HOMEOSTESIS

Module Outline, Learning Outcomes, and Core Definitions

• Module Outline

  • The concept of tissue integrity

  • Normal tissue integrity

  • Alterations to tissue integrity

  • Concepts related to tissue integrity

  • Health Promotion

  • Nursing Assessment

  • Independent Interventions

  • Collaborative Therapies

  • Lifespan Considerations

  • Tissue Integrity Exemplars: Exemplar 21.a Burns, Exemplar 21.b Pressure Injuries, Exemplar 21.c Wound Healing

• Learning Outcomes

  • 21.1: Analyze the physiology of tissue integrity in the body.

  • 21.2: Differentiate alterations in tissue integrity.

  • 21.3: Outline the relationship between tissue integrity and other concepts.

  • 21.4: Explain the promotion of healthy tissue integrity.

  • 21.5: Differentiate among common assessment procedures and tests used to examine tissue integrity.

  • 21.6: Plan and implement culturally congruent nursing care for an individual with alterations in tissue integrity.

  • 21.7: Summarize collaborative therapies used by interprofessional teams for patients with alterations in tissue integrity.

  • 21.8: Differentiate considerations related to the care of patients with alterations in tissue integrity across the lifespan.

  • 21.A: Analyze burns as they relate to tissue integrity.

  • 21.B: Analyze pressure injuries as they relate to tissue integrity.

  • 21.C: Analyze wound healing as it relates to tissue integrity.

• Core Definitions & Key Terms

  • Tissue Integrity: Integumentary, mucous membrane, corneal, or subcutaneous tissues uninterrupted by wounds.

  • Impaired Tissue Integrity: Damage to integumentary, mucous membrane, corneal, or subcutaneous tissues.

  • Impaired Skin Integrity: Defined specifically as alterations to the dermis and epidermis.

  • Allergic Contact Dermatitis: A cell-mediated (Type IV) hypersensitivity response triggered when skin contacts an allergen.

  • Alopecia: Loss of hair.

  • Melena: Dark sticky feces containing partly digested blood.

  • Urticaria: Vascular reaction of the skin characterized by erythema and wheals (hives).

Normal Physiology of the Integumentary System

• Integumentary Components & Functions

  • The integumentary system includes the skin, hair, nails, and sweat, sebaceous, and mammary glands.

  • The skin is the largest organ in the human body.

  • Protection: Guards underlying tissues from microorganisms, chemical irritation, and mechanical trauma.

  • Sensation: Sensory nerves facilitate awareness of touch, pain, pressure, heat, and cold.

  • Thermoregulation: Regulated by the central and autonomic nervous systems via blood vessel dilation/constriction and sweat secretion by eccrine glands.

  • Excretion: Sweat glands eliminate waste solutions containing water, electrolytes, and urea.

  • Vitamin Synthesis: Synthesizes Vitamin D from sunlight/ultraviolet light exposure.

• Epidermal Layers

  • The epidermis is composed of epithelial cells and has 5 layers on the palms and soles, and 4 layers over the rest of the body.

  • Stratum Corneum: Outermost layer; comprises approximately $75\%$ of total epidermal thickness. Contains keratin, a fibrous water-repellent protein providing tough protection.

  • Stratum Lucidum: Lies directly below the stratum corneum only in areas of thick skin (palms and soles).

  • Stratum Granulosum: Layer $2\text{--}3$ cells thick; contains glycolipids that slow transepidermal water loss. Keratinization (thickening of plasma membrane) begins here.

  • Stratum Spinosum: Several cells thick; contains abundant cells arising from bone marrow that migrate to the skin.

  • Stratum Basale: Deepest layer; contains keratinocytes (produce keratin) and melanocytes (produce melanin pigment to shield keratinocytes and dermal nerve endings from UV damage).

• Dermal and Subcutaneous Structure

  • Dermis: Flexible connective tissue layer richly supplied with blood vessels, nerve fibers, and lymphatic vessels. Contains most hair follicles, sebaceous glands, and sweat glands.

    • Papillary Layer: Contains microscopic ridges indenting the epidermis, capillaries, and receptors for touch and pain.

    • Reticular Layer: Deeper layer containing blood vessels, glands, deep pressure receptors, and dense bundles of collagen fibers.

  • Subcutaneous Tissue (Hypodermis): Located beneath the dermis; composed of loose connective tissue and stores roughly $50\%$ of total body fat. Serves as thermal insulation, mechanical cushioning, and energy storage.

Cultural Considerations, Skin Color Variations, and Diversity

• Biological Variations in Skin Pigmentation

  • Individuals with lighter skin produce less melanin; individuals with darker skin produce more melanin.

  • Darkest skin tones historically align with regions near the equator with intense UV exposure (Pusirid et al., 2023).

  • In darker skin, melanocytes may exhibit an exaggerated response to tissue injury, causing hyperpigmentation at healed lesion sites (Markovich et al., 2022).

  • Melasma: Overproduction of melanin causing discolored facial patches (cheeks, upper lip, chin, forehead) after sun exposure. Bleaching creams or coverup cosmetics can cause irritation or interact with topical medications (Ludman, 2022).

• Assessment Techniques for Darker Skin Tones

  • Oxygenation & Color Changes: Inspect least pigmented areas: buccal mucosa, lips, tongue, nail beds, palms of hands, and soles of feet (Pusirid et al., 2023).

  • Pallor: Presents as an ashen gray color or a yellowish-brown tinge.

  • Cyanosis: Most prominent in nail beds, lips, and oral mucosa.

  • Jaundice: Inspect palms and soles. Do not confuse normal subconjunctival yellow fatty deposits in dark sclerae with true jaundice.

  • Pressure Injury Assessment: Darker skin rarely exhibits an identifiable blanching response. Apply light pressure to check for areas darker than surrounding skin, or skin that feels taut, shiny, or indurated (thick/firm). Assess local temperature and edema. Moistening the skin with tap water can highlight underlying color variations (Black et al., 2023).

• Focus on Culture and Ethnic Conditions

  • Color Awareness: Health assessment practice recognizing skin color relevance to clinical presentation across ethnicities.

  • Post-Inflammatory Hyperpigmentation: Common in African American individuals; inflammatory processes alter melanin synthesis/release following injury or treatment with electromagnetic devices like ultrasound (Schwartz, 2023).

  • Vitiligo: Occurs at disproportionate rates in African Americans; characterized by loss of melanocytes creating depigmented blotches (Fenckel and Prunnel, 2024).

  • Cultural Home Remedies: Patients may use remedies like olive oil, honey, or lemon juice; nurses must explore regimens without judgment.

Alterations to Tissue Integrity and Skin Disorders Classification

• Safety Alert: Latex Allergy

  • Estimated $8\%\text{--}12\%$ of Health Care Providers (HCPs) are allergic to latex (Nguyen et al., 2023; OSHA).

  • Attribute to widespread latex glove usage and increased reporting.

  • Contact dermatitis to latex is a Type IV T-cell-mediated delayed reaction.

  • Type I anaphylactic reactions begin within minutes and are severe/life-threatening.

  • Patients with latex allergies require clear identification and a latex-free environment; severely affected HCPs may require job relocation.

• Systemic Classification of Skin Disorders

  • Infectious: Caused by bacterial, fungal, viral, or parasitic agents (e.g., impetigo, athlete's foot, chickenpox, lice). Fungal infections are particularly destructive in immunocompromised hosts. Human papillomavirus (HPV) increases genital/GI tract cancer risks (CDC, 2024A; MedlinePlus, 2024).

  • Inflammatory: Associated with glandular overactivity, hormone surges, or environmental exposure (e.g., acne, burns, eczema, dermatitis, psoriasis, sunburn).

  • Neoplastic: Skin cancers stemming from cell damage (e.g., squamous cell carcinoma, basal cell carcinoma, malignant melanoma). Melanoma is the most dangerous neoplasm (US Cancer Statistics Working Group, 2024).

Contact Dermatitis and Inflammatory Conditions

• Contact Dermatitis Pathophysiology

  • Inflammatory skin condition characterized by damage to dermis and epidermis, presenting as a pruritic red rash. May form bullae, vesicles, or wheals corresponding to contact exposure.

  • Allergic Contact Dermatitis: Immune-mediated cell-hypersensitivity response to an allergen. Delayed onset. Older adults are more susceptible to allergic contact dermatitis due to lifetime cumulative exposure and sensitization (Johnson and Anjou, 2023; Ruenger, 2023b).

  • Irritant Contact Dermatitis: Non-immunologic direct chemical/physical damage to skin (acids, soaps, detergents, dyes, metals, perfumes). Rapid or cumulative onset. Highest incidence occurs in infants; older adults have diminished irritant reactions due to reduced dermal circulation and slow stratum corneum turnover (Fronway and Reiter, 2023).

Primary and Secondary Skin Lesions

• Primary Skin Lesions (Arise from previously intact, healthy skin):

  • Macule: Flat, nonpalpable skin color change ($< 1\,\text{cm}$).

  • Patch: Flat, nonpalpable skin color change ($> 1\,\text{cm}$).

  • Papule: Elevated, solid palpable mass ($< 1\,\text{cm}$).

  • Nodule: Elevated, solid palpable mass extending deeper into dermis ($1\text{--}2\,\text{cm}$).

  • Tumor: Elevated solid mass ($> 2\,\text{cm}$).

  • Vesicle: Fluid-filled elevated mass ($< 1\,\text{cm}$).

  • Bulla: Fluid-filled elevated mass ($> 1\,\text{cm}$).

  • Pustule: Pus-filled vesicle or bulla.

  • Wheal: Elevated, reddened localized area of edema (e.g., hive, insect bite).

• Secondary Skin Lesions (Result from changes in primary lesions over time):

  • Crust: Dried blood, serum, or pus on skin surface.

  • Scale: Shedding flakes of greasy or dry dead epidermal cells.

  • Lichenification: Rough, thickened area of epidermis secondary to chronic rubbing/scratching.

  • Scar: Connective tissue repair following destructive lesion.

  • Keloid: Hypertrophic scar tissue extending beyond original wound boundaries.

  • Excoriation: Linear erosion of epidermis caused by scratching or abrasion.

  • Fissure: Linear crack or split extending into dermis.

  • Erosion: Loss of superficial epidermal layer; non-bleeding.

  • Ulcer: Deep loss of skin tissue extending into dermis or deeper structures.

Classification and Emergency Management of Wounds

• Wound Etiology and Depth

  • Intentional: Created for therapeutic purposes (e.g., surgical incisions, venipuncture).

  • Unintentional: Accidental trauma (e.g., laceration from motor vehicle accident, compound fracture).

  • Closed Wound: No rupture of skin surface despite underlying tissue trauma (e.g., contusion).

  • Open Wound: Destruction of skin or mucous membrane barrier.

  • Partial Thickness Depth: Involves epidermis and dermis; heals via epithelial regeneration.

  • Full Thickness Depth: Involves epidermis, dermis, subcutaneous tissue, and potentially underlying muscle/bone; requires complex connective tissue repair.

• Contamination Categories

  • Clean: Uninfected, minimal inflammation; respiratory, alimentary, genital, and urinary tracts are not entered.

  • Clean-Contaminated: Surgical wound entering respiratory, alimentary, genital, or urinary tract under controlled conditions without evidence of infection.

  • Contaminated: Open, fresh, accidental wounds; surgical sites with major sterile technique breaks or massive GI contents spillage; acute non-purulent inflammation present.

  • Dirty or Infected: Purulent drainage or dead tissue present; clear clinical infection.

• Emergency First-Aid Guidelines for Untreated Wounds

  • Control Severe Bleeding: 1) Apply direct pressure directly over wound site; 2) Elevate the involved extremity above heart level.

  • Prevent Infection: 1) Flush/clean abrasions and lacerations using normal saline; 2) Cover wound with clean or sterile dressing. Wrap firmly to approximate edges and maintain pressure. If blood saturates the initial dressing, apply a second dressing directly over top—never remove the first dressing layer to prevent disturbing blood clots.

  • Reduce Pain & Swelling: Apply ice packs to wound and surrounding area.

  • Monitor Shock: Evaluate for rapid thready pulse, cold/clammy skin, pallor, and reduced blood pressure.

Epidemiology, Statistical Prevalence, and Genetics

• Epidemiological Data

  • Skin disorders affect $1$ out of every $4$ individuals in the United States at any given time (AAD, 2024A).

  • Acne: Affects approximately $50\,\text{million}$ Americans annually; $85\%$ of individuals aged $12\text{--}24\,\text{years}$ experience acne.

  • Atopic Dermatitis: Affects $25\%$ of children and $2\%\text{--}3\%$ of adults.

  • Hair Loss: Affects $80\,\text{million}$ individuals.

  • Herpes Simplex / Zoster: Affects $165\,\text{million}$ individuals.

  • Common Warts: Affects $33\%$ of children/teens and $3\%\text{--}5\%$ of adults.

  • Seborrheic Keratosis: $83.8\,\text{million}$ cases.

  • Solar Radiation Damage: $123.1\,\text{million}$ cases.

  • Fungal Infections: $9\,\text{million}$ cases.

  • Rosacea: $16\,\text{million}$ cases.

  • Psoriasis: $7.5\,\text{million}$ cases.

  • Pressure Injuries & Wounds: $2.5\,\text{million}$ cases (AAD, 2024B; Berlewitz, 2024; CDC, 2024B).

  • Melanoma Morbidity/Mortality (2019 CDC data): $90,365$ individuals diagnosed; $7,230$ deaths (CDC, 2024C; AAD, 2024B).

• Genetics and Non-Modifiable Factors

  • Heritable skin disorders include Epidermolysis Bullosa (severe blistering), Ichthyosis (thick scaly skin), and Albinism (melanin production deficit) (Johns Hopkins Medicine, 2024C).

  • Sex Differences: Men experience higher rates of infectious skin disorders; women experience higher rates of pigmentary and autoimmune disorders, linked to sex hormone variations (Cohen and Tembund, 2023).

  • Dark Skin Manifestations: Higher incidence of keloids, dyschromia, acne keloidalis, pseudofolliculitis, and dermatosis papulosa nigra (Armstrong, 2023).

Interprofessional Concepts and Modifiable Risk Factors

• Related Concepts

  • Immunity: Impaired tissue integrity activates immune responses; allergic/inflammatory responses disrupt skin protection.

  • Infection: Pathogen invasion through skin entry portals.

  • Mobility: Immobility causes prolonged ischemic pressure over bony prominences.

  • Perfusion: Reduced tissue blood flow impairs delivery of essential oxygen and nutrients.

  • Nutrition: Inadequate protein and essential vitamins compromise cellular repair.

  • Self-Perception / Safety: Alterations cause body image disturbances and fall risks.

• Patient Teaching for Dry Skin and Pruritus

  • Wash clothing in mild or fragrance-free detergent; double rinse; omit fabric softeners.

  • Avoid alcohol-containing lotions and perfumes.

  • Apply emollient lubricants immediately after bathing while skin is damp.

  • Bathe in tepid water; reduce bath frequency (daily bathing is not mandatory).

  • Add bath oils near the end of bathing (caution: increases tub fall risk).

  • Maintain ambient humidity with humidifiers; increase oral fluid intake.

  • Keep fingernails trimmed short; wear loose cotton clothing; keep room cool.

  • Apply cold compresses or brief direct pressure to soothe pruritus; wear cotton gloves at night.

• Preventive Interventions for Infection and Inflammation

  • Avoid personal items sharing (combs, brushes, hats) to eliminate parasites.

  • Avoid irritant exposures: poison ivy/oak/sumac, harsh acids/solvents, latex, nickel/metals.

  • Perform prompt diaper changes to prevent urine/feces maceration.

  • Recognize photosensitizing medications: corticosteroids (causes skin thinning), certain antibiotics, antifungals, cancer chemotherapy agents, and psychotropic drugs.

Nursing Assessment, Interviewing, and Diagnostic Testing

• Focused Health History Interview Questions

  • History of skin conditions, onset, location, pattern of spread, and prior successful treatments.

  • Presence of system symptoms (fever, chills, night sweats).

  • Exposures to toxins, chemicals, physical hazards, solar UV, novel soaps, detergents, or medications.

  • Dietary alterations, travel history, recent severe physical/emotional stressors.

  • Presence, color, and odor of wound exudate.

  • Tattoos, body piercings, or cosmetic brandings and associated healing complications.

• Physical Examination Techniques

  • Ensure intense, uniform lighting (daylight preferred).

  • Remove all medical and supportive devices (antiembolism stockings, braces, splints) to inspect covered skin.

  • Inspect skin folds, moist intertriginous zones, and pressure-bearing anatomical sites.

  • Evaluate edema depth (pitting scale up to $4+$ pitting).

• Diagnostic Procedures & Lab Values

  • Skin Biopsy: Punch, excision, or shave biopsy to differentiate benign lesions from malignancies.

  • Microbial Testing: Exudate/tissue cultures; immunofluorescence studies (Wood's lamp, KOH preparation, Tzanck test for viral vesicles).

  • Nasal Swab Cultures: Screening patients and healthcare personnel to detect asymptomatic bacterial carriers (e.g., MRSA).

  • Hemoglobin: Deficits impair oxygen delivery to healing tissue beds.

  • Coagulation Panel: Prolonged times increase hemorrhage risk; hypercoagulability causes microvascular thrombosis and local tissue ischemia.

  • Serum Albumin: Key nutritional indicator. Levels below $3.5\,\text{g/dL}$ signal severe protein deficiency, elevated infection risk, and delayed healing.

Independent Nursing Interventions and Collaborative Therapies

• Independent Nursing Actions

  • Promote proper skin hygiene: recommend gentle liquid cleansers over harsh bar soaps.

  • Teach wound cleaning, sterile technique, topical antibiotic application, hand hygiene, and medical waste disposal.

  • Instruct patients on identifying signs of localized infection and tissue necrosis.

  • Encourage bedridden patients to perform seated or lying range-of-motion exercises.

  • Dietary planning: advocate for elevated caloric intake, high protein, Vitamin A, and Vitamin C (Cleveland Clinic, 2024). Suggest small, frequent meals if full meals are not tolerated.

• Collaborative Medical & Pharmacologic Therapies

  • Acne Pharmacology: First-line topical agent is Benzoyl Peroxide (antiseptic, reduces bacterial burden, unplugs oil ducts; Reynolds et al., 2024). Salicylic acid provides exfoliation and anti-inflammatory action. Retinoids aid cellular turnover.

  • Combination Therapies for Darker Tones: Microdermabrasion or chemical peels combined with topicals improve efficacy (Harnchwang et al., 2024; Dwabta et al., 2023).

  • Negative Pressure Wound Therapy (NPWT): Vacuum-assisted closure applied to deep or non-healing wounds.

  • Complementary Health Approaches: Aloe vera gel, chamomile, and evening primrose oil are used to soothe inflammation, but evidence is inconclusive; monitor for drug interactions and allergies (NCCIH, 2021).

Lifespan Considerations: Newborns, Children, Adolescents, Pregnancy, and Aging

• Newborn Tissue Integrity

  • Vernix Caseosa: Waxy layer of lipids, shed cells, and sebum protecting fetal skin in utero; provides anti-infective, thermoregulatory, moisturizing, and antioxidant qualities (Bam Allen et al., 2023; Kaneshiro, 2023).

  • Common Benign Newborn Findings: Milia, neonatal acne (maternal hormone surge), Erythema Toxicum (blotchy rash appearing $1\text{--}3\,\text{days}$ post-delivery, clearing by $1\,\text{week}$), Stork Bites (telangiectatic nevi fading by $18\,\text{months}$), Mongolian spots, cafe-au-lait spots, port-wine stains, hemangiomas.

  • Anatomical Differences: Newborn skin is $40\%\text{--}60\%$ thinner than adult skin with sparse subcutaneous fat, causing accelerated heat loss, poor temperature regulation, and high chemical/topical drug absorption (Ball et al., 2022).

• Pediatric Tissue Integrity

  • High Body Surface Area (BSA) to mass ratio elevates risk for thermal loss, fluid dehydration, and topical toxin absorption. Skin progressively thickens into the $40\text{s}\text{--}50\text{s}$ (Stomidas et al., 2023).

  • Erythema Infectiosum (Fifth Disease): Parvovirus B19 (PVB19). Slapped-cheek facial rash with lacy exanthem on body. Self-limiting ($4\text{--}21\,\text{days}$); spring/early summer. Treated with rest and fluids (Kostolansky and Weymak, 2023).

  • Pityriasis Rosea: Viral-origin rash. Begins with a solitary "herald patch" on trunk, followed by pink/tan scaly eruptions along skin cleavage lines. Duration $4\text{--}8\,\text{weeks}$.

  • Roseola Infantum: Human Herpesvirus 6 (HHV-6). Occurs in children $< 2\,\text{years}$. High fever for $3\text{--}5\,\text{days}$ followed by rapid rash emergence upon fever defervescence. Transmitted via respiratory droplets (incubation $5\text{--}15\,\text{days}$). Complication: febrile seizures (Johns Hopkins Medicine, 2024D; Mullens and Krishnamurti, 2023).

• Adolescents

  • Testosterone increases sebum production and axillary apocrine sweating.

  • Female menstrual cycles induce premenstrual exacerbations of eczema, psoriasis, and systemic lupus erythematosus.

  • High incidence of warts and tinea infections from athletic facilities (Wittstein and Johnson, 2021).

• Pregnancy

  • Hormonal skin manifestations: Hyperpigmentation (linea nigra, chloasma), striae gravidarum (stretch marks), pruritus gravidarum.

  • Atopic Eruption of Pregnancy (AEP): Occurs in $75\%$ of pregnancy-related skin disorders. Eczematous lesions on neck and limb flexor surfaces prior to third trimester. Resolves postpartum; fetus unaffected, but child has increased atopic dermatitis risk (Curian et al., 2024; Pomerantz, 2023).

• Older Adults (Table 21.6 Skin Aging)

  • Intrinsic Aging: Begins ~age $20$ (exfoliation slows). By age $30$, moisture transfer dermis-to-epidermis declines and fat cells shrink. By age $40$, collagen synthesis stops. Sebaceous glands shrink, causing skin dryness and fragility. Menopause drops estrogen, thinning skin further.

  • Extrinsic Aging: Environmental UV exposure and free radical damage cause cornified layer thickening, solar elastosis, deep wrinkles, precancerous actinic keratoses, and freckling (Kruppmann et al., 2021).

  • Functional Changes: Subcutaneous fat loss/redistribution (loss on face/hands, gain on abdomen/thighs) impairs thermoregulation and cushioning over bony prominences. Melanocytes decline (paler skin), but localized solar lentigines (age spots) form. Dermal microvessel fragility causes senile purpura (Bradke, 2022).

Clinical Case Study: Arthur Sullivan

• Case Study Part 1 Summary

  • Patient Profile: 52-year-old male, height $6'3"$, weight $342\,\text{lbs}$. Post-neurosurgery for pituitary tumor with external ventricular drainage system.

  • Activity Status: Strict supine bed rest at $\le 20^\circ$ angle for $3\,\text{days}$.

  • Complication 1: Compression pumps poorly fitting due to body size. Day 2: Left leg Deep Vein Thrombosis (DVT) develops.

  • Complication 2: Anticoagulants contraindicated so early post-neurosurgery. Inferior Vena Cava (IVC) filter placed. Filter clogs with emboli, inducing massive bilateral lower extremity edema.

  • Complication 3: Week 1: IV Heparin initiated (titrated to PTT of $60\,\text{seconds}$). Day 3 of Heparin: Mid-tibia varicose vein ruptures, spurting blood.

  • Clinical Judgment Questions (Level 1 & 2):

    1. What assessment techniques should the nurse use to determine the source of bleeding?

    2. What are the immediate nursing priorities for Mr. Sullivan?

    3. What risk factors does Mr. Sullivan have for developing edema after insertion of the inferior vena cava filter?

    4. What factors may have contributed to the rupture of a vein?

    5. Once bleeding is controlled, what responsibilities does the nurse have in caring for Mr. Sullivan's wound?

    6. What additional nursing interventions should have been implemented post-op to prevent blood clots and edema?

• Case Study Part 2 Summary

  • Hospitalization: Extended to $8\,\text{weeks}$. Ambulating with physical therapy ($\ge 15\,\text{minutes}$ $3\times\,\text{daily}$).

  • Medical Regimen: Furosemide $80\,\text{mg}$ daily, oral Warfarin $4\,\text{mg}$ daily (target INR $2.5$), compression stockings, leg elevation.

  • Ulcer Progress: Diagnosed with chronic venous disease. Experienced $4$ hemorrhage episodes from mid-tibia site. Rupture site evolved into Grade C6 venous ulcer measuring $2.8\,\text{cm}\times 2.3\,\text{cm}\times 0.6\,\text{cm}$. Exudes dark reddish-brown serosanguineous fluid without infection signs. Surrounding tissue exhibits purple discoloration ($19\,\text{cm}\times 11\,\text{cm}$).

  • Wound Care: Cleansed with sterile saline, alginate dressing applied, wrapped with elastic bandage, compression stocking applied over top.

  • Clinical Judgment Questions (Level 1 & 2):

    1. What nursing assessments should be performed to monitor the status of the venous ulcer?

    2. Why has the skin around the venous ulcer turned purple?

    3. Based on location and dimensions ($2.8\,\text{cm}\times 2.3\,\text{cm}\times 0.6\,\text{cm}$), which skin layers are affected and what are the clinical implications?

    4. How would Mr. Sullivan's care plan change if the ulcer develops an infection?

    5. What other therapies are available to heal the venous ulcer?

    6. Anticoagulation vs procoagulant dressing: which treatment is higher priority at this point?

• Case Study Part 3 Summary

  • Timeline: $3\,\text{years}$ post-neurosurgery. Venous ulcer measuring $2.5\,\text{cm}\times 1.8\,\text{cm}\times 0.4\,\text{cm}$. Surrounding purple skin area measures $22\,\text{cm}\times 13\,\text{cm}$. Off anticoagulants; no recent bleeding. Disturbed body image reported.

  • Procedure: Sclerotherapy performed by dermatologist to collapse incompetent venous vessels.

  • Post-Procedure Treatment: Daily topical Sucralfate covered with simple gauze, elastic bandage wrap, and compression stockings.

  • 6-Month Outcome: Ulcer dimensions reduced to $1.3\,\text{cm}\times 0.8\,\text{cm}\times 0.2\,\text{cm}$. Discolored purple area unchanged.

  • Clinical Judgment Questions (Level 1 & 2):

    1. As the dermatologist's nurse, what patient teaching will you provide before sclerotherapy?

    2. How does ablation of damaged veins contribute to ulcer healing?

    3. Once the ulcer heals completely, what maintenance therapy is needed?

    4. What are the long-term consequences of Mr. Sullivan's venous ulcer?

    5. What patient teaching is necessary to prevent future venous ulcers?

    6. What nursing interventions are appropriate for his disturbed body image?

Learning Exercises, Review Questions, and Exemplar Key Terms

• Relate / Link Concepts Questions

  • Comfort & Impetigo: What actions improve comfort for a $2\text{-year-old}$ patient with nonbullous impetigo? What caretaker teaching improves child comfort?

  • Development & Vitiligo: How do you explain vitiligo to a $12\text{-year-old}$ in a developmentally appropriate manner? What psychosocial considerations are vital?

  • Development & Pressure Injury: What psychologic and cognitive factors must be considered when explaining pressure injury risk to an $80\text{-year-old}$ bedridden patient?

• Reflect / Apply Knowledge Scenario (Gavin Clermont)

  • Scenario: Gavin Clermont, a $15\text{-year-old}$ male, presents with worsening non-painful, non-pruritic facial bumps spreading to his chest and back. No systemic fever. Washes face with soap; no meds used. Classmates make jokes at school.

  • Reflect Questions: 1) What additional health history questions should the nurse ask? 2) What psychosocial factors increase risk? 3) What physical inspection findings should be documented? 4) What additional body systems should be examined?

• Exemplar 21.a Key Terms (Burns Overview)

  • Allograft / Homograft: Skin graft harvested from a donor of the same species.

  • Autografting: Surgical transplantation of the patient's own skin onto a wound site.

  • Burn Shock: Form of hypovolemic shock resulting from massive vascular permeability shifts following major thermal trauma.

  • Compartment Syndrome: Elevated tissue pressure within a closed fascial space compromising circulation.

  • Contracture: Permanent shortening and tightening of skin/muscle tissue limiting mobility.

  • Curling's Ulcer: Acute gastric erosion resulting from severe burn trauma.

  • Debridement / Surgical Debridement: Removal of necrotic tissue and debris from a wound bed.

  • Eschar / Escharotomy: Thick, rigid necrotic tissue; escharotomy is a surgical incision through eschar to relieve pressure.

  • Fasciectomy: Surgical excision of fascial tissue.

  • Fluid Resuscitation: Intravenous fluid administration to restore vascular volume.

  • Full Thickness Burn: Thermal destruction involving epidermis, dermis, and subcutaneous structures.

  • Heterograft / Xenograft: Skin graft harvested from a different species (e.g., porcine).

  • Hypertrophic Scar / Keloid: Abnormal overgrowth of fibrous scar tissue.

  • Partial Thickness Burn: Burn involving epidermis and variable depth of dermis.

  • Superficial Burn: Damage restricted to the epidermal layer.