What problems would a patient have if they suffered an anastomotic leak from failed ileostomy reversal surgery & treatment was delayed for 1 week?

Ileostomy: The fact there is still an ileostomy. After the recovery period, there shouldn't be any long term affects in addition to what the initial surgery could have without the leak. If going for another ileostomy reversal, ask you doctor about near infrared imaging with administration of ICG. This MAY help determine adequate blood supply to the area being reconnected.