Making sense of a blood test before your appointment
Not what the numbers mean. How to have them in order, so the conversation can be about you.
Why it is worth doing
A blood test report is a page of names, numbers and ranges, and it usually arrives a day or two before a fifteen-minute appointment. Most of us glance at it, notice anything marked with an arrow or an asterisk, and then carry a vague worry into the room.
The point of looking at it beforehand is not to work out what it means. That is what the appointment is for. The point is to arrive with the page understood as a page: what was tested, what is new, what has moved, and what you want to ask.
Get the report itself
Ask for a copy of the actual report, not a summary over the phone. In most places you are entitled to it, and more and more labs will send it to you directly or through a patient portal.
Keep every report you get. The first one tells you very little on its own; the third one, beside the first two, tells you a lot.
Read the three columns
Nearly every report has the same shape, whatever the lab.
- The marker: the name of what was tested. You do not need to know what each one is; you need to know which ones are on this report and which were on the last.
- Your value, with its unit. Write the unit down too. The same marker can be reported in different units by different labs, and a number without its unit cannot be compared later.
- The reference range printed beside it. This is the lab’s own range for this test, and it differs from lab to lab. Note the range from your report, not one from the internet.
Anything flagged on the report, with an arrow, a letter or a colour, is simply outside the printed range. Mark those for your question list. Do not try to decide what they mean.
Line it up against last time
If you have an earlier report, put the two side by side and write down three things: markers that are on one report but not the other, values that are flagged now but were not before, and anything that has moved noticeably even though it is still inside the range.
Dates matter. Write when each test was taken, and anything that was different around that time: a new medication, an illness, a change in how you were eating or sleeping. The person reading your results will ask.
Write your questions, then stop
Three questions, most important first. The flagged items usually make the first one. A good shape is “This was flagged; what, if anything, should I do about it?” rather than a theory of your own.
Then stop reading. Searching each marker the night before an appointment produces fear, not understanding, and the answers you find are written for everyone, which means for no one in particular.
Take it in, and take it away
- The report, or your own record of it, with the dates.
- The earlier report, if there is one.
- Your medication and supplement list.
- Your three questions, and something to write with.
- Afterwards, note what was said about each flagged item, the same day. Next time, that note is the first thing you will want.
How Sanomi does this
Sanomi keeps your results as a record that is read in your context, not against a page written for everyone.
- Enter the results from your report, with the value, the unit and the range printed beside it. Your own range comes first; if your lab prints a different one, Sanomi uses yours.
- Kept for good. Every result is dated and stays. The next report goes beside the last, and what has moved is plain to see.
- Read as yours. Your conditions and goals sit on the same record, so a result is never looked at on its own.
- A report on your lab values, written from your own record. When you want more than a glance, Sanomi uses AI to write a full piece about your results, in plain words and in sections, kept in your library.
- A preparation for this visit. Say why you are going and Sanomi helps you get ready: what to bring, how to describe what you have noticed, questions to ask. Out as a PDF, in a tap.
- For the people you look after too. A parent’s results live on their own profile, kept apart from yours.
Questions users ask
A result is flagged. Should I be worried?
A flag means the value is outside the range the lab printed. It is a reason for a question, not a conclusion. Put it first on your list and ask.
The range on my report is different from one I found online. Which is right?
The one on your report. Labs use different methods and print the range that fits theirs. Keep that one with the result.
How far back should I keep reports?
All of them. A single report says little; a series says a great deal, and the oldest one is often the most useful comparison.
Does Sanomi tell me what my results mean?
It keeps them in order, shows what has moved for you, and can write a report about your results from your own record, so you walk in with the page understood. It does not diagnose medical conditions and it does not give medical advice. What a result means for you is the conversation you are having at the appointment.
Last reviewed: October 2026. More on this: Your health record · Specific to you · AI Insight Reports.
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