used for Pubmed search. 83 studies were analyzed. Many papers from Turkey were published (44 studies, 53% of all studies came from Turkey. Rabbits were the most preferred animals (in 48 studies, 57.8%). Neurosurgeons and neuroscientists from Turkey published many studies for autonomic nervous system dysfunction after SAH. [Med-Science 2021; 10(2.000): 583-5

Posterior longitudinal ligament suturation after lumbar discectomy provides postoperative a large intradural area: First report

Background: Stability and flexibility of the spine are provided by the posterior longitudinal ligament ( PLL). It plays a key role in the pathogenesis of lumbar disc herniation (LDH) by preventing disc protrusion. The effect of the suturing of the PLL on the intradural area was investigated. Patients and Methods: The patients were included in whom lumbar microdiscectomy was performed between January 2021 and July 1, 2022. The patients were randomly divided into two groups as PLLs were sutured and unsutured. Results: Forty-six (23 males and 23 females) patients were included. The PLLs were sutured in 22 patients (Group 1) and not sutured in 24 patients (Group 2). The levels, sides of LDHs, and ages and gender of patients were also analyzed in both groups, which were not statistically significant. Preoperative mean spinal intradural areas were 77.29 mm2 for the PLL unsutured group and 85.40 mm2 for the PLL sutured group (Groups 1 and 2). For patients in Groups 1 and 2, the postoperative mean spinal intradural areas grew to 134.73 mm2 and 96.12 mm2, respectively. The difference in preoperative mean spinal intradural regions between the two groups was not statistically significant; however, Group 1 showed a substantial difference (sutured PLL patients). Conclusions: This study first time indicates that suturing PLL has a protective and supportive role in patients who were operated on for LDH

Ligamentum flavum hematomas: Why does it mostly occur in old Asian males? Interesting point of reported cases: Review and case report

Hematoma of the ligamentum flavum (LF) is a rare cause of neural compression and sciatica. Currently, the etiology and epidemiological characteristics of ligamentum flavum hematoma (LFH) are unknown and epidemiological investigations using rewieving of reported cases have not been performed. We report the case of a 63-year-old man with a LFH compressing the spinal canal at the left L2-L3 level, rewieved relevant literature. In Medline research, wefound a total of 50 reported cases with LFHs, and the interesting point of these cases were analyzed. Many of cases were old males. Interestingly, 39 of the 50 cases were reported from Asian countries. The ages of 42 patients could be verified. The youngest age was 45 years, oldest age was 81 years, and mean age was 66.07 years. Thirty-three out of these 42 patients (78.53%) were older than 60 years. An important aspect of the present review is to bring attention for occurrence in older Asian males. With an increasing number of elderly people in the general population, there is a need to investigate risk factors such as sexual gender, age, and geographic location for LFH

The Effect of Neuroscientists on the Studies of Autonomic Nervous System Dysfunction Following Experimental Subarachnoid Hemorrhage

WOS: 000500374200110PubMed: 31348206Objective: the autonomic nervous system dysfunctions following subarachnoid hemorrhage (SAH) are common in neurosurgical clinical practice. the aim of the study is to investigate the effect of Asian neuroscientists on the studies of autonomic nervous system dysfunction following experimental subarachnoid hemorrhage. Methods: A systematic search was conducted using the MEDLINE and Web of Science databases for studies pertaining to SAH and autonomic nervous system dysfunction. the searched terms contained "experimental subarachnoid hemorrhage,'' "autonomic nervous system,'' and "Ganglion.'' Results: There are many animal studies because the live human brain vessels cannot be used in investigations. the considerable efforts have been made to investigate the effect of SAH on the autonomic nervous system in laboratory animals. Seventy-four studies were published by various authors. Most of the articles came from Asian Countries 49 studies (66.2% of the total studies). the most preferred animals were rabbits (in 43 studies, 58.1% of the total studies). Conclusion: Asian neuroscientists published enormous contributions in SAH-related autonomic nervous system dysfunction. It was shown that there is a great interest of Asian neuroscientists for autonomic nervous system changes secondary to SAH

Transorbital Ultrasonographic Measurement of Optic Nerve Sheath Diameter for Intracranial Midline Shift in Patients with Head Trauma

INECIKLI, MEHMET FATIH/0000-0002-9796-8223; YAVASI, OZCAN/0000-0001-8641-7031; Kanat, Ayhan/0000-0002-8189-2877WOS: 000368229700043PubMed: 26485420OBJECTIVE: Measurement of the optic nerve sheath diameter (ONSD) by using sonography is a straightforward, noninvasive technique to detect an increased intracranial pressure, which can even be conducted at the bedside. However, the correlation between ONSD and intracranial midline shift has not been studied. METHODS: the authors performed a prospective, blinded observational study in an intensive care unit. Forty-five patients were divided into groups. of those, 19 patients had a midline shift, whereas 26 had no intracranial pathology or shift and served as control individuals. RESULTS: Spearman rank correlation coefficient of difference of ONSD and midline shift was 0.761 (P < 0.0005), demonstrating a significant positive correlation between patients with midline shift and control group. CONCLUSIONS: Despite small numbers and selection bias, this study suggests that bedside ultrasound may be useful in the diagnosis of midline intracranial shift by measurement of ONSD

Important aspect of hypoglossal nerve injury following gunshot wound; Can the clivus has a role? A case report

Kanat, Ayhan/0000-0002-8189-2877WOS: 000547674900001PubMed: 32654525Cranial nerve palsies after gunshot injury are not uncommon. We report the mechanism of isolated hypoglossal nerve paralysis caused by a gunshot. We report a 74 years old patient in whom a bullet entered through the right nostril and then ended up right occipital condyle. the only neurologic deficit was tongue deviation which resolved in one week. the bullet was not removed. the effect of clival slope may have an importance in this type of injury

First report of perforation of ligamentum flavum by sequestrated lumbar intervertebral disc

Kanat, Ayhan/0000-0002-8189-2877WOS: 000395857900013PubMed: 28250640Disc fragments are well known to migrate to superior, inferior, or lateral sites in the anterior epidural space, posterior epidural migrated lumbar disc fragments is an extremely rare disorder, 61 cases have been reported to date. However, there were no cases with perforated ligamentum flavum (LF). We report a different case with perforation of ligamentum ligamentum by disc fragment. To the best of our knowledge, this is the first report of perforation LF by a posterior epidural migrated sequester disc