Obstetrics and Gynecology Flashcards
What is primary amenorrhea?
no menses by age 13 with an absence of secondary sexual characteristics; no menses by 15 with normal growth secondary sex
What are the causes of primary amenorrhea?
pregnancy, imperforate hymen, gonadal dysgenesis (turner’s syndrome), HPO axis abnormalities (anorexia, bulimia, weight loss, excessive exercise)
How is primary amenorrhea dx?
quantitative BHCG, FSH, prolactin, TSH, T3, free T4, estrogen, progesterone
What is secondary amenorrhea?
the absence of menses for 3 mo in women with previously normal menstruation or 6 mo in a women with a history of irregular cycles
What are the causes of secondary amenorrhea?
pregnancy, endometrial atrophy, premature ovarian failure, pituitary dysfunction, drug use, herbals, hormonal medications, stress, extreme weight changes, eating disorders, excessive exercise
How is secondary amenorrhea dx?
quant BHCG, TSH, prolactin if >200 CT of sella, progesterone challenge, FSH
What is the tx for amenorrhea?
treat underlying cause, use OCPs, cyclic progesterone 10 mg for 10 days
What is pelvic inflammatory disease?
infection that ascends from the cervix or vagina to involve the endometrium and/or fallopian tubes
What are the characteristics of pelivc inflammatory disease?
- causative agents include gonorrhea and chlamydia
- chandelier sign (cervical motion tenderness)
- common symptoms include pelvic pain and fever, there may be vaginal discharge (cervicitis)
- complications: infertility, ectopic pregnancy, tube-ovarian abscess (adnexal mass)
What are the clinical findings of pelvic inflammatory disease?
direct abdominal tenderness, cervical motion tenderness, and adnexal tenderness plus 1 or more of the following:
- temperature >38 C
- WBC count >10,000/mm3
- pelvic abscess found by manual examination or ultrasonography
What is the outpatient tx of pelvic inflammatory disease?
ceftriaxone IM 250 mg once + PO doxycycline 100 mg BID x 14 d+/- PO flagyl 500 mg BID x 14 d
What is the inpatient tx of pelvic inflammatory disease?
- severely ill or nausea and vomiting precludes outpatient management
- consider hospitalization if the diagnosis is uncertain, ectopic and appendicitis cannot be rules out, pregnancy, pelvic abscess suspected, HIV positive, unable to follow or tolerate outpatient regimen or failed to respond to outpatient therapy
- doxycycline + IV cefotetan or cefoxitin x 48 hours until the condition improves, then PO doxycycline 100 mg BID x 14 d
- clindamycin + gentamicin daily, if normal renal function, x 48 h until the condition improves, then PO doxycycline 100 mg BID x 14
What is dysfunctional uterine bleeding?
defined as excessive uterine bleeding with no demonstrable organic cause
What is menorrhagia?
prolonged/heavy bleeding (>7 days or 80 mL); regular intervals
What is metrorrhagia?
variable amounts of bleeding at irregular, frequent intervals
What is menometrorrhagia?
more blood loss during menses and frequent and irregular bleeding between menses
What is polymenorrhea?
menses that occur more frequently (menses <21 days apart)
What is oligomenorrhea?
menses that occur less frequently (>35 days)
What are the causes of dysfunctional uterine bleeding?
Reproductive tract disease = pregnancy, gastational trophoblastic disease, uterine lesions, iatrogenic causes (IUDs, contraception, HRT, psychotropic agents)
- uterine lesions: menorrhagia or metrorrhagia d/t increase in endometrial surface area/distortion of vasculature/having friable or inflamed surface = includes endometrial CA/sarcoma, endometrial hyperplasia, submucosal fibroid, enometrial polyps, endometritis, adenomyosis
- systemic disease = blood dyscrasias (vWD, prothrombin deficiency, leukemia, severe sepsis), hypothyroidism, hyperthyroidism, cirrhosis
- hypothyroidism assocaited with menorrhagia or metorrhagia; hyperthyroidism associated with oligomenorrhea and amenorrhea
- cirrhosis can cause excess bleeding d/t low plts and less metabolization of estrogens
- endocrine causes = anovulatory vs ovulatory DUB
- anvolutatory:
- continous production of estradiol-17 beta without corpus luteum formation and no progesterone release
- unopposed estrogen = continous proliferation of endometrium which eventually outgrows its blood supply and sloughs of in an irregular unpredictable pattern
- ovulatory:
- mid-cycle spotting after LH surge
How is dysfunctional uterine bleeding dx?
- rule out pregnancy
- med reconciliation
- PE = thyromegaly, hepatomegaly, GU infection, GI problems (hemorrhoids), pelvic structural abnormalities (polyps, fibroids)
- labs = FSH, LH, prolactin, estradiol, testosterone, TSH, T3, T4, DHEAS, coags
- eval of uterus = endometrial biopsy or hysteroscopy, pelvic US
- uterine dilation and curettage (GOLD STANDARD): especially when done with hysteroscopy, uterine dilation, and curettage can be diagnostic and therapeutic
What is the tx for dysfunctional uterine bleeding?
- structural problems can be corrected surgically = D and C (therapeutic and dx), hysteroscopy, endometrial ablation, hysterectomy
- OCPs can regularize cycles
- IV estrogen can be used acutely if pt is presenting with acute hemorrhage d/t DUB
- NSAIDs reduced menstrual blood loss
What is pelvic pain/dysmenorrhea?
refers to uterine pain around the time of menses, which can either be primary or secondary
-commonly found in those who ovulate regularly; pain usually lasts 1-2 days and is relieved by NSAIDs and OCPs
What is pelvic pain/dysmenorrhea assocaited with?
associated with endometriosis: pain begins prior to menses
- pain isn’t relieved by NSAIDs and OCPs
- often have dyspareunia as well
What is primary dysmenorrhea?
begins w/in 6-12 mos of menarche
What is the patho of primary dysmenorrhea?
due to excess PG and leukotriene production at menstruation = increased uterine contraction
- blood vessels are vasoconstrictor = decreased blood flow
- Ischemia from contraction can cause pain
What are the sxs of primary dysmenorrhea?
severe cramp that start with menses and last 2-3 days (highest in the first day), lower abdominal pain that radiates to back thighs, h/a, nausea, diarrhea
What is the PE of primary dysmenorrhea?
normal
What is the tx for primary dysmenorrhea?
NSAIDs= first line, OCPs (prevent ovulation), menstrual suppression, surgical (endometrial resection)
What is secondary dysmenorrhea?
(pathologic cause)
- painful menstruation caused by clinically identifiable cause
- etiology: endometriosis, adenomyosis, polyps, fibroids, PID, IUD, tumors, adhesions, cervical stenosis/lesions, psych
- pain with menstruation begins mid-cycle and increases in severity until end
- common women age (20-40s)
What is the tx of secondary dysmenorrhea?
treat underlying cause
What is an ectopic pregnancy?
implantation of pregnancy somewhere other than the uterine cavity = 95% in the Fallopian tube (55% in the ampulla of the tube)
What are the classic features of an ectopic pregnancy?
abdominal pain, bleeding, and adnexal mass in a pregnant woman
What is the MC cause of an ectopic pregnancy?
occlusion of tube secondary to adhesions
What are the risk factors of an ectopic pregnancy?
history of previous ectopic, previous salpingitis (caused by PID), previous abdominal or tubal surgery, used of IUD, assisted reproduction, smoking
What is a ruptured ectopic pregnancy?
medical emergency
-severe abdominal or shoulder pain, peritonitis, tachycardia, syncope, orthostatic HTN
How is an ectopic pregnancy dx?
- Beta HCG is >1,500, but no fetus in utero
- serial increases of betaHCG are less than expected (should double every 2 days); get baseline BetaHCG and follow-up hormone levels in 48 hours - if they are sub optimally rising (not doubling) then it is likely an ectopic pregnancy
- when betaHCG is >1,500 = should show evidence of developing intrauterine gestation on ultrasound = if not, suspect ectopic transvaginal US >90% sensitive (IUP visible by 5-6 weeks)
- ultrasound = ring of fire sign: the ring of fire sign also known as ring of vascularity signifies a hypervascular lesion with peripheral vascularity on color or pulsed doppler examination of the adnexa due to low impedance high diastolic flow
What’s the tx for an ectopic pregnancy?
methotrexate = only if beta HCG <5,000, ectopic mass is <3.5 cm, no fetal heart tones, hemodynamically stable, no blood disorders, no pulmonary disease, no peptic ulcer, normal renal function, normal hepatic function, compliant pt that can return for follow up
- administration fo methotrexate is the appropriate treatment for an ectopic pregnancy unless there are contraindications to use the drug
- these contraindications include current breast-feeding, active pulmonary disease, immunodeficiency, or hypersensitivity to methotrexate
- the drug is a folic acid antagonist that inhibits DNA replication
- the effectiveness of administration is similar to surgical treatment without the risk of surgical complications
- Indications for methotrexate therapy include a hemodynamically stable patient, hCG levels below 5,000 IU/L, mass <3.5 cm, no fetal cardiac activity, and the ability to comply with post-treatment follow-up
- methotrexate can be administered intravenously, intramuscularly, or orally
- It can also be injected into the ectopic pregnancy directly, although this route of administration is not commonly used
- Intramuscular administration is the route of administration that is most commonly used for the treatment of ectopic pregnancy
- surgical treatment: laparoscopy salpingostomy = emergent situations (rupture) or patient not meeting methotrexate criteria
- follow-up testing = crucial
What is placenta abruption?
premature separation of all/section of otherwise normally implanted placenta from the uterine wall after 20 weeks of gestation resulting in hemorrhage
What are the characteristics of placenta abruption?
- MC cause of third trimester bleeding
- risk factors for placental abruption include trauma, smoking, hypertension, preeclampsia, and cocaine abuse
- primary cause: unknown - maternal HTN, prior history of abruption, maternal cocaine use, external maternal trauma, rapid decompression of over distended uterus
- presents as heavy painful vaginal bleeding in the 3rd trimester with severe abdominal pain and/or frequent strong contractions (30% have no symptoms)
- physical exam: vaginal bleeding and firm tender uterus with small frequent contractions, 20% present with no bleeding (concealed hemorrhage)
How is placenta abruption dx?
the diagnosis is always clinical, ultrasound is minimally helpful but is usually ordered
- ultrasound may show retroplacental blood collection
- blood-stained amniotic fluid in the vagina
- abruption signs evidence by fetal heart rate, uterine activity
- decelerations may indicate fetal hypoxia, bradycardia
How is the tx for placenta abruption?
delivery of the fetus and placenta is the definitive treatment, blood type, crossmatch and coag studies as well as placement of large-bore IV line
- emergent delivery = vaginal/cesarean, as indicated
- corticosteroids as indicated to enhance fetal lung maturity
- expectant management for small abruptions
What is endometriosis?
presence of endometrial tissue outside endometrial cavity - MC found in ovary and pelvis peritoneum
- sometimes transported to the lymphatic system (retorgrade menstruation)
- the severity of symptoms does not equate to the amount of endometriosis
What are the theories of DZ for endometriosis?
- retrograde menstruation (most likely): endometrium floats back out of the Fallopian tubes onto ovary/into the cul-de-sac
- hematogenous/lymphomatous spread
- celomic metaplasia
- can happen as a result of an obstructive anomaly (imperf. Hymen, transverse septum/longitudinal septum, cervicl anagenesis)- once the obstruction is removed, the endometriosis usually resolves
What are the risk factors of endometriosis?
early menarche, short cycles, heavy/prolonged cycles, early menarche, prolonged menses, Mullerian anomalies, family history, autoimmune history
-protective: multiparty, longer lactation, regular exercise
What are the sx of endometriosis?
The “THREE D’s” - dyspareunia, dyschezia (difficulty in defacating), and dysmenorrhea
- cyclic pelvis pain peaking 1-2 days before the onset of menses
- Infertility
- many women are asymptomatic
- the amount of endometriosis doesn’t correlate to pain (depth of implantation correlates better)
- decrease in pain w/surgical excision/ablation/cauterization
What is the PE of endometriosis?
uterus is fixed and retoflexed
-tender nodularity of cul de sac and uterine ligaments