Radiology Notes

My notes during radiology residency, fellowship, and beyond…

Archive for the ‘OB’ Category

Cord Insertion Types

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Required element in a complete >14wk OB ultrasound report.

Cord Insertion types: central, eccentric, marginal, and velamentous

Nice youtube video for ultrasound images.

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Written by lmwong

May 16, 2013 at 11:05 am

Posted in OB, ultrasound

Ultrasound Landmarks for Early Pregnancy Failure

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Source

Written by lmwong

March 6, 2011 at 7:45 am

Posted in OB, ultrasound

Beta-HCG levels and Gestational Age

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Discrim. Zone = 1500

3 weeks LMP: 5 – 50 mIU/ml
4 weeks LMP: 5 – 426 mIU/ml
5 weeks LMP: 18 – 7,340 mIU/ml
6 weeks LMP: 1,080 – 56,500 mIU/ml
7 – 8 weeks LMP: 7, 650 – 229,000 mIU/ml
9 – 12 weeks LMP: 25,700 – 288,000 mIU/ml
13 – 16 weeks LMP: 13,300 – 254,000 mIU/ml
17 – 24 weeks LMP: 4,060 – 165,400 mIU/ml
25 – 40 weeks LMP: 3,640 – 117,000 mIU/ml
Non-pregnant females: <5.0 mIU/ml
Postmenopausal females: <9.5 mIU/ml

 

Written by lmwong

December 11, 2010 at 5:04 pm

Posted in OB, ultrasound

Uterine Shapes

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Written by lmwong

February 2, 2010 at 5:57 pm

Posted in differential, GU, OB, uterus

Twin Types

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Written by lmwong

January 21, 2010 at 8:05 pm

Posted in differential, OB

Uterine Filling Defect Differential

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  • bubble
  • bloodclot
  • mucoid material
  • fold
  • synechiae; uterine adhesion
  • submucosal fibroid
  • septate uterus
  • uterine carcinoma
  • retained conceptus
  • molar pregnancy
  • pregnancy related
  • IUD

Written by lmwong

January 16, 2010 at 9:00 am

Cervical Incompetence

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  • ultrasound diagnosis: funnelling of proximal cervix
  • reduced cervical length of less than 30 mm
  • increased risk of preterm delivery
  • place patient in Trendelenburg position and call OB STAT.

Written by lmwong

May 24, 2008 at 7:46 pm

Posted in OB, ultrasound