unstable lie
TRANSCRIPT
UNSTABLE LIE
Dilki PunchihewaBatch – 03SAITM
Unstable lie occurs when the fetal lie repeatedly changes beyond 36 weeks of gestation.
Causes Maternal
• Multiparity • Uterine
abnormalities (fibroids)
• Placenta praevia • Pelvic contractures • Wrong dates
Fetal• Polyhydramnioas• Fetal abnormalities
(anencephaly, IUD) • Multiple
pregnancies
Assessment History• a) Make sure that the date is correct.• b) Find any risk factor associated with unstable lie.• c) Elicit any problem during pregnancy
Examination • Establish the fetal lie by palpation • Assess the laxity of the muscles • Does the fetal parts move easily? • Amniotic fluid volume?
Investigations • USS- look for fetal lie, pelvic pathologies, uterine pathologies, placental site.
Management • Admit patient to antenatal ward from 37 weeks.
Expectant• A) Daily observation for fetal lie• B) Discharge if longitudinal lie for 3 days• C) Review patient in a week time• D) Wait for spontaneous labour• Usually 80% of patients without underlying cause will go to the longitudinal lie with time.
Active management• A) Caeserean section at 39 weeks. If underlying cause found then c-section at 38 weeks • B) ECV • C) Stabilizing induction of labour
Why LSCS?
• Labour with with non-longitudinal lie will result in obstructed labour and potential uterine rupture
• Risk of cord prolapse and hand prolapse
Reference • Clinical Guideline South Australian Perinatal Practice Guidelines – unstable
lie of the fetus
• WOMEN AND NEWBORN HEALTH SERVICE King Edward Memorial Hospital
• Oxford handbook pg(88-89)