NR 324 Week 3 Altered Perfusion
Student Name
Chamberlain University
NR-324 Adult Health I
Prof. Name
Date
Adult Health I – Week 3: Altered Perfusion
Introduction to Nursing Care: Understanding Altered Perfusion
Perfusion refers to the flow of blood through arteries and capillaries to deliver oxygen and nutrients to the body’s tissues. Central perfusion relates to the heart’s ability to pump blood to vital organs, whereas peripheral perfusion focuses on blood delivery to the extremities. Without sufficient perfusion, tissue hypoxia, cellular injury, and eventually death may occur. Numerous health conditions can compromise perfusion, including hyperlipidemia, diabetes mellitus, peripheral arterial disease, and arteriosclerosis.
The Clinical Judgment Measurement Model (CJMM) helps nurses identify and act upon changes in perfusion. It emphasizes a sequence: recognizing cues, analyzing their significance, prioritizing hypotheses, generating solutions, taking action, and evaluating outcomes.
Clinical Judgment Measurement Model Applications
CJMM Example 1: Recognizing Low Blood Pressure
- Recognizing a cue: Identifying low blood pressure
- Analyzing the cue: Interpreting low BP within the clinical context
- Prioritizing a hypothesis: Determining the urgency of intervention
- Generating solutions: Planning care actions like fluid replacement or repositioning
CJMM Example 2: Elevating the Head of Bed Before Oxygen
This demonstrates planning that considers:
- Timing
- Priority of intervention
- Resource availability
- Patient safety
CJMM Example 3: Evaluating Outcomes After Medication
- Action: Reassessing BP after administering antihypertensives
- Outcome: Monitoring effectiveness and safety
- Prioritization: Ensuring timely and appropriate response if the medication fails
Scope and Consequences of Altered Perfusion
Perfusion is a continuum. At one end is normal perfusion, progressing to ischemia (reduced perfusion), and eventually infarction (complete tissue death).
| Type of Perfusion Deficit | Possible Consequences |
|---|---|
| Decreased peripheral perfusion | Ulcers, cold extremities, cyanosis, gangrene |
| Decreased central perfusion | Myocardial infarction, stroke, shock |
Recognizing Cues of Impaired Perfusion
Peripheral Perfusion
Signs include:
- Cool, pale or cyanotic skin
- Decreased capillary refill
- Hair loss on legs
- Diminished pulses
Central Perfusion
Indications:
- Chest pain, dyspnea
- Tachycardia or bradycardia
- Syncope or dizziness
- Confusion, anxiety, hypotension
Peripheral Vascular (Neurovascular) Assessment – The 6 Ps
| 6 Ps of Neurovascular Assessment |
|---|
| Pain |
| Pallor |
| Pulselessness |
| Paresthesia |
| Paralysis |
| Poikilothermia |
Analyzing Cues: Clinical Examples
| Symptom | Scope | Possible Cause |
|---|---|---|
| Difficulty speaking (Dysphasia) | Localized to brain speech centers | Focal cerebral artery occlusion |
| Weakness and visual changes | Regional to the brain | TIA or stroke due to vascular obstruction |
| Loss of consciousness | Systemic | Cardiac arrest or shock |
Prioritizing Hypotheses in Altered Perfusion
When prioritizing, assess:
- Urgency: Is the client at immediate risk?
- Resources: Are IV fluids or oxygen available?
- Time: Did symptoms emerge suddenly?
- Observation vs. Immediate Action: Can the client be monitored or do they need urgent care?
| Hypothesis | Urgency | Indicators |
|---|---|---|
| Altered central perfusion | Immediate | Loss of consciousness, absent peripheral pulses |
| Fluid volume deficit | Immediate | Hypotension, tachycardia |
| Knowledge deficit | Low risk | Client lacks knowledge of hydration strategies |
Generating Solutions: Care Planning
| Priority | Nursing Action | Rationale |
|---|---|---|
| High (Central perfusion) | Place in supine position | Promotes cerebral blood flow |
| High (Fluid deficit) | Initiate IV or oral hydration | Replaces volume, improves perfusion |
| Low (Education) | Teach hydration during heat exposure | Prevents recurrence of fluid loss-related symptoms |
Taking Action: Implementation Phase
| Nursing Problem | Nursing Action |
|---|---|
| Altered perfusion | Positioning, monitoring vitals |
| Altered fluid balance | Administer fluids, track intake and output |
| Knowledge deficit | Provide education on prevention strategies |
Evaluating Outcomes
Outcomes that indicate success include:
- Normalized BP and HR
- Improved mental status and perfusion indicators
- Resolved dizziness
- Stable intake/output
- Verbalization of self-care strategies
Electrocardiogram (ECG) Interpretation
Key Components
| Waveform | Significance |
|---|---|
| P Wave | Atrial depolarization |
| QRS Complex | Ventricular depolarization |
| T Wave | Ventricular repolarization |
| QT Interval | Full depolarization to repolarization |
Cardiac Conduction System
| Location | Rate (bpm) |
|---|---|
| SA Node | 60–100 |
| AV Node | 40–60 |
| Bundle of His | 40–45 |
| Purkinje Fibers | 20–40 |
Types of ECG Monitoring
| Type | Leads | Purpose |
|---|---|---|
| Continuous telemetry | 3–5 chest leads | Monitors real-time rhythm |
| Cardiac event monitoring | 1–2 leads | Correlates symptoms with rhythm |
| 12-lead ECG | 10 electrodes | Diagnoses myocardial infarction, etc. |
6-Step ECG Interpretation Method
- Identify P wave
- Measure PR interval (0.12–0.20 sec)
- Measure QRS (0.08–0.12 sec)
- Determine rhythm
- Calculate rate
- Interpret based on findings
Common Cardiac Dysrhythmias
| Rhythm | Description |
|---|---|
| Sinus Bradycardia | HR < 60 bpm |
| Sinus Tachycardia | HR > 100 bpm |
| Atrial Fibrillation | Irregular, absent P waves, atrial HR 350–600 bpm |
| Ventricular Tachycardia | Wide QRS, HR > 150 bpm |
| Ventricular Fibrillation | Chaotic, no cardiac output |
| Asystole | Flatline, no electrical activity |
| PEA | Electrical activity without a pulse |
Electrolytes and Electrical Activity
| Electrolyte | Role |
|---|---|
| Sodium | Controls depolarization |
| Potassium | Crucial in repolarization phases |
| Calcium | Facilitates muscle contraction |
| Magnesium | Stabilizes electrical conduction |
Hypertension: Primary vs. Secondary
| Primary Hypertension | Secondary Hypertension |
|---|---|
| Chronic, lifestyle-related | Caused by another medical condition |
| Managed via diet/exercise/meds | Triggered by trauma, anxiety, illness |
Client Education Topics
- Reduce sodium intake
- Adhere to medication regimen
- Perform regular exercise
- Monitor BP at home
- Quit smoking
Myocardial Infarction (MI): A Critical Alteration in Perfusion
When a coronary artery becomes completely blocked, the tissue supplied by it begins to die. This event, called myocardial infarction, must be treated rapidly. Medications such as aspirin and nitroglycerin are initial interventions, but cardiac catheterization is often required to reopen the artery.
| Type | Description |
|---|---|
| Stable Angina | Occurs with exertion, relieved by rest |
| Unstable Angina | Occurs suddenly, not relieved by rest or meds |
Emergency Management of Acute Coronary Syndrome (ACS)
MONA Protocol
- Morphine: Relieves pain and dilates vessels
- Oxygen: Improves oxygen supply
- Nitroglycerin: Vasodilator for ischemic pain
- Aspirin: Antiplatelet agent
Common Risk Factors and Considerations
- Older Age
- Diabetes Mellitus
- Hypertension
- Sedentary Lifestyle
- Smoking and Alcohol Use
References
American Heart Association. (2022). Understanding blood pressure readings. Retrieved from https://www.heart.org
Ignatavicius, D. D., & Workman, M. L. (2021). Medical-surgical nursing: Concepts for interprofessional collaborative care (10th ed.). Elsevier.
Lewis, S. L., Bucher, L., Heitkemper, M. M., & Harding, M. (2020). Medical-surgical nursing: Assessment and management of clinical problems (11th ed.). Elsevier.
NR 324 Week 3 Altered Perfusion
Brady, W. J., Truwit, J. D., & DeLorenzo, R. A. (2021). Electrocardiography in emergency medicine. Cambridge University Press.