Nose Type Research Articles

Anthropometric Study of Nasal Indices among the Akan People in the Assin Districts of Central Region, Ghana

Introduction: Nasal index (NI) may establish racial and ethnic identity and serves as a useful tool in forensic medicine and reconstructive surgery. Previous studies on nasal indices in many races and ethnicities serve as baseline and reference points for forensic and surgical purposes in those populations. However, there is scanty or no data on NI in Ghana including the Akan ethnicity. The study was conducted to provide baseline data on NI among the Akan people in the Assin Districts of the central region of Ghana. Materials and Methods: Four hundred adults between the ages of 20 and 58 years were used. Nasal height (NH) and nasal width (NW) were measured using Vernier caliper. NI computation and statistical analyses such as z-test and Pearson correlation were performed. Results: Mean NI of 91.32 ± 8.66 and 89.39 ± 10.16 were recorded in males and females, respectively, indicating that the predominant nose type in the study population is platyrrhine. There was a strong positive correlation between NH and NW, but there was no sexual dimorphism in NI among the Akan population. Discussion and Conclusion: This study provides a baseline data on NI anthropometry of the Akan people of the Assin Districts and will be a reference point for nasal anthropometry for clinical practice, rhinoplasty, and forensic science.

Peritonsillar Block with Triamcinolone as a Preemptive Analgesia in Tonsillectomy with Bipolar Electrocauter

Background: Tonsillectomy is one of the common types of ear, nose, and throat (ENT) surgery. Patients undergoing tonsillectomy frequently experience significant postoperative pain due to oropharyngeal muscle spasms and irritation of afferent nerve fibers. According to previous studies, triamcinolone for peritonsillar block was used to reduce postoperative pain in patients who have undergone tonsillectomy. The aims and objectives of this study were to observe the effectiveness of peritonsillar block using triamcinolone for reducing pain in patients with post-tonsillectomy using the bipolar electrocautery technique. Case: A 34-years-old male patient with chronic tonsillitis and obstructive sleep apnea (OSA) was undergoing tonsillectomy with general anesthesia and peritonsillar block after general anesthesia with triamcinolone 0,5 mg/kg body weight in the right and left fossa peritonsillar. Postoperative hemodynamic monitoring was carried out in the inpatient room. Patients were assessed for pain scale after tonsillectomy and side effects of triamcinolone, with pain indicator using the Wong-baker faces pain rating scale, numeric pain rating scale, and Face, legs, activity, cry and consolability (FLACC) Scale. Pain scales were assessed 1 hour after the tonsillectomy in the recovery room, 3 hours after the tonsillectomy in the inpatient room, 8 hours after the tonsillectomy in the inpatient room, 1 day after the tonsillectomy in the inpatient room, and 2 days after the tonsillectomy by phone. The patient went out of the hospital after 1 day of tonsillectomy. Conclusion: Peritonsillar block with triamcinolone is effective in reducing pain after tonsillectomy and can be the drug of choice when administering peritonsillar block.

A Morphometric Study of Nasal Index among Owo Indigenes of Ondo State, Nigeria

Objective: The purpose of this study was to investigate the morphometric characteristics of the nasal index among the Yoruba people of Owo, in Ondo State of Southern Nigeria, and to ascertain whether there is sexual dimorphism in their nasal characteristics.Methods: The study adopted the multistage, descriptive, cross-sectional survey design. A random sample of 130 males and 130 females between the ages of 18 – 55 years was taken.For each subject, the nasal height was measured and recorded as distance between nasion and subnasale while the nasal width was measured and recorded as distance between the most lateral points of right and left ala of the nose using a sliding digital caliper. Data obtained were analysed using both descriptive statistics (Mean and Standard deviation) and inferential statistics (t-test) to describe the nature of the data.Results: Data analyses showed that the mean nasal height was 42.34 ± 0.54 for males and 42.14 ± 0.56 for females and that the difference was statistically significant (p< 0.05). The mean nasal width was 40.77 ± 0.85 for males and 40.41 ± 0.42 for females and that the difference was statistically significant (p<0.05). The mean nasal index was 96.68 ± 2.91 for males and 95.43 ± 1.66 for females, and that the difference between both groups was statistically significant (p<0.05). Among the male respondents, 3.8%, 24.6% and 71.5%exhibited the Leptorrhine, Mesorrhine and Platyrrhine nose types, while for the female respondents, the respective proportions were 5.4%, 28.5% and 66.1% for Leptorrhine, Mesorrhine and Platyrrhine nose types.Conclusion: We observed sexual dimorphism in the nasal characteristics of Owo indigenes in Nigeria and the Platyrrhine type of nose was prevalent among them.International Journal of Human and Health Sciences Vol. 08 No. 02 Apr’24 Page: 165-169

Distribution of nose types among Igbos of South-East Nigeria

Background: The nose is an important aesthetic unit that is essential in defining the facial appearance of an individual and also helps in identifying a tribe or race. Understanding the distribution of nose types within the Igbo population is crucial for elucidating patterns of human diversity, population genetics, and evolutionary anthropology. The aims of this study were to determine some nasal parameters of Igbo adults, analyze the distribution of the types, check sexual dimorphism, and to correlate the parameters with age, height, weight and body mass index (BMI) respectively Materials and Methods: This was a descriptive cross-sectional study of 312 Igbos in Enugu of Southeastern Nigeria using cluster sampling. The nasal dimensions were measured with digital Vernier’s calipers and the nasal indices were calculated. Weight and height were also measured and BMI calculated. All data were collated and analyzed. Results: The mean age was 37.05 (±15.83). The age range was 20 to 69 years and they were grouped into 20 – 29 years group, 30 – 39, 40 – 49, 50 – 59 and 60 – 69 years groups. The range nasal height was 37.24 - 57.63mm for males, while range for females was 32.43 - 52.97mm. The range for nasal width was 37.04 - 51.29mm for males and 32.93 - 48.52mm for females. The mean nasal widths of males were significantly wider than those of females in all age groups respectively (p < 0.01). The mean nasal indices for males and females were 91.91 (platyrrhine) and 86.26 (platyrrhine) respectively. Majority of the sample population had platyrrhine nose (67%) while 32% of them had mesorrhine nose and only 1% of them had leptorrhine nose. There was a significant positive correlation between height of nose and width of nose of adult Igbos with their age, height and weight (p value <0.01) and a significant negative correlation with body mass index (p <0.01). Conclusion: This study provides valuable insights into the distribution of nose types among the Igbo people of South-East Nigeria. We have characterized the prevalence of different nose types and explored potential associations with demographic and anthropometric factors. The major nose type of Igbos is platyrrhine, while the minor one is mesorrhine. Knowledge of nasal parameters are applied in forensic studies; and in surgeries involving the nose, and this ensures that individuals do not lose their identities even after extensive nasal surgeries.

The Impact of the COVID-19 Pandemic on the Quality of Examination in Eye Clinics in the Czech Republic - Questionnaire Study.

The aim of the study was to map the behavior of ophthalmologists regarding protective equipment during the COVID-19 pandemic (coronavirus disease 2019), both during the time of the mandatory restrictive measures and after their relaxation. Another aim was to evaluate the awareness of ophthalmologists in the Czech Republic about the possible impact of nose and mouth protective measures (masks, respirators) on the quality of eye examinations, especially on the results of standard automated perimetry (SAP) and intraocular pressure (IOP) measurement. As part of two professional ophthalmological events in the Czech Republic, which took place in 2022, we obtained and evaluated data from the ophthalmologists in attendance using a questionnaire. We evaluated demographic parameters, frequency of use and type of nose and mouth protective equipment and their influence on the quality of ophthalmological examination as well as the awareness of ophthalmologists about their possible influence on the outcome of SAP and IOP measurements. We obtained data from a total of 212 respondents (148 women, 44 men, in 20 cases gender was not stated). In 91.5% of cases, ophthalmologists agreed that the use of respirators and masks makes ophthalmological examination more difficult. The most common problems were eyepiece fogging (85.8%), examination lens fogging (85.8%), and lens fogging when spectacles correction was prescribed (79.2%). The respondents most often combated these problems either by completely removing the respirator (24.1%) or at least by pulling it under the nose (39.2%). At the time when the measures were relaxed, significantly more men did not use any nose and mouth protection at all during ophthalmological examinations (15.8% of men vs. 4.2% of women; p = 0.032). An alarming finding was the fact that 35.6% of respondents did not know whatsoever whether the nurse was performing a perimetry examination on a patient with a respirator/mask or without protective equipment, i.e. they were not aware whatsoever of the possible formation of artifacts. Only 21.2% of respondents were aware of the possible difficulties of measuring IOP while wearing a respirator, while 59.9% of respondents were not aware of this risk (39.6% had never considered this problem, 20.3% of respondents were convinced that a respirator could not have an effect on the measurement of IOP). The use of nose and mouth protective equipment clearly affects the ophthalmological examination and makes it more difficult. Although ophthalmologists belong to a group at high risk for the possible transmission of infection in the performance of their profession, they often removed nose and mouth protection in an effort to eliminate fogging of eyepieces and examination lenses. The awareness of ophthalmologists regarding the possible influence on the results of SAP and IOP measurement by wearing a respirator was low in our questionnaire survey. It is therefore advisable to discuss this issue more widely and warn doctors about these risks.

Phytochemical Content, Anti-inflammatory, Anti-apoptotic, and Antioxidant Activities of Dwarf Elder (Sambucus Ebulus) Against Nasal Polyposis

Background: Sambucus Ebulus L. (SE) is known as an anti-inflammatory herb in traditional medicine. Nasosinusal polyposis is a common type of chronic nose and paranasal sinus inflammation. It is more common in patients with asthma and aspirin-exacerbated respiratory diseases. Objectives: This study aimed to investigate the apoptotic and anti-inflammatory effects of SE fruit extract on NP. Methods: The extract of SE fruit was prepared and subjected to total phenolic, anthocyanin, and flavonoid content measurement. The antioxidant activity was tested using the DPPH radical scavenging method. Nasal polyp (NP) tissue samples were collected from patients. Different concentrations of the SE extract were exposed to NPT samples for 24 hours. The expression of BAX and BAD proapoptotic markers, IL-5 and GM-CSF levels, and cell apoptosis were evaluated by real-time PCR, ELISA, and TUNEL assay, respectively. Results: The total phenolic and flavonoid contents of the extract were 38.44 (mg GAE/g extract) and 8.62 ± 0.12 (mg QE/g extract), respectively. Moreover, the total anthocyanin content was 0.56 ± 0.01 (mg C3GE/g extract). The IC50 of SE fruit extract in the DPPH radical scavenging assay was 190.78 ± 0.55 µg/mL. Also, BAX and BAD markers and TUNEL-positive cells were observed to increase in NP tissue samples in vitro after treatment with SE fruit extract (P < 0.05). The level of GM-CSF in the treated groups was reduced (P < 0.05). Conclusions: Our results showed that SE fruit extract was a good source of phenolic compounds that can induce anti-inflammatory and anti-apoptotic events in NP tissues, at least partly through increasing the expression of BAD and BAX apoptotic markers and reducing GM-CSF levels. The clinical applicability of SE fruit extract in the treatment of nasal polyps should be investigated in the future.

Numerical analysis of rubberized engineered cementitious composite (RECC) RC beams under impact loads

The environmental hazards of unrecycled rubber products and the current movement of developing more sustainable materials shed the light on utilizing recycled rubber as aggregates in concrete. The use of recycled scrab tire rubbers as aggregates in concrete can not only reduce environmental damages but also enhance the concrete’s dynamic mechanical properties such as an increase in the overall compression strain at failure and the material’s fracture energy. Previous research has investigated using rubber aggregates in concrete for reinforced concrete (RC) structural elements under static loads. However, this study aims to utilize the improved dynamic properties of concrete with rubber to resist impact loads on beams. This article presents a novel numerical investigation of the static and impact loading response of rubberized engineered cementitious composite (RECC) beams. A three-dimensional (3D) non-linear finite element (FE) model was constructed to analyze the behavior of conventional concrete (NC), crumb RECC, and powder RECC beams under impact loads. The study employs an accurate FE model that captures the non-linear behavior of RECC materials, including their properties in compression and tension, and the strain rate effect. Moreover, the strength and toughness of concrete beams can be improved by using a hybrid section of NC and RECC. Therefore, in the current study, the behavior of crumb or powder RECC layers in compression or tension sides of NC beams was studied under impact loads as well as the effect of low-impact energy, high-impact energy and the impactor nose type (hemispherical and flat-nose cylinder) on RECC beams. The outcomes of the FE model demonstrated good agreement with the available experimental results from the literature. The dynamic response of RECC beams was analyzed using FE model outputs, including time histories of impact forces, reaction forces, internal forces (shear force and flexural moment), mid-span displacements, and dissipated energy. Results indicated that RECC enhanced the performance of RC beams under impact loads. The tension performance of RC beams under impact loads was enhanced by using RECC on the tension side or in full depth since RECC limited flexural cracks and improved flexural capacity. In Comparison with NC Beams, the RC beams mid-span displacement was reduced and the energy dissipation capacity of concrete was improved when using RECC under low and high impact energies. CRECC on the compression side or in full depth improved the distribution of impact force on the NC and reduced compression damage.

Mesorrhine Type of Nose among Medical Students of a Medical College.

The nose is an attraction point in our face and one of the important sense organs of our body. The knowledge of the type of nose is essential for surgeons undertaking esthetic repair and reconstruction of noses The aim of this study was to find out the prevalence of the mesorhine type of nose among medical students of a medical college. A descriptive cross-sectional study was done among medical students of medical college after obtaining ethical approval from the Institutional Review Committee. Students of age groups 16-25 years from different religions with various castes/ethnicities were included. Those with craniofacial abnormalities, nasal deviation and a history of nasal trauma were excluded. All the nasal parameters were measured with the help of vernier's calliper and the nasal index was calculated. Convenience sampling method was used. The point estimate was calculated at a 95% Confidence Interval. Among 215 medical students, the prevalence of mesorrhine type of nose was 130 (60.46%) (53.92-67, 95% Confidence Interval). The prevalence of mesorrhine type of nose among medical students was similar to other studies done in similar settings. medical students; nose; prevalence; sexual dimorphism.

Anthropometric Measurements of the Nose and Nose Types

Background: In this study, the purpose was to obtain normal anthropometric data of the nose, and to determine the changes in age and gender. Materials and Methods: For this purpose, the nose anthropometric measurements were made with a caliper in 874 healthy individuals who were between the ages of 5 and 64, and the nose types were de-termined for adults. The individuals were divided into 8 groups as 5-7, 8-9, 10-11, 12-13, 14-15, 16-17, 18-40, and 41-64-year-old. The nasal length, nasal height, morphological nasal width, anatomical nasal width, nasal root width, nasal depth, lengths, nostril widths, face width, and face heights of the individu-als were measured; and the external nasal surface area, nasal volume, nasal index, nasofacial index, and nose-face width index were calculated. According to Martin and Sallar, the types of noses were classified in adults. The SPSS 20.0 Program was used for the statistical analysis of the data. Results: The most common type of nose was determined to be Mesorrhine. Statistically significant differ-ences were detected between the genders in all measurements except nasal depth. Statistically signifi-cant differences were detected in all groups in terms of all length and height measurements, morphologi-cal and anatomical nasal width values, external nasal surface areas, and nasal volume and indices. Conclusions: It is expected that detailed data about age-sex-related nose morphometry in our study will contribute to the creation of a database of our population. It is thought that these detailed data will be helpful in the determination of age and gender in forensic medicine, the reconstruction studies in anthro-pology, and the treatment plan and post-surgery evaluation to surgeons.

Morphometric Study of Nasal Parameters in Undergraduates at a Medical University in Central Uttar Pradesh

Abstract Background: Nasal morphometry is a technique which includes the study of a part, size, and shape of the human nose. The nasal index (NI), nostril shape, and philtrum shape are the parameters commonly studied. These may show variations according to regional, ethnic, and climatic differences. Hence, a study was done to calculate the NI among a subgroup and classify the nose type based on it. Also to assess the gender variations and to observe the nostril and philtrum shapes. Methodology: This was a cross-sectional study consisted of 210 undergraduate students at a medical university. The nasal height and nasal breadth were measured in centimeters with a Digital Vernier Caliper. Subsequently, the NI was calculated. Based on these nasal indices, the nose was classified into the following: leptorrhine: <70, mesorrhine: 70–84.9, and platyrrhine: >84.9. The nostril shapes (rectangular/triangular/teardrop/round) and philtrum shapes (triangular/parallel/flat/concave) were also observed. Results: The mean NI was 76.06 ± 8.614 with a range from 54.7 to 110. Mesorrhine variety was the most common type. The predominant shape of the nostrils found was rectangular, whereas the most common shape of the philtrum found was triangular. Conclusions: Nasal anthropometric measurements are a simple, reliable, and cost-effective method to study the facial characteristics among a population. These measurements provide guidelines that may play a crucial role in forensics and facial reconstructive procedures.

Nasofacial Morphometry of Ekpeye Tribe in Rivers State, Nigeria

Background: Nasofacial Anthropometry is concerned with the measurements of the proportions, size and shape of the human nose and face [1]. This study was aimed at investigating the nasofacial dimensions in Ekpeye tribe in Rivers state.
 Methods: Nasofacial parameters of 362 adults were measured using vernier calliper. The nasal length was measured as the distance between the nasion and the nasopinale; nasal width was measured as the distance between ala to ala. The morphological facial length was measured as the distance from the nasion to gnathion and morphological facial width was measured as the distance between right and left zygomatic arches.
 Results: Data obtained was analyzed using SPSS version 26.0 and Microsoft Excel 2013. The mean nasal index for the males was 95.03±17.31 while females presented with 91.04±10.39, this is statistically significant. The mean facial index for the males was 101.72±59.52 while females presented with 93.18±12.65.
 Conclusion: In this study, it was observed that the Ekpeye people have platyrrhine type of nose and Hyperleptoprosopic category of face. Hence the data in this study has provided anthropometric data for the Ekpeye people, which will be beneficial in forensic science and nasofacial reconstructive surgeries.

Deformable nose design for the non-penetrating projectile

This paper deals with the design of a deformable nose for the non-penetrating projectile in order to prevent its body deformation. Numerical, analytical and experimental studies have been carried out to analyze the effect of different nose shapes on the projectile deformation when it hits the brick wall. The projectile consists of an aluminum nose, a thin-walled steel cylinder body, and an end connector. This non-penetrating projectile can be used to carry a cargo that must reach its destination safely, for example in firefighting applications. To pursue this goal, the criterion utilized for the best design in this paper is stress and strain analysis. The geometric shape of the noses includes three types: type (a), type (b), and type (c). The first type of nose was flat shape. This nose was detached from the projectile by impact and did not prevent the projectile deformation. The second type of nose was a combination of flat and conical shapes. The projectile was also deformed by this nose. The third type of nose was a combination of flat, conical, and spherical shapes. Due to the maximum absorption of the impact energy, this type of nose prevented the deformation of the cargo and projectile.

Anthropometric Study of the Nasal Index of Adult Native of Ikwerre of Rivers State, Nigeria.

Background: The human nose differs in its anatomy and morphology among different ethnic groups. The nasal index is a vital measurement for classifying the ethnic groups and sex of an individual. The study aims at determine the nasal index of adult male and female Ikwerre natives in relation to age and to show its interest in forensic anthropology.
 Materials and methods: Three hundred and thirty subjects (160 males and 170 females) aged 20–59 years were recruited for this study. Nasal height and width were measured using a digital Vernier caliper. The nasal index was calculated as nasal width/nasal height ×100. 
 Results: The mean nasal index of females aged 20-29, 30-39, 40-49, and 50-59 years were 87.45±0.85, 94.69±1.30, 93.90±1.71, and 93.94±1.39 respectively. The mean nasal index of males aged 20-29, 30-39, 40-49, and 50-59 years were 94.22±0.8, 90.46±1.45, 90.24±1.10, and 99.46±1.68 respectively. The nasal index of overall males and females was 77.22±2.11 and 94.23±0.90 respectively. The higher nasal index was observed in males within the age groups 20–29 and 50–59 years, as compared to the females, who had a higher nasal index within the age groups 30-39 and 40–49 years. The result revealed sexual dimorphism. 
 Conclusion: This study showed that males in the Ikwerre ethnicity fall within the Mesorrhine nose type while females have the Platyrrhine nose type.

Comparative evaluation of various nasal shapes and angles in different vertical growth patterns – A Cephalometric Study

Background: Factors affecting the appearance of the nose and the size of the nasal angles are different. The aim of this study was to examine the influence of the vertical developmental pattern on the nose appearance. Material and methods: Lateral cephalogram from 144 adult Caucasian subjects from the central Balkan were analyzed (72 male and 72 female), with orthognathic jaw relationship - class I and different types of divergence pattern. The profile type of nose, the shape of the nasal dorsum and the value of the nasal angles (nasofrontal, nasofacial, nasolabial and nasal tip angle) were determined for each person. Subjects were divided into three groups based on the values of ANB angle (sagital relation between the maxilla and mandible), Wit's appraisal, SN/GoGn (the angle of mandibular divergence pattern). These groups are subjects with hypodivergent, normaldivergent and hyperdivergent growth pattern. Statistical analysis included differences separately for each gender between different types of divergence. Results: The results indicated that some nasal forms are more common in certain types of divergence, but that these differences did not show statistical significance, in contrast to the results of authors from other areas. Conclusions: The clinical implication of current study relates to the fact that nasal reconstruction should not be based on the type of divergence, but on other factors.

Improvements and challenges of tissue preparation for spatial transcriptome analysis of skull base tumors

BackgroundSpatial transcriptome (ST) provides molecular profiles of tumor cells at the spatial level, which brings new progress to the research of tumors and the tumor microenvironment. This study summarizes the experiences and lessons learned in the spatial section preparation of two different pathological types of nose and skull base tumors at our institution, with the aim of offering guidelines to researchers to avoid wasting precious samples and provide a basis for the application of ST in clinical practice. MethodsFrozen tissue blocks from patients with squamous cell carcinoma and adenocarcinoma of the nose and skull base diagnosed at our institution were prepared. The effects of different procedures and pathological tissue types on slide quality were explored and evaluated using RNA integrity number (RIN) and HE scores as criteria. The effects of different RIN values on ST sequencing data were explored. ResultsA total of 43 samples were obtained from 26 patients, including 22 with squamous carcinomas and 21 with adenocarcinomas. Thirteen samples with satisfactory RNA quality control and good histological morphology were sequenced for ST. Sample isolation time <15 min and abandonment of snap-frozen isopentane significantly improved RNA quality (p = 0.004, p < 0.0001) and histomorphological integrity (p = 0.02, p = 0.02). Selection of a suitable tissue RNA extraction kit was critical for RNA quality (p < 0.0001). No difference between 6 ≤ RIN <7 and RIN >7 in ST sequencing results was found, indicating that RIN ≥6 can be used as a criterion for qualified RNA quality control. Therefore, fresh tissues washed as soon as possible with cold PBS and then dried using OCT for snap freezing are currently the best method for preparing spatial sections of nose and skull base tumor tissues of different pathological types. ConclusionThis study is the first to investigate the feasibility of applying ST to different pathological types of nose and skull base tumors and to demonstrate the widespread application of ST in tumors. Rational optimization of spatial slide preparation procedures and exploration of individualized pre-sequencing protocols are used as the first stage to ensure the quality of spatial sequencing and lay the foundation for subsequent spatial analysis.

Influence of Proportions of the Nose on Aesthetic Score of an IndividualA Pilot Study

Introduction: Achieving an ideal dental, skeletal and appealing soft tissue adaptation and profile of the patient is of utmost importance postorthodontic treatment. The soft tissue profile is the key determinant of the aesthetics of the individual. Nose, being the centre of the face, plays a major role in determining the aesthetics. But, do morphological changes of the nose influence the perception of aesthetics? Aim: To assess if the proportions of the nose influence the aesthetics/aesthetic score of an individual. Materials and Methods: The present pilot cross-sectional study was conducted on 50 patients reporting to the Outpatient department at Saveetha Dental College and Hospitals, Chennai who were randomly selected to participate in this study. Calibrated anterior and right lateral profile view photographs as black and white images were taken. The basal alar width, length of the nose and the nasal index were calculated using software. Each photograph was also scored on a scale of 0-10 by 4 individuals on the basis of their perception of aesthetics to determine the aesthetic score. The obtained data was tabulated and statistically analysed using Pearson’s correlation method. Results: Mesorrhine type of nose was the most prevalent type of nose in the selected population. With Pearson’s correlation, a negative correlation that was statistically non significant (p-value &lt;0.05) was observed between nasal index and aesthetic score. Patients with leptorhinne type of nose have an increased aesthetic score than mesorrhine and platyrrhine type of nose. Conclusion: The type of nose does not influence the aesthetics of an individual. The divine or golden proportions are not the actual determinants of facial attractiveness and aesthetics. The golden proportions are one of the determinants of facial attractiveness and aesthetics.

Twisted Nose: Preservation Rhinoplasty with Modified Push-Down/Let-Down Technique.

The authors present a retrospective, comparative, and analytical cohort study, that aimed to prove the utility of unilateral or asymmetrical bony wedge resection to straighten the twisted nose as applied in let-down and push-down methods. The study involved objective angle measurements preoperatively and postoperatively on frontal view photographs. Preoperative and postoperative angle measurements were made on frontal view photographs of 78 patients with twisted noses classified as type C and type I. Angles of deviation were obtained using Scion Image software, measured in degrees. Statistical analysis was performed using Excel v15.13.3. Forty-two patients had twisted nose type C and 28 patients had twisted nose type I. The mean age was 19 years. There was an 81% improvement ratio for twisted nose type C and 79% for twisted nose type I, and the angle correction for each type of nasal deformity was statistically significant ( P < 0.01). The majority of postoperative results were classified as excellent to good, with the exception of four cases with bad outcomes, including two patients with type C and two with type I deviations. Unilateral or asymmetrical bony wedge resection is a modification of the let-down rhinoplasty technique. This study demonstrates statistically significant improvements in straightening twisted noses among patients with or without preoperative hump and preserving the nasal dorsum. The authors found this modification better suited for type C deviations. Therapeutic, IV.

Influence of edge enhancement applied in endoscopic systems on sharpness and noise.

.SignificanceFlexible endoscopes are essential for medical internal examinations. Digital endoscopes are connected to a video processor that can apply various operations to enhance the image. One of those operations is edge enhancement, which has a major impact on the perceived image quality by medical professionals. However, the specific methods and parameters of this operation are undisclosed and the arbitrary units to express the level of edge enhancement differ per video processor.AimObjectively quantify the level of edge enhancement from the recorded images alone, and measure the effect on sharpness and noise.ApproachEdge enhancement was studied in four types of flexible digital ear nose and throat endoscopes. Measurements were performed using slanted edges and gray patches. The level of edge enhancement was determined by subtracting the step response of an image without edge enhancement from images with selected settings of edge enhancement and measuring the resulting peak-to-peak differences. These values were then normalized by the step size. Sharpness was characterized by observing the normalized modulation transfer function (MTF) and computing the spatial frequency at 50% MTF. The noise was measured on the gray patches and computed as a weighted sum of variances from the luminance and two chrominance channels of the pixel values.ResultsThe measured levels were consistent with the level set via the user interface on the video processor and varied typically from 0 to 1.3. Both sharpness and noise increase with larger levels of edge enhancement with factors of 3 and 4 respectively.ConclusionsThe presented method overcomes the issue of vendors expressing the level of edge enhancement each differently in arbitrary units. This allows us to compare the effects, and we can start exploring the relationship with the subjectively perceived image quality by medical professionals to find substantiated optimal settings.

Classification of facial phenotypes in Asian patients with obstructive sleep apnea

Backgroud The facial phenotypes of Asian obstructive sleep apnea (OSA) patients remain unclear. Objectives (1) To describe the facial features of OSA patients. (2) To develop a model based on facial contour indicators to predict OSA. (3) To classify the facial phenotypes of Asian OSA patients. Materials and methods 110 patients with OSA (apnea-hypopnea index [AHI] ≥ 10/h) and 50 controls (AHI< 10/h) were selected to measure facial contour indicators. Indicators were compared between OSA patients and the control group. We used multivariable linear regression analysis to predict OSA severity and K-means cluster analysis to classify OSA patients into different phenotypes. Results We built a model to predict OSA which explained 49.1% of its variance and classified OSA patients into four categories. Cluster 1 (Skeletal type) had the narrowest facial width indicators with narrowing of the retroglossal airway. Cluster 2 (Obese type) had the widest face, and narrowest hard palate, retropalatal, and hypopharyngeal airways. Cluster 3 (Nose type) had the narrowest nasal cavity. Cluster 4 (Long type) had the longest airway length. Conclusions and significance Patients with OSA were classified into four categories, each of which identified different anatomic risk factors that can be used to select the treatment.

Three-Dimensional Rapid Printing-Assisted Individualized Total Nasal Reconstruction Based on a Database of Normal External Noses.

The nose is an unpaired facial structure. Applying three-dimensional rapid printing to total nose reconstruction is difficult because no paired structure is available for reference. In this study, three-dimensional laser scanning was used to create a database of normal external noses of Han Chinese individuals in East China to assist in total nose reconstruction. Three-dimensional laser scanning was used to create a database of normal external noses. Patients scheduled for nasal reconstruction had their measurements scaled according to head circumference and facial proportions to simulate a new reconstructed shape for the residual nose using this database. The personalized new shape was produced using rapid three-dimensional printing for preoperative evaluation and surgical design. In the database of external noses, the medium nose type was the main type among Han adults in East China (64.15 percent), followed by the narrow nose type (26.34 percent). Quantitative analysis showed that blood loss and operative times were lower in the study group than in the traditional surgery group ( p < 0.05). A postoperative nasal appearance satisfaction questionnaire showed that the appearance satisfaction rate, daily life measures, and perioperative comfort were significantly better in the study group ( p < 0.05). The database of external noses can bridge three-dimensional printing with total nasal reconstruction. The database has important clinical significance for optimizing the shape of the nose, reducing intraoperative blood loss, shortening the operative time, and improving patient satisfaction. This study provides new insight for the application of computer-guided three-dimensional scanning and rapid printing in organ reconstruction.