At 69yrs, acute episode of cholecystitis, should be managed on medications.(Gall bladder becomes swollen and inflamed.)
If he suffers from any heart related issues, do not think about surgery.
The pain can occur again because of stone and inflammation.
If the surgeon you are admitted under says to proceed for surgery, ask him if you can wait for 3-4 weeks.(inflammation subsides during this period)
If symptoms continue, then get operated.(Laparoscopically)
The 13.4 mm stone cannot be removed solely, Gall bladder has to be removed.
Next Steps
Manage acute episode on medicines. If symptoms occur after 3-4 weeks, go for surgery.
Health Tips
Risks of surgery to be discussed with surgeon and anaesthetist.