Laparoscopic salpingo-oophorectomy for ovarian torsion in the third trimester
© Springer-Verlag Berlin Heidelberg 2012
Received: 16 October 2012
Accepted: 27 October 2012
Published: 9 November 2012
Ovarian torsion is uncommon in pregnancy, with incidence estimated between 1 and 10 per 10,000 pregnancies [1–3]. Furthermore, available case series estimate that ovarian torsion presents in the third trimester (i.e., after 28-weeks gestation) in 0–22 % of cases [2, 4, 5]. In contrast to those who present in the first two trimesters, patients who present with concern for ovarian torsion in the third trimester may be more likely to undergo laparotomy rather than laparoscopy due to limited exposure allowed by the gravid uterus.  Upon literature review, we were able to identify only one report of laparoscopic salpingo-oophorectomy in the third trimester, though the details of the procedure were not provided . We also identified case reports of third-trimester ovarian  and tubal  torsion treated laparoscopically without removal of adnexal structures. We herein report in detail and discuss a successful laparoscopic left salpingo-oophorectomy for ovarian torsion presenting in the 29th week of pregnancy.
A 30-year-old gravida 3 para 1 presented to our institution at 28 weeks, 5 days’ gestation for evaluation of sudden-onset left lower quadrant pain that woke her from sleep early in the morning. Aside from minimal nausea, a complete review of systems was negative. The patient had no prior surgical procedures; medical history was notable for depression, well-controlled on bupropion. On physical examination, the patient was afebrile with normal vital signs and marked tenderness over the left adnexa.
Sonographic evaluation of the pelvis revealed a 4.9 × 2.2 × 2.6-cm left ovary, containing a 2.7 × 2.4 × 1.9-cm complex cystic mass. Assessment of arterial and venous Doppler flow to the ovary could not be performed due to overlying vascularity of the adnexal mass. The right ovary was unremarkable. Cervical length was 2.8 cm, there was no sonographic evidence of abruption, and the fetal portion of the exam was within normal limits with biophysical profile 8 points out of 8. Based on clinical and laboratory findings, ovarian torsion was felt to be more likely than other causes of acute lower abdominal pain in this patient, e.g., appendicitis, nephrolithiasis, placental abruption, or preterm contractions.
Obstetrics and anesthesiology consultations were obtained with plan made for diagnostic laparoscopy and possible ovarian detorsion versus salpingo-oophorectomy. She was positioned in the left lateral decubitus position and continuous fetal heart rate monitoring was initiated. Equipment for emergency cesarean delivery and neonatal resuscitation was immediately available. Rapid-sequence induction of anesthesia with endotracheal intubation was performed. An orogastric tube was placed to decompress the stomach. The patient received appropriate preoperative antibiotic and venous thromboembolism prophylaxis.
After standard preparation and draping of the abdomen, the left costal margin and the uterine fundus were outlined to assist with port placement. A 5-mm incision was made just below the inferior costal margin on the left, in the midclavicular line. A 5-mm port was inserted into the peritoneal cavity under direct laparoscopic vision and, after abdominal access was visually confirmed, the abdomen was insufflated to 15 mm Hg with carbon dioxide gas. The patient was then tilted to the right to facilitate movement of the uterus away from the affected adnexa.
The LigaSure device (Covidien, Mansfield, MA) was used to perform a left salpingo-oophorectomy in standard fashion. Blood loss was minimal. The fallopian tube and ovary were removed from the abdomen without spillage using the 10-mm EndoCatch (Covidien, Mansfield, MA) retrieval bag and sent for permanent section. The abdomen was desufflated and the port sites closed in the usual manner. Fetal heart rate during the entire procedure was between 110 and 120 bpm with minimal variability consistent with general anesthesia.
The patient was brought to the Labor and Delivery Unit for postoperative monitoring. She was discharged without complication on postoperative day 2. Final pathology showed a mature, cystic teratoma, as well as hemorrhagic fat necrosis, consistent with ovarian torsion.
Ovarian torsion in the third trimester is uncommon, and laparoscopic treatment of torsion at this stage of pregnancy requires the surgical team to address fetal, maternal, and technical aspects of this procedure. First, we recommend intraoperative assessment of fetal heart rate with obstetrics and neonatology consultations obtained prior to surgery to ensure that the appropriate resources are available should emergency cesarean delivery become necessary. Postoperatively, the patient should be monitored per institutional protocol for laparoscopic surgery and cardiotocography should be utilized to screen for fetal distress and preterm labor prior to discharge.
Second, standard anesthesia procedures for laparoscopic surgery in a pregnant patient should be utilized, including rapid-sequence induction and intubation, gastric decompression, and avoidance of hypercapnia. Moreover, careful attention should be paid to lateral displacement of the gravid uterus away from the vena cava as there is a risk of decreased venous return beyond that expected from pneumoperitoneum alone. In this case report, torsion of the left ovary required the patient to be in the supine position during the salpingo-oophorectomy; time spent without leftward tilt was minimized. In addition, given the importance of minimizing maternal and fetal exposure to surgical anesthesia, the procedure was completed laparoscopically only because we felt that we could use this approach safely and expeditiously. As mentioned above, equipment was immediately available for conversion to laparotomy.
Finally, when considering laparoscopic assessment for and treatment of ovarian torsion in the third trimester, we recommend conscientious placement of trocars to avoid vascular or uterine injury from the insufflation needle. In this case, direct left upper quadrant subcostal port placement under visualization was sufficient to allow for adequate operating space and avoidance of organ injury. Conversion to an open approach may be necessary if visualization remains limited. Salpingo-oophorectomy may be considered if there is any concern for ovarian necrosis after initial detorsion given the theoretical possibility of adverse obstetric sequelae (e.g., preterm labor) if there is subsequent inflammation or infection of the adnexa
In summary, although uncommon, ovarian torsion in the third trimester may be treated laparoscopically in selected cases with appropriate technical modifications and interdisciplinary consultation.
Declaration of interest
The authors report no conflicts of interest. The authors alone are responsible for the content and writing of the paper.
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