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Updated: Jul 19, 2026

Anterior Cervical Discectomy and Fusion in the Ovine Model

Anterior Cervical Discectomy and Fusion in the Ovine Model

Published on: October 5, 2009

Cervical neck dislocation associated with the Zavanelli maneuver.

Michael G Ross¹, Marie H Beall

¹Department of Obstetrics and Gynecology, Harbor-UCLA Medical Center, Torrance, CA 90502, USA. mikeross@ucla.edu

Obstetrics and Gynecology

|October 5, 2006

Summary

The Zavanelli maneuver for shoulder dystocia can lead to severe fetal neck trauma, even in successful deliveries. This case highlights the risks of fetal head replacement, urging caution in its application.

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Last Updated: Jul 19, 2026

Anterior Cervical Discectomy and Fusion in the Ovine Model

Anterior Cervical Discectomy and Fusion in the Ovine Model

Published on: October 5, 2009

Area of Science:

Obstetrics and Gynecology
Perinatal Medicine
Fetal Surgery

Background:

Shoulder dystocia management often involves difficult delivery attempts.
The Zavanelli maneuver, involving fetal head replacement, is an option for intractable shoulder dystocia.
Previous reports on the Zavanelli maneuver have suggested optimism regarding its efficacy.

Observation:

A gravida 3 para 2 with gestational diabetes presented with shoulder dystocia after forceps delivery.
Standard maneuvers failed to resolve the shoulder dystocia.
A cesarean delivery was performed, resulting in the disimpaction of shoulders and abdominal delivery.

Findings:

The delivered infant, weighing 4,680g, was stillborn.
Radiologic and autopsy findings revealed cervical C5-C6 dislocation.
This indicates severe fetal neck trauma associated with the Zavanelli maneuver.

Implications:

Physicians must be aware of the potential for severe fetal cervical trauma with the Zavanelli maneuver.
Despite reported success rates, the risks of adverse fetal outcomes must be considered.
This case underscores the need for careful consideration and risk-benefit analysis before employing the Zavanelli maneuver.