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Ectopic Pregnancy

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http://decode-medicine.blogspot.com/2011/03/ectopic-pregnancy.html

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Ectopic Pregnancy

  1. 1. Ectopic Pregnancy<br />N Engl J Med 2009;361:379-87.<br />
  2. 2. Ectopic pregnancy, the implantation of a fertilized ovum outside the endometrial cavity, occurs in approximately 1.5 to 2.0% of pregnancies and is potentially life-threatening.<br />The Clinical Problem <br />
  3. 3. Damage to the fallopian tubes from pelvic inflammatory disease,previous tubal surgery, or a previous ectopic pregnancy is stronglyassociated with an increased risk of ectopic pregnancy.<br />Minorrisk factors include a history of cigarette smoking, an ageover 35 years, and many lifetime sexual partners.<br />Women who are subfertile, the use of assisted reproductivetechniques, especially in vitro fertilization, increases therisk of ectopic pregnancy. <br />Half of all women who receive a diagnosis of an ectopicpregnancy do not have any known risk factors.<br />Risk Factors <br />
  4. 4. The symptoms and signs of ectopic pregnancy include first-trimesterbleeding (which is typically intermittent, light, and eitherbright or dark red and which rarely exceeds the normal menstrualflow), crampy abdominal or pelvic pain (which is unilateralor diffuse and ranges from mild to debilitating), or both. <br />Patients with a ruptured ectopic pregnancy present with signsof shock, including hypotension, tachycardia, and rebound tenderness,and they should be treated on an emergency basis.<br />Evaluation <br />
  5. 5. Un-ruptured ectopic pregnancy can be diagnosed rapidly and accurately with the use of transvaginalultrasonography in conjunction with a quantitative serum human chorionic gonadotropin (hCG) test. <br />The first is to determine whether the gestation is potentially viable; if not, the location of the pregnancy should be determined. <br />Ultimately, a growing intrauterine pregnancy, a nonviable intrauterine pregnancy (miscarriage), or an ectopic pregnancy will be diagnosed. <br />Evaluation <br />
  6. 6. In gestations longer than 5.5 weeks, a transvaginalultrasonographic examination should identify an intrauterine pregnancy with almost 100% accuracy.<br />Approximately 25 to 50% of women with an ectopic pregnancy initially present with a pregnancy of unknown location, and approximately 7 to 20% of women with a pregnancy of unknown location ultimately receive a diagnosis of an ectopic pregnancy.<br />Ultrasonographic Examination <br />
  7. 7. Normal intrauterine pregnancy<br />Nonviable intrauterine pregnancy<br />Ectopic (tubal) pregnancy<br />Ultrasonographic Findings in Ectopic Pregnancy<br />
  8. 8.
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  11. 11. A<br />Early gestational sac in the uterus without a yolk sac or fetal pole in an intrauterine pregnancy. The gestational sac has a diameter of 0.65 cm and is consistent with a gestational age of 5 weeks 2 days.<br />
  12. 12. B<br />Pseudo-gestational sac that resembles the gestational sac, but it is centrally located, it is not symmetric, and it is associated with septation.<br />
  13. 13. C<br />A gestational sac and a yolk sac with evidence of associated free fluid.<br />
  14. 14. D<br />Ring sign — a hyperechoic ring around an extrauterine gestational sac.<br />
  15. 15. E<br />Ectopic pregnancy characterized by an extrauterine adnexal mass, <br />separate from the ovary, without any evidence of a gestational sac. <br />The mass is 2.2 by 2.2 cm.<br />
  16. 16. Correlation of Ultrasonographic Findings with hCG Values <br />The “discriminatory hCG value” has been reported to be between1500 and 3000 mIU/ml, which can be used to determine the level of hCG at which the sensitivity of ultrasonography for the detection of intrauterine pregnancy approaches 100% and at which the absence of an intrauterine pregnancy suggests abnormal or ectopic gestation.<br />
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  18. 18. Change in the hCG Level in Intrauterine Pregnancy, Ectopic Pregnancy, and Spontaneous Abortion.<br />An increase or decrease in the serial hCG level in a woman with an ectopic pregnancy is outside the range expected for that of a woman with a growing intrauterine pregnancy or a spontaneous abortion 71% of the time. However, the increase in the hCG level in a woman with an ectopic pregnancy can mimic that of a growing intrauterine pregnancy 21% of the time, and the decrease in the hCG level can mimic that of a spontaneous abortion 8% of the time.<br />
  19. 19. In women hCG levels are decreasing, serial hCG measurements should be performed until hCG is no longer detectable in the serum. <br /> In women an intrauterine gestation has not been confirmed remain at risk for rupture of an ectopic pregnancy until there is no detectable hCG. <br />In patients with hCG levels that are increasing, ultrasonographic examination should be performed, or repeated, when levels have risen above the discriminatory value. <br />Correlation of Ultrasonographic Findings with hCG Values <br />
  20. 20. Surgical Management<br />Salpingectomy or Salpingostomy<br />Medical Management <br />Intramuscular administrationof the Methotrexate<br />single-dose or multidose regimen<br />Management<br />
  21. 21. Surgical treatment may involve removing the affected fallopian tube (salpingectomy) or dissecting the ectopic pregnancy with conservation of the tube (salpingostomy). <br /> Laparoscopy is cost-effective and is the preferred surgical approach.<br />Laparotomy is reserved for patients with extensive intraperitoneal bleeding, intravascular compromise, or poor visualization of the pelvis at the time of laparoscopy. <br />Postoperative serial monitoring of hCG values is required after salpingostomy because trophoblastic cells remain in the fallopian tube in 5 to 20% of women. <br />Surgical Management<br />
  22. 22. Medical management of ectopic pregnancy with intramuscular administration of the folic acid antagonist methotrexate is a commonly used and safe alternative to surgical management.<br />Medical Management <br />
  23. 23. Factors that are associated with failure of medical management include initial hCG > 5000 mIU/mL, ultrasonographic detection of a moderate or large amount of free peritoneal fluid, the presence of fetal cardiac activity, and a pretreatment increase in the serum hCG > 50% over a 48-hour period.<br />Medical Management <br />
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  25. 25. Data from randomized trials are lacking to inform the optimal management of ectopic pregnancy (surgical vs. medical) with respect to recurrence rates or the potential for future fertility.<br />Surgical versus Medical Therapy<br />

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