A magnet system for urethral closure in females

A, Grüneberger; G, Hennig; Bullemer, F

doi:10.1016/0141-5425(84)90051-7

Cited by 17 publications

(12 citation statements)

References 11 publications

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“…There are reports describing use in orthodontics, prosthodontics [11], otology for certain hearing aid uses involving sound transmission across the middle ear [12], endoscopic gastro-intestinal (GI) surgery as an aid in forming gastroenterostomies [13], and trans-hepatic choledochoenterostomy [14]. In urol- ogy there has been work on a device to enable magnetic urethral compression for stress incontinence [15]. Our application of magnetic technology to vascular anastomosis is a natural counterpart.…”

Section: Discussionmentioning

confidence: 96%

Clinical experience with the Ventrica distal anastomotic device in coronary surgery

Klima¹,

MacVaugh²,

Maringka³

et al. 2004

Minimally Invasive Therapy & Allied Technologies

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The surgical treatment of coronary artery disease is based on bypassing demonstrated lesions with autogenous vascular grafts. The operations have traditionally been invasive, complicated procedures requiring skillful microvascular surgical technique, cardiopulmonary bypass, and temporary cardioplegia. Ventrica, Inc. has developed a coupling device based on magnetic attraction which simplifies the connection of the graft to the coronary artery. Perceived advantages are shortened operating time, the need for less operative exposure, ease of use, versatility, and reliability. Use of the device is easily learned. It is a gentle technique which may be abandoned at any point without grossly noticeable consequence; the vessel remains apparently undamaged and remains suitable for hand-sewn anastomosis. Patient recovery is swift and acceptance high. Immediate operative results, pre-discharge angiograms and 6 month follow up angiograms are all favorable. The device is applicable to multiple graft operations, to all autogenous graft conduits, to end or sequential anastomoses, and to potentially all coronary vessels.

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Section: Discussionmentioning

confidence: 96%

Clinical experience with the Ventrica distal anastomotic device in coronary surgery

Klima¹,

MacVaugh²,

Maringka³

et al. 2004

Minimally Invasive Therapy & Allied Technologies

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“…Abb. 1, [1,2,3]). Zur Indikation des Verfahrens wurden die Rezidivharninkontinenz und die hypotone Urethra genannt [2].…”

Section: Diskussionunclassified

“…Es wurde im Tierversuch zunächst bei 16 Merinoschafen zur Anwendung gebracht. Hierbei wurde ein unphysiologisch hoher Druck auf die Harnröh-re von bis zu 120 cm H 2 O gemessen [1,7,8,9]. Nicht nur aus den Erfahrungen der originalen Burch-Methode ist bekannt, dass verstärkte Spannung bzw.…”

Section: Diskussionunclassified

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Magnetisches Harnröhrenverschlusssystem

Anding

Ahlen

Müller

et al. 2015

Urologe

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We report on a negative outcome after implantation of a magnetic urethral closure device, consisting of one part screwed into the pubic bone and one part as a vaginal cone, for the treatment of urinary stress incontinence grade III. Continence was never achieved for the patient. The urethra narrowed over time due to erosion and scarring and the patient started intermittent catheterization, because spontaneous micturition was not possible. The magnet was broken, the bladder neck was eroded, several fragments were found in the bladder, and numerous fragments were scattered throughout the small pelvis. Surgery consisted of removing most of the fragments, followed by bladder neck closure and suprapubic diversion.

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“…In 1983 Gru È neberger [7] elaborated the principles for using magnetic force to compress the urethra. Gru È neberger et al [8] then presented extracts from their studies and in 1994 Gru È neberger reported on 12 patients with recurrent incontinence after previous operations [9]. The patients were treated by colposuspension combined with the application of a magnet ®xed to the pubic bone.…”

Section: Introductionmentioning

confidence: 99%

A magnetic device for increasing the urethral resistance to flow: an experimental study in female dogs

et al. 2000

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Objective To test a new magnetic device for increasing the urethral resistance to¯ow in a dog model, and thus provide a potential mechanical device for the treatment of incontinence in women. Materials and methods The study comprised 12 female mongrel dogs; three dogs were used to study the effect on urethral resistance of inserting a vaginal magnet (control experiment) and ®ve were assessed in a urodynamic study. With the animals under general anaesthesia, the bladder and the urethra were exposed by a low midline incision. One magnet, embedded in a silicon layer, was placed on the anterior side of the urethra 3 cm distal to the bladder neck and ®xed with a few sutures. To increase the urethral resistance as required, a second magnet was inserted into the vagina and the device activated. Urethral pressure pro®les and leak-point pressures were recorded in the anaesthetized animals under resting conditions and after the urethra was compressed between the magnets. Recordings were also made after pharmacological blockade of the urethral musculature. In four additional dogs, chronic experiments were conducted to evaluate the effect of continuous compression of the urethra and the vaginal wall for 14 days. Results Urethral compression between the magnets resulted in a doubling of the maximal pressure in the proximal urethra and in a threefold increase of the leak-point pressure. After pharmacological denervation of the urethra the differences between the control pressures and those after activating the device were even greater, although not signi®cantly so. After 2 weeks of continuous compression of the vaginal wall and the urethra between the magnets there was no detectable tissue damage. Conclusion These results suggest that the magnetic device can ef®ciently increase urethral pressure and that prolonged compression caused no apparent damage to the urethra or vagina. It may therefore be a useful potential method of providing urinary continence in women.

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A magnet system for urethral closure in females

Cited by 17 publications

References 11 publications

Clinical experience with the Ventrica distal anastomotic device in coronary surgery

Clinical experience with the Ventrica distal anastomotic device in coronary surgery

Magnetisches Harnröhrenverschlusssystem

A magnetic device for increasing the urethral resistance to flow: an experimental study in female dogs

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