Quantifying conditional duration of values in excel - excel

Question

I am trying to analyze blood pressure that is taken every minute, and determine how long the values are within a certain range, consecutively. I have the data set up in excel for the moment. I have color coded the values based on the ranges I would like to quantify. I know that if I do a simple "=countIF) function I can get the total number of times these values meet the criteria. But what I want to do next is quantify for how long the values fall within a specified range, consecutively.
This shows values in columns in excel, where each column is a different patient, and the heat map are the value conditions to help me visualize if certain thresholds occur for longer times than others. But I want to find a way to quanitify this in excel, if possible. Any help would be much appreciated.
The final result I am looking for is to be able to measure how much time each patient sustains a specific category of blood pressure to know if certain ranges are more prolonged than others (e.g. blood pressure is between 120-130 for 30 minutes). So in the spreadsheet above, assuming each cell is a 1-minute bin, for column HU, BP is between 120-130 for 3 minutes (rows 2-4), and again for 16 minutes (rows 6-22). In column HS, blood pressure is above 140 (black) for 7 minutes.
I want to find a workflow to quantify these durations so that I can get a summary of the number of consecutive 1-minute bins (each cell) at a specified range/threshold for each patient (column)

Answer 1

First, I would create another sheet -- let's call it "Thresholds" -- with thresholds of bloodpressures in ascending order in column A.
Put a category number next to each value (in column B)
For example:
0 0
90 1
100 2
105 3
110 4
115 5
120 6
125 7
... etc.
Back in the other sheet, add a new column next to each bloodpressure column. So you
would have a new column HR next to HQ.
Put there a formula that looks up the category for the value in HQ, from sheet "Thresholds".
You can use VLOOKUP for that. For example in row 2:
=VLOOKUP(HQ2, Thresholds!$A$1:$B:$1000, 2)
Then add yet another column, HS it will be.
In there make a running count for same category rows, like this (for row 2, I assume you have used row 1 for column titles):
=IF(HR1<>HR2, 1, HS1+1)
Drag down this formula to the column. This formula checks if this row has a different category of blood pressure than the previous one. If so, it
sets the counter to 1 (it is the first instance in this running series). In the other
case it takes the value of the counter in the previous row and adds 1 to it.
Repeat this for the other columns (inserting 2 new columns next to each).
This will already give you a start for further analysis.