How can I get a “clean catch” urine sample from my bedridden 89 yr old mom?

If your mother is aware that she needs to urinate, you can slip a very clean bed pan under her. Or, if it’s possible at all to get her onto a toilet and you have in home health care coming in, ask them to bring you a “hat”, which is a plastic shield that fits under the toilet seat across the bowl and comes with sanitary wipes and a jar for the sample. If these suggestions aren’t a solution, as for a Visiting Nurse to come in and do a catheterization. .