Upon arriving at a motor vehicle crash, what should you direct your partner to do when finding a semiconscious patient?

When encountering a semiconscious patient at a motor vehicle crash, applying manual in-line support of the patient's head is crucial for maintaining spinal alignment and preventing further injury. This technique stabilizes the head and neck, which is essential in cases where there may be potential spinal injuries, a common concern in vehicle accidents. Stabilizing the head helps ensure that any movement during transport does not exacerbate a possible spinal cord injury, which could result in severe complications.

Gaining control of the patient's head and neck before any other interventions is a priority, especially considering the level of consciousness indicated by 'semiconscious.' This approach allows for safer management of the patient's airway and overall condition without risking additional harm.

While applying a cervical collar and administering oxygen are important steps in patient care, they should follow the establishment of manual in-line support. Removing the patient from the vehicle should also be performed with caution and ideally after ensuring the stability of the cervical spine. Hence, establishing manual support is a key first action in managing the situation.