Risk factors for neonatal brachial plexus palsy attributed to anatomy, physiology, and evolution.
Clin Anat
; 34(6): 884-898, 2021 Sep.
Article
em En
| MEDLINE
| ID: mdl-33904192
ABSTRACT
The inherent variable anatomy of the neonate and the uniquely-shaped maternal birth canal that is associated with the evolution of human bipedalism constitute risk factors for neonatal brachial plexus palsy (NBPP). For example, those neonates with a prefixed brachial plexus (BP) are at greater risk of trauma due to lateral neck traction during delivery than those with a normal or postfixed BP. Compared to adults, neonates also have extremely large and heavy heads (high head body ratio) set upon necks with muscles and ligaments that are weak and poorly developed. Accordingly, insufficient cranial stability can place large torques on the cervical spinal nerves. In addition, the pelvic changes necessary for habitual bipedal posture resulted in a uniquely-shaped, obstruction-filled, sinusoidal birth canal, requiring the human fetus to complete a complicated series of rotations to successfully traverse it. Furthermore, although there are many risk factors that are known to contribute to NBPP, the specific anatomy and physiology of the neonate, except for macrosomia, is not considered to be one of them. In fact, currently, the amount of lateral traction applied to the neck during delivery is the overwhelming legal factor that is used to evaluate whether a birth attendant is liable in cases of permanent NBPP. Here, we suggest that the specific anatomy and physiology of the neonate and mother, which are clearly not within the control of the birth attendant, should also be considered when assessing liability in cases of NBPP.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Parto Obstétrico
/
Parto
/
Variação Anatômica
/
Paralisia do Plexo Braquial Neonatal
/
Cabeça
/
Pescoço
Tipo de estudo:
Etiology_studies
/
Risk_factors_studies
Limite:
Humans
/
Newborn
Idioma:
En
Revista:
Clin Anat
Assunto da revista:
ANATOMIA
Ano de publicação:
2021
Tipo de documento:
Article
País de afiliação:
Estados Unidos