Final answer:
The most beneficial pressure-relief technique for a client with quadriplegia from a C7 spinal cord injury to avoid pressure sores while in a wheelchair is to instruct the client to lean forward and shift weight forward bilaterally over the feet.
Step-by-step explanation:
The most beneficial pressure-relief technique for a client with quadriplegia from a C7 spinal cord injury to avoid pressure sores while in a wheelchair is to instruct the client to lean forward and shift weight forward bilaterally over the feet. This technique helps to redistribute pressure and decrease the risk of developing pressure sores. Using a special wheelchair cushion can also be helpful in providing additional support and reducing pressure points. It is important for the client to regularly shift their weight and take breaks from sitting in the wheelchair to reduce the risk of pressure sores.