There is a certain kind of plaintiff’s theory that reads like it wandered in from a wellness blog rather than a products liability treatise. Today’s case is one of them. A plaintiff who eats vegan for medical reasons sues a device manufacturer because nobody warned her, personally, that the implant going into her shoulder had a bovine pedigree. No allegation that the warnings to her surgeon were wrong. No allegation that the device malfunctioned. Just a claim that the manufacturer owed her, the patient, a duty to check her diet. The court took one look at that theory and sent it back to the kitchen.
The case is Petty v. Schwartz, No. 71820/2025, slip op. at 1 (Sup. Ct. Westchester Cnty. Sept. 1, 2026), and it is a tidy little pleading-stage win worth flagging even though the underlying facts are, frankly, a little unusual. Plaintiff underwent arthroscopic shoulder surgery, during which her surgeon implanted a bovine-collagen device. Plaintiff alleges that she suffers from an autoimmune disease that causes her immune system to attack cartilage tissue, and that collagen products can trigger or worsen her symptoms — which is why, she alleges, she maintains a vegan diet and lifestyle. She claims the bovine-collagen implant triggered a permanent, severe, and debilitating reaction. Id. at 1-2.
The only claim against the device manufacturer was styled as a cause of action for lack of informed consent — a theory that plaintiff more or less conceded, in her own opposition brief, does not work against a manufacturer. Plaintiff and defendant relied on the same New York authority, which holds that a device manufacturer is not a medical practitioner and does not have a physician-patient relationship with the plaintiff. Id. at 3. Not to mention, the manufacturer’s duty to warn runs to the treating physician – the learned intermediary – not the patient directly. Id. at 4.
So instead of defending the pleaded claim, plaintiff tried to argue her allegations, properly construed, stated claims for failure to warn the physician and the wider medical community, negligent undertaking, and negligent marketing and promotion. The court was not interested in construing anything that generously. Under New York’s pleading standard, a court accepts the facts alleged as true and gives plaintiff the benefit of every favorable inference, but bare legal conclusions do not get that benefit. While the standard may forgive “imperfect labeling” of a claim, it does not supply missing allegations. Id.at 3 & 4.
On failure to warn, plaintiff never alleged that the implant’s labeling was inadequate, that contraindications were omitted, that screening information was deficient, or — critically — that any warning deficiency proximately caused her injury. A failure-to-warn claim needs a warning that was actually deficient and a causal link to the injury. Plaintiff supplied neither, just the conclusory assertion that the manufacturer should have told somebody, somewhere, about the bovine collagen. Id. at 4.
On negligent undertaking, the complaint did not allege that the manufacturer undertook to render any service, or that any act by its representatives — two employees present in the operating room — launched or increased plaintiff’s risk of harm. There were no allegations that those representatives gave advice, made recommendations, selected the device, participated in the surgery, or communicated with the surgeon about whether the implant was appropriate for this particular patient. Id. Simply having your people in the room when your product gets used is not, by itself, an undertaking that creates a duty of care to the patient.
On negligent marketing and promotion, plaintiff alleged that the manufacturer provided incentives or otherwise induced orthopedic surgeons generally, and this surgeon specifically, to use the implant. The court called this exactly what it is — conclusory and speculative. There was no allegation tying any marketing or promotional conduct to negligence, and no allegation linking that conduct to plaintiff’s injury. Id. Marketing a product, even enthusiastically, is not a tort, and “the manufacturer wanted its device used” is not a theory of liability.
With all three unpled theories rejected, and the only pleaded claim conceded to be non-viable, the claims against the manufacturer were dismissed in their entirety. Plaintiff also asked, in her opposition brief, for leave to amend if the court ruled against her. The court declined even to consider the request. There was no notice of motion or cross-motion seeking leave to amend, and no proposed amended pleading as required by local rules. A request for affirmative relief tucked into an opposition brief is not a motion, and courts are under no obligation to treat it as one. Which is a good procedural point for defense counsel to remember. If plaintiff wants a second bite, plaintiff has to actually ask for one the right way — a real motion, with a real proposed pleading attached, so the court and the defendant can evaluate exactly what is being proposed. A one-line request in a footnote-adjacent aside does not cut it, and this court was not shy about saying so.
Kudos to the court for not letting plaintiff dress up an admittedly non-viable informed consent claim as three different negligence theories she never actually pleaded. The learned intermediary rule exists precisely so that manufacturers can rely on communicating with the physician, not on independently vetting every patient’s dietary practices, religious beliefs, or lifestyle choices before a surgeon selects a device. Extending informed consent, or its negligence-flavored cousins, to manufacturers based on nothing more than a sales rep’s presence in the operating room would turn every device company into a second physician for consent purposes — a result no court should welcome, and this one correctly refused to create.
As for the vegan angle — we get it, dietary and religious restrictions on medical products are a real and serious issue, and patients are entitled to make informed choices about what goes into their bodies. But the obligation to have that conversation, and to obtain that consent, belongs to the treating physician, not the company that manufactured the device sitting on the shelf. The surgeon is the one who examines the patient, discusses the options, and decides what to implant. Try to put that obligation on the manufacturer instead, and you get a lawsuit that is dismissed as a matter of law — no meat required.





