Serial one-to-many tables

[CuriousMark]

I need help with design of a database I am writing to keep track of
procedures that I do on patients. For each patient, one or more procedures
can be done. For each procedure, one or more locations can be sampled (I want
to keep track of the sequence of locations sampled, i.e. 1, loc2R; 2, loc2L;
3, loc7; etc). For each location, one or more samples (pass1, pass2, pass3,
etc.) can be taken. For each sample there is a result (pos, neg,
non-diagnostic).

I've come up with this series of tables:

tblNames
NameID
LastName
FirstName

tblProcedure
ProcedureID
NameID
ProcedureDate
ProcedureType

tblLocation
LocationID
ProcedureID
LocationSequence
LocationName

tblResult
ResultID
LocationID
PassNumber
PassResult

I keep getting lost trying to create a form or sequence of forms that will
enable me to enter all the data. It seems that I need a subform
(Location:Result) inside a subform (Procedure:Location) inside another
subform (Namerocedure). On the highest level form (Name) I want to be able
to select from the existing names (shown as LastName & ", " & FirstName) or
enter a new name. Any help with fixing my database design would be much
appreciated. Thanks.

 

[tina]

well, you're on the right track. i'd add a few supporting tables, and
rearrange a couple of the others a bit, as

tblPatients
PatientID (primary key)
LastName
FirstName
<okay so far, except note that i changed the table name and primary key
fieldname, to be more descriptive. keep in mind that Access is not a secure
repository for sensitive data such as social security numbers; if you need
to keep that sort of data, you should look at using a server-based solution
such as SQLServer. also, your use of the word patients indicates human
medical data. if that's correct, and if you're in the USA, your data
storage/handling solution needs to be HIIPA-compliant; again, data security
is an issue here.>

tblProcedures
ProcedureID (pk)
ProcedureName
<this would be a list of all procedures that you can perform, and nothing
else. do NOT include any fields that indicate a specific person or a
specific performance of a procedure.>

tblLocations
LocationID (pk)
LocationName
<this would be a list of all locations where an instance of a procedure may
be performed, and nothing else.>

tblSamples
SampleID (pk)
SampleDescription
<this would be a list of all possible sample descriptions - or names, if
that makes more sense to you - such as pass1, pass2, pass3, etc. and nothing
else.>

tblResults
ResultID (pk)
ResultDescription
<this would be a list of all possible result descriptions - or names - such
as pos, neg, non-diagnostic, etc. and nothing else.>

tblPatientProcedures
PatProcID (pk)
PatientID (foreign key from tblPatients)
ProcedureID (fk from tblProcedures)
ProcedureDate

the table relationships are:
tblPatients.PatientID 1:n tblPatientProcedures.PatientID
tblProcedures.ProcedureID 1:n tblPatientProcedures.ProcedureID
<make sure you set the relationships in the Relationships window, and
enforce referential integrity.>

tblPatProcLocations
ProcLocID (pk)
PatProcID (fk from tblPatientProcedures)
LocationID (fk from tblLocations)
Sequence

the relationship is:
tblPatientProcedures.PatProcID 1:n tblPatProcLocations.PatProcID
tblLocations.LocationID 1:n tblPatProcLocations.LocationID
<ditto above re setting relationships.>

tblLocSamples
LocSamID (pk)
ProcLocID (fk from tblPatProcLocations)
SampleID (fk from tblSamples)
ResultID (fk from tblResults)

the relationships would be:
tblPatProcLocations.ProcLocID 1:n tblLocSamples.ProcLocID
tblSamples.SampleID 1:n tblLocSamples.SampleID
tblResults.ResultID 1:n tblLocSamples.ResultID

exactly how you set up your data entry form is determined partly by the work
flow, partly by the media that you'll be entering data from (i'm assuming a
sheet of paper with data organized in a particular order), and partly on
your skill level. the work flow you indicated below; and your skill level
can be increased to meet your development needs - trust me, it can the
source media we can't see, so you'll have to use your best judgment on
making the form suit your needs there.

i might start with a mainform, bound to tblPatients. probably an unbound
combobox control in the form's Header section, RowSource: tblPatients, to
select a particular patient record. perhaps a tab control, with the patient
fields on the first page.

then a subform on the second page of the tab control, bound to
tblPatientProcedures, SingleForm view, with a combobox control bound to
field ProcedureID, RowSource: tblProcedures, to pick a procedure when adding
a new record and display the procedure name of existing records.

then a 2nd level subform, bound to tblPatProcLocations, with a combobox
control bound to LocationID, RowSource: tblLocations, again to pick or
display a location. if i were using A2000 - A2003, i'd set the DefaultView
of the level2 subform to Datasheet. then i'd add a level3 subform, bound to
tblLocSamples, DefaultView also as Datasheet, with a combobox control bound
to SampleID, RowSource: tblSamples, and another combobox bound to ResultID,
RowSource: tblResults. (if you're using A2007, i don't know what options may
be available; if you're using A97, a different method is needed - but let's
not go there unless we have to.)

so you open the form, add a patient record or find an existing one in the
combobox in the form Header. click on the 2nd tab, and add or go to a
procedure record (you can use an combobox here, too - or a listbox - to find
a specific procedure record for the selected patient). then enter or go to a
location record in the datasheet, and enter or edit sample records in the
subdatasheet of each location record.

hth

 

[Steve]

TblPatient
PatientID
FirstName
LastName

TblProcedure
ProcedureID
Procedure

TblLocation
LocationID
Location

TblPatientProcedure
PatientProcedureID
PatientID
ProcedureID

TblPatientProcedureLocation
PatientProcedureLocationID
PatientProcedureID
LocationID

TblSampleResultID
SampleResultID
SampleResult (Pos, Neg, Non-Diagnostic)

TblPatientProcedureLocationSample
PatientProcedureLocationSampleID
PatientProcedureLocationID
SampleName
SampleResultID


Steve

 

[CuriousMark]

Wow. Thanks very much tina. I'll have to print this out and work through it a
bit. I'm not exactly a novice at Access, but not experienced enough to
understand your answer on the first read . Thanks also for the advice on
HIPAA compliance. It is an issue and has been taken into account on several
levels.

 

[CuriousMark]

Thanks Steve. Very similar to tina's suggestions, which is reassuring. As I
said in response to tina, I'll have to print these answers out and think
about how to put this all together. I appreciate the help.

 

[tina]

HIPAA compliance.

oops! i can't believe i screwed that up (i've taken classes that include
HIPAA information) and of course my acronym was *wrong*!! < smacks self
upside the head >

as for the table design and suggested form/subforms setup, yeah, it's a lot
to take in. if the structure has you a bit stumped, a refresher on
relational design principles will probably clear it up, see
http://www.accessmvp.com/JConrad/accessjunkie/resources.html#DatabaseDesign101
for links to resources.

if it's the form/subform setup that's hard to visualize, let me know what
version of Access you're working with; maybe i can whip up a demo db for
you.

hth

 

[Roger Carlson]

On my website (www.rogersaccesslibrary.com), is a small Access database
sample called "SubForm3Levels.mdb" which illustrates how to do this. You
can find it here:
http://www.rogersaccesslibrary.com/forum/forum_posts.asp?TID=263

Interestingly, I used a medical paradigm for this sample too.
Visits ---> Procedures ---> Complications ---> Interventions
--
--Roger Carlson
MS Access MVP
Access Database Samples: www.rogersaccesslibrary.com
Want answers to your Access questions in your Email?
Free subscription:
http://peach.ease.lsoft.com/scripts/wa.exe?SUBED1=ACCESS-L

 

[CuriousMark]

Thanks Roger. I will check it out.

On my website (www.rogersaccesslibrary.com), is a small Access database
sample called "SubForm3Levels.mdb" which illustrates how to do this. You
can find it here:
http://www.rogersaccesslibrary.com/forum/forum_posts.asp?TID=263

Interestingly, I used a medical paradigm for this sample too.
Visits ---> Procedures ---> Complications ---> Interventions
--
--Roger Carlson
MS Access MVP
Access Database Samples: www.rogersaccesslibrary.com
Want answers to your Access questions in your Email?
Free subscription:
http://peach.ease.lsoft.com/scripts/wa.exe?SUBED1=ACCESS-L