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John W Petersen, Jing Liu, Yueh-Yun Chi, Melissa Lingis, R Stan Williams, Alice Rhoton-Vlasak, Mark S Segal, Kirk P Conrad
Various non-invasive methods are available to measure cardiac output (CO) during pregnancy. We compared serial measures of CO using various methods to determine which provided the least variability. Ten patients with spontaneous pregnancy had estimation of CO at baseline prior to becoming pregnant and at the end of the first and third trimesters. Echocardiographic data were used to estimate CO using the Teichholz method, Simpson's biplane method, and the Doppler determined velocity time integral (VTI) method...
April 2017: Physiological Reports
Nelson M Oyesiku
No abstract text is available yet for this article.
May 1, 2016: Neurosurgery
Hung Tzu Wen, Leila Maria Da Róz, Albert L Rhoton, Luiz Henrique Martins Castro, Manoel Jacobsen Teixeira
BACKGROUND: An extensive frontal resection is a frequently performed neurosurgical procedure, especially for treating brain tumor and refractory epilepsy. However, there is a paucity of reports available regarding its surgical anatomy and technique. OBJECTIVES: We sought to present the anatomic landmarks and surgical technique of the frontal lobe decortication (FLD) in epilepsy. The goals were to maximize the gray matter removal, spare primary and supplementary motor areas, and preserve the frontal horn...
February 2017: World Neurosurgery
Tara L Braun, Larry H Hollier
No abstract text is available yet for this article.
December 12, 2016: Journal of Craniofacial Surgery
Osamu Akiyama, Ken Matsushima, Abuzer Gungor, Satoshi Matsuo, Dylan J Goodrich, R Shane Tubbs, Paul Klimo, Aaron A Cohen-Gadol, Hajime Arai, Albert L Rhoton
OBJECTIVE Approaches to the pulvinar remain challenging because of the depth of the target, surrounding critical neural structures, and complicated arterial and venous relationships. The purpose of this study was to compare the surgical approaches to different parts of the pulvinar and to examine the efficacy of the endoscope as an adjunct to the operating microscope in this area. METHODS The pulvinar was examined in 6 formalin-fixed human cadaveric heads through 5 approaches: 4 above and 1 below the tentorium...
December 9, 2016: Journal of Neurosurgery
Kaan Yagmurlu, Sam Safavi-Abbasi, Evgenii Belykh, M Yashar S Kalani, Peter Nakaji, Albert L Rhoton, Robert F Spetzler, Mark C Preul
OBJECTIVE The aim of this investigation was to modify the mini-pterional and mini-orbitozygomatic (mini-OZ) approaches in order to reduce the amount of tissue traumatization caused and to compare the use of the 2 approaches in the removal of circle of Willis aneurysms based on the authors' clinical experience and quantitative analysis. METHODS Three formalin-fixed adult cadaveric heads injected with colored silicone were examined. Surgical freedom and angle of attack of the mini-pterional and mini-OZ approaches were measured at 9 anatomical points, and the measurements were compared...
November 18, 2016: Journal of Neurosurgery
João Luiz Vitorino Araujo, José C E Veiga, Hung Tzu Wen, Almir F de Andrade, Manoel J Teixeira, José P Otoch, Albert L Rhoton, Mark C Preul, Robert F Spetzler, Eberval G Figueiredo
OBJECTIVE Access to the third ventricle is a veritable challenge to neurosurgeons. In this context, anatomical and morphometric studies are useful for establishing the limitations and advantages of a particular surgical approach. The transchoroidal approach is versatile and provides adequate exposure of the middle and posterior regions of the third ventricle. However, the fornix column limits the exposure of the anterior region of the third ventricle. There is evidence that the unilateral section of the fornix column has little effect on cognitive function...
November 4, 2016: Journal of Neurosurgery
Jayson Rhoton, J Michael Wilkerson, Shruta Mengle, Pallav Patankar, B R Simon Rosser, Maria L Ekstrand
BACKGROUND: The affordability of smartphones and improved mobile networks globally has increased the popularity of geosocial networking (GSN) apps (eg, Grindr, Scruff, Planetromeo) as a method for men who have sex with men (MSM) to seek causal sex partners and engage with the queer community. As mobile penetration continues to grow in India, it is important to understand how self-presentation on GSN app is relevant because it offers insight into a population that has not been largely studied...
October 31, 2016: JMIR MHealth and UHealth
Satoshi Matsuo, Serhat Baydin, Abuzer Güngör, Koichi Miki, Noritaka Komune, Ryota Kurogi, Koji Iihara, Albert L Rhoton
OBJECTIVE A common approach to lesions of the pineal region is along the midline below the torcula. However, reports of how shifting the approach off midline affects the surgical exposure and relationships between the tributaries of the vein of Galen are limited. The purpose of this study is to examine the microsurgical and endoscopic anatomy of the pineal region as seen through the supracerebellar infratentorial approaches, including midline, paramedian, lateral, and far-lateral routes. METHODS The quadrigeminal cisterns of 8 formalin-fixed adult cadaveric heads were dissected and examined with the aid of a surgical microscope and straight endoscope...
October 7, 2016: Journal of Neurosurgery
J Michael Wilkerson, Pallav Patankar, Shruta Mengle Rawat, B R Simon Rosser, Kanjani M Shukla, Jayson Rhoton, Maria L Ekstrand
In this manuscript, we report lessons learned from our efforts to recruit Indian men and transgender women/hijras who have sex with men into an online cross sectional study. Between September 2013 and May 2014, we implemented a seven-phased recruitment strategy that included the use of online and offline strategies to enroll a total of 449 participants into an online survey about recent sexual behavior and various psychosocial measures. The phases were implemented sequentially and cost-per-eligible participant was calculated...
2016: International Journal of Sexual Health: Official Journal of the World Association for Sexual Health
Nash S Moawad, Estefania Santamaria, Alice Rhoton-Vlasak, Judith L Lightsey
Survivors of pelvic cancer treatment live with the ramifications of pelvic radiation for many years after their cure. Several options are available to preserve ovarian function and fertility in reproductive age women undergoing pelvic radiation. Laparoscopic ovarian transposition is an under-utilized, yet fairly simple surgical procedure to relocate the ovaries away from the radiation field. Although randomized-controlled trials on the outcomes of ovarian transposition are scarce, there is a growing body of evidence on the risks and benefits of this procedure, in terms of prevention of premature ovarian failure, and potentially preserving fertility...
January 1, 2017: Journal of Minimally Invasive Gynecology
Noritaka Komune, Satoshi Matsuo, Koichi Miki, Albert L Rhoton
OBJECTIVE The application of the endoscope in the lateral skull base increases the importance of the middle ear cavity as the corridor to the skull base. The aim of this study was to define the middle ear as a route to the fundus (lateral end) of the internal acoustic canal and to propose feasible landmarks to the fundus. METHODS This was a cadaveric study; 34 adult cadaveric temporal bones and 2 dry bones were dissected with the aid of the endoscope and microscope to show the anatomy of the transcanal approach to the middle ear and fundus of the internal acoustic canal...
September 2, 2016: Journal of Neurosurgery
Sara Deatsman, Terrie Vasilopoulos, Alice Rhoton-Vlasak
OBJECTIVE: Fertility declines as women age. Advancing maternal age increases pregnancy risks such as diabetes or hypertension. Studies suggest women are not aware of the risks of aging on fertility and pregnancy. The study objective was to assess women's knowledge of fertility and reproductive outcomes affected by aging. METHODS: Prospective IRB approved survey of women (n=94) attending an obstetrics and gynecology (OB/GYN) clinic. Data collected included demographics, pregnancy history, and knowledge of age-related fertility decline and pregnancy risks...
August 1, 2016: JBRA Assisted Reproduction
Ed Benzel
No abstract text is available yet for this article.
August 2016: World Neurosurgery
Jeffrey Sorenson
No abstract text is available yet for this article.
August 2016: Journal of Neurological Surgery. Part B, Skull Base
Jon H Robertson
No abstract text is available yet for this article.
August 2016: Journal of Neurological Surgery. Part B, Skull Base
Juan C Fernandez-Miranda
No abstract text is available yet for this article.
August 2016: Journal of Neurological Surgery. Part B, Skull Base
Michael J Link, Christopher S Graffeo
No abstract text is available yet for this article.
August 2016: Journal of Neurological Surgery. Part B, Skull Base
Bradford S Hoppe, Stephanie Harris, Alice Rhoton-Vlasak, Curtis Bryant, Christopher G Morris, Roi Dagan, Romaine C Nichols, William M Mendenhall, Randal H Henderson, Zuofeng Li, Nancy P Mendenhall
BACKGROUND: The present study investigates the impact of scatter dose radiation to the testis on ejaculate and sperm counts from treatment of prostate cancer with passive-scatter proton therapy. MATERIAL AND METHODS: From March 2010 to November 2014, 20 men with low- or intermediate-risk prostate cancer enrolled in an IRB-approved protocol and provided a semen sample prior to passive-scatter proton therapy and 6-12 months following treatment. Men were excluded if they had high-risk prostate cancer, received androgen deprivation therapy, were on alpha blockers (due to retrograde ejaculation) prior to treatment, had baseline sperm count <1 million, or were unable to produce a pre-treatment sample or could not provide a follow-up specimen...
January 2017: Acta Oncologica
Jeffrey Sorenson, Nickalus Khan, William Couldwell, Jon Robertson
The Rhoton Collection is an archive of Dr. Al Rhoton Jr.'s anatomical images and video lectures, as well as an anatomical reference. In an effort to maximize the educational impact of these teaching materials, web-based technologies are used to dynamically format this material for a variety of devices ranging from cellular phones to projectors. Surgical cases are cross-referenced to further enhance the usefulness of this collection, which is available at The features of the Rhoton Collection website are described in this article...
August 2016: World Neurosurgery
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