Module 4 - VTE

Question 1

When are TEDS CI?

Answer 1

Peripheral artery disease / Grafting / Neuropathy.
Local skin conditions.
Severe leg oedema.
Major limb deformities.

Question 2

When should COCP be stopped pre-op?

Answer 2

4 weeks.

Question 3

What proportion of VTEs are hospital aquired?

Answer 3

50 - 60%

Question 4

Define hospital acquired VTE

Answer 4

Acquired in hospital or within 90 days of admission.

Question 5

From what week of gestation is thrombin production increased?

Answer 5

From 5/40

Question 6

By how much does the risk of VTE increase for a patient who undergoes IVF and then develops OHSS?

Answer 6

100 x increased.

Question 7

What is the VTE risk in:
1. Background risk
2. CHC
3. Pregnancy
4. Post partum

Answer 7

1. Background risk
   1-5 / 10,000
2. CHC
   3-5 / 10,000
3. Pregnancy
   5-20 / 10,000
4. Post partum
   40-65 / 10,000.

Question 8

What is the increased VTE risk with transdermal HRT?

Answer 8

NO increased risk.

Question 9

What is the lowest oestrogen risk in HRT?

(what is the highest?)

Answer 9

Lowest = Estradiol - Dydrogesterone.
(medium = estradiol)
Highest = conjugated-equine (with medroxyprogesterone).

Question 10

What is the risk of VTE with laparotomy vs laparoscopy?

Answer 10

Laparotomy = 0.2 - 0.6%
Vaginal / Laparoscopy = 0.1 - 0.2%.

Question 11

By what percentage does intermittent pneumatic compression reduce VTE risk?

Answer 11

60%.