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Marlene M Corton

Publications and source records attributed to Marlene M Corton.

8 recordsLinked to original sources
PubMed2006

A comparison of an interactive computer-based method with a conventional reading approach for learning pelvic anatomy.

OBJECTIVE: This study was undertaken to assess the impact of interactive, computer-based versus conventional, paper-based format in student, resident, and fellow learning and retention of anatomy knowledge. STUDY DESIGN: Randomized longitudinal cohort design with scores repeated as pre-, post-, and follow-up tests. Subjects were randomly assigned to an anatomy module in computer-based (CD-ROM) format and 1 in paper-based format. A follow-up examination was administered 3 weeks after the posttest to evaluate retention of knowledge. Tests results were analyzed by using Student t tests and analysis of variance. RESULTS: Thirty-nine subjects completed all testing. Regardless of instructional method, pretest to posttest scores improved (P < .01), and posttest to follow-up test scores decreased among all levels of training (P < .01). Student satisfaction was highest with CD-ROM format. CONCLUSION: Improvement and retention of anatomy knowledge was not significantly different when comparing a new CD-ROM interactive approach with a traditional paper-based method.

Anatomy↗
PubMed2006

Anatomical path of the tension-free vaginal tape: reassessing current teachings.

OBJECTIVE: The objective of the study was to revisit the anatomical path of the tension-free vaginal tape and better describe its relationship to the perineal membrane and other important anatomic landmarks. STUDY DESIGN: Dissections of the anterior perineal triangle, periurethral, and retropubic spaces were performed in 24 unembalmed female cadavers following placement of the tension-free vaginal tape to identify the sling's relationship to the perineal membrane, periurethral muscles, and the arcus tendineus fascia pelvis. RESULTS: In 100% of specimens, the device passed cephalad to the perineal membrane. The urethrovaginal sphincter muscle was perforated in 2 of the specimens. The sling passed lateral to the arcus tendineus and perforated the pubococcygeus muscle in 6 (25%) of the cadavers. In the remaining 18 (75%) specimens, the mesh was medial to the arcus tendineus and penetrated the periurethral connective tissue. CONCLUSION: The assertion that the tension-free vaginal tape perforates the perineal membrane is incorrect.

Aged↗
PubMed2006

Vascular anatomy of the presacral space in unembalmed female cadavers.

OBJECTIVE: The purpose of this study was to characterize the vascular anatomy of the female presacral space (PSS) and to correlate findings to the abdominal sacrocolpopexy. STUDY DESIGN: Detailed dissections of the PSS were performed in 52 unembalmed female cadavers. RESULTS: The closest cephalad vessel to the mid sacral promontory (MSP) was the left common iliac vein (LCIV), mean distance 27 mm (9-52 mm). The closest vessel lateral to MSP was also the LCIV, mean distance 22 mm (9-35 mm). The average distance of the middle sacral artery and vein to the MSP was 4 mm (0-15 mm) and 7 mm (0-17 mm), respectively. The mean distance of the sacral venous plexuses to the MSP was 34 mm (4-86 mm). CONCLUSION: Anatomic location of the vascular boundaries and contents of the PSS is highly variable. Careful dissection and exposure of the anterior longitudinal ligament of the sacrum before suture placement should minimize potentially life-threatening vascular complications.

Aged↗
PubMed2005

Vascular anatomy over the superior pubic rami in female cadavers.

OBJECTIVE: The objective of the study was to characterize the vascular anatomy over the superior pubic ramus. STUDY DESIGN: Detailed dissections of the retropubic space were performed in 15 fresh female cadavers. Vessels crossing the superior pubic rami were inspected for width, course, communications, and relationship to the midline of the pubic symphysis and the obturator canal. RESULTS: Vessels 1 mm or greater in width connecting the obturator vessels and inferior epigastric or external iliac vessels were noted in 10 of 15 (66.7%) cadavers: 9 (60%) had veins, 5 (33.3 %) had arteries, and 4 (26.7%) had both. In all specimens, the vessels crossed over the superior pubic rami lateral to or at the level of the obturator canal, which was on average 5.4 cm from the midline of the pubic symphysis. CONCLUSION: Communicating vessels crossing the superior pubic rami were present in the majority of specimens. Understanding this anatomy should aid the surgeon in avoiding vascular complications.

Adult↗
PubMed2005

Appearance of the levator ani muscle in pregnancy as assessed by 3-D MRI.

OBJECTIVE: The purpose of this study was to describe levator ani (LA) anatomy in postterm nulliparas using 3-dimensional (3-D) magnetic resonance (MR). STUDY DESIGN: Nulliparas (n = 84) with uncomplicated, postterm pregnancies underwent an MR (4 mm slices, 0 gap) of the uterus and pelvis. LA volume and morphometry were assessed using 3-D post-processing software. RESULTS: LA insertion into the symphysis was visible in 93%, and the iliococcygeus muscle assumed a convex shape (arch) in the 92% of the 84 women. The LA shape was characterized as "U" in 53% and "V" in 47%. Mean LA volume was 13.5 (3.7) cm3. There was a positive association between LA volume and higher fetal station (P = .02) and increasing BMI (P < .001). However, no relationship between LA volume and station was found after adjusting for BMI. CONCLUSION: BMI was correlated with LA volume in postterm nulliparas. LA insertion into the symphysis and the iliococcygeus arch were well-preserved overall and morphometry was variable.

Adolescent↗
PubMed2004

Multiple vaginal wall cysts: diagnosis and surgical management.

BACKGROUND: Simple cysts of the female genital tract may become symptomatic and require surgical removal. CASE: A 20-year-old woman had complaints of a vaginal bulge, pelvic pressure, dyspareunia, and stress urinary incontinence. Two cystic masses were seen in the vagina. A magnetic resonance imaging scan revealed 2 additional larger cysts. Urodynamic evaluation was significant for stress incontinence at 200 mL and a Valsalva leak-point pressure of 51 cm H(2)0. The 2 smaller cysts were removed intact through a superficial incision. The larger cysts were intentionally ruptured and dissected out. Histologic examination revealed a low cuboidal or a ciliated columnar epithelium that stained positive with mucicarmine, consistent with müllerian origin. One year after surgical excision, the patient remained symptom free with no urinary incontinence and no recurrence of the cysts. CONCLUSION: Magnetic resonance imaging was useful in delineating the course and anatomic arrangement of the vaginal cysts, but more importantly, identified another cyst that was not readily apparent at physical examination.

Adult↗
PubMed2003

A comprehensive pelvic dissection course improves obstetrics and gynecology resident proficiency in surgical anatomy.

OBJECTIVE: This study was undertaken to evaluate the impact of a pelvic dissection course on resident proficiency in surgical anatomy. STUDY DESIGN: Over a 1-year period, residents attended a course consisting of pretesting and posttesting, lectures, and pelvic dissection. Tests results were analyzed using paired Student t test, analysis of variance, and Kruskal-Wallis statistics. RESULTS: Of 42 residents, 24 completed all testing (study cohort). On written and practical examinations, resident scores improved a median of 42% and 29% (both P<.0001). Postgraduate year (PGY) 2 demonstrated the greatest improvement on the practical and PGY-3s demonstrated the greatest improvement on the written. Baseline written and practical results discriminated PGY level (construct validity): PGY-2=PGY-3<PGY-4 on written pretest, PGY-2<PGY-3=PGY-4 on practical pretest. No difference between resident cohorts was seen in either posttest. CONCLUSION: Resident surgical anatomy proficiency is measurably improved by a comprehensive course.

Anatomy↗