Nicolette E. Deveneau

Robotic Burch colposuspension: a surgical case and instructional video

Introduction and hypothesisThe Burch colposuspension is a well-studied and proven surgical treatment for stress urinary incontinence without intrinsic sphincter deficiency. The advent of the minimally invasive mid-urethral sling has given rise to diminished surgical experience in performing the Burch. Recent anti-mesh media and FDA notifications have caused patients to demand mesh-free surgery, resulting in an opportunity for the resurgence of the Burch procedure. The objective of this video is to demonstrate surgical technique and instruction for a robotic Burch colposuspension as well as recommendations for successful completion of the procedure. Additionally, the video reviews and illustrates pertinent surgical anatomy regardless of approach.MethodsThe patient is a 53-year-old woman who presented with symptoms of vaginal pressure, urinary incontinence, and constipation. She had symptoms and urodynamics consistent with mixed urinary incontinence without intrinsic sphincter deficiency and had been treated with antimuscarinics for overactive bladder. On examination she was found to have stage II prolapse. She desired surgical management of both her prolapse and stress incontinence.ConclusionRobotic Burch colposuspension can be completed in a safe and effective manner and should be considered as an option for patients in whom an anti-incontinence procedure is indicated and who are already undergoing robotic surgery.

Evaluation of surgical instrument handling on polypropylene mesh using scanning electron microscopy

Introduction and hypothesisTo evaluate the effect of surgical instruments handling on polypropylene mesh using scanning electron microscopy (SEM).MethodsWe applied different surgical instruments, including a few robotic ones, to pieces of polypropylene mesh. SEM was used to evaluate the morphological changes with this intervention.ResultsStraight hemostat, laparoscopic atraumatic grasper, laparoscopic needle driver, and robotic instruments (Bipolar forceps, Cadiere™ forceps, PK™ dissecting forceps and SutureCut™) were applied to the mesh. SEM images of tool-affected mesh regions in specimens handled by different instruments along with the images of intact mesh were obtained. Average mesh fiber diameters, as well as the average parameters characterizing instrument-affected regions, were measured. There was substantial widening of the fibers in specimens handled by hemostat or a needle holder. An elliptical but much longer and narrower tool marking with more surface roughness was observed in mesh handled by a grasper. A ∼25-μm-wide and ∼200-μm-long strap was split on one side from the core of the fiber caused by Cadiere™.ConclusionsThere are morphological changes to polypropylene mesh caused by instrument handling. These changes are different depending on the instrument used. These alterations vary from changes in the surface creating roughness of the fiber, compression of the mesh with narrowing of the fiber in at least one direction or actual splitting or pitting of the fiber. Since there are no data regarding the effect of these morphological changes to the ultimate functioning of the mesh, surgeons should minimize mesh handling by instruments.

Anatomical Relationships of Burch Colposuspension Sutures

Objectives The prevalent use of minimally invasive midurethral slings for the treatment of stress urinary incontinence in the last several decades has resulted in fewer Burch procedures being performed and diminished surgical experience in performing the Burch colposuspension. However, recent antimesh media has resulted in more patients requesting nonmesh anti-incontinence procedures and a subsequent need for surgeons to refamiliarize themselves with the Burch procedure and its relevant anatomy. The objective of this study was to evaluate the relationships of Burch sutures to surrounding neurovascular anatomic structures in the human cadaver. Methods The retropubic space of 11 unembalmed female cadavers was dissected, and a Burch procedure performed. The distance from the Burch sutures’ location through both Cooper’s ligament and the vagina to the obturator neurovascular bundle and external iliac vessels was measured. Results The mean distance from the most lateral stitch in Cooper’s ligament to the obturator bundle was 25.9 ± 7.6 mm and to the external iliac vessels was 28.9 ± 9.3 mm, and in some instances, these structures were less than 1.5 cm away. Conclusions The obturator bundle and external iliac lie, on average, within 3 cm of sutures placed during a Burch colposuspension. Knowledge of these anatomical relationships is valuable when dissecting the space of Retzius and placing sutures for a Burch to avoid injury.

The Effect of Lithotomy Position on Nerve Stretch: A Cadaveric Study

Objective The objective of our study was to design a method to measure nerve stretch in cadaveric subjects and then use the method to assess femoral nerve stretch in the lithotomy position with varying degrees of flexion and extension. Methods A university-based, cadaveric observational study of femoral nerve stretch was conducted. In 6 cadaveric subjects, femoral nerve near the inguinal ligament was dissected in each cadaveric subject. The nerve was marked, and digital images of the nerve were obtained in the supine position and lithotomy position in both flexion and extension. Distances were calculated using the ratio of pixels to millimeter specific for each image. The average distance for each set of images was then used to calculate the percent change from supine for each position. Results We were able to assess nerve stretch using photo-editing software. For extended position, all nerves showed some degree of stretch with the mean percent change in nerve length being 10.35%. For all other positions, most showed a decrease of nerve length. There was not a significant relation between degree of extension and stretch (Pearson r, P < 0.05). Conclusions Hip extension between 10 and 20 degrees consistently stretches the femoral nerve greater than 5%. The potential for femoral nerve stretch and avoiding hip extension should be considered when positioning a patient in lithotomy for surgical procedures.