- Court
- New York Supreme Court, Appellate Division, First Department
- Case Name
- Katiraeifar v. New York-Presbyterian
- Slip Op. No.
- 2026 NY Slip Op 03268
- Decision Date
- May 26, 2026
- Docket No.
- Index No. 162653/15, Appeal No. 6714, Case No. 2025-05364
Background
The estate of a deceased patient brought a medical malpractice action against New York-Presbyterian, The University Hospital of Columbia and Cornell. The decedent, who suffered from progressive ALS, was being treated in the emergency department and required transfer to a hospital floor. During the transfer, the hospital used Ambu bagging (manual ventilation) with monitoring of the patient’s vital signs. The transfer was documented as uncomplicated, though the decedent’s oxygenation decreased after the transfer.
Plaintiff alleged that the hospital’s use of intermittent Ambu bagging during the transfer departed from the standard of care and proximately caused the decedent to develop hypoxia, contributing to his injuries. The decedent passed away nine months later.
New York-Presbyterian moved for summary judgment dismissing the medical malpractice claim. The hospital’s expert opined that the use of Ambu bagging with vital signs monitoring during the transfer was appropriate and within the standard of care, and that there was no evidence the decedent suffered a permanent anoxic injury during the transfer. The expert further explained that the post-transfer shortness of breath was caused by the development of mucus plugs and aggressive pneumonia, and that the decedent ultimately died from progressive ALS. Supreme Court (Kelley, J.) denied the motion, and the hospital appealed.
Holding
The First Department unanimously reversed and granted the hospital’s motion for summary judgment, dismissing the medical malpractice cause of action. The court found that the hospital made a prima facie showing of entitlement to summary judgment through its expert, who established that the treatment did not depart from the standard of care and did not proximately cause the claimed injuries.
In opposition, plaintiff’s experts’ affirmations were found to be critically deficient. On the standard of care, plaintiff’s expert did not explain why the use of an Ambu bag with monitoring of vital signs was inappropriate. While the expert discussed testimony that use of the Ambu bag was intermittent, he did not explain that constant bagging or bagging at a particular frequency was necessary. On proximate causation, plaintiff’s causation experts offered only conclusory opinions regarding the alleged development of hypoxia and its impact on the decedent. Critically, both causation experts failed to address the defense expert’s specific causation opinions regarding mucus plugs, pneumonia, and the progressive ALS. Given these critical omissions, plaintiff failed to rebut the hospital’s prima facie showing.
Key Takeaways
- In medical malpractice cases, opposing experts must specifically address and rebut the defense expert’s opinions; conclusory disagreements are insufficient to create triable issues of fact.
- An expert opposing summary judgment must explain not just what was allegedly done wrong, but what should have been done differently and why the alternative was required by the standard of care.
- Expert opinions on causation must address the defense’s alternative causation theories; failing to do so is a critical omission that can be dispositive.
- Where the decedent had a pre-existing progressive fatal condition, plaintiff bears a heightened burden to demonstrate that the alleged malpractice, rather than the underlying disease process, caused the claimed injuries.
Why It Matters
This ruling provides a clear illustration of the level of specificity required from expert witnesses opposing summary judgment in medical malpractice cases. The First Department emphasized that experts cannot rely on conclusory statements or simply assert that the defendant’s treatment was inadequate; they must engage with the defense expert’s specific opinions and offer detailed, reasoned rebuttals. This decision will be particularly relevant to practitioners handling medical malpractice cases involving patient transfers, respiratory management, and cases where the patient had a pre-existing progressive condition. It reinforces the principle that expert opinions must be substantive, not merely contradictory, to survive summary judgment.