7. Mechanical Factors.
They prevent passage of facilitated ovum into
the uterine cavity, e.g. prior tubal surgery coufers
the highest risk. After one ectopic pregnancy the
chance of another is 7 to 15%
Previous salpingitis causes agglutination of the
mucosal folds with narrowing a formation of
pockets also causes reduced ciliation due to
infection. Clamydia tracomatis infection is the
commonest.
8. In utero exposure to dietylstilbestrol predisposes to
developmental tubal abnormalities.
Previous Cesarean Section.
9. Functional Factors
Cause delay passage of the fertilized ovum into the
uterine cavity e.g. progesterone only contraceptives,
IUCD, post-ovulatory high-dose estrogen to prevent
pregnancy e.g. ECPs, ovulation induction.
10. Assisted reproduction
Ectopic Pregnancy increase follow gamate
intrafallopian transfer (GIFT) and In Vitro Fertilization
(IVF)
Failed Contraception
Induce in IUCDs, tubal sterilization, progesterone
only
11. Epidemiology
There has been a increase in both the absolute no and
rate of ectopic pregnancy.
Non-white women have above 1.4 times more chances
than white.
12. Causes for increase Ectopic
Pregnancy Rates
High prevalence of STIs.
Earlier diagnosis with sensitive x-rays for chronic
gonadotropin and TVS
Induced abortion followed by infection
High use of ARTs
Tubal surgery
14. Anatomical Changes
Zygote Implantation
Fertilised ovum burrows the epithelium and zygote
comes to lie in the muscular wall because the tube
lacks a submucosa. Proliferative trophoblast invades
and erodes the subject mucosants opening maternal
vessels. embryo and fetus in an ectopic pregnancy is
often absent or stunted.
15. Uterine Changes
Some changes associated with early normal
pregnancy.
Endometrial Changes
Enlarged epithelial with in nuclei that are
hypatrophic, hyperchromadic cellular and
irregular shaped Aria-stella reaction.
External bleeding normally occurs in cases of
tubal pregnancy and is uterine origin from
degeneration and slough of the uterine decidue.
16. Natural History of Tubal
Pregnancy
Tubal Abortion:
Common in ampullary tubal pregnancy.
Tubal rapture:
As a rule rapture in the 1st few weeks pregnancy is in the
isthimic portion of the tube. Rupture is usually
spontaneous or can be caused by trauma also associated
with coitus, with intraperitoneal rupture, the entire
rupture may be extruded from the tube or if the vent is
small profuse hemorrhage may occur.
Concentrates if small may be reabsorbed or if large
remain in cul-de-sac for years as an encapsulated mass or
even become captured to form a lithopedion.
17. Abdominal Pregnancy
Follows rupture or abortion
Broad-ligament Pregnancy
Implantation is towards mesosalphinx and based
between folds of broad ligament.
18. Interstitial Pregnancy
Implantation with the tubal segment penetrates the
uterine wall results in an interstilial or cornual
pregnancy. Haemorrhage can be fatal rapidly
Heterotrophic gestation – Ectopic pregnancy co-exist
with IUP.
Clinical and Laboratory features of Tubal Pregnancy.
Clinical diverse and depends on whether rupture has
occurred
19. In classical cases here, vaginal bleeding amenorrhea/lower abdominal pain,
others – vasomotor disturbances e.g. vertigo, syncope
Tender abdomen on palpation and vaginal exams elicits cervical motion
tenderness
Post fornix may bulge because of blood in the cul-de-sac tender boggy mass
Diaphragmatic Irritation with pain at shoulder/neck.
With rupture signs/symptoms of shock.
Before rupture – vital signs are normal. if bleeding continues hypotension
tachycardia
Culdocentesis simple technique for identity haemopert
20. Laboratory tests
Hb, haemotocrit, leucocyte count.
Chronic Gonadotropin Assays;
BHCG – markedly reduced concentrations compared
with normal pregnancy.
Urinary pregnancy tests.
Serum progesterone – single progesterone can be to
establish presence of developing pregnancy
22. Surgical Diagnosis
Curettage to differentiate between threatened
abortion an incomplete and tubal pregnancy
Laparascopy
Laparatomy
Treatment and prognosis of tubal pregnancy.
Technical advances with earlier diagnosis and
treatment of high risk when women have
allowed definitive management of an unruptured
ectopic pregnancy even before clinical
symptoms.
23. Surgical Management
laparascopy is preferred over laparatomy unless
patient is unstable even though reproductive
outcome is similar. Laparoscopy is more cost-
effective.
24. Tubal surgery is divided
into:
Conservative tubal salvage e.g. salpingostomy,
salpingotomy and expression of pregnancy
Radical surgery – salpingectomy
Medical Treatment
Use of methotrexate.
