1 / 8

Diagnostic Techniques for Pre-Term Labor Ch 13

Diagnostic Techniques for Pre-Term Labor Ch 13. 2009-2010 Academic Year MSIII Ob/Gyn Clerkship Self-Directed Study. Diagnosis of PTL. Objectives - Understand the diagnostic techniques for PTL Definition Cervical Length FFN. Definition. Between 20 and 37 weeks EGA

Download Presentation

Diagnostic Techniques for Pre-Term Labor Ch 13

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Diagnostic Techniques for Pre-Term LaborCh 13 2009-2010 Academic Year MSIII Ob/Gyn Clerkship Self-Directed Study USUHS MSIII Ob/Gyn Clerkship Self Directed Studies

  2. Diagnosis of PTL • Objectives - Understand the diagnostic techniques for PTL • Definition • Cervical Length • FFN USUHS MSIII Ob/Gyn Clerkship Self Directed Studies

  3. Definition • Between 20 and 37 weeks EGA • Documented uterine contractions (4 per 20 minutes or 8 per 60 minutes) • Documented cervical change USUHS MSIII Ob/Gyn Clerkship Self Directed Studies

  4. Normal Cervical Length Bladder Cervix Intrauterine http://www.scielo.br/img/revistas/bjmbr/v37n5/4786i02peq.jpg USUHS MSIII Ob/Gyn Clerkship Self Directed Studies

  5. Cervical Length Normal Cx Length No Funneling • Measure length of cervix using trans-vaginal ultrasound • Greater than 2.5 to 3 cm is considered normal (references differ) Best PPV if use 3 cm as cutoff. www.Mdconsult.com USUHS MSIII Ob/Gyn Clerkship Self Directed Studies

  6. Shortened Cervix 9mm is not normal for CL • Less than 2 cm with high PPV for PTL • Can be affected by bladder (full vs. empty), want empty • Change vs. stability over time - if 2.5 cm but no change, may not be PTL http://www.studiolift.com/fetal/site/Short%20cervix.jpg USUHS MSIII Ob/Gyn Clerkship Self Directed Studies

  7. Funneling and PTL Funneling present • Funneling • Present when patient valsalva’s or with fundal pressure by sonographer • Residual length is important https://vss121.viux.com/iame_com/learning/cervlength/figure7.jpg USUHS MSIII Ob/Gyn Clerkship Self Directed Studies

  8. Fetal Fibronectin (FFN) Posterior Fornix FFN is presesnt when cervix starts to change. No gel on speculum • Very good NPV (Neg test result consistent with no delivery within 7 days) PPV not as good (can be false positive) • Blood can give false positive. If speculum, cervical exam, intercourse (anything in vagina) in past 24 hours, can give false results, so cannot be done in those circumstances. http://www.laboratoryalliance.com USUHS MSIII Ob/Gyn Clerkship Self Directed Studies

More Related