11.1 Data Collection: Observing, Measuring, Recording & Routing Information
Key Takeaways
- Data Collection is a three-question subject area defined by the North Dakota handbook as data acquisition, handling, and routing — what you gather, how you record it, and where it goes.
- Objective data are measured or observed with your senses and are reproducible by another observer; subjective data are what the resident reports and cannot be verified directly, so they are recorded in the resident's own words inside quotation marks.
- Record measurements immediately after taking them; writing vital signs from memory at the end of the round is the most common source of documentation error, and North Dakota's skill test requires you to record on a form you signed before the test began.
- Correct a paper charting error by drawing a single line through it, writing the word "error" with your initials and the date, and entering the correct information — never erase, never scribble out, and never use correction fluid.
- Report before you chart: urgent findings go verbally to the licensed nurse immediately, and the documentation follows.
Data Collection: Observing, Measuring, Recording & Routing Information
North Dakota's handbook defines Data Collection in one sentence: "Questions relating to data acquisition, handling, and routing." Three questions on the knowledge exam turn on it, and its principles quietly govern half the skill test as well — two of the three mandatory first tasks require you to measure and record output on a signed form.
1. Acquisition: What Counts as Data
Objective versus subjective
| Objective data (signs) | Subjective data (symptoms) | |
|---|---|---|
| Definition | What you can see, hear, feel, smell, or measure | What the resident tells you they experience |
| Verifiable? | Yes — another observer would record the same thing | No — it cannot be measured or independently confirmed |
| Examples | Blood pressure 138/82; a 2 cm skin tear on the left heel; 150 mL of emesis; a red, swollen right ankle; the resident ate 25% of the tray | "My hip is throbbing." "I feel dizzy when I stand." "I'm nauseated." "I didn't sleep at all." |
| How to record | Numbers, measurements, and precise descriptions | The resident's own words, in quotation marks |
[!IMPORTANT] Never translate a resident's words into your interpretation. "Resident reports 'a crushing weight on my chest'" is data. "Resident appears to have indigestion" is a diagnosis you are not licensed to make, and it may send the nurse in the wrong direction entirely.
The senses you collect with
Data collection is not only numbers. A CNA gathers information by sight (skin color, gait, facial expression, the contents of a brief), hearing (breathing sounds, cough quality, tone of voice, a wet gurgly swallow), touch (skin temperature and moisture, edema that pits, muscle tension), and smell (a fruity breath odor, foul urine, wound odor). North Dakota's own definition of the Communication subject area explicitly includes anything related to hearing, seeing, feeling, tasting, or smelling.
The five things that make an observation useful
- Baseline. Compared with what? "Ate 25% of lunch" means one thing for a resident who always eats 25% and something else for a resident who always clears the tray.
- Onset and duration. When did it start? Is it constant or intermittent?
- Location and description. Which side, which joint, how big, what color.
- Severity. Use the facility's pain scale; quote the number the resident gives.
- Associated findings. What else changed at the same time?
2. Measurement: Accuracy Rules
| Measurement | Rules that protect accuracy |
|---|---|
| Weight | Same scale, same time of day, similar clothing, no shoes, bladder emptied first. Zero the scale before the resident steps on. |
| Vital signs | Rest the resident first; correct cuff size; count the pulse for 60 seconds and respirations for 60 seconds on the North Dakota skill test; count respirations without announcing it so the resident does not alter their breathing. |
| Intake | Convert to milliliters. 1 ounce = 30 mL. A 4 oz juice glass finished = 120 mL; a 6 oz cup half consumed = 90 mL. Count gelatin, ice cream, sherbet, popsicles, and soup. |
| Output | Measure in a graduate on a flat surface at eye level; read at the bottom of the meniscus. Estimate nothing you can measure. |
| Meal percentage | Record the percentage actually consumed, not the percentage you wish had been consumed. |
[!TIP] Record at the point of care, not from memory. The single most common documentation error is carrying four residents' vital signs in your head to the end of the hall. On the North Dakota skill test, the recording form is provided by the RN Test Observer and you sign it during the equipment and supplies demonstration before the test begins — your written measurements are then compared with the observer's own. In the facility, the same discipline applies for the same reason.
3. Handling: The Rules of Legal Documentation
The medical record is a legal document. Anything you write can appear in a state survey, a family complaint, or a courtroom years later.
+-----------------------------------------------------------------------------+
| CNA DOCUMENTATION GROUND RULES |
| |
| [TIMELY] ---> Chart AFTER care is given, never before. Charting |
| something you have not yet done is falsification. |
| [ACCURATE] ---> Facts and measurements only. No guesses, no opinions, |
| no labels like "uncooperative" or "difficult." |
| [COMPLETE] ---> Date, time, what you observed, what you did, what you |
| reported, to whom, and your signature and title. |
| [LEGIBLE] ---> Black ink on paper; print clearly. Illegible is |
| legally equivalent to undocumented. |
| [NO BLANKS] ---> Do not leave blank lines or spaces where someone else |
| could add an entry. |
| [YOUR OWN] ---> Chart only care YOU provided. Never chart for another |
| person, and never share your electronic password. |
+-----------------------------------------------------------------------------+
Correcting an error
On paper: draw one single line through the incorrect entry so the original remains readable, write "error" with your initials and the date, then write the correct information and sign. Never erase, never black out, never use correction fluid, and never write over an entry — all of them look like concealment.
+-----------------------------------------------------------------------------+
| INCORRECT: |
| [ BP 180/110 mmHg, pulse 120 bpm ------------------------- M. Larson, CNA] |
| |
| CORRECT: |
| [ BP 180/110 mmHg, pulse 120 bpm ] <- single line through, "error, |
| initials ML, date |
| BP 128/78 mmHg, pulse 72 bpm --------------------------- M. Larson, CNA |
+-----------------------------------------------------------------------------+
In an electronic record, use the system's built-in correction or addendum function. Never attempt to delete an entry, and never document under another user's login.
Confidentiality in handling
Resident information is protected health information. Do not discuss residents in hallways, elevators, the dining room, or the parking lot; do not leave flow sheets, assignment sheets, or screens visible to visitors; do not photograph residents; and never post anything about a resident on social media, even without a name. A recognizable photo, a room number, or a distinctive detail is an identifiable disclosure.
4. Routing: Where the Data Goes
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| THE ROUTE A CNA'S OBSERVATION TRAVELS |
| |
| [1] CNA observes / measures at the bedside |
| | |
| v |
| [2] URGENT? -> Report VERBALLY to the licensed nurse IMMEDIATELY, |
| stay with the resident, then document. |
| ROUTINE? -> Record on the flow sheet / ADL record at the point of |
| care, and report at end-of-shift handoff. |
| | |
| v |
| [3] Licensed nurse ASSESSES, decides, and notifies the provider, |
| family, or responsible party as needed |
| | |
| v |
| [4] Findings feed the CARE PLAN and the Minimum Data Set (MDS) |
| assessment completed by the RN |
| | |
| v |
| [5] Revised care plan comes back to the CNA as changed assignments |
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Two boundaries make this route legally sound. First, the CNA collects data; the licensed nurse assesses. Write and say "observed," "measured," "resident reports" — never "assessed." Second, route through your chain of command. A CNA reports to the charge nurse, not directly to the physician, and never gives a resident or family a clinical opinion about what the data mean.
[!WARNING] Never chart care that was not given, and never let anyone chart for you. Documenting a turn you did not perform or a meal percentage you did not observe is falsification of a medical record. In North Dakota it can support a finding of neglect against your registry listing, which under N.D. Admin. Code 33-43-01-01(28) results in permanent revocation.
Which entry is an example of objective data recorded correctly?
A CNA realizes she recorded a resident's blood pressure on the wrong line of a paper flow sheet. What is the correct way to fix it?
A resident tells the CNA, "I have a crushing weight on my chest." What should the CNA do?
A resident drank a full 8-ounce carton of milk, half of a 6-ounce cup of coffee, and a full 4-ounce cup of gelatin. What total intake should the CNA record?