Final answer:
An appropriate response would be to explain that cancer pain often requires different treatment strategies from other types of pain and assure her of discussing the concerns with the doctor. The importance of medical supervision when using opioids for pain relief due to associated risks should also be highlighted.
Step-by-step explanation:
When addressing the concerns of a patient's wife regarding the increasing doses of analgesia, it is important to acknowledge her worries and provide information that helps her understand the treatment approach.
"Much cancer pain is caused by tumor involvement and needs to be treated in a way that brings the patient relief," is a suitable response because it directly answers her concern. It's essential to communicate that cancer pain can be very different from other types of pain like the one experienced from a previous back injury. Cancer often causes pain due to the tumor itself, which can lead to increased and different pain management strategies compared to non-cancer pain.
Furthermore, telling her that you will discuss the situation with the doctor can provide assurance that her husband's pain management is being taken seriously. It's also helpful to clarify that while opioids are powerful pain relievers and very effective, they need to be used under strict medical supervision due to risks like side effects and the potential for addiction.