Final answer:
The EMT should gain information about the size and type of the knife first when assessing a patient who has been stabbed.
Step-by-step explanation:
When assessing a patient who has been stabbed, the EMT should gain information about the size and type of the knife first. This information is crucial for assessing the severity and potential injuries caused by the stabbing. It can help determine the appropriate treatment and intervention needed, such as whether the patient may require surgery or specialist care.
The owner of the knife and the make and model of the knife are not as important in the initial assessment and treatment of a stabbing victim. The angle at which the knife entered the patient may provide valuable information about the mechanism of injury and potential internal injuries, but it can be assessed after obtaining information about the knife size and type.