When abandonment of patient of a CNA in a surgery center in CA

[Sonny]

I'm a Certified Nursing Assistant in CA seeking advice.I'm working 4 days 10 hour shift.My shift ends 6pm,6:30pm(2) & 7pm.We have overnight nurses coming @ 6pm with night differential.Questions being ask are the following:

1. Can we leave @ 5:53pm;6:23pm & 6:53pm even without telling the overnight nurses on floor because the machine accepts clock- out 5:53pm when your shift ends @ 6pm;6:23pm when shift ends 6:30pm & 6:53pm when shift ends 7pm?There are (2) overnight nurses coming @ 6pm and there's still patient of 1-3.Our surgery center volume range most of the time 69-90 cases a day.Can this be considered abandonment of patient?

2. Usually (1) CNA leaving @ 7pm for this 10 hour shift.Can the overnight nurses(2) hold the CNA to stay if they have 1-3 patients left?What if the CNA refuse,is this will be considered an abandonment?If they will hold the CNA to stay,for how long?

3. What if the late person leaving @ 7pm scheduled for the day get off early because of some emergency or call-in sick for the day and there are (2) CNAs  scheduled for the day leaving @ 6:30pm,can the overnight nurses(2) coming @ 6pm can hold (1) of the CNAs who are supposed to be leaving @ 6:30pm?Overnight nurses(2) has 1-3 patients left.

4. Can our manager change our shift which are:8am-6:30pm(2);8:30am-7pm(1);7:30am-6pm(1) in order to help the overnight nurses(2) coming @ 6pm?