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Updated: Jul 15, 2026

Development of a Neonatal Rat Model for Brachial Plexus Birth Injury
Published on: March 27, 2026
[Risk factors for birth injuries]
Heladia García1, Jorge Rubio-Espíritu, Maria Teresa Islas-Rodríguez
1Unidad de Cuidados Intensivos Neonatales, Hospital de Pediatría CMN SXXI, IMSS. hely1802@yahoo.com.mx
Objective:
To identify risk factors associated with birth trauma.
Setting:
Servicio de Neonatología, Hospital General "Dr. Manuel Gea González", Secretaría de Salud.
Design:
Case-control, prolective study.
Patients:
There were 129 cases and 134 controls.
Measures:
We recorded the following variables: a) maternal and delivery: age, weight, height, prenatal care, pre-existing disease or gestational disease, mode of delivery, anesthetic management during labor, use of external maneuvers or forceps; b) newborn: birth weight, gestational age, academic degree of attendant physician at delivery, and type of birth injury.
Results:
The independent risk factors associated to birth injury were: for ecchymoses; general anesthesia (OR 13.7, 95% CI = 3 - 62.6), breech presentation (OR 6.4, 95% IC 95% = 1.4 - 27.9) and gestational age < or = 32 weeks (OR 6.4, 95% CI = 1.3 - 31.1); for lacerations, vaginal dystocic delivery or cesarean section (OR 19, 95% CI = 4.4 - 81.1) and use of external maneuvers (OR 5.6, 95% CI = 1.5 - 21.6); for cephalhematoma maternal height < or = 1.54 m (OR 7.4, 95% CI = 2.3 - 23.7) and external maneuvers (OR 7.2, 95% CI = 2.3 - 23.7); for caput succedaneum, external maneuvers (OR 3.4, 95% CI = 1.5-7.7) and maternal age < or = 19 or > or = 36 years (OR 3.0, 95% CI = 1.4 - 6.4).
Conclusions:
Risk factors associated with birth injuries identified in this study involved maternal conditions, neonatal conditions and mechanism of delivery.
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