ORCID Profile
0000-0002-5986-6621
Current Organisation
University of Adelaide
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Publisher: BMJ
Date: 2021
Publisher: Elsevier BV
Date: 04-2018
Publisher: Wiley
Date: 2021
DOI: 10.1111/CEO.13890
Publisher: Elsevier BV
Date: 10-2023
DOI: 10.1016/J.JCJO.2022.05.004
Abstract: To determine normal globe position values, interzygomatic distance (IZD), and globe axial length and width on computed tomography in an Australian cohort. Retrospective cohort study. Patients who underwent computed tomography of the orbits. Patients with bilateral disease, previous orbital surgery, or poor scan quality were excluded. An axial slice through the midglobe was used to conduct the globe position measurements. Anterior globe position was defined as the perpendicular distance from the anterior globe margin to the interzygomatic line and posterior globe position as the perpendicular distance from the posterior globe margin to the interzygomatic line. The normal measurements (mean ± SD) were IZD, 97.4 ± 4.1 mm anterior globe position, 18.8 ± 2.8 mm posterior globe position, 6.2 ± 2.9 mm axial globe length, 24.9 ± 1.1 mm and axial globe width, 25.9 ± 1.2 mm. A significant positive correlation was seen between the IZD and the anterior globe position (r = 0.15, p = 0.03), axial globe length (r = 0.33, p < 0.01), and axial globe width (r = 0.30, p < 0.01). This normative globe position data may be used to diagnose radiologic exophthalmos or enophthalmos.
Publisher: Informa UK Limited
Date: 26-04-2022
Publisher: Elsevier BV
Date: 10-2022
Publisher: Springer Science and Business Media LLC
Date: 08-03-2022
DOI: 10.1007/S00276-022-02915-W
Abstract: Normative oblique muscle data may help to diagnose pathological enlargement of the oblique muscles. We aim to describe the normative values of the superior and inferior oblique muscles in an Australian cohort on T1-weighted MRI and fat suppressed contrast enhanced T1-weighted MRI. A retrospective review of patients who underwent 3 T orbital MRI. The healthy orbits were used to conduct measurements in patients with a unilateral orbital lesion. The maximum diameters of the superior and inferior oblique muscles were measured on coronal planes. The diameter was measured perpendicular to the long axis of the muscles. The normal measurements (mean ± SD) on fat suppressed contrast enhanced T1-weighted MRI: superior oblique, 3.0 ± 0.5 mm and inferior oblique, 2.7 ± 0.5 mm. On T1-weighted MRI: superior oblique, 2.8 ± 0.5 mm and inferior oblique, 2.5 ± 0.4 mm. In patients who had both sequences performed, the superior and inferior oblique diameters were significantly higher on the fat suppressed contrast-enhanced T1-weighted MRI than the T1-weighted MRI sequence ( p 0.01). Oblique muscle enlargement may be seen in a range of orbital diseases. These data may help in diagnosing oblique muscle enlargement. In addition, variations in the measured muscle diameters can be seen according to the scan sequence that is used.
Publisher: Informa UK Limited
Date: 02-03-2022
DOI: 10.1080/01676830.2022.2037143
Abstract: To determine the normal diameters of the extraocular muscles (EOMs) and optic nerve sheath complex (ONSD) and correlate with patient demographics in an Australian cohort. Consecutive patients who underwent contrast enhanced computed tomography (CT) orbits between December 2017 and March 2021 were included. Patients with bilateral disease, previous orbital surgery, or poor scan quality were excluded. Normal orbit was used in patients with unilateral orbital disease. Two hundred one orbits from 201 patients were included. Normal measurements (mean ± SD) were as follows: medial rectus (MR) 4.22 This normative data may be used to diagnose pathological enlargement of the optic nerve and extraocular muscles, including involvement of the oblique muscles.
Publisher: AMPCo
Date: 08-12-2020
DOI: 10.5694/MJA2.50888
Publisher: Springer Science and Business Media LLC
Date: 14-07-2022
DOI: 10.1007/S10792-022-02407-1
Abstract: We describe and compare the normative values of orbital structures in an Australian cohort on T 1-weighted MRI and fat-suppressed contrast-enhanced T 1-weighted MRI. Retrospective review of patients who underwent 3 T orbital MRI. The maximum extraocular muscle (EOM) and superior ophthalmic vein (SOV) diameters on normal orbits were recorded. The extraocular muscle diameters were summed to produce the sum of all muscles. The normal measurements (mean ± SD) from 141 orbits that had fat-suppressed contrast-enhanced MRI: medial rectus, 4.1 ± 0.5 mm lateral rectus (LR), 3.9 ± 0.7 mm superior muscle group (SMG), 4.5 ± 0.7 mm inferior rectus (IR), 4.6 ± 0.7 mm and SOV, 1.8 ± 0.7 mm. The normal measurement from 84 orbits that had T 1-weighted MRI: MR, 4.1 ± 0.5 mm LR, 3.4 ± 0.6 mm SMG, 4.3 ± 0.7 mm IR, 4.6 ± 0.7 mm SOV, 2.0 ± 0.7 mm. Eighty-four orbits had both MRI sequences performed. The LR, SMG and the sum of all muscles were significantly larger on fat-suppressed contrast-enhanced T 1-weighted MRI sequence than the T 1-weighted sequence ( P 0.01), whereas the SOV was significantly larger on the T 1-weighted sequence ( P 0.01). These data may aid in diagnosing pathological enlargement of the EOMs and SOV on different scan sequences.
Publisher: Springer Science and Business Media LLC
Date: 17-06-2022
DOI: 10.1007/S00417-022-05727-1
Abstract: Extraocular muscle enlargement can occur secondary to a range of orbital and systemic diseases. Although the most common cause of extraocular muscle enlargement is thyroid eye disease, a range of other inflammatory, infective, neoplastic, and vascular conditions can alter the size and shape of the extraocular muscles. Imaging with computed tomography and magnetic resonance imaging plays an essential role in the workup of these conditions. This article provides an image-rich review of the wide range of pathology that can cause enlargement of the extraocular muscles.
Publisher: Wiley
Date: 08-01-2019
DOI: 10.1111/JGH.14566
Abstract: Adenoma detection rate (ADR) is an important quality metric in colonoscopy. However, there is conflicting evidence around factors that influence ADR. This study aims to investigate the effect of time of day and endoscopist background on ADR and sessile serrated adenoma olyp detection rate (SSA/P-DR) for screening colonoscopies. Consecutive patients undergoing colonoscopy in 2016 were retrospectively evaluated. Primary outcome was the effect of time of day and endoscopist specialty on screening ADR. Secondary outcomes included evaluation of the same factors on SSA/P-DR and other metrics and collinearity of ADR and SSA/P-DR. Linear regression models were used for association between ADR, time of day, and endoscopist background. Bowel preparation, endoscopist, session, patient age, and gender were adjusted for. Linear regression model was also used for comparing ADR and SSA/P-DR. Chi-square was used for difference of proportions. Two thousand six hundred fifty-seven colonoscopies, of which 558 were screening colonoscopies, were performed. The adjusted mean ADR (screening) was 36.8% in the morning compared with 30.5% in the afternoon (P < 0.0001) and was 36.8% for gastroenterologists compared with 30.4% for surgeons (P < 0.0001). For every 1-h delay in commencing the procedure, there was a reduction in mean ADR by 3.4%. Using a linear regression model, a statistically significant positive association was found between ADR and SSA/P-DR (P < 0.0001). Morning and afternoon sessions and gastroenterologists and surgeons achieved the minimum standards recommended for ADR. Afternoon lists and surgeons were associated with a lower ADR compared with morning and gastroenterologists, respectively. Additionally, SSA/P-DR showed collinearity with ADR.
Publisher: Elsevier BV
Date: 11-2018
DOI: 10.1016/J.IJOA.2018.08.005
Abstract: There is no clear consensus about how best to prevent post-dural puncture headache (PDPH) following an accidental dural puncture in parturients. Our primary objective was to investigate whether the insertion of an intrathecal catheter following accidental dural puncture reduces the incidence of PDPH and therapeutic epidural blood patch. Anaesthetic records from January 2009 to December 2015 were reviewed retrospectively and parturients who had an accidental dural puncture and/or PDPH were identified. Data from those with a recognised dural puncture in whom an intrathecal catheter was inserted at the time of accidental dural puncture (ITC group) were compared to those without an intrathecal catheter (non-ITC group), as were outcomes of patients with an intrathecal catheter for ≥24 hours compared to <24 hours. Of 94 recognised accidental dural punctures, 66 were in the ITC group (37 for ≥24 h) and 28 in the non-ITC group. In the ITC group, 22 (33.3%) required an epidural blood patch in comparison to 19 (67.9%) in the non-ITC group (P <0.01, 95% CI 12.5 to 52.0). In the ITC group, 62 (93.9%) developed PDPH in comparison to 28 (100%) in the non-ITC group (P=0.186, 95% CI -6.55 to 14.57). Intrathecal catheter insertion for ≥24 h obviated the need for an epidural blood patch in 28 (75.7%) parturients, compared to 13 (59.1%) if <24 h (P=0.184, 95% CI -7.08 to 39.72). Inserting an intrathecal catheter after a recognised accidental dural puncture significantly reduced the need for an epidural blood patch.
Publisher: SAGE Publications
Date: 06-09-2023
Publisher: Elsevier BV
Date: 10-2020
No related grants have been discovered for Khizar Rana.