How prevalent are clotting disorders and how do they affect candidacy for hair transplants?

I had a failed FUE transplant. Only one temple accepted the grafts and density 18 mo. post-op was less than we both expected. During the procedure the surgeon indicated bleeding was not excessive but was not responding to the clotting medication. Post-op we discussed this could be a factor in the failure. I have never been diagnosed with a clotting disorder and had no issues post-op. That said, how readily can this affect success and is success achievable if a bleeding disorder is present?