TNCC Special Populations in Trauma 2 — Questions and Answers
Question 1: A 70-year-old trauma patient on warfarin presents with a GCS of 13 after a fall. The nurse should anticipate which urgent intervention?
- Observe for 6 hours before ordering a CT scan
- Immediate CT head and warfarin reversal given high risk of intracranial hemorrhage (Correct answer)
- Discharge with head injury instructions since GCS is near-normal
- Administer additional warfarin to prevent DVT from immobility
Correct answer: Immediate CT head and warfarin reversal given high risk of intracranial hemorrhage
Elderly patients on anticoagulants have significantly increased risk of intracranial hemorrhage even with minor head trauma. Immediate CT and anticoagulant reversal are priorities.
Elderly patients on anticoagulants (warfarin, DOACs) represent a unique high-risk population in trauma. Key considerations: (1) Even minor mechanisms (ground-level falls) can cause significant intracranial hemorrhage when coagulation is impaired. (2) Brain atrophy with aging stretches bridging veins, increasing subdural hematoma risk. (3) Initial GCS may be misleadingly preserved — delayed hemorrhage expansion is common. (4) Immediate CT head is mandatory regardless of initial GCS. (5) Anticoagulant reversal: warfarin → IV vitamin K + 4-factor PCC (prothrombin complex concentrate) for immediate reversal (FFP is too slow and volume-heavy); DOACs → idarucizumab for dabigatran, andexanet alfa for factor Xa inhibitors, or PCC. (6) INR should be checked immediately and followed serially. (7) Repeat CT at 6-24 hours is recommended even if initial CT is negative, as delayed hemorrhage occurs in 6-8% of anticoagulated patients. The mortality from intracranial hemorrhage in anticoagulated elderly is 50% — twice that of non-anticoagulated patients.
Question 2: Which physiological change in pregnancy makes assessment of hemorrhagic shock more challenging?
- Decreased blood volume making hemorrhage more obvious
- Physiological hypervolemia of pregnancy masking significant blood loss (Correct answer)
- Increased blood viscosity slowing hemorrhage
- Decreased cardiac output reducing the significance of blood loss
Correct answer: Physiological hypervolemia of pregnancy masking significant blood loss
Pregnancy increases blood volume by 40-50% (1,500-2,000 mL), allowing the pregnant patient to lose significant blood before showing traditional signs of shock.
Pregnancy produces significant cardiovascular changes that complicate trauma assessment: (1) Blood volume increases 40-50% (from ~4,500 mL to ~6,500 mL by third trimester) — this hypervolemia means a pregnant patient can lose 1,000-1,500 mL before showing tachycardia or hypotension, while the fetus may already be compromised (uterine blood flow is not autoregulated and decreases before maternal vital signs change). (2) Heart rate increases 15-20 bpm baseline — normal pregnancy tachycardia may mask early shock. (3) Blood pressure decreases 5-15 mmHg in second trimester — 'normal' readings may actually represent hypotension. (4) Cardiac output increases 30-50%. (5) Physiologic anemia of pregnancy (dilutional) — lower baseline hemoglobin. (6) Hypercoagulable state increases DVT/PE risk. (7) Elevated WBC count (up to 18,000) is normal. The critical teaching point: when the pregnant trauma patient shows vital sign changes, she has already lost a MASSIVE amount of blood. Fetal monitoring is an early indicator of maternal hemorrhage — fetal distress precedes maternal decompensation.
Question 3: In pediatric trauma, the most common cause of death is:
- Abdominal solid organ injury
- Thoracic aortic disruption
- Traumatic brain injury (Correct answer)
- Extremity hemorrhage
Correct answer: Traumatic brain injury
Traumatic brain injury is the leading cause of death in pediatric trauma patients, owing to the proportionally larger and heavier head and thinner cranial bones in children.
Traumatic brain injury (TBI) accounts for approximately 80% of trauma deaths in children. Several pediatric anatomical features contribute: (1) Proportionally larger, heavier head — the head accounts for a greater percentage of body weight (infant: 18% vs adult: 9%), making it the most common impact point. (2) Thinner cranial bones with less protection. (3) Higher water content and less myelinated brain — more susceptible to shearing forces and diffuse injury. (4) Open fontanelles and sutures in infants may initially accommodate intracranial swelling (masking early signs) before sudden decompensation. (5) Children have higher metabolic rate and oxygen consumption — the brain is more vulnerable to hypoxic injury. Assessment differences: GCS is modified for pre-verbal children (Pediatric GCS); vital signs vary by age (reference pediatric norms); a bulging fontanelle in infants indicates increased ICP. Prevention strategies — car seats, helmets, fall prevention — remain the most effective intervention for pediatric TBI mortality reduction.
Question 4: An obese patient (BMI 45) involved in an MVC requires intubation. Which airway challenge should the nurse anticipate?
- Easier intubation due to larger oral opening
- Rapid oxygen desaturation during apnea, difficult bag-mask ventilation, and challenging laryngoscopy (Correct answer)
- No significant difference from normal-weight patients
- Longer safe apnea time due to greater oxygen reserves
Correct answer: Rapid oxygen desaturation during apnea, difficult bag-mask ventilation, and challenging laryngoscopy
Obese patients have reduced functional residual capacity, increased oxygen consumption, redundant upper airway tissue, and challenging body habitus, leading to rapid desaturation and difficult airway management.
Obesity (BMI >30, especially morbid obesity BMI >40) presents multiple airway management challenges: (1) Rapid desaturation — reduced functional residual capacity (FRC) from abdominal mass compressing the diaphragm means smaller oxygen reserve; increased metabolic rate and oxygen consumption depletes reserves faster. Safe apnea time may be <90 seconds (vs 3-5 minutes in normal adults). (2) Difficult bag-mask ventilation — redundant pharyngeal tissue, large face/neck, and reduced chest compliance make effective mask ventilation challenging. (3) Difficult laryngoscopy — limited mouth opening from submental fat, large tongue, restricted neck extension, and anterior larynx. (4) Difficult surgical airway — obscured landmarks from cervical fat. Preparation: preoxygenate with CPAP/head-up positioning (RAMP position — elevate head/shoulders/upper body to align ear with sternal notch), have video laryngoscope available, prepare supraglottic airway as backup, have surgical airway equipment ready, and plan for rapid sequence approach to minimize apnea time.
Question 5: When assessing a geriatric trauma patient, which physiological change most increases vulnerability to thoracic injuries?
- Increased lung compliance and elastic recoil
- Chest wall stiffening from calcified costal cartilage and osteoporotic ribs (Correct answer)
- Increased respiratory muscle strength
- Enhanced cough reflex and airway protection
Correct answer: Chest wall stiffening from calcified costal cartilage and osteoporotic ribs
Age-related changes including calcified costal cartilage, osteoporotic ribs, and decreased chest wall compliance increase the risk of rib fractures and associated pulmonary injuries from relatively minor mechanisms.
Geriatric thoracic trauma is more severe than equivalent mechanisms in younger patients due to age-related changes: (1) Osteoporotic ribs fracture more easily — ground-level falls can produce multiple rib fractures that would require significant force in younger adults. (2) Calcified costal cartilage reduces chest wall compliance, making the thorax more rigid and brittle. (3) Each rib fracture in elderly patients increases mortality by 19% and pneumonia risk by 27% (Flagel et al.). (4) Decreased respiratory reserve — reduced vital capacity, FRC, and diffusing capacity mean less physiological margin. (5) Weakened cough reflex and mucociliary clearance increase pneumonia risk. (6) Kyphosis alters chest wall mechanics. (7) Pre-existing pulmonary disease (COPD, etc.) is common. Management implications: aggressive pain control (epidural, regional blocks) is essential to prevent splinting, atelectasis, and pneumonia. ICU monitoring for patients with 3+ rib fractures. Pulmonary toilet and incentive spirometry. Rib fractures in the elderly should be treated as a serious injury, not dismissed as minor trauma.
Question 6: A trauma patient with a known history of adrenal insufficiency on chronic corticosteroids presents in shock disproportionate to the apparent injury severity. The nurse should consider:
- The patient is exaggerating symptoms
- Adrenal crisis requiring stress-dose steroids (Correct answer)
- The patient's medications are causing the hypotension
- No special consideration — treat shock per standard protocol
Correct answer: Adrenal crisis requiring stress-dose steroids
Patients on chronic corticosteroids have suppressed hypothalamic-pituitary-adrenal axis and cannot mount an appropriate cortisol stress response, potentially developing adrenal crisis with refractory hypotension.
Chronic corticosteroid use suppresses the hypothalamic-pituitary-adrenal (HPA) axis. Under normal conditions, physiological stress (trauma, surgery, illness) triggers cortisol release, which supports blood pressure through catecholamine sensitization, maintains vascular tone, and provides anti-inflammatory effects. In adrenal-suppressed patients, this cortisol surge cannot occur, leading to relative adrenal insufficiency or adrenal crisis: refractory hypotension unresponsive to fluids and vasopressors, hemodynamic collapse disproportionate to injury severity, and potentially cardiovascular collapse. Treatment: IV hydrocortisone 100 mg bolus followed by 50 mg every 8 hours (stress-dose steroids). This should be administered empirically in any corticosteroid-dependent patient presenting with shock. Other special populations with increased trauma vulnerability include patients with bleeding disorders, those on antiplatelet agents, immunosuppressed patients (organ transplant recipients), and patients with implanted devices (pacemakers, defibrillators). The TNCC emphasizes that medication history is critical during the AMPLE assessment.
TNCC Special Populations in Trauma 2
A 70-year-old trauma patient on warfarin presents with a GCS of 13 after a fall.
The nurse should anticipate which urgent intervention?