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ORIGINAL RESEARCH |
From the Departments of Obstetrics and Gynecology, Universities of Graz, Vienna, and Innsbruck; and the Departments of Obstetrics and Gynecology, Bruck an der Mur Hospital, Bruck an der Mur, and Mödling Hospital, Mödling, Austria.
Address reprint requests to: Karl Tamussino, MD, Department of Obstetrics and Gynecology, University of Graz, Auenbruggerplatz 14, A-8036 Graz, Austria; E-mail: karl.tamussino @kfunigraz.ac.at.
| ABSTRACT |
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METHODS: Fifty-five gynecology units completed questionnaires on patients undergoing the tension-free vaginal tape operation. Information was collected on patient, surgical, and postoperative data.
RESULTS: A total of 2795 patients were entered. Overall, 773 patients (28%) had undergone previous surgery for incontinence or prolapse; 1640 (59%) tension-free vaginal tapes were performed as isolated operations, and 1155 (41%) were done in combination with other procedures. The median operating time for tension-free vaginal tapes alone was 30 minutes (range 10120). Of the isolated tension-free vaginal tapes, 727 (44%) were performed with local, 711 (43%) with regional, and 193 (12%) with general anesthesia. In patients undergoing tension-free vaginal tape only, postoperative bladder drainage was obtained with intermittent catheterization in 389 (24%) patients, an indwelling urethral catheter in 1032 (63%), and a suprapubic catheter in 143 (9%). The bladder perforation rate was 2.7% overall (n = 75) and higher in patients with than in those without previous surgery (4.4% compared with 2.0%, P = .01). There were four bladder perforations (3.3%) among the 120 patients with previous colposuspension. Most patients undergoing tension-free vaginal tape only were able to void the next day (range 0 to over 64). A total of 68 patients (2.4%) required reoperation for reasons related to the tape (39 to loosen, remove, or cut the tape, or to place a suprapubic catheter, 19 for hematoma, one for bowel injury).
CONCLUSION: The tension-free vaginal tape has become a frequently performed operation in Austria. There are considerable variations in clinical practice. The risk of bladder perforation was increased in patients with previous surgery. Severe complications were rare.
Ulmsten and Petros1 and Ulmsten et al2 described the concept of correcting stress urinary incontinence in women by placing a tape of mesh under the midurethra. According to their integral theory of stress urinary incontinence, this restores continence at the level of the pubourethral ligaments,13 not at the bladder neck as with most anti-incontinence operations. The original concept has since evolved into what is now known as the tension-free vaginal tape operation. The procedure uses a strip of polypropylene mesh and is commercially available as a kit from the Ethicon (Norderstedt, Germany) company. Local anesthesia can be used. The tape is not sutured in place, and placement is supposed to be without tension. Initial results47 and 3-year follow-up reports8,9 suggest success rates comparable with those of established operations.
The tension-free vaginal tape system has quickly gained popularity in Europe and elsewhere despite the absence of completed randomized trials comparing it with standard anti-incontinence operations. To date, over 150,000 tension-free vaginal tape sets have been sold worldwide, with more than 6700 in Austria alone by May 2001. In 1998, the Austrian Working Group for Urogynecology initiated a registry of tension-free vaginal tape procedures with the aim of assessing the use of the operation and complications during surgery and in the immediate postoperative period. We were also interested in how many procedures were performed in the primary setting, how many in patients with a history of surgery for incontinence or pelvic organ prolapse, and whether previous surgery is a risk factor for perioperative complications.
| MATERIALS AND METHODS |
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2 test. | RESULTS |
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| DISCUSSION |
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The registry also aimed to assess how tension-free vaginal tapes are performed in clinical practice. We found considerable variations, particularly with regard to methods of anesthesia and postoperative bladder drainage. Descriptions by Ulmsten and Petros1 and Ulmsten et al2,5,9 in the original publications emphasized the use of local anesthesia and intermittent catheterization. However, spinal or epidural blocks were the most frequently used methods of anesthesia in our survey, and the rate of indwelling urethral and suprapubic catheters was high, even in the patients who had no concomitant procedures. The two to three times increased rate of urinary tract infection in patients with inwelling catheters compared with those with intermittent catheterization argues for the use of the latter.
The bladder perforation rate in our series was 2.7% overall and significantly higher in patients with previous surgery for prolapse or incontinence. There were no reports of sequelae of bladder perforations in our survey. Adhesions in the retropubic space after colposuspension might be expected to be associated with a high bladder perforation rate, but the 3.3% rate in the 120 patients with a history of colposuspension was not higher than that in patients with a history of other urogynecologic operations. Of the six perforations (3.7%) in a series of 161 operations reported by Nilsson and Kuuva,7 four occurred in patients with previous retropubic surgery or radiotherapy to the pelvis and two in uncomplicated cases. Our bladder perforation rate was lower than the 3.8% in an analysis of 1455 patients from Finland (Kuuva N, Nilsson CG. A nationwide analysis of complications associated with the tension-free vaginal tape [TVT] procedure [abstract]. Neurourol Urodyn 2000; 19:3945). Perforation rates in other series, some of which included only patients without previous surgery, range from 0%1,2,8 to 9% ( Ward KL et al. Neurourol Urodyn 2000;19:3868).
The reoperation rate for problems related to the tension-free vaginal tape procedure was 2.4%. Postoperative voiding dysfunction was the most common reason for reoperation. Thirty tapes were loosened, cut, or removed, and nine suprapubic catheters were placed secondarily. Nineteen patients (0.7%) required laparotomy for control of bleeding or evacuation of hematomas because of the tension-free vaginal tape operation. The Finnish series reported three reoperations (0.2%) for hematoma. Injury to vessels in the retropubic space or further laterally is a small but real risk with an operation that involves passing sharp 5-mm needles behind the symphysis. Case reports on bleeding complications in connection with the tension-free vaginal tape operation have begun to appear.10,11 One small bowel injury occurred in our series, and a similar case has been published ( Brink DM. Bowel injury following insertion of tension-free vaginal tape [letter]. S Afr Med J 2000;90: 4501). Both these patients did well. The death in our series, of a patient who died of multiorgan failure 46 days after radical resection of recurrent vulvar cancer, was probably not caused by the concomitant placement of the tension-free vaginal tape.
The lengthy postoperative stay in our series (5 days overall and 3 days for patients undergoing a tension-free vaginal tape without concomitant procedures) is a result of the health care system in Austria, in which keeping hospital beds filled is still as important as reducing lengths of stay. In a series from Finland,7 103 (80%) of 161 women undergoing tension-free vaginal tape operations without other procedures were released from the hospital on the afternoon of the day of surgery.
A registry such as this has limitations.12 It cannot evaluate the indications for the procedure, how patients were evaluated before surgery, the expertise of the surgeon, medium-term or long-term complications such as pain or detrusor instability, or cure rates for stress incontinence. Nonetheless, our data show that the tension-free vaginal tape has rapidly become a widely performed operation in Austria for women with primary and recurrent stress incontinence and in conjunction with other operations. There are considerable variations in clinical practice, particularly with regard to anesthesia and postoperative bladder drainage, but major complications appear to be rare.
| Footnotes |
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Received February 26, 2001. Received in revised form June 18, 2001. Accepted July 5, 2001.
| REFERENCES |
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2. Ulmsten U, Henriksen L, Johnson P, Varhos G. An ambulatory surgical procedure for treatment of female urinary incontinence. Int Urogynecol J 1996;7:816.
3. Atherton M, Stanton SL. A comparison of bladder neck movement and elevation after tension-free vaginal tape and colposuspension. Brit J Obstet Gynaecol 2000;107: 136670.
4. Moran PA, Ward KL, Johnson D, Smirni WE, Hilton P, Bibby J. Tension-free vaginal tape for primary genuine stress incontinence: A two-centre follow-up study. BJU Int 2000;86:3942.[Medline]
5. Ulmsten U, Falconer C, Johnson P, Jomaa M, Lannér L, Nilsson CG, et al. A multicenter study of tension-free vaginal tape (TVT) for surgical treatment of stress urinary incontinence. Int Urogynecol J 1998;9:2103.
6. Wang AC, Lo TS. Tension-free vaginal tape. A minimally invasive solution to stress urinary incontinence in women. J Reprod Med 1998;43:42934.[Medline]
7. Nilsson CG, Kuuva N. The tension-free vaginal tape procedure is successful in the majority of women with indications for surgical treatment of urinary stress incontinence. Br J Obstet Gynaecol 2001;108:4149.
8. Olsson I, Kroon U. A three-year postoperative evaluation of tension-free vaginal tape. Gynecol Obstet Invest 1999; 48:2679.[Medline]
9. Ulmsten U, Johnson P, Rezapour M. A three-year follow-up of tension free vaginal tape for surgical treatment of female stress urinary incontinence. Br J Obstet Gynaecol 1999;106:34550.[Medline]
10. Vierhout ME. Severe hemorrhage complicating tension-free vaginal tape (TVT): A case report. Int Urogynecol J 2001;12:13940.
11. Zilbert AW, Farrell SA. External iliac artery laceration during tension-free vaginal tape procedure. Int Urogynecol J 2001;12:1413.
12. Horton R. Surgical research or comic opera: Questions, but few answers. Lancet 1996;347:9845.[Medline]
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