Medical Terminology, Technical Reading, and Documentation

Why Medical Terminology, Documents, and Documentation Matter

As a nursing assistant, you will read care plans, follow assignment sheets, handle Safety Data Sheets, and write notes that become part of a legal health record. A misread abbreviation or a vague, subjective charted statement can delay care or cause patient harm. Accuracy in language is a direct patient-safety skill.

Decoding Medical Terms with Word Parts

Most medical terms are built from three building blocks:

• Root – the core meaning (e.g., cardi = heart, derm = skin, hepat = liver)
• Prefix – placed before the root to modify meaning (e.g., brady- = slow, hyper- = above/excess, peri- = around)
• Suffix – placed after the root to indicate condition, procedure, or specialty (e.g., -itis = inflammation, -ectomy = surgical removal, -ology = study of)

When you meet an unfamiliar word, break it apart from left to right: identify any prefix, then the root, then the suffix. Combine the meanings to form a working definition, then verify in a current medical dictionary.

Example: Tachycardia → tachy- (fast) + cardi (heart) + -ia (condition) = condition of a fast heart rate.

Example: Dermatitis → dermat (skin) + -itis (inflammation) = inflammation of the skin.

Combining vowels (usually o) are inserted between word parts to make pronunciation easier; they carry no meaning of their own (cardiovascular = cardi/o + vascular).

Reading Standard Healthcare Documents

Care Plans

A care plan is the written guide that describes each resident's or patient's individualized goals, problems, and interventions. As a CNA you do not write care plans, but you must read and follow them. Key skills:

• Locate the resident's name, date, and care plan revision date before acting.
• Follow each listed intervention exactly; do not substitute a different approach without reporting to the nurse.
• Note any documented allergies, precautions (fall risk, aspiration risk, isolation), and preferred communication methods.
• If an entry is unclear, ask the supervising nurse before proceeding — never guess.

Assignment Sheets

An assignment sheet (also called a resident assignment or task list) tells you which residents or patients you are responsible for during a shift and what tasks are expected. Read it at the start of every shift. Flag any resident you are unfamiliar with and ask for a verbal handoff.

Safety Data Sheets (SDS)

The SDS (formerly called MSDS) is a standardized document required by OSHA for every hazardous chemical used in the facility — cleaning agents, disinfectants, and more. Each SDS contains 16 sections. The sections most critical to your daily work include:

• Section 2: Hazard identification (what can go wrong)
• Section 4: First-aid measures (what to do if exposure occurs)
• Section 8: Exposure controls / personal protective equipment (PPE) required

Always locate the SDS for any chemical before you use it for the first time, and follow PPE instructions exactly. If a spill or exposure occurs, refer to the SDS and notify your supervisor immediately.

Approved Abbreviations

Facilities maintain a list of approved abbreviations. Using non-approved abbreviations in documentation is a patient-safety error — The Joint Commission and other bodies have published "Do Not Use" abbreviation lists specifically because look-alike shortcuts have caused medication and care errors. Common approved abbreviations you will encounter include:

| Abbreviation | Meaning |

|---|---|

| ADL | Activities of daily living |

| BM | Bowel movement |

| C/O | Complains of |

| I&O | Intake and output |

| NPO | Nothing by mouth |

| PRN | As needed |

| SOB | Shortness of breath |

| VS | Vital signs |

| WNL | Within normal limits |

When in doubt, write out the full term rather than risk a misread abbreviation.

Objective vs. Subjective Documentation

Everything you chart as a CNA must be objective — based on directly observed, measurable facts — or must be clearly attributed as a patient quote.

• Objective: "Resident's right lower leg noted with 3 cm reddened area; skin intact; reported to charge nurse at 0730."
• Subjective (not acceptable as a stand-alone entry): "Resident's leg looks bad today."

If a patient makes a statement, document it in quotation marks: Patient stated, "My stomach hurts."

Documentation Safety Rules

• Never document care before it is given.
• Never leave blank lines in a paper chart; draw a single line through unused space and initial.
• If you make an error in a paper chart, draw one line through it, write "error," add your initials and the date — never erase or use correction fluid.
• Use only black or blue ink as required by your facility's policy.
• Date and time every entry.
• Sign every entry with your full name and credential (e.g., J. Smith, CNA).

Putting It Together: Scope of Practice Reminder

You interpret and follow documents; you do not alter care plans or medical orders. If you find an error or an entry that seems unsafe, report it to the supervising nurse. Documentation is a legal record — accurate, timely, objective entries protect residents, protect you, and support the care team.