Summer Peace was taken to Russells Hall Hospital on September 8, 2017, after she became “limp” and struggled to breathe, jurors were told.
Birmingham Crown Court was told she arrived at the hospital at 4.28pm, where she was taken into the resuscitation department.
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Dr Nicholas Stockdale, a consultant in emergency medicine at the hospital, took over her care.
Dr Stockdale, who led the team of professionals, said it was “clear” she was still in a “critical condition” despite ongoing resuscitation efforts.
Chest compressions were carried out as her heart had stopped beating, but showed electrical activity on an electrocardiogram monitor, a judge heard.
Dr Stockdale, giving evidence, said it meant oxygen was not being pumped around her body, something which they tried to fix through the external compressions.
Summer remained in a “very serious” condition, despite a pulse being returned at 4.50pm, the court heard.
Dr Stockdale said he had spoken with Summer’s father, Philip Peace, for more information about the baby’s history, with the father highlighting feeding difficulties an hour before she collapsed.
Peace, 42, of Himley Road in Dudley, denies murder and manslaughter.
The trial continues.