A systematic review of long-term complications of mechanical tubal occlusion

OBJECTIVES

To collate the available evidence of the rare but identified late complications of mechanical tubal occlusion. The primary objective is to describe the nature of these longer-term acute presentations. Secondary objectives are: 1) to delineate their aetiology, 2) characterise imaging findings and 3) identify successful management options.

STUDY DESIGN

Literature search using National Institute of Clinical Excellence Healthcare Databases Advanced Search and terms (complicat* OR torsion OR infect* OR migrat* OR extru*) AND (tubal occlusion OR sterili*). Results reviewed by CM and JH for eligibility.

RESULTS

33 published case reports of long-term complications of mechanical tubal occlusion. 30 demonstrated migration of the device. 16 had infective pathology. Multiple modalities of imaging used with no clear evidence that one was superior. Medical and surgical management was used with removal of device proving definitive treatment.

CONCLUSIONS

Long-term complications of mechanical tubal occlusion are rare and show a varied clinical course. Clinicians should be mindful of this when evaluating patients in the acute setting, as there is no identified timeline as to when complications may occur. Imaging is almost always essential for diagnosis and the modality should be directed by the clinical presentation. Definitive management is by removal of the occlusive device, but this carries its own risks.

Restoring tubal patency with laparoscopic tubocornual anastomosis

OBJECTIVE

To assess the technical feasibility of laparoscopic tubocornual anastomosis (TCA) at restoring tubal patency in patients with proximal tubal occlusions.

MATERIALS AND METHODS

A retrospective analysis of fourteen females with identified proximal tubal occlusions seeking to restore their tubal patency in a university-affiliated tertiary hospital between 2011 and 2018. Tubal patency within one year after the surgery was evaluated.

RESULTS

The patients had a mean age of 34.0 ± 3.6 years old, median parity of 1 child, and mean BMI of 23.0 ± 5.2 kg/m². Of the fourteen patients, two (14.3%) received bilateral TCA, eight (57.1%) received only unilateral TCA, and four (28.6%) received TCA on one side and tubal anastomosis on the other. The operative time was 126.4 ± 37.9min for unilateral procedure and 201.0 ± 1.4 min for bilateral anastomoses. Postoperative hysterosalpingogram (HSG) demonstrated a patency rate of 64.2% at the TCA sites. Two ectopic pregnancies were reported thereafter.

CONCLUSION

This preliminary series demonstrates that laparoscopic TCA is technically feasible and provides promising results for patients with proximal tubal occlusions hoping to restore their tubal function in order to conceive naturally. A larger prospective series is mandatory to establish its significance and application in clinical practices. Notably, infertile patients without surgically correctable factors are not suitable for this procedure.

Reversible inhibition of sperm under guidance as an intratubular and reversible contraception in female rats: An experimental study

Background

Reversible inhibition of sperm under guidance (“RISUGⓇ”) is a promising intravasal male contraceptive.

Objective

An exploratory study was conducted with a concept of non-invasive, transcervical, single-intervention and reversible contraception using RISUGⓇ in females.

Materials and Methods

In this experimental study, 60 adult Wistar albino female rats weighing 150-155 g, 3-4 months old were divided into four groups: group I: sham-operated control; group II: tubal occlusion with RISUG for 90 days; group III: tubal occlusion with RISUGⓇ for 90 days and reversal with dimethyl sulphoxide and group IV: tubal occlusion with RISUGⓇ for 90 days and reversal with 5% NaHCO. Animals were subjected to bilateral fallopian tube occlusion with RISUGⓇ and reversal with DMSO and NaHCO3. The estrous cycle, fertility and histology of fallopian tube were evaluated.

Results

Group I showed 100% fertility during all mating schedules. Animals of experimental groups indicated positive mating, but 0% fertility was evident following 30, 60, and 90 days of tubal occlusion. However, after reversal, fertility steadily increased to normalcy in groups III (50% at 45 days, 80% at 105 days, 100% at 150 and 195 days) and IV (70% at 45 and 105 days, 100% at 150 and 195 days) animals. Group II illustrated disorganized inner cell linings and eosinated RISUGⓇimplant-filled lumen. Reversal groups (III and IV) revealed complete restoration of cellular histo-architecture. Regular estrous cycle was noticed in all experimental groups.

Conclusion

RISUGⓇ is suitable for single intervention, intratubular, reversible contraception in female rats.

Outcomes after successful fallopian tube recanalization: A single institution experience: Observational Retrospective study

PURPOSE

To determine outcomes after successful fallopian tube recanalization (FTR) in women who suffer infertility with documented tubal occlusion on hysterosalpingogram.

METHODS

A retrospective review of consecutive successful FTR procedures from January 2010 to December 2016 was performed. 53 women who had hysterosalpingogram confirmed unilateral or bilateral tubal occlusion from a single tertiary academic medical center and successful FTR were eligible for inclusion. 35 (66.0%) patients had follow up at 12 months after FTR, with 13 conceiving within 1 year of the procedure. Data was collected from the medical record. Complication, conception, and take-home-baby (THB) rates were recorded. The average age of patients was 32.3 years (range 26-42 years). All patients received peri- and post-procedure antibiotics. The study was conducted with institutional IRB approval.

RESULTS

Average follow-up after FTR was 1335 days. All patients tolerated the procedure well with no immediate complications. One patient had a urinary tract infection a week after FTR. 13 (37.1%) became pregnant after FTR. Of these women, 2 had ectopic pregnancies and 2 patients had spontaneous abortions. The THB rate after FTR for all patients was 25.7%. The THB rate in women who became pregnant after FTR was 69.2%. Of those women who did not become pregnant after FTR, 19 (84.6%) went to assisted reproductive techniques, and of those, 8 (42.1%) became pregnant.

CONCLUSION

Infertility affects 8.4% of U.S. women, with tubal disease a major causative factor. In our study, successful FTR led to pregnancy in over a third of the patients with the majority giving birth to healthy babies. Given the success of obtaining pregnancy in combination with a low complication rate, FTR is a viable option in women who suffer from tubal infertility.

Hysterosalpingography in endometriosis: performance and interpretation

Endometriosis is often seen and sometimes initially diagnosed on hysterosalpingography (HSG), an imaging exam routinely performed on patients with infertility. Here we discuss the role of HSG in the evaluation of patients with infertility with a focus on patients with endometriosis. The HSG technique, including patient preparation as well as potential risks and complications, is detailed. Imaging findings in patients with endometriosis are illustrated and a template for exam reporting is presented. Common imaging pitfalls are described with examples.

ACR Appropriateness Criteria® Female Infertility

The most common known causes of female infertility are male factor (26%), ovulatory failure (21%), and tubal damage (14%), while in 28% a couple's infertility remains unexplained. Female-specific causes of infertility include deterioration of oocyte quality with increasing maternal age; ovulatory disorders, most notably polycystic ovarian syndrome; history of salpingitis such as that caused by chlamydia infection; endometriosis; and uterine cavity abnormalities interfering with implantation causing inability to become pregnant or causing recurrent pregnancy loss. These potential causes of female infertility are discussed in this document and the appropriate imaging recommendations for each variant are provided. The American College of Radiology Appropriateness Criteria are evidence-based guidelines for specific clinical conditions that are reviewed annually by a multidisciplinary expert panel. The guideline development and revision include an extensive analysis of current medical literature from peer reviewed journals and the application of well-established methodologies (RAND/UCLA Appropriateness Method and Grading of Recommendations Assessment, Development, and Evaluation or GRADE) to rate the appropriateness of imaging and treatment procedures for specific clinical scenarios. In those instances where evidence is lacking or equivocal, expert opinion may supplement the available evidence to recommend imaging or treatment.

Chlamydia trachomatis infection among Ghanaian women undergoing hysterosalpingography for suspected tubal factor infertility

OBJECTIVE

To determine the prevalence of Chlamydia trachomatis infection and the correlates of tubal pathology among Ghanaian women undergoing hysterosalpingography for suspected tubal factor infertility.

METHODS

A cross-sectional study was conducted among 189 women with infertility who underwent hysterosalpingography at Korle Bu Teaching Hospital, Ghana, from September 1 to November 30, 2016. Demographic data; obstetric and gynecologic history; and hysterosalpingography findings were collected using a structured questionnaire. Endocervical swabs were tested for the presence of Chlamydia trachomatis using a rapid antigen-based diagnostic kit. Associations between the variables were assessed using bivariate analysis.

RESULTS

Positive test results for Chlamydia trachomatis were recorded among 15 participants, giving an overall prevalence of 7.9% (95% confidence interval [CI] 4.1%-11.7%). In all, 67 (35.4%) participants had abnormal findings on hysterosalpingography, with 40 (21.2%) displaying bilateral tubal occlusion. The remaining 122 (64.6%) women had normal findings on hysterosalpingography. Eight participants with normal tubal appearance tested positive for Chlamydia trachomatis (prevalence 6.6%, 95% CI 2.2%-11.0%), whereas seven participants with abnormal tubal appearance tested positive (prevalence 10.4%, 95% CI 3.1%-17.7%; P=0.402). No associations were found between participant characteristics and tubal pathology.

CONCLUSION

The prevalence of Chlamydia trachomatis did not differ by hysterosalpingography findings.

Treatment of hydrosalpinx in relation to IVF outcome: a systematic review and meta-analysis

Salpingectomy is the most widely used treatment for hydrosalpinx. The effect of salpingectomy on the stimulation response during subsequent IVF treatment, however, remains unclear. The aim of this systematic review was to evaluate the ovarian response and pregnancy outcome of IVF treatment carried out after salpingectomy compared with other pre-IVF treatment options for hydrosalpinx. We conducted a literature search using PubMed, Ovid MEDLINE, Google Scholar, ClinicalTrials.gov and the Cochrane Central Register of Controlled Trials. Five randomized studies and nine observational studies were included in the systematic review and evaluated using Cochrane Collaboration's tool for randomized, Newcastle-Ottawa scale for observational studies and GRADE guidelines for certainty of evidence assessment. The mean number of retrieved oocytes was similar between the groups in randomized (mean difference [MD] = -0.03, 95% CI -0.75 to 0.70) and observational studies (MD = -0.15, 95% CI -2.32 to 2.02). Live birth (RR 1.59, 95% CI 1.17 to 2.16), clinical pregnancy (RR 1.27, 95% CI 1.02 to 1.57) and implantation rates (RR 1.55, 95% CI 1.16 to 2.08) were higher in the salpingectomy group in randomized studies. The present systematic review and meta-analysis showed that salpingectomy does not impair the ovarian response during subsequent IVF treatment.

Comparing options for women seeking permanent contraception in high-resource countries: a protocol for a systematic review

BACKGROUND

For women seeking permanent contraception, there are a variety of options available including surgical techniques such as tubal ligation or bilateral salpingectomy, in-clinic procedures such as hysteroscopic techniques using micro-inserts, or the levonorgestrel-releasing intrauterine contraceptive. Despite the various methods available for women who are seeking permanent contraception, there is not a review or decision-making tool that systematically brings together outcomes related to effectiveness, tolerability, adverse effects, non-contraceptive benefits, recovery, or accessibility: all of which are important for shared decision-making between patients and health care providers.

METHODS

We registered our protocol [on Prospero: CRD42016038254] following PRISMA guidelines. A search strategy was created in collaboration with a librarian, and three databases (EMBASE, PubMed, Web of Science) will be searched along with secondary screening of relevant articles. A third reviewer will adjudicate any discrepancies. Data will be extracted independently according to population, intervention, comparison, outcomes (PICOS); length of follow-up; and funding. Articles will be assessed for bias using the Newcastle-Ottawa Scale and the Cochrane Collaboration tool. If appropriate, a network meta-analysis will be conducted to rank and analyze each method according to each objective. If heterogeneity between studies is too high or it is not possible to conduct a network meta-analysis, a narrative analysis of the study results will be provided.

DISCUSSION

Clinicians and their patients seeking permanent contraception have several options, yet we were unable to find a systematic review or decision support tool helping to facilitate shared decision-making. This systematic review can inform patients, providers, and health policy decision-makers about which options of permanent contraception will meet different reproductive goals according to various outcomes, which can lead to better health, social, economic, and mental well-being for reproductive age women. This can also aid our understanding of resulting costs to the health care system.

SYSTEMATIC REVIEW REGISTRATION

PROSPERO CRD42016038254.

Hydrosalpinx - Salpingostomy, salpingectomy or tubal occlusion

Tubal factors account for approximately 25% of cases of infertility, and the most severe manifestation of tubal disease is hydrosalpinx, accounting for 10-30% of tubal diseases. Hydrosalpinx is a distension or dilatation of the fallopian tube in the presence of a distal tubal occlusion, and the most common cause is pelvic inflammatory disease. Women with hydrosalpinges have lower implantation and pregnancy rates in assisted reproductive technology (ART), due to a combination of mechanical and chemical factors thought to disrupt the endometrial environment. Current guidance is removal of the tube by salpingectomy (preferably laparoscopically) before IVF treatment. Salpingostomy, or distal tubal plastic surgery in the management of hydrosalpinx, is an alternative for women desiring natural conception, although ectopic pregnancy rates as high as 10% have been reported. Proximal tubal occlusion with Essure^® devices placed hysteroscopically can be considered particularly in cases of distorted pelvic anatomy or pelvic adhesions making abdominal surgery complex. However, low clinical pregnancy and live birth rates have been reported with the use of these devices before IVF. In this review, we discuss salpingostomy, salpingectomy and tubal occlusion as possible management options for the reproductive women with hydrosalpinx.

Hysteroscopic Placement of Platinum Microinsert in Patients With Hydrosalpinx Before In Vitro Fertilization and Embryo Transfer

OBJECTIVE

To investigate the effectiveness of Tornado and Hilal (Cook Medical, Bloomington, IN) hysteroscopic proximal tubal occlusion (HPTO) for hydrosalpinx (HX) treatment before in vitro fertilization (IVF) and embryo transfer (ET) in patients with dense pelvic adhesions or low ovarian reserve.

DESIGN

A retrospective study of patients treated between May 2014 and May 2016 (Canadian Task Force classification III).

SETTING

A university-affiliated center.

PATIENTS

One hundred fifty women with unilateral or bilateral HX who were not candidates for laparoscopic surgery.

INTERVENTION

Tornado or Hilal HPTO before IVF-ET and/or frozen ET.

MEASUREMENTS AND MAIN RESULTS

The main outcome was the cumulative live birth rate. Tornado or Hilal placement was successful for 143 (95.3%) patients. Of the 132 patients who underwent 204 ET cycles, 86 (65.2%) conceived, and 78 (59.1%) resulted in live births. The overall early and late miscarriage rates per clinical pregnancy were 12.8% and 1.1%, respectively. The ectopic pregnancy rate was 2.3%. No major complications occurred.

CONCLUSION

Tornado or Hilal HPTO is an effective alternative for treating HX before IVF-ET/frozen ET in patients with dense pelvic adhesions or low ovarian reserve.

Fibered platinum coil: A novel option for the patients of hydrosalpinx with laparoscopic contradiction

OBJECTIVE

To investigate the feasibility of proximal tubal occlusion with fibered platinum coils in subfertile women with hydrosalpinx, and to observe the clinical outcomes of subsequent treatment with in vitro fertilization and embryo transfer (IVF-ET).

STUDY DESIGN

A prospective study was carried out in a university-affiliated teaching hospital. 56 women with uni- or bilateral hydrosalpinx received fibered platinum coil placement before IVF-ET. The clinical pregnancy rate and live birth rate was evaluated. Data analysis was performed with SPSS version 22.0 (SPSS, Inc., Chicago, IL, USA), using two-sided test, and a p value < 0.05 was considered statistically significant. The study has been registered in the ClinicalTrials. gov with the number of NCT03395301.

RESULT(S)

Successful placement was achieved in 106 fallopian tubes of 55 patients. The fibered platinum coils induced complete proximal occlusion in 52 out of 55 patients in the following 3-month HSG examination. In the 52 patients, 44 patients received following IVF-ET. The clinical pregnancy rate reached 60.5%(23/38)and live birth rate reached 60.87% (14/23) in patients less than 40 years old.

CONCLUSION(S)

Fibered platinum coil is a new, safe and valuable device for hysteroscopic tubal proximal occlusion in subfertile women with hydrosalpinx but with laparoscopic contradictions to improve the reproductive outcomes of IVF-ET. Capsule: Fibered platinum coil is a new, safe and valuable device for hysteroscopic tubal proximal occlusion in subfertile women with hydrosalpinx to improve the reproductive outcomes of in vitro fertilization and embryo transfer.

Effect of Premedication Hyoscine-N-Butylbromide before Hysterosalpingography for Diagnosis of Proximal Tubal Obstruction in Infertile Women: A Randomized Double-Blind Controlled Trial

STUDY OBJECTIVE

To assess the effect of hyoscine-N-butylbromide (HBB) as premedication on the rate of proximal tubal obstruction during hysterosalpingography (HSG).

DESIGN

A randomized, double-blind controlled trial (Canadian Task Force classification I).

SETTING

The Infertility Clinic of Songklanagarind Hospital.

PATIENTS

One hundred and forty-six infertile women indicated for HSG investigation.

INTERVENTIONS

Between May 1, 2016, and March 31, 2017, patients were assigned at random to receive either oral HBB 20 mg or placebo 30 minutes before the HSG procedure. If proximal tubal obstruction was found, participants were be assigned to undergo a second confirming HSG or laparoscopy with chromopertubation within 6 months.

MEASUREMENTS AND MAIN RESULTS

The primary outcome was the rate of proximal tubal obstruction. The secondary outcome was the false-positive result of proximal tubal occlusion from HSG. Proximal tubal obstruction was found in 6 of 70 patients in the HBB group and in 16 of 71 in the placebo group. The rate of proximal tubal obstruction was significantly lower in the HBB group than in the placebo group (8.6% vs 22.5%; p = .04; absolute difference, 13.9%; 95% confidence interval [CI], 0.02-0.26; relative risk, 0.38; 95% CI, 0.16-0.92). After the second HSG or laparoscopy was performed (n = 22), the rate of false occlusion was 20% (1 of 6 patients) in the HBB group, compared with 69.2% (9 of 16 patients) in the placebo group.

CONCLUSION

Premedication with HBB before HSG can reduce the rate of diagnosis of proximal tubal obstruction and false occlusion.

Polidocanol induced tubal occlusion in nonhuman primates: immunohistochemical detection of collagen I-V

OBJECTIVE

Intrauterine administration of polidocanol foam (PF) can create fallopian tube occlusion in nonhuman primates. The objective of this study was to determine if PF-induced tubal obstructions contain collagen in the extracellular matrix.

STUDY DESIGN

We compared tissue samples of the intramural fallopian tube obtained from previous studies evaluating the effects of intrauterine infusion of 5% PF 2-12 weeks after treatment. Serial sections of the intramural portion of the fallopian tube obtained from representative treated (rhesus macaques, n=7; baboon, n=11) and untreated control (macaque, n=3; baboon, n=5) animals were stained with hematoxylin and eosin to identify tubal occlusion and by immunohistochemistry for collagens Col-I, Col-III and Col-IV. Descriptive results are summarized.

RESULTS

Control animals exhibited histologically normal fallopian tubal epithelium with no staining for Col-1, light staining for Col-III and Col-V in the lamina propria and Col-IV distributed evenly in the extracellular matrix of the lamina propria. Treatment with PF resulted in acute tissue damage confined to the intramural tube; no epithelial damage or occlusion occurred in the tubal isthmus or ampulla. Blockade of the intramural tube demonstrated fibrosis with the epithelium replaced with extracellular matrix that stained strongly for Col-I, Col-III, Col-IV and Col-V. Col-II was undetectable.

CONCLUSION

Tubal blockage induced by PF resulted in loss of normal epithelium and accumulation of collagens Col-I, Col-III, Col-IV and Col-V at the site of obstruction. The presence of dense collagen staining supports the hypothesis that PF infusion creates lasting tubal obstructions.

IMPLICATIONS

This study demonstrates that PF-induced tubal occlusion results in deposition of collagens suggesting the potential for a more lasting blockade. The structural nature of this occlusion supports the development of intrauterine administration of PF as a nonsurgical method of permanent contraception.

Colorectal cancer presenting as tuboovarian abscess in a 40 year old patient with previous tubal occlusion

Background

Although pelvic inflammatory disease can be seen after tubal occlusion, tuboovarian abscess is rare, with only 38 cases reported since 1975 [1]. The differential diagnosis of tuboovarian abscess after tubal occlusion should include non-infectious and non-gynecologic etiology, particularly as women age [2].

Case

A 40 year old multiparous woman with a distant history of tubal occlusion, presented with pelvic pain and suspected right tuboovarian abscess with air on CT scan. A colonic stricture was also seen, warranting further evaluation, which revealed a left tuboovarian abscess which had fistulized from a bowel perforation secondary to colorectal cancer.

Conclusion

Tuboovarian abscess is rare after tubal occlusion. These patients should be evaluated specifically for nongynecologic etiology, including colorectal cancer. Radiologic studies can be misleading, and surgical exploration should be strongly considered if a woman with a history of tubal occlusion presents with a presumptive tuboovarian abscess, particularly if the abscess contains air.

•

Tuboovarian abscess after tubal occlusion is rare.

•

Consider a thorough non-gynecologic differential diagnosis, in cases of tuboovarian abscess distant from tubal occlusion.

•

Abscesses distort anatomy, so laterality seen in radiologic studies may be misleading.

•

Surgical exploration should be strongly considered, particularly when there is air visualized radiologically in the abscess.

•

There is a need for further studies of the incidence of radiologically visualized air in surgically proven tuboovarian abscesses.

Improvement of stability of polidocanol foam for nonsurgical permanent contraception

BACKGROUND

Polidocanol foam (PF), used clinically as a venous sclerosant, has recently been studied as a safe and inexpensive means for permanent contraception. Delivering the sclerosant to the fallopian tubes as a foam rather than a liquid increases the surface areas and thus enhances the desired epithelial disrupting activity of the agent. However, the foam is inherently unstable and degrades with time. Therefore, increasing foam stability and thus duration of the agent exposure time could increase epithelial effect while allowing reduction in agent concentration and potential toxicity.

MATERIALS AND METHODS

We studied methods to improve foam properties that might improve safety and efficacy of PF for intrauterine application. Several types of microporous filters adapted to a syringe-based foaming device were used to study the effect of pore structures on the formation of PF. The foam drainage time and bubble size were characterized. The addition of benzalkonium chloride (BZK) to polidocanol was also investigated for its effects on foam characteristics.

RESULTS

A syringe-based foaming device adapted with an inline filter produced smaller bubble PF with a longer foam drainage time. PF generated with a circular pore filter lasts longer than with a noncircular pore filter. The addition of 0.01% of BZK also improved the stability of PF.

CONCLUSION

The stability of PF is affected by the pore characteristics of the filter used for foam generation and enhanced by the presence of a small amount of BZK. The improved foam, if shown to be efficacious in animal models of contraception, could lead to a safe, simple and inexpensive method alternative to surgical contraception.

Clinical application of operative hysteroscopy in treatment of complex hydrosalpinx prior to IVF

BACKGROUND

In vitro fertilization and embryo transfer (IVF-ET) is the best option for patients with hydrosalpinx. However, if hydrosalpinges is not pre-treated, the therapeutic outcomes of IVF-ET would be compromised.

OBJECTIVE

This study aims to investigate the safety and effects of operative hysteroscopy in the treatment of patients with hydrosalpinx prior to IVF-ET, who were not indicated for laparotomy due to extensive pelvic adhesion.

MATERIALS AND METHODS

The study analyses retrospectively data from 10 women with hydrosalpinx, who were unable to undergo laparotomy due to extensive pelvic adhesion and treated by operative hysteroscopy prior to IVF-ET, and was assessed the effects and safety of the procedure.

RESULTS

Postoperative Hystero-salpingography demonstrated complete tubal occlusion of the diseased side in all cases. Being applied with IVF-ET for fertility after their hysteroscopy operation, 5 out of 10 patients acquired clinical pregnancy.

CONCLUSION

Hysteroscopic tubal occlusion of the proximal part of the hydrosalpinx can effectively prevent the hydrops backflow to endometrial cavity and benefit subsequent implantation in the course of assisted reproduction without significant complications.

The history and current status of fallopian tube pressures - developing alternate methods for confirmation of tubal occlusion

Permanent contraception with hysteroscopic tubal ligation is an increasingly popular choice for women around the world. However, inconveniences associated with the required confirmation test for tubal occlusion can be prohibitive. As new methods of permanent contraception are being investigated, ways of making all aspects of the procedure more accessible and comfortable for women should be considered. Means of examining tubal patency in the infertility population, such as tubal perfusion pressures measured at the time of hysterosalpingogram (HSG), provide inspiration for alternative methods of tubal occlusion confirmation after contraception. Evaluation of intrauterine pressures measured by a manometer attached to an intrauterine balloon catheter could serve as a preliminary tool for verification of tubal occlusion; higher pressures would indicate tubal occlusion and lower pressures would indicate the need for confirmatory HSG. The development and validation of this technique is ongoing and could reduce overall costs and patient burdens associated with the current tubal occlusion confirmation procedure.

Blockade of tubal patency following transcervical administration of polidocanol foam: initial studies in rhesus macaques

OBJECTIVE

To demonstrate the feasibility of polidocanol foam (PF) as a nonsurgical method of female permanent contraception using a nonhuman primate model.

STUDY DESIGN

Four groups of adult female rhesus macaques underwent either transcervical treatment with 5% PF directly into the uterine cavity, treatment with inert (methylcellulose, MF) foam or no treatment followed by removal of the reproductive tract for histologic evaluation. Untreated animals were included in Group 1 (n=3). Group 2 animals (n=4) were treated once with MF. Group 3 (n=7) received a single, and Group 4 (n=5) received multiple monthly treatments with PF; in these 2 groups, baseline tubal patency was assessed either laparoscopically by chromopertubation (CP) or by hysterosalpingography.

RESULTS

Group 1 (untreated) and Group 2 (MF) animals had normal tubal histology. In contrast, Group 3 and 4 females treated with PF showed evidence of tubal damage. In Group 4, bilateral tubal blockade was noted on CP after two (n=2) or three (n=3) treatments. Histologic analysis confirmed complete tubal occlusion (loss of epithelium, fibrosis) in three of these animals, and one showed significant tubal damage localized to the intramural segment. Nontarget (cervix, vagina, endometrium, ovary) reproductive tissues were unaffected. While similar tubal changes were observed after a single treatment (Group 3), endometrial hemorrhage was also noted as an acute change.

CONCLUSION

PF is a promising candidate agent for nonsurgical permanent female contraception. The histologic features of PF occlusion are confined to the intramural portion of the tube.

IMPLICATIONS

This study in rhesus macaques supports further development of transcervical administration of PF as a nonsurgical approach to permanent contraception. A nonsurgical method could reduce risks and costs associated with surgical female sterilization and increase access to permanent contraception.