Tubal Reversal Blog ‘fallopian tube’

Tubal Reversal Scholarly Publications

Early Experimental Studies in Animals

In 1969, David, Brackett and Garcia ⁽¹⁾ reported using microsurgical techniques for uterotubal anastomosis after removing the uterotubal junction from one side in 25 rabbits. Among 11 (44%) of the animals that became pregnant, fewer implantations occurred on the operated side than on the unoperated side. This showed that the uterotubal junction has a role, but is not absolutely required, in transferring embryos from the fallopian tube into the uterus for implantation.

In 1974, Paterson and Wood ⁽²⁾ divided the isthmic segment of one fallopian tube and then performed tubal anastomosis in 10 rabbits. They removed the fallopian tube and ovary on the other side so that any pregnancies that followed could be attributed to the repaired fallopian tube. The pregnancy rate was 60%. These investigators suggested that tubal anastomosis could be applied successfully to humans for reversal of tubal sterilization.

Hulka and Ulberg ⁽³⁾ in 1975 were the first to perform a successful reversal of tubal sterilization under experimental conditions. Six weeks after applying Hulka clips to the isthmic portion of fallopian tubes in 8 pigs, they removed the clipped portion of tubes and performed tubal anastomosis using an absorbable, multifilament suture (6-0 Dexon). Six (75%) of the animals subsequently became pregnant.

In 1975 Winston ⁽⁴⁾ reported an experiment in rabbits in which the experimental variables were different suture materials and duration of tubal splinting. In one group of 25 rabbits, he removed a portion of the tubal isthmus or ampulla and then performed tubotubal anastomosis with a nonabsorbable, nonreactive, monofilament suture (10-0 nylon). Using microsurgical technique, Winston took special care to include only the 2 outer layers (muscularis and serosa) of the fallopian tube in the suture line, avoiding the inner tubal layer (endothelium). He stabilized the anastomotic sites with polyethylene splints that were removed before closure of the abdominal cavity. Twenty-three (92%) of the animals became pregnant. This was the highest pregnancy rate reported so far after tubal anastomosis in animal studies. When either 8-0 catgut was used as the suture material or the tubal splint was left in place for 1 week after surgery, the pregnancy rate dropped in half.

Winston’s results were subsequently corroborated using microsurgical tubal anastomosis with 11-0 nylon, intraoperative splinting, and avoiding mucosal trauma from suture in the reconstruction of rabbit oviducts six weeks after application of Falope rings. Eighteen (82%) of 22 rabbits became pregnant after two matings.

Comment

Experimental studies in animals demonstrated excellent pregnancy rates following reconstruction of the fallopian tube by tubal anastomosis. They provided the basis for tubal reversal surgery as a clinical treatment. The best results came using microsurgical techniques with non-reactive, monofilament suture material, intraoperative tubal splints, and avoiding the introduction of suture in the inner layer of the tube.

Dr. Berger uses these surgical techniques in his tubal reversal procedures. For a more complete description of the early history of tubal reversal surgery, read Dr. Berger’s book chapter, Reversal of Female Sterilization: An Evaluation of Results ⁽⁵⁾.

References

1. David A, Brackett BG, Garcia CR: Effects of microsurgical removal of the rabbit uterotubal junction. Fertil Steril 20:250, 1969
2. Hulka JF, Ulberg LC: Reversibility of clip sterilization. Fertil Steril 26:1132, 1975
3. Paterson P, Wood C: The use of microsurgery in the reanastomosis of the rabbit fallopian tube. Fertil Steril 25:757, 1974
4. Winston RML: Microsurgical reanastomosis of the rabbit oviduct and its functional and pathological sequelae. Br I Obstet Gynaecol 82 :513, 1975
5. Berger GS: Reversal of female sterilization: An evaluation of results. In JM Phillips, editor, Microsurgery in Gynecology, Chapter 33. American Association of Gynecologic Laparoscopists, Downey, California, 238-243, 1977.

Tubal Ligation Operations Vary

Tubal ligation operations vary in the amount of damage they cause to the fallopian tubes. Tubal coagulation (cauterization) tends to damage more of the tube than tubal ligation and resection or tubal clips/rings. Burning or cauterizing the fallopian tubes with a monopolar coagulator is more destructive than with a bipolar coagulator. With either type of coagulator, the more times the tube is burned, the greater the amount of damage that occurs.

How Much Fallopian Tube Remains After a Tubal Ligation?

The remaining amount and condition of the fallopian tubes after tubal ligation procedures varies a great deal. A patient’s tubal ligation operative report will give an indication about the remaining tubal segments that can be repaired by a tubal reversal procedure. When available, Dr. Berger always reviews the operative reports that are sent by patients to estimate the likely outcome from a tubal reversal operation.

In most cases, the tubal ligation operative report (and a pathology report if available) will help to determine if tubal reversal is possible. Until the time of surgery, the actual condition of the fallopian tubes remains unknown. This is partly because doctors differ in how they perform tubal ligation operations. With tubal coagulation procedures, for example, the coagulator can be used at different power settings and applied for varying lengths of time to the fallopian tubes. These details usually are not specified in an operative report.

Examining the Fallopian Tubes by Laparoscopy

Laparoscopy is a surgical procedure that permits viewing the fallopian tubes through a narrow telescope placed through a small incision below the belly button into the abdominal cavity. Laparoscopy can be performed for patients who want to be assured that tubal reversal is possible.

Laparoscopy is recommended in cases where the amount of tube remaining is questionable, such as after monopolar coagulation of multiple sites along the fallopian tube.

Dr. Berger performs laparoscopy under anesthesia and proceeds directly to tubal reversal, if examination shows the tubes are repairable. The patient is under anesthesia only one time. For safety reasons, screening laparoscopy is offered only to patients with a body mass index (BMI) of less than 30.

Screening Laparoscopy Cost

The additional charge for laparoscopy is $1000. If tubal reversal is not possible, the operation will end and you will receive a refund of close to 50% of the total surgery fee. The screening laparoscopy option is similar to an insurance policy. You purchase it and hope you never need it, but it is certainly nice if you do. Most patients do not elect to have the laparoscopic examination because of its additional cost and the knowledge that Dr. Berger can repair the fallopian tubes in 98% of cases, regardless of the method of tubal ligation.

Tubal Reversal Procedures

There are 3 types of tubal reversal procedures:

• anastomosis
• implantation - (this blog topic)
• salpingostomy

Implantation of Fallopian Tubes

Implantation of the fallopian tube is inserting the tube through a new opening into the uterus. Tubouterine implantation is correct medical terminology, but it is also called tubal implantation, uterotubal implantation, or uterine implantation.

Most tubal ligation operations leave two fallopian tube segments that can be reconnected. In some cases, only one tubal segment remains that is separated from the uterus and the portion of the tube within the uterine muscle is blocked as well. This is most likely to occur when a tubal ligation has been performed by monopolar tubal coagulation applied to the tubal segment next to the uterus. In this situation, tubal implantation is required as the tubal reversal procedure.

How I Perform Tubal Implantation

Tubal implantation is performed by making an incision through the uterine muscle. The incision is carried down into the uterine cavity. The tubal segment that has been separated from the uterus is opened and passed down until its proximal end is inside the uterine cavity. Before implanting the tube in the uterus, a suture is placed through the open end that goes inside the uterus. This suture is used to anchor the fallopian tube within the uterine cavity.

When the tube has been anchored inside the uterine cavity, sutures are placed in the uterine muscle around the implanted tube. Care must be taken to close the uterine incision sufficiently to allow healing, but not so tightly that it compresses or constricts the implanted tube. Tubal implantation is a more difficult operation to perform than tubal anastomosis. Tubal implantation accounts for 1% of tubal reversal procedures at Chapel Hill Tubal Reversal Center.

Tubal Reversal Procedures

There are 3 types of tubal reversal procedures:

• anastomosis - (today’s blog topic)
• implantation
• salpingostomy

Anastomosis of Fallopian Tubes

Anastomosis connects two body parts. Tubotubal anastomosis is connecting two segments of the fallopian tube. Tubotubal anastomosis is correct medical terminology, but it is also called tubal anastomosis for short. Bilateral tubal anastomosis means that both tubes are repaired by the anastomosis technique. The anastomosis sites can be specified for each fallopian tube. They may be different for the two sides. For example, a patient may have a right isthmic-ampullary tubotubal anastomosis and a left ampullary-ampullary tubal anastomosis. Sometimes, only one fallopian tube is repairable with the anastomosis technique. This is called unilateral tubotubal anastomosis.

Bilateral Tubal Anastomosis

Most tubal ligation operations separate the fallopian tube into two segments. Bilateral tubotubal anastomosis, therefore, is the most common tubal reversal procedure. Bilateral tubal anastomosis accounts for 90% of the tubal reversal procedures at Chapel Hill Tubal Reversal Center.

How I Perform Tubal Anastomosis

After opening the blocked ends of the two tubal segments, I pass a flexible stent or thread through the tubal lumen or opening of the two segments until it reaches the uterine cavity. This ensures that the fallopian tube is open from the uterine cavity to its fimbrial end and that the tubal segments align properly. A suture placed in the connective tissue, just beneath the fallopian tube segments, draws the tubal segments together.

The muscular and outer layers of the tubal segments are connected with microsurgical sutures. Care is taken to avoid suturing the inner layer of the fallopian tube. Suture material is a foreign body. Stitches placed in the inner tubal lining can cause scarring inside the tubal lumen. When the two tubal segments are joined together, the stent is withdrawn from the fimbrial end of the tube.

Watch The Operation

The images above illustrate the principles of tubotubal anastomosis. For more details, you can watch the operation as it is being performed. A short video clip online gives an overview. If you want to watch the entire tubal anastomosis procedure, you can order a videotape or dvd of Tubal Ligation Reversal by Dr. Berger as shown on TV by the Discovery and Learning Channels. Watching the full length video will help you better understand how I perform tubotubal anastomosis as outpatient tubal reversal surgery.

Tubal Ligation by Coagulation or Cauterization

Bipolar tubal coagulation is a popular method of female sterilization in the United States. This tubal ligation method is usually performed through laparoscopy. With the bipolar (two-poles) coagulator, the fallopian tube is grasped between two poles of electrical conducting forceps and electrical current is passed through the tube between the two ends of the forceps. Damage to the tube is limited mainly to the small segment between the forceps. Burning two or three adjacent sites is common and generally results in the loss of a few centimeters of the fallopian tube. Bipolar tubal cauterization can be successfully reversed in almost all cases.

Monopolar tubal coagulation is less common than bipolar coagulation tubal ligation. With monopolar forceps, electrical current spreads further along the length of the fallopian tube. Consequently, monopolar cautery tends to damage more of the fallopian tube than bipolar cautery. In many cases, the tube is also cut after it has been coagulated.

When monopolar coagulation is applied to a single site of the tube, tubal reversal can be performed without the need for further diagnostic tests. If multiple sites of the fallopian tube have been burned with the monopolar technique, we offer a screening diagnostic laparoscopy to evaluate the tubal lengths before proceeding to reparative surgery. The screening laparoscopy option is discussed further on our website.

Tubal Coagulation Reversal Success

Each year Chapel Hill Tubal Reversal Center publishes updated statistics about pregnancy rates and pregnancy outcomes among all of the women who have had tubal reversal procedures performed by Dr. Berger. The data for women who had tubal coagulation sterilizations, presented in the table below, are from our Tubal Reversal Pregnancy Study Report 2007.

Pregnancy Rates of Our Tubal Reversal Patients

The overall pregnancy rate after tubal reversal for women with tubal coagulation procedures is 68% for patients at Chapel Hill Tubal Reversal Center. To calculate the pregnancy rate, the number of women who have become pregnant is divided by the total number who underwent a tubal reversal procedure. The following table shows the numbers and pregnancy rates according to womens’ ages at the time of their tubal reversal surgery.

Pregnancy Rates After Tubal Coagulation Reversal

Conclusion

Tubal coagulation methods of tubal ligation can be successfully reversed in most cases. The pregnancy rate after tubal reversal varies with a woman’s age at the time she has her tubal reversal procedure. The pregnancy rate is 85% for women in their twenties, 74% for those ages 30-34, 64% for women in the 35-39 year age group, and 35% for women 40 years of age or older.

Tubal Ligation by Falope Ring and Hulka Clip

The Falope ring and Hulka clip are occlusive methods of tubal ligation. They block the fallopian tubes, but no tubal segments are clamped, removed, or burned. The Falope ring is also referred to as the tubal ring or tubal band. It constricts a segment of the fallopian tube very tightly, like an extra strong rubber band.

The Hulka clip is a miniature clamp placed across a very small (2-3 mm) segment of the fallopian tube. Another clip method besides the Hulka clip is the Filshie clip. The clips are similar except that the Hulka clip is made out of silastic and the Filshie clip is made out of metal. Occlusive methods of tubal ligation are predictably the best in terms of reversal since they damage such a tiny segment of the fallopian tube.

In contrast to the Pomeroy method, these occlusive devices are applied through a laparoscope. (Laparoscopy involves making a small incision below the belly button.) Many doctors prefer to apply tubal rings or clips when performing a tubal ligation on young women in recognition of the greater likelihood that a tubal reversal may be wanted in the future. Studies have shown that tubal ligation regret and the desire for tubal ligation reversal is more common when a tubal sterilization is performed among women in the twenties than among older women.

Tubal Clip and Ring Reversal Success

Each year Chapel Hill Tubal Reversal Center publishes current statistics about pregnancy rates and pregnancy outcomes among all of the women who have had tubal reversal procedures performed by Dr. Berger. The data for women who had tubal rings or clips shown in the table below is from our Tubal Reversal Pregnancy Study Report 2007.

Pregnancy Rates of Our Tubal Reversal Patients

The overall pregnancy rate after tubal reversal for women with clips or rings is 76% for patients at Chapel Hill Tubal Reversal Center. In the table below, the first column shows ages groups. The second column shows the number of women in each age group who had a tubal reversal. The third column shows the number of women in that group who became pregnant and the last column shows the percentage of women who became pregnant (the pregnancy rate) after their reversal procedures.

Pregnancy Rates After Tubal Reversal of Clips/Rings

Highest Pregnancy Rates After Tubal Reversal

The highest tubal reversal pregnancy rates are seen among women who have reversal of tubal clips or tubal rings. For women in their twenties, the pregnancy rate was 87%. The pregnancy rate ranged from 83% to 73% for women in their thirties. Among women age 40 or older, the pregnancy rate was significantly lower (47%), reflecting the decline in natural fertility with age. These pregnancy rates among our tubal reversal patients are similar to the pregnancy rates for women who have never had a tubal ligation to begin with.

The fallopian tube is an amazing and versatile reproductive organ. Its functions include capturing an egg from the ovary at the time of ovulation; nourishing the fertilized egg or zygote during its early cell divisions; and delivering the blastocyst into the uterine cavity when it is time for implantation. The different parts of the fallopian tube correspond to these various functions.

Tubal Anatomy

The end of the tube furthest from the uterus is the fimbria. The fimbrial segment is lush with cilia that beat vigorously and sweep the egg into the tube where it is fertilized. The egg is quickly moved by the bell-shaped infundibular segment into the ampullary region of the tube. Over the next several days, the combination of muscular contractions and ciliary movement move the egg toward the uterus. The ampulla provides nourishing fluid that allows repeated cell divisions. When the dividing egg (zygote) reaches the stage where the outer membrane dissolves (blastocyst), it is time to be delivered into the uterine cavity. This is the function of the muscular isthmic segment of tube closest to the uterus.

Does Anatomy Predict Function After Tubal Reversal?

Given the complexity of the functions of the fallopian tube, one might wonder if any portion is essential for pregnancy to occur. Years ago, based on the information available in medical texts, I assumed that there would be essential parts or a minimum length of tube needed to result in a normal pregnancy. However, there was little information available to answer this question. Therefore, I began recording the portions of tube removed, tubal segment lengths remaining, and other details about each patient’s reversal operation in an electronic database. Since the staff members at Chapel Hill Tubal Reversal Center follow-up with patients regarding pregnancy after tubal reversal, it has become possible to study the interaction of tubal anatomy and the tube’s ability to function normally.

A Surprising Discovery

Over the 30 years that I have been performing tubal reversal procedures, I have seen every variation of tubal ligation imaginable regarding the sections of tubes removed and lengths of tube remaining to repair. It was surprising to learn that no specific part of the fallopian tube is absolutely required for pregnancy to occur. Somehow, the fallopian is able to compensate for the loss of specific parts and still function normally! Based on this knowledge, I am optimistic in being able to repair any kind of tubal sterilization procedure with the expectation that it will allow the possibility of having more children.