1. Fetal Monitoring of Twins
Deborah J. Eganhouse, RN, MA 
Journal of Obstetric, Gynecologic & Neonatal Nursing 
Volume 21, Issue 1, Pages (January 1992)
DOI: /j tb01717.x
Copyright © 1992 AWHONN, the Association of Women's Health, Obstetric and Neonatal Nurses Terms and Conditions

2. Figure 1
Synchronous fetal heart rate tracings have similar frequency and timing of accelerations, baseline oscillations, and periodic changes.
Journal of Obstetric, Gynecologic & Neonatal Nursing  , 17-27DOI: ( /j tb01717.x)
Copyright © 1992 AWHONN, the Association of Women's Health, Obstetric and Neonatal Nurses Terms and Conditions

3. Figure 2
Asynchronous tracings have differences in reactivity and long-term variability.
Journal of Obstetric, Gynecologic & Neonatal Nursing  , 17-27DOI: ( /j tb01717.x)
Copyright © 1992 AWHONN, the Association of Women's Health, Obstetric and Neonatal Nurses Terms and Conditions

4. Figure 3
Nonstress testing with two different monitors decreases electronic signal interference. For maternal comfort, only two belts are used to position all four transducers.
Journal of Obstetric, Gynecologic & Neonatal Nursing  , 17-27DOI: ( /j tb01717.x)
Copyright © 1992 AWHONN, the Association of Women's Health, Obstetric and Neonatal Nurses Terms and Conditions

5. Figure 4
Question marks at the top of the tracing (note arrows) indicate that similar signals are being detected during dual monitoring.
Journal of Obstetric, Gynecologic & Neonatal Nursing  , 17-27DOI: ( /j tb01717.x)
Copyright © 1992 AWHONN, the Association of Women's Health, Obstetric and Neonatal Nurses Terms and Conditions

6. Figure 5
During intrapartal monitoring, a single dark fetal heart rate tracing should alert the nurse to readjust the cardiotransducer.
Journal of Obstetric, Gynecologic & Neonatal Nursing  , 17-27DOI: ( /j tb01717.x)
Copyright © 1992 AWHONN, the Association of Women's Health, Obstetric and Neonatal Nurses Terms and Conditions

7. Figure 6
After adjustment of the cardiotransducer (see Figure 5), two distinct fetal heart rate tracings are recorded.
Journal of Obstetric, Gynecologic & Neonatal Nursing  , 17-27DOI: ( /j tb01717.x)
Copyright © 1992 AWHONN, the Association of Women's Health, Obstetric and Neonatal Nurses Terms and Conditions

8. Figure 7
The first twin is accidentally monitored by spiral electrode and cardiotransducer. Monitor paper with separate scales shows identical fetal heart rate tracings.
Journal of Obstetric, Gynecologic & Neonatal Nursing  , 17-27DOI: ( /j tb01717.x)
Copyright © 1992 AWHONN, the Association of Women's Health, Obstetric and Neonatal Nurses Terms and Conditions

9. Figure 8
Readjustment of the ultrasound transducer (see Figure 7) results in two distinct tracings.
Journal of Obstetric, Gynecologic & Neonatal Nursing  , 17-27DOI: ( /j tb01717.x)
Copyright © 1992 AWHONN, the Association of Women's Health, Obstetric and Neonatal Nurses Terms and Conditions

10. Figure 9
Nursing care plans should include pertinent information to assist nurses in monitoring twins. FHR: fetal heart rate; U/S: ultrasound.
Journal of Obstetric, Gynecologic & Neonatal Nursing  , 17-27DOI: ( /j tb01717.x)
Copyright © 1992 AWHONN, the Association of Women's Health, Obstetric and Neonatal Nurses Terms and Conditions