Final answer:
A participant with arthritis can potentially continue a CPR course and receive certification if their modified hand position still achieves effective chest compressions without increasing risk to the victim, as the end result of maintaining blood flow is what's critical for certification.
Step-by-step explanation:
If a participant who has arthritis in their hands performs chest compressions by grasping the wrist of the hand positioned on the chest with their other hand, instead of placing one hand on top of the other and interlacing the fingers, the outcome is the key point to consider. While modifications to the CPR technique might be necessary due to the participant's arthritis, the most critical factor in CPR certification is the ability to effectively maintain blood flow. As long as the modified method achieves >the compression depth and rate required to do so, and does not pose additional risks to the victim, the individual could be permitted to continue the course and receive certification. It is essential to remember that proper training and technique in CPR are crucial to minimize potential injuries to both the patient and the person performing CPR.