Georgeann,
I had cryo back in 2006. During the past year my psa has climbed, doubling to 1.5 in six months. However, I just had a follow-up biopsy that confirmed there was no prostate cancer in what was left of my gland plus the seminal vesicles. Had there been any signs of cancer, I would have been able to get another cryo or radiation.
First things first, your husband's weakness is likely attributable to the bladder infection and possibly some depression due to having the catheter for three or so weeks. The cryo itself, should not have any bearing on one's strength.
Next....do not assume that the cryo failed. If done right, it kills the monster very well. As to psa readings....the lower the better; however the reason why your doc said less than 1.0 is because there is always the possibility that some prostate tissue may still be alive---however, the higher the psa reading, the higher the potential that both healthy AND cancerous tissue is still alive. Studies have suggested that a nadir of 0.5 or less is indicative that there is a good chance the cancer in the prostate has been eliminated. My nadir was 0.2; many men go lower than that. As to failure...your doc uses 1.0; my doc uses 2.0 + nadir (in my case 2.2); I have thrown the towel in at 1.5, mostly because the doubling time is now looking to be rapid. Anyway, if the initial reading is less than 1.0, your doc will not recommend doing anything now; that will be determined after subsequent readings, showing doubling time, etc. If the initial reading is over 1.0, I believe your doc will want to do further testing and possibly another cryo or radiation, if cancer is still found in the prostate or seminal vessicles. BTW: your doc will do another biopsy ANYWAY (six months after), no matter what the initial psa is. That is to ensure, to the degree possible, that all of the cancer was killed, regardless of the psa reading.
Hope this helps!