Midwife Licensure Exam Fundamentals of Care & the Health-Care Process — Vital Signs & Basic Physiologic MonitoringSummary

Key Concepts

Important Points

• **Adult vital sign normals:** Temperature (oral) 36.5–37.5°C; Pulse 60–100 beats/min; Respiration 12–20 breaths/min; Blood pressure <120/80 mmHg; SpO₂ 95–100%. These are high-yield NLE points.
• **Temperature routes:** Rectal ≈ 0.5°C higher than oral (most accurate core); Axillary ≈ 0.5°C lower than oral (safest but least accurate); Oral ~37°C average.
• **Fever management:** Provide tepid (not cold) sponging to avoid shivering and vasoconstriction; increase fluid intake to prevent dehydration; administer **paracetamol** (adult 500 mg–1 g Q4–6H, max 4 g/day) as first-line antipyretic.
• **Pulse assessment:** Count **apical pulse for one full minute** before administering digoxin. **Hold digoxin if apical HR <60 beats/min** in an adult. Pulse deficit (apical − radial difference) indicates weak contractions and requires assessment of cardiac status.
• **Critical digoxin rule:** This is frequently tested on the NLE. Always count apical pulse for a full minute, and do not administer if <60/min in an adult without physician order.
• **Respiration assessment:** Count **without the patient's awareness** (patients consciously alter their breathing when observed). For regular breathing, count 30 seconds and multiply by 2; for irregular, count a full minute.
• **Abnormal breathing patterns:** **Cheyne-Stokes** (alternating apnea and hyperpnea) suggests serious illness or end-of-life; **Kussmaul** (deep, rapid) indicates metabolic acidosis or DKA.
• **SpO₂ and hypoxemia:** Normal SpO₂ 95–100%. **SpO₂ <90% = hypoxemia** and requires immediate intervention (supplemental oxygen, positioning, suctioning). In COPD retainers, target may be 88–92% to avoid suppressing hypoxic drive.
• **Blood pressure measurement errors:** **Cuff too small = falsely HIGH** reading; **cuff too large = falsely LOW** reading. Patient position: arm at heart level, seated with back supported, feet flat. **Measure with arm below heart level = falsely high**; **above heart level = falsely low**.
• **Orthostatic hypotension:** Drop of ≥20 mmHg systolic **OR** ≥10 mmHg diastolic when moving from lying to standing. Risk factors: dehydration, blood loss, prolonged immobility, antihypertensive or vasodilating medications.
• **Pain as the fifth vital sign:** Pain is **subjective**—'whatever the patient says it is.' Always believe the patient's report. Use numeric 0–10 scale (adults); Wong-Baker FACES (children 3–8); FLACC (nonverbal infants/cognitively impaired). Document and reassess 30–60 minutes after intervention.
• **WHO analgesic ladder:** Step 1: non-opioids ± adjuvants; Step 2: weak opioids ± non-opioids + adjuvants; Step 3: strong opioids ± non-opioids + adjuvants.
• **Opioid safety:** Monitor for respiratory depression (RR <12/min). **Naloxone** is the opioid antagonist. **Paracetamol** is first-line and has a lower abuse potential.
• **Non-pharmacologic pain management:** Cutaneous stimulation (massage, heat/cold, TENS), distraction (music, conversation), relaxation/imagery (breathing, PMR, guided imagery), cognitive-behavioral techniques, and spiritual support. These complement and can reduce required analgesic doses.
• **Early warning signs of deterioration:** Rising HR + rising RR + falling BP + falling SpO₂ = early shock/sepsis. Rising temp + rising HR/RR + falling SpO₂ = possible infection/sepsis. **Report immediately.**
• **Pediatric assessment:** Infants have HR 120–160/min, RR 30–60/min, lower BP than adults. Count apical pulse and respirations for **one full minute** in infants/young children (assess when calm). Use brachial pulse for infant CPR.
• **Older adult considerations:** Blunted fever response (normal temperature ≠ ruled-out infection); stiffer arteries (wider pulse pressure); greater orthostatic hypotension risk. Compare to **patient baseline**, not just norms.
• **Always compare to patient baseline:** A single 'abnormal' reading may be normal for that patient. Trends and context matter more than isolated values.
• **Temperature conversion:** °F = (°C × 9/5) + 32; °C = (°F − 32) × 5/9. Example: 37°C = 98.6°F.
• **Pulse grading:** 0 = absent; 1+ = weak/thready; 2+ = normal; 3+ = bounding. Bilateral equality is important.
• **Never palpate both carotids simultaneously** due to risk of decreased cerebral perfusion.
• **Documentation must include:** Route/site, date, time, and clinical context. Plot on graphic flow sheet to visualize trends.
• **RA 9173 requirement:** The nursing scope of practice includes vital sign assessment, documentation, and reporting of abnormal findings. Failure to report compromises patient safety and violates professional standards.

Chapter Objectives

• Measure and accurately record temperature, pulse, respiration, blood pressure, and pain using appropriate techniques and anatomic sites.
• Identify normal vital sign ranges across the adult lifespan and recognize deviations (pyrexia, hypothermia, tachycardia, bradycardia, tachypnea, bradypnea, orthostatic hypotension, and hypoxemia).
• Understand the physiologic regulation of vital signs and factors that influence them (age, circadian rhythm, exercise, medications, stress, environment, disease).
• Apply knowledge of vital signs to detect early warning signs of patient deterioration and communicate findings appropriately.
• Implement pharmacologic and non-pharmacologic nursing interventions for fever, abnormal heart rate, and pain in accordance with Philippine healthcare standards.
• Document vital signs accurately with route/site, date, time, and clinical context, and plot trends on graphic flow sheets.
• Prioritize vital sign assessment and intervention using Maslow's hierarchy, addressing life-threatening abnormalities first.

Concept Relationships

• **Vital Signs as Integrated Indicators:** The four classical vital signs (temperature, pulse, respiration, blood pressure) work together to reflect overall physiologic status. A fever (elevated temperature) typically increases heart rate and respiratory rate as the body attempts to meet elevated metabolic demands. A patient with sepsis may exhibit fever, tachycardia, tachypnea, and hypotension—a constellation of findings indicating critical illness. Pain, the fifth vital sign, often elevates heart rate, respiratory rate, and blood pressure through activation of the sympathetic nervous system.
• **Thermoregulation and Fever as a Protective Response:** Fever is the body's mechanism to fight infection by raising the hypothalamic set point. The three phases of the febrile response (onset/chill, course/plateau, and defervescence/crisis) require different nursing approaches: provide warmth during onset; increase fluids and cooling measures during plateau; monitor for dehydration during defervescence. Understanding this relationship guides appropriate fever management (not simply 'treating down' all fevers).
• **Cardiac Output and Vital Signs:** Cardiac output (CO = heart rate × stroke volume) is reflected in the pulse. A compensatory tachycardia often occurs with decreased stroke volume (from hemorrhage, dehydration, or cardiac dysfunction), representing the body's attempt to maintain adequate tissue perfusion. Blood pressure maintenance relies on adequate cardiac output; falling BP with rising HR may indicate shock. Respiratory rate rises in response to metabolic acidosis or decreased oxygenation, further illustrating the integration of vital signs.
• **Oxygen Delivery Chain:** Respiration → Oxygen saturation (SpO₂) → Hemoglobin oxygen content → Cardiac output → Tissue perfusion. Hypoxemia (SpO₂ <90%) impairs oxygen delivery. The body compensates with tachycardia and tachypnea. If compensation fails, hypotension and altered mental status follow, indicating inadequate tissue perfusion.
• **Pain's Systemic Effects:** Acute pain triggers the sympathetic nervous system, raising heart rate, respiratory rate, and blood pressure—findings that may be mistaken for other causes of vital sign elevation. Conversely, unrelieved chronic pain can lead to depression, immobility, and deterioration. Effective pain management often normalizes other vital signs and improves overall patient outcomes.
• **Age and Vital Sign Norms:** Vital sign 'normals' change across the lifespan. Newborn HR 120–160 beats/min decreases toward adult 60–100 by adulthood; RR decreases from 30–60 to 12–20. Older adults maintain near-adult norms but may have wider pulse pressure, greater orthostatic changes, and blunted fever response. Comparing to age-appropriate or individual baseline norms is essential for accurate interpretation.
• **Medications and Vital Signs:** Many drugs influence vital signs: beta-blockers lower HR; vasodilators lower BP; stimulants raise HR and BP; opioids lower RR and BP. Understanding medication effects guides interpretation of vital signs and early detection of adverse effects (e.g., opioid-induced respiratory depression).
• **Early Warning System:** Serial vital signs form the foundation of the early warning system. Trending (not isolated measurements) reveals the trajectory of change. A patient whose BP is dropping while HR and RR rise is at risk for shock and requires urgent intervention. Nurses who recognize these patterns and escalate appropriately save lives.
• **Assessment Hierarchy:** Vital signs are typically assessed in order: temperature, pulse, respiration, blood pressure, and pain (or pain first in some patients). In acutely ill patients, assessment order may be altered based on clinical presentation. A patient in respiratory distress requires SpO₂ and respiratory assessment first; a patient with chest pain may require BP and cardiac assessment first. Context drives the sequence.

Practical Applications

• **Scenario 1: Post-Operative Patient with Rising Temperature and Tachycardia.** You assess a patient 18 hours post-operatively and find T 38.5°C axillary, P 110 beats/min apical, RR 24 breaths/min, BP 135/88, SpO₂ 94% on room air. The patient reports mild incisional pain (4/10) and appears anxious. **Nursing application:** Recognize this as possible early infection (fever, tachycardia, tachypnea). Monitor vital signs q1–2h; report the fever trend to the physician. Provide tepid sponging, ensure adequate fluids, and administer antipyretics as ordered. Assess the surgical wound for signs of infection (redness, warmth, drainage, dehiscence). Compare to the patient's baseline vitals at admission. Recognize that fever + tachycardia + tachypnea warrants escalation and possible cultures/imaging. Document T 38.5°C axillary at 10:00 AM with context (post-op day 1, incisional pain, appears anxious).
• **Scenario 2: Older Adult with Orthostatic Hypotension.** You assist a 78-year-old woman from bed. Vital signs sitting: BP 142/80; after standing 1 minute, BP drops to 115/68. The patient reports dizziness and unsteadiness. **Nursing application:** Recognize orthostatic hypotension (SBP drop of 27 mmHg, >20 mmHg). Check medications (antihypertensives, diuretics?); assess hydration status; consider blood loss. Implement safety measures: assist with ambulation, use bed rails, ensure call bell in reach. Encourage leg exercises before standing, gradual position changes, adequate hydration, and small, frequent meals. Document: 'BP sitting 142/80, standing 115/68 with dizziness; patient at fall risk.' This recognition allows prevention of falls—a major cause of morbidity in older adults in Philippine hospitals.
• **Scenario 3: Child with Fever and Pain.** A 5-year-old presents with T 39.2°C axillary, P 125 beats/min apical, RR 28 breaths/min, BP 100/65, and reports ear pain (8/10 on Wong-Baker FACES). Suspect otitis media. **Nursing application:** Assess pain first using age-appropriate scale (FACES for this child). Provide comfort: position with affected ear up, apply warm compress to ear. Administer paracetamol 250 mg PO as ordered (weight-based dosing). Reassess pain 30–45 minutes post-medication. Provide distraction (stories, music, play). Count apical pulse for full minute (pediatric assessment). Report persistent high fever or severe pain to physician; anticipate possible antibiotic prescription. Document: 'T 39.2°C axillary; pain 8/10 ears (FACES); given paracetamol 250 mg PO 10:00 AM; reassess 10:30 AM.'
• **Scenario 4: Patient on Digoxin with Apical Pulse Assessment.** Before administering a dose of digoxin to a 72-year-old with atrial fibrillation, you must count the apical pulse. You auscultate and count 58 beats/min over 1 minute. **Nursing application:** **Hold the digoxin.** Do not give the dose. Notify the charge nurse and physician immediately. An apical HR <60 in an adult is a contraindication to digoxin (risks toxicity and life-threatening arrhythmias). Document: 'Apical pulse 58 beats/min × 1 min (full minute count); digoxin dose held; physician notified at 08:15.' This is a critical patient-safety intervention and is tested on the NLE.
• **Scenario 5: Patient with Hypoxemia and COPD.** An older patient with COPD is on supplemental oxygen and shows SpO₂ 89% on room air. You know this patient is a chronic CO₂ retainer. **Nursing application:** Check the patient's standing orders and target SpO₂ range (often 88–92% in COPD retainers to avoid suppressing hypoxic drive). Maintain oxygen at the prescribed level. If SpO₂ drops below target, give oxygen cautiously (not aggressively); reassess after 15–20 minutes. Avoid high-flow oxygen that could suppress the hypoxic drive, worsening CO₂ retention and respiratory depression. Report trends (worsening SpO₂) to the physician. Document: 'SpO₂ 89% on prescribed O₂ (2L nasal cannula); patient alert, RR 18; within target range for this COPD patient.'
• **Scenario 6: Pain Assessment and Non-Pharmacologic Management.** A post-surgical patient rates pain as 7/10 despite receiving an analgesic 2 hours ago (not within the reassessment window yet). The patient is anxious and tense. **Nursing application:** While waiting for the next dose, implement non-pharmacologic measures: help with positioning (support with pillows to reduce strain), teach and guide deep breathing (slow, deep inspiration through nose, exhalation through mouth—reduces pain perception and anxiety), use distraction (turn on TV, encourage conversation), apply a warm blanket if appropriate, and offer a calm, reassuring presence. Massage non-affected areas gently. These measures complement the analgesic and may help 'bridge' until the next dose. Reassess pain 15–20 minutes after these interventions. Document: 'Pain 7/10 at 2-hour post-dose point; positioned for comfort, deep breathing taught and performed, distraction offered. Reassess 15 min.'
• **Scenario 7: Recognizing Early Shock.** You are monitoring a patient post-operatively. Initial vitals (morning): T 37.2°C, P 88, RR 16, BP 130/80, SpO₂ 98%. By 4 PM: T 37.8°C, P 106, RR 22, BP 110/72, SpO₂ 95%. By 8 PM: T 38.1°C, P 118, RR 26, BP 95/60, SpO₂ 92%. **Nursing application:** Recognize the **downward BP trend with rising HR, RR, and temperature**—classic early shock. Do not dismiss this as normal post-op variation. **Report immediately to the physician/charge nurse.** Initiate continuous monitoring; start IV fluid if not already running; ensure adequate peripheral access; keep patient NPO pending evaluation; monitor urine output; repeat vitals q15–30min. This early recognition and escalation may prevent progression to severe shock. Document the trends on the flow sheet and in narrative: 'Trending down: BP dropped 35 mmHg SBP over 8 hours with rising HR, RR, temp. Early shock suspected. Reported to Dr. at 20:10.'
• **Scenario 8: Documentation of Accurate Vital Signs.** You assess a patient and obtain vitals. Write a correctly documented entry: **'VS: T 37.9°C (tympanic), P 96 apical (regular rhythm, 2+ volume), RR 20 (labored), BP 145/92 (right arm, seated, arm at heart level), SpO₂ 96% on room air. Patient reports dyspnea with exertion, mild headache. (Nurse initial, time, date).'** This entry includes route/site for all measurements, rhythm quality for pulse, respiratory effort for RR, patient's report of symptoms, and context. It is complete and defensible.
• **Scenario 9: Assessing Vital Signs in an Infant.** You are assessing a 3-month-old. You approach the calm infant, first count the apical pulse (15 seconds × 4, full minute preferred = 132 beats/min), then count respirations without disturbing the infant (count 30 sec × 2 = 58 breaths/min), then take temperature axillary = 37.2°C, then BP (if needed, using appropriately sized cuff) = 85/55. **Nursing application:** Recognize these as **normal** for a 3-month-old (HR 120–160, RR 30–60, lower BP). Always count **apical pulse and respirations for a full minute** in infants. Assess the infant when calm. Use the brachial pulse for any infant CPR if needed. Document: 'Infant VS: T 37.2°C axillary; P 132 apical × 1 min (regular); RR 58 × 1 min (regular rhythm); BP 85/55 right thigh. All within normal for 3-month-old.'
• **Scenario 10: Communication and SBAR Report.** You are caring for a post-MI patient and note: HR rising from 92 (last hour) to 108 (now), RR 22, BP 118/76 (trending down from 135/85 this morning), and patient reports chest tightness (2/10, better with rest). **Nursing application:** Use SBAR to escalate: **'Situation:** I'm caring for Mr. R, post-MI day 2. **Background:** He's been stable but I'm noting new trends. **Assessment:** Heart rate increased from 92 to 108 in the last hour, RR 22, and BP trending down this morning (135/85 → 118/76). He's reporting mild chest tightness. **Recommendation:** I'd like the cardiac monitor strip reviewed and consider if an EKG is warranted to assess for ischemia.' This structured communication ensures the physician understands the concern and acts appropriately. Prompt escalation prevented delayed care and demonstrates professional communication per RA 9173 standards.