The Supreme Court has ruled that a 14-month-old Donegal child should undergo the PKU screening test despite his parents’ refusal to allow a blood sample to be taken.
The North Western Health Board brought the case concerning the youngest of H.W. and C.W.’s five children, identified in the proceedings as “Paul”. His parents said they did not object to screening in principle but would permit only non-invasive methods such as urine or hair samples because they opposed puncturing his skin to obtain blood.
The High Court had refused to override their decision, finding that they were caring and conscientious parents and that their refusal did not justify exceptional State intervention.
The Supreme Court disagreed. Chief Justice Keane said the uncontested medical evidence established that the Guthrie heel-prick test could detect serious metabolic and endocrine disorders including phenylketonuria, galactosaemia, homocystinuria, maple syrup urine disease and hypothyroidism. Untreated, those conditions could cause severe intellectual disability, life-threatening illness or death, while early detection could permit effective treatment.
The court accepted that the procedure involved only minimal discomfort and negligible medical risk. It also accepted evidence that urine testing was less reliable and that hair testing was not regarded as a satisfactory alternative.
The ruling did not establish that every disputed medical procedure could be imposed on children. The court stressed that such cases depend on their evidence and circumstances, and that parental wishes ordinarily carry substantial weight.
However, it held that parents could not insist on a decision which, on the evidence in this case, unnecessarily exposed their child to grave and avoidable health risks. The child’s welfare and constitutional rights were the paramount consideration.
The Supreme Court therefore allowed the Health Board’s appeal and declared that carrying out the PKU test was in Paul’s best interests and that his parents’ refusal failed to vindicate his personal rights.