IUS

Question 1

What is the mode of action of IUS?

Answer 1

Slow release of levonorgestrel

local effects: changes to cervical mucus and uterotubal fluid, which impairs sperm migration.

THUS - prevents fertilisation

Also prevents IMPLANTATION

Question 2

What is the failure rate of the IUS?

Answer 2

0.2%

Question 3

What are causes of failure of IUS?

Answer 3

Incorrect insertion of device
Expulsion of device
Time runs out

Question 4

What are the side effects of IUS?

Answer 4

Pelvic infection
Menstrual disturbance (amenorrhea)
Irregular bleeding up to 6months
Perforation

Question 5

What are the risks f the IUS

Answer 5

ectopic pregnancy
PID
Caution if risk of STI
Displacement

CI if cannot take CHC (eg migraine with aura)

Question 6

What are the benefits of IUS?

Answer 6

amenorrhea
safe in breastfeeding
no enzyme induction/drug interaction

Question 7

How long can IUS be in place

Answer 7

Mirena - 5 years

Jaydess - 3 years