Specialty-Specific Standard-of-Care Proof Is Mandatory; Res Ipsa in Retained-Object Cases Requires Control Over the Retention-Causing Decision

I. Introduction

This published decision of the Supreme Court of Kentucky arises from a total knee replacement performed on Deborah Lloyd at Norton’s Women’s and Children’s Hospital. During closure, a suturing needle became dislodged and went missing. Intra-operative imaging was ordered; radiologist Dr. Darren Cain read the x-ray as showing no unexpected foreign body. A later recovery-room x-ray was read by radiologist Dr. Christopher Henley, likewise without detecting the needle. Subsequent imaging revealed a metallic foreign body consistent with a suture needle, prompting additional procedures and alleged complications.

Lloyd sued multiple providers, including surgical assistant Sheila Slone and the Radiologists (Drs. Cain and Henley and their group, Diagnostic X-Ray Physicians, PSC (DXP)). After the surgeon (Dr. Griffin) settled, the case proceeded as to Slone and the Radiologists. The trial court granted summary judgment to both: to the Radiologists for lack of expert proof of the radiology standard of care, and to Slone because res ipsa loquitur did not eliminate the need for expert testimony where the record showed no negligence by Slone and no control by Slone over the retention-causing decisions. The Court of Appeals reversed. The Supreme Court of Kentucky granted discretionary review and reversed the Court of Appeals, reinstating both summary judgments.

The key issues were: (1) what qualifies as sufficient expert testimony to establish a specialist’s standard of care in medical negligence claims; and (2) the scope of Kentucky’s res ipsa loquitur doctrine—particularly “exclusive control”—in retained-foreign-object cases where multiple actors participate in the chain of events.

II. Summary of the Opinion

• Radiologists: The Court held that although an orthopedic surgeon (Dr. Dysart) might be qualified under KRE 702 to testify in some respects about radiology-related issues, Lloyd still failed to meet Kentucky’s substantive requirement of producing expert testimony that states the applicable radiology standard of care. Dr. Dysart expressly admitted he did not know the radiology standard of care. Because expert proof of the standard of care is an essential element in most medical negligence cases, summary judgment for the Radiologists was proper.
• Slone: The Court held res ipsa loquitur did not allow Lloyd to proceed without expert testimony against Slone. The record, including Lloyd’s own expert, supported that (a) the needle could become detached without negligence during suturing, and (b) Slone lacked authority and control over the subsequent decisions that led to the needle being retained (e.g., whether to reopen, further search, order/interpret imaging, or alter the treatment plan). Because the “instrumentality” causing the injury was the retained needle—and Slone did not control the retention decision-making—res ipsa did not apply to her, and summary judgment was appropriate.

III. Analysis

A. Precedents Cited

1. Expert testimony and the standard of care (medical negligence proof requirements)

The Court anchored its Radiologists holding in the familiar Kentucky rule that medical negligence plaintiffs typically must present expert testimony establishing “the applicable medical standard of care, any breach of that standard, and the resulting injury.” Blankenship v. Collier was the central authority, relying in turn on Perkins v. Hausladen. The Court treated these as imposing a minimum evidentiary threshold: without an expert who can articulate the relevant standard of care for the defendant’s “class” of practice, a jury trial becomes the kind of “futile exercise” CR 56 is designed to prevent.

The Court also reaffirmed the specialty/class-based framing of duty: Mitchell v. Hadl (quoting Blair v. Eblen) supplied the formulation that a physician must use the care and skill expected of a reasonably competent practitioner in the same class, in similar circumstances. That framing was pivotal to rejecting Lloyd’s invitation to treat an orthopedic surgeon’s “stunning miss” criticism as a proxy for radiology’s standard of care.

The Court drew reinforcement from cases distinguishing between identifying a lapse and proving the governing standard: Savage v. Three Rivers Med. Ctr. was cited to emphasize that expert testimony must identify the standard of care with specificity and connect it to the defendant’s conduct. The Court also cited Baptist Healthcare Sys., Inc. v. Miller to underscore that jurors generally lack common experience to determine standards in technical medical tasks, making expert definition of the standard essential.

On the summary judgment posture for missing expert proof, the Court relied on the same doctrinal line emphasized in Blankenship v. Collier, which itself referenced Neal v. Welker and Green v. Owensboro Medical Health System, Inc. for the proposition that, after sufficient time for disclosures, a plaintiff cannot avoid summary judgment with the suggestion that “something will turn up.”

2. Expert qualification vs. sufficiency of proof

The Court of Appeals had focused on expert qualification principles—citing Washington v. Goodman and Owensboro Mercy Health Sys. v. Payne, and also referencing Tapp v. Owensboro Med. Health Sys., Inc.—to argue that physicians may sometimes testify outside their specialty and that weight is for the jury. The Supreme Court did not substantially disagree with that admissibility/qualification premise; instead, it reframed the issue as one of sufficiency: even if the witness is qualified to testify, the plaintiff still must introduce testimony that actually states the relevant standard of care. Because Dr. Dysart admitted he did not know the radiology standard, the evidentiary gap was substantive, not merely a question of credibility.

3. Res ipsa loquitur in medical negligence and “exclusive control”

The Court treated Perkins v. Hausladen as the primary Kentucky articulation of res ipsa’s limited role in medical malpractice and relied on St. Elizabeth Med. Ctr., Inc. v. Arnsperger to describe when expert testimony may supply a res ipsa foundation in complex matters. It also cited classic res ipsa formulations: Schechter v. Hann (presumption arises when the injury-causing thing is under the defendant’s exclusive control and the event ordinarily does not occur with due care), and Jos. N. Rice Co. v. Grayson (inference of negligence arises where, by common knowledge, the accident would not have happened except for defendant’s wrongful act).

Critically, the Court used Savage v. Three Rivers Med. Ctr. for the proposition that applying res ipsa against a specific defendant requires “full control of the instrumentality which caused the injury,” and Nazar v. Branham to recognize that retained-object cases can involve multiple actors and relationships. But it then focused on the fact-specific allocation of “management or control” and invoked Ashland Coca-Cola Bottling Co. v. Byrne to explain res ipsa’s foundation in the negligence of the person with “management or control” of the injury-causing agency.

The Court also cited Lewis v. Wolk (quoting Scott v. The London & St. Katherine Docks Co.) for the traditional principle that when the event is of a kind that does not ordinarily occur absent negligence by those managing the thing, it affords reasonable evidence, absent explanation, that it arose from want of care.

4. Summary judgment framework

The Court applied Kentucky’s stringent but established summary judgment standards from Steelvest, Inc. v. Scansteel Serv. Ctr., Inc. (quoting Paintsville Hosp. Co. v. Rose), and reiterated appellate review principles from 3D Enters. Contracting Corp. v. Louisville & Jefferson Cnty. Metro. Sewer Dist. and Pearson ex rel. Trent v. Nat'l Feeding Sys., Inc.. It also cited Welch v. Am. Publ'g Co. of Ky. for the CR 56 focus on what is “of record rather than what might be presented at trial.”

B. Legal Reasoning

1. The Radiologists: the Court draws a hard line between “qualified to testify” and “provided the required elements”

The Court’s core move was to reject the Court of Appeals’ reframing of the dispute as merely whether a non-radiologist can testify against radiologists. The Supreme Court effectively separated:

1. Admissibility/qualification (KRE 702): whether the witness has “special knowledge, skill, experience, training, or education” that could assist the trier of fact; from
2. Sufficiency of proof: whether the plaintiff introduced expert evidence that actually states the defendant specialty’s standard of care.

Even assuming Dr. Dysart could testify about what he has “typically seen” radiologists do or about his own reading of films, he could not supply an indispensable element because he expressly disclaimed knowledge of the radiology standard of care. The Court regarded that admission as dispositive: a jury cannot determine breach “without first defining the standard.” The Court also rejected an “inferential” approach—i.e., letting jurors back into the standard of care by inferring from an assertedly obvious miss that the standard must have been violated. Kentucky law, the Court explained, treats standard and breach as distinct expert-proof requirements.

The decision thereby tightens litigation discipline in multi-specialty cases: a plaintiff may not rely on general medical criticism or cross-specialty indignation (“stunning miss”) as a substitute for testimony specifying the standard governing the defendant’s class of professional practice.

2. Slone: “exclusive control” is pegged to the injury-causing mechanism—retention—rather than the mere moment of loss

The Court’s res ipsa analysis is the most novel portion of the opinion. Rather than treating the needle’s presence in the body as automatically invoking res ipsa against the last person to hold it, the Court parsed the causal chain:

• The needle became detached (an event that can occur without negligence, per the record).
• The injury flowed from the needle being retained, not from the moment it detached.
• Once detached, key decisions (further searching, reopening, imaging decisions, concluding the operation) were controlled by the surgeon.

Under that framing, Slone’s “control” at the time of detachment did not equal “full control” over the instrumentality as it caused the injury (retention), and her role (statutorily limited under KRS 311.864’s “direct supervision” model) did not include authority over the decisive clinical choices. The Court characterized the needle, after detachment, as being under the constructive control of Dr. Griffin.

The Court additionally held that even if res ipsa could be “invoked” initially against Slone because she last handled the needle, the presumption was rebutted by record evidence: Lloyd’s expert conceded the detachment could happen without negligence and offered no criticism of Slone (“she’s fine”). With no expert proof of breach and res ipsa unavailable on these facts, Slone was entitled to summary judgment.

3. The dissent highlights a competing vision: team-based res ipsa and broader “control”

Justice Thompson’s dissent argued that retained-object cases presumptively implicate the surgical team and that res ipsa shifts the burden to “all members of the surgical team” to show they do not share responsibility. The dissent would have been more willing to treat the radiologist asked to read an intra-operative film as entering the “team” with constructive control, and would have treated the retained needle as a paradigmatic lay-understandable event.

The majority’s response, however, was to insist on defendant-specific application: res ipsa may show someone was negligent, but not necessarily this defendant—particularly where record evidence negates negligence and negates control over the retention-causing decisions.

C. Impact

1. Medical negligence litigation: stricter pleading/proof alignment in multi-specialty cases

The Radiologists holding will likely have immediate procedural consequences in Kentucky medical negligence practice:

• Plaintiffs must ensure at least one expert can state the specialty-specific standard of care for each defendant specialty—even where another specialist believes the error is obvious.
• “Qualification” disputes will not save a plaintiff from summary judgment if the proffered expert refuses or is unable to articulate the applicable standard of care.
• The decision reinforces CR 26.02 disclosure discipline: once disclosure deadlines pass, courts may treat missing-standard-of-care proof as a dispositive failure under Blankenship v. Collier.

2. Res ipsa in retained-object cases: narrowing against non-decisionmakers

The Slone holding meaningfully narrows the reflexive application of res ipsa in foreign-object cases. Going forward, Kentucky courts and litigants can expect closer attention to:

• What act actually “caused the injury” (e.g., mere loss vs. retention/abandonment of retrieval).
• Who had “full control” during the injury-causing phase, not merely physical possession at an earlier moment.
• Whether the presumption is rebutted by record evidence at the summary judgment stage.

Practically, plaintiffs may respond by: (a) naming and retaining experts who can address team roles and standards; and (b) developing the record about authority, protocols, and who had decision-making power at the moment the retention risk was managed or abandoned.

IV. Complex Concepts Simplified

Standard of care

The professional “rulebook” for what a reasonably competent provider in the defendant’s specialty would do in similar circumstances. Kentucky requires expert testimony to state that standard in most medical negligence cases.

Expert qualification (KRE 702) vs. expert sufficiency

A witness can be qualified to speak on medical matters (admissibility), yet still fail to provide the specific testimony needed to prove an element of the claim (sufficiency). Here, even if Dr. Dysart could testify, he did not (and said he could not) provide the radiology standard of care.

Res ipsa loquitur

A doctrine allowing negligence to be inferred from the nature of an event when it ordinarily does not happen without negligence and the cause is within the defendant’s control. It is not automatic; it is applied defendant-by-defendant based on control and the probabilities shown by the record.

Exclusive/full control and constructive control

“Control” is not just who last touched the object; it can mean who had managerial authority over the instrumentality and the choices that determined whether harm occurred. “Constructive control” refers to effective control through authority and decision-making power, even if not physically holding the object.

Summary judgment (CR 56.03)

A pretrial ruling ending the case when, based on the record, no genuine dispute of material fact exists and the movant is entitled to judgment as a matter of law. Kentucky’s cases emphasize it prevents trials where essential proof (like an expert standard of care) is missing.

Expert disclosures (CR 26.02)

Rules requiring parties to identify experts and summarize opinions/grounds by deadlines. If the deadline passes and the plaintiff lacks an expert to prove a required element, summary judgment may follow.

Surgical assistant scope (KRS 311.864)

The statute defines “surgical assisting” and requires “direct supervision” by a physician physically present. The Court used these limits to support its conclusion that Slone did not control the key retention-related decisions.

V. Conclusion

The Supreme Court of Kentucky’s decision reasserts two disciplined, defendant-specific constraints on medical negligence litigation: (1) even when an expert is arguably qualified to testify, the plaintiff must still present expert testimony that actually articulates the defendant specialty’s standard of care; and (2) res ipsa loquitur in retained-foreign-object cases is not a blanket shortcut to liability—its “control” requirement is tied to the injury-causing phase (here, the retention decision-making), and the inference may be defeated when the record shows no negligence and no control by the defendant.

In effect, the Court channels retained-object litigation away from generalized “someone must have been negligent” narratives and toward precise proof of (a) who had authority when the injury-producing decision was made, and (b) what the governing professional standard required for each defendant class.