Rh Negative Pregnancy Flashcards
(19 cards)
Rh antigens formation in foetus starts from
38days of gestation
Dose of Anti D given
300mcg/1500 IU of anti D neutralises 30 mL of fetomaternal hemorrhage/ 15ml of feral RBC
Foe every extra 1ml of foetal blood 10mcg of anti D is added
Antepartum prophylaxis in Rh unsensitized women
300mcg/1500IU of anti D
Test done to check for sensitivity of RH -ve mother
Indirect Coombs test
Timing:1st ANC visit + repeated at 28weeks
Why early cord clamping is done in Rh unsensitized women
To prevent sensitisation during delivery
Anti D can be given upto how long after delivery
72hours after vaginal delivery
28days after C section
Critical anti D titre in RH sensitised women
1:16 or more
When is TOP done in RH sensitised women
37-38weeks
When would TOP done in RH unsensitized women
39-40weeks
Single indication of Cordocentesis
Feral anemia PSV in middle cerebral artery is >1.5MOM
Screening test to detect fetomaternal hemorrhage
Rosette test
Quatitative test of fetomaternal hemorrhage
Kleihauer betke test (should be done within 2 hours)
Dose of anti D <12weeks
ACOG 50mcg(this is followed in India)
RCOG 300mcg
M/c minor antigen causing sensitisation
Kell antigen
M/c non D alloimmunization
Anti E
Most severe non D alloimmunization
Anti c
Causes of mirror syndrome/ballantyne syndrome
Anti D isoimmunization
TTTT syndrome
Cystic hygrometer
Placental choriangioma
What is buddha sign
Subcutaneous edema in scalp seen in USG in hydrops fetalis
Diagnosis of hydrops fetalis
USG based
1)pleural effusion
2) ascitis
3)pericardial effusion
4)subcutaneous edema
