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Surgical Technique


Ins and outs of straight-stick laparoscopic myomectomy

The multiple advantages a laparoscopic approach to myomectomy can offer over laparotomy hinge on surgical technique—from preoperative evaluation to uterine repair. Here, pointers and steps to success.

September 2012 · Vol. 24, No. 9

IN THIS ARTICLE


Watch 3 videos illustrating laparoscopic myomectomy

These videos were provided by Gaby Moawad, MD, and James Robinson, MD, MS.

By age 50, almost 70% of white women and more than 80% of black women will have a uterine leiomyoma.1 These benign, hormone-sensitive neoplasms1 are asymptomatic in the majority of women, but they can cause infertility, abnormal uterine bleeding, and bulk symptoms.2

When symptomatic, fibroids are amenable to multiple management options, ranging from expectant management to medical therapy to uterine artery embolization to myomectomy to hysterectomy. Myomectomy remains the surgical option of choice for women with symptomatic fibroids who wish to retain their fertility. It is also an option for some women who may not desire fertility retention but who do wish to maintain their uterus.

Compared with traditional myomectomy by laparotomy, laparoscopic myomectomy offers the advantages of:

  • less blood loss
  • less postoperative pain
  • less postoperative adhesions formation
  • faster recovery
  • better cosmesis.3,4

Current technology makes performing laparoscopic myomectomy by either “straight-stick” or robotic assistance a viable option for most women.

In this article, we describe our technique in performing straight-stick laparoscopic myomectomy.

Preoperative evaluation: The first key to success

Laparoscopic myomectomy is an advanced, delicate, and challenging surgery. Preoperative evaluation is integral to its planning and a successful outcome.

Imaging

We recommend magnetic resonance imaging (MRI) as a standard order whenever a laparoscopic approach to myomectomy is being considered, for several reasons. First, MRI of the abdomen and pelvis with contrast allows for a precise map of the location of fibroids in relation to the myometrium and the uterine cavity. Reviewing the MRI results with the patient preoperatively gives both you and the patient a clearer picture of the challenges ahead. Patients tell us they appreciate these easier-to-understand images of their anatomy and, in cases when the decision is made to proceed abdominally, it is more clear to the patient why the decision is being made.

Surgically, the MRI helps compensate for the lack of tactile feedback when faced with deep intramural fibroids laparoscopically. The MRI also helps avoid operative surprises. Experience teaches us that, when relying on transvaginal ultrasound alone, adenomyotic regions can be identified mistakenly as fibroids. Preoperative MRI can help you avoid this discovery at the time of surgery.

A flexible office hysteroscopy serves as an adjunct to MRI for precise preoperative cavitary evaluation, especially when fibroids are present in close proximity to the endometrial cavity or the patient reports menorrhagia as a component of her symptomatology. When small submucosal fibroids exist in addition to larger fibroids, we frequently perform a combined hysteroscopic and laparoscopic approach to myomectomy.

Although bowel preparation does not diminish complications from bowel surgery or improve outcome,5 we generally use laxative suppositories the night prior to surgery to improve access to the posterior cul-de-sac and reduce bulk resulting from a sigmoid full of feces.

Preoperative laboratory evaluation should always include complete blood count, beta hCG, blood type testing, and antibody screen. In patients with known anemia or large intramural fibroids, we typically match the patient for 2 units of packed red blood cells. Additionally, if significant blood loss is anticipated, cell saver technology can be modified to accommodate a laparoscopic suction tip, allowing the patient’s own blood to be collected and readministered.

Counseling your patients on the risks of laparoscopic myomectomy

Aside from the standard risks of surgery, including bleeding, transfusion, infection, and injury to adjacent organs, myomectomy has its own unique risks that need to be made clear to patients preoperatively.

Surgery timing. Initially, women with symptomatic fibroids are at significant risk for developing more fibroids in the future. In fact, 25% of women who undergo myomectomy will require a second surgery at some point in their lives to address recurrent symptoms.1 If women are young, not yet ready to conceive, and are still relatively asymptomatic, waiting to perform myomectomy may be the most prudent course.

Future uterine rupture. There are no good myomectomy data to guide us with respect to the risk of uterine rupture at future pregnancy. When we perform deep intramural myomectomy (regardless of endometrial disruption), we extrapolate from classical cesarean section data and counsel our patients to have planned cesarean sections for all future pregnancies. Patients are also counseled that uterine rupture has been well described after laparoscopic myomectomy prior to the onset of labor so any sudden onset of pain or bleeding during the late second or third trimester of pregnancy has to be regarded as a medical emergency.

Pregnancy. Again, no good data exist to guide us with respect to postoperative timing of future pregnancy. We typically suggest patients refrain from conceiving following myomectomy for at least 6 months. We are aware that other well-respected surgeons have different thresholds.

Reference

1. Andiani GB, Fedele L, Parazzini F, Villa L. Risk of recurrence after myomectomy. Br J Obstet Gynaecol. 1991;98(4):385-389.

How to minimize blood loss

Blood loss during laparoscopic myomectomy generally is less than during laparotomy due to venous compression from pneumoperitoneum. However, blood loss remains a chief concern when performing laparoscopic myomectomy. A variety of techniques have been described to minimize blood loss, including injection of dilute vasopressin6 and tourniquet placement around uterine vessels.7

Injection. To temporarily minimize bleeding in the surgical field, we routinely utilize subserosal injection of dilute vasopressin (20 IU in 100 mL of normal saline) until visible vessels blanch. This practice is more effective than deep myoma or myometrial injection.

Tourniquet. We selectively use a laparoscopically placed tourniquet to compress uterine arteries at the mid-cervix during surgery. One approach is as follows (see VIDEO 1):

  1. Open windows in bilateral broad ligaments lateral to the uterine pedicles and medial to the ureters.
  2. Pass the end of a 14-16 French red rubber catheter through one of the low lateral port sites with the port removed.
  3. Tag the trailing end of the tourniquet outside the abdomen and replace the port alongside the catheter.
  4. Pass the end of the catheter down through the ipsilateral broad ligament window and under the posterior cervix.
  5. Pass the end of the catheter up through the contralateral broad ligament window and over the anterior cervix.
  6. Pass the end of the catheter through each of the broad ligament windows a second time and then out through the contralateral port site.
  7. Pull the tourniquet tight from both port sites (which will occlude the uterine arteries). Place Kelly clamps on the catheter ends where they exit the port sites to maintain tension until the end of the uterine repair.

Lateral ports can still be utilized with the tourniquet in place.

Permanent occlusion. In women undergoing laparoscopic myomectomy who have completed child bearing, we advocate permanent uterine artery occlusion at the origin of the uterine arteries retroperitoneally. This can be performed in a number of ways— utilizing clips, suture, or transection. Uterine artery occlusion not only leads to less operative blood loss but preliminary studies also suggest it decreases the risk of fibroid recurrence.8

Surgical technique

After the patient is prepped and draped in low lithotomy position with her arms tucked at her sides, drain the bladder with an indwelling catheter. Insert a uterine manipulator, such as the VCare (Conmed Corporation), into the uterus.

Obtain umbilical entry for a 30° optic scope, and place the patient in steep Trendelenburg position. We use two 5-mm lateral ports and one 12-mm suprapubic port. The level of placement of the lateral ports is tailored to the size of the fibroids; it can be anywhere from the level of the anterior iliac spine to the level of the umbilicus for fibroids contained in the pelvis or in the abdomen, respectively.

Uterine incision

After vasopressin injection, tourniquet placement, or permanent uterine artery occlusion is performed as described above, we advocate a transverse uterine incision. We do so mainly because:

  • The transverse incision runs parallel to the arcuate vessels of the myometrium, leading to less bleeding.
  • We suture from the lateral ports so the transverse incision facilitates a more ergonomic repair.

Perform the uterine incision (we use the Harmonic Ace [Ethicon Endo-Surgery, Inc]) through the uterine serosa deep toward the myoma. Incision size should be appropriate to the diameter of the fibroid; smaller incisions result in unnecessary struggling during enucleation of the fibroid. Incision depth should reach the fibroid capsule, and this incision should be developed over the entire fibroid. Tunneling in the myometrium is undesirable and should be avoided because it increases myometrial injury as well as the risk of hematoma.

Fibroid enucleation

Once the initial uterine incision is complete, enucleate the fibroid using a combination of traction, countertraction, sharp, and blunt dissection (see VIDEO 2). Pearls to successful enucleation include:

  • Maintain traction and countertraction when cutting tissue. This helps to identify appropriate planes and allows tissue to separate quickly, minimizing thermal energy spread.
  • Replace the tenaculum or myoma screw regularly at the border of the myoma and myometrium. The ultrasonic scalpel blade can be drilled into the myoma in order to create traction on the myoma.
  • Bluntly peel tissue from the myoma outward. Ideally all myometrium and vessels should stay with the uterus. A properly enucleated fibroid will be pearly in appearance and avascular.
  • Be particularly careful when in contact with the endometrium. Even submucous fibroids can be enucleated regularly without entering the endometrial cavity.

Uterine repair

If the endometrial cavity is inadvertently entered, close the defect (we use a 2-0 monocryl or Vicryl suture). Next, imbricate the endometrium over with successive layers, taking special care not to pass a needle into the endometrial cavity. In cases in which significant endometrial disruption cannot be avoided, use a postoperative intrauterine balloon stent. This is placed postoperatively and left in place for 2 weeks. To stimulate endometrial proliferation, we prescribe oral estradiol 1 mg twice per day for 4 weeks. Following endometrial stimulation, we prescribe a 10-day progestin withdrawal and ask the patient to return to the office for a flexible diagnostic hysteroscopy following her first menses to ensure cavitary integrity.

Once fibroid enucleation is complete, perform a multilayer closure of the defect using an absorbable, unidirectional barbed suture (V-Loc, Covidien). Eliminate all dead space in the closure. The last two throws of each barbed suture should be in the direction of the prior two throws to secure the suture. Finally, cut the suture at the tissue edge without leaving any trailing tail or knot.

Why use a barbed suture? The advantages of using absorbable barbed suture include:

  • elimination of knot tying
  • shorter closure time
  • better tension distribution throughout the wound.

Close the seromuscularis layer in a hemostatic baseball stitch fashion to minimize suture exposure and subsequent adhesions (FIGURE). Use of the suprapubic port for the needle retrieval device facilitates placement of the alternating “inside-out” baseball stitch (see VIDEO 3).


FIGURE Use of a hemostatic baseball stitch (with absorbable, unidirectional barbed suture) to close the seromuscularis layer of the uterus, thereby minimizing suture exposure and subsequent adhesions.

Morcellation

Mechanically morcellate the fibroids through the suprapubic port site. We use an electrical morcellator (Karl Storz Endoscopy). In cases of massive fibroids (>15 cm) we utilize cold- knife morcellation with a # 10 scalpel through an extended 3-cm suprapubic incision with a vertical fascial incision protected by a self-retaining wound retractor. It is important to be vigilant to remove all fibroid pieces as postoperative disseminated leiomyomatosis is well described.

Adhesion prevention

Myomectomy is notorious for creating dense and challenging postoperative adhesions. Given the high rate of repeat surgery for patients undergoing the procedure, anything you can do to limit the adhesion load will be appreciated by both your patient and her next surgeon. Without exception, the most important adhesion-prevention strategy is meticulous attention to tissue handling and hemostasis. In general, laparoscopy leads to fewer adhesions than laparotomy, but a bloody field and raw uterine serosa will create an environment ripe for adhesions regardless of surgical approach. If the operative field is dry, use commercial adhesion prevention aids according to manufacturers’ recommendations.

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