Final answer:
The time is 10:30 PM.
Step-by-step explanation:
The patient vomited 200ml at 2230. To determine the time, we need to convert the 24-hour format to a 12-hour format. Since 2230 is in the evening, the time would be in the PM. To convert 2230 to 12-hour format, subtract 12 from the hour: 2230 - 1200 = 1030. Therefore, the time is 10:30 PM.