The relationship between sphenoidal sinus and sella turcica morphometry in the Turkish population: a retrospective study.

PURPOSE: The anatomical position of the sphenoidal sinus (SS) is very important for neurosurgeons because of the transsphenoidal approach to the pituitary gland. Therefore, the aim of this study was to determine the volume and shape of the SS and its relationship with the morphometry of the sella turcica. METHODS: This study included CT images of 282 males and 258 females with a mean age of 50.52 years (range 18-75) who underwent head CT. The morphometric values of the sella turcica and the volume of the SS were measured on the included radiologic images. Measurements were made on the sagittal slice closest to the midline in T1 sequence. Morphometric measurements were made with Micro Dicom Viewers software program and volume measurements were made with ITK SNAP software program. RESULTS: In this study, 4 types of SS shapes were obtained in the whole population: amorphous, pentagonal, triangular and quadrilateral. The mean SS volume was 7055.88 mm3 in males and 5694.48 mm3 in females and a statistically significant difference was observed (p < 0.001). In addition, a statistically significant difference was found between the sexes in the width and surface area parameters of the sella turcica (p < 0.05). CONCLUSION: In this study, the morphometric relationship between the shape of the sinus sphenoidale and sella turcica was demonstrated between men and women. In particular, the shape of the sinus sphenoidale was found to be anthropometrically different between men and women in the Turkish population. It is hypothesised that the data obtained in our study will guide surgeons performing transsphenoidal approach.

Risk Factors Associated with Ascending Aortic Aneurysms and Aortic Elasticity Parameters in Children with a Bicuspid Aortic Valve.

Aneurysms of the ascending aorta are frequently found in patients with a bicuspid aortic valve (BAV). This study assessed the risk factors of ascending aortic aneurysms and aortic elasticity in children with BAV. The study included 66 patients with no history of transcatheter intervention or surgical procedure who had been diagnosed with isolated BAV. Echocardiographic, blood pressure, and pulse measurements were obtained for all patients. The BAVs were classified as described by Sievers et al. (J Thorac Cardiovasc Surg 133:1226-1233, 2007), and aortic elasticity parameters were calculated using various formulas. The patients were divided into groups with and without cusp fusion, aortic stenosis (AS), aortic regurgitation (AR), or mixed lesions; the groups were then compared. The mean patient age was 10.43 ± 3.91 years; 15%he patients had no AS or AR, 33% had both AS and AR, 17% had AS alone, and 35% had AR alone. The most common type of BAV was type 5, and the ascending aorta z-scores were higher in children with mixed lesions and without a cusp fusion. Aortic distensibility (AD) was significantly higher, and the stiffness index was significantly lower, in patients with an ascending aorta z-score > 4. The ascending aortic z-scores were higher in the no-fusion and mixed lesion (AS + AR) groups, especially those originating from post-stenotic dilation due to AS. The AD was increased in patients with an ascending aorta z-score > 4. Patients should thus be monitored closely for dissection risk, and preventive medical treatment should be started early in those with AS without cusp fusion.

Examination of the Tensile Strength of the Peroneus Longus Muscle.

INTRODUCTION: The peroneus longus tendon (PLT) is increasingly used as a tendon autograft in ligament and tendon reconstructions. The aim of this study is to evaluate the biomechanical properties of the PLT to assess its usability in frequently performed reconstructions. METHODS: Six fresh-frozen, below-knee cadavers with a mean age of 65 years, no previous surgical operation, and no history of chronic disease were used. PLTs were harvested, freed from muscle tissue, and prepared for tensile strength testing at a tensile force rate of 2 mm/min using a Shimadzu Autograph AG-IS 100 kN instrument (Shimadzu Corporation, Kyoto, Japan). RESULTS: The maximum tensile force varied between 600.7 N and 1131.313 N, with a median of 758.185 N. All tendons had diameters of 8 mm or more. The elongation at maximum force ranged from 9.0 mm to 16.0 mm, with a median of 14.0 mm. CONCLUSION: According to this study, PLT is a viable choice for surgeries involving autograft reconstruction. However, further clinical studies are needed to confirm its efficacy in reconstructive surgeries.

Experience with implantation of Select Secure® leads in paediatric patients.

Objective: In this study, we aimed to investigate the safety, feasibility and efficacy of Select Secure® lead in a pure paediatric cohort and to present our experience with implantation technique, complications, and acute and midterm performance of the lead.Method: From 2014 to 2020, 42 consecutive paediatric patients underwent a cardiac device implantation with Select Secure® lead system. Patient demographics, implantation technique, and locations, sensing and pacing characteristics, impedances and any complications at implant and follow-up were investigated.Results: The mean age and weight of patients were 11.2 ± 3.5 years and 34.7 ± 14.8 kg, respectively. A total of 78 Select Secure® leads were successfully implanted. All ventricular leads were successfully anchored to the right ventricular midseptum. Implantation procedures were uneventful in all patients. We showed that atrial and ventricular sensing, pacing thresholds, and impedance measurements did not change significantly and that adequate pacing parameters were achieved in our patients during a median follow-up period of 47 months (4 - 68). Atrial and ventricular sensing, pacing thresholds and impedance measurements remained almost the same during the study period.Conclusions: In this study, we found that the Select Secure® transvenous pacing system was safe and feasible in paediatric patients without any major complications and with very stable electrical performance in the acute and midterm period.

Exploration of Flexible Pes Planus as a Potential Risk Factor for Cardiac Pathologies in Pediatric Cases.

OBJECTIVE: The aim of this study is to investigate the relationship between flexible pes planus (FPP) and cardiac pathologies in pediatric patients, with a particular emphasis on hypermobility status. METHODS: Between January and June 2022, a retrospective screening was conducted on a total of 68 patients aged between 6 and 18 years who had been diagnosed with FPP. Eight patients were excluded from the study due to suspicion of connective tissue or neuromuscular diseases following systemic examinations conducted by a pediatric specialist. The included 60 patients underwent comprehensive cardiac examinations conducted by pediatric cardiology specialists and were evaluated through echocardiography (ECHO) as part of the study. Simultaneously, a control group of healthy individuals aged 6 to 18, without a diagnosis of pes planus (PP), was selected from those who applied for health reports for the purpose of obtaining sports licenses. Patients diagnosed with FPP were compared to a control group in terms of the presence of cardiac pathology. Furthermore, the Beighton Hypermobility Scores (BHSs) of patients diagnosed with FPP were compared based on the presence of cardiac pathology. RESULTS: A total of 60 patients (40 males, 20 females) diagnosed with FPP were included in the study, and a control group consisting of 453 healthy individuals (287 males, 166 females) was selected. The incidence of cardiac pathology in patients diagnosed with FPP (23.3%) was found to be significantly higher compared to the control group (7%) (p <0.01). The risk of cardiac pathology in patients diagnosed with FPP was determined to be four times higher compared to the control group (Odds ratio: 4 (1.993-8.046), p<0.01). Among patients with FPP, individuals who were found to have cardiac pathology had statistically significantly higher average BHSs compared to those without cardiac pathology (p: 0.043). CONCLUSIONS: Our study suggested that there may be a significant relationship between FPP and high cardiac pathology risk in pediatric patients. We observed a significant increase in the incidence of cardiac pathologies among patients diagnosed with FPP. Additionally, the presence of higher hypermobility scores among patients diagnosed with FPP suggests a potential connection between the two. In the evaluation of FPP in the pediatric population, it should be considered as a potential risk factor for cardiac pathologies and its potential association with hypermobility.

A pilot study: Can calcaneus radiographic image be used to determine sex and breed in cats?

This study examined whether radiographic images measurements of the calcaneus in cats are determinative of sex and breed. For this purpose, radiographic images of 70 cats (37 male and 33 females) of different ages (from one to 18 years) and different breeds (41 mix-breed, 18 Scottish Fold and 11 British Shorthair cats) without orthopaedic problems were used. Right tarsal joint radiographs of these orthopaedically healthy cats were taken. Four linear measurements and two angle values of the calcaneus were obtained from the radiographic images. The MANOVA result showed that the most determining factor between the three groups was the greatest width (p value = 0.001). Calcaneal body length, calcaneal greatest length and calcaneal shortest depth were higher in mix-breed cats. Calcaneal tuber length was higher in Scottish Fold cats. The only statistically significant difference between Scottish Fold and British Shorthair was in the calcaneal tuber length (p value = 0.04). In the comparison made between the sexes regardless of species, the linear measurements in males were higher than in females. It was determined that these parameters are statistically significant in terms of sex differentiation in cats. Dorsal and plantar calcaneal angles are not sex determinants in cats. The effect of age on other measurements was analysed by correlation test. However, the effect of age on the measurements was not statistically significant. Mix-breed cats were examined in four groups according to their colour (grey, black-white, yellow, tri-colour). No statistically significant difference was found between calcaneal measurements of cats with different skin colour genotypes. In this study, calcaneus measurements were both determinative between breeds and sexes in cats.

A stereological study on calculation of volume values regarding lumbosacral segments of quails.

In the study, total segment, grey matter and white matter volume values of lumbosacral segment of spinal cord in quails (Coturnix coturnix japonica) were stereologically examined. Regardless of sex, six adult quails were used as material. After the materials were perfused, they were dissected and their spinal cords were uncovered. Tissue samples were taken from each lumbosacral segment of spinal cord. After the tissue fixation process, 6-7 sections having a 5-µm thickness were separated in every 50th section as from the first section, where the tissue was seen, among tissue samples of each segment. These segments were stained with haematoxylin-eosin staining. They were photographed via a microscope. By using the Cavalieri's principle, the volume values of both the total segment, grey matter (GM) and white matter (WM) in each lumbosacral segment were separately calculated. All these calculations were performed by using SHTEREOM 1.5 program. As a result, total volume, grey matter and white matter volume values of lumbosacral segments and white matter/total volume, grey matter/total volume, and grey matter/white matter volume fractions were obtained.

A morphometric and stereological study on cervical spinal cord segment of goose.

In this study, volume density of white matter and grey matter areas of cervical segment of spinal cord in adult geese weighing 3-4 kg was examined using stereological methods. 10 geese were used as material without sex discrimination. All animals underwent perfusion with 10% buffered formaldehyde. Following the perfusion, animals were kept in 10% formaldehyde for 1 week. Geese were then dissected. Cervical area of spinal cord was revealed removing cervical spine. Tissue samples were obtained from each segment of cervical area. 5 µm thick cross-sections were taken from these tissue samples via microtome. Series of cross-sections were obtained by sampling in the ratio of 1/250 including 12 cross-sections from each cervical segment of every animal. Cross-sections were stained by haematoxylin eosin. They were photographed under microscope. Volume density (volume fractions) of both whole tissue and white matter and grey matter parts in each cervical segment of spinal cord were calculated using Cavalieri's Principle. In the study, total volume of cervical segment, volume of white matter and grey matter, and ratios of these volumes one another were assessed in goose.

Neuronal nitric oxide synthase immunoreactivity in ependymal cells during early postnatal development.

Neuronal nitric oxide synthase (nNOS) immunoreactivity was observed in ependymal cell layer of the central canal of spinal cord of neonatal rats (2-20 days old). Neuronal nitric oxide synthase immunoreactivity was present in postnatal day 2 and this immunoreactivity gradually disappeared by postnatal day 16. The progressive decrease in nNOS staining with the increasing postnatal age may suggest that nNOS staining paralleled the maturation of the central canal and may also suggest that nNOS activity plays a role in the development of the ependymal cells.