Dunne v National Maternity Hospital [1989] IR 91 — The Medical Standard of Care in Ireland

Quick Summary: Dunne v National Maternity Hospital in One Paragraph§

Definition. Dunne v National Maternity Hospital [1989] IR 91 is the Supreme Court ruling that established the six principles governing the legal standard of care in every medical negligence claim in Ireland.

In Dunne v National Maternity Hospital [1989] IR 91 the Supreme Court of Ireland, in a unanimous judgment of Finlay CJ, established the six principles that govern the standard of care in every medical negligence claim in this jurisdiction. The case arose from a 1982 twin birth at the National Maternity Hospital in which a hospital protocol of monitoring only one foetal heart caused catastrophic injury. The principles were unanimously reaffirmed by a five-judge Supreme Court in Morrissey v HSE [2020] IESC 6 and most recently applied by the High Court in Gimenez Perez v Coombe Women and Infants University Hospital [2025] IEHC 396.

The Facts of Dunne v National Maternity Hospital§

On 20 March 1982 Catherine Dunne was admitted to the National Maternity Hospital in Holles Street, Dublin. She was pregnant with twins and had gone into labour approximately two weeks ahead of her estimated delivery date. The consultant obstetrician under whose care she had been accepted was Dr Reginald Jackson, the second defendant.

The Supreme Court synopsis records that labour commenced at approximately 9 a.m. and that Mrs Dunne was admitted to the labour ward at 11.15 a.m. The consultant had been present in the hospital earlier that morning but had left before her arrival. Throughout the early hours of her labour the hospital's monitoring practice — the practice at the centre of the litigation — was to record the heart rate of only one of the two foetuses, on the assumption that one twin's heartbeat served as a sufficient proxy for the other.

The first twin, William Dunne, was born naturally at approximately 5.15 p.m. The second twin was delivered stillborn approximately fifteen minutes later, with signs of skin maceration indicating death some time before delivery. William Dunne was born with severe and irreversible brain damage. The Supreme Court synopsis recorded that he was a spastic quadriplegic, completely dependent on others for every aspect of his care, and unaware of his condition.

The plaintiff, suing by his mother as next friend, brought proceedings in the High Court alleging that the brain injury was caused by the negligence of the hospital, its servants and agents, and of the consultant obstetrician, in their management of the labour and birth. The trial was held before a judge and jury — a procedural feature that has since ceased to apply to personal injury actions, civil juries having been abolished by the Courts Act 1988 — and ran over fifteen days in 1988. By order dated 2 August 1988 the jury awarded damages of £1,039,334 against both defendants.

The defendants appealed to the Supreme Court. The grounds of appeal were threefold. First, that the jury's findings of fact were not supported by the evidence. Second, that the damages were excessive. Third — and this was the issue that produced the principles — that the trial judge had misdirected the jury on the question of the appropriate legal standard for assessing medical negligence. It was that third ground that brought the Supreme Court to formulate, synthesise and restate the test that has governed Irish clinical negligence ever since.

The Legal Question§

What is the legal standard for medical negligence — and does compliance with general and approved practice provide a complete defence? The central legal question on appeal was the formulation of the standard of care applicable to medical practitioners in negligence. More specifically, the Court was required to consider whether — and to what extent — a defendant practitioner is shielded from liability by demonstrating that the impugned conduct conformed to a general and approved practice within the profession. The trial judge's directions to the jury on this question were challenged as inadequate. The Supreme Court took the opportunity to review the relevant Irish, English and Commonwealth authorities and to set out, in a single unanimous judgment of Finlay CJ, the principles which would thereafter govern the legal standard of care in medical negligence litigation in Ireland.

The Court's Decision: The Six Dunne Principles§

Six numbered principles delivered by Finlay CJ — verbatim below — that have governed Irish medical negligence since 1989. The Supreme Court allowed the appeals in part. On the question of negligence, the Court ordered a retrial on the grounds that the jury had been misdirected on the legal standard of care. On the question of damages, the Court set aside the jury's general damages award of £467,000 as excessive to an unreasonable degree, having regard to the ratio between that figure and the special damages and to the plaintiff's lack of awareness of his condition; the Supreme Court indicated, applying its earlier reasoning in Sinnott v Quinnsworth [1984] ILRM 523, that the appropriate range of general damages would have been in the region of £50,000 to £100,000. The asymmetry of the disposition is itself instructive: the jury's findings of fact on the management of the labour were not perverse on the evidence, but the legal directions on what constituted negligent conduct in the medical context did not, in the Supreme Court's view, give the jury the framework necessary to apply the law to the conflicting expert evidence. That misdirection was what required the case to be sent back for retrial. The retrial never produced a further reported judgment; the case was settled on the second listing. In delivering the unanimous judgment of the Court on the question of the appropriate legal standard, Finlay CJ set out the principles which, in his view, were applicable. Those principles — universally referred to since as the Dunne principles or the Dunne test — are reproduced verbatim below in the form in which they appear in the reported judgment at pp. 109–110.

1. Principle 1 · The core test The true test for establishing negligence in diagnosis or treatment on the part of a medical practitioner is whether he has been proved to be guilty of such failure as no medical practitioner of equal specialist or general status and skill would be guilty of if acting with ordinary care. Finlay CJ, Dunne v National Maternity Hospital [1989] IR 91 at p.109. This is the core test. It is calibrated to the standard of an ordinarily careful peer of equal status — not to a counsel of perfection.
2. Principle 2 · Deviation from approved practice If the allegation of negligence against a medical practitioner is based on proof that he deviated from a general and approved practice, that will not establish negligence unless it is also proved that the course he did take was one which no medical practitioner of like specialisation and skill would have followed had he been taking the ordinary care required from a person of his qualifications. Finlay CJ, [1989] IR 91 at p.109. Deviation from approved practice is not, by itself, negligence.
3. Principle 3 · The inherent defects exception If a medical practitioner charged with negligence defends his conduct by establishing that he followed a practice which was general, and which was approved of by his colleagues of similar specialisation and skill, he cannot escape liability if in reply the plaintiff establishes that such practice has inherent defects which ought to be obvious to any person giving the matter due consideration. Finlay CJ, [1989] IR 91 at p.109. The "inherent defects" exception — the most consequential of the six principles, and the one that distinguishes the Irish test most sharply from its UK counterpart.
4. Principle 4 · Honest difference of opinion An honest difference of opinion between doctors as to which is the better of two ways of treating a patient does not provide any ground for leaving a question to the jury as to whether a person who has followed one course rather than the other has been negligent. Finlay CJ, [1989] IR 91 at p.110. Clinical autonomy is protected: where two competent schools of thought genuinely exist, neither is negligent for following one rather than the other.
5. Principle 5 · The court's role It is not for a jury (or for a judge) to decide which of two alternative courses of treatment is in their (or his) opinion preferable, but their (or his) function is merely to decide whether the course of treatment followed, on the evidence, complied with the careful conduct of a medical practitioner of like specialisation and skill to that professed by the defendant. Finlay CJ, [1989] IR 91 at p.110. The court does not adjudicate clinical preference. It adjudicates whether the chosen course met the standard.
6. Principle 6 · Fact-finding allocation If there is an issue of fact, the determination of which is necessary for the decision as to whether a particular medical practice is or is not general and approved within the meaning of these principles, that issue must in a trial held with a jury be left to the determination of the jury. Finlay CJ, [1989] IR 91 at p.110. A drafting note on the allocation of fact-finding.

One textual feature of the principles requires a contemporary gloss. Principles 4, 5 and 6 refer expressly to the jury. Civil juries in personal injury actions were abolished by section 1 of the Courts Act 1988 with effect from 1 August 1988 — months before the Supreme Court delivered the Dunne judgment in April 1989. The Court retained the original wording because the case before it had itself been tried with a jury (under the old procedure) and because the issue on appeal turned on alleged misdirection of that jury. In every modern application of the principles, the function described as that of the jury is exercised exclusively by the trial judge sitting alone in the High Court Clinical Negligence List.

"He cannot escape liability if in reply the plaintiff establishes that such practice has inherent defects which ought to be obvious to any person giving the matter due consideration."

— Finlay CJ, Dunne v National Maternity Hospital [1989] IR 91 at p.109 (Principle 3)

The Key Terms Inside the Principles, Glossed§

Three phrases inside the principles do most of the doctrinal work: "equal specialist or general status and skill", "general and approved practice", and "ordinary care". Each has been refined by subsequent authority.

"Equal specialist or general status and skill" (Principle 1)

Principle 1 calibrates the standard to a peer of the defendant's grade and role. The phrase is not aspirational; it is comparative. A consultant obstetrician is benchmarked against the ordinarily competent consultant obstetrician; a senior house officer against the ordinarily competent senior house officer; a general practitioner against the ordinarily competent GP. This calibration matters in three recurring scenarios. First, a junior doctor performing a procedure that would normally be supervised by a consultant is held to the consultant's standard for that procedure, because the question is the standard required by the role the practitioner is in fact performing. Second, a GP providing emergency care for which a hospital would call a specialist is held to the standard of the GP in that emergency setting — the Daniels v Heskin "circumstances of the particular case" gloss survives unaffected by Dunne. Third, a locum standing in for a consultant is held to the consultant standard for the duration of the locum engagement. The systemic-negligence reading in Collins v Mid Western Health Board [1999] IESC 73 confirms that an admissions system permitting a junior to override a senior referral fails the standard at the institutional level.

"General and approved practice" (Principle 2)

What counts as a "general and approved practice" under Principle 2 is a question of fact informed by expert evidence. The phrase requires both generality — the practice must be widespread across the relevant specialty — and approval — the practice must be endorsed by competent peers, not merely tolerated. A single hospital protocol is not necessarily general and approved; a national clinical guideline issued by the relevant Royal College or by the HSE is strong evidence but, after Gimenez Perez v Coombe [2025] IEHC 396, not conclusive. Egan J in Gimenez Perez held that clinical guidelines are "informative guidance tools" and aids to clinical judgment, not absolute rules. A departure from a guideline does not, of itself, establish negligence under Principle 2. Conversely, compliance with a guideline does not, of itself, establish a defence under Principle 2, because the guideline itself may contain inherent defects within the meaning of Principle 3.

"Ordinary care" (Principles 1 and 2)

The qualifier "if acting with ordinary care" in Principle 1 (and its mirror in Principle 2) is a deliberate calibration. The standard is not perfection. The standard is not the highest competence at the leading edge of the specialty. The standard is the ordinary care that an ordinarily competent peer would exercise in the same role and circumstances. Clarke CJ in Morrissey v HSE [2020] IESC 6 reframed the operative formulation as a "standard of approach" to make this point explicit, after the High Court trial judge had used "absolute confidence" language that imported a counsel-of-perfection threshold into the Dunne analysis. The corrected formulation is that the practitioner is required to apply "a standard appropriate to a person of equal specialist or general status acting with ordinary care", with the corollary that a failure to apply that standard amounts to negligence.

The Commonwealth Authority Finlay CJ Drew On: Hunter v Hanley§

The pedigree of the Dunne standard runs through Scotland as well as Ireland. Finlay CJ's judgment expressly reviewed Commonwealth authority before settling on the six-principle formulation, and the closest doctrinal cousin in any common law jurisdiction is the Scottish decision in Hunter v Hanley 1955 SC 200, in which the Inner House of the Court of Session set out a three-part test for medical negligence that closely prefigures Principles 1 and 2 of Dunne.

Lord President Clyde in Hunter v Hanley formulated the test in three elements: (i) that there must be a usual and normal practice; (ii) that the defender has not adopted that practice; and (iii) that the course the defender did adopt is one which no professional person of ordinary skill would have taken if acting with ordinary care. The third element — "no professional person of ordinary skill … if acting with ordinary care" — is the formulation that Finlay CJ ultimately adopted into the Irish standard. The Scottish formulation predates the English Bolam direction by two years and is structurally closer to the Irish test than either Bolam or Bolitho.

The practical consequence of this lineage is that, where Irish authority on a fine point of the Dunne test is silent, Scottish authority applying Hunter v Hanley is more persuasive than English authority applying Bolam. Practitioners should be alert to the distinction. The Scottish position is not binding in Ireland, but it is the Commonwealth authority Finlay CJ explicitly built upon, and it remains a defensible aid to interpretation of the Irish principles.

The Doctrinal Lineage: Daniels v Heskin, O'Donovan and the "Inherent Defects" Exception§

The six principles synthesised earlier Irish authority running back to Daniels v Heskin [1954] IR 73 and O'Donovan v Cork County Council [1967] IR 173. The Dunne principles were a synthesis, not an invention. Finlay CJ's judgment expressly reviewed Irish, English, Scottish and Commonwealth authorities before settling on the six-principle formulation. Two pre-Dunne Irish decisions are doctrinally foundational and are rarely surfaced in modern competitor commentary on the test.

Daniels v Heskin [1954] IR 73 — the original Irish formulation

The earliest reported Irish medical negligence decision of substantive doctrinal weight is Daniels v Heskin [1954] IR 73, a Supreme Court appeal arising from a doctor's stitching of a patient's perineum during which the needle broke and a fragment was left in the patient's body. The majority of the Court (Murnaghan, O'Byrne, Lavery and Kingsmill Moore JJ; Maguire CJ dissenting) held that the defendant had not acted negligently. Lavery J at p.79 of the report set out the formulation that would govern Irish medical negligence for the following thirty-five years: the defendant doctor was bound "to possess and use reasonable skill, having regard to his position as a general practitioner and in the circumstances of the particular case."

The Daniels formulation is the direct ancestor of Principle 1 of Dunne. It establishes two features carried through to the modern test: (i) the standard is calibrated by the practitioner's grade and role, not against an idealised counsel of perfection; and (ii) circumstances matter — the same act may be negligent in one setting and not in another. Finlay CJ in Dunne retained both features while sharpening the second principle and adding the inherent defects exception in the third.

O'Donovan v Cork County Council [1967] IR 173 — the inherent defects forerunner

Principle 3 — the inherent defects exception — is the most jurisprudentially significant of the six, and it is the one feature of the Irish standard that has resisted the UK convergence pressure most strongly. Its origin is older than Dunne itself. It traces directly to the judgment of Walsh J in the Supreme Court in O'Donovan v Cork County Council [1967] IR 173, a decision concerning the conduct of an anaesthetist during surgery.

In O'Donovan, Walsh J formulated the proposition that compliance with a general and approved practice was a strong but not conclusive defence to a charge of negligence. Where the impugned practice contained a defect that ought to have been obvious to anyone giving the matter due consideration, the universality of the practice did not insulate the defendant from liability. Finlay CJ in Dunne expressly adopted that formulation, citing O'Donovan as authority and codifying it as the third of his principles.

"The defendant was bound to possess and use reasonable skill, having regard to his position as a general practitioner and in the circumstances of the particular case."

— Lavery J, Daniels v Heskin [1954] IR 73 at p.79 (the pre-Dunne Irish standard)

"Neglect of duty does not cease by repetition to be neglect of duty."

— Walsh J, O'Donovan v Cork County Council [1967] IR 173 (the forerunner to Dunne Principle 3)

The inherent defects doctrine extends beyond medical practice. The Supreme Court applied parallel reasoning in Roche v Peilow [1985] IR 232 (the duty of a solicitor when conveyancing) and the High Court applied the inherent defects analysis in professional negligence settings outside medicine. The unifying thread is that an Irish court retains a residual supervisory jurisdiction over professional standards: peer endorsement is powerful evidence but it is not the final word.

For practitioners drafting expert reports under the Dunne test, the practical consequence is twofold. First, an expert who proposes to argue under Principle 3 must identify the defect in the impugned practice and explain why it ought to have been obvious. Second, the defect must be one accessible to ordinary reasoning — not one requiring specialist insight. Where the inherent defect is established, the otherwise-complete defence under Principle 2 (compliance with approved practice) collapses.

Why Dunne Matters: The Standard of Care That Governs Every Medical Negligence Claim in Ireland§

The doctrinal weight of Dunne is difficult to overstate. The standard of care it articulates is the gateway issue in every clinical negligence action in this jurisdiction. The plaintiff cannot reach causation, damages, contributory negligence, vicarious liability, or any other downstream issue until the Dunne threshold for breach of duty has been crossed. The judgment is the foundational text that an Irish solicitor instructs every medical expert to address, and it is the framework that the State Claims Agency requires its defending solicitors to engage with on every clinical claim it manages.

Economically the standard governs an exposure of considerable scale. The State Claims Agency's reporting indicates that clinical negligence damages paid in 2024 reached approximately €210.5 million, with outstanding clinical liability under management running in the multi-billion-euro range. Every euro of that exposure passes through the Dunne filter at the breach-of-duty stage. The page on breach of duty in Irish medical negligence sets out how the principles are operationalised in practice.

Doctrinally the persistence of Dunne is also significant for what it has resisted. The Irish standard has not migrated toward a "Bolitho-style" rationality test as a separate gateway, has not absorbed the Australian Rogers v Whitaker patient-centric formulation into the breach analysis (informed consent has its own carve-out, addressed below), and has not been displaced by clinical guidelines (addressed under Gimenez Perez below). The principles remain the legal standard. The mechanics around them — open disclosure, expert evidence, procedural management — have changed substantially. The test itself has not.

Subsequent Treatment: Morrissey v HSE (2020) and Gimenez Perez v Coombe (2025)§

A five-judge Supreme Court reaffirmed Dunne in 2020; the High Court most recently applied it to clinical guidelines in 2025.

Morrissey v HSE [2020] IESC 6 — the five-judge reaffirmation

The most authoritative modern statement of Dunne is the unanimous judgment of the Supreme Court in Morrissey v HSE [2020] IESC 6, delivered by Clarke CJ on behalf of a five-judge bench. The case concerned the reporting of cervical smears under the CervicalCheck screening programme. The High Court trial judge, Cross J, had held the defendants liable in part on the basis of a standard articulated in terms of "absolute confidence" in the reading of a smear before it could be classified as negative.

The Supreme Court corrected the formulation. In Clarke CJ's words, "the principles set out by Finlay CJ in Dunne continued to represent the law in this jurisdiction." The Court reframed the issue in terms of the "standard of approach" of a competent practitioner: Dunne's ordinarily competent peer was not required to achieve absolute confidence — that was a counsel of perfection inconsistent with Principle 1. The plaintiff prevailed on the breach issue, but on a properly framed Dunne analysis rather than on the High Court's misformulation.

The doctrinal significance of Morrissey for this page is that it places Dunne's pedigree beyond practical doubt for the foreseeable future. A five-judge Supreme Court unanimously reaffirmed the principles thirty-one years after Finlay CJ first set them out. A judicial reformulation of the test is now correspondingly unlikely without legislative intervention. The deeper treatment of Morrissey itself, including its quantum and non-disclosure components, sits at Morrissey v HSE — CervicalCheck Liability and the Standard of Approach.

"The standard of approach of a medical professional is to apply a standard appropriate to a person of equal specialist or general status acting with ordinary care. A failure to act in that way will amount to negligence."

— Clarke CJ, Morrissey v HSE [2020] IESC 6 (paraphrasing Principle 1 in the corrected form)

Gimenez Perez v Coombe Women and Infants University Hospital [2025] IEHC 396 — clinical guidelines as evidence, not as substitute

The most recent material application of Dunne is the judgment of Ms Justice Egan in Gimenez Perez v Coombe Women and Infants University Hospital and the HSE [2025] IEHC 396. The case concerned the management of a primary post-partum haemorrhage following the plaintiff's delivery at the Coombe in October 2019, and her subsequent collapse with secondary haemorrhage two and a half weeks later on 4 November 2019, treated at Midland Regional Hospital, Portlaoise.

The plaintiff's case pressed two arguments that Dunne-era jurisprudence had not previously squarely addressed: that the defendant hospitals had departed from named clinical guidelines and that this departure was itself negligence, and that imperfect contemporaneous note-keeping should be treated as evidence of breach. The High Court rejected both as automatic conclusions while clarifying the proper place of each within the Dunne analysis.

On clinical guidelines Egan J held that guidelines are "informative guidance tools" and aids to clinical judgment, not absolute rules. Departure from a guideline does not, of itself, establish negligence. The plaintiff must prove that no reasonably competent practitioner of equal status would have departed from the guideline in the clinical context — the test remains the Dunne test, with the guideline serving as evidence of what competent practice ordinarily looks like. The Court applied Principles 4 and 5 to find that two legitimate schools of thought existed on the management of the secondary haemorrhage (conservative observation versus early surgical evacuation), and that the hospital's election of conservative management was within the range protected by an honest difference of competent opinion.

On note-keeping Egan J accepted that contemporaneous records are the "gold standard" but cautioned against equating imperfect notes with negligence, particularly notes prepared in acute clinical situations. The claim was dismissed.

For practitioners, the practical effect of Gimenez Perez is to confirm that any plaintiff strategy built on bare departure-from-guideline will fail. The expert report must engage with the Dunne threshold directly: the departure must be one no reasonably competent peer would have made. Mason Hayes & Curran's analysis of the judgment frames the principle accurately: "Clinical guidelines serve to guide, but Dunne principles remain the standard of care."

Treatment summary table

The Jurisdictional Schism: Dunne and the UK Bolam/Bolitho Test§

The Irish test sets a higher bar than English Bolam: a defendant must show no peer would have departed from the chosen course, not merely that a "responsible body" supports it. The Irish standard is frequently — and inaccurately — described as Ireland's equivalent of the English Bolam test. The two tests share common law ancestry but differ materially in the threshold they impose on peer endorsement.

The English test originated in Bolam v Friern Hospital Management Committee [1957] 1 WLR 582. In that case McNair J directed the jury that a doctor "is not guilty of negligence if he has acted in accordance with a practice accepted as proper by a responsible body of medical men skilled in that particular art." The threshold under Bolam is that of a responsible body: peer endorsement by a recognised school of opinion is, in principle, sufficient.

The Irish test as articulated in Dunne sets the bar higher. Under Principle 1 the plaintiff must prove that the defendant was guilty of a failure that no medical practitioner of equal status would have committed if acting with ordinary care. The Irish formulation thus contemplates the entire body of competent peers, not merely a responsible subset. Where competing schools of thought genuinely exist, Principles 4 and 5 protect the defendant who followed one of them — but the protection is constructed differently from the Bolam threshold.

The English position was qualified by the House of Lords in Bolitho v City & Hackney Health Authority [1998] AC 232, which added a requirement that the body of medical opinion relied upon must withstand logical scrutiny — peer endorsement was no longer self-validating. Bolitho narrowed Bolam but did not abolish it. The Irish position under Principle 3 — the inherent defects exception — addresses the same anxiety as Bolitho but reaches it independently and through a more demanding test: an Irish court can strike down a universally accepted practice on the basis of an obvious inherent defect without engaging the Bolitho "logical basis" inquiry.

English Court of Appeal and Supreme Court authority is persuasive only in Ireland. The Irish Supreme Court has consistently maintained that the formulation in Dunne is the operative test and that English developments are illustrative rather than determinative. This jurisdictional distinction is consequential for any practitioner instructing experts who practise in both jurisdictions: the expert must be briefed to apply the Dunne standard, not the Bolam/Bolitho standard.

The Consent Carve-Out: Where Dunne No Longer Applies§

Informed consent is governed by a reasonable-patient test, not by Dunne — the two doctrines run on parallel tracks. The Dunne principles govern the standard of diagnosis and treatment. They do not govern the standard of disclosure that precedes consent to a procedure. That field of law has bifurcated.

Kearns J in the High Court in Geoghegan v Harris [2000] 3 IR 536 — a case concerning the failure to warn a patient about a rare risk of severe neuropathic pain following a dental bone graft — explicitly declined to apply Dunne to the duty of disclosure. He held that the standard for warning patients of material risks was to be measured by reference to what a reasonable patient in the position of the plaintiff would consider significant, with the court as the final arbiter of materiality. The doctor-centric peer standard of Dunne was, on Kearns J's analysis, structurally unsuited to consent.

The Supreme Court adopted and refined the patient-centric standard in Fitzpatrick v White [2007] IESC 51, a case concerning the timing of a warning given thirty minutes before cosmetic squint-correction surgery. The Court confirmed that the duty to disclose material risks is independent of the Dunne test. The position now closely mirrors, but predates the Irish adoption of, the English Supreme Court's reasoning in Montgomery v Lanarkshire Health Board [2015] UKSC 11.

The practical consequence for litigation strategy is that a single course of medical care may be assessed under two different standards: the act of treatment under Dunne, and the warning that preceded the patient's consent under the reasonable-patient test. Detailed treatment of the consent standard sits at lack of informed consent claims in Ireland.

The 2024–2026 Procedural Framework Around Dunne§

The substantive standard articulated in Dunne has been remarkably stable. The procedural framework within which the standard is litigated has changed substantially in the period 2023–2025.

Patient Safety (Notifiable Incidents and Open Disclosure) Act 2023

The Patient Safety (Notifiable Incidents and Open Disclosure) Act 2023 commenced on 26 September 2024. It imposes a statutory duty on healthcare providers to disclose specified categories of notifiable patient safety incidents to the patient or, where applicable, their family. Open disclosure made under the Act does not, of itself, amount to an admission of liability and cannot be relied on as such in subsequent proceedings — a balance the Oireachtas struck to encourage candour without penalising the disclosing institution. From the plaintiff's perspective the Act delivers what historically had to be obtained by Subject Access Request, civil discovery, or inquest evidence: a documented factual narrative of what occurred. That narrative is the foundation on which the medical expert will then apply the Dunne test.

The Injuries Resolution Board exemption (s.3(d) PIAB Act 2003)

Medical negligence claims are exempt from assessment by the Injuries Resolution Board — formerly known as the Personal Injuries Assessment Board until its 2023 rebrand — by virtue of section 3(d) of the Personal Injuries Assessment Board Act 2003. The statutory exclusion exists because medical negligence claims turn on contested expert evidence and the Dunne breach analysis cannot be administered on a documents-only basis. The practical effect is that a claimant whose claim engages Dunne proceeds directly to the High Court without the IRB authorisation step that governs other personal injury actions.

HC131 and HC132 — the Clinical Negligence List (28 April 2025)

Practice Directions HC131 and HC132, issued by the President of the High Court and effective from 28 April 2025, established a dedicated Clinical Negligence List managed by judges with specialist experience in the field. HC132 establishes the list within the Dublin Personal Injuries List, with a designated Judge in Charge. HC131 requires a party seeking a trial date to give the other parties 28 days' notice of the intended application and to file a Certificate of Compliance confirming that the case is fully pleaded, that expert reports have been exchanged (or offered for exchange with reasonable time to respond), and that the party undertakes to offer mediation within three weeks of the trial date being fixed. The judge managing the list may set timetables for the exchange of expert reports and restrict the introduction of late expert evidence.

The structural consequence for Dunne-based litigation is that the breach analysis must now be substantively complete — with supportive expert evidence in hand — well before a trial date is fixed. The era of "trial by ambush" on Principle 1 expert formulations is effectively closed. The page on expert medical reports in Irish medical negligence claims sets out how to draft to the Dunne framework under the new directions.

The two-year limitation period

The limitation period for medical negligence in Ireland is two years from the date on which the cause of action accrued, or from the date of knowledge, whichever is later — under section 2 of the Statute of Limitations (Amendment) Act 1991. The date-of-knowledge mechanism is consequential where the breach of the Dunne standard becomes apparent only on subsequent investigation, as it commonly does in delayed-diagnosis and retained-instrument cases.

"The Court must identify as a matter of fact what would an ordinary competent professional of the type and skill of the individual concerned have done, and then consider whether the defendants had complied with that standard."

— Egan J, Gimenez Perez v Coombe Women and Infants University Hospital and HSE [2025] IEHC 396 (applying the Dunne framework)

Dunne in Practice: How Solicitors and Experts Apply the Test§

The operational application of Dunne in practice runs through expert evidence. An Irish solicitor instructing a medical expert in support of a clinical negligence claim will frame the expert's task in terms that map onto Finlay CJ's principles. A well-drafted expert report under Dunne will, as a matter of common practitioner workflow, address the following in sequence.

First, the expert must identify the specialty and grade of the defendant practitioner and the standard expected of an ordinarily competent peer at that level. Principle 1 is calibrated to equal specialist or general status and skill; an opinion that benchmarks a consultant against a registrar's standard fails the test at the first stage.

Second, the expert must address whether the impugned conduct conformed to a general and approved practice. Where it did not, the expert must opine — in the precise Dunne formulation — that no medical practitioner of like specialisation and skill, exercising ordinary care, would have followed the course the defendant followed. Loose formulations ("the standard of care was breached") do not engage Principle 2 and are vulnerable to challenge.

Third, where the defendant relies on compliance with approved practice as a defence, the expert addressing breach must identify whether the practice itself has inherent defects within the meaning of Principle 3. The defect must be one obvious to anyone giving the matter due consideration — accessible to ordinary reasoning, not requiring specialist insight. An expert report that does not engage Principle 3 in approved-practice cases concedes the defence prematurely.

Fourth, the expert must consider whether there is genuinely a competing school of thought protected by Principles 4 and 5. Where two responsible schools genuinely exist, the defendant's election between them is not negligence. The plaintiff's expert must be in a position to say either that no responsible school supports the defendant's conduct, or that the defendant's school of thought is foreclosed by Principle 3.

Counter-intuitive practitioner insight: many claimants assume that if the hospital "followed its own protocol" there can be no negligence. Principle 3 explicitly permits challenge to the protocol itself where its inherent defects ought to be obvious. The 1982 single-foetal-heart monitoring protocol in Dunne is the original example. The 2019 management of secondary post-partum haemorrhage argued for in Gimenez Perez was not such an example — because two responsible schools of thought existed on conservative versus early-surgical management, the inherent defects route was closed and the case turned on Principles 4 and 5.

Clinical Scenarios Mapped to Dunne Principles§

The principles work most clearly when applied to concrete clinical scenarios. The table below maps representative scenarios to the principle the analysis is likely to turn on and the likely outcome on the orthodox Dunne reading. Use the interactive finder to see which principle a given scenario engages.

Frequently Asked Questions§

Related Questions§

Related Cases and Resources§

Related landmark cases on this site

• Morrissey v HSE [2020] IESC 6 — CervicalCheck Liability and the Standard of Approach
• Reeves v Carthy — Medical Causation in Ireland
• Byrne v Ryan — Causation Standard
• Philp v Ryan — Periodic Payments and Loss of Chance

Pages on Irish medical negligence

• Medical Negligence Claims in Ireland
• Breach of Duty Under the Dunne Principles
• How to Prove Medical Negligence in Ireland
• Expert Medical Reports Under Dunne
• Lack of Informed Consent Claims (the Geoghegan/Fitzpatrick standard)

Primary sources

• Dunne v National Maternity Hospital [1989] IR 91 — full judgment text (vLex Ireland)
• Morrissey v HSE [2020] IESC 6 — judgment on BAILII
• Practice Directions HC131 and HC132 — Clinical Negligence List, courts.ie
• Patient Safety (Notifiable Incidents and Open Disclosure) Act 2023
• Statute of Limitations (Amendment) Act 1991
• Personal Injuries Assessment Board Act 2003

References§

1. Dunne (an infant) v National Maternity Hospital and Jackson [1989] IR 91; [1989] ILRM 735; 1989 WJSC-SC 165, Supreme Court (Finlay CJ, Griffin J, Hederman J), judgment delivered 14 April 1989. Full judgment text: vLex Ireland.
2. Daniels v Heskin [1954] IR 73, Supreme Court (Murnaghan, O'Byrne, Lavery, Kingsmill Moore JJ; Maguire CJ dissenting). Full judgment text: vLex Ireland.
3. O'Donovan v Cork County Council [1967] IR 173, Supreme Court (Walsh J). Full judgment text: vLex Ireland.
4. Roche v Peilow [1985] IR 232, Supreme Court.
5. Reeves v Carthy & O'Kelly [1984] IR 348, Supreme Court.
6. Sinnott v Quinnsworth Ltd [1984] ILRM 523, Supreme Court (O'Higgins CJ).
7. Collins v Mid Western Health Board [1999] IESC 73; [2000] 2 IR 154, Supreme Court (Keane J). Full judgment text: BAILII.
8. Geoghegan v Harris [2000] 3 IR 536; [2000] IEHC 129, High Court (Kearns J), judgment delivered 21 June 2000. Full judgment text: vLex Ireland.
9. Fitzpatrick v White [2007] IESC 51, Supreme Court. Full judgment text: BAILII.
10. Morrissey v HSE [2020] IESC 6, Supreme Court (Clarke CJ, with O'Donnell, McKechnie, MacMenamin, Charleton JJ). Full judgment text: BAILII.
11. Gimenez Perez v Coombe Women and Infants University Hospital and HSE [2025] IEHC 396, High Court (Egan J), judgment delivered July 2025. Court report: The Irish Times, 14 July 2025.
12. Hunter v Hanley 1955 SC 200, Inner House of the Court of Session (Lord President Clyde) — Scotland; closest Commonwealth analogue to Dunne. Full judgment text: BAILII (Scotland).
13. Bolam v Friern Hospital Management Committee [1957] 1 WLR 582, Queen's Bench Division (McNair J) — England and Wales; persuasive only in Ireland. Full judgment text: BAILII (E&W).
14. Bolitho v City & Hackney Health Authority [1998] AC 232; [1997] UKHL 46, House of Lords (Lord Browne-Wilkinson) — England and Wales; persuasive only in Ireland. Full judgment text: BAILII (UK).
15. Montgomery v Lanarkshire Health Board [2015] UKSC 11, UK Supreme Court — United Kingdom; persuasive only in Ireland.
16. Courts Act 1988 (Act No. 14 of 1988), section 1 — Irish Statute Book.
17. Civil Liability Act 1961 (Act No. 41 of 1961), section 34 — Law Reform Commission revised text.
18. Statute of Limitations (Amendment) Act 1991 (Act No. 18 of 1991), section 2 — Irish Statute Book.
19. Personal Injuries Assessment Board Act 2003 (Act No. 46 of 2003), section 3(d) — Irish Statute Book.
20. Patient Safety (Notifiable Incidents and Open Disclosure) Act 2023 (Act No. 10 of 2023), commenced 26 September 2024 — Irish Statute Book.
21. Practice Directions HC131 and HC132 (Clinical Negligence List), President of the High Court, effective 28 April 2025 — courts.ie.
22. State Claims Agency, clinical negligence damages paid data for 2024 (€210.5 million), as published in the National Treasury Management Agency Annual Report 2024 (July 2025).