Meta-analysis using individual patient data from randomised trials to assess the effectiveness of laparoscopic uterosacral nerve ablation in the treatment of chronic pelvic pain: a proposed protocol

The efficacy of laparoscopic uterosacral nerve ablation (LUNA) in the treatment of unexplained chronic pelvic pain: a randomized controlled trial

The aim of this work is to explore the efficacy , safety, and patients' satisfaction of laparoscopic uterosacral nerve ablation (LUNA) in relief of pain in women with chronic pelvic pain in whom diagnostic laparoscopy reveals either no pathology or mild endometriosis (AFS score ≤5). The study was a prospective, single-blind, randomized trial with 12 months follow-up. It was conducted at the endoscopy unit of the Gynecology Department of El Minia University Hospital, Egypt. One hundred ninety Egyptian women consented to participate in the study. These eligible patients were randomized using computer-generated tables and were divided into two equal groups, including the control group (diagnostic laparoscopy with no pelvic denervation) and the study group (diagnostic laparoscopy plus LUNA). Diagnostic laparoscopy with or without laparoscopic uterosacral nerve ablation was done. There were no statistically significant difference between both groups regarding the efficacy and the overall success rate (between group I and group II, it was 77.64%, 76.47%, and 74.11% versus 79.06%, 75.58%, and 73.25% at 3, 6, and 12 months, respectively) and the cumulative patients' satisfaction rate (it was 74.11%, 74.11%, and 71.76% versus 75.58%, 75.58%, and 72.09% at 3, 6, and 12 months between group I and group II, respectively; P ≤ 0.05). There was no statistically significant difference between both groups as regards the effectiveness of LUNA in the treatment of primary (spasmodic) and secondary (congestive) dysmenorrhea (P ≤ 0.05), while there was a statistically significant difference between both groups in the treatment of dyspareunia (P ≥ 0.05). LUNA can be a last alternative option in well-selected patients for control of chronic pelvic pain without endometriosis; however, its effectiveness may not extend to other indications. Also, preliminary experience in the treatment of primary deep dyspareunia presents a promising perspective on the management of deep dyspareunia, especially if it will involve a team of social, psychological, and gynecological specialists.

Individual patient data meta-analysis of randomized evidence to assess the effectiveness of laparoscopic uterosacral nerve ablation in chronic pelvic pain

BACKGROUND

There have been conflicting results in randomized trials of the effects of laparoscopic uterosacral nerve ablation (LUNA) in chronic pelvic pain. Our objective was to perform a meta-analysis using individual patient data (IPD) to provide the most comprehensive and reliable assessment of the effectiveness of LUNA.

METHODS

Electronic searches were conducted in the Medline, Embase, PsycInfo and Cochrane Library databases from database inception to August 2009. The reference lists of known relevant papers were searched for any further articles. Randomized trials comparing LUNA with no additional intervention were selected and authors contacted for IPD. Raw data were available from 862 women randomized into five trials. Pain scores were calibrated to a 10-point scale and were analysed using a multilevel model allowing for repeated measures.

RESULTS

There was no significant difference between LUNA and No LUNA for the worst pain recorded over a 12 month time period (mean difference 0.25 points in favour of No LUNA on a 0-10 point scale, 95% confidence interval: -0.08 to 0.58; P = 0.1).

CONCLUSIONS

LUNA does not result in improved chronic pelvic pain.

Repetitive surgery for recurrent symptomatic endometriosis: what to do?

In spite of the increasing number of operative laparoscopies performed for endometriosis associated pelvic pain, postoperative symptomatic recurrences are very common. Reoperation is often considered the best treatment option, but the extent and duration of the effect of second-line surgery is still unclear. The best available evidence has been reviewed in order to define the results of repetitive conservative surgery, the effects of pelvic denervating procedures and postoperative medical treatments, as well as the long-term outcome of definitive surgery. Because of the paucity of published data, estimating the real risk of symptomatic recurrence and need for reoperation after repetitive conservative surgery for endometriosis is very difficult. Based on the limited information available, the long-term outcome appears suboptimal, with a cumulative probability of pain recurrence between 20% and 40%, and of a further surgical procedure between 15% and 20%. These figures are probably an underestimate related to drawbacks in study design, exclusions of dropouts, and publication bias and should be considered with caution. Systematic complementary performance of denervating procedures in addition to reoperation cannot be recommended, as only a few symptomatic patients complain of predominantly midline, hypo-gastric pain. The outcome of hysterectomy for endometriosis-associated pain at medium-term follow-up seems quite satisfactory. Nevertheless, about 15% of patients had persistent symptoms, and 3-5% experienced worsening of pain. Concomitant bilateral oophorectomy reduced the risk of reoperation due to recurrent pelvic pain by six times. However, at least one gonad should be preserved in young women, especially in those with objections to the use of oestrogen-progestogens. Medical treatment appears to have limited and inconsistent effects when used for only a few months after conservative procedures. Data on the benefit of prolonged drug regimens with oral contraceptives or progestogen are lacking. The risk of recurrence of endometriosis during hormone replacement therapy seems marginal if combined preparations or tibolone are used and oestrogen-only treatments are avoided. The opportune surgical solution in women with recurrent symptoms after previous conservative procedures for endometriosis should be based on the desire for conception as well as on psychological characteristics. Studies on surgical management of recurrent rectovaginal endometriosis are warranted, due to the peculiar technical difficulties as well as the high risk of complications associated with this challenging disease form.

Medical, surgical and alternative treatments for chronic pelvic pain in women: a descriptive review

Several causes of chronic pelvic pain (CPP) are recognised, but in many women a definite diagnosis cannot be made. Few randomised controlled trials on treatment of CPP have been conducted. In a Cochrane systematic review, only medroxy-progesterone acetate, counselling, a multidisciplinary approach and lysis of deep adhesions had a proven benefit. The aim of this descriptive review is to describe the management of CPP, which can focus on treating the pain itself, the underlying cause, or both. Combination drug therapy with medications with different mechanisms of action may improve therapeutic results. Pelvic denervating procedures should be indicated in selected circumstances, as the magnitude of the effect is undefined. Several alternative non-invasive treatments have been proposed including exercise programmes, cognitive and behavioural medicine, physical therapy, dietary modification, massage and acupuncture. When the woman has completed her family and particularly when pelvic varices have been demonstrated, hysterectomy can be considered after a careful pre-operative assessment. However, substantial pain relief may be achieved in no more than 60-70% of the cases. A minority of patients (3-5%) will experience worsening of pain or will develop new symptoms after surgery. Treatment of CPP, generally, requires acceptance of the concept of managing rather than curing symptoms.

The effect of surgery for symptomatic endometriosis: the other side of the story

BACKGROUND

Surgery is often considered the best treatment option in women with symptomatic endometriosis. However, extent and duration of the therapeutic benefit are still poorly defined.

METHODS

The best available evidence on surgery for endometriosis-associated pain has been reviewed to estimate the effect size of interventions in the most frequently encountered clinical conditions.

RESULTS

Methodological drawbacks limit considerably the validity of observational, non-comparative studies on the effect of laparoscopy for stage I-IV disease. As indicated by the results of three RCTs, the absolute benefit increase of destruction of lesions compared with diagnostic only operation in terms of proportion of women reporting pain relief was between 30% and 40% after short follow-up periods. The effect size tended to decrease with time and the re-operation rate, based on long-term follow-up studies, was as high as 50%. In most case series on excisional surgery for rectovaginal endometriosis, substantial short-term pain relief was experienced by approximately 70-80% of the subjects who continued the study. However, at 1 year follow-up, approximately 50% of the women needed analgesics or hormonal treatments. Major complications were observed in 3-10% of the patients. Medium-term recurrence of lesions was observed in approximately 20% of the cases, and around 25% of the women underwent repetitive surgery.

CONCLUSIONS

Pain recurrence and re-operation rates after conservative surgery for symptomatic endometriosis are high and probably underestimated. Clinicians and patients should be aware that the expected benefit is operator-dependent.