Your patient is pre-operative for an elective surgery. You notice a pulsating mass in the mid abdomen. What is your next action?

The next action in this scenario should be to order an abdominal ultrasound. This non-invasive imaging technique is particularly useful for evaluating abdominal masses, as it can help assess the nature of the mass (whether it's solid or cystic), its size, and its relation to surrounding structures. Ultrasound is often the first-line imaging modality used in pre-operative assessments for abdominal concerns due to its safety profile and ability to quickly provide critical information regarding vascular structures and potential organ involvement.

In this case, the presence of a pulsating mass suggests a potential vascular abnormality, such as an aneurysm, which requires immediate evaluation. Ultrasound can help clarify the diagnosis without the need for the patient to undergo more invasive procedures initially.

The option of ordering an abdominal CT, while it can provide detailed images and more information, typically involves exposure to radiation, which is a consideration for a patient gearing up for surgery and may not be as urgent as obtaining quick diagnostic information through ultrasound. Likewise, simply documenting the mass and sending the patient to surgery without further investigation could lead to complications if the mass requires additional evaluation. Cancelling surgery solely based on the observation of a pulsating mass without further assessment may not be warranted without a clear understanding of the mass's nature and implications. Thus