normal changes during pregnancy Flashcards
(33 cards)
does demand on the heart increase or decrease
increase the load on the hard due to higher O2 demand.
Cardiac output up or down
cardiac output increases. there is hyper trophy and heart chambers enlarge. increasing cardiac output by 40 percent
does BP go up or down
Bp reduced by mid-pregnancy
why are woman prone to uti
because uterer walls become relaxed and bigger- sometimes stasis occurs– profillation of bacteria can occur
what happens to respiratory function
increase of tidal volume by 40 percent. compression of the diaphragm also leading to an increase in RR and compression of the alveoli.
renal system
increased in progesterone
increase in vasodilation, increase in GFR.
renal
what happens with increased GFR
increase in urine production. increase in urine output. increase of urine means increase of fluid in the ureter..
decrease in ureter mobility
bacterial colinisation, nephritis, UTI
decrease smooth musle in GI system
- increased progesterone causes.
-decrease in smooth muscle tone, which causes a decrease in GI motility and a decrease in the lower oesophageal sphincter. increase in gastric pressure, this causes an increase in reflux
decrease in gallbladder mobility
this causes bile to become stagnant.
there is also an increase in estrogen and cholesterol increasing the risk of choleostasis
What does CHC stand for?
Combined Hormonal Contraceptive
CHC contains an estrogen and a progestogen.
What are the forms in which CHC can be delivered?
- Pill (COC)
- Transdermal patch (CTP)
- Vaginal ring (CVR)
What is the risk of contraceptive failure with perfect use of CHC?
<1%
What is the estimated percentage of women experiencing unplanned pregnancies with typical use of CHC in the first year?
9%
What factors can affect the effectiveness of CHC?
- Drug interactions
- Malabsorption (COC only)
- Weight (CTP less effective in women >90 kg)
What serious health risks are associated with current or recent use of CHC?
- Venous thromboembolism
- Arterial thromboembolism
- Breast cancer
- Cervical cancer
Which COC formulations are associated with a lower risk of venous thromboembolic events?
- Levonorgestrel (LNG)
- Norethisterone (NET)
- Norgestimate
What is the relationship between estrogen dose and arterial thrombotic events in CHC?
Higher EE doses may be associated with greater risk than lower EE doses.
What are some health benefits associated with ever-use of CHC?
- Reduced risk of endometrial cancer
- Reduced risk of ovarian cancer
- Reduced risk of colorectal cancer
- Predictable bleeding patterns
- Reduction in menstrual bleeding and pain
- Management of PCOS, endometriosis, and PMS
What side effects can be associated with CHC use?
- Mood changes
- Headache
- Unscheduled bleeding
Is there a CHC formulation that has the fewest unwanted nuisance effects?
No
What is the traditional CHC regimen?
21/7 regimen with a monthly withdrawal bleed
What potential problem can arise during the hormone-free interval (HFI) in the traditional CHC regimen?
Risk of escape ovulation
What are ‘tailored’ CHC regimens?
Regimens with fewer or no HFIs to avoid withdrawal bleeds and symptoms.