SUMMARY: In recent years, the advancement of technology and the pursuit of time efficiency have increased people's interest in online shopping. Various models of helmets are preferred by motorcycle riders, including those that fully cover the face, only enclose the chin, or are half-faced. However, a common feature in all models is that the earlobes remain within the helmet. Anatomically, considering the possibility of changes in the structure of the auricle (pinna) due to helmet usage and the potential impact on the transmission of sound to the middle ear in the future, our study is designed to identify alterations that may occur in the earlobes of motorcycle couriers as a result of helmet use. Participants in our study were selected from individuals working as couriers. A total of 200 participants, comprising 100 individuals who regularly use helmets and 100 individuals who do not use helmets, were included based on voluntary participation. Individuals with a history of earlobe surgery or auricular anomalies were excluded from the study. The selection criteria for helmeted couriers included a minimum of five years of helmet usage. Morphometric measurements were conducted through a photometric method using a digital camera, which is an indirect measurement technique. The distance between the landmark points marked on the auricle and the attachment distance of the auricle to the head were calculated using the MB Ruler program. According to the statistical analysis of the morphometric data obtained, it was observed that the cymba concha height, as well as the width and height of the auricle, were significantly lower in both the right and left ears of couriers. As a result, it can be speculated that prolonged helmet usage may affect the cartilaginous structure of the ear, thereby altering the distance values between landmark points.

RESUMEN: En los últimos años, el avance de la tecnología y la búsqueda de la eficiencia del tiempo han aumentado el interés de las personas por las compras online. Los motociclistas prefieren varios modelos de cascos, incluidos aquellos que cubren completamente la cabeza, solo cubren la barbilla o cubren media cara. Sin embargo, una característica común en todos los modelos es que los lóbulos de las orejas permanecen dentro del casco. Anatómicamente, considerando la posibilidad de cambios en la estructura del pabellón auricular debido al uso del casco y el potencial impacto en la transmisión del sonido al oído medio, nuestro estudio está diseñado para identificar alteraciones que puedan ocurrir en los lóbulos de las orejas de los mensajeros en motocicleta como resultado del uso del casco. Los participantes en nuestro estudio fueron seleccionados entre personas que trabajaban como mensajeros. Se incluyó un total de 200 participantes, que comprendían 100 personas que usaban cascos regularmente y 100 personas que no usaban cascos, según la participación voluntaria. Se excluyeron del estudio las personas con antecedentes de cirugía del lóbulo de la oreja o anomalías auriculares. Los criterios de selección para los mensajeros con casco incluían un mínimo de cinco años de uso del casco. Las mediciones morfométricas se realizaron mediante un método fotométrico utilizando una cámara digital, que es una técnica de medición indirecta. La distancia entre los puntos de referencia marcados en la oreja y la distancia de unión de la oreja a la cabeza se calcularon utilizando el programa MB Ruler. Según el análisis estadístico de los datos morfométricos obtenidos, se observó que la altura de la concha de la oreja, así como el ancho y alto de la oreja, fueron significativamente menores tanto en el lado derecho como en el izquierdo de los mensajeros. Como resultado, se puede considerar que el uso prolongado del casco puede afectar la estructura cartilaginosa de la oreja, alterando así los valores de distancia entre puntos de referencia.

SUMMARY: Formaldehyde induces oxidative damage in hippocampal tissue and blood serum by suppressing antioxidant defenses and increasing lipid peroxidation. This results in damage to DNA, proteins, and lipids within cells, disrupting neuronal functions, and may even lead to cell death (apoptosis). Apoptosis occurs as a cellular response triggered by formaldehyde through various mechanisms, including mitochondrial dysfunction, oxidative stress, and DNA damage. Arbutus unedo L. (AUL), which is rich in antioxidants, represents a potential countermeasure. The aim of our study is to investigate the immunohistochemical and biochemical effects of AUL fruit extract (AUE) on apoptosis and oxidative stress induced by FA exposure in the rat hippocampus. The rats were divided into four groups: the experimental group (EG) received 20 mg/kg AUE by oral gavage and 10 ppm FA inhalation; the formaldehyde group (FG) received 10 ppm FA inhalation only; the sham group (SG) received 10 mg/kg AUE by oral gavage; and the control group (CG) underwent routine observation. Hippocampal tissue was isolated after blood sampling. A number of physical changes, such as yellowing of feathers and tail spots, were observed in FA-exposed groups. The biochemical analysis showed significant differences in brain-derived neurotrophic factor (BDNF), malondialdehyde (MDA), GSH (Glutathione) and nitric oxide (NO) levels between the groups. The AUE-treated groups had reduced MDA levels, suggesting a potential reduction in oxidative stress, along with lower apoptotic cell rates in caspase-3 assessments. The FG rats had lower BDNF levels than CG. The SG had the fewest apoptotic cells. All these findings indicate AUE's potential to mitigate neuron damage and reduce oxidative stress.

RESUMEN: El formaldehído induce daño oxidativo en el tejido del hipocampo y del plasma sanguíneo al suprimir las defensas antioxidantes y aumentar la peroxidación lipídica. Esto provoca daños en el ADN, las proteínas y los lípidos dentro de las células, alterando las funciones neuronales e incluso puede provocar la muerte celular (apoptosis). La apoptosis se produce como una respuesta celular desencadenada por el formaldehído a través de diversos mecanismos, incluida la disfunción mitocondrial, el estrés oxidativo y el daño del ADN. Arbutus unedo L. (AUL), rico en antioxidantes, representa una posible contramedida. El objetivo de nuestro estudio fue investigar los efectos inmunohistoquímicos y bioquímicos del extracto de fruta AUL (AUE) sobre la apoptosis y el estrés oxidativo inducido por la exposición a FA en el hipocampo de rata. Las ratas se dividieron en cuatro grupos: el grupo experimental (GE) recibió 20 mg/kg de AUE por sonda oral y 10 ppm de FA por inhalación; el grupo de formaldehído (GF) recibió sólo una inhalación de 10 ppm de FA; el grupo simulado (GS) recibió 10 mg/kg de AUE mediante sonda oral; y el grupo control (GC) se sometió a observación de rutina. Se aisló tejido del hipocampo después de una muestra de sangre. En los grupos expuestos a FA se observaron una serie de cambios físicos, como coloración amarillenta del pelaje y manchas en la cola. El análisis bioquímico mostró diferencias significativas en los niveles de factor neurotrófico derivado del cerebro (BDNF), malondialdehído (MDA), GSH (glutatión) y óxido nítrico (NO) entre los grupos. Los grupos tratados con AUE tenían niveles reducidos de MDA, lo que sugiere una reducción potencial del estrés oxidativo, junto con tasas de células apoptóticas más bajas en las evaluaciones de caspasa-3. Las ratas GF tenían niveles de BDNF más bajos que GC. El GS tenía la menor cantidad de células apoptóticas. Todos estos hallazgos indican el potencial del AUE para mitigar el daño neuronal y reducir el estrés oxidativo.

Abstract Recurrent Laryngeal Nerve (RLN) injury is a complication in neck surgery. The aim of this study is to evaluate the effect of primary suture repair with melatonin treatment on nerve regeneration after RLN damage. After the RLN damage, nerve repair was performed in the first and fourth groups. The third and fourth groups were given intraperitoneal melatonin therapy daily for six weeks. EMG was applied to all subjects and vocal cord movements were evaluated endoscopically. At the end of the sixth week, all subjects were sacrificed, and their larynx were examinedhistologically. Vocal cord paralysis (VCP) was observed in all subjects after RLN damage. In the sixth week, improvement was observed in the first and fourth group who underwent nerve repair, whereas none in the second and third group, who did not undergo nerve repair, improved. With EMG, the highest MUP was in the fourth group. Histologically, an increase in Schwann cells, a decrease in axon damage, and cytoplasmic vacuolization were in the fourth group. Myelin protein zero and Ki-67 staining were the most in the fourth group. In our study, laryngoscopic, electrophysiological and histopathological findings show that melatonin contributes to nerve healing but this could not translate into functional recovery. (RLN surgery damage weeks endoscopically week sacrificed examinedhistologically VCP (VCP improved Histologically cells Ki67 Ki 67 Ki-6 laryngoscopic recovery Ki6 6 Ki-

SUMMARY: Formaldehyde (FA), which is an indispensable chemical substance in anatomy and pathology, is a very harmful substance for living things. In our study, the purpose was to investigate the changes in behavior of rats exposed to subchronic formaldehyde with open field test. We divided 24 Wistar-Albino rats into 3 groups. The first group (n=8) was identified as the control group, and normal air breathing was ensured. Low-dose FA (mean 1 ppm) was inhaled in the second group, and high-dose FA (mean 10 ppm) was inhaled in the third group. FA exposure was done for 4 hours, 12 weeks, and 5 days a week. The rats were subjected to open field test during the first week and the last week of FA exposure. We observed significant decreases in the number of vertical movements and grooming in rats in the experimental group compared to the control group in the open field test (p < 0.05). We did not detect any significant differences in horizontal movements and defecation counts (p > 0.05). As a conclusion, we can argue that FA causes changes in the behaviors of rats regardless of dose and duration.

RESUMEN: El formaldehído (FA), una sustancia química indispensable en la anatomía y patología, pero es un elemento sumamente nocivo para todos los seres vivos., El objetivo de nuestro estudio fue investigar los cambios en el comportamiento de ratas expuestas a formaldehído subcrónico con prueba de campo abierto. Utilizamos 24 ratas Wistar-Albino divididas en 3 grupos. El primer grupo (n = 8) se identificó como el grupo de control y se aseguró una respiración normal de aire. En el segundo grupo se inhalaron dosis bajas de FA (media de 1 ppm) y en el tercer grupo se inhalaron dosis altas de FA (media de 10 ppm). La exposición a FA se realizó durante 4 horas, 12 semanas y 5 días a la semana. Las ratas fueron sometidas a una prueba de campo abierto durante la primera semana y la última semana de exposición a FA. Observamos disminuciones significativas en el número de movimientos verticales y acicalamiento en ratas en el grupo experimental en comparación con el grupo control en la prueba de campo abierto (p <0.05). No se observaron diferencias significativas en los movimientos horizontales y el recuento de defecaciones (p> 0,05). Como conclusión, podemos argumentar que la AF provoca cambios en el comportamiento de las ratas independientemente de la dosis y la duración.

SUMMARY: Formaldehyde (FA) is a toxic substance used frequently in the field of medicine as well as in many industrial areas. Especially people working in the field of anatomy, histology, and pathology are in high risk group because of the use of the FA. Studies showing the effects of FA on the cardiovascular system are few in number. The purpose of the present study was to investigate the effects of FA exposure, which we believe can cause oxidative stress, on the heart and aorta with various biochemical analyses. A total of 24 Wistar Albino rats were used in our study. We divided the rats into 3 groups as the Control Group (CG), the group exposed to low-dose FA (avg. 1 ppm) (DDG) Group, and the group exposed to high-dose FA (avg. 10 ppm) (YDG). At the end of the subchronic FA exposure, the blood samples, heart and aorta tissues of the rats were taken and subjected to biochemical analyses. As a result of the analyses, statistically significant differences were detected between CG (2.96?0.85 ng/mg), and HDG (2.08?0.77 ng/mg) in aortic tissues in TXNIP analysis (p<0.05). In heart tissues, significant differences were detected between CG (0.73?0.27 ng/mg) and LDG (1.13?0.22 ng/mg) (p<0.05). Statistically significant differences were also detected between CG (1.98?0.31 mM/ml) and YDG (2.43?0.31 mM/ml) in serum MDA analyses (p<0.05). It was shown that subchronic application of FA to LDG rats through inhalation had no effects on apoptosis markers in heart tissues. More studies are required to show FA toxicity and the mechanism of action of pathology on the cardiovascular system. We believe that our study will contribute to clarifying the roles of mild and subchronic exposure of FA in heart and aortic tissues in terms of oxidative stress risk.

RESUMEN: El formaldehído es una sustancia tóxica que se utiliza con frecuencia en el campo de la medicina, así como en muchas áreas industriales. Especialmente las personas que trabajan en el area de la anatomía, y patología se encuentran en el grupo de alto riesgo debido al uso de esta sustancia. Pocos son los estudios que muestran los efectos del formaldehído en el sistema cardiovascular. El propósito del presente estudio fue investigar a través de análisis bioquímicos, los efectos de la exposición a formaldehído, que podría causar estrés oxidativo, en el corazón y la aorta. Se utilizaron un total de 24 ratas Albinas Wistar. Dividimos a las ratas en 3 grupos: grupo control (GC), grupo expuesto a dosis bajas de AG (promedio 1 ppm) (DDG) y grupo expuesto a dosis altas de AG (promedio 10 ppm) (YDG). Al término de la exposición a FA subcrónica, se tomaron muestras de sangre, tejido cardíaco y aorta de las ratas y se sometieron a análisis bioquímicos. Como resultado de los análisis, se detec- taron diferencias estadísticamente significativas entre GC (2,96 ? 0,85 ng / mg) y HDG (2,08 ? 0,77 ng / mg) en los tejidos aórticos en el análisis TXNIP (p <0,05). En los tejidos cardíacos se detectaron diferencias significativas entre GC (0,73 ? 0,27 ng / mg) y LDG (1,13 ? 0,22 ng / mg) (p <0,05). También se detectaron diferencias estadísticamente significativas entre CG (1,98 ? 0,31 mM / ml) y YDG (2,43 ? 0,31 mM / ml) en los análisis de MDA en suero (p <0,05). Se demostró que la aplicación subcrónica de formaldehído a ratas LDG a través de la inhalación no tuvo efectos sobre los marcadores de apoptosis en los tejidos del corazón. Se requieren más estudios para demostrar la toxicidad de los AG y el mecanismo de acción de la patología en el sistema cardiovascular. Creemos que nuestro estudio contribuirá a aclarar las funciones de la exposición leve y subcrónica de formaldehído en los tejidos cardíacos y aórticos en términos de riesgo al estrés oxidativo.

Resumo Justificativa e objetivos: Avaliar as técnicas de injeção única e tripla no bloqueio infraclavicular, empregando-se acesso medial guiado por ultrassonografia, comparando-se o sucesso do bloqueio e a necessidade de bloqueios complementares. Método: O estudo incluiu 139 pacientes com indicação de cirurgia de membro superior eletiva ou de emergência. O Grupo T (n = 68 pacientes) recebeu bloqueio infraclavicular com técnica de injeção tripla e o Grupo S (n = 71), bloqueio infraclavicular com injeção única. Registrou-se o número de pacientes que necessitaram bloqueio complementar de nervo ou que apresentaram falha completa do bloqueio, o tempo de recuperação do bloqueio sensorial e as complicações precoces e tardias. Resultados: A taxa de sucesso do bloqueio infraclavicular, sem necessidade de bloqueio complementar de nervo, foi 84,5% e 94,1% para os Grupos S e T, respectivamente. No bloqueio infraclavicular foi necessário bloqueio de nervos periféricos distais em 8 e 3 pacientes dos Grupos S e T, respectivamente. Após a complementação, a taxa de sucesso do bloqueio foi 95,8% e 98,5% para os Grupos S e T, respectivamente. Os resultados não foram estatisticamente significantes. Imagem de septo impedindo a distribuição adequada do anestésico local foi claramente visualizada em quatro pacientes. A taxa de desconforto durante a realização do bloqueio foi estatatisticamente mais alta no Grupo T (p< 0,05). Conclusões: As técnicas de injeção única e tripla em bloqueio infraclavicular guiado por ultrasonografia com acesso medial não diferiram quanto à taxa de sucesso. A necessidade de bloqueio complementar foi maior com a técnica de injeção simples. A ocorrência de invólucro de fascia poderia justificar a distribuição inadequada do anestésico local ao redor dos fascículos do plexo.

Abstract Background and objectives: To evaluate the single-injection and triple-injection techniques in infraclavicular blocks with an ultrasound-guided medial approach in terms of block success and the need for supplementary blocks. Methods: This study comprised 139 patients who were scheduled for elective or emergency upper-limb surgery. Patients who received an infraclavicular blocks with a triple-injection technique were included in Group T (n = 68). Patients who received an infraclavicular blocks with a single-injection technique were included in Group S (n = 71). The number of patients who required supplementary blocks or had complete failure, the recovery time of sensory blocks and early and late complications were noted. Results: The block success rate was 84.5% in Group S, and 94.1% in Group T without any need for supplementary nerve blocks. The blocks were supplemented with distal peripheral nerve blocks in 8 patients in Group S and in 3 patients in Group T. Following supplementation, the block success rate was 95.8% in Group S and 98.5% in Group T. These results were not statistically significant. A septum preventing the proper distribution of local anesthetic was clearly visualized in 4 patients. The discomfort rate during the block was significantly higher in Group T (p < 0.05). Conclusion: In ultrasound-guided medial-approach infraclavicular blocks, single-injection and triple-injection techniques did not differ in terms of block success rates. The need for supplementary blocks was higher in single injections than with triple injections. The presence of a fascial layer could be the reason for improper distribution of local anesthetics around the cords.