11.3 Disease Process & Warning Signs
Key Takeaways
- Disease Process is about 4 of 75 Wisconsin Headmaster knowledge questions (~5.3%); focus on observation, reporting, and care adaptations — not diagnosing or prescribing.
- Know high-yield warning signs for diabetes, heart failure, COPD, stroke (CVA), hypertension crises symptoms, arthritis pain/limits, and pressure injuries.
- Sudden one-sided weakness, facial droop, speech trouble, chest pain, severe dyspnea, and unresponsiveness require immediate nurse notification (or emergency response per facility).
- CNAs collect objective data, compare to baseline, and report; treatment decisions belong to licensed nurses and providers.
Disease Process on the Wisconsin Knowledge Exam
Disease Process is about 4 of 75 Headmaster Wisconsin questions (~5.3%). The test is not a medical-school pathology final. It checks whether a nurse aide can:
- Recognize common conditions seen in long-term and residential care
- Know warning signs that need nurse report — sometimes immediately
- Provide supportive care within CNA scope (positioning, ADLs, comfort, safety)
- Avoid diagnosing, explaining lab results as a provider, or changing treatments independently
Your mantra: observe → report → follow the care plan. You are the eyes and ears at the bedside.
The CNA Role: Observe and Report, Do Not Diagnose
| CNA does | CNA does not |
|---|---|
| Measure vitals as assigned and record accurately | Interpret ECG or order labs |
| Report "blood sugar reading 52 on facility meter; resident sweaty and shaky" | Say "I diagnosed hypoglycemia and gave orange juice against NPO orders" without nurse direction |
| Describe "left side of face drooping; speech slurred starting at 0900" | Chart "resident had a stroke" as your medical conclusion without nurse/provider determination |
| Follow diet, fluid, O2, and activity orders already on the plan | Start, stop, or adjust oxygen flow or medications |
| Support ADLs adapted to arthritis, COPD fatigue, or weakness | Perform sterile procedures or assessments reserved for licensed staff |
When stems ask "what should the CNA do first?" with acute warning signs, the answer is almost always notify the nurse immediately (and stay with the resident / call for help per training), not "google the diagnosis" or "wait until the end of shift."
Diabetes Mellitus: High-Yield CNA Points
Diabetes affects how the body uses glucose. Residents may be on special diets, scheduled glucose checks (by trained staff per policy), insulin or oral meds (nurse-administered), and foot-care precautions.
Warning Signs to Report
| Concern | Possible clues |
|---|---|
| Low blood sugar (hypoglycemia) | Shakiness, sweating, confusion, irritability, dizziness, hunger, weakness, cool clammy skin, unresponsiveness if severe |
| High blood sugar (hyperglycemia) | Excessive thirst/urination, fatigue, fruity breath (serious), nausea, deep rapid breathing (emergency), drowsiness |
| Skin / feet | Cuts, blisters, color change, swelling, drainage — delayed healing |
| Illness interaction | Poor intake, vomiting, infection — sugars may swing; report early |
CNA actions: know who is diabetic on your assignment; report incomplete meals if the resident receives glucose-lowering meds; never cut toenails of a diabetic unless facility policy and training explicitly allow (many facilities prohibit CNA nail cutting for diabetics); inspect feet during care and report breaks in skin; do not ignore new confusion in a diabetic resident.
Heart Failure (CHF): Fluid and Breathing Clues
Heart failure means the heart cannot pump effectively enough for body needs. Fluid may back up into lungs or tissues.
Warning Signs to Report
- Increased shortness of breath, especially lying flat (orthopnea) or sudden night breathlessness
- New or worse swelling of feet, ankles, legs, or abdomen
- Sudden weight gain (fluid) if weights are measured
- Fatigue out of proportion, dry cough or frothy sputum, cyanosis
- Chest pain, extreme anxiety with air hunger, or confusion with low oxygen signs
CNA care adaptations: semi-Fowler's or preferred elevated position for comfort as allowed; balance activity with rest; accurate I&O and weights if ordered; low-sodium diet compliance support if ordered; report ignored fluid restrictions or sudden shoe/sock tightness.
COPD and Chronic Lung Disease
COPD (including emphysema and chronic bronchitis patterns) causes chronic airflow limitation. Residents may use inhalers (nurse/self per plan), oxygen, and pursed-lip breathing techniques taught by therapy/nursing.
Warning Signs to Report
- Increased dyspnea, wheezing, or inability to finish sentences
- Change in sputum color/amount (infection concern)
- Blue lips/nail beds, extreme agitation or sleepiness with breathing trouble
- Fever with respiratory change
- SpO2 below parameters if you are assigned to measure it
CNA actions: do not adjust O2 liter flow without nurse direction; allow rest before ADLs; avoid rushing; report if the resident removes O2 constantly; keep tubing safe and unobstructed; never use petroleum products near oxygen if policy forbids; know smoking/oxygen fire safety (Safety domain overlap).
CVA / Stroke: Time-Critical Recognition
A cerebrovascular accident (stroke) interrupts brain blood flow. FAST-style recognition is classic teaching:
- Face drooping
- Arm weakness (especially one-sided)
- Speech difficulty
- Time to get help immediately
Also report sudden severe headache, vision loss, confusion, trouble walking, or unequal grip. For a new stroke-like event, this is an immediate nurse / emergency situation — note the time symptoms were last known normal if known.
After Stroke (Care Plan Phase)
- Dress weak side first; undress strong side first (common teaching)
- Support weak arm; never pull on it
- Place call light and items on the strong or accessible side as directed
- Aspiration risk: follow diet texture and feeding precautions exactly
- Communication: yes/no questions, patience, speech tools per plan
- Safety: neglect of one side of body may mean the resident forgets the weak side exists — protect limbs during transfers
Hypertension (High Blood Pressure)
Many residents have hypertension managed with meds and lifestyle orders. CNAs do not diagnose HTN but may measure BP if trained/assigned and must report values outside parameters plus symptoms.
Warning Signs of Possible Crisis / Concern
- Very high BP reading per facility parameters (report the number)
- Severe headache, blurred vision, chest pain, severe anxiety, nosebleed with high readings, sudden neuro change
- Dizziness after new meds or when standing (orthostatic symptoms) — assist with slow position changes
Do not withhold or give BP medication — that is the nurse's role. Report if the resident refuses meds or vomits after doses when you observe it.
Arthritis: Pain, Stiffness, and Joint Protection
Arthritis causes joint inflammation and pain (osteoarthritis, rheumatoid, and others). CNA focus is comfort and joint protection, not curing the disease.
Care Tips and Reportables
- Allow extra time for ADLs; warm water may ease morning stiffness (per preference/plan)
- Use assistive devices; avoid forcing painful joints during ROM — follow therapy limits
- Report hot, red, suddenly swollen joints; fever with joint pain; sudden inability to bear weight
- Position for comfort with pillows; handle gently
- Encourage movement as tolerated — complete immobility worsens stiffness, but pain limits must be respected and reported
Pressure Injuries: Skin as a Disease-Process Priority
Pressure injuries (pressure ulcers) result from unrelieved pressure, shear, and friction — often over bony prominences. They are a quality and safety focus in nursing facilities.
Stages Concept (Recognition Level)
CNAs are not required to formally stage like a wound nurse, but should recognize and report:
- Persistent non-blanchable redness on intact skin
- Blisters, shallow open areas, crater-like wounds, dark tissue
- Purple/maroon localized discoloration that may signal deep tissue injury
- Drainage, odor, or increased pain at a site
CNA Prevention and Response
- Reposition at least every 2 hours if the resident cannot move (unless plan differs)
- Keep skin clean and dry; manage incontinence promptly
- Reduce friction/shear during boosts; use draw sheets
- Report devices digging into skin (including stocking rolls, oxygen tubing)
- Never massage deep red or purple pressure areas aggressively
- Nutrition/hydration support and heel elevation off the mattress as ordered
Immediate Report vs End-of-Shift Report
| Report now | Report promptly same shift |
|---|---|
| Stroke signs, chest pain, severe dyspnea, unresponsiveness | Gradual increase in edema noted over the day |
| Severe hypoglycemia signs, seizure, major bleeding | Mild new rash without distress |
| Falls with head injury signs, suspected fracture | Stable chronic pain at baseline needing PRN nurse follow-up |
| Choking unrelieved, suicide talk (see 11.4), fire | Equipment needs (walker tip worn) when resident currently safe |
When in doubt, report sooner. Licensed nurses would rather hear an early concern than discover a crisis late.
Objective Reporting Language
Good report: "Mrs. Lee's right grip is weaker than this morning; face looks uneven; speech harder to understand since 1410. BP 168/96, pulse 98. She was at baseline after breakfast."
Weak report: "I think she's having a stroke and she's always dramatic."
Stick to time, observations, vitals, and baseline comparison. Disease Process exam items reward that discipline.
A resident with diabetes becomes sweaty, shaky, and newly confused. What is the CNA's best first action?
Which set of signs most clearly suggests a possible stroke and requires immediate nurse notification?
When caring for a resident with heart failure, which observation should the CNA report promptly?