scholarly journals Ethnic variation in medial orbital wall anatomy and its implications for decompression surgery

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Minhui Amy Chan ◽  
Farah Ibrahim ◽  
Arjunan Kumaran ◽  
Kailing Yong ◽  
Anita Sook Yee Chan ◽  
...  
Keyword(s):  
Relative Position ◽  
Ethmoid Sinus ◽  
Decompression Surgery ◽  
Ethnic Variation ◽  
Sinus Wall ◽  
Orbital Wall ◽  
Mean Width ◽  
Significant Difference ◽  
The Mean ◽  
Medial Orbital Wall

Abstract Background To describe the inter-ethnic variation in medial orbital wall anatomy between Chinese, Malay, Indian and Caucasian subjects. Methods Single-centre, retrospective, Computed Tomography (CT)-based observational study. 20 subjects of each ethnicity, were matched for gender and laterality. We excluded subjects younger than 16 years and those with orbital pathology. OsiriX version 8.5.1 (Pixmeo., Switzerland) and DICOM image viewing software CARESTREAM Vue PACS (Carestream Health Inc., USA) were used to measure the ethmoidal sinus length, width and volume, medial orbital wall and floor angle and the relative position of the posterior ethmoid sinus to the posterior maxillary wall. Statistical analyses were performed using Statistical Package for Social Sciences version 25.0 (IBM, USA). Results There were 12 males (60 %) in each group, with no significant difference in age (p = 0.334–0.994). The mean ethmoid sinus length in Chinese, Malay, Indian and Caucasian subjects, using the Chinese as reference, were 37.2, 36.9, 38.0 and 37.4mm, the mean width was 11.6, 10.5, 11.4 and 10.0mm (p = 0.020) and the mean ethmoid sinus volume were 3362, 3652, 3349 and 3898mm3 respectively. The mean medial orbital wall and floor angle was 135.0, 131.4, 131.0 and 136.8 degrees and the mean relative position of posterior ethmoid sinus to posterior maxillary wall were − 2.0, -0.2, -1.5 and 1.6mm (p = 0.003) respectively. Conclusions No inter-ethnic variation was found in decompressible ethmoid sinus volume. Caucasians had their posterior maxillary sinus wall anterior to their posterior ethmoidal walls unlike the Chinese, Malay and Indians. Awareness of ethnic variation is essential for safe orbital decompression.

scholarly journals Evaluating Endoscopic Ipsilateral Endonasal Corridor Approaches to the Anterolateral Wall of the Maxillary Sinus: A Computerized Tomography Study

2021 ◽  
Author(s):  
Navarat Vatcharayothin ◽  
Pornthep Kasemsiri ◽  
Sanguansak Thanaviratananich ◽  
Cattleya Thongrong
Keyword(s):  
Confidence Interval ◽  
Maxillary Sinus ◽  
Inferior Turbinate ◽  
Radial Access ◽  
Sinus Wall ◽  
Nasal Floor ◽  
Significant Difference ◽  
Anterolateral Wall ◽  
The Mean ◽  
Maxillary Sinuses

Abstract Introduction The endoscopic access to lesions in the anterolateral wall of the maxillary sinus is a challenging issue; therefore, the evaluation of access should be performed. Objective To assess the accessibility of three endoscopic ipsilateral endonasal corridors. Methods Three corridors were created in each of the 30 maxillary sinuses from 19 head cadavers. Accessing the anterolateral wall of the maxillary sinus was documented with a straight stereotactic navigator probe at the level of the nasal floor and of the axilla of the inferior turbinate. Results At level of the nasal floor, the prelacrimal approach, the modified endoscopic Denker approach, and the endoscopic Denker approach allowed mean radial access to the anterolateral maxillary sinus wall of 42.6 ± 7.3 (95% confidence interval [CI]: 39.9–45.3), 56.0 ± 6.1 (95%CI: 53.7–58.3), and 60.1 ± 6.2 (95%CI: 57.8–62.4), respectively. Furthermore, these approaches provided more lateral access to the maxillary sinus at the level of the axilla of the inferior turbinate, with mean radial access of 45.8 ± 6.9 (95%CI: 43.3–48.4) for the prelacrimal approach, 59.8 ± 4.7 (95% CI:58.1–61.6) for the modified endoscopic Denker approach, and 63.6 ± 5.5 (95%CI: 61.6–65.7) for the endoscopic Denker approach. The mean radial access in each corridor, either at the level of the nasal floor or the axilla of the inferior turbinate, showed a statistically significant difference in all comparison approaches (p < 0.05). Conclusions The prelacrimal approach provided a narrow radial access, which allows access to anteromedial lesions of the maxillary sinus, whereas the modified endoscopic Denker and the endoscopic Denker approaches provided more lateral radial access and improved operational feasibility on far anterolateral maxillary sinus lesions.

scholarly journals Sexual Dimorphism in Laryngeal Volumetric Measurements Using Magnetic Resonance Imaging

2019 ◽  
Vol 99 (2) ◽  
pp. 132-136 ◽  
Author(s):  
Abdul-Latif Hamdan ◽  
Elie Khalifee ◽  
Georges Ziade ◽  
Sahar Semaan
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Statistical Significance ◽  
Resonance Imaging ◽  
Men And Women ◽  
Mean Width ◽  
Significant Difference ◽  
The Mean ◽  
The Right ◽  
Volumetric Measurements

The objective of this study is to investigate the dimensional and volumetric measurements in the thyroarytenoid (TA) muscle in men and women using magnetic resonance imaging (MRI). The hypothesis is that there is a gender-related difference in these measurements. A retrospective chart review of 76 patients who underwent MRI of the neck at the American University of Beirut Medical Center was conducted. The dimension and volume of the right and left TA muscle were measured on axial and coronal planes short tau inversion recovery images. Male and female groups were compared with respect to demographic data and MRI findings using parametric and nonparametric tests. The mean length of the thyro-arytenoid muscle in males was larger than that in females on the right (males 2.44 [0.29] cm vs females 1.70 [0.22] cm) and on the left (males 2.50 [0.28] cm vs females 1.72 [0.24] cm) reaching statistical significance ( P < .001). The mean width of the thyro-arytenoid muscle in males was larger than that in females on the right (males 0.68 [0.13] cm vs females 0.59 [0.11] cm) and on the left (males 0.68 [0.12] cm vs females 0.57 [0.12] cm) reaching statistical significance ( P < .001). The mean height of the thyro-arytenoid muscle in males was larger than that in females on the right (males 1.05 [0.21] cm vs females 0.95 [0.12] cm) and on the left (males 1.05 [0.21] cm vs females 0.95 [0.12] cm) reaching statistical significance ( P < .01 on the right and P < .05 on the left). The volume of the thyroarytenoid muscle in males was larger than that in females on the right (males 0.86 [0.25] mL vs females 0.48 [0.15] mL) and on the left (males 0.89 [0.27] mL vs females 0.48 [0.17] mL) reaching statistical significance ( P < .001). The results of this investigation clearly indicate a significant difference in these measurements between men and women.

Frontonasal and Craniofrontonasal Dysplasia: Preoperative Quantitative Description of the Cranio-Orbito-Zygomatic Region Based on Computed and Conventional Tomography

1994 ◽  
Vol 31 (2) ◽  
pp. 97-105 ◽  
Author(s):  
Stephanie M Moffat ◽  
Jeffrey C. Posnick ◽  
Gaylene E. Pron ◽  
Derek C. Armstrong
Keyword(s):  
Computed Tomography ◽  
Clinical Presentation ◽  
Matched Control ◽  
Quantitative Description ◽  
Frontonasal Dysplasia ◽  
Orbital Wall ◽  
Computed Tomography Scans ◽  
Conventional Tomography ◽  
The Mean ◽  
Medial Orbital Wall

The unoperated cranio-orbito-zygomatic complex of 18 children (mean 4.7 years) with frontonasal dysplasia (FND) and 12 children (mean 1.1 years) with craniofrontonasal dysplasia (CFND) was quantified by 15 standard measurements performed on either computed tomography scans or facial tomograms. The results were compared with age-matched control values. In the FND group, the mean anterior interorbital and mid-interorbital distances were significantly increased at 148% and 118% of normal, and in the CFND patients, at 177% and 140% of normal. Excessive medial orbital wall protrusion (mean, 145% of normal in FND and 177% in CFND), shortened zygomatic arch lengths (mean, 94% of normal In FND and 91% in CFND), and reduced cephalic lengths (mean, 96% of normal in FND and 83% in CFND) were all observed. An expanded interzygomatic buttress distance was documented only in the CFND group, at 111% of normal. The clinical presentation of craniofacial deformities such as FND and CFND can be objectively described by a numerical analysis of the bony pathology.

scholarly journals Repair of a Medial Orbital Wall Fracture in the Ethmoid Sinus Using a Balloon Catheter.

1996 ◽  
Vol 89 (4) ◽  
pp. 449-453
Author(s):  
Mitsuru IGARASHI ◽  
Myojyo KANAJI ◽  
Shinji SUZUKI ◽  
Akihiko FUJITA
Keyword(s):  
Balloon Catheter ◽  
Ethmoid Sinus ◽  
Orbital Wall ◽  
Medial Orbital Wall

Cranio-Orbito-Zygomatic Measurements from Standard CT Scans in Unoperated Treacher Collins Syndrome Patients: Comparison with Normal Controls

1995 ◽  
Vol 32 (1) ◽  
pp. 20-24 ◽  
Author(s):  
Jeffrey C. Posnick ◽  
Mohammad M. Al-Qattan ◽  
Stephanie M. Moffat ◽  
Derek Armstrong
Keyword(s):  
Normal Values ◽  
Treacher Collins Syndrome ◽  
Ct Scans ◽  
Computed Tomographic ◽  
Cohort Group ◽  
Orbital Wall ◽  
The Mean ◽  
Medial Orbital Wall ◽  
Orbital Rim ◽  
Normal Controls

Fourteen reproducible cranio-orbito-zygomatic measurements taken from 26 standard axial computed tomographic (CT) scans of unoperated individuals with symmetric forms of Treacher Collins syndrome (TCS) were compared to age-matched controls. The interorbital measurements of the TCS patients were at the mean when compared to their cohort group (medial and lateral orbital wall separation), while the zygomatic measurements were significantly less than normal confirming the extent of malar hypoplasia. The congenitally deficient lateral aspect of the orbits in TCS patients was confirmed by the greater than normal values measured for globe protrusion and medial orbital wall protrusion in conjunction with the diminished lateral orbital wall lengths, all of which use the lateral orbital rim as a reference point. The abnormal shape of the anterior cranial vault in patients with TCS was documented as a diminished intercoronal distance (width) and decreased cephalic length when compared to normal age-matched controls.

Ethmoid silent sinus syndrome causing inward displacement of the orbit: case report

2009 ◽  
Vol 124 (2) ◽  
pp. 206-208 ◽  
Author(s):  
B McArdle ◽  
C Perry
Keyword(s):  
Case Report ◽  
World Literature ◽  
Trauma Surgery ◽  
Ethmoid Sinus ◽  
Silent Sinus Syndrome ◽  
Orbital Wall ◽  
Computed Tomography Scans ◽  
Significant Pathology ◽  
Ethmoidal Bulla ◽  
Medial Orbital Wall

AbstractObjective:We describe a previously unreported case of ethmoid silent sinus syndrome.Method:Case report and review of the world literature regarding silent sinus syndrome.Results:A 33-year-old woman developed medial displacement of the left orbital contents in the absence of trauma, surgery or other significant pathology. Imaging showed opacification of the left ethmoid sinus and implosion of the medial orbital wall. Previously reported cases of silent sinus syndrome have all involved the maxillary sinus, with subsequent implosion of the orbital floor. Computed tomography scans of our patient showed wide, flat ethmoidal bulla and surrounding cells, with few horizontal bony septae reinforcing the area of collapse.Conclusion:This case represents the first report of ethmoid silent sinus syndrome. We argue that, in anatomically susceptible individuals, the silent sinus syndrome can present due to chronic ethmoidal sinusitis.

scholarly journals Estimation of ventricles size of human brain by Magnetic Resonance Imaging in Nepalese Population: A retrospective study

2020 ◽  
Vol 13 (1) ◽  
pp. 45-50
Author(s):  
Sushma Singh ◽  
Bhoj Raj Sharma ◽  
Urusha Prajapati ◽  
Pujan Sharma ◽  
Manoj Bhatta ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Retrospective Study ◽  
Magnetic Resonance ◽  
Fourth Ventricle ◽  
Third Ventricle ◽  
P Value ◽  
Resonance Imaging ◽  
Mean Width ◽  
Significant Difference ◽  
The Mean

Background and Objective: Magnetic resonance imaging (MRI) provides image acquisition of three-dimensional data and measurement in any chosen imaging plane. Objective of this study is to assess the size of ventricles of the brain of normal Nepalese people and establish the range of size of the ventricular system and compute the ventricular dimensions among different age and gender. Materials and methods: This is a cross-sectional retrospective study done at Gandaki Medical College, Pokhara. A total of 106 MRI scan data of healthy individuals were collected over a period of seven months between March to September 2019. Patients ranged between eight and eighty years of age with 58 males and 48 females. Measurements of the mean of bifrontal diameter (BFD), bihemispheric diameter (BHD), third ventricle transverse dimension (TVTD), fourth ventricle antero-posterior dimension (FVAP), fourth ventricle width (FVW), and frontal horn ratio (FHR) were done. Result: The mean of BFD, BHD, TVTD, FVAP, FVW, and FHR were found to be 3.05 ± 0.10 cm, 10.11 ± 0.40 cm, 0.43 ± 0.11 cm, 0.90 ± 0.11 cm, 1.22 ± 0.12 cm, and 0.30 ± 0.01 cm, respectively. The mean width of fourth ventricle in males and females was observed to be 1.23 ± 0.12 cm and 1.19 ± 0.11 cm respectively. There was a significant correlation of TVTD, FVAP, FHR and BFD with age with Pearson correlation coefficient 0.393 (P value <0.01), 0.259 (P value <0.01), 0.34 (P value <0.01), and 0.219 (P value <0.05) respectively. However, BHD and FVW have no correlation with age. Conclusion: Third Ventricle Traverse Dimension, FVP, FVW and FHR show almost similar or slight difference in measurement according to gender. However, BFD shows larger difference in measurement according to gender. Similarly there is no such significant difference according to age in measurement of BFD, BHD, FVAP, FVW and FHR, while TVTD measurement shows slight increased measurement according to age.  

scholarly journals Pharmacokinetic Study of Amoxicillin Capsule in Healthy Bangladeshi Subjects using Urinary Excretion Data

1970 ◽  
Vol 8 (1) ◽  
pp. 53-59 ◽  
Author(s):  
Md Ashik Ullah ◽  
Mohammad Abul Kalam Azad ◽  
Rebeka Sultana ◽  
Eva Rahman Kabir ◽  
AHM Mahbub Latif ◽  
...  
Keyword(s):  
Urinary Excretion ◽  
Drug Disposition ◽  
Pharmacokinetic Analysis ◽  
Pharmacokinetic Parameters ◽  
Ethnic Variation ◽  
Open Label ◽  
Time Intervals ◽  
Significant Difference ◽  
The Us ◽  
The Mean

The aim of the study was to compare the urinary excretion data and bioavailability of two 500 mgamoxicillin capsules formulations in healthy Bangladeshi subjects under fasting condition and evaluate the ethnicvariations in drug disposition. Twenty-four subjects were enrolled into this single-dose, randomized, open-label, twowaycross over study. A washout period of one week was allowed between two treatments. Following oraladministration, urine samples were collected at different time intervals and were analyzed using a validated HPLCmethod with UV detection. The pharmacokinetic parameters for two formulations were calculated by noncompartmentalmethod using the software Kinetica and statistical analysis was done for the evaluation ofbioequivalence. The pharmacokinetic analysis indicated that the kinetic disposition of two formulations was similar.This was evident when the mean (± standard deviation) values of the various pharmacokinetic parameters werecompared. No significant difference between two formulations was found when analyzed by paired t-test andANOVA. Therefore it can be concluded that the test product (SK-mox®) is bioequivalent to the reference product(Amoxil-Bencard®) based on the US FDA's regulatory definition. Moreover, an ethnic variation was observedfollowing 64.34% cumulative urinary recovery of amoxicillin over 12 hours when compared with other studies.Key words: Amoxicillin; pharmacokinetics; Bangladeshi subjects.DOI: 10.3329/dujps.v8i1.5336Dhaka Univ. J. Pharm. Sci. 8(1): 53-59, 2009 (June)

scholarly journals The safety and efficacy of anterior versus posterior decompression surgery in degenerative cervical myelopathy: a prospective randomized trial

2020 ◽  
Vol 33 (3) ◽  
pp. 288-296
Author(s):  
Nasser M. F. El-Ghandour ◽  
Mohamed A. R. Soliman ◽  
Ahmed A. M. Ezzat ◽  
Amr Mohsen ◽  
Mostafa Zein-Elabedin
Keyword(s):  
Hospital Stay ◽  
Randomized Trial ◽  
Prospective Randomized Trial ◽  
Decompression Surgery ◽  
Postoperative Dysphagia ◽  
Posterior Decompression ◽  
Significant Difference ◽  
The Mean ◽  
Degenerative Cervical Myelopathy ◽  
Anterior Group

OBJECTIVEThe safety and efficacy of anterior and posterior decompression surgery in degenerative cervical myelopathy (DCM) have not been validated in any prospective randomized trial.METHODSIn this first prospective randomized trial, the patients who had symptoms or signs of DCM were randomly assigned to undergo either anterior cervical discectomy and fusion or posterior laminectomy with or without fusion. The primary outcome measures were the change in the visual analog scale (VAS) score, Neck Disability Index (NDI), and Nurick myelopathy grade 1 year after surgery. The secondary outcome measures were intraoperative and postoperative complications, hospital stay, and Odom’s criteria. The follow-up period was at least 1 year.RESULTSA total of 68 patients (mean age 53 ± 8.3 years, 72.3% men) underwent prospective randomization. There was a significantly better outcome in the NDI and VAS scores in the anterior group at 1 year (p < 0.05). Nurick myelopathy grading showed nonsignificant improvement using the posterior approach group (p = 0.79). The mean operative duration was significantly longer in the anterior group (p < 0.001). No significant difference in postoperative complications was found, except postoperative dysphagia was significantly higher in the anterior group (p < 0.05). There was no significant difference in postoperative patient satisfaction (Odom’s criteria) (p = 0.52). The mean hospital stay was significantly longer in the posterior group (p < 0.001).CONCLUSIONSAmong patients with multilevel DCM, the anterior approach was significantly better regarding postoperative pain, NDI, and hospital stay, while the posterior approach was significantly better in terms of postoperative dysphagia and operative duration.

Evaluation of mucosal surface reduction after ethmoidal surgery in nasal polyposis

2007 ◽  
Vol 121 (7) ◽  
pp. 1-4 ◽  
Author(s):  
P Bonfils ◽  
P Avan ◽  
P Palimi ◽  
D Malinvaud
Keyword(s):  
Computed Tomography ◽  
Maxillary Antrum ◽  
Lateral Wall ◽  
Ethmoid Sinus ◽  
Mucosal Surface ◽  
Sinus Wall ◽  
Lateral Ethmoid ◽  
The Mean ◽  
Upper Level ◽  
Ethmoid Sinuses

Objectives: To assess the reduction of mucosal surface after total sphenoethmoidectomy.Study design: Prospective study.Methods: Twelve normal, consecutive computed tomography scans were used. Computed tomography measurements were made at two different levels: the cribriform plate, and the upper level of the maxillary antrum. The length of the lateral wall of the ethmoid sinus and the perimeter of each ethmoid cell were measured at each level and on each side. The whole perimeter of the ethmoid sinus was evaluated for each CT scan level. For each side and each level, the ratio between the ethmoid sinus perimeter and the lateral ethmoid wall length was calculated.Results: The mean length of the lateral ethmoid sinus wall was 61.7±1.3 mm and 59.9±1.6 mm at the upper and lower parts of the ethmoid sinus, respectively. The mean ethmoid sinus perimeter was 263.2±11.5 mm and 250.4±11.1 mm at the upper and lower parts of the ethmoid sinus, respectively. No significant statistical difference was observed between measurements as a function of side (right or left) or level (upper or lower). The mean ratio between the ethmoid sinus perimeter and the lateral ethmoid wall length was 4.2.Conclusion: After total sphenoethmoidectomy, the mucosal surface of the ethmoid sinuses is reduced by a factor of 4.2; about 76 per cent of the mucosa is removed during total sphenoethmoidectomy.

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