"4. For the purposes of the delivery of a child, the female pelvis has an inlet which is usually oval-shaped, being wider in the transverse diameter (side-to-side) than the anterio-posterior (front-to-back) diameter. The pelvic outlet is also oval, but wider in the anterio-posterior diameter. The normal mechanism of labour is that the foetal head will enter the pelvis through the inlet in a transverse or lateral position (i.e. with the baby's face facing to one side or the other), with the shoulders in the anterio-posterior diameter. The shoulders remain more or less in that diameter, whilst the head, upon reaching the pelvic floor, rotates to the same diameter to facilitate its delivery of the head, reverting to the lateral once it is delivered. "5. Usually, the head having been delivered, during the course of the next uterine contraction, the shoulders and body are delivered. Whilst the accoucheur guides the baby's body out, he or she does not impose anything more than modest traction: the baby is spontaneously pushed out by the force of the contraction. "6. However, where the shoulder girdle of the baby is wide, following delivery of the head, the leading or anterior shoulder can become impacted against the symphysis pubis, preventing the shoulders from spontaneously descending as they should. To enable delivery of the baby, this obstetric emergency (known as "shoulder dystocia") requires manoeuvres other than normal downward traction and episiotomy. The condition is difficult to predict, and its severity cannot be assessed until after the head has been delivered. By its nature, the accoucheur midwife is usually the first clinician to identify the problem. It is uncommon but, understandably, the rate of occurrence rises sharply with foetal size, being perhaps over 10% for babies over 4.5kg. It requires speedy and decisive action when encountered, to prevent foetal hypoxia which may lead to brain damage or death. "7. Shoulder dystocia is diagnosed by (i) the retraction of the delivered baby's head into the pelvis, known as "turtling", which (said Mrs Fraser) was a sign of more than moderate shoulder dystocia; or (ii) the failure of the delivery of the baby's shoulders and body during the first uterine contraction after the delivery of his or her head. It was common ground between the experts (and agreed by Midwife Haughton) that, if there is any sign of turtling, then any traction of the head would be inappropriate and dangerous. During the first uterine contraction after delivery of the head, it is appropriate for the accoucheur to apply some modest traction to the baby's head unless and until it is apparent that resistance is being encountered. As soon as resistance is apparent, then, again, it is common ground (and, again, agreed by Midwife Haughton) that any further traction to the head would be inappropriate and dangerous. "8. Once shoulder dystocia is diagnosed or suspected, the first step for the midwife is to summon assistance, because the recognised steps to overcome the problem require more than one clinician. First, the mother's hips are hyperflexed onto or towards her abdomen (the McRobert's manoeuvre): this change of position effectively straightens out the exit passage for the baby. Second, supra-pubic pressure may be applied (the Rubin manoeuvre): this may assist by mechanically disimpacting and hence dislodging the shoulder. One or both of these steps usually result in prompt delivery of the baby. If they do not, then more intrusive manoeuvres are available. "9. The brachial plexus is a group of nerves emerging from neck region of the spine, which supply the muscles of the shoulder and forearm. When stretched, these nerves may become damaged or even torn, leading to partial or total paralysis of the arm (a condition known as "
“History of contractions since 14.00 h. VE [vaginal examination] Cx[cervix] soft, partially effaced [cervical] os 4cms dilated, loosely applied to PP [presenting part] ↑[above] level of the Ischial Spine Abdominal examination Fundus at term, large baby Single fetus. Long[itudinal] lie, cephalic [head down] Presentation 3/5ths palpable, “ROA” [right occipito anterior] FHH Reg [fetal heart heard regular]”
“Not pushing effectively. Patient complaining++ but will not accept advice to push properly.”
“Dr Ali contacted re lack of progress2nd stage. Says he will visit in 15 mins.”
“Patient complaining++ and refusing to push any more.”
“Forceps delivery of live male infant. Shoulder dystocia”
“Barnes Forceps delivery For delay in 2nd stage Cervix fully dilated “OP”
“Called to delivery - Forceps for failure to progress - Meconium stained liquor - Shoulder dystocia, difficulty delivering of head, body born at 4 mins - V large baby - Apgar A method of assessing a newborn baby’s wellbeing, by reference to five parameters each of which is capable of scoring up to two points. A score of 5 at 1 minute suggests that the Claimant was not in bad condition at birth. 5 at 1 min - Suction or oro/nasopharynx +larynx - Given O² via IPPV with good effect - Required further suction→meconium stained liquid seen coming from below cords - Apgar 9 at 5 minutes - Chest – good A[ir] E[ntry] few moist sounds, Apgar 10 at 7 mins - Moaning →to SCBU [Special Care Baby Unit] ............. Good movements in legs and L arm No movement in R arm, hypotonic.”
“A relatively brief delay in delivery of the shoulders may be associated with a fatal outcome”
“Shoulder dystocia is defined as a delivery that requires additional obstetric manoeuvres to release the shoulders after gentle downwards traction has failed. Shoulder dystociaoccurs when either the anterior or, less commonly, the posterior fetal shoulder impacts on the maternal symphysis or sacral promontory.”
“Not all injuries are due to excess traction by the accoucheur and there is now a significant body of evidence that maternal propulsive forces may contribute to some of these injuries. Moreover, a substantial minority of brachial plexus injuries are not associated with clinically evidence shoulder dystocia. In one series, 4% of injuries occurred after a caesarean section. Specifically, where there is Erb’s palsy, it is important to determine whether the affected shoulder was anterior or posterior at the time of delivery, because damage to the plexus of the posterior shoulder is considered not due to action by the accoucheur.”
“14. We all agree that if the right shoulder was posterior then the injury was either due to the propulsive force(s) of labour which would be non negligent [and/or] due to non negligent traction during the forceps delivery with the fetal posterior shoulder obstructed over the sacral promontory.”
"7.7 … I am not satisfied on the evidence before me that any conclusion can be drawn as to whether the majority of [obstetric brachial plexus injuries] are probably caused by traction, probably caused by propulsion or probably caused by a combination of both."
"Causation of obstetric brachial plexus injury is multifactorial; evidence suggests that while some cases are traction mediated, others may not be. There is growing acceptance in both the medical literature and case law that the propulsive forces of uterine contraction may play a part. The assumption that the presence of an injury is evidence that traction must have been applied is no longer valid. Injury may occur regardless of best efforts of the accoucheur. Diagnostic traction is acceptable and claimants now need to demonstrate factual evidence of the use of excessive force or other inappropriate management to succeed in arguing negligent management."