The Experts below are selected from a list of 54 Experts worldwide ranked by ideXlab platform
John O L Delancey - One of the best experts on this subject based on the ideXlab platform.
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magnetic resonance imaging of the levator ani with anatomic correlation
Obstetrics & Gynecology, 1996Co-Authors: Kris Strohbehn, James H Ellis, Judith A Strohbehn, John O L DelanceyAbstract:Objective To define in women the anatomy of the levator ani Muscle visible on magnetic resonance imaging (MRI) so these Muscles can be studied in women with prolapse or incontinence. Methods Multiplanar T1- and T2-weighted MRI was obtained of two female pelvic cadaver specimens, ages 25 and 33. One specimen was hemisected, with half sectioned in the axial plane and the other half in the coronal plane. The other specimen was sectioned in the coronal plane. Anatomic cross sections of these specimens were correlated with the cadaver MRI and MRI of living patients. One sagittal and two axial series of anatomic sections not imaged were also used for comparison. Results Serial sagittal and axial MRI demonstrates the pubovisceralis (“pubococcygeus”) Muscle as it originates from the pubic bone, passes alongside the urethra, vagina, and rectum, and then dorsal to the anorectum. Its Muscle bulk, attachment to the distal half of the vagina, and insertion between the internal and external anal sphincters can be seen on axial views. The origin of the Iliococcygeus Muscle at the arcus tendineus levator ani is seen in axial and coronal images. Coronal and sagittal images demonstrate the relative thickness and medial position of the pubovisceralis Muscle compared with the thin, diaphragm-like lateral Iliococcygeus Muscle. Conclusion Magnetic resonance imaging of the cadaver pelvis demonstrates the detailed anatomy of the levator ani Muscle. This is an important precursor to future research of the structure, bulk, and orientation of the levator ani in living women with prolapse.
Judith A Strohbehn - One of the best experts on this subject based on the ideXlab platform.
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magnetic resonance imaging of the levator ani with anatomic correlation
Obstetrics & Gynecology, 1996Co-Authors: Kris Strohbehn, James H Ellis, Judith A Strohbehn, John O L DelanceyAbstract:Objective To define in women the anatomy of the levator ani Muscle visible on magnetic resonance imaging (MRI) so these Muscles can be studied in women with prolapse or incontinence. Methods Multiplanar T1- and T2-weighted MRI was obtained of two female pelvic cadaver specimens, ages 25 and 33. One specimen was hemisected, with half sectioned in the axial plane and the other half in the coronal plane. The other specimen was sectioned in the coronal plane. Anatomic cross sections of these specimens were correlated with the cadaver MRI and MRI of living patients. One sagittal and two axial series of anatomic sections not imaged were also used for comparison. Results Serial sagittal and axial MRI demonstrates the pubovisceralis (“pubococcygeus”) Muscle as it originates from the pubic bone, passes alongside the urethra, vagina, and rectum, and then dorsal to the anorectum. Its Muscle bulk, attachment to the distal half of the vagina, and insertion between the internal and external anal sphincters can be seen on axial views. The origin of the Iliococcygeus Muscle at the arcus tendineus levator ani is seen in axial and coronal images. Coronal and sagittal images demonstrate the relative thickness and medial position of the pubovisceralis Muscle compared with the thin, diaphragm-like lateral Iliococcygeus Muscle. Conclusion Magnetic resonance imaging of the cadaver pelvis demonstrates the detailed anatomy of the levator ani Muscle. This is an important precursor to future research of the structure, bulk, and orientation of the levator ani in living women with prolapse.
Kris Strohbehn - One of the best experts on this subject based on the ideXlab platform.
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magnetic resonance imaging of the levator ani with anatomic correlation
Obstetrics & Gynecology, 1996Co-Authors: Kris Strohbehn, James H Ellis, Judith A Strohbehn, John O L DelanceyAbstract:Objective To define in women the anatomy of the levator ani Muscle visible on magnetic resonance imaging (MRI) so these Muscles can be studied in women with prolapse or incontinence. Methods Multiplanar T1- and T2-weighted MRI was obtained of two female pelvic cadaver specimens, ages 25 and 33. One specimen was hemisected, with half sectioned in the axial plane and the other half in the coronal plane. The other specimen was sectioned in the coronal plane. Anatomic cross sections of these specimens were correlated with the cadaver MRI and MRI of living patients. One sagittal and two axial series of anatomic sections not imaged were also used for comparison. Results Serial sagittal and axial MRI demonstrates the pubovisceralis (“pubococcygeus”) Muscle as it originates from the pubic bone, passes alongside the urethra, vagina, and rectum, and then dorsal to the anorectum. Its Muscle bulk, attachment to the distal half of the vagina, and insertion between the internal and external anal sphincters can be seen on axial views. The origin of the Iliococcygeus Muscle at the arcus tendineus levator ani is seen in axial and coronal images. Coronal and sagittal images demonstrate the relative thickness and medial position of the pubovisceralis Muscle compared with the thin, diaphragm-like lateral Iliococcygeus Muscle. Conclusion Magnetic resonance imaging of the cadaver pelvis demonstrates the detailed anatomy of the levator ani Muscle. This is an important precursor to future research of the structure, bulk, and orientation of the levator ani in living women with prolapse.
James H Ellis - One of the best experts on this subject based on the ideXlab platform.
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magnetic resonance imaging of the levator ani with anatomic correlation
Obstetrics & Gynecology, 1996Co-Authors: Kris Strohbehn, James H Ellis, Judith A Strohbehn, John O L DelanceyAbstract:Objective To define in women the anatomy of the levator ani Muscle visible on magnetic resonance imaging (MRI) so these Muscles can be studied in women with prolapse or incontinence. Methods Multiplanar T1- and T2-weighted MRI was obtained of two female pelvic cadaver specimens, ages 25 and 33. One specimen was hemisected, with half sectioned in the axial plane and the other half in the coronal plane. The other specimen was sectioned in the coronal plane. Anatomic cross sections of these specimens were correlated with the cadaver MRI and MRI of living patients. One sagittal and two axial series of anatomic sections not imaged were also used for comparison. Results Serial sagittal and axial MRI demonstrates the pubovisceralis (“pubococcygeus”) Muscle as it originates from the pubic bone, passes alongside the urethra, vagina, and rectum, and then dorsal to the anorectum. Its Muscle bulk, attachment to the distal half of the vagina, and insertion between the internal and external anal sphincters can be seen on axial views. The origin of the Iliococcygeus Muscle at the arcus tendineus levator ani is seen in axial and coronal images. Coronal and sagittal images demonstrate the relative thickness and medial position of the pubovisceralis Muscle compared with the thin, diaphragm-like lateral Iliococcygeus Muscle. Conclusion Magnetic resonance imaging of the cadaver pelvis demonstrates the detailed anatomy of the levator ani Muscle. This is an important precursor to future research of the structure, bulk, and orientation of the levator ani in living women with prolapse.
S. A. Shobeiri - One of the best experts on this subject based on the ideXlab platform.
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The anatomy of Trans-Obturator Posterior Anal Sling (TOPAS) and dynamics of potential mechanism of action
Techniques in Coloproctology, 2019Co-Authors: J. Alshiek, P. Rosenblatt, S. A. ShobeiriAbstract:Background The aim of this study was to investigate the course of the transobturator posterior anal sling and its relationship to anatomical structures. Methods The transobturator anal sling procedure was performed in four fresh-frozen pelvises. The pelvises were dissected and the structures adjacent to the sling and the course of the sling were identified and measurements obtained. Results The transobturator posterior anal sling was inserted 2 ± 0.5 cm posteriorly to the anus, and 2.5 ± 0.5 cm caudal to the coccyx under the levator plate at the level of the puborectalis Muscle. The tape was 3.5 ± 0.5 cm from the pubic symphysis and 2.3 ± 0.3 cm from the obturator canal at entry into the pelvic cavity. The tape passed 2.3 ± 0.3 cm inferior–medial to the obturator canal. At entry, the sling passed lateral to the ischiopubic ramus through the following structures: gracilis, adductor brevis, obturator externus, obturator membrane, and beneath the obturator internus Muscle. The sling traveled 2–3 ± 0.5 cm over the Iliococcygeus Muscle and perforated the Iliococcygeus fibers 0–2 cm medial to arcus tendinous levator ani. The posterior division of the obturator nerve was 2.8 ± 0.7 cm from the tape. The anterior division of the obturator nerve was 3.4 ± 0.8 cm from the tape. The device passed 1.1 ± 0.4 cm from the most medial branch of the obturator vessels. Conclusions The transobturator posterior anal sling travels mostly in the avascular area of the ischiorectal fossa and posterior to the puborectalis Muscle as intended.
