12:25pm
The judge says Mr Myers "repeatedly expressed his opinions" on the merits of the expert evidence, questioning and challenging them. He says that is his right, but it is up to the jury to determine the reliability of the expert evidence.
The judge refers to Prof Owen Arthurs' evidence, who "considered each case on its own merits".
Prof Arthurs was provided with radiograph images of Child A. He noted the umbilical catheter was "slightly in the wrong place", and there was "a line of gas in front of the spine" on one of the images, which was "an unusual finding". He said it was "so unusual", he reviewed other cases at Great Ormond Street Hospital, to compare for a similar images. He said such gas would normally only be seen in heavy impacts such as road traffic incidents - this could obviously be discounted.
The other usual case would be "overwhelming infection" in organs of the body, such as sepsis, but Child A did not have any such identifiers.
He said he had "not seen this much gas" in any baby, other than in the case of Child D. He said it was 'consistent with air administered' to him, but 'not diagnostic' of it.
In cross-examination, he said he found no unexplained cases, and accepted this was an observational study, not a controlled study - the judge says for obvious reasons, the latter could not be carried out.
12:29pm
Prof Arthurs said radiographic evidence of air embolus was "rare", and in suspected cases, seeing anything on the radiograph was "rare". He said the absence of it on the radiograph did not rule that cause out.
He said one of the reasons is the imaging of the event is not important, the main priority is to save the life. An x-ray taken an hour later "wouldn't show anything".
www.chesterstandard.co.uk
The judge says Mr Myers "repeatedly expressed his opinions" on the merits of the expert evidence, questioning and challenging them. He says that is his right, but it is up to the jury to determine the reliability of the expert evidence.
The judge refers to Prof Owen Arthurs' evidence, who "considered each case on its own merits".
Prof Arthurs was provided with radiograph images of Child A. He noted the umbilical catheter was "slightly in the wrong place", and there was "a line of gas in front of the spine" on one of the images, which was "an unusual finding". He said it was "so unusual", he reviewed other cases at Great Ormond Street Hospital, to compare for a similar images. He said such gas would normally only be seen in heavy impacts such as road traffic incidents - this could obviously be discounted.
The other usual case would be "overwhelming infection" in organs of the body, such as sepsis, but Child A did not have any such identifiers.
He said he had "not seen this much gas" in any baby, other than in the case of Child D. He said it was 'consistent with air administered' to him, but 'not diagnostic' of it.
In cross-examination, he said he found no unexplained cases, and accepted this was an observational study, not a controlled study - the judge says for obvious reasons, the latter could not be carried out.
12:29pm
Prof Arthurs said radiographic evidence of air embolus was "rare", and in suspected cases, seeing anything on the radiograph was "rare". He said the absence of it on the radiograph did not rule that cause out.
He said one of the reasons is the imaging of the event is not important, the main priority is to save the life. An x-ray taken an hour later "wouldn't show anything".

Recap: Lucy Letby trial, July 3 - judge's summing up
The trial of Lucy Letby, who denies murdering seven babies at the Countess of Chester Hospital neonatal unit and attempting to murder 10 more, is…