I have been working on same database but in different field, What you need to do is create table Patient Information with primary key PatientID, and table Surgery Information with primary key SurgeryID.
Then you add the PatientID as foreign key in the Surgery Table with the same data type which in this case should be Number. When you connect [Patient Information].PatientID with [Surgery Information].PatientID you are creating a one-to-many relationship.
Now on the Form, you can create a form which includes PatientID, PatientName, PatientAddress, etc... from table Patient Information, and add a subform which represents the Surgery Information Table.
In this case, when you enter a patient record, in the subform you can add as many surgeries as you want.
Check my database example below:
Mine look like this because I changed the properties of the subform for let's say Table.[Surgery Information]
Link Master Fields PatientID
Link Child Fields PatientID
Hope this works as you want.
Regards