Res ipsa loquitur · Decision
Cruz v. Agas: a complication does not establish probable cause
The Court required a demonstrated connection between the procedure and the alleged negligent injury.
A serosal tear and bleeding after colonoscopy did not, without medical proof of the mechanism and accepted technique, establish that the physician had been negligent. A complication alone is not proof of a breach of care.
Facts and context
After Dr. Agas performed gastroscopy and colonoscopy, the patient developed abdominal pain and deterioration that led to emergency surgery. A serosal tear and bleeding were identified. The patient filed a criminal complaint for reckless imprudence, asserting that the complication itself and the need for surgery demonstrated negligent performance of the endoscopic procedures.
The prosecutor dismissed the complaint, and the reviewing authorities found no probable cause. The patient invoked res ipsa loquitur but did not present qualified medical proof explaining the accepted technique, how the tear had occurred, or why the complication ordinarily would not happen without negligence.
Issue
At the probable-cause stage, did the complication and subsequent emergency operation sufficiently show a negligent act and causal connection, or were those disputed technical questions that required competent medical evidence?
Ruling and doctrine
The Court sustained dismissal of the criminal complaint. A serosal tear and bleeding after endoscopy could not, without medical evidence about mechanism and accepted technique, be treated as self-evident proof of reckless imprudence. The circumstances did not establish the foundations for res ipsa loquitur, and the adverse sequence alone did not identify a culpable act.
The ruling reviewed probable cause in a criminal complaint. It did not adjudicate a civil damages claim or declare that the procedure can never be negligently performed.
Practice implications
Parao Law practice guidance
For physicians
- Explain material procedural risks before treatment and document the actual discussion.
- After deterioration, record the observations, reassessment, escalation, and subsequent care.
- Distinguish a recognized risk from your assessment of whether the procedure and response were competently performed.
- Preserve relevant records and avoid describing an uncertain mechanism as proven simply because it would explain the outcome.
For lawyers
- Identify the procedural stage and applicable review standard before framing the argument.
- Collect the procedure record, consent documentation, subsequent surgery findings, and relevant expert evidence.
- Specify the departure from accepted practice and its causal connection; a complication alone does not establish either.
- If relying on res ipsa, explain the common-knowledge foundation and control rather than treating the doctrine as a substitute for all technical proof.
Limits of the ruling
The case does not say that a known complication can never result from negligent performance. It sustained the dismissal under the record and review before the Court. The procedural setting and the lack of the required evidentiary connection are part of the result.
Official sources
Read the full decision ↗For general information. The full decision and later developments should be considered when applying a ruling to a particular matter.