If subcutaneous emphysema is found during an incision assessment, what should the nurse initially mark?

When assessing subcutaneous emphysema, the initial focus should be on the periphery of the crackling sensation, as this is directly related to the areas affected by the air trapped under the skin. Marking the periphery helps to delineate the boundaries of the emphysema, which is crucial for ongoing assessment and documentation. This identification allows for monitoring of any changes in size and extent over time, which can indicate improvement or worsening of the condition.

In contrast, marking the entire incision area may not provide specific information regarding the extent of the subcutaneous emphysema. Focusing solely on the area with the most swelling might also overlook the critical relationship between the crackling sensation and the spread of air. Documenting the location of the drainage tube exit, while important in overall assessment, does not directly address the immediate concern of identifying and monitoring the subcutaneous emphysema itself.