I certainly think you should Bernie, but agree with OnlyMe ... showing concern, etc.
The two complaints are not to be ignored I feel, and quite serious, unlike a complaint a patient made against my daughter 'cause her tea was less than hot before she had chance to get it to her ! Sometimes the patient's right to complain is abused too ...
Not in your case though.
The authorities will surely understand is not a personal complaint aimed at the nurses, but at the whole problem of shortages in nursing staff.