All are criteria for SIRS except
**Core Concept**
The Systemic Inflammatory Response Syndrome (SIRS) is a clinical condition characterized by a systemic inflammatory response to an infectious or non-infectious insult. It is defined by specific criteria that include body temperature, heart rate, respiratory rate, and white blood cell count.
**Why the Correct Answer is Right**
Since the question is incomplete, let's discuss the general criteria for SIRS, which include a body temperature greater than 38°C or less than 36°C, a heart rate greater than 90 beats per minute, a respiratory rate greater than 20 breaths per minute or PaCO2 less than 32 mmHg, and a white blood cell count greater than 12,000 cells/mm^3 or less than 4,000 cells/mm^3.
**Why Each Wrong Option is Incorrect**
**Option A:** Without the specific details of option A, we cannot directly address why it is incorrect, but any option that does not align with the established criteria for SIRS would be considered incorrect.
**Option B:** Similarly, option B would be incorrect if it does not match one of the defined criteria for SIRS.
**Option C:** Option C's incorrectness would depend on its deviation from the recognized SIRS criteria.
**Option D:** Option D would be incorrect if it accurately represents one of the SIRS criteria, as the question asks for what is NOT a criterion.
**Clinical Pearl / High-Yield Fact**
A key point to remember is that SIRS can be triggered by both infectious and non-infectious causes, and its recognition is crucial for early intervention and management of potentially severe conditions like sepsis.
**Correct Answer:** Correct Answer: D. Age greater than 65 years.