General gynae Flashcards
Types of contraception
MEC
Cat 1 - no restrictions
Cat 2 - advantages outweigh theoretical or proven risks
Cat 3 - theoretical or proven risks outweigh advantages
Cat 4 - Unacceptable health risk
- age, obesity, medical co-morbs, preg status, cancer
Types of IUCD
All levonorgestrel based
Jaydess: 13.5mg LNG, 6ug daily, 3 years
Mirena: 52mg LNG, 20ug daily, 5-8 years
- stops release of egg from ovary
- inhibits sperm from reaching/ fertilising egg
- thins lining of the uterus
- thickens cervical mucus
IUCD insertion and removal in pregnancy
If HCG +ve, IUCD should be removed
IF PP, insert after 6/52 to minimise risk of expulsion
Insert immediately after 1st/ 2nd trimester loss
IUCD insertion in PID
If acute PID, do not insert
If already inserted, continue
Types of progesterone only contraceptives
POP - noretistherone 350ug (noriday), desogestral 5ug/day (cerazette)
- cerazette more likely to inibit ovulation
Implant- etonorgestral 68mg, 3 yrs
Depot - medroxyprogesterone acetate every 13/52
96-99% effective
Special considerations in using progesterone only contraceptives
<18/ >45 DMPA - slight reduction in BMD
Review on a 2 year basis
Progesterone may potentiate: CVD risk factors, HTN, obesity, DM
IHD/ stroke - MEC 3
GTD (neg/ pos/ unresponsive HCG)- MEC 1
Types of combined hormonal contraceptives
COCP
- first line
- low dose ethinyl estradiol < 35ug and progesterone
- incr. VTE risk
Other routes: patch, ring
99% effective
Special considerations in prescribing CHCs
> 40: MEC 2. Can be used up to 50 if no CI
PP: breastfeeding <6/52: MEC 4
- 6/52 - 6/12 MEC 2
- Not BF: can be given after 3/52 if no RF (MEC 2)
<24/40 loss: can be given immediately
Smoker:
- <35: MEC 2
- >35: MEC 3/4
- Ex-smoker > 1 yr: MEC 2
Obesity:
- BMI 30-34: MEC 2
- BMI >35: MEC 3
Avoid in HTN
Prev obs chole - not CI, MEC 2
FHx VTE <45yrs: MEC 3
Surgical precautions and CHCs
Major surgery:
- stop COCP 3/52 before, restart 2/52 postop
Minor:
- no need to stop
Types of emergency contraception
Copper coil: 1-120 hours UPI or within 5/7 of ovulation
Oral progesterone:
- ullipristal acetate (19 norprogesterone): within 120 hours UPI
- 1/5mg LNG 0-72 hours UPI
Best emergency contraceptive if breastfeeding > 6/52
Progesterone only pill
Best emergency contraceptive if trophoblastic disease
CuIUCD
Sterilisation procedure female
Lap or hysteroscopic
Failure rate 2-5/1000
Increased risk of ectopic pregnancy
Reversal possible w TL
Drugs that are enzyme inducers
Rifampicin
Phenytoin
COCP
Phenobarbitone
Carbamazepine
Spironolactone
Sterilisation procedure male
Done under LA
Failure risk 1/2000
Effectiveness natural methods contraception
Requires regular cycle
80-98% effective
Features of female condom/ diaphragm
Need spermicide
Requires fitting
Reusable
Remain in situ 6 hours post intercourse but < 30
Not protective against STIs
92-98% effective
What to do if one missed pill (COCP)
Take the last pill you missed, even if it means taking 2 on1 day
Still protected from pregnancy
What to do if >1pill missed (COCP)
- protection against pregnancy may be affected
Should: - take the last pill you missed when remembered
- leave any earlier missed pills
- Carry on with the rest of the pack as normal
- use extra contraception for 7/7
At end of pack: - if 7+ pills left, finish the pack and start 7 day pill-free break as normal
- if <7 pills left, finish the pack and start a new pack right away
What to do if POP missed
Take as soon as possible
- noriday 3 hours
- cerazette 12 ours
Additional contraception. for 2/7 is required
Emergency contraception if UPI in the 2/7 after pill missed
Recommended interpregnancy window
1 year
< 1 yr assoc w increased adverse obstetric outcomes
Points on lactation amenorrhoea method
Caveats:
- exclusive BF
- <6/12 pp
- fully amenorrhoeic
to be 98% effective
IUD insertion and PP period
PPIUC: first 48 hours after CS, from 10min after delivery of placenta
Expulsion 0-17%
Complications: uterine perf, infection
Follow up 4-6/52 post
Emergency contraception in PP period
UPI 21/7 after childbirth - is indicated
EllaOne doubled if BMI>35, or on enzyme inducers
Must stop breastfeeding for 1/52
Progesterone contraceptives in PP period
Safe
Depo and POP can be started immediately after childbirth
When can COCP be prescribed postpartum
Generally >6/52
- <3/52 and VTE risk factors = MEC4
- <3/52 and no VTE risk factors = MEC 3
- 3-6/52 and VTE risk factors = MEC 3
- 3-6/52 and no VTE risk factors = MEC 2
- > 6/52. = MEC 1
COCP preventative effects Ca
Ovarian CA
- risk reduction by 30-35%
- <6/12 use provides protection
Endometrial CA
- risk reduction by 50%
Colorectal CA
- risk reduction by 40% if used for >96 months
COCP non-contraeptive benefits - gynae disorders
Functional ovarian cysts
- prevent ovulation –> cyst reduction
Endometriosis
- reduction of menstrual blood flow
Fibroids:
- determined by estrogens. Anti-estrogenic affect of progestergens. protective against fibroids
Therapeutic non-contraceptive benefits of COCP
HMB
- reduces blood loss 50%
Dysmenorrhoea
- ovulation suppression
PMS
- Ovulation suppression
Endometriosis
- reduced menstrual flow
Acne:
- reduced steroid production
Diagnosing severe PMS
Prospective recording. of sx over 2 cycles w sx diary
Definitive dx w 3/13 GnRH analogues if sx diary not conclusive
Simple measures for managing PMS
COCP
Vit B6
SSRI
Management options for severe PMS
Integrated holistic approach
CBT if severe
Hormonal: drospirenone COC 1st line, lowest possible dose progesterone
Danazol - breast symptoms (irreversible. virilising effects)
GnRH analogues - w most severe symptoms only. LT use needs yearly dexa scan
Non-hormonal - SSRIs, spironolactone
Pre-pregnancy counselling (sx abate at pregnancy)
TAH + BSO - coonsider test of cure w GnRH first and ensure HRT tolerated
Treatment algorithm for PMS
First line:
- Exercise, CBT, Vit B6
- COCP
- Continuous or luteal (D15-D28) low dose SSRi
Second line:
- Estradiol patches + micronised progesterone D17-28/LNGIUS
- Higher dose SSRI continuously or luteal phahse
Third line:
GnRH. analogues and add-back HRT(continous combined estrogen + progesterone)
Fourth line:
- surgical rx +/- RHT
Prevalence of PCOS
10-15%
Symptoms of PCOS
Menstrual disturbance
Hyperandrogenism: acne, hihrsuitism, alopecia
Fertility problems
Obesity
Psychological
Longterm sequelae of PCOS
Type II DM
Dyslipidaemia
HTN
CVS disease
Endometrial Ca
Diagnosis of PCOS
Rotterdam criteria - must have 2 of 3
- oligomenorrhoea and/or anovulation
- clinical and/or biochem hyperandrogenism (low SHBG, free testosterone mildly elevated)
- PCO on USS: >/= 122 follicles measuring 2-9mm +/-increased ovarian volume
NB diagnoses to exclude before dx PCOS
Cushings
Androgen secreting tumour
Thyroid dysfx
CA
Hyperprolactinaemia
Serum endocrinology findings in PCOS
Inc or normal androgens (free testosterone and androstenedione)
Inc or normal LH (elevated in 40%, usually slim women)
Normal FSH
Inc or normal fasting insulin - not routinely measured; GTT done to screen for insulin resistance
Reduced or normal SHBG –> results in elevated “ free androgen index”
Inc or normal estradiol
Increased AMH
Pathophysiology of PCOS
Maybe genetic
Raised ovarian androgens –> multple follicles and PCO appearance
Increased LH –> increased androgen production
Decr SHBG - causing hihghh circulating freeandrogens
- levels inversely proportional to BMI
Insulin augments LH activity –> inc. resistance, incr LH activity –> inc ovarian androgens.
Investigations for PCOS
USS
Bloods: HCG, FSH, LH, PRL, am 17-hydroxyprogesterone, glucose, lipids, free testosterone, SHBG
* incr LH:FSH ratio
Rx for PCOS related hirsuitism
Dianette - ethinyloestradiol 35ug and cyproterone avetate 2mg (antiandrogen)
Estrogens –> incr SHHBG
- dianette can also help w acne
Managing PCOS related infertility
40-50% overweight
Ovulation at 6/12 - BMI <25 = 79%, BMI >35 = 12%
Clomiphene (antioestrogen) at D2-6 for ovulation induction
- 6/12 trial - monitor in first cycle w serial US and progesterone
Follicle tracking - conception rate 40%
Ovarian drilling: decr LH and inc SHBG - lower risks of multiple/ OHSS
- elevated FSH = good prognostic amrker
Managing PCOS related menstrual disturbances
Cyclical COCP/ medroxyprogesterone 10mg for 12/7 every 3/12 for at least 4 bleeds
- menstrual shedding NB to avoid hyperplasia
If not eager for cyclical hormones/ oligomenorrhoeic - US for ET every 6-12/12
- ET >10mm –> artificially induce bleed
- mirena for endometrial protection
Metformin 850mg bd - 8% conception rate. Used D2-6. Decreases circulating androgens and improves ovulation in those w BMI >25 and no response to clomid
Eg. benign ovarian mass
Functional cyst
Endometriomas
Serous cystadenoma
Mucinous cystadenoma
Mature teratome
Benign non-ovarian tubal masses
Paratubal cyst
Hydrosalpinges
Tubo-ovarian abscess
Peritoneal pseudocysts
Appendiceal abscess
Diverticular abscess
Pelvic kidney
Primary malignant ovarian mass
Germ cell tumour
Epithelial carcinoma
Sex-cord tumour
Secondary malignant ovarian masses
Predom breast of GI carcinoma
Bloods required in all women <40 w complex ovarian mass
LDH
AFP
HCG
Risk of Malignancy index
RMI = U x M x Ca 125
U - ultrasound features: multilocular cysts, solid areas, metastases, ascites, bilateral lesions
U = 0 (no signs)
U= 1 (1 sign)
U = 3 (2+ signs)
M - menopausal status
Pre= 1
Post = 3
* RMI> 200 = high risk
IOTA group ultrasound rules: B-rules vs M-rules
B-Rules : benign
- unilocular cyst
- presence of solid components where the largest solid component <7mm
- Presence of acoustic shadowing
- smooth multilocular tumour w largest diameter <100mm
- no blood flow
M-RUles: Malignant
- irregular solid tumour
- ascites
- at least 4 papillary structures
- irregular multilocular solid tumour with largest diameter >100mm
- very strong blood flow
Management of ovarian cyst
Simple cyst < 50mm - no follow up, will likely resolve spont
Simple cyst 50-70mm: yearly follow up
Simple cyst >70mm: further imaging/ surgery
Persisting cyst - surgery
Surgical approaces:
- lapasoscopic : benign
- laparotomy : large solid (eg dermoids)
- avoid rupture of spillage
- oophorectomy - discuss preop
- aspiration: less effective and assoc w high rates of recurrence
Causes of adnexal masses in pregnancy
Corpus luteal cyst
Follicular cyst
Haemorrhagic cyst
Hyper-stimualted ovaries
Hyperreactio luteinalis
Luteoma of pregnancy
Heterotopic pregnancy
Mature cystic teratome
Malignant germ cell tumour
PID
Appendiceal mass
Defn and risks with luteoma of pregnancy
Luteinised stroma cells replace the ovarian parenchyma
Incr androgen production
Androgens cause maternal virilisation in 25-30%
50% risk fetal virilisation