Changes in vesicourethral function following laparoscopic hysterectomy versus abdominal hysterectomy

Comparison of the Effect of Laparoscopic and Abdominal Hysterectomy on Lower Urinary Tract Function, Vaginal Length, and Dyspareunia: A Randomized Clinical Trial

OBJECTIVES

The effect of hysterectomy on vesicourethral and sexual functions remains controversial. The primary objective of this study was to compare the effects of a laparoscopic hysterectomy and a total abdominal hysterectomy on lower urinary tract function. The secondary aims were to compare the two surgeries in terms of postoperative vaginal length and dyspareunia.

MATERIALS AND METHODS

This was a prospective randomized clinical study in which 292 women were assigned to either the laparoscopic hysterectomy (n = 146) or total abdominal hysterectomy (n = 146) groups. The vaginal length and urodynamic measurements were taken, and the patients were asked to grade the presence and severity of dyspareunia using a visual analog scale 3 weeks before and 12 weeks after the surgery. The relationship between the postoperative vaginal length and the incidence of dyspareunia was evaluated. The urodynamic procedures used included uroflowmetry and voiding cystometry to record the maximum flow rate (Q-max) and to assess the bladder capacity.

RESULTS

The preoperative vaginal length was similar between the groups, whereas the postoperative vaginal length was significantly longer in the laparoscopic hysterectomy group. When the 15 patients who developed postoperative dyspareunia were evaluated, no differences in the postoperative vaginal length were seen, but a significant difference in the change in the length of the vagina was found when compared with the other patients. No significant difference was found with regard to pre- and postoperative Q-max, bladder capacity, and change in bladder capacity between the study groups.

CONCLUSIONS

The change in the length of the vagina was much more remarkable after total abdominal hysterectomy, compared with laparoscopic hysterectomy. It seems that the Q-max and the bladder capacity increase after hysterectomies, regardless of the surgical type. Further prospective randomized comparative studies are warranted to ascertain whether laparoscopic hysterectomies cause less damage to the pelvic floor, compared with abdominal hysterectomies.

Modified prepubic TVT-obturator tape procedure versus the conventional method: a preliminary study

OBJECTIVE

To compare the efficacy and safety of the modified prepubic tension-free vaginal tape-obturator (PTVT-O) system procedure with the original TVT-O methods.

STUDY DESIGN

One hundred and ninety women with urodynamic stress incontinence (USI) were included in this study (93 cases in the TVT-O group and 97 in the PTVT-O group). Clinical assessments before and one year after surgery included urinalyses, 1-h pad tests, urodynamic studies, and a personal interview with the overactive bladder symptom score (OABSS) questionnaire.

RESULTS

There were no differences between the two groups in mean age, parity, menopausal status, mean operative time and subjective cure rates (P>0.05), but the efficacy of surgery (cure and improvement) in the PTVT-O group was significantly higher than that in the TVT-O group (P=0.038). Complication rates and visual analog scale (VAS) scores were found to be similar (P>0.05). OABSS decreased significantly after surgery in both groups (P<0.05) although all urodynamic parameters revealed no significant difference after both procedures (P>0.05).

CONCLUSION

Our modified procedure is a safe and effective treatment for female USI. It has an advantage over the original TVT-O with better surgical efficacy and comparable postoperative pain, although the follow-up times in this study are different.

Effect of laparoscopic hysterectomy on the vascularization of the lower urinary tract

INTRODUCTION

The aim of this prospective study was to evaluate the changes in the vascularization of the lower urinary tract following laparoscopic hysterectomy (LH).

METHODS

Seventy women undergoing LH not under the indication of a uterine myoma were included. All subjects underwent urinalysis, pelvic examination, and introital color Doppler ultrasonography and completed a urinary questionnaire before and 6 months after LH. One-hour pad tests and urodynamic studies were performed in clinically incontinent women pre- and postoperatively.

RESULTS

Evaluation of the Doppler velocimetric parameters of bladder neck and periurethral vessels before and after LH, including number of vessels, pulsatility index, systolic peak, and minimum diastole, revealed no statistically significant differences (p > 0.05). In addition, the prevalence of stress urinary incontinence (SUI) decreased significantly from 37.1% (n = 26) preoperatively to 17.1% (n = 12) postoperatively (p < 0.01). A total of 19 patients reported no further SUI following LH. Their urinary leakages on the pad tests had all <10 g before surgery. When we analyzed the data of the women reporting no further SUI (n = 19) and de novo SUI (n = 5) following LH, the changes in the pulsatility index also showed no significant difference from the pre-LH values (p > 0.05).

CONCLUSIONS

The results of our study suggest that LH has little impact on the blood flow of bladder neck and urethra. Although some women experienced relief of the symptoms of mild or de novo SUI after LH, this being unrelated to changes in the vascularization of the lower urinary tract.

A randomized comparison of vesicourethral function after laparoscopic hysterectomy with and without vaginal cuff suspension

STUDY OBJECTIVE

To compare vesicourethral function following laparoscopic hysterectomy (LH) with and without vaginal cuff suspension.

DESIGN

Prospective study (Canadian Task Force classification I).

SETTING

Tertiary teaching hospital.

PATIENTS

Sixty-eight women scheduled for LH randomly assigned to either LH without vaginal cuff suspension (LH group; n = 36) or LH with suspension (LHS group; n = 32).

INTERVENTION

All subjects received urinalysis, pelvic examination, Q-tip test, introital ultrasonography, and a urinary questionnaire before and 6 months after surgery.

MEASUREMENTS AND MAIN RESULTS

The prevalence of stress urinary incontinence (SUI) decreased significantly from 46.9% (n = 15) preoperatively to 18.8% (n = 6) postoperatively in the LHS group (p = .022), but this was not so in the LH group. Similarly, the mean straining urethral angle and the number of women exhibiting bladder neck (BN) hypermobility significantly decreased after surgery in only the LHS group (p <.05; p <.01, respectively). During straining, the postoperative position of the BN localized more dorsally (p <.01), and its ventral mobility decreased significantly (p <.01) in the LH group. In the LHS group, significant postoperative reduction was found in both ventral and caudal movements of the BN during stress (p <.01), causing a more cranial and dorsal position of the BN (p <.01).

CONCLUSION

Laparoscopic hysterectomy with cuff suspension strengthens the traction effect on the endopelvic fascia, reducing both BN mobility during stress and the chance of SUI. However, simply performing a cuff suspension is not adequate for the treatment of severe SUI.

The clinical and urodynamic effects of the tension free bladder neck sling procedure

This study evaluated the clinical and urodynamic findings before and after tension-free bladder neck sling (TBS) procedure with Prolene tape. We enrolled 32 women who underwent TBS for genuine stress incontinence without intrinsic sphincter deficiency or severe uterovaginal prolapse. All subjects received 1-h pad test, Q-tip test, multichannel urodynamic testing, introital ultrasonography, and the Bristol Female Lower Urinary Tract Symptoms Questionnaires before and 1 year after surgery. Of the 32 subjects 27 were cured of stress incontinence, two improved, and three failed. The incidence of irritative symptoms and incomplete bladder emptying were significantly lower after surgery. The mean urethral straining angle showed a significant decrease from 73.8 degrees preoperatively to 30.1 degrees postoperatively. At rest the postsurgical position of the bladder neck (BN) was localized more cranially. During straining both ventral and caudal mobility of the BN decreased significantly following TBS, causing a more cranial and dorsal position of the BN. Urodynamic parameters including functional urethral length, maximal urethral closure pressure, and pressure transmission ratio showed significant increases after surgery. TBS could decrease the hypermobility of the BN and restore the BN support to prevent urinary leakage during straining, instead of urethral obstruction. The subjective and objective cure rate of stress incontinence is 84%, similar to those results reported after retropubic urethropexy and tension-free vaginal tape procedure. It is also worth emphasizing that no postoperative urinary retention occurred, although the limited number of cases makes it hard to confirm the significance of findings over the retention rate of tension-free vaginal tape.

Effect of laparoscopic hysterectomy on bladder neck and urinary symptoms

OBJECTIVE

To assess the effect of laparoscopic hysterectomy (LH) on the mobility and position of bladder neck (BN) and urinary symptoms.

DESIGN

We assessed the BN and urinary symptoms of 151 patients by introital ultrasonography and questionnaires before and after LH.

SAMPLE

One hundred and fifty-one women who underwent LH from June 1999 to June 2001.

RESULTS

A significant decrease was noted in the number of women exhibiting one or more urinary symptoms from 81 (53.6%) preoperatively to 58 (38.4%) postoperatively (P < 0.01). The incidence of urinary frequency, mild stress incontinence and nocturia decreased significantly after laparoscopic hysterectomy (P < 0.01). Changes in other urinary symptoms following hysterectomy showed no statistical significance (P > 0.05). During straining, the postoperative position of the BN localised more dorsally (P < 0.01) and the ventral mobility of the BN decreased significantly following surgery (P < 0.05). There was no significant difference in the location of the BN with respect to the pubis at rest and during straining, in the cephalocaudal direction, before and after hysterectomy (P > 0.05).

CONCLUSION

Some patients experienced a substantial improvement of preoperative urinary symptoms following LH, partly as a result of a decrease in the hypermobility of BN.