At my facility we, historically, have gotten a foley cathater and put it in the residual opening (sterily), inflated the balloon, checked for gastric content return and plugged/clamped it. (Note: under no circumstances would anything be put into this tube until placement was verified by radiology.) The idea is/was that it would maintain the opening until another tube could be place by floroscopy without the patient having to under the whole procedure from top to bottom again.
Recently there as been some debate on my unit as to the propriety of this historical practice. Our hospital doesn't have a policy/procedure to cover our butt etc. We may look into writing a policy etc. but I was wondering what other facilities/units do if a patient looses their tube.