I have not had surgery, but I did fly in January and we have similar measurements. I flew Delta, same size seats, a total of 5 flights. What I found was I was far more comfortable by the window because I could lean into the window area and didn't have to worry about people walking down the middle. I was able to put the arm rests down, but didn't, I was also sitting next to a close friend so we "cuddled" I was Impressed by the flight attendants, I never felt uncomfortable asking for seat belt extenders and they always handed them to me in a way that didn't draw attention. I had 3 short flights and 2 long (6hrs each) and made sure once I was settled I would only have to get out once, in the middle to pee. I never put my tray down, utilized my friends. I did do the aisle Once and hated it.