12.1 Disease Process Overview

12.1 Disease Process Overview

Most residents in an Ohio skilled-nursing facility live with one or more chronic diseases — conditions that last months or years and are managed, not cured. As a State Tested Nurse Aide (STNA), you spend more time with these residents than any nurse does, so you are the early-warning system. The exam tests whether you can recognize a worsening condition and take the right first step.

The conditions you must know

How each condition develops

A short mental picture of each disease helps you predict the signs you will see. In congestive heart failure the weakened heart cannot keep blood moving, so fluid pools — first in the legs and lungs — which is why edema, sudden weight gain, and breathlessness when lying flat go together. In COPD the airways and air sacs are damaged, so stale air gets trapped and the resident must work hard to push it out, producing pursed-lip breathing and a barrel-shaped chest. In diabetes the body cannot move sugar from the blood into cells properly, so sugar runs too high or, after medication, too low.

A stroke starves part of the brain of blood, knocking out whatever that area controlled — often the face, an arm, or speech on one side. A pressure injury starts when steady pressure squeezes blood out of skin over a bone. And a DVT is a clot that forms when blood sits still in a leg vein, common after long bed rest or surgery.

Your scope: observe, report, assist

The single most important rule in this domain is your scope of practice. An STNA observes, reports, and assists. You do not diagnose, do not perform a sterile or invasive procedure, and do not decide to start or stop a treatment. When a resident shows a new or worsening sign, your job is to report it to the licensed nurse and document what you actually saw — not what you think it means.

• ✅ You CAN: measure vital signs, weigh residents, reposition, encourage fluids per care plan, report changes.
• ❌ You CANNOT: assess a wound's stage, interpret labs, give medications, judge whether a clot is dangerous.

Worked example

A resident with CHF gained four pounds since yesterday's weight and her ankles look puffier. The tempting wrong answer is "restrict her fluids." That is a nursing or medical decision. The correct STNA action is to report the weight gain and swelling to the nurse immediately, because a sudden gain often means fluid is building up and the care team may need to adjust treatment. You record the exact weight and your observation; the nurse decides what happens next.

Why chronic disease matters in long-term care

Chronic conditions rarely travel alone. A typical Ohio nursing-home resident may have CHF, diabetes, and limited mobility all at once, and each condition raises the risk of the others. Reduced mobility from a stroke makes pressure injuries and DVT more likely; diabetes slows wound healing and damages circulation; CHF and COPD both reduce the oxygen reaching tissues. This is why your daily observations — skin, breathing, appetite, energy, swelling, mental status — are so valuable. A small change you notice and report early can prevent a hospital transfer later.

The vocabulary the exam expects

You do not need to diagnose, but you must understand the words a nurse uses so you can report accurately and follow directions. A few that appear often:

• Edema — swelling from fluid, commonly in ankles and feet (a CHF sign).
• Dyspnea — difficulty breathing or shortness of breath.
• Cyanosis — bluish color of lips, nail beds, or skin from low oxygen.
• Blanchable vs. non-blanchable — whether reddened skin turns white when pressed; non-blanchable is the danger sign.
• Acute vs. chronic — acute means sudden and new; chronic means long-standing.

When you report to the nurse, plain accurate description always beats medical jargon you are unsure of. "His lips look bluish and he is breathing fast" is a perfect report.

How this appears on the exam

The Ohio written test has 79 multiple-choice questions and you have 90 minutes; passing is 70% or higher. Disease-process items rarely ask for a textbook definition. Instead they describe a resident and a symptom and ask, "What should the nurse aide do first?" The safest answer is almost always to report the observation, protect the resident from harm, and stay within your role.

Watch for distractors that have you acting like a nurse — giving medicine, restricting fluids, or deciding a symptom is "nothing to worry about." When you see two answers that both seem reasonable, choose the one that reports a change to the nurse and keeps the resident safe; that combination is almost never wrong on this exam.