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Shoulder Dystocia Case Discussion: Maneuvers, Injury, and Safety [ Case Discussion ](https://mdster.com/blog?category=case-discussion) Shoulder Dystocia Case Discussion: Maneuvers, Injury, and Safety ================================================================== From a four-minute delivery emergency to a defensible, systems-focused review [ MDster Editorial Team ](https://mdster.com/about) · Sep 16, 2026 · 6 min read · 43 [ Reviewed by Dr. Ali Ragab, MBBCH, MSc, MCAI ](https://mdster.com/medical-reviewers/dr-ali-ragab) [Editorial Policy](https://mdster.com/editorial-policy) | [Corrections Policy](https://mdster.com/corrections) [ Board Review ](https://mdster.com/blog?tag=board-review) [ Patient Safety ](https://mdster.com/blog?tag=patient-safety) [ Obstetrics & Gynecology ](https://mdster.com/blog?tag=obstetrics-gynecology) [ Case Discussion ](https://mdster.com/blog?tag=case-discussion) [ Obstetric Emergencies ](https://mdster.com/blog?tag=obstetric-emergencies) [ Shoulder Dystocia ](https://mdster.com/blog?tag=shoulder-dystocia) ![Shoulder Dystocia Case Discussion: Maneuvers, Injury, and Safety](https://mdster.com/storage/blog/images/shoulder-dystocia-case-discussion-maneuvers-injury-and-safety.jpg) Share this article Share this post On this page 1. [ Recognize Shoulder Dystocia Without Waiting ](#recognize-shoulder-dystocia-without-waiting) 2. [ Release the Impaction, Not With Greater Force ](#release-the-impaction-not-with-greater-force) 3. [ Initial response and pelvic mechanics ](#initial-response-and-pelvic-mechanics) 4. [ Internal maneuvers and rescue options ](#internal-maneuvers-and-rescue-options) 5. [ After Delivery: Investigate the Limp Arm ](#after-delivery-investigate-the-limp-arm) 6. [ Separate nerve injury from painful pseudoparalysis ](#separate-nerve-injury-from-painful-pseudoparalysis) 7. [ Could Antenatal Management Have Changed This? ](#could-antenatal-management-have-changed-this) 8. [ Macrosomia counseling as of September 2026 ](#macrosomia-counseling-as-of-september-2026) 9. [ Turn the Review Into Safer Care ](#turn-the-review-into-safer-care) 10. [ Examine communication without inventing a root cause ](#examine-communication-without-inventing-a-root-cause) 11. [ Disclosure and shared decisions ](#disclosure-and-shared-decisions) 12. [ Key Points for Board Exams ](#key-points-for-board-exams) 13. [ Frequently Asked Questions ](#blog-faqs) 14. [ References ](#references-heading) On this page 1. [ Recognize Shoulder Dystocia Without Waiting ](#recognize-shoulder-dystocia-without-waiting) 2. [ Release the Impaction, Not With Greater Force ](#release-the-impaction-not-with-greater-force) 3. [ Initial response and pelvic mechanics ](#initial-response-and-pelvic-mechanics) 4. [ Internal maneuvers and rescue options ](#internal-maneuvers-and-rescue-options) 5. [ After Delivery: Investigate the Limp Arm ](#after-delivery-investigate-the-limp-arm) 6. [ Separate nerve injury from painful pseudoparalysis ](#separate-nerve-injury-from-painful-pseudoparalysis) 7. [ Could Antenatal Management Have Changed This? ](#could-antenatal-management-have-changed-this) 8. [ Macrosomia counseling as of September 2026 ](#macrosomia-counseling-as-of-september-2026) 9. [ Turn the Review Into Safer Care ](#turn-the-review-into-safer-care) 10. [ Examine communication without inventing a root cause ](#examine-communication-without-inventing-a-root-cause) 11. [ Disclosure and shared decisions ](#disclosure-and-shared-decisions) 12. [ Key Points for Board Exams ](#key-points-for-board-exams) 13. [ Frequently Asked Questions ](#blog-faqs) 14. [ References ](#references-heading) The head delivers, retracts against the perineum, and the shoulders remain impacted. In this case, a 34-year-old G3P2 at 39 weeks, with BMI 36 kg/m² and a previous 3800-g vaginal birth, requires multiple maneuvers before delivery of a 4500-g infant four minutes later. Depressed Apgar scores and a limp right arm shift attention immediately to neonatal assessment and maternal surveillance. Recognize Shoulder Dystocia Without Waiting ------------------------------------------- Shoulder dystocia is diagnosed when the shoulders require additional maneuvers after routine axial traction fails. A head-to-body interval exceeding 60 seconds is a proposed objective criterion—not a prerequisite for intervention. Usually, the anterior shoulder is trapped behind the symphysis; posterior impaction against the sacral promontory is less common. [\[1\]](#cite-1 "Reference [1]") The important maternal complications are postpartum hemorrhage and obstetric anal sphincter injury. These risks justify active postpartum assessment even when delivery appears mechanically successful. [\[1\]](#cite-1 "Reference [1]") > **Clinical Pearl:** The 60-second criterion describes delay; it does not authorize waiting when routine delivery has already failed. [\[1\]](#cite-1 "Reference [1]") Release the Impaction, Not With Greater Force --------------------------------------------- ### Initial response and pelvic mechanics Announce the emergency, summon obstetric, anesthesia, and neonatal assistance, and allocate a recorder. Use explicit maneuver callouts and elapsed-time updates so everyone follows the same plan. [\[2\]](#cite-2 "Reference [2]") 1. Discourage pushing temporarily and stop oxytocin if running. 2. Perform McRoberts positioning with suprapubic pressure. 3. Avoid fundal pressure and excessive or lateral head traction. 4. Escalate promptly when external maneuvers fail. [\[3\]](#cite-3 "Reference [3]") McRoberts straightens the lumbosacral angle and rotates the symphysis cephalad, reducing pelvic inclination. Suprapubic pressure adducts and rotates the anterior shoulder toward an oblique diameter. [\[3\]](#cite-3 "Reference [3]") ### Internal maneuvers and rescue options Use internal rotation or posterior-arm delivery according to access and operator expertise; neither has an established universal priority. Posterior-arm delivery reduces shoulder impaction. Episiotomy only improves access—it does not relieve bony obstruction. [\[3\]](#cite-3 "Reference [3]") Posterior axilla sling traction uses a loop beneath the posterior axilla to assist traction or rotation. This is a specialist rescue technique, distinct from delivering the posterior arm; evidence is limited, and severe soft-tissue injury has been reported. Refractory cases require senior-led consideration of abdominal rescue or Zavanelli followed by cesarean delivery. [\[3\]](#cite-3 "Reference [3]") After Delivery: Investigate the Limp Arm ---------------------------------------- ### Separate nerve injury from painful pseudoparalysis A limp arm is not automatically Erb palsy. Document the distribution of weakness before assigning a lesion level, and examine for associated skeletal injury. [\[4\]](#cite-4 "Reference [4]") - Consider brachial plexus injury, clavicular fracture, and humeral fracture. - Assess shoulder, elbow, wrist, and finger movement, reflexes, and passive range of motion. - Obtain radiographs when fracture is suspected. - Assess respiratory symmetry and Horner syndrome for potentially extensive injury. [\[4\]](#cite-4 "Reference [4]") Continue neonatal resuscitation and obtain cord gases without allowing sampling to delay care. Apparently normal gases should not override an abnormal neonatal examination. [\[3\]](#cite-3 "Reference [3]") Arrange serial examinations and specialist follow-up rather than promising complete recovery. Incomplete upper-limb recovery at one month requires immediate referral to a multidisciplinary brachial plexus team; severe findings justify earlier referral. [\[4\]](#cite-4 "Reference [4]") Could Antenatal Management Have Changed This? --------------------------------------------- ### Macrosomia counseling as of September 2026 The statement “suspected macrosomia is never an indication for induction” is too broad. ACOG Practice Bulletin 216 advises against induction **before 39 weeks solely for suspected macrosomia**, because the benefit–harm balance is insufficiently established. Estimated fetal weight remains imprecise. [\[5\]](#cite-5 "Reference [5]") ACOG supports considering scheduled cesarean delivery at estimated weights of at least 5000 g without diabetes or 4500 g with diabetes. These are counseling thresholds, not proof that this infant’s eventual 4500-g birthweight mandated cesarean delivery beforehand. [\[5\]](#cite-5 "Reference [5]") NICE recommends discussing expectant management, induction, and cesarean birth for suspected macrosomia without diabetes. Counseling includes reduced shoulder dystocia with induction, uncertainty about overall benefits, and a possible increase in severe perineal tears. Guideline jurisdiction and patient preferences therefore matter. [\[6\]](#cite-6 "Reference [6]") Turn the Review Into Safer Care ------------------------------- ### Examine communication without inventing a root cause The supplied SOE provides neither answer options nor a named safety dataset. Consequently, its claim about the “most frequent” root cause cannot be verified from the question alone. A useful review reconstructs what happened rather than assigning blame. AHRQ supports multidisciplinary debriefing, standardized documentation, and simulation addressing recognition, assistance, communication, and coordinated management. Training can reduce adverse outcomes, but attendance alone is not a sufficient quality measure. [\[2\]](#cite-2 "Reference [2]") For this department, a practical audit would examine: - Recognition, help-call, maneuver, and delivery timestamps. - Role allocation and closed-loop communication. - Whether repeated unsuccessful actions delayed escalation. - Completeness of maternal and neonatal follow-up. These are proposed review questions, not conclusions about this team’s performance. ### Disclosure and shared decisions Explain the known facts, consequences, immediate care, and investigation plan promptly. Offer a sincere apology, acknowledge uncertainty, and arrange follow-up; do not speculate about causation or promise recovery. Disclosure and compassionate apology are complementary responsibilities, not substitutes for investigation. [\[7\]](#cite-7 "Reference [7]") For subsequent counseling, the SOE’s PREPARED framework prompts discussion of Plan, Reason, Expectations, Preferences, Alternatives, Risks, Expenses, and Decision. It can organize deliberation after stabilization, rather than delaying emergency maneuvers. Key Points for Board Exams -------------------------- - Diagnose clinically; do not wait for 60 seconds. [\[1\]](#cite-1 "Reference [1]") - Anticipate hemorrhage and severe perineal injury. [\[1\]](#cite-1 "Reference [1]") - Investigate fracture as well as brachial plexus injury. [\[4\]](#cite-4 "Reference [4]") - Distinguish pre-39-week induction guidance from individualized term counseling. [\[5\]](#cite-5 "Reference [5]") The case discussion should end with two questions: Was care coordinated and technically appropriate, and what measurable system change will make the next response more reliable? Frequently Asked Questions ---------------------------- ### Does a prior uncomplicated vaginal birth exclude shoulder dystocia? No. Previous vaginal delivery does not exclude shoulder impaction in a subsequent birth. [\[3\]](#cite-3 "Reference [3]") ### Does neonatal arm weakness prove excessive traction occurred? No. Brachial plexus injury has multiple possible mechanisms; the finding alone cannot establish causation. [\[4\]](#cite-4 "Reference [4]") ### Should disclosure wait until the investigation is complete? No. Explain known facts and immediate care promptly, then provide updates as the investigation clarifies events. [\[7\]](#cite-7 "Reference [7]") References (7) ------------------ 1. 1. [ www.rcog.org.uk/guidance/browse-all-guidance/green-top-guidelines/shoulder-dystocia-green-top-guideline-no-42 ](https://www.rcog.org.uk/guidance/browse-all-guidance/green-top-guidelines/shoulder-dystocia-green-top-guideline-no-42/) [↩](#cite-ref-1-1 "Back to text") 2. 2. [ AHRQ. Labor and Delivery Unit Safety: Shoulder Dystocia. ](https://www.ahrq.gov/patient-safety/settings/labor-delivery/perinatal-care/modules/strategies/labor-delivery-unit/tool-shoulder-dystocia.html) [↩](#cite-ref-2-1 "Back to text") 3. 3. [ RCOG. Shoulder Dystocia, Green-top Guideline No. 42, third edition. 2026. ](https://obgyn.onlinelibrary.wiley.com/doi/10.1111/1471-0528.70258) [↩](#cite-ref-3-1 "Back to text") 4. 4. [ Canadian Paediatric Society. Neonatal brachial plexus palsy: Evaluation and management. 2021. ](https://cps.ca/en/documents/position/neonatal-brachial-plexus-palsy) [↩](#cite-ref-4-1 "Back to text") 5. 5. [ ACOG. Macrosomia: Practice Bulletin 216. 2020. Recommendations reproduced by FECOLSOG. ](https://fecolsog.org/acog-practice-bulletin-de-febrero-de-2020/) [↩](#cite-ref-5-1 "Back to text") 6. 6. [ NICE. Inducing labour, NG207: Recommendations. ](https://www.nice.org.uk/guidance/ng207/chapter/recommendations) [↩](#cite-ref-6-1 "Back to text") 7. 7. [ AHRQ. CANDOR Disclosure Checklist. ](https://www.ahrq.gov/patient-safety/settings/hospital/candor/modules/checklist5.html) [↩](#cite-ref-7-1 "Back to text") Next step Build confidence in OB/GYN with focused practice -------------------------------------------------- - Labor & delivery + postpartum essentials - Gynecology, screening, and common procedures - Review weak topics and improve faster [ Start practicing ](https://mdster.com/user/dashboard) [ Explore Obstetrics & Gynecology ](https://mdster.com/speciality/obstetrics-gynecology) [ View pricing ](https://mdster.com/pricing) [ Explore features ](https://mdster.com/features) No credit card required. Full access to all features\*. No commitment. Cancel anytime. \*AI SOE Examiner is limited to 10 cases monthly for Advanced & Bundle subscribers. 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